WO2017054661A1 - 一种无线中继方法、无线中继站及无线中继系统 - Google Patents

一种无线中继方法、无线中继站及无线中继系统 Download PDF

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Publication number
WO2017054661A1
WO2017054661A1 PCT/CN2016/099391 CN2016099391W WO2017054661A1 WO 2017054661 A1 WO2017054661 A1 WO 2017054661A1 CN 2016099391 W CN2016099391 W CN 2016099391W WO 2017054661 A1 WO2017054661 A1 WO 2017054661A1
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Prior art keywords
base station
wireless relay
core network
relay station
network used
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PCT/CN2016/099391
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English (en)
French (fr)
Inventor
李顺彬
申建华
刘振
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中兴通讯股份有限公司
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Publication of WO2017054661A1 publication Critical patent/WO2017054661A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a wireless relay method, a wireless relay station, and a wireless relay system.
  • a repeater pair is adopted in the second generation mobile communication technology (2nd-Generation, 2G)/third generation mobile communication technology (3rd-Generation, 3G) for the scenario where the base station ground transmission is difficult to deploy.
  • the wireless signal is enhanced to cover, and the ground transmission resource part is expanded by the network such as microwave to expand the deployment range of the base station, and to the fourth generation mobile communication technology (4th-Generation, 4G) stage, the third generation partnership project (3rd Generation Partnership)
  • the Project, 3GPP 3GPP
  • the wireless relay solution proposed by the 3GPP adopts a Long Term Evolution (LTE) wireless signal as a networking mode for transmitting a backhaul link.
  • LTE Long Term Evolution
  • an evolved Node B (eNB) implements a host base station ( Donor eNB, DeNB) function, a relay node (RN), that is, a relay station accesses a cell of a DeNB.
  • the RN provides an access coverage function for the terminal user, thereby expanding the coverage of the DeNB, and the wireless coverage can be extended at a lower cost.
  • the relay architecture of the 3GPP standard which involves adding a Relay function to a common eNB that has been put into commercial use on the existing network, to be converted into a DeNB, and a new network element RN needs to be added, thereby deploying to the operator.
  • the network is upgraded throughout the network to support the Relay function, which not only increases the operator's operating costs, but also extends the time required for network deployment.
  • the purpose of the embodiments 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 live network.
  • a wireless relay method 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 the host base station accessed by the wireless relay station;
  • the terminal of the wireless relay station forwards the downlink data sent by the core network used by the base station part of the wireless relay station to the base station of the wireless relay station by using the established communication link;
  • the terminal of the wireless relay station forwards the uplink data sent by the base station of the wireless relay station to the core network used by the base station of the wireless relay station by using the established communication link.
  • the step of establishing, by the wireless relay station terminal part, the communication link between the base station part of the wireless relay station and the core network used by the terminal station of the wireless relay station terminal comprises:
  • the wireless relay station terminal portion establishes a dedicated bearer between it and the core network used by the host base station;
  • the wireless relay station terminal portion utilizes the dedicated bearer to establish a communication link between the base station portion of the wireless relay station and the core network used by the base station portion of the wireless relay station.
  • the step of the wireless relay station terminal part establishing its dedicated bearer with the core network used by the host base station comprises:
  • the wireless relay station terminal part initiates multiple dedicated bearer setup requests to the core network used by the host base station, and establishes a plurality of dedicated bearers with different quality of service priorities between the core network used by the host base station.
  • the uplink data sent by the base station of the wireless relay station is forwarded to the core used by the base station of the wireless relay station.
  • the steps of the network include:
  • the terminal of the wireless relay station forwards the uplink data sent by the base station of the wireless relay station to the PGW of the core network used by the host base station by using the established communication link, and the PGW of the core network used by the host base station is according to the The type of the uplink data is forwarded to the corresponding network element of the core network.
  • the step of forwarding, by the PGW of the core network used by the host base station, the uplink data to the corresponding network element of the core network according to the type of the uplink data includes:
  • the PGW of the core network used by the host base station determines that the uplink data is control plane data or user plane data
  • the PGW of the core network used by the host base station determines that the uplink data is control plane data, forwarding the control plane data to the MME of the core network;
  • the PGW of the core network used by the host base station determines that the uplink data is user plane data, forwarding the user plane data to the SGW of the core network.
  • the uplink data sent by the base station of the wireless relay station is forwarded to the core used by the base station of the wireless relay station.
  • the steps of the network include:
  • the terminal of the wireless relay station forwards the uplink data sent by the base station of the wireless relay station to the core network used by the base station by using the established communication link, and directly forwards the uplink data by the core network used by the host base station. To the core network used by the base station portion of the wireless relay station.
  • the method further comprises:
  • the wireless relay station base station portion As a new donor base station, other wireless relay stations are accessed in the wireless cell of the new donor base station.
  • a wireless relay station including a wireless relay station terminal portion and a wireless relay station base station portion, wherein the wireless relay station terminal portion includes:
  • a link establishing unit configured to establish, by the host base station, a communication link between the base station portion of the wireless relay station and the core network used therein;
  • a data transmission unit configured to forward the downlink data sent by the core network to the base station of the wireless relay station by using the established communication link, and forward the uplink data sent by the base station of the wireless relay station to the core network .
  • the link establishing unit includes:
  • a quality of service control module configured to establish a dedicated bearer between the terminal portion of the wireless relay station and a core network used by the host base station;
  • a base station data proxy forwarding module configured to establish, by the dedicated bearer, a communication link between the base station portion of the wireless relay station and a core network used by the base station portion of the wireless relay station.
  • the quality of service control module initiates multiple dedicated bearer setup requests to the core network used by the donor base station, and establishes multiple dedicated bearers with different quality of service priorities between the core network used by the host base station.
  • the wireless relay station base station portion serves as a new donor base station, and other wireless relay stations access the wireless cells it covers.
  • a wireless relay system including a host base station and the above wireless relay station.
  • the method further comprises:
  • the core network forwards the uplink data to the corresponding data according to the type of uplink data forwarded by the host base station.
  • the core network used by the base station portion of the wireless relay station 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.
  • the core network used by the base station portion 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, where:
  • the PGW is configured to determine 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 determines that the uplink data is control plane data, forwarding the control plane data to the core
  • the MME of the network forwards the user plane data to the SGW of the core network if the PGW of the core network used by the host base station determines that the uplink data is user plane data.
  • a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing the implementation of the wireless relay method in the foregoing embodiment.
  • the embodiment of the present invention provides that the LTE relