CN1780179A - Down dispatch information transmission for high-rate time-divided duplexing system - Google Patents
Down dispatch information transmission for high-rate time-divided duplexing system Download PDFInfo
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Abstract
A transmission method of down scheduling information for high-rate TDD system features that a rate channel code table is disclosed for decreasing the bits of down signaling as less as possible. When down signaling is transmitted by Node B, it is only needed to transmit the subscript indicators of relative options. According to this information, UE can know the maximal data rate, transmission format and channel code, which are allowed by Node B. Two time slot expressing methods are disclosed for flexible configuration of time slots.
Description
Technical field
The present invention relates to code division multiple access (be called for short CDMA) mobile communication system, be specifically related in the TDD CDMA mobile communication system of 3.84Mcps two-forty (being called for short HCR-TDD), be used for the transmission method of the down dispatch information that up channel strengthens.
Background technology
Third generation partner plan (being called for short 3GPP) is a technology standardization tissue of implementing 3-G (Generation Three mobile communication system), and wherein the 3G (Third Generation) Moblie technical standard comprises Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) pattern.3GPP is from setting up so far, respectively at having announced the Frequency Division Duplexing (FDD) (FDD) that mainly comprises 3.84Mcps and the 3-G (Generation Three mobile communication system) technical standard of time division duplex (HCR-TDD) in October, 1999, is called for short Release 99; Announce the 3-G (Generation Three mobile communication system) technical standard of the time division duplex (LCR-TDD) of the Frequency Division Duplexing (FDD) (FDD), time division duplex (HCR-TDD) and the 1.28Mcps that mainly comprise 3.84Mcps in 2000 again, be called for short Release 4; And announced again that in calendar year 2001 the interpolation high-speed data packets inserts (HSDPA) in the 3-G (Generation Three mobile communication system) technical standard of the time division duplex (LCR-TDD) of Frequency Division Duplexing (FDD) (FDD), time division duplex (HCR-TDD) and the 1.28Mcps of 3.84Mcps, is called for short Release 5.At present, 3GPP is implementing the Frequency Division Duplexing (FDD) (FDD) of 3.84Mcps, the technology of the 3-G (Generation Three mobile communication system) up link enhancing (Uplink Enhancement) of the time division duplex (LCR-TDD) of time division duplex (HCR-TDD) and 1.28Mcps is given and being ground, and expection will be in the technology standardization work of formal research up link enhancing (Uplink Enhancement) on the basis that the technology that above-mentioned up link is strengthened (Uplink Enhancement) gives grinding in 2004, the technical scheme that is produced will be contained in the Frequency Division Duplexing (FDD) (FDD) of following 3.84Mcps, the 3-G (Generation Three mobile communication system) technical standard of the time division duplex (LCR-TDD) of time division duplex (HCR-TDD) and 1.28Mcps is called for short Release 6.
The no matter Frequency Division Duplexing (FDD) (FDD) of 3.84Mcps and the up enhancement techniques of time division duplex (HCR-TDD) in the 3-G (Generation Three mobile communication system), still the up link of the time division duplex (LCR-TDD) of 1.28Mcps strengthens the technology of (Uplink Enhancement), its purpose all is by to the Frequency Division Duplexing (FDD) (FDD) by above-mentioned 3.84Mcps, the coverage of the capacity of the up link that the effective management of uplink transmission resource enforcement of the wireless network that 3-G (Generation Three mobile communication system) constituted of the time division duplex (LCR-TDD) of time division duplex (HCR-TDD) and 1.28Mcps and planning improve said system and the wireless area of said system is so that be suitable for the data service stronger to transmitting burst; In addition, by improving the performance of uplink dedicated transmission channel, thereby improve the coverage rate and the throughput of sub-district, improve uplink speed, reduce uplink delay.
The discussion that 3GPP strengthens about up channel at first is Frequency Division Duplexing (FDD) (FDD) beginning from 3.84Mcps, and in June, 2003,20 meetings of RAN agree to begin one's study up channel of time division duplex (being called for short TDD) system strengthens.The main project of research comprises the scheduling of base station (Node B) control, the request retransmission of mixing (being called for short HARQ) etc., and wherein HARQ is that automatic re-transmission and chnnel coding with packet combines a kind of method of carrying out transfer of data.At fdd mode, up channel strengthens needs some new up signalings, and they are that scheduling is relevant, that HARQ is relevant or may need in the future.Although strengthen just to enter on about the up channel of TDD, similar with FDD, in order to support the scheduling and the HARQ of Node B control, new up signaling needs equally, and they are that scheduling is relevant, that HARQ is correlated with or may need future.
