CN106559798A - A kind of radio relay method, radio repeater station and wireless relay system - Google Patents

Abstract

The invention discloses a wireless relay method, a wireless relay station and a wireless relay system, and relates to the technical field of wireless communication. The method includes: a host base station accessed by the terminal part of the wireless relay station, establishing the base station part of the wireless relay station and the host base station used by it The communication link between the core networks; the terminal part of the wireless relay station uses the established communication link to forward the downlink data sent by the core network used by the base station part of the wireless relay station to the base station part of the wireless relay station; the terminal part of the wireless relay station uses the The established communication link forwards the uplink data sent by the base station part of the wireless relay station to the core network used by the base station part of the wireless relay station. The present invention realizes the relay function without affecting the operation state of the existing network, reduces the influence on the operation of the existing network, and greatly improves the wireless coverage, so that the operator can quickly and flexibly realize the relay network, reducing the network operating costs.

Description

A wireless relay method, wireless relay station and wireless relay system

technical field

The invention relates to the technical field of wireless communication, in particular to a wireless relay method, a wireless relay station and a wireless relay system.

Background technique

With the popularization of smart terminals and the rapid development of mobile Internet and other technologies, the coverage requirements for wireless communication signals are becoming more and more extensive. In order to expand the coverage of wireless signals, for the scenario where base station ground transmission is difficult to deploy, repeaters are used in the second-generation mobile communication technology (2nd-Generation, 2G)/third-generation mobile communication technology (3rd-Generation, 3G) The coverage of wireless signals is enhanced, and microwave and other networking are used to expand the deployment range of base stations in the part of ground transmission resources. , 3GPP) standard organization proposes a relay scheme for wireless signals. Repeater technology not only amplifies wireless signals, but also amplifies signal noise. In certain environments such as islands, microwaves are limited by climate and obstacles between microwaves, and their deployment is very limited in some scenarios.

The wireless relay scheme proposed by 3GPP adopts the Long Term Evolution (LTE) wireless signal as the networking mode of the transmission backhaul link. In this networking mode, the evolved NodeB (eNB) implements the Donor Base Station (Donor eNB, DeNB) functions, and a relay node (Relay Node, RN) is a cell where a relay station accesses a DeNB. The RN provides the access coverage function for the terminal user, so as to expand the coverage of the DeNB, and can expand the wireless coverage at a lower cost.

However, for the relay (Relay) architecture of the 3GPP standard, it involves adding the Relay function to the common eNB that has been put into commercial use in the existing network to transform it into a DeNB. At the same time, it is necessary to add a new network element RN, so that The entire network version is upgraded to support the relay function, which not only increases the operator's operating costs, but also prolongs the time required for network deployment.

Contents of the invention

The purpose of the present invention is to provide a wireless relay method, a wireless relay station and a wireless relay system, which can better avoid the impact of wireless relay deployment on the existing network.

According to one aspect of the present invention, a wireless relay method is provided, including:

The terminal part of the wireless relay station establishes a communication link between the base station part of the wireless relay station and the core network used by it via its accessed host base station;

The terminal part of the wireless relay station uses the established communication link to forward the downlink data sent by the core network used by the base station part of the wireless relay station to the base station part of the wireless relay station;

The terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the core network used by the base station part of the wireless relay station.

Preferably, the step of establishing a communication link between the wireless relay station base station part and the core network used by the wireless relay station terminal part via the host base station accessed by it includes:

The terminal part of the wireless relay station establishes a dedicated bearer between it and the core network used by the donor base station;

The terminal part of the wireless relay station uses the dedicated bearer to establish a communication link between the base station part of the wireless relay station and the core network used by the base station part of the wireless relay station.

Preferably, the step of establishing a dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station includes:

The terminal part of the wireless relay station establishes multiple dedicated bearers with different quality of service priorities with the core network used by the donor base station by initiating multiple dedicated bearer establishment requests to the core network used by the donor base station.

