WO2012022199A1 - 多载波系统中的载波测量方法及系统 - Google Patents
多载波系统中的载波测量方法及系统 Download PDFInfo
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- WO2012022199A1 WO2012022199A1 PCT/CN2011/076329 CN2011076329W WO2012022199A1 WO 2012022199 A1 WO2012022199 A1 WO 2012022199A1 CN 2011076329 W CN2011076329 W CN 2011076329W WO 2012022199 A1 WO2012022199 A1 WO 2012022199A1
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- measurement
- carrier
- signal quality
- deactivated
- requirement
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0096—Indication of changes in allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to carrier measurement techniques, and more particularly to a carrier measurement method and system in a multi-carrier system. Background technique
- the Long Term Evolution (LTE) system the maximum transmission bandwidth supported by the system is 20MHz.
- LTE-A Carrier Aggregation
- UE user equipment
- UE User Equipment
- the CA aggregates two or more component carriers (CCs) to support transmission bandwidths greater than 20 ⁇ and no more than 100 MHz.
- CCs component carriers
- the LTE-A system using carrier aggregation technology is a multi-carrier system.
- FIG. 1 is a schematic diagram of carrier aggregation according to the related art. As shown in FIG. 1, each component carrier performing carrier aggregation may be continuous or discontinuous in the frequency domain. To support carrier aggregation and enable the UE to work on multiple carriers at the same time, the radio frequency structure of the UE needs to meet the corresponding requirements. For example, in the frequency division duplex mode (FDD), the UE supports downlink carrier aggregation.
- FDD frequency division duplex mode
- the UE needs to have more than two radio receivers (Receiver) to simultaneously Receiving data on discontinuous component carriers; if receiving more than two consecutive component carriers in the frequency domain, the UE needs to have a radio receiving device with a maximum bandwidth exceeding 20 MHz, compared to a radio receiving device with a maximum bandwidth of 20 MHz in a single carrier system.
- Data is simultaneously received on a plurality of consecutive component carriers, or if the UE has multiple radio receiving devices, the UE can use the plurality of radio receiving devices to simultaneously receive data on the plurality of consecutive component carriers.
- the UE supports uplink carrier aggregation.
- the UE needs to have more than two radio transmitting devices (Transmitter); if the UE is in more than two consecutive component carriers at the same time; To transmit data, the UE needs to have a radio transmitting device with a maximum bandwidth exceeding 20 MHz or more than two radio transmitting devices.
- the principle of UE support carrier aggregation under the time division duplex mode (TDD, Time Division Duplex) is also the same.
- TDD Time Division Duplex
- the base station eNB, evolved NodeB
- the base station can configure up to 5 cells for the UE.
- the base station may add a new UE to the UE by using RRC (Radio Resource Control) signaling due to the increase of the UE service traffic or the radio resource management (RRM) requirement of the base station.
- RRC Radio Resource Control
- the configuration of the cell includes, in particular, configuration information related to the uplink and downlink carriers of the newly added cell.
- the base station may delete the cell that has been configured to the UE by using RRC signaling, specifically, including the deleted cell.
- Configuration information of the uplink and downlink carriers can occur at the same time.
- the base station configures a primary serving cell (Pcell) for the UE through an explicit configuration or a protocol, and the downlink carrier working by the Pcell is called a downlink primary carrier (DL).
- PCC Downlink Primary Component Carrier
- the uplink carrier working by the Pcell is called the uplink primary carrier (UL PCC)
- the other cells other than the Pcell configured by the UE are called the secondary serving cell (Scell, Second serving
- the downlink carrier working by the Scell is called the downlink secondary carrier (DL SCC), and the uplink carrier working by the Scell is called the uplink secondary carrier (UL SCC).
- DL SCC downlink secondary carrier
- UL SCC uplink secondary carrier
- the foregoing is configured to configure multiple cells for the UE by using RRC signaling, that is, the UE works on multiple carriers,
- the UE needs to use a radio transceiver with a bandwidth exceeding 20 MHz or use multiple radio transceivers, which will greatly increase the battery power consumption of the UE. Therefore, considering the bursty characteristics of the service, although the UE may use up to 5 carriers at most, in the burst gap, the actual traffic of the UE is rarely or close to zero. At this time, if the UE continues to be in multiple Receiving/transmitting data on a carrier will result in higher power overhead. Therefore, in order to extend the working time of the UE, turn off the radio transceiver device that is not required to be turned on, and reduce unnecessary battery consumption.
- a carrier activation/deactivation mechanism can be introduced.
- the downlink carrier and the uplink carrier in one cell can be independently activated/deactivated.
- the base station activates/deactivates the secondary carrier through an explicit media access control (MAC, Medium Access Control) command notification or through an agreed implicit rule.
- MAC Media Access Control
- the primary carrier is activated once configured, that is, the activation/deactivation mechanism is only performed for the secondary carrier.
- the UE performs data reception only on the activated downlink carrier, for example, only on the Physical Downlink Control Channel (PDCCH).
- the UE On the deactivated downlink carrier, the UE does not monitor the PDCCH channel, and does not receive physical downlink sharing. Data on the channel (PDSCH, Physical Downlink Shared Channel) to save power.
- PDSCH Physical Downlink Shared Channel
- the UE only sends data on the activated uplink carrier.
- the UE stops transmitting uplink data, including stopping the transmission of the uplink reference signal (SRS, Sounding Reference Symbols), and stopping the physical uplink control channel (PUCCH, Physical Uplink).
- the control channel transmits data, and stops transmitting data on the physical uplink shared channel (PUSCH, Physical Uplink Shared Channel).
- the frequency within the system is divided into two measurement requirements, namely, the same frequency measurement requirement and the inter-frequency measurement requirement.
- the measurement requirements include: the identification time of the cell, the measurement time of the cell, the measurement accuracy, and the like.
- the measurement is mainly used to support the handover decision. Since the frequency of the intra-frequency handover is more frequent than the inter-frequency handover, the inter-frequency measurement requires the UE to adjust the radio frequency unit, and the measurement is only required at the service frequency point relative to the same-frequency measurement. More troublesome, so the measurement requirements of the same frequency are higher than the requirements of the inter-frequency measurement.
- the cell identification time is 800 ms, and the measurement period is 200 ms.
- the inter-frequency measurement is performed, if the inter-frequency frequency is configured, and the configured measurement time slot is mode 0 (period 40), Then the basic cell identification time is 3840 ms and the measurement period is 480 ms.
- the same frequency and inter-frequency measurement requirements are further relaxed with the DRX cycle.
- the UE of the LTE-A system may have three carrier configurations in the connected state, namely configuring and activating the carrier, configuring and deactivating the carrier, and not configuring the carrier.
- the active carrier the same frequency measurement requirement as the LTE system is used, and the inter-frequency measurement requirement is used for the unconfigured carrier.
- the measurement requirements are still inconclusive. Since the measurement of the deactivated carrier is more to serve the carrier management part, the deactivated carrier can be activated quickly according to the change of the service.
- the main object of the present invention is to provide a carrier measurement method and system in a multi-carrier system, which performs measurement when matching a deactivated carrier according to its state and suitable measurement requirements, thereby satisfying the use of the deactivated carrier.
- the power saving of the UE is implemented under the premise of the requirement.
- a carrier measurement method in a multi-carrier system which sets more than one measurement requirement for deactivating a carrier; the method further includes:
- the user equipment UE applies different measurement requirements according to different states in which the carrier is deactivated.
- the different states in which the deactivated carriers are located are different according to signal quality, according to different states of the wireless environment.
- the method further includes:
- the network side notifies the UE of the correspondence between the set state of the deactivated carrier and the measurement request;
- the UE applies different measurement requirements according to different states according to the deactivated carrier:
- the UE 4 determines the state of the deactivated carrier according to the signal quality information of the deactivated carrier, determines the measurement requirement of the deactivated carrier, and measures the deactivated carrier according to the determined measurement requirement.