Dispatching method about base station (Node B) control, at fdd mode, 3GPP TR25.896V0.4.2 has comprised two kinds of main methods: a kind of is the rate scheduling method (also being two threshold scheme) of base station (Node B) control, and another kind is the speed and the time scheduling method of base station (Node B) control.
In order to support the rate scheduling method of base station (Node B) control, two new message are introduced into: one is the speed application by name up signaling of (Rate Request is called for short RR), is used for the speed threshold values of UE to NodeB application lifting oneself; Another is that speed by name is replied the downlink signaling of (Rate Grant is called for short RG), is used for Node B and tells whether terminal (UE) allows the speed threshold values of its lifting oneself.The rate scheduling method of Node B control, its main thought is: each UE is in the initialization procedure of transmission channel, base station controller (RNC) is distributed to a transmission format composite set of UE (TFCS), and notify UE and control the base station (NodeB) of described UE, RNC also provides two threshold values respectively simultaneously: one is the UE threshold value, and another is a Node B threshold value.This TFCS has comprised multiple transmission rate.In communication process, the transmission rate that UE is free to select to be no more than the UE threshold value is TFC, if UE need adopt the TFC bigger than UE threshold value, then UE improves described UE threshold value by the up signaling of RR to Node B request.Whether decision allows to improve the threshold value of described UE to Node B according to current factors such as interference, if allow, Node B tells UE by the RG downlink signaling.Attention UE threshold value in this process can not surpass Node B threshold value.
The time and the rate scheduling scheme of second kind of base station (Node B) control, UE is before carrying out transfer of data, some information need be issued Node B to carry out the request of transfer of data, Node B is according to the information of receiving, calculate the quality of the wireless channel of UE, and, to whether allowing this UE to transmit, carry out transfer of data etc. with great speed and unify scheduling and arrange according to the situation of the request of current noise situation and other UE.Concrete process is as follows:
The first step: UE sends the request of transfer of data in the uplink scheduling information control channel.The information that sends comprises the state of the data buffer of UE, the power rating of UE or the maximum power capability of UE.
Second step: Node B monitors the length of data queue of each UE report and the information of transmitting power, is selecting the few UE even can be that a UE transmitted in the time period of next dispatching cycle of trying one's best under the condition that sub-district (Cell) noise allows.Node B replys selected UE by descending scheduling specified control channel.Institute's information transmitted comprises: allow transmission time and time period, maximum other the schedule information such as transmitting power that allows.
The 3rd step: the UE that receives communication with dispatch instructions is specifying constantly and in the time period, is pressing specified rate transmissioning data.
Speed and time scheduling method have the specific speed scheduling to control the ability of this sub-district noise level more accurately, that is to say the maximum capacity that can make this sub-district.Its cost is to need the schedule information of transmission and instruct more complicated than simple rate scheduling.
At fdd mode, Fig. 1 has provided the up signaling of a kind of transmission: mainly comprise a kind of method of data buffering and transmitted power, promptly use extra uplink physical channel, be called the uplink scheduling control channel and send the required information of uplink scheduling.
The TDD system is different with the FDD system, is that code word is limited.Whether whether above-mentioned two kinds of schemes are fit to TDD, perhaps need new scheduling scheme still to be in the research discussion.A kind of possible scheme just is based on time, speed and the physical resource scheduling scheme of (comprising code word and time slot).
Strengthen about the up channel of TDD system, divide up channel to HCR-TDD to strengthen again and the up channel of LCR-TDD is strengthened.The physical channel structure of HCR-TDD and LCR-TDD is different fully.
With reference to standard 25.221, Fig. 2 provides the physical channel structure of HCR-TDD.The physical channel of HCR-TDD is divided into system-frame (Frame), radio frames (RadioFrame) and time slot (Time Slot) on the time component as seen from the figure.A radio frames comprises the transmission intercal of 10ms, is subdivided into 15 time slots again, and each time slot length is 2560 chips (2560*Tc chips).Each time slot can be configured to up or descending, to realize the transmission of asymmetric traffic.It is descending to have at least a time slot to be designated as in any configuration, has at least a time slot to be designated as up.In the time slot a plurality of physical channels can be arranged, (OVSF) distinguishes by channel code.
The corresponding a kind of data format of physical channel is called data bursts (burst), transmits in its particular time-slot in the unlimited frame that distributes.A data burst packets is drawn together two data fields (DataSymbols), a training sequence territory (Midamble) and the spatial domain (GP) as the time slot protection.The data field of a data burst is used to carry user data and the high-rise control command from transmission channel, certainly for dedicated channel, the part symbol of data field also may be used to the signaling of physical layer for transmission, for example power control command (TPC) or transformat combination indication (TFCI).Each data field institute energy data carried by data symbolic number is relevant with employed spreading factor (SF), and the employed spreading factor of up direction can be 1,2,4,8,16 (channel code lengths).