Preferably, when the core network used by the base station part of the wireless relay station and the core network used by the donor base station are the same core network, the uplink data sent by the base station part of the wireless relay station is forwarded to the core network used by the base station part of the wireless relay station The steps of the net include:

The terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the PGW of the core network used by the donor base station, and the PGW of the core network used by the donor base station according to the The type of uplink data, forwarding the uplink data to corresponding network elements of the core network.

Preferably, the step of forwarding the uplink data to corresponding network elements of the core network by the PGW of the core network used by the donor base station according to the type of the uplink data includes:

The PGW of the core network used by the donor base station determines whether the uplink data is control plane data or user plane data;

If the PGW of the core network used by the donor base station judges that the uplink data is control plane data, forward the control plane data to the MME of the core network;

If the PGW of the core network used by the donor base station determines that the uplink data is user plane data, forward the user plane data to the SGW of the core network.

Preferably, when the core network used by the base station part of the wireless relay station and the core network used by the host base station are different core networks, the uplink data sent by the base station part of the wireless relay station is forwarded to the core network used by the base station part of the wireless relay station The steps of the net include:

The terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the core network used by the donor base station, and the core network used by the donor base station directly forwards the uplink data To the core network used by the base station part of the wireless relay station.

Preferably, it also includes:

By using the base station of the wireless relay station as a new donor base station, other wireless relay stations are connected to the wireless cell of the new donor base station.

According to another aspect of the present invention, a wireless relay station is provided, including a wireless relay station terminal part and a wireless relay station base station part, wherein the wireless relay station terminal part includes:

The link establishment unit is used to establish a communication link between the base station part of the wireless relay station and the core network used by the host base station;

A data transmission unit, configured to use the established communication link to forward the downlink data sent by the core network to the base station part of the wireless relay station, and forward the uplink data sent by the base station part of the wireless relay station to the core network .

Preferably, the link establishment unit includes:

A quality of service control module, configured to establish a dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station;

The base station data agent forwarding module is configured to use the dedicated bearer to establish a communication link between the base station part of the wireless relay station and the core network used by the base station part of the wireless relay station.

Preferably, the quality of service control module establishes multiple dedicated bearers with different quality of service priorities with the core network used by the donor base station by initiating multiple dedicated bearer establishment requests to the core network used by the donor base station.

Preferably, the base station of the wireless relay station serves as a new master base station and connects other wireless relay stations to the wireless cell covered by it.

According to another aspect of the present invention, a wireless relay system is provided, including a donor base station and the foregoing wireless relay station.

Preferably, it also includes:

The core network used by the base station part of the wireless relay station and the core network used by the host base station;

Wherein, when the core network used by the base station part of the wireless relay station and the core network used by the host base station are the same core network, the core network forwards the uplink data to the corresponding network element;

Wherein, when the core network used by the wireless relay station base station part and the core network used by the host base station are different core networks, the core network used by the host base station directly forwards the uplink data forwarded by the host base station to the wireless relay station base station Part of the core network used.

Preferably, the core network used by the base station part of the wireless relay station and the core network used by the host base station are the same core network, and the core network includes a PDN gateway PGW, a mobility management entity MME, and a serving gateway SGW, wherein:

The PGW is used to determine whether the uplink data is control plane data or user plane data, and if the PGW of the core network used by the host base station determines that the uplink data is control plane data, forward the control plane data to the core If the PGW of the core network used by the host base station determines that the uplink data is user plane data, the MME of the network forwards the user plane data to the SGW of the core network.

Compared with the prior art, the beneficial effects of the present invention are:

1. The present invention provides the need not to upgrade the eNB of the existing network to a DeNB, and realizes the Relay function of LTE without affecting the operation state of the existing network, which greatly reduces the impact on the operation of the existing network, and greatly improves the wireless coverage, so that Operators can quickly and flexibly implement Relay networking, which reduces the cost of networking operations;

2. The host base station and wireless relay station of the present invention can adopt different wireless standards, and can also support multi-level relay and provide QoS guarantee function, which greatly reduces the implementation difficulty and cost of LTE wireless network supporting wireless relay, and improves the competitiveness of operators .