- the method further includes:
- the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement requirement of the deactivated carrier measurement by the UE when the signal quality is good or the signal quality is poor;
- the value of the measurement amount of the deactivated carrier signal quality corresponds to the measurement requirement of the deactivated carrier measurement when the signal quality is better than the signal quality is poor.
- the method further includes:
- the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement requirement of the UE for deactivating the carrier measurement when the signal quality is good; the value of the measured quantity of the deactivated carrier signal quality corresponds to when the signal quality is poor,
- the UE requires 2 measurements for deactivation of the carrier measurement.
- the measured quantity is an absolute measured quantity or a relative measured quantity; the measured quantity is received
- the reference signal received power (RSRP, Reference Signal Received Power) or the quality of the reference signal received by the UE (RSRQ, Reference Signal Received Quality).
- the conditions for setting a good signal quality or a poor signal quality are:
- the method further includes:
- the measurement quantity for detecting the signal quality is measured, and after the measurement result is obtained, the filtering is performed, and the filtered result is used as the final measurement result of the measurement quantity.
- the measurement requirement 1 of the deactivation carrier measurement is specifically: the measurement requirement of the activated carrier is consistent with the measurement requirement of the inter-frequency cell; or the measurement requirement of the deactivated carrier and the discontinuous reception of the activated carrier configuration (DRX, Discontinuous Reception) The measurement requirements are consistent.
- the measurement requirement of the deactivation carrier measurement is 2, specifically: the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the same frequency cell; or the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the DRX for activating the carrier configuration.
- the measuring requirement comprises at least one of the following:
- UE's measurement capability requirements frequency measurement number and time requirements, number of cell detections and time requirements, number of cell measurements and time requirements.
- a carrier measurement system in a multi-carrier system comprising: a setting unit and a measuring unit; wherein, the setting unit is configured to set more than one measurement requirement for the deactivated carrier;
- the measuring unit is disposed in the UE, and is configured to apply different measurement requirements according to different states in which the carrier is deactivated.
- the different states in which the deactivated carriers are located are different according to the quality of the wireless environment, and the states are distinguished according to the signal quality.
- the setting unit further presets a correspondence between a state of the deactivated carrier and a measurement requirement
- the measuring unit further determines the de-excitation according to signal quality information of the deactivated carrier
- the state of the live carrier is determined, and then the measurement requirement of the deactivated carrier is determined, and the deactivated carrier is measured according to the determined measurement requirement.
- the system further includes a notification unit, configured on the network side, configured to notify the UE of the correspondence between the set state of the deactivated carrier and the measurement request;
- the measuring unit further determines a state of the deactivated carrier according to signal quality information of the deactivated carrier, and further determines a measurement requirement of the deactivated carrier, and performs the deactivated carrier according to the determined measurement request. measuring.
- the setting unit further sets a measurement amount for detecting a signal quality, and a value corresponding to a measurement quantity that is poor in signal quality and better;
- the corresponding relationship between the state of the deactivated carrier and the measurement requirement is specifically: the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement of the deactivated carrier measurement when the signal quality is good or the signal quality is poor.
- Requirement 1 the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement of the deactivated carrier measurement when the signal quality is good or the signal quality is poor.
- the value of the measurement quantity of the deactivated carrier signal quality corresponds to the measurement requirement of the deactivated carrier measurement by the UE when the signal quality is better than the signal quality is poor;
- the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement requirement of the UE for deactivating the carrier measurement when the signal quality is good; the value of the measured quantity of the deactivated carrier signal quality corresponds to the worse signal quality , setting the measurement requirement of the UE for deactivating carrier measurement 2 .
- the measurement requirement of the deactivation carrier measurement is specifically as follows: The measurement requirement of the activated carrier is consistent with the measurement requirement of the inter-frequency cell; or the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the DRX for activating the carrier configuration.
- the measurement requirement of the deactivation carrier measurement is 2, specifically: the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the same frequency cell; or the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the DRX for activating the carrier configuration.
- the measuring requirement comprises at least one of the following:
- the measurement requirement for the deactivated carrier is first set and configured in the UE, or broadcasted to the UE by the network side or sent to the UE through dedicated signaling, and each UE deactivates the carrier according to the set measurement requirement.
- the measurement is performed, and the UE dynamically adjusts the measurement requirement of the deactivated carrier according to the signal quality change of the deactivated carrier, thereby achieving the effect of both fast activation and power saving of the deactivated carrier.
- FIG. 1 is a schematic diagram of carrier aggregation according to the related art
- Figure 2 is a schematic diagram of the dynamic adjustment measurement requirements according to the signal quality change
- Figure 2a is another schematic diagram of dynamically adjusting measurement requirements based on signal quality changes
- FIG. 3 is a schematic structural diagram of a carrier measurement system in a multi-carrier system according to the present invention. detailed description
- the basic idea of the invention is that there are multiple measurement requirements for the deactivated carrier, depending on the different states of the deactivated carrier, applying different measurement requirements.
- the corresponding relationship between the measurement status determination and the measurement requirement may be configured in the UE by using a predefined correspondence, or broadcasted to the UE by the network side or sent to the UE through dedicated signaling, and each UE goes to the set measurement request.
- the carrier is activated for measurement, so that the UE can dynamically adjust the measurement requirements for the deactivated carrier according to the state change of the deactivated carrier.
- Deactivating the state of the carrier can deactivate the radio state of the carrier, deactivate the carrier's transmission state, and deactivate the carrier's priority state.
- the radio state of the deactivated carrier is determined by the signal quality of the deactivated carrier.
- the transmission state of the deactivated carrier or the priority state of the deactivated carrier is similar to the wireless state, only The judgment condition is different.
- the transmission status may be obtained according to historical transmission statistics of the carrier, or a priority status set according to information indicated by the eNB.
- the correspondence between the measurement requirement of the deactivated carrier and the condition that the signal quality needs to be met is set.
- the UE measures the deactivated carrier according to the measurement requirement.
- the correspondence between the radio status and the measurement requirement is that when the deactivated carrier signal quality satisfies the good signal quality or the poor condition, the UE measures the deactivated carrier with a lower measurement requirement (measurement requirement 1).
- the signal quality is better or worse, and the corresponding signal quality meets the condition.
- the lower measurement requirement is relative to the higher measurement requirement, and the specific measurement is to be described in detail later, such as the LTE system.
- the inter-frequency measurement requirement is lower than the same-frequency measurement requirement, so the above-mentioned lower measurement requirement may be an inter-frequency measurement requirement in the LTE system, that is, the measurement requirement of the deactivated carrier is consistent with the inter-frequency cell measurement requirement; or The measurement requirements for DRX to activate the carrier configuration are consistent.
- the UE measures the deactivated carrier with a higher measurement requirement (measurement requirement 2).
- the higher measurement requirement may be a relatively low inter-frequency measurement requirement, as the frequency measurement requirement, that is, the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the same-frequency cell or other activated serving cell; or Consistent with the measurement requirements of the DRX that activates the carrier configuration, the measurement requirements for the DRX configuration here are higher than the DRX configuration for the lower measurement requirements described above.
- the corresponding relationship may also be that when the deactivated carrier signal quality satisfies the signal quality, the UE measures the deactivated carrier with a lower measurement requirement (measurement requirement 1). When the de-energized carrier satisfies the condition of poor signal quality, the UE measures the deactivated carrier with a higher measurement requirement (measurement requirement 2).
- the foregoing signal quality condition may be specifically a threshold condition of the measurement quantity, where the measurement condition may be the power of the received reference signal in LTE (Reference Signal Received) Power, referred to as RSRP, in dBm) or the quality of the reference signal received by the UE (Reference Signal Received Quality, referred to as RSRQ, in dB).