In HCR-TDD, the Midamble during data happen suddenly can have two types, and one is that length is the short code of 256 chips, and another is that length is the long code of 512 chips.Data burst institute energy data carried by data speed is also relevant with the length of employed Midamble sign indicating number.
In standard 25.221, (Type3), data format is respectively as Fig. 3 A, Fig. 3 B, Fig. 3 C for Type1, Type2 to have defined the type of three kinds of data bursts.Two data fields that comprise in these three types, a training sequence territory (Midamble) and the length as the spatial domain (GP) of time slot protection all are different, and therefore institute can the data carried by data symbolic number also be different.
Regulation and stipulation, for many yards transmission, each UE can use two physical channels simultaneously at most in a time slot, and these two parallel physical channels use two different channel code.During the multi-slot transmission, the employed physical resource of each time slot is identical.
In sum, in the HCR-TDD system, the bit number (data rate) that each physical channel can carry and the type of data burst, the spreading factor of selecting for use, modulation system, the shared bit number of physical layer signaling TPC, TFCI that is carried, and it is relevant to be used to carry the required bit number of high-level signaling.In patent [the uplink scheduling method for transmitting signaling that is used for high-rate time-divided duplexing system], provided the possible desired data transmission rate collection of UE and the building method of subclass, it has also covered the peak transfer rate that Node B may allow UE to use.
In the up enhanced scheme of FDD, down dispatch information mainly comprises RR, allows the moment and the time period of transmission, the maximum schedule informations such as transmitting power that allow.
The TDD system is different with FDD, and up code word is limited, and promptly all activated UE shares a sign indicating number collection in certain time slot.So in the scheduling strategy of Node B, not only want scheduling time, speed, also should dispatch the operable physical resource of UE, i.e. channel code and time slot.Therefore in the descending scheduling signaling, should comprise information such as channel code and time slot.At the enhanced scheme of TDD, down dispatch information should comprise those information, how to transmit, and does not also all have to determine.
Summary of the invention
The purpose of this invention is to provide a kind of transmission method that is used for the down dispatch information of high-rate time-divided duplexing system.
For achieving the above object, a kind of transmission method that is used for the down dispatch information of high-rate time-divided duplexing system comprises step:
A) UE determines an initial desired data rates according to current transmitted power and data buffering and the information such as Qos of wanting transport service, and the subscript of this expected rate correspondence and its transmitted power are formed uplink scheduling information together;
B) UE is on the up channel of appointment, sends to node B after multiplexing with described uplink scheduling information is encoded;
C) after Node B receives the reporting information of UE transmission, resolve these information, select the part UE that permission is transmitted in the time period of next dispatching cycle;
D) Node B replys selected UE by descending scheduling specified control channel, and the down dispatch information that is transmitted comprises: information such as the subscript coding indication of rate channel code table TFRCI and time slot;
E) UE according to the descending scheduling signaling of receiving, according to information such as the code word of distributing, time slots, selects suitable current data transmission rate on the descending scheduling channel of appointment;
F) UE is specifying in the moment and time period, according to selected message transmission rate, at assigned timeslot and appointment code word transmitting data.
The present invention sets up a time slot territory in the descending scheduling signaling, can realize the flexible configuration of the shared time slot of EUCH, thereby can optimize the scheduling strategy of Node B; Information sets such as maximum data rate, channel code, data burst type are made into table, adopt the implicit representation method, Node B only need send the subscript coding indication of corresponding option, and therefore required downlink signaling bit is less; At each scheduling interval, Node B can both redistribute physical resources such as time slot and channel code, has increased the flexibility of Node B scheduling, and physical resource can be fully used; The method can increase the throughput of sub-district, and the business that improves system covers.
Description of drawings
Fig. 1 is the uplink scheduling information control channel;
Fig. 2 is the physical channel structure of HCR-TDD;
Fig. 3 A is the structure of the data burst form 1 among the HCR-TDD;
Fig. 3 B is the structure of the data burst form 2 among the HCR-TDD;
Fig. 3 C is the structure of the data burst form 3 among the HCR-TDD;
Fig. 4 is a kind of descending scheduling method for transmitting signaling that up channel strengthens that is used for;
Fig. 5 A is a kind of method for expressing in the time slot territory in the descending scheduling signaling;
Fig. 5 B is the another kind of method for expressing in the time slot territory in the descending scheduling signaling;
Fig. 6 A is a kind of method for expressing of descending scheduling signaling;
Fig. 6 B is the method for expressing of second kind of descending scheduling signaling;
Fig. 7 is the coding multiplexing method of descending scheduling signaling;
Fig. 8 is the example of first kind of descending scheduling signaling representing method;
Fig. 9 is first kind of descending scheduling signaling representing method example corresponding codes multiplex process;
Figure 10 is the example of second kind of descending scheduling signaling representing method;
Figure 11 is second kind of descending scheduling signaling representing method example corresponding codes multiplex process.