Description of drawings

FIG. 1 is a functional block diagram of a wireless relay method provided by an embodiment of the present invention;

FIG. 2 is a first schematic diagram of a composition model of a wireless relay station provided by an embodiment of the present invention;

FIG. 3 is a second schematic diagram of a composition model of a wireless relay station provided by an embodiment of the present invention;

FIG. 4 is a partial block diagram of a wireless relay station terminal provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a dedicated bearer established by a wireless relay provided by an embodiment of the present invention;

FIG. 6 is a network architecture diagram of a wireless relay system provided in Embodiment 1 of the present invention;

Fig. 7 is a working flowchart of the wireless relay system provided by Embodiment 1 of the present invention;

8 is a network architecture diagram of a wireless relay system when the wireless relay station and the host base station use different LTE core networks according to Embodiment 2 of the present invention;

FIG. 9 is a network architecture diagram of a wireless relay system under different wireless standards provided by Embodiment 3 of the present invention;

Fig. 10 is a working flowchart of a wireless relay system under different wireless standards provided by Embodiment 3 of the present invention;

FIG. 11 is an architecture diagram of a multi-level wireless relay system corresponding to Embodiment 4 of the present invention.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Fig. 1 is a functional block diagram of a wireless relay method provided by an embodiment of the present invention, as shown in Fig. 1, the steps include:

Step S101: The terminal part of the wireless relay station establishes a communication link between the base station part of the wireless relay station and the core network used by it through the host base station which it accesses.

Specifically, establishing a dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station, and using the dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station to establish the A communication link between the base station part of the wireless relay station and the core network used by the base station part of the wireless relay station.

Wherein, the terminal part of the wireless relay station establishes multiple dedicated bearers with different quality of service priorities with the core network used by the donor base station by initiating multiple dedicated bearer establishment requests to the core network used by the donor base station.

Step S102: The terminal part of the wireless relay station uses the established communication link to forward the downlink data sent by the core network used by the base station part of the wireless relay station to the base station part of the wireless relay station, and forwards the data sent by the base station part of the wireless relay station to the base station part of the wireless relay station. The uplink data is forwarded to the core network used by the base station part of the wireless relay station.

When the core network used by the donor base station and the core network used by the wireless relay station are the same core network, the terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the The PGW of the core network used by the host base station forwards the uplink data to the corresponding network element of the core network according to the type of the uplink data, that is, the PGW of the core network used by the host base station The PGW of the core network judges that the uplink data is control plane data or user plane data, and if the PGW of the core network used by the host base station judges that the uplink data is control plane data, forward the control plane data to the core If the PGW of the core network used by the host base station determines that the uplink data is user plane data, the MME of the network forwards the user plane data to the SGW of the core network.

When the core network used by the donor base station and the core network used by the wireless relay station are different core networks, the terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the The core network used by the host base station, the core network used by the host base station directly forwards the uplink data to the core network used by the wireless relay station.

Further, the present invention also provides a wireless relay station, including a wireless relay station terminal part (that is, a UE part) and a wireless relay station base station part. The UE part and the base station part of the wireless relay station can be separated or integrated together. FIG. 3 is the present invention The first schematic diagram of the composition model of the wireless relay station provided by the embodiment of the invention, as shown in FIG. 3 , the base station part and the UE part of the wireless relay station adopt an integrated mode. FIG. 4 is a second schematic diagram of a composition model of a wireless relay station provided by an embodiment of the present invention. As shown in FIG. 4 , the base station part and the UE part of the wireless relay station adopt a separate mode. Among them, in addition to the radio frequency processing module, the baseband processing module and the UE main control module, the UE part further includes the UE proxy base station data forwarding module (hereinafter referred to as the base station data proxy forwarding module, which has proxy transmission function), wireless relay quality of service (Quality of Service, QoS) control module (hereinafter referred to as the service quality control module); the base station part includes a base station radio frequency processing module, a base station baseband processing module and a base station main control module. The base station part of the wireless relay station can be Long Term Evolution-Frequency Division Duplexing (Long Term Evolution-Frequency Division Duplexing, LTE-FDD), Long Term Evolution-Time Division Duplexing (Long Term Evolution-Time Division Duplexing, LTE-TDD) or general mobile Communication systems (Universal Mobile Telecommunications System, UMTS), Global System for Mobile Communications (Global System for Mobile Communication, GSM) and other different wireless standards.

FIG. 4 is a partial block diagram of a wireless relay station terminal provided by an embodiment of the present invention. As shown in FIG. 4 , it includes a link establishment unit 10 and a data transmission unit 20 .

The link establishment unit 10 is used for establishing a communication link between the base station part of the wireless relay station and the core network used by the base station via the donor base station. The function of the link establishment unit 10 can be realized by the quality of service control module and the base station data agent forwarding module, specifically, the quality of service control module establishes a dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station, Then the base station data agent forwarding module uses the dedicated bearer between the wireless relay station terminal part and the core network used by the host base station to establish a communication link between the wireless relay station base station part and the core network used by the wireless relay station base station part . Wherein, the quality of service control module establishes multiple dedicated bearers with different quality of service priorities between the core network used by the donor base station and the core network used by the donor base station by initiating multiple dedicated bearer establishment requests to the core network used by the donor base station.

The data transmission unit 20 is configured to use the established communication link to forward the downlink data sent by the core network to the base station part of the wireless relay station, and forward the uplink data sent by the base station part of the wireless relay station to the core network . The function of the data transmission unit 20 can be realized by the base station data agent forwarding module.

That is to say, the UE part of the wireless relay station performs proxy forwarding of the base station data of the base station part. The proxy forwarding means that the UE part of the wireless relay station forwards the base station data of the base station part of the wireless relay station according to the pre-configured QoS policy. Furthermore, when the UE part of the wireless relay station accesses the cell of the host base station and obtains an IP address from the core network, the wireless relay station configures the IP address as the service IP address of the base station part of the wireless relay station. The base station part of the wireless relay station uses the service IP address to communicate with other LTE network elements through the UE part of the wireless relay station. The UE part realizes the QoS control of the wireless relay data, and the whole wireless relay system has QoS capability through the QoS control mechanism of the wireless relay station. For the data sent by the core network to the base station of the wireless relay station through the host base station, the UE part transparently forwards it to the base station part; for the data sent by the base station part to the core network, the UE part transparently forwards it to the host base station, and then the host base station sends it to the core network.

The workflow is as follows:

Step 1: After the wireless relay station is powered on, the UE part of the wireless relay station accesses the wireless cell of the donor base station.

Step 2: The wireless relay station UE part initiates the QoS control process, and the QoS control module triggers the establishment of multiple dedicated bearers with different QoS priorities. The dedicated bearers with different priorities can be different planes of the wireless relay station base station (including the control plane/ User plane/management plane and other planes) data streams provide services, and can also provide services for IP data streams with different characteristics. Each dedicated bearer is composed of a radio bearer (RadioBearer) and an S1 bearer (S1 Bearer).

Step 3: The base station part of the wireless relay station sends an S1 connection establishment request (that is, a dedicated bearer establishment request) through the UE part, and the base station data agent forwarding module of the UE part maps the S1 connection establishment request data sent by the base station part to the dedicated bearer corresponding to the designated QoS. On the bearer, an S1 connection establishment request is initiated to an existing network Mobility Management Entity (MME), and the S1 connection establishment is completed.

Step 4: The base station of the wireless relay station partially completes the establishment of the cell, and transmits broadcast and pilot signals to the outside through a remote radio unit (RemoteRadio Unite, RRU).

Step 5: UE users access the wireless cell of the wireless relay station, and the related service data is composed of S1 user plane data by the base station of the wireless relay station, and then transmitted to the UE part of the wireless relay station, and the UE part maps the data flow to the dedicated QoS attribute corresponding to the specified On the bearer, send to the core network. In this way, mobile communication services such as data services or voice calls can be performed.