- the threshold condition may be that the above measured quantity is higher or lower than a specific threshold, or higher than and lower than a specific threshold.
- the threshold may be an absolute threshold, such as the deactivation carrier RSRP is higher than N dBm, the deactivation carrier RSRQ is lower than M dB, or the deactivation carrier RSRP is higher than A dBm and lower than B dBm; wherein, A, B, Both M and N are real numbers.
- the threshold value may also be a relative threshold, where the relative threshold may be measured relative to a specified cell, such as relative to a serving cell, where the serving cell may be in carrier aggregation.
- the primary cell such as the deactivated carrier RSRP, is higher than the primary cell RSRQ K (real) dB.
- the threshold condition may be that the eNB notifies the UE through dedicated or public signaling, or may be specified by the UE itself, such as a threshold that can be flexibly adjusted according to its own capabilities or power saving requirements, or a threshold predefined by the protocol.
- the above signal quality may be a filtered result, for example, the measured value is subjected to conditional judgment after L3 filtering by LTE.
- the measurement requirements include the measurement capability requirements of the UE, the number of frequency measurements and time requirements, the number of cell detections and time requirements, the number of cell measurements, and the time requirement. The more the number of measurements, the shorter the measurement time means the higher the measurement requirements.
- the measurement time is taken as an example.
- the measurement period of the intra-frequency cell is 200 ms; the measurement period of the inter-frequency cell and the measurement GAP are configured and the frequency to be measured (including all the inter-frequency measurement using GAP)
- the frequency is related to the number of different system frequencies.
- gap mode 0 GAP pattemO
- the measurement period is 480x Nfreq.
- the measurement period is 240 ⁇ Nfreq, where Nfreq is the frequency.
- the number of measurements is also related to the DRX cycle.
- the DRX cycle is less than 40ms, the same frequency measurement period is the same as the unconfigured DRX same frequency measurement period, which is 200ms. When it is greater than 40ms, the same frequency measurement period is 5s.
- the frequency measurement period is related to the GAP pattern. When the DRX period is less than 160ms, the measurement period and the period are not The DRX is configured with the same frequency measurement period.
- the measurement period is 5.12x Nfreq
- the measurement period is 6.4 ⁇ Nfreq.
- the present invention does not limit the specific measurement requirement parameters.
- the existing defined measurement requirements are taken as an example, but the limitation is not limited to the above-mentioned defined measurement requirements, and the measurement requirements that may be added in the future are also applicable. .
- the wireless state is determined by the relative condition, and the condition 1 is RSRP Scell>RSRPPcell-2dBm, and the condition 2 is RSRP Scell ⁇ RSRPPcell-5dBm, and condition 3 is satisfied as condition 1 or condition 2 cannot be satisfied.
- the corresponding measurement requirements require two types of co-frequency measurement requirements, and inter-frequency measurement requirements. Which satisfies the condition 1 or condition 2 corresponding to the inter-frequency measurement requirement, and satisfies the condition 3 corresponding to the same-frequency measurement requirement.
- the base station configures two carriers for the UE to perform carrier aggregation.
- the primary cell Pcell and the secondary cell ScelL Pcell and Scell both have uplink and downlink carriers, and the downlink carrier of the Pcell belongs to the 2G Hz band. It belongs to the 800M Hz band.
- the UE uses a multi-receiver technology for carrier aggregation of carriers that are isolated from such a frequency band, that is, a carrier of one frequency band is received by a set of independent RF receiving circuits.
- the Pcell is activated by default, and the Scell is inactive by default. When the service traffic of the UE increases, the Scell is activated for data transmission.
- the eNB may notify the UE to deactivate the Scell, or the UE may use the deactivation timer, when there is no data transmission for a period of time.
- Scell can enter the deactivated state by itself.
- the eNB also configures the corresponding measurement for the UE.
- the eNB configures the UE to measure the frequency F1 where the Pcell is located, the frequency F2 where the Scell is located, and the other frequency F3, and configure the Measurement GAP to be pattern 0.
- the UE measures the frequency of the cell on the frequency at which the Pcell is located according to the same frequency measurement requirement of the non-DRX configuration, that is, the cell with the frequency of the Pcell is measured in a period of 200 ms, and the cell at the frequency of the F3 is in accordance with the regulations.
- the measurement period is 480 ⁇ Nfreq.
- the deactivation carrier is full.
- the signal quality of the foot satisfies the condition 1 (the relative threshold is RSRP Scell > RSRPPcell-2dBm in this embodiment)
- the de-activated Scell is measured using the inter-frequency measurement, otherwise the frequency of the deactivated Scell is required to be used by the same-frequency measurement.
- the upper cell performs measurements. If the Scell satisfies the RSRP Scell>RSRPPcell-2dBm at this time, the Scell signal is good and does not need to be measured frequently.
- condition 2 relative threshold RSRP Scell ⁇ RSRPPcell-5dBm
- the UE When the Scell signal is between strong and weak, it needs to be determined as soon as possible whether it is suitable for activation, or whether it is not suitable for activation. In addition, the UE also needs to shorten the measurement period of deactivating the Scell. In this embodiment, for example, when the Scell signal quality satisfies the condition When the above condition 1 or condition 2 cannot be satisfied, that is, when RSRP Scell ⁇ RSRPPcell-2dBm and RSRP Scell>RSRPPcell-5dBm, the UE uses the same frequency measurement requirement to measure it, that is, the deactivated Scell is measured every 200ms.
- the UE may enable the independent radio frequency receiving circuit to measure the cell on the frequency where the Scell is located. If the Pcell and the Scell belong to the same frequency band, as if they belong to the 2G frequency band, the Scell needs to tuned its receiver when the RSRP Scell ⁇ RSRPPcell - 2dBm and RSRP Scell>RSRPPcell-5dBm are satisfied, and simultaneously receive and measure the Pcell and the Scell, and measure the Pcell. Use the same measurement requirements as Scell.
- the UE may turn off the dedicated receiver of the Scell for the UE with the redundant receiver, and measure the Scell when the GAP is used.
- the UE may be tuned when the condition is met. The receiver only receives the Pcell, and uses the inter-frequency measurement requirement for the Scell. When the GAP is used, the measurement is performed.
- the conditions that the above signal quality should satisfy may be preset, or the eNB is configured by public signaling or dedicated signaling.
- dedicated signaling can be passed through the measurement tasks of the LTE system.
- the serving cell is better than the specified threshold 1, as in the embodiment, 80 dBm is taken, and A2 is the serving cell is less than the specified threshold 2, which is 100 dBm in this embodiment.
- the Scell satisfies the A1 event or the A2 event, it enters the trigger cell list (CellTriggerList) of the A1 event or the A2 event.
- CellTriggerList the trigger cell list of the A1 event or the A2 event.
- Scell when not inactive, Scell uses looser measurement requirements to achieve power saving.
- it can also be configured to relax the measurement in a DRX-like manner, such as DRX.
- the measurement period of more than 40ms is measured every 5s. The latter is more suitable for the Pcell configuration.
- the DRX period is configured to be 0.256s.
- the inter-frequency cell measurement period will be extended to 5.12xNfreqs.
- the deactivated Scell uses the measurement request of the active carrier, which is the same as the measurement request of the PCell. .
- FIG. 2 is a schematic diagram of dynamically adjusting measurement requirements according to signal quality changes.
- the two horizontal dashed lines in the figure are the condition 1 and condition 2 of the foregoing setting.
- the measurement requirements are relatively low, and the measurement activity is relatively small.
- the deactivated carrier condition is between the two horizontal dashed lines in the figure, the measurement activity is relatively frequent.
- Figure 2a is another schematic diagram of dynamically adjusting the measurement requirements according to the signal quality change. As shown in Figure 2a, the dashed line corresponds to the previously set condition 3. When the condition 3 (lower part of the dotted line) is not met, the measurement requirements are relatively high.
