CN101207913A

CN101207913A - Network system with multi-wireless access system for coexistence

Info

Publication number: CN101207913A
Application number: CNA2006101702492A
Authority: CN
Inventors: 吕武
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-12-21
Filing date: 2006-12-21
Publication date: 2008-06-25
Also published as: WO2008074232A1

Abstract

A network system is provided with a plurality of coexisting wireless access systems, and includes: a first wireless system which contains a plurality of base stations supporting the first wireless accessing system, the base stations realizes the seamless converge within a certain region, and the first wireless system is used for connecting the users selecting the first wireless accessing system within the certain region to the network for providing the voice services; a second wireless system which contains one or a plurality of base stations supporting the second wireless accessing system, the base stations realizes the seamless converge within the local area of a certain region, and the second wireless system is used for connecting the users selecting the second wireless accessing system within the local area to the network for providing the data services.

Description

Network system with coexistence of multiple wireless access systems

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a network system with coexistence of multiple wireless access systems.

Background

The ultimate goal of the development of mobile communications is to enable communications to be achieved by anyone, anytime, anywhere, and to do so, the best solution proposed is to unify globally to one communication system. However, for various reasons, a unified communication system does not exist. Multi-system, multi-generation systems co-existing hybrid networking will occur and will exist for a considerable period of time.

In the development of mobile communication services, although data services are gradually increased, voice is still dominant, and for seamless coverage requirements of the whole network, voice services are also mainly targeted. For high-speed data services, such as high-speed data services exceeding the Mbps level, the coverage does not need full-network coverage, and if the high-speed data service requirement is met for the full-network coverage, the requirement on the deployment cost of network equipment is very expensive. How to solve the seamless coverage of voice service requirements, maximizing the capacity of hot spot data service requirements and meeting the performance optimization of different service requirements is the fundamental requirement in the field of mobile communication at present to realize the lowest network construction cost.

The total number of users of the GSM-system mobile network with the largest global scale is over 20 hundred million, and 690 mobile communication network operators in over 200 countries and regions operate GSM networks, and the subsequent development of the GSM networks is a hot spot including equipment operators and operators with common attention.

The global CDMA network is the second large-scale mobile communication network in the 2G era, and at present, many networks are developed to the next step to build CDMA1X, which is a hot spot of common attention of equipment and operators to support higher-speed data services in the future.

The industry GSM generally adopts WCDMA technology for subsequent evolution, and currently, there are over 50 countries and regions in the world, 105 network operators, which provide WCDMA commercial services, and adopt a GSM + WCDMA hybrid networking mode. Continuity of voice service is achieved through interoperation between WCDMA and GSM.

The GSM network mainly provides voice services and assists data services, and the coverage of the provided voice services is very perfect; the WCDMA system is the area covered by both voice service and data service, so that the voice service carrying capacity of WCDMA and the voice service carrying capacity of GSM are repeated in the area covered by both systems, and the complementarity between the two is not strong, resulting in very high cost.

Although 100 WCDMA networks are built globally at present and the investment of operator networks is huge, a profitable method is difficult to find in operation at present. In addition, because the data service rate provided by the existing WCDMA network carrying capacity is still not high, a higher rate technology needs to be introduced to solve the high capacity requirement in the hot spot. In a word, the existing GSM + WCDMA scheme has the defect that the investment cost is repeatedly built, and the requirement of the hotspot high-speed data service is difficult to meet.

Disclosure of Invention

The invention provides a network system with a plurality of wireless access systems coexisting, which aims to improve the complementarity of voice service and data and reduce the networking cost in the network system formed by a plurality of wireless networks.

A network system having coexistence of a plurality of wireless access systems, comprising:

the system comprises a first wireless system, a second wireless system and a third wireless system, wherein the first wireless system is provided with a plurality of base stations supporting a first wireless access mode, and the plurality of base stations realize continuous service coverage in a certain area and are used for accessing a user selecting the first wireless access mode in the certain area to a network to provide voice service;

and the second wireless system is provided with one or more base stations supporting a second wireless access mode, realizes continuous coverage in a local area in the certain area and is used for accessing a user of the second wireless access mode in the local area to a network to provide data service.

A network system having coexistence of a plurality of wireless access systems, comprising: a Long Term Evolution (LTE) system and other wireless systems with different wireless access systems adopted by the LTE system; wherein,

a plurality of base stations in the other wireless systems realize continuous coverage in a certain area, and are used for accessing users of the other wireless systems in the certain area to a network to provide voice services;

the base station of the long-term evolution system realizes continuous coverage in a local area in a certain area and is used for providing data services for users of the long-term evolution system in the local area.

A network system having coexistence of a plurality of wireless access systems, comprising: a WiMAX system and other wireless systems with different wireless access modes from those adopted by the WiMAX system; wherein,

and the base station of the WiMAX system realizes continuous coverage in a local area in the certain area and is used for providing data service for users of the WiMAX system in the local area.

A network system having coexistence of a plurality of wireless access systems, comprising: an air interface evolution AIE system and other wireless systems which are different from the wireless access system adopted by the AIE system; wherein,

and the base station of the AIE system realizes continuous coverage in a local area in the certain area and is used for providing data service for users of the AIE system in the local area.

The invention has the following beneficial effects:

the invention realizes data service coverage in the local area of the area for realizing voice service continuous coverage, fully considers the seamless coverage required by the voice service and maximizes the capacity required by the hot spot data service, improves the complementarity of the voice service and the data service in a network system on the basis of meeting the performance optimization of different service requirements, and realizes the requirement of minimizing the network construction cost.

Drawings

Fig. 1 is a schematic structural diagram of an independent LTE system in the prior art;

fig. 2 is a schematic structural diagram of a network system composed of a GSM system and an LTE system in the embodiment of the present invention;

fig. 3 is a schematic diagram of core network device independent devices in a network formed by a GSM system and an LTE system according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a core network device in a network formed by a GSM system and an LTE system according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a network system composed of a WiMAX system and a GSM system in the embodiment of the invention;

FIG. 6 is a schematic diagram of a network system composed of an AIE system and a CDMA system according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a core network of CDMA and AIE integrated in one embodiment of the present invention;

fig. 8 is a schematic structural diagram of centralized management of radio resources according to an embodiment of the present invention.

Detailed Description

In order to solve the contradiction between seamless coverage and high capacity requirement of hot spot, in this embodiment, under the condition of ensuring seamless coverage of voice service, according to the requirement of a local area (i.e. hot spot area) in the coverage area of voice service for high-speed data service, a network mainly providing high-speed data service is adopted to implement service coverage on the local area.

In this embodiment, the network system providing the voice service and the network system providing the high-speed service data may adopt one of a plurality of wireless networks of different wireless access systems. Typically, network systems providing voice services, such as GSM systems, CDMA systems, etc.; network systems providing high-speed data services, such as long term evolution LTE systems, WiMAX systems, air interface evolution AIE systems, and the like.

The 3GPP standard organization sets out that the development evolution route of a WCDMA system is WCDMA- > HSPA- > EHSPA- > LTE, and the LTE is the evolution direction of the WCDMA, which mainly aims to improve the competitiveness of a UMTS (including a WCDMA system and a CDMA2000 system) system in the future wireless communication market and meet the rapid development of various key communication technologies. The LTE system mainly provides high-speed data services, and provides benefits of reducing time delay, increasing user data rate, increasing system capacity and coverage, reducing cost of operators, and flexibly utilizing spectrum resources, compared with the WCDMA system.

Referring to fig. 1, an independent LTE system network is composed of an LTE base station BTS100 and an LTE access gateway AGW101, and the base stations 100 may interact with each other through an X2 interface. The LTE network bearing capacity aims to provide a downlink rate of 100Mbps and an uplink rate of 50Mbps, and has very strong capacity capability.

Fig. 2 shows a network system structure formed by mixing the LTE system and the GSM system in this embodiment. The GSM system comprises a base station BTS200, a base station controller BSC201 and a GSM core network 203; the LTE system includes a base station 210 and an access gateway AGW 211.

A plurality of base stations 200 in the GSM system realize continuous coverage in an area a, and a base station controller 201 controls and manages the base stations 200; GSM subscribers in area a access the GSM core network through base stations 200 and base station controllers 201. The GSM system mainly provides voice services to GSM subscribers in area a.

In the LTE system, the base station 210 implements service coverage in hot spot areas in the area a, that is, a local area a1 and a local area a2 (of course, three or more local areas may be used, or even only one local area may be used), and the access gateway 211 controls and manages the base station 210; LTE users of local area a1 and local area a2 access the access gateway 211 in the packet core network 213 through the base station 210. The LTE system mainly provides high-speed data services to LTE users in local areas a1, a 2.

There are many ways that base stations of GSM systems and LTE systems may be deployed in local area a1 and local area C. For example, the LTE base station and the GSM base station are separately configured to perform overlapping coverage; the LTE base station and the GSM base station are arranged in a co-station mode and cover the station together; a base station processing board card supporting LTE is directly inserted into the existing GSM network base station equipment; setting a new GSM + LTE dual-mode base station and the like. The base stations of the local areas a1 and a2 may adopt different deployment manners, for example, an LTE base station and a GSM base station are separately arranged in the local area a1, and a new GSM + LTE dual-mode base station is arranged in the local area a 2.

In the network system shown in fig. 2, the packet core network 213 and the GSM core network 203 are independent of each other and interoperate via the communication interface 204. If so, the GSM core network forwards the data service request to the LTE network for carrying; for another example, a unified RRM for radio resource management, QoS control, and maintenance function O & M, etc. are performed.

Fig. 3 is a simplified block diagram of a network system, in which base stations in four local areas respectively adopt different deployment modes (of course, all the base stations may adopt the same deployment mode, or local areas may be the same deployment mode, and some local areas are different deployment modes); the LTE core network and the GSM core network are mutually independent and carry out interoperation through a communication interface. In the network system, the current network GSM core network equipment can be upgraded, so that the upgraded GSM core network can realize the AGW interoperation function with the LTE system, and the unified RRM, QoS and O & M functions between the LTE system and the GSM system are supported. The interoperation meets a harmonious and unified resource management mechanism between two alternate systems, the network composition of different systems into the same network is realized, the interaction between core networks of the two systems can be realized aiming at the access request, the service distribution and the information identification of a terminal, the advantages of different wireless access systems are fully utilized, namely, a GSM network provides a voice service, an LTE network provides a high-speed wireless data service, the optimal bearing strategy of the service between the two systems is realized, and the complementarity is improved.

And the base station in the hot spot area carries different user services through a GSM network or an LTE network according to the service type initiated by the user equipment UE. When the service initiated by the GSM user is a voice service, the service request is forwarded to a core network of the GSM for the circuit switching voice service, the core network of the GSM directly manages the service request, and the service bearing is completed through the GSM network. When the service initiated by the GSM user is a data service of a packet domain, if the rate is lower, the request initiated by the user can be realized through the GSM network bearer, and the bearer for realizing the service can also be distributed to the LTE network bearer through the interoperation function between the GSM core network and the AGW; if the rate is higher, the GSM core network directly realizes the request initiated by the user through the LTE network load-bearing through the interoperation function between the GSM core network and the AGW.

Fig. 4 shows another network system structure of a mixed network of a GSM system and an LTE system in this embodiment, and is different from the network system shown in fig. 3, in the network system shown in fig. 4, a core network device 400 is a new GSM/LTE integrated core network device, and includes three parts, namely, an MSC functional entity 4000, a GSM packet domain entity 4001, and an LTE access gateway entity 4002. The MSC entity 4000 completes the circuit domain core network function of the GSM network, and is used for voice and circuit type data services, and the main functions include completing voice services and basic circuit type data bearer services, system roaming and switching between GSM and LTE, ensuring the security characteristics of the network, and supporting relocation between a GSM access network and an LTE base station. The GSM packet domain entity 4001 mainly performs the functions of GGSN and SGSN of GPRS, and the main functions include resource admission control, routing and forwarding functions, mobility management function, user data management function, logical link management function, and the like. The access gateway entity 4002 supports the core network access gateway function of LTE.

The GSM and LTE integrated core network shown in fig. 4 has the advantages of strong network capability, good system coordination, flexible deployment, simple architecture, convenient transplantation, unified and coordinated radio resource management, and the like.

By adopting the GSM system and LTE system fusion mode networking, high-speed data service can be borne on the access network equipment realized by the LTE technology according to different service request types initiated by the user terminal, and voice service can be borne on the GSM equipment. The networking mode also breaks through the gradual evolution steps according to GSM- > GPRS- > EDGE- > WCDMA- > HSPA- > EHSPA- > LTE, and realizes the complementation of voice service and data service by utilizing the capacity capability of LTE on the basis of depending on the perfect coverage capability of the existing GSM network. By adopting the new cross-generation networking mode, the problem of overhigh cost caused by the construction of a pure data network is avoided.

Fig. 5 shows a network system structure formed by mixing the WiMAX system and the GSM system in this embodiment. The GSM system includes a base station BTS500, a base station controller BSC501, and a GSM core network 512; the WiMAX system includes a base station BS510 and an access service network-gateway ASN-AGW 511.

A plurality of base stations 500 in the GSM system realize continuous coverage in the area M, and the base station controller 501 controls and manages the base stations 500; GSM subscribers in area M access the GSM core network 512 via the base station 500 and the base station controller 501. The GSM system mainly provides voice services to GSM users in region M.

The base station BS510 in the WiMAX system implements service coverage in a hot spot area in the area M, that is, a local area M1 (of course, two or more local areas may also be used), and the access service network-gateway 511 controls and manages the base station BS 510; WiMAX subscribers of local area M1 access a business network (e.g., the Internet) through base station 510 and access service network-gateway 511. The WiMAX system mainly provides high-speed data services to WiMAX users of the local area M1.

In the local area M1, the deployment of the base station BS in the WiMAX system and the base station in the GSM system may take various manners as described above.

In the network system shown in fig. 5, the base station controller 501 of the GSM system and the access service network-gateway ASN-GW of the WiMAX system are respectively accessed to an entity in the packet domain network to perform unified management on the WiMAX users and the GSM users, for example, the information of the WiMAX users and the GSM users is uniformly stored in the HSS, and the unified AAA server performs authentication, charging, and other processing on the WiMAX users and the GSM users, thereby ensuring the continuity of the WiMAX and GSM services and supporting mobility between WiMAX and GSM.

The networking mode of GSM + WiMAX can not only make full use of the characteristics of the existing GSM network that the coverage is perfect, but also can give full play to the high-speed data service capability of WiMAX.

Fig. 6 shows a network system structure in which the AIE system and the CDMA system are mixed in the present embodiment. Including a base station BTS600 of a CDMA system, a base station NodeB601 of an AIE system, a base station controller 602, and a core network 603.

A plurality of base stations 600 in the CDMA system implement continuous coverage in the area X, a base station 601 in the AIE system implements service coverage in a hot spot area in the area X, that is, a local area X1 (of course, two or more local areas may be used), and a base station controller and a core network device of the CDMA system and the AIE system are all integrated structures. As shown in fig. 7, the core network supporting CDMA and AIE integration includes: packet Data Serving node pdsn, mobile switching center MSC, service control point SCP, AAA server and home location register HLR. The information of CDMA user and AIE user is uniformly stored in HLR, and the AAA server can make uniform authentication and charging treatment for CDMA user and AIE user.

The CDMA system is mainly used for providing voice service for CDMA users in the area X; the AIE system uses advanced air interface technology in the base station part, and uses OFDM and MIMO technology in uplink and downlink, and can provide broadband mobile network data service with data rate up to 210Mbps in 20MHz bandwidth, so the AIE mainly provides data service to AIE users in local area X1. Because the core network devices are integrated, the message flows of the service requests initiated by users are the same no matter the service requests are voice services or data services, so that the voice services are mainly distributed to the CDMA base station to be carried in the system according to the types of the service requests, and the data services are carried to the AIE base station.