Fig. 5 is a schematic diagram of a dedicated bearer established by the wireless relay provided by the embodiment of the present invention. As shown in Fig. 5, the UE part of the wireless relay station initiates the QoS control process, specifically, the QoS control module of the UE part triggers the establishment of the wireless relay station and the service gateway The dedicated bearer between (Serving GateWay, SGW)/PDN gateway (Packet DataNetwork GateWay, PGW), the established dedicated bearer is composed of radio bearer and S1 bearer.

In the existing technology, it is complicated to add the Relay function to common LTE eNBs. In particular, changing the relevant base stations in the commercial LTE network to support the Relay function requires version upgrades, wireless optimization, etc., which greatly increases operating costs. In order to solve the impact of Relay deployment on the existing network and reduce Relay operation costs, the present invention provides the above wireless relay technical solution, without upgrading the host base station, and can realize multi-level relay and QoS control.

Further, the present invention also provides a wireless relay system, and the wireless relay system includes the above wireless relay station and a donor base station. Wherein, the host base station uses a common base station that has been deployed in the existing network, and the wireless relay station includes a UE part of the wireless relay station and a base station part of the wireless relay station. The present invention will be further described below in conjunction with FIGS. 6-11 .

FIG. 6 is a network architecture diagram of the wireless relay system provided by Embodiment 1 of the present invention. As shown in FIG. 6 , the SGW/PGW is deployed as a network element when the wireless relay station and the host base station adopt a common core network deployment.

After the wireless relay station is powered on, the UE part of the wireless relay station accesses the cell of the donor base station, and then the UE part of the wireless relay station initiates a QoS control process to complete the establishment of a dedicated bearer. The QoS control module of the UE part of the wireless relay station can establish different dedicated bearers for different data streams of the base station part of the wireless relay station. Then the base station part of the wireless relay station maps the base station data to a specific QoS dedicated bearer and transmits it to the core network through the base station data proxy forwarding module and QoS control module of the UE part according to the QoS characteristics of the data flow, establishes an S1 connection with the MME, and finally completes the wireless intermediary Following the establishment of the cell, wireless services are provided for the UE.

Fig. 7 is a working flow diagram of the wireless relay system provided by Embodiment 1 of the present invention. As shown in Fig. 7, the steps include:

Step 201: The wireless relay station is powered on.

Step 202: The UE part of the wireless relay station searches for the cell of the donor base station, and accesses the cell of the donor base station. After the access is completed, the UE part of the wireless relay station obtains the IP address assigned by the network element PGW of the core network.

Step 203: The UE part of the wireless relay station sends a bearer resource establishment request message (Request Bearer Resource Modification) to the MME according to the configured QoS control strategy, and triggers the MME to initiate a dedicated bearer establishment process.

Step 204: The UE part in the wireless relay sets up multiple dedicated bearers with different QoS levels by triggering the dedicated bearer establishment process described in step 203 multiple times.

Step 205: The wireless relay station uses the IP address assigned by the core network as the service IP of the base station part, and the base station part of the wireless relay station uses this IP address to initiate a S1 control plane link establishment request, and the QoS control module of the UE part of the wireless relay station sends the data (ie S1 The control plane link establishment request message) is mapped to a dedicated bearer with a specific QoS attribute, and the S1 control plane link establishment request message is transmitted to the host base station through the base station data proxy forwarding module of the UE part, and then the host base station passes the S1 of the host base station The user plane link sends the S1 control plane link establishment request message initiated by the base station of the wireless relay station to the network element SGW/PGW of the core network, and the message format is the GTP-U message format.

Step 206: The core network element SGW/PGW receives the GTP-U message forwarded by the host base station, extracts the S1 control plane link establishment request message of the base station part of the wireless relay station, and forwards it to the network element MME.

Step 207: The MME responds to the S1 control plane link establishment request message from the base station part of the wireless relay station, and forwards the S1 control plane link establishment response message to the SGW/PGW.

Step 208: SGW/PGW encapsulates the S1 control plane link establishment response message into a GTP-U message, sends it to the host base station, and forwards it to the wireless relay station by the host base station

Step 209: The wireless relay station UE part forwards the S1 control plane link establishment response message to the base station part, and then the wireless relay station establishes a cell.

Step 210: the UE user accesses the cell of the wireless relay station.