- the measurement activity is relatively frequent, and when the condition 3 (the upper part of the dotted line) is satisfied, the set measurement requirements are relatively low, and the measurement activity is relatively small.
- the above is a scenario in which two wireless states correspond to two measurement requirements.
- Another typical mode may also be a scenario in which two wireless states correspond to two measurement requirements.
- the threshold may be predefined.
- the eNB assigns to the UE, such as the above A1 event or A2 event, or an otherwise specified s-threshold. When the UE determines that the deactivated cell satisfies the A1 event or is greater than the s-threshold, the signal for deactivating the Scell is good enough to determine the go.
- the activation of the Scell can be activated, and the Scell uses the looser measurement requirements described above to achieve power saving. Otherwise, when the eNB does not satisfy the A1 event, or satisfies the A2 event or is less than the s-threshold, the signal for deactivating the Scell is not good enough at this time, and it cannot be determined that the activated Scell can be activated, and the Scell uses the above-mentioned higher measurement requirement.
- the UE dynamically adjusts the measurement requirement of the deactivated carrier according to the signal quality change of the deactivated carrier, thereby achieving the effect of both fast activation and power saving of the deactivated carrier.
- the carrier measurement system in the multi-carrier system of the present invention includes a setting unit 30 and a measurement unit 31;
- the setting unit 30 is configured to set more than one measurement requirement for the deactivated carrier
- the measuring unit 31 is disposed in the UE, and is configured to apply different measurement requirements according to different states in which the carrier is deactivated.
- the different states in which the above deactivated carriers are located are based on the signal quality to distinguish states according to the wireless environment.
- the setting unit 30 further presets a correspondence relationship between the state of the deactivated carrier and the measurement request;
- the measuring unit 31 further determines the state of the deactivated carrier according to the signal quality information of the deactivated carrier, and further determines the measurement requirement of the deactivated carrier, and determines the deactivated carrier according to the determined measurement requirement. Make measurements.
- the carrier measurement system in the multi-carrier system of the present invention further includes a notification unit (not shown in FIG. 3), which is disposed on the network side for setting the state of the set deactivated carrier. Notifying the UE of the correspondence between the measurement requirements;
- the measuring unit 31 further determines the state of the deactivated carrier according to the signal quality information of the deactivated carrier, and further determines the measurement requirement of the deactivated carrier, and determines the deactivated carrier according to the determined measurement requirement. Make measurements.
- the setting unit 30 further includes a measurement amount for detecting a signal quality, and a value corresponding to a measurement quantity that is poor in signal quality and better;
- the corresponding relationship between the state of the deactivated carrier and the measurement requirement is specifically: the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement of the deactivated carrier measurement when the signal quality is good or the signal quality is poor.
- Requirement 1 the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement of the deactivated carrier measurement when the signal quality is good or the signal quality is poor.
- the value of the measurement quantity of the deactivated carrier signal quality corresponds to the measurement requirement of the deactivated carrier measurement by the UE when the signal quality is better than the signal quality is poor;