In the local area X1, the base stations in the AIE system and the base stations of the CDMA system may be deployed in various manners as described above.

The base station controller and the core network device of the CDMA system and the AIE system adopt an integrated structure, thereby easily realizing the unified management of the CDMA user and the AIE user and easily realizing the unified control and management of the wireless resources of the CDMA system and the AIE system. Of course, the corresponding base station controller and core network of the CDMA system and AIE system may also be set independently, and the core networks may interoperate through a communication interface, which is implemented in a manner similar to the network system shown in fig. 2.

The networking mode of FIG. 6 also breaks through the gradual evolution steps according to CDMA- > CDMA2000lx- > CDMA2000EV-DO- > CDMA2000EV-DV- > AIE, and jumps the EV-DO and EV-DV stages. By adopting the networking mode, the problem of seamless coverage of voice service requirements is fully considered, the capacity of hot spot data service requirements is maximized, and the requirement of lowest network construction cost can be realized on the basis of optimizing the performance of meeting different service requirements.

In the network systems of the above-mentioned various hybrid networks, when the core networks of different wireless systems are independently configured, the wireless resources of the multi-system communication network may be managed by configuring a Centralized Radio Resource Management (CRRM) unit. One implementation in this embodiment is shown in fig. 8. The CRRM unit is connected to the radio resource management unit 1 and the radio resource management unit 2 (not limited to 2 radio resource management units, for example, 3 or more), and the radio resource management units 1 and 2 are units for performing radio resource management in a single-mode communication network, respectively, and configured to report radio resource information (the radio resource information may be load information, cell information, radio parameters, access parameters, and the like) of each single-mode communication network, such as BSC in GSM and AGW in LTE, to the CRRM unit. The CRRM unit is used for uniformly managing the wireless resources of the multi-system communication network according to the wireless resource information reported by the wireless resource management unit; the CRRM performs interface adaptation on the information of various wireless access modes, namely, the information reported by the wireless resource management units of various wireless access modes is converted into a format which can be identified, and the issued information is converted into a format which can be identified by the wireless resource management unit of the corresponding wireless access mode; the CRRM unit may be an independent physical entity newly added in the multi-system communication network, or may be a logical functional entity, and is combined with an existing network element in the multi-system communication network. The unified management of radio resources that the CRRM can implement may include centralized load control, centralized power control, centralized handover control, etc. In addition, in order to utilize the radio resource information reported by each single-mode communication network in the multi-mode communication network to the maximum extent and perform unified radio resource management on the multi-mode communication network, the CRRM optimizes the radio resources of the whole multi-mode communication network according to the received radio resource information, for example, the CRRM configures and adjusts the relevant parameters of the radio resources of each mode communication network according to the configured optimization algorithm and the radio resource information, thereby realizing the optimization of the multi-mode communication network.

By adopting the hybrid networking and similar networking modes, the requirement of lowest network construction cost can be met on the premise of meeting seamless coverage of voice service requirements, maximizing hot spot data service requirement capacity and meeting performance optimization of different service requirements.

Take a typical urban GSM network as an example: the GSM network now has 1000 sites of GSM base station, supporting 800 ten thousand users in network capacity. At present, the voice traffic accounts for 95% of the network, the data traffic is 5%, and it is assumed that the voice traffic only accounts for 70% in the next 5 years, and the data traffic is increased by 30%. In order to meet this future market demand. The traditional evolution mode in the industry is a mixed networking mode of building GSM + WCDMA, considering that the coverage capability of WCDMA is weaker than that of GSM, the investment of the WCDMA network is estimated to build more than 1000 base station scales, and the continuous coverage of WCDMA is realized. If the GSM + LTE networking scheme is adopted, only a small number of LTE base stations need to be built for hot spots with data service requirements, and the number of the base stations is approximately between 200 and 300. Therefore, the situation that the voice service bearing capacity of the WCDMA network after being built is repeated with the voice bearing capacity of the existing GSM network is avoided, huge investment expenditure is saved, and the network building cost is greatly reduced.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A network system having coexistence of a plurality of radio access systems, comprising:

the system comprises a first wireless system, a second wireless system and a third wireless system, wherein the first wireless system is provided with a plurality of base stations supporting a first wireless access mode, and the plurality of base stations realize continuous coverage in a certain area and are used for accessing a user selecting the first wireless access mode in the certain area to a network to provide voice service;