Step 211: UE user initiates a wireless service.

Step 212: The wireless service data of the UE user is mapped by the wireless relay station to a dedicated bearer with specified QoS and forwarded to the SGW/PGW.

Step 213: The SGW/PGW forwards the wireless service data of the UE user to the service server, thereby completing the wireless service of the UE.

It should be noted that, for the core network used by the base station part of the wireless relay station and the host base station, a common core network mode or a different core network mode may be used. Among them, if the LTE standard shown in Embodiment 1 is adopted, that is, the common core network, that is, the base station part of the wireless relay station and the host base station use the same set of core network for communication, then the core network element SGW/PGW needs to add relevant configurations , to ensure that the data processed by the PGW is processed again. The specific processing process is: if the data processed by the PGW is the control plane data of the base station part of the wireless relay station, it needs to be forwarded to the network element MME of the core network; if the data processed by the PGW is the user plane data of the base station part of the wireless relay station, it needs to be forwarded to the core network element SGW, but when the core network element SGW/PGW is deployed as a network element, as shown in FIG. 6 , the processing process can be completed inside the network element.

The base station part of the wireless relay station in Embodiment 1 takes the LTE wireless system as an example. The base station part of the wireless relay station may also be a base station of other standards. The working process is basically the same as the process described below, and the specific part of the message may be different.

FIG. 8 is a network architecture diagram of the wireless relay system when the wireless relay station and the host base station use different LTE core networks in Embodiment 2 of the present invention. As shown in FIG. 8 , the specific working process is similar to Embodiment 1 shown in FIGS. 6 and 7 . The difference is that, for uplink, the terminal part of the wireless relay station forwards the uplink data sent by the base station part of the wireless relay station to the core network used by the host base station, and the core network used by the host base station directly forwards the uplink data to the core network used by the wireless relay station. For the downlink, the core network used by the wireless relay station sends the downlink data to the core network used by the host base station, and the core network used by the host base station forwards the downlink data to the terminal part of the wireless relay station via the host base station, and then the terminal part of the wireless relay station sends the downlink data to the The base station part of the wireless relay station.

The wireless relay station of the present invention can also use different wireless systems from the host base station. Figure 9 is a network architecture diagram of the wireless relay system under different wireless standards provided by Embodiment 3 of the present invention. As shown in Figure 9, the master base station is used as the LTE base station, and the UE part of the wireless relay station can access the LTE network, and the base station part of the wireless relay station Taking the UMTS base station as an example, the working principle of the wireless relay station is further described.

Fig. 10 is a working flowchart of the wireless relay system under different wireless standards provided by Embodiment 3 of the present invention. As shown in Fig. 10, the steps include:

Step 301: The wireless relay station is powered on.

Step 302: The UE part of the wireless relay station searches for the cell of the donor base station and accesses the cell of the donor base station. After the access is completed, the UE part of the wireless relay station obtains the IP address assigned by the core network element PGW.

Step 303: The wireless relay station UE part (LTE system) initiates a QoS control process to the MME according to the configured QoS control strategy, and triggers the MME to establish dedicated bearers with different QoS attributes.

Step 304: The UE part of the wireless relay station establishes multiple dedicated bearers with different QoS levels by triggering the dedicated bearer establishment process described in step 303 multiple times.

Step 305: the wireless relay station uses the IP address allocated by the core network as the service IP of the base station part, and the wireless relay station base station part (UMTS wireless system) adopts the IP address to initiate an Iub control plane link establishment request, and the base station data proxy of the wireless relay station UE part The forwarding module transmits the Iub control plane link establishment request message to the host base station, and then the host base station passes the Iub control plane link establishment request initiated by the wireless relay station base station part through the S1 user plane link (ie S1-U) of the host base station. The message is sent to the core network element SGW/PGW, and the message format is GTP-U message format.

Step 306: The core network element SGW/PGW receives the GTP-U message forwarded by the host base station, extracts the Iub control plane link establishment request message of the base station part of the wireless relay station, and forwards it to the core network element wireless of the UMTS standard. Network Controller (Radio Network Controller, RNC).