- the value of the measured quantity of the deactivated carrier signal quality corresponds to the measurement requirement of the UE for deactivating the carrier measurement when the signal quality is good; the value of the measured quantity of the deactivated carrier signal quality corresponds to the worse signal quality , setting the measurement requirement of the UE for deactivating carrier measurement 2 .
- the measurement requirement of the deactivated carrier measurement is specifically as follows: The measurement requirement of the activated carrier is consistent with the measurement requirement of the inter-frequency cell; or the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the DRX for activating the carrier configuration.
- the measurement requirement for deactivating the carrier measurement is as follows: The measurement requirement of the deactivated carrier is consistent with the measurement requirement of the same frequency cell; or, the measurement requirement of the deactivated carrier is consistent with the measurement requirement of the DRX for activating the carrier configuration.
- the above measurement requirements include at least one of the following:
- UE's measurement capability requirements frequency measurement number and time requirements, number of cell detections and time requirements, number of cell measurements and time requirements.
- the carrier measurement system in the multi-carrier system shown in FIG. 3 of the present invention is designed to implement the carrier measurement method in the foregoing multi-carrier system, and the implementation functions of the foregoing processing units may refer to the foregoing method. Understand the relevant description.
- the functions of the various processing units in the figure can be implemented by a program running on a processor, or by a specific logic circuit.
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- Mobile Radio Communication Systems (AREA)
Description
多载波系统中的载波测量方法及系统 技术领域
本发明涉及载波测量技术, 尤其涉及一种多载波系统中的载波测量方 法及系统。 背景技术
长期演进( LTE , Long Term Evolution ) 系统中, 系统支持的最大传输 带宽为 20MHz。 为向移动用户提供更高的数据速率, 高级长期演进系统 ( LTE-A, Long Term Evolution Advance )提出了载波聚合技术( CA, Carrier Aggregation ), 其目的是为具有相应能力的用户设备( UE, User Equipment ) 提供更大宽带, 提高用户设备的峰值速率。 CA将两个或者更多的分量载波 ( CC , Component Carriers ) 聚合起来以支持大于 20ΜΗζ , 最大不超过 100MHz的传输带宽。釆用载波聚合技术的 LTE-A系统是一种多载波系统。
图 1为根据相关技术的载波聚合的示意图, 如图 1所示, 进行载波聚 合的各个分量载波在频域上可以是连续的, 也可以是不连续的。 要支持载 波聚合而使 UE可以同时工作在多个载波上, UE的射频结构需要满足相应 的要求。 以频分双工模式(FDD, Frequency Division Duplex ) 下 UE支持 下行载波聚合为例, 若接收两个以上不连续的分量载波, UE需要有两个以 上无线电接收设备(Receiver )才能同时在多个不连续的分量载波上接收数 据; 若接收两个以上频域上连续的分量载波, 相对于单载波系统中最大带 宽为 20MHz的无线电接收设备, UE需要有一个最大带宽超过 20MHz的无 线电接收设备才能同时在多个连续的分量载波上接收数据, 或者如果 UE 有多个无线电接收设备, UE可以使用该多个无线电接收设备同时在该多个 连续分量载波上接收数据。
同样对于 FDD下 UE支持上行载波聚合, 若 UE同时在两个以上不连 续的分量载波上发送数据, UE 需要有两个以上无线电发送设备 ( Transmitter ); 若 UE同时在两个以上连续的分量载波上发送数据, UE需 要有一个最大带宽超过 20MHz的无线电发送设备或者两个以上的无线电发 送设备。 时分双工模式( TDD , Time Division Duplex )下 UE支持载波聚合 原理也一样。 以上 Receiver和 Transmitter在 UE上实现时可能归结为同一 个设备, 即统一的无线电收发设备, 或称无线电射频单元。
引入载波聚合技术后, 基站(eNB, evolved NodeB )可以为 UE配置 至多 5个小区。 UE在一个小区上建立了业务后, 因 UE业务流量增加或者 基于基站的无线资源管理(RRM, Radio Resource Management )需求, 基 站可以通过无线资源控制 (RRC, Radio Resource Control )信令为 UE增加 新的小区配置, 具体地, 包括配置新增小区的上、 下行载波相关的配置信 息。 相反的, 因 UE业务流量减少, 或者当前配置给 UE的小区信号质量变 差, 或者基于基站的 RRM管理, 基站可以通过 RRC信令删除已经配置给 UE的小区, 具体地, 包括所删除小区的上、 下行载波的配置信息。 以上增 加、 删除小区配置的过程可以同时发生。
在上述增加或者删除小区配置的过程中, 基站会通过显式的配置或者 按照协议约定为 UE配置一个主服务小区( Pcell, Primary serving cell ), Pcell 所工作的下行载波称为下行主载波 ( DL PCC, Downlink Primary Component Carrier ), Pcell所工作的上行载波称为上行主载波( UL PCC, Uplink Primary Component Carrier ),基站为 UE配置的 Pcell之外的其他小区称为辅服务小 区( Scell, Second serving cell ), Scell所工作的下行载波称为下行辅载波( DL SCC, Downlink Secondary Component Carrier ), Scell所工作的上行载波称 为上行辅载波 ( UL SCC , Uplink Secondary Component Carrier )。
以上通过 RRC信令为 UE配置多个小区, 即 UE工作在多个载波上,
UE需要使用带宽超过 20MHz的无线电收发设备或者使用多个无线电收发 设备, 将大大增加 UE 的电池耗电量。 因此考虑到业务的突发特点, 虽然 UE最多可能使用多至 5个载波的带宽, 但是在突发间隙, UE的实际业务 流量很少或者接近于零, 此时, 如果 UE还继续在多个载波上接收 /发送数 据, 将会导致较高的功率开销。 因此, 为了延长 UE的工作时间, 关闭不必 要开启的无线电收发设备, 减少不必要的电池消耗, 在上述增加 /减少小区 配置 (载波配置) 的基础上, 可以引入载波激活 /去激活机制。 一个小区中 的下行载波和上行载波可以独立激活 /去激活。 基站通过显式媒体接入控制 ( MAC , Medium Access Control )命令通知或通过约定的隐式规则激活 /去 激活辅载波。 为了保证通信的连续性, 主载波一旦配置, 即激活, 也即, 激活 /去激活机制只针对辅载波执行。
UE 只在激活的下行载波上进行数据接收, 如只在物理下行控制信道 ( PDCCH, Physical Downlink Control Channel )的监听; 在去激活的下行载 波上, UE 不监听 PDCCH信道, 也不接收物理下行共享信道(PDSCH, Physical Downlink Shared Channel )上的数据, 从而达到省电的目的。