Embodiment
Core concept of the present invention is in the dispatching method of base station (node B) control, and the down dispatch information that the user sends mainly comprises the maximum data rate that allows transmission, information such as the time slot that UE can use, channel code.In order to reduce the shared bit number of downlink signaling as far as possible, the type of the data rate that the present invention sends the maximum permission, channel code, data burst etc. is taken all factors into consideration, the notion (TFRCI) of rate channel code table is proposed, when Node B sends downlink signaling, only need to send the subscript indication of respective selection correspondence.UE can be known the maximum data rate that Node B allows it and selects for use, information such as data transmission format and operable channel code according to this information.The flexibility of considering time slot configuration with take different downlink signaling bits, the present invention proposes two kinds of time slot method for expressing.The method for expressing of the down dispatch information that the present invention proposes needs less downlink signaling bit number, can increase the throughput of sub-district, and the business that improves system covers.
The present invention proposes in the HCR-TDD system, a kind of descending scheduling method for transmitting signaling that is used for the up channel enhancing, and with reference to Fig. 4, its step mainly comprises:
401 step: the UE of described figure are according to current transmitted power and data buffering and the information such as Qos of wanting transport service, determine a desired data speed, search the transmission data rate table of UE end, data rate like therefrom finding out with it recently, as its expected rate, then with the subscript of described desired data speed correspondence and current transmitted power together as the uplink scheduling information that will report Node B (SI);
402 step: the UE of described figure send to base station (node B) after multiplexing with the subscript of described desired data speed correspondence and current transmitted power are encoded on the up channel of appointment;
403 steps of described figure: Node B is behind the reporting information that receives the UE transmission on the up channel of appointment, resolve these information, select certain dispatching algorithm for use, selecting the part UE that in the time period of next dispatching cycle, allows transmission under the condition that sub-district (Cell) noise allows;
404 steps of described figure: Node B replys selected UE by descending scheduling specified control channel.The down dispatch information that is transmitted (SA) mainly comprises: information such as the subscript coding indication of rate channel code table TFRCI and time slot;
405 step: the UE of described figure are on the descending scheduling channel of appointment, and according to the descending scheduling signaling of receiving, according to the code word of distributing, time slot etc., selection is no more than a certain speed of the peak transfer rate of Node B permission, as its current transmission rate;
406 step: the UE of described figure are specifying in the moment and time period, according to selected message transmission rate, at the appointment code word transmitting data of assigned timeslot.
In wherein said 404 steps, the down dispatch information of Node B transmission comprises gap information.In HCR-TDD, 15 time slots are arranged in the radio frames, each time slot all might be used for upstream or downstream, with the variation that adapts to wireless channel and the transmission of asymmetric traffic.According to the shared bit number in time slot territory and the difference of time slot configuration flexibility, below we provide the method for expressing in two kinds of time slot territories.
Method one: with reference to Fig. 5 A, shared 8 bits are represented time slot, and 4 bits are used for expression beginning time slot (Start Slot), and 4 bits are used for expression and finish time slot (End Slot).Supposition Node B distributes continuous time slot to strengthen professional (EUCH) to up channel in this method.So only use 8 bits just can represent to be used in 15 time slots the time slot situation of EUCH.
Method two: with reference to Fig. 5 B, a shared N (0≤N≤14) bit is represented N possible time slot (TS0-TS
N) configuring condition, the value of each bit can strengthen professionally for 0 or 1,0 expression time slot corresponding be not used in up channel, 1 expression time slot corresponding is used for up channel and strengthens professional.N=14 for example, then the time slot territory needs 15 bits altogether, and expression is 14 configuring condition from time slot 0 to time slot.
Above-mentioned two kinds of methods respectively have pluses and minuses, and the required downlink signaling bit of first method is less, can reduce descending interference, thereby can increase the throughput of system, improve professional the covering, but NodeB is limited for the time slot configuration that uplink service strengthens, and only continuous time slot can be distributed to EUCH.
Comparatively speaking, the required downlink signaling bit of second method is more, but Node B is flexible for the time slot configuration that uplink service strengthens, and discontinuous time slot (time slot arbitrarily) can be distributed to EUCH.
Except time slot, in order to make UE select suitable speed, suitable transformat to transmit according to the scheduling result of Node B, downlink signaling information should comprise that also the maximum speed that allows, UE are in the operable channel code of next scheduling interval, code rate (ratio of the physics bit that valid data information bit that the user sends and shared physical channel can carry) and modulation system etc.In EUCH FDD, QPSK is used, and in like manner we think that also only QPSK is used in EUCH TDD, so Node B does not need to indicate the modulation system that will adopt to UE again.