Step 307: The RNC responds to the Iub control plane link establishment request message of the base station part of the wireless relay station, and forwards the Iub control plane link establishment response message to the SGW/PGW.

Step 308: SGW/PGW encapsulates the Iub control plane link establishment response message into a GTP-U message, sends it to the host base station, and forwards it to the wireless relay station by the host base station.

Step 309: The wireless relay station UE part forwards the Iub control plane link establishment response message to the base station part, and then the wireless relay station establishes a cell.

Step 310: UE accesses the cell of the wireless relay station.

Step 311: the UE initiates a wireless service to the wireless relay station.

Step 312: the wireless relay station maps the wireless service data of the UE to a dedicated bearer with specified QoS attributes, and forwards the data to the SGW/PGW.

Step 313: the SGW/PGW forwards the UE's wireless service data to the RNC, so as to complete the UE's wireless service.

The wireless relay station in the present invention can also be applied to multi-level wireless relay scenarios without modifying any architecture and design of the host base station and the wireless relay station, only needing to continue to deploy the wireless relay station in the cell of the wireless relay station. Fig. 11 is an architecture diagram of a multi-level wireless relay system corresponding to Embodiment 4 of the present invention. As shown in Fig. 11 , eNB represents a host base station, Relay1 represents a first-level wireless relay station, and Relay2 represents a second-level wireless relay station. Multi-level wireless relay stations Different wireless systems may be used by the host base station and the host base station.

The working process of the multi-level wireless relay system is as follows:

Step 1: After the host base station eNB completes the establishment of the cell, the first-level wireless relay station Relay1 is powered on, and accesses the LTE network according to the working process of the wireless relay station in Embodiment 1.

Step 2: The second-level wireless relay station Relay2 is within the coverage of the first-level wireless relay station Relay1 cell. After power-on, the second-level wireless relay station Relay2UE part is connected to the first-level wireless relay station according to the process introduced in Embodiment 1. In the cell of relay station Relay1.

Step 3: The UE located in the cell of the second-level wireless relay station Relay2 accesses the cell of the second-level wireless relay station Relay2 and initiates a service, thereby realizing the function of providing wireless services in a multi-level wireless relay environment.

In fact, the first-level wireless relay station Relay1 is used as a new host base station, and the second-level wireless relay station Relay2 is connected to the wireless cell covered by the first-level wireless relay station Relay1 to realize multi-level wireless relay.

The above-mentioned embodiments are described in order to illustrate the invention, and those skilled in the art will appreciate that various improvements, additions and substitutions are possible, and therefore, the scope of the present invention should not be limited to the above-mentioned embodiments.

In summary, the present invention has the following technical effects:

The present invention aims at the present situation that 3GPP's Relay deployment will transform the existing network, and provides a new wireless relay method and system, without upgrading the eNB of the existing network to a DeNB, which can be used without affecting the operating state of the existing network. Realize the relay function of LTE, and the master base station and the relay station can adopt different wireless standards, and can also support multi-level relay.

Although the present invention has been described in detail above, the present invention is not limited thereto, and various modifications can be made by those skilled in the art based on the principle of the present invention. Therefore, any modifications made according to the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims (14)