UE只在激活的上行载波上发送数据; 在去激活的上行载波上, UE停 止发送上行数据, 包括停止发送上行参考信号 (SRS , Sounding Reference Symbols ), 停止在物理上行控制信道 ( PUCCH, Physical Uplink Control Channel )上发送数据, 停止在物理上行共享信道( PUSCH, Physical Uplink Shared Channel )上发送数据等。
在 LTE系统内, 为了兼顾省电和测量需求, 对于系统内的频率分为两 种测量需求, 分别是同频测量需求和异频测量需求。 测量需求包括: 小区 的识别 ( identify ) 时间、 小区的测量时间、 测量精度等。 在 LTE系统中测 量主要用于支持切换判决, 由于同频切换发生的频率比异频切换更频繁, 而异频测量需要 UE调整射频单元,相对于同频测量只需在服务频点做测量
更麻烦, 所以同频的测量需求较异频测量需求更高。 如同频测量时, 小区 识别时间为 800ms, 测量周期为 200ms, 而异频测量时, 如果配置有一个异 频频率, 配置的测量时隙 (measurement gap )是模式 0 (周期 40 ) 的情况 下,那么基本小区识别时间为 3840ms,测量周期 480ms。另外在配置有 DRX 的情况下, 考虑到省电的要求, 同频和异频测量需求随着 DRX周期进一步 进行了放宽。
根据现有结论, LTE-A系统的 UE在连接态时可能存在三种载波配置方 式, 分别为配置并激活载波, 配置并去激活载波, 未配置载波。 对于激活 载波沿用了与 LTE系统的同频测量需求, 对于未配置载波釆用了异频测量 要求。 而对于配置并去激活载波, 釆用那种测量要求还没有定论。 由于去 激活载波的测量更多的是服务于载波管理部分, 即可以根据业务的变化, 快速地激活去激活载波。 所以如果测量需求放松, 如按照异频测量要求进 行测量, 将导致对去激活载波无线质量变化的反映变慢, 而去激活载波和 激活载波使用相同的测量需求,会导致 UE需要像激活载波那样对去激活载 波进行测量, 势必比较耗电。 发明内容
有鉴于此, 本发明的主要目的在于提供一种多载波系统中的载波测量 方法及系统, 在对去激活载波进行测量时按其状态匹配合适的测量要求进 行测量, 从而在满足去激活载波使用要求的前提下实现 UE的省电。
为达到上述目的, 本发明的技术方案是这样实现的:
一种多载波系统中的载波测量方法, 为去激活载波设置一种以上的测 量要求; 所述方法还包括:
用户设备 UE根据去激活载波所处的不同状态, 应用不同的测量要求。 优选地, 所述去激活载波所处的不同状态为根据无线环境的不同, 按 照信号质量区分状态。
优选地, 所述方法还包括:
预设置所述去激活载波的状态与测量要求之间的对应关系;
或者, 网络侧将所设置的去激活载波的状态与测量要求之间的对应关 系通知给 UE;
UE根据按照去激活载波所处的不同状态, 应用不同的测量要求具体 为:
UE 4艮据去激活载波的信号质量信息确定出所述去激活载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的测量要求对所述去 激活载波进行测量。
优选地, 所述方法还包括:
设置用于检测信号质量的测量量, 以及, 对应于信号质量较差与较好 时的测量量的值;
设置去激活载波的状态与测量要求之间的对应关系具体为:
去激活载波信号质量的测量量的值对应于信号质量较好或信号质量较 差时, 应用 UE对去激活载波测量的测量要求 1 ;
去激活载波信号质量的测量量的值对应于信号质量较好与信号质量较 差之间时, 应用 UE对去激活载波测量的测量要求 2。
优选地, 所述方法还包括:
设置用于检测信号质量的测量量, 以及, 对应于信号质量较差与较好 时的测量量的值;
设置去激活载波的状态与测量要求之间的对应关系具体为:
去激活载波信号质量的测量量的值对应于信号质量较好时, 应用 UE 对去激活载波测量的测量要求 1 ;去激活载波信号质量的测量量的值对应于 信号质量较较差时, 设置 UE对去激活载波测量的测量要求 2。
优选地, 所述测量量为绝对测量量或相对测量量; 所述测量量为接收
到的参考信号的功率(RSRP, Reference Signal Received Power )或 UE接 收到的参考信号的质量( RSRQ, Reference Signal Received Quality )。
优选地, 设置信号质量较好或信号质量较差的条件为:
信号的测量量满足预定义的门限条件, 或者, 触发了设定的测量事件。 优选地, 所述方法还包括:
对所述用于检测信号质量的测量量进行测量, 获取测量结果后, 进行 滤波, 并将滤波后的结果作为测量量的最终测量结果。
优选地, 去激活载波测量的测量要求 1 具体为: 激活载波的测量要求 与异频小区测量要求一致; 或者, 去激活载波的测量要求与激活载波配置 的非连续接收(DRX, Discontinuous Reception ) 的测量要求一致。
优选地, 去激活载波测量的测量要求 2 , 具体为: 去激活载波的测量要 求与同频小区测量要求一致; 或者, 去激活载波的测量要求与激活载波配 置的 DRX的测量要求一致。
优选地, 所述的测量要求包括以下的至少之一:
UE的测量能力要求, 频率测量个数和时间要求, 小区检测个数和时间 要求, 小区测量个数和时间要求。
一种多载波系统中的载波测量系统, 包括设置单元和测量单元; 其中, 设置单元, 用于为去激活载波设置一种以上的测量要求;
测量单元, 设置于 UE中, 用于根据去激活载波所处的不同状态, 应用 不同的测量要求。
优选地, 所述去激活载波所处的不同状态为根据无线环境的不同, 按 照信号质量区分状态。
优选地, 所述设置单元进一步预设置所述去激活载波的状态与测量要 求之间的对应关系;
所述测量单元进一步根据去激活载波的信号质量信息确定出所述去激
活载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的 测量要求对所述去激活载波进行测量。
优选地, 所述系统还包括通知单元, 设置于网络侧, 用于将所设置的 去激活载波的状态与测量要求之间的对应关系通知给 UE;
所述测量单元进一步根据去激活载波的信号质量信息确定出所述去激 活载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的 测量要求对所述去激活载波进行测量。
优选地, 所述设置单元进一步设置用于检测信号质量的测量量, 以及, 对应于信号质量较差与较好时的测量量的值;
其中, 去激活载波的状态与测量要求之间的对应关系具体为: 去激活载波信号质量的测量量的值对应于信号质量较好或信号质量较 差时, 应用 UE对去激活载波测量的测量要求 1 ;
去激活载波信号质量的测量量的值对应于信号质量较好与信号质量较 差之间时, 应用 UE对去激活载波测量的测量要求 2;
或者, 去激活载波信号质量的测量量的值对应于信号质量较好时, 应 用 UE对去激活载波测量的测量要求 1 ; 去激活载波信号质量的测量量的值 对应于信号质量较较差时, 设置 UE对去激活载波测量的测量要求 2。
优选地, 去激活载波测量的测量要求 1 具体为: 激活载波的测量要求 与异频小区测量要求一致; 或者, 去激活载波的测量要求与激活载波配置 的 DRX的测量要求一致。
优选地, 去激活载波测量的测量要求 2 , 具体为: 去激活载波的测量要 求与同频小区测量要求一致; 或者, 去激活载波的测量要求与激活载波配 置的 DRX的测量要求一致。
优选地, 所述的测量要求包括以下的至少之一:
UE的测量能力要求, 频率测量个数和时间要求, 小区检测个数和时间
要求, 小区测量个数和时间要求。
本发明中, 首先设置对去激活载波的测量要求, 并将其配置于 UE中, 或由网络侧广播给 UE或通过专用信令发送给 UE, 各 UE按照设定的测量 要求对去激活载波进行测量, UE根据去激活载波的信号质量变更动态调整 对去激活载波的测量要求, 从而达到了兼顾去激活载波的快速激活和省电 的效果。 附图说明
图 1为根据相关技术的载波聚合的示意图;
图 2为才艮据信号质量变更动态调整测量要求示意图;
图 2a为根据信号质量变更动态调整测量要求的另一示意图;
图 3为本发明多载波系统中的载波测量系统的组成结构示意图。 具体实施方式
本发明的基本思想为, 对去激活载波的有多种测量要求, 根据去激活 载波的处于的不同的状态, 应用不同的测量要求。 所述的测量状态判断以 及测量要求的对应关系可以是有预定义对应关系配置于 UE中,或由网络侧 广播给 UE或通过专用信令发送给 UE, 各 UE按照设定的测量要求对去激 活载波进行测量, 这样, UE即可根据去激活载波的状态变更动态调整对去 激活载波的测量要求。
为使本发明的目的、 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。
去激活载波的状态可以去激活载波的无线状态, 去激活载波的传输状 态, 去激活载波的优先级状态。
去激活载波的无线状态由去激活载波的信号质量进行判定。 所述的去 激活载波的传输状态或者去激活载波的优先级状态, 与无线状态类似, 只
是判断条件不同, 如传输状态可以是根据该载波之前历史传输统计获得, 或者根据 eNB指示的信息设置的优先级状态。
首先设定去激活载波的测量要求与信号质量需满足条件之间的对应关 系, UE在去激活载波的信号质量满足条件时, 根据测量要求对去激活载波 进行测量。
具体地, 无线状态和测量要求的对应关系有, 当去激活载波信号质量 满足信号质量较好时或者较差条件时, UE以较低的测量要求 (测量要求 1 ) 对去激活载波进行测量。 所述的信号质量较好或者较差由对应的信号质量 满足条件判断, 所述的较低的测量要求是相对于较高的测量要求而言, 具 体测量要就见后续详细描述, 如 LTE系统中的异频测量要求要低于同频测 量要求, 所以上述的较低的测量要求可以是 LTE系统中的异频测量要求, 即去激活载波的测量要求和异频小区测量要求一致; 或者和激活载波配置 的 DRX的测量要求一致。