2. The network system according to claim 1, wherein the base station in the first wireless system is provided independently of the base station in the second wireless system; or the base station in the second wireless system and the base station in the first wireless system are arranged in a co-station mode; or the base station in the second wireless system is embedded in the base station in the first wireless system; or the base station of the partial area is a dual-mode base station supporting a first wireless access system and a second wireless system.

3. The network system of claim 1 wherein the network system has an entity for centrally managing radio resources, the entity uniformly managing radio resources of the first radio system and the second radio system.

4. The network system according to any of claims 1 to 3, wherein the core networks of the first wireless system and the second wireless system are independent from each other and interoperate through an interface; or the core network of the first wireless system and the core network of the second wireless system are integrated.

5. A network system with a plurality of wireless access systems coexisting is characterized by comprising a Long Term Evolution (LTE) system and other wireless systems which are different from the wireless access systems adopted by the LTE system; wherein,

6. The network system according to claim 5, wherein the base station in the long term evolution system is provided independently of the base station in the other wireless system; or the base station in the long term evolution system and the base station in the other wireless system are arranged in a co-station mode; or, the base station of the long term evolution system is embedded in the base station of the other wireless system; or the base station of the partial area is a dual-mode base station supporting the wireless access mode adopted by the long-term evolution system and the wireless access mode adopted by the other wireless system.

7. The network system of claim 5 wherein the network system has an entity for centrally managing radio resources, and the entity manages radio resources of the LTE system and the other radio systems in a unified manner.

8. The network system according to any of claims 5 to 7, wherein the long term evolution system is independent of the core network of the other wireless system and interoperates over an interface; or, the long term evolution system and the core network of the other wireless system are in an integrated structure.

9. The network system of claim 5, wherein the other network system is a GSM system.

10. A network system with a plurality of wireless access systems coexisting is characterized by comprising a WiMAX system and other wireless systems which are different from the wireless access systems adopted by the WiMAX system; wherein,

11. The network system of claim 10, wherein the base station in the WiMAX system is provided independently from the base station in the other wireless system; or, the base station in the WiMAX system and the base station in the other wireless system are arranged in a co-station mode; or, the base station of the WiMAX system is embedded into the base station of the other wireless system; or, the base station in the partial area is a dual-mode base station supporting the wireless access mode adopted by the WiMAX system and the wireless access mode adopted by the other wireless system.

12. The network system of claim 10, wherein the network system has an entity for centrally managing radio resources, and the entity manages the radio resources of the WiMAX system and the other radio systems in a unified manner.

13. The network system according to any one of claims 10 to 12, wherein the WiMAX system is independent from the core network of the other wireless system and interoperates through an interface; or, the WiMAX system and the core network of the other wireless system are integrated into a whole.

14. The network system of claim 10, wherein the other network system is a GSM system.

15. A network system with coexistence of multiple wireless access systems is characterized by comprising an air interface evolution AIE system and other wireless systems which are different from the wireless access systems adopted by the AIE system; wherein,

16. The network system according to claim 15, wherein the base station in the AIE system is provided independently of the base station in the other wireless system; or the base station in the AIE system and the base station in the other wireless system are arranged in a co-sited mode; or, the base station of the AIE system is embedded in the base station of the other wireless system; or the base station of the partial area is a dual-mode base station supporting the wireless access mode adopted by the AIE system and the wireless access mode adopted by the other wireless system.

17. The network system of claim 15 wherein said network system has an entity for centrally managing radio resources, said entity uniformly managing radio resources of said AIE system and said other radio systems.

18. The network system according to any of claims 15 to 17, wherein said AIE system is independent of the core network of said other wireless system and interoperates over an interface; or, the AIE system and the core network of the other wireless system are integrated into a whole.

19. The network system of claim 15, wherein the other network system is a CDMA system.