If the expression that in downlink signaling, shows appeal information, promptly set up the maximum speed that allows, spreading factor, UE in corresponding territory such as the operable channel code of next scheduling interval, code rate respectively, the then required information bit that takies will be very many.In fact, the value in these territories conditions each other, and for example some data rate can only corresponding specific spreading factor and channel code, and the effective combination that is to say these territory values is less comparatively speaking.Therefore the present invention proposes to adopt the latent mode of showing to represent may effectively making up of these territories, these is effectively made up form corresponding table, is called for short rate channel code table TFRCI, presses the big or small ordering of data rate, indicates a certain effective combination with corresponding subscript then.If UE and Node B end all keep this table, then UE can find out information such as its corresponding maximum rate, operable channel code and code rate according to the given subscript indication of Node B in respective table.
The UE desired data Speedometer Drive that the patent [the uplink scheduling method for transmitting signaling that is used for high-rate time-divided duplexing system] that also is about to apply on the same day provides increases by row: channel code forms rate channel code table TFRCI.The physical number of bits that can carry for speed numbering, the type of data burst, spreading factor, code rate, single time slot of the data field (field, list of items) that comprises of TFRCI table, data rate (speed of maximum permission), UE are in the operable channel code of next scheduling interval like this.In fact, UE can be known corresponding spreading factor by channel code information, can infer the physical number of bits that single time slot can carry and the size of transmission block by data rate and code rate, therefore in order to reduce UE and Node B end for preserving required buffering (buffer) expense of TFRCI table, we can simplify rate channel sign indicating number TFRCI table, promptly only the type of retention data burst, code rate, data rate (the maximum speed that allows), UE in the several territories of the operable channel code of next scheduling interval.For the ease of a certain clauses and subclauses in the look-up table, can additionally increase a subscript coding indication (binary representation of bullets correspondence).
So UE end and Node B hold the contained territory (lising) of rate channel sign indicating number TFRCI table of required reservation to be: the type of data burst, code rate, data rate (the maximum speed that allows), UE are in operable channel code of next scheduling interval and the indication of subscript coding.
If comprise Y element among the rate channel code table TFRCI, then Node B can use [log in downlink signaling
2Y]=a M bit is next to allow information such as its maximum data rate of selecting for use, operable channel code and code rate to the UE indication.
In sum, down dispatch information (SA) should comprise: subscript coding indication territory and the time slot territory of rate channel code table TFRCI, n bit altogether.Two kinds of different time slot method for expressing that propose according to the present invention provide the method for expressing of two kinds of descending scheduling signalings below.
With reference to Fig. 6 A, the method for expressing of a kind of descending scheduling signaling that the present invention proposes comprises: the subscript coding indication territory of the rate channel code table TFRCI of M bit and the time slot territory of 8 bits, wherein 4 bits represent to begin time slot in the time slot territory of 8 bits, and 4 bits represent to finish time slot.
With reference to Fig. 6 B, the table of second kind of descending scheduling signaling that the present invention proposes not method comprises: the subscript coding indication territory of the rate channel code table TFRCI of M bit and the time slot territory of N (0≤N≤14) bit, N can be specified flexibly by high level, also can really economize and set a fixed value.N is big more, and time slot configuration is just flexible more.
In order further to protect these descending scheduling signaling bit, improve the reliability of their transmission, provide SA transmission of Information mode and code multiplexing process below.
Select for use one to spread to 16 up code word, data burst is that physical channel, the modulation system of Class1 is QPSK, transmit the descending scheduling signaling, consider possible TPC (being made as the m bit), will have 244-m bit space to be used to express described n SA information bit so on this channel.
The code multiplexing process of the down dispatch information SA that the present invention proposes, with reference to Fig. 7, its step mainly comprises:
701 steps of described figure: down dispatch information SA mainly comprises subscript coding indication bit and the time slot bit of rate channel code table TFRCI, altogether n bit;
702 steps of described figure: with described n SA bit stream, adopt certain coded system, for example code rate is that 1/3 convolution code or block code etc. are encoded;
703 steps of described figure: coded bit is sent into rate adaptation operating, form the data flow of 244-m bit;
704 steps of described figure: with the data flow of 244-m bit of described generation, the mode that interweave with the second time that provides according to standard 25.222 carries out interweaving the second time;
705 steps of described figure: in the bit stream after interweaving, insert m TPC bit, form data burst form as shown in the figure, on the appointment code word of assigned timeslot, send to Node B.