当去激活载波信号质量无法满足信号质量较好时或者较差条件时, UE 以较高的测量要求(测量要求 2 )对去激活载波进行测量。 所述的较高的测 量要求可以是相对较低的异频测量要求而言, 如同频测量要求, 即去激活 载波的测量要求和同频小区或者其它其激活的服务小区的测量要求一致; 或者和激活载波配置的 DRX的测量要求一致, 此处的 DRX配置的测量要 求要高于上述较低的测量要求的 DRX配置。
具体地对应关系还可以有, 当去激活载波信号质量满足信号质量较好 时, UE以较低的测量要求 (测量要求 1 )对去激活载波进行测量。 当去激 活载波满足信号质量较差条件时, UE以较高的测量要求(测量要求 2 )对 去激活载波进行测量。
上述的信号质量条件, 可以具体为测量量的门限条件, 所述测量条件 在 LTE 中可以是接收到的参考信号的功率 (Reference Signal Received
Power, 简称为 RSRP , 单位为 dBm ) 或 UE接收到的参考信号的质量 ( Reference Signal Received Quality, 简称为 RSRQ, 单位为 dB )。 所述门限 条件, 可以是上述测量量高于或者低于特定门限值, 或者高于且低于特定 门限值。 所述门限值可以是绝对门限, 如去激活载波 RSRP高于 N dBm, 去激活载波 RSRQ低于 M dB, 或者去激活载波 RSRP高于 A dBm同时低 于 B dBm; 其中, A、 B、 M及 N均为实数。 上述的门限值也可以是相对门 限, 所述相对门限值, 可以是相对于指定小区测量量, 如相对于某服务小 区为相对,在 LTE-A系统中该服务小区可以是载波聚合中的主小区( Primary Cell ), 如去激活载波 RSRP高于主小区 RSRQ K (实数 ) dB。 上述门限条 件可以是 eNB通过专用或者公用信令通知 UE的, 也可以是 UE 自身指定 的, 如根据自身的能力或者省电要求等可以灵活调整的门限, 也可以是协 议预定义的门限。 为了防止在信号波动误触发信号质量条件, 上述信号质 量触发时可以是经过滤波后的结果,如测量值在经过 LTE的 L3滤波后再进 行条件判断。
所述的测量要求包括 UE的测量能力要求, 频率测量个数和时间要求, 小区检测个数和时间要求, 小区测量个数和时间要求。 其中测量个数越多, 测量时间越短则意味着测量要求越高。 下面以测量时间为例, 在 LTE系统 中同频小区的测量周期时 200ms ; 异频小区的测量周期和测量间隙 ( measurement GAP ) 的配置以及需要测量的频率(包括所有使用 GAP进 行测量的异频频率和异系统频率) 个数相关, 当使用间隙模式 0 ( GAP pattemO ) 时, 测量周期为 480x Nfreq , 当使用间隙模式 1 ( GAP patteml ) 时, 测量周期为 240 <Nfreq, 其中, Nfreq为频率个数; 配置的测量要求还 与 DRX周期相关,当 DRX周期小于 40ms时,同频测量周期和未配置 DRX 同频测量周期相同, 为 200ms, 当大于 40ms时, 同频测量周期为 5s; 异频 测量周期和 GAP pattern相关, 当 DRX周期小于 160ms时, 测量周期和未
配置 DRX同频测量周期相同, 当 DRX周期为 256ms时,测量周期为 5.12x Nfreq, DRX周期为 320ms时, 测量周期为 6.4 <Nfreq。 本发明并不限定具 体的测量要求参数, 后续描述中, 以现有已定义的测量要求为例, 但并不 限制只适用于上述已定义的测量要求, 对未来可能新增的测量要求同样适 用。
本实施例釆用无线状态, 通过相对条件进行判断, 满足条件 1为 RSRP Scell> RSRPPcell-2dBm, 满足条件 2为 RSRP Scell<RSRPPcell-5dBm, 满足 条件 3为条件 1或者条件 2都无法满足时。 对应的测量要求有 2种同频测 量要求, 和异频测量要求。 其中满足条件 1或条件 2对应异频测量要求, 满足条件 3对应同频测量要求。
基站为 UE配置了 2个载波进行载波聚合,分别为主小区( primary cell ) Pcell和辅小区 ( secondary cell ) ScelL Pcell和 Scell同时都有上下行载波, 并且 Pcell的下行载波属于 2G Hz频段, Scell属于 800M Hz频段。 一般情 况下 UE对于这种频段隔离较远的载波进行载波聚合时釆用的多接收机技 术, 即一个频段的载波釆用一组独立的射频接收电路进行接收。 Pcell默认 处于激活状态, Scell默认处于非激活状态。 当 UE的业务流量增加时, Scell 被激活用于数据传输, 当业务流量减少时, eNB可以通知 UE将 Scell去激 活,或者 UE会根据去激活定时器,当一段时间内没有任何数据传输时, Scell 可以自行进入去激活状态。 同时 eNB还给 UE配置了相应的测量, eNB配 置 UE对 Pcell所在的频率 Fl , Scell所在的频率 F2, 以及另一个频率 F3进 行测量, 同时配置 Measurement GAP为 pattern 0。 按照 LTE系统的测量要 求, UE对 Pcell所在的频率上小区测量按照非 DRX配置的同频测量要求, 即以 200ms为周期对 Pcell所在频率的小区进行测量, 对 F3所在频率上的 小区, 按照规定, 测量周期为 480 < Nfreq。 按设定的法则, 去激活载波在满
足信号质量满足条件 1 (本实施例釆用是相对门限如 RSRP Scell> RSRPPcell-2dBm ) 时, 使用异频测量要求测量去激活的 Scell, 否则使用同 频测量要求对去激活的 Scell所在的频率上小区进行测量。 如果此时 Scell 满足 RSRP Scell>RSRPPcell-2dBm, 说明 Scell信号较好, 不需要频繁对其 进行测量, UE测量 Scell和 F2/F3上的其它相邻小区一样,在每个 GAP时, 对其进行测量, 按异频测量要求测量要求为 480 <Nfreq, 此时 Nfreq=2 , 即 每 960ms在 GAP内测量 Scell—次。 同理, 进一步地, 有信号质量满足条 件 2 (相对门限 RSRP Scell<RSRPPcell-5dBm时), 表示 Scell信号较差, 不 适合被激活, 也不需要频繁地进行测量。 当 Scell信号处于强弱之间时, 需 要尽早确定其是否适合激活, 或者是否不适合激活; 此外, UE还需要缩短 去激活 Scell的测量周期, 以本实施例为例, 当 Scell信号质量满足条件无 法满足上述条件 1或条件 2时, 即 RSRP Scell<RSRPPcell-2dBm且 RSRP Scell>RSRPPcell-5dBm 时, UE 釆用同频测量要求对其测量, 即每 200ms 测量去激活的 Scell—次。 为了满足测量要求, 对于本实施例, 在 UE有多 余的未使用的射频接收电路时, UE 可以启用该独立的射频接收电路, 对 Scell所在的频率上小区进行测量。 如果 Pcell和 Scell属于同一频段, 如同 属于 2G频段, 那么 Scell需要在满足 RSRP Scell < RSRPPcell - 2dBm且 RSRP Scell>RSRPPcell-5dBm时, 调谐其接收机, 对 Pcell和 Scell同时进行 接收, 并测量, Pcell和 Scell使用相同测量要求。 在满足上述条件 1或者条 件 2后, 对于有多余接收机的 UE, UE可以关闭 Scell的专用接收机, 在 GAP时对 Scell进行测量, 对于没有多余接收机的 UE, 可以在满足条件时 调谐其接收机, 只接收 Pcell, 对 Scell釆用异频测量要求, 在 GAP时, 进 行测量。
上述信号质量应满足的条件, 可以是预先设定的, 或者是 eNB通过公 用信令或者专用信令配置的。 如专用信令可以通过 LTE系统的测量任务进
行配置, 如配置 Scell的 Al事件或 A2事件, A1是指服务小区好于指定门 限 1 , 如本实施例中取 80dBm, A2为服务小区差于指定门限 2 , 如本实施 例中取 100dBm。 当 Scell满足 A1事件或者 A2事件时, 即进入 A1事件或 者 A2事件的触发小区列表(CellTriggerList ), 此时去激活 Scell的信号属 于足够好, 或者足够差时, 可以确定该去激活 Scell可以被激活或者不可以 不激活时, Scell釆用较松的测量要求, 以达到省电的目的, 除了前面描述 的异频测量要求, 还可以是配置类似 DRX周期的方式进行测量要求放松, 如釆用 DRX大于 40ms的测量周期,每 5s测量一次,后者较适合用于 Pcell 配置了 DRX场景, 如 DRX周期配置为 0.256s, 此时异频小区测量周期将 延长到 5.12xNfreqs。 当去激活载波不满足足 Al事件且 A2事件时, 即不在 A1事件或者 A2事件的触发小区列表, 按上述法则, 去激活的 Scell釆用激 活载波的测量要求, 此时和 PCell的测量要求相同。
图 2为根据信号质量变更动态调整测量要求示意图, 如图 2所示, 图 中的二条横虚线即为前述设定的条件 1及条件 2,当去激活的载波条件较佳 或较差时, 设置的测量要求相对较低, 测量活动相对不多, 而当去激活的 载波条件位于图中的二条横虚线之间时, 测量活动相对要频繁一些。 图 2a 为根据信号质量变更动态调整测量要求的另一示意图, 如图 2a所示, 图中 虚线对应前述设定的条件 3 , 当不能满足条件 3 (虚线之下部分) 时, 测量 要求相对较高, 测量活动相对要频繁一些, 而满足条件 3 (虚线之上部分) 时, 设置的测量要求相对较低, 测量活动相对不多。 以上是实施例是两种无线状态对应两种测量要求的场景, 另一种典型 的方式还可以是两种无线状态对应两种测量要求的场景, 根据某一门限, 这个门限可以是预定义的或者是 eNB指定给 UE的, 如上述的 A1事件或 A2事件, 或者是另外指定的 s-threshold。 当 UE判断去激活小区满足 A1事 件或者大于 s-threshold时, 此时去激活 Scell的信号属于足够好, 确定该去