1. A wireless relay method, characterized in that, comprising: The terminal part of the wireless relay station establishes a communication link between the base station part of the wireless relay station and the core network used by it via its accessed host base station; The terminal part of the wireless relay station uses the established communication link to forward the downlink data sent by the core network used by the base station part of the wireless relay station to the base station part of the wireless relay station; The terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the core network used by the base station part of the wireless relay station. 2. The method according to claim 1, wherein the step of establishing a communication link between the wireless relay station base station part and the core network used by the wireless relay station terminal part via the host base station accessed by the wireless relay station terminal part comprises: The terminal part of the wireless relay station establishes a dedicated bearer between it and the core network used by the donor base station; The terminal part of the wireless relay station uses the dedicated bearer to establish a communication link between the base station part of the wireless relay station and the core network used by the base station part of the wireless relay station. 3. The method according to claim 2, wherein the step of establishing a dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station comprises: The terminal part of the wireless relay station establishes multiple dedicated bearers with different quality of service priorities with the core network used by the donor base station by initiating multiple dedicated bearer establishment requests to the core network used by the donor base station. 4. The method according to claim 2 or 3, wherein when the core network used by the base station part of the wireless relay station and the core network used by the host base station are the same core network, the base station part of the wireless relay station The step of forwarding the sent uplink data to the core network used by the base station part of the wireless relay station includes: The terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the PGW of the core network used by the donor base station, and the PGW of the core network used by the donor base station according to the The type of uplink data, forwarding the uplink data to corresponding network elements of the core network. 5. The method according to claim 4, wherein the step of forwarding the uplink data to a corresponding network element of the core network by the PGW of the core network used by the host base station according to the type of the uplink data includes : The PGW of the core network used by the donor base station determines whether the uplink data is control plane data or user plane data; If the PGW of the core network used by the donor base station judges that the uplink data is control plane data, forward the control plane data to the MME of the core network; If the PGW of the core network used by the donor base station determines that the uplink data is user plane data, forward the user plane data to the SGW of the core network. 6. The method according to claim 2 or 3, wherein when the core network used by the base station part of the wireless relay station and the core network used by the host base station are different core networks, the base station part of the wireless relay station The step of forwarding the sent uplink data to the core network used by the base station part of the wireless relay station includes: The terminal part of the wireless relay station uses the established communication link to forward the uplink data sent by the base station part of the wireless relay station to the core network used by the donor base station, and the core network used by the donor base station directly forwards the uplink data To the core network used by the base station part of the wireless relay station. 7. The method of claim 1, further comprising: By using the base station of the wireless relay station as a new donor base station, other wireless relay stations are connected to the wireless cell of the new donor base station. 8. A wireless relay station, comprising a wireless relay station terminal part and a wireless relay station base station part, characterized in that the wireless relay station terminal part includes: The link establishment unit is used to establish a communication link between the base station part of the wireless relay station and the core network used by the host base station; A data transmission unit, configured to use the established communication link to forward the downlink data sent by the core network to the base station part of the wireless relay station, and forward the uplink data sent by the base station part of the wireless relay station to the core network . 9. The wireless relay station according to claim 8, wherein the link establishment unit comprises: A quality of service control module, configured to establish a dedicated bearer between the terminal part of the wireless relay station and the core network used by the donor base station; The base station data agent forwarding module is configured to use the dedicated bearer to establish a communication link between the base station part of the wireless relay station and the core network used by the base station part of the wireless relay station. 10. The wireless relay station according to claim 9, wherein the QoS control module establishes a multi-layer connection with the core network used by the donor base station by initiating multiple dedicated bearer establishment requests to the core network used by the donor base station. A dedicated bearer with different quality of service priorities. 11. The wireless relay station according to any one of claims 8-10, characterized in that the base station of the wireless relay station serves as a new master base station and connects other wireless relay stations to the wireless cells covered by it. 12. A wireless relay system, comprising a master base station and the wireless relay station according to any one of claims 8-11. 13. The wireless relay system according to claim 12, further comprising: The core network used by the base station part of the wireless relay station and the core network used by the host base station; Wherein, when the core network used by the base station part of the wireless relay station and the core network used by the host base station are the same core network, the core network forwards the uplink data to the corresponding network element Wherein, when the core network used by the wireless relay station base station part and the core network used by the host base station are different core networks, the core network used by the host base station directly forwards the uplink data forwarded by the host base station to the wireless relay station base station Part of the core network used. 14. The wireless relay system according to claim 13, wherein the core network used by the base station part of the wireless relay station and the core network used by the host base station are the same core network, and the core network includes a PDN gateway PGW, a mobile Management Entity MME and Serving Gateway SGW, where: The PGW is used to determine whether the uplink data is control plane data or user plane data, and if the PGW of the core network used by the host base station determines that the uplink data is control plane data, forward the control plane data to the core If the PGW of the core network used by the host base station determines that the uplink data is user plane data, the MME of the network forwards the user plane data to the SGW of the core network.