Embodiment
The present invention mainly is about in the HCR-TDD system, a kind of descending scheduling method for transmitting signaling that is used for the up channel enhancing is so concrete scheduling mode, uplink scheduling signaling content and the transmission means etc. of relevant Node B are omitted to some extent in the example below.
Owing in downlink signaling information, comprised the time slot territory, so rate channel sign indicating number collection only need be considered single time slot situation.The single time slot situation that provides with reference to patent [the uplink scheduling method for transmitting signaling that is used for high-rate time-divided duplexing system], when Transmission Time Interval (TTI) was 10ms, the expected rate collection of UE was as table 1, we can obtain the possible data rate and the channel code collection of its correspondence, and are as shown in table 2.
Table 1. is used to dispatch the expected rate collection of requirement under single time slot situation
| The speed numbering | The type of data burst | SF | Code rate | The physics bit | Data rate (kbps) (single time slot) |
| 0 | 1 | 4 | 1/3 | 968 | 32.27 |
| 1 | 1 | 2 | 1/3 | 1936 | 64.5 |
| 2 | 1 | 2+4 | 1/3 | 2906 | 96.8 |
| 3 | 1 | 2+4 | 1/2 | 2906 | 145.3 |
| 4 | 1 | 2+4 | 3/4 | 2906 | 217.9 |
| 5 | 2 | 2+4 | 3/4 | 3288 | 246.6 |
| 6 | 3 | 2+2 | 3/4 | 3680 | 276.0 |
| 7 | 2 | 2+2 | 3/4 | 4384 | 328.8 |
Data rate that table 2. is possible and channel code collection
| The speed numbering | The type of data burst | SF | Code rate | The physics bit | Data rate (kbps) (single time slot) | Channel code | The |
| 0 | 1 | 4 | 1/3 | 968 | 32.27 | C(4，1) | 00000 |
| 1 | 4 | 1/3 | 968 | 32.27 | C(4，2) | 00001 | |
| 1 | 4 | 1/3 | 968 | 32.27 | C(4，3) | 00010 | |
| 1 | 4 | 1/3 | 968 | 32.27 | C(4，4) | 00011 | |
| 1 | 1 | 2 | 1/3 | 1936 | 64.5 | C(2，1) | 00100 |
| 1 | 2 | 1/3 | 1936 | 64.5 | C(2，2) | 00101 |
| 2 | 1 | 2+4 | 1/3 | 2906 | 96.8 | C(2，1)+C(4，3) | 00110 |
| 1 | 2+4 | 1/3 | 2906 | 96.8 | C(2，1)+C(4，4) | 00111 | |
| 1 | 2+4 | 1/3 | 2906 | 96.8 | C(2，2)+C(4，1) | 01000 | |
| 1 | 2+4 | 1/3 | 2906 | 96.8 | C(2，2)+C(4，2) | 01001 | |
| 3 | 1 | 2+4 | 1/2 | 2906 | 145.3 | C(2，1)+C(4，3) | 01010 |
| 1 | 2+4 | 1/2 | 2906 | 145.3 | C(2，1)+C(4，4) | 01011 | |
| 1 | 2+4 | 1/2 | 2906 | 145.3 | C(2，2)+C(4，1) | 01100 | |
| 1 | 2+4 | 1/2 | 2906 | 145.3 | C(2，2)+C(4，2) | 01101 | |
| 4 | 1 | 2+4 | 3/4 | 2906 | 217.9 | C(2，1)+C(4，3) | 01110 |
| 1 | 2+4 | 3/4 | 2906 | 217.9 | C(2，1)+C(4，4) | 01111 | |
| 1 | 2+4 | 3/4 | 2906 | 217.9 | C(2，2)+C(4，1) | 10000 | |
| 1 | 2+4 | 3/4 | 2906 | 217.9 | C(2，2)+C(4，2) | 10001 | |
| 5 | 2 | 2+4 | 3/4 | 3288 | 246.6 | C(2，1)+C(4，3) | 10010 |
| 2 | 2+4 | 3/4 | 3288 | 246.6 | C(2，1)+C(4，4) | 10011 | |
| 2 | 2+4 | 3/4 | 3288 | 246.6 | C(2，2)+C(4，1) | 10100 | |
| 2 | 2+4 | 3/4 | 3288 | 246.6 | C(2，2)+C(4，2) | 10101 | |
| 6 | 3 | 2+2 | 3/4 | 3680 | 276.0 | C(2，1)+C(2，2) | 10110 |
| 7 | 2 | 2+2 | 3/4 | 4384 | 328.8 | C(2，1)+C(2，2) | 10111 |
In order to reduce buffering (buffer) expense of UE and Node B end, the rate channel sign indicating number TFRCI table after we obtain to simplify according to table 2 is as table 3.