激活 Scell可以被激活, Scell釆用上述的较松的测量要求, 以达到省电的目 的。否则当 eNB不满足 A1事件,或者满足 A2事件或者小于 s-threshold时, 此时去激活 Scell的信号不够好, 无法确定该激活 Scell可以被激活, Scell 釆用上述的要求较高的测量要求。
总之, UE根据去激活载波的信号质量变更动态调整对去激活载波的测 量要求, 从而达到兼顾去激活载波的快速激活和省电的效果
图 3为本发明多载波系统中的载波测量系统的第一种组成结构示意图, 如图 3所示, 本发明多载波系统中的载波测量系统包括设置单元 30和测量 单元 31 ; 其中,
设置单元 30, 用于为去激活载波设置一种以上的测量要求;
测量单元 31 , 设置于 UE中, 用于根据去激活载波所处的不同状态, 应用不同的测量要求。
上述去激活载波所处的不同状态为根据无线环境的不同, 按照信号质 量区分状态。
设置单元 30进一步预设置所述去激活载波的状态与测量要求之间的对 应关系;
测量单元 31进一步才艮据去激活载波的信号质量信息确定出所述去激活 载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的测 量要求对所述去激活载波进行测量。
在图 3 所示系统的基础上, 本发明多载波系统中的载波测量系统还包 括通知单元(图 3中未图示), 设置于网络侧, 用于将所设置的去激活载波 的状态与测量要求之间的对应关系通知给 UE;
测量单元 31进一步才艮据去激活载波的信号质量信息确定出所述去激活 载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的测 量要求对所述去激活载波进行测量。
上述设置单元 30进一步设置用于检测信号质量的测量量, 以及, 对应 于信号质量较差与较好时的测量量的值;
其中, 去激活载波的状态与测量要求之间的对应关系具体为: 去激活载波信号质量的测量量的值对应于信号质量较好或信号质量较 差时, 应用 UE对去激活载波测量的测量要求 1 ;
去激活载波信号质量的测量量的值对应于信号质量较好与信号质量较 差之间时, 应用 UE对去激活载波测量的测量要求 2;
或者, 去激活载波信号质量的测量量的值对应于信号质量较好时, 应 用 UE对去激活载波测量的测量要求 1 ; 去激活载波信号质量的测量量的值 对应于信号质量较较差时, 设置 UE对去激活载波测量的测量要求 2。
其中, 去激活载波测量的测量要求 1 具体为: 激活载波的测量要求与 异频小区测量要求一致; 或者, 去激活载波的测量要求与激活载波配置的 DRX的测量要求一致。
去激活载波测量的测量要求 2, 具体为: 去激活载波的测量要求与同频 小区测量要求一致; 或者, 去激活载波的测量要求与激活载波配置的 DRX 的测量要求一致。
上述的测量要求包括以下的至少之一:
UE的测量能力要求, 频率测量个数和时间要求, 小区检测个数和时间 要求, 小区测量个数和时间要求。
本领域技术人员应当理解, 本发明图 3 所示的多载波系统中的载波测 量系统是为实现前述的多载波系统中的载波测量方法而设计的, 上述各处 理单元的实现功能可参照前述方法的相关描述而理解。 图中的各处理单元 的功能可通过运行于处理器上的程序而实现, 也可通过具体的逻辑电路而 实现。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保
护范围。
Claims
1、 一种多载波系统中的载波测量方法, 其特征在于, 为去激活载波设 置一种以上的测量要求; 所述方法还包括:
用户设备 UE根据去激活载波所处的不同状态, 应用不同的测量要求。
2、 根据权利要求 1所述的方法, 其特征在于, 所述去激活载波所处的 不同状态为根据无线环境的不同, 按照信号质量区分状态。
3、 根据权利要求 2所述的方法, 其特征在于, 所述方法还包括: 预设置所述去激活载波的状态与测量要求之间的对应关系;
或者, 网络侧将所设置的去激活载波的状态与测量要求之间的对应关 系通知给 UE;
UE根据按照去激活载波所处的不同状态, 应用不同的测量要求为: UE 4艮据去激活载波的信号质量信息确定出所述去激活载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的测量要求对所述去 激活载波进行测量。
4、 根据权利要求 3所述的方法, 其特征在于, 所述方法还包括: 设置用于检测信号质量的测量量, 以及, 对应于信号质量较差与较好 时的测量量的值;
设置去激活载波的状态与测量要求之间的对应关系为:
去激活载波信号质量的测量量的值对应于信号质量较好或信号质量较 差时, 应用 UE对去激活载波测量的测量要求 1 ;
去激活载波信号质量的测量量的值对应于信号质量较好与信号质量较 差之间时, 应用 UE对去激活载波测量的测量要求 2。
5、 根据权利要求 3所述的方法, 其特征在于, 所述方法还包括: 设置用于检测信号质量的测量量, 以及, 对应于信号质量较差与较好 时的测量量的值; 设置去激活载波的状态与测量要求之间的对应关系为:
去激活载波信号质量的测量量的值对应于信号质量较好时, 应用 UE 对去激活载波测量的测量要求 1 ;去激活载波信号质量的测量量的值对应于 信号质量较较差时, 设置 UE对去激活载波测量的测量要求 2。
6、 根据权利要求 4或 5所述的方法, 其特征在于, 所述测量量为绝对 测量量或相对测量量; 所述测量量为接收到的参考信号的功率 RSRP或 UE 接收到的参考信号的质量 RSRQ。
7、 根据权利要求 6所述的方法, 其特征在于, 设置信号质量较好或信 号质量较差的条件为:
信号的测量量满足预定义的门限条件, 或者, 触发了设定的测量事件。
8、 根据权利要求 7所述的方法, 其特征在于, 所述方法还包括: 对所述用于检测信号质量的测量量进行测量, 获取测量结果后, 进行 滤波, 并将滤波后的结果作为测量量的最终测量结果。
9、 根据权利要求 4或 5所述的方法, 其特征在于, 去激活载波测量的 测量要求 1 为: 激活载波的测量要求与异频小区测量要求一致; 或者, 去 激活载波的测量要求与激活载波配置的非连续接收 DRX的测量要求一致。
10、 根据权利要求 9所述的方法, 其特征在于, 去激活载波测量的测 量要求 2, 为: 去激活载波的测量要求与同频小区测量要求一致; 或者, 去 激活载波的测量要求与激活载波配置的 DRX的测量要求一致。
11、 根据权利要求 4或 5所述的方法, 其特征在于, 所述的测量要求 包括以下的至少之一:
UE的测量能力要求, 频率测量个数和时间要求, 小区检测个数和时间 要求, 小区测量个数和时间要求。
12、 一种多载波系统中的载波测量系统, 其特征在于, 所述系统包括 设置单元和测量单元; 其中, 设置单元, 用于为去激活载波设置一种以上的测量要求; 测量单元, 设置于 UE中, 用于根据去激活载波所处的不同状态, 应用 不同的测量要求。
13、 根据权利要求 12所述的系统, 其特征在于, 所述去激活载波所处 的不同状态为根据无线环境的不同, 按照信号质量区分状态。
14、 根据权利要求 13所述的系统, 其特征在于, 所述设置单元进一步 预设置所述去激活载波的状态与测量要求之间的对应关系;
所述测量单元进一步根据去激活载波的信号质量信息确定出所述去激 活载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的 测量要求对所述去激活载波进行测量。
14、 根据权利要求 13所述的系统, 其特征在于, 所述系统还包括通知 单元, 设置于网络侧, 用于将所设置的去激活载波的状态与测量要求之间 的对应关系通知给 UE;
所述测量单元进一步根据去激活载波的信号质量信息确定出所述去激 活载波所处状态, 进而确定出所述去激活载波的测量要求, 并按所确定的 测量要求对所述去激活载波进行测量。
15、 根据权利要求 13或 14所述的系统, 其特征在于, 所述设置单元 进一步设置用于检测信号质量的测量量, 以及, 对应于信号质量较差与较 好时的测量量的值;
其中, 去激活载波的状态与测量要求之间的对应关系为:
去激活载波信号质量的测量量的值对应于信号质量较好或信号质量较 差时, 应用 UE对去激活载波测量的测量要求 1 ;
去激活载波信号质量的测量量的值对应于信号质量较好与信号质量较 差之间时, 应用 UE对去激活载波测量的测量要求 2;
或者, 去激活载波信号质量的测量量的值对应于信号质量较好时, 应 用 UE对去激活载波测量的测量要求 1 ; 去激活载波信号质量的测量量的值 对应于信号质量较较差时, 设置 UE对去激活载波测量的测量要求 2。
16、 根据权利要求 15所述的系统, 其特征在于, 去激活载波测量的测 量要求 1 为: 激活载波的测量要求与异频小区测量要求一致; 或者, 去激 活载波的测量要求与激活载波配置的 DRX的测量要求一致。
17、 根据权利要求 15所述的方法, 其特征在于, 去激活载波测量的测 量要求 2, 为: 去激活载波的测量要求与同频小区测量要求一致; 或者, 去 激活载波的测量要求与激活载波配置的 DRX的测量要求一致。
18、 根据权利要求 13或 14所述的系统, 其特征在于, 所述的测量要 求包括以下的至少之一:
UE的测量能力要求, 频率测量个数和时间要求, 小区检测个数和时间 要求, 小区测量个数和时间要求。
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