Data rate that table 3. is possible and channel code TFRCI table
| The type of data burst | Code rate | Data rate (kbps) (single time slot) | Channel code | The coding indication |
| 1 | 1/3 | 32.27 | C(4，1) | 00000 |
| 1 | 1/3 | 32.27 | C(4，2) | 00001 |
| 1 | 1/3 | 32.27 | C(4，3) | 00010 |
| 1 | 1/3 | 32.27 | C(4，4) | 00011 |
| 1 | 1/3 | 64.5 | C(2，1) | 00100 |
| 1 | 1/3 | 64.5 | C(2，2) | 00101 |
| 1 | 1/3 | 96.8 | C(2，1)+C(4，3) | 00110 |
| 1 | 1/3 | 96.8 | C(2，1)+C(4，4) | 00111 |
| 1 | 1/3 | 96.8 | C(2，2)+C(4，1) | 01000 |
| 1 | 1/3 | 96.8 | C(2，2)+C(4，2) | 01001 |
| 1 | 1/2 | 145.3 | C(2，1)+C(4，3) | 01010 |
| 1 | 1/2 | 145.3 | C(2，1)+ C(4，4) | 01011 |
| 1 | 1/2 | 145.3 | C(2，2)+C(4，1) | 01100 |
| 1 | 1/2 | 145.3 | C(2，2)+C(4，2) | 01101 |
| 1 | 3/4 | 217.9 | C(2，1)+C(4，3) | 01110 |
| 1 | 3/4 | 217.9 | C(2，1)+C(4，4) | 01111 |
| 1 | 3/4 | 217.9 | C(2，2)+C(4，1) | 10000 |
| 1 | 3/4 | 217.9 | C(2，2)+C(4，2) | 10001 |
| 2 | 3/4 | 246.6 | C(2，1)+C(4，3) | 10010 |
| 2 | 3/4 | 246.6 | C(2，1)+C(4，4) | 10011 |
| 2 | 3/4 | 246.6 | C(2，2)+C(4，1) | 10100 |
| 2 | 3/4 | 246.6 | C(2，2)+C(4，2) | 10101 |
| 3 | 3/4 | 276.0 | C(2，1)+C(2，2) | 10110 |
| 2 | 3/4 | 328.8 | C(2，1)+C(2，2) | 10111 |
If the rate channel sign indicating number TFRCI table that Node B and UE end keep is as shown in table 3,5 bits just enough are used to represent the subscript coding indication of rate channel sign indicating number TFRCI table so.
According to table 3, the example of first kind of descending scheduling signaling representing method that the present invention proposes, with reference to Fig. 8,5 bits are used to represent the subscript coding indication of rate channel sign indicating number TFRCI table, 8 bits are represented gap information, altogether 13 bits.The corresponding codes multiplex process, with reference to Fig. 9, its step mainly comprises:
901 steps of described figure: descending scheduling SA information comprises that mainly the subscript coding indication (5 bit) and 8 bits of rate channel sign indicating number TFRCI table are represented gap information, totally 13 bits;
902 steps of described figure: with the SA bit stream of described 13 bits, adopting code rate be that 1/3 convolution code is encoded sequence behind the coding of generation (13+8) * 3=63 bit;
903 steps of described figure: sequence after the convolutional encoding is sent into 3 times of duplication code encoders, generate the sequence of 63*3=189 bit;
904 steps of described figure: the rate-matched process with reference to standard 25.222 provides through rate adaptation operating, forms the sequence of 242 bits with described sequence; In fact the operating process of rate-matched here is exactly an information of inserting 53 bits on appointed positions;
905 steps of described figure: with the data flow of 242 bits of described generation, the mode that interweave with the second time that provides according to standard 25.222 interweaves;
906 steps of described figure: in the bit stream after interweaving, insert 2 TPC bit informations, form data burst form as shown in the figure.The data burst of described formation will send on the appointment code word of assigned timeslot specifies UE.
According to table 3, the example of second kind of descending scheduling signaling representing method that the present invention proposes is supposed N=14, and with reference to Figure 10,5 bits are used to represent the subscript coding indication of rate channel sign indicating number TFRCI table, and 15 bits are represented gap information, altogether 20 bits.The corresponding codes multiplex process, with reference to Figure 11, its step mainly comprises:
1101 steps of described figure: descending scheduling SA information mainly comprises: the subscript coding indication of the rate channel sign indicating number TFRCI table of 5 bits and the gap information of 15 bits, 20 bits altogether;
1102 steps of described figure: with the SA bit stream of described 20 bits, adopting code rate be that 1/3 convolution code is encoded sequence behind the coding of generation (20+8) * 3=84 bit;
1103 steps of described figure: sequence after the convolutional encoding is sent into 2 times of duplication code encoders, generate the sequence of 84*2=168 bit;
1104 steps of described figure: the rate-matched process with reference to standard 25.222 provides through rate adaptation operating, forms the sequence of 242 bits with described sequence; In fact the operating process of rate-matched here is exactly an information of inserting 74 bits on appointed positions;
1105 steps of described figure: with the data flow of 242 bits of described generation, the mode that interweave with the second time that provides according to standard 25.222 interweaves;
1106 steps of described figure: in the bit stream after interweaving, insert 2 TPC bit informations, form data burst form as shown in the figure.The data burst of described formation will send on the appointment code word of assigned timeslot specifies UE.
Claims (11)
1. transmission method that is used for the down dispatch information of high-rate time-divided duplexing system comprises step:
A) UE determines an initial desired data rates according to current transmitted power and data buffering and the information such as Qos of wanting transport service, and the subscript of this expected rate correspondence and its transmitted power are formed uplink scheduling information together;
B) UE is on the up channel of appointment, sends to node B after multiplexing with described uplink scheduling information is encoded;
C) after Node B receives the reporting information of UE transmission, resolve these information, select the part UE that permission is transmitted in the time period of next dispatching cycle;
D) Node B replys selected UE by descending scheduling specified control channel, and the down dispatch information that is transmitted comprises: information such as the subscript coding indication of rate channel code table TFRCI and time slot;
E) UE according to the descending scheduling signaling of receiving, according to information such as the code word of distributing, time slots, selects suitable current data transmission rate on the descending scheduling channel of appointment;
F) UE is specifying in the moment and time period, according to selected message transmission rate, at assigned timeslot and appointment code word transmitting data.
2. method according to claim 1 is characterized in that in the step a), and described definite initial desired data rates comprises:
Search the desired data rates table that UE end keeps, therefrom find out with it recently like data rate.
3. method according to claim 1, it is characterized in that in the step d), described rate channel code table TFRCI comprises the type, code rate, data rate, UE of data burst in several territories such as the operable channel code of next scheduling interval, and each element among the table TFRCI is effective combination of the value in these territories.
4. method according to claim 1, it is characterized in that: the rate channel code table TFRCI described in the step d) increases by two row in described UE desired data Speedometer Drive: channel code and the indication of subscript coding, and then remove three column-generations of physical number of bits that speed numbering, spreading factor, single time slot can be carried.
5. method according to claim 1 is characterized in that: the rate channel code table TFRCI described in the step d), if comprise Y element, then Node B can use in downlink signaling
Individual bit is represented the TFRCI territory.
6. method according to claim 1, it is characterized in that: a kind of method for expressing of the down dispatch information described in the step d), comprise: the subscript coding indication of the rate channel code table TFRCI of M bit and the time slot territory of 8 bits, 4 bits represent to begin time slot in the time slot territory of 8 bits, and 4 bits represent to finish time slot.
7. method according to claim 1, it is characterized in that: the another kind of method for expressing of the down dispatch information described in the step d), comprise: the subscript coding indication of the rate channel code table TFRCI of M bit and the time slot territory of N (0≤N≤14) bit, N can be specified flexibly by high level, also can really economize and set a fixed value.
8. method according to claim 1 is characterized in that: the spreading factor SF that the control channel of the descending scheduling appointment described in the step d) uses is 16, and the type of data burst is 1.
9. method according to claim 1 is characterized in that: the code multiplexing process of the down dispatch information described in the step d) comprises:
A) down dispatch information SA information comprises subscript coding indication bit and the time slot bit of rate channel code table TFRCI, altogether n bit;
B) with described n SA bit stream, adopt certain coded system, for example code rate is that 1/3 convolution code or block code etc. are encoded;
C) coded bit is sent into rate adaptation operating, form the data flow of 244-m bit;
D) with the data flow of 244-m bit of described generation, carry out interweaving the second time;
E) in the bit stream after interweaving, insert m TPC bit, form the data burst form, on the appointment code word of assigned timeslot, send to and specify UE.
10. method according to claim 6 is characterized in that: the time slot territory of described N (0≤N≤14) bit, represent N possible time slot (TS0-TS respectively
N) configuring condition, the value of each bit can be used for descendingly for 0 or 1,0 expression time slot corresponding, 1 expression time slot corresponding is used for up channel and strengthens.
11. method according to claim 7, the mode that interweave with the second time that the code requirement 25.222 that it is characterized in that interweaving the described second time provides.
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| CNA2004100957029A CN1780179A (en) | 2004-11-24 | 2004-11-24 | Down dispatch information transmission for high-rate time-divided duplexing system |
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| CNA2004100957029A CN1780179A (en) | 2004-11-24 | 2004-11-24 | Down dispatch information transmission for high-rate time-divided duplexing system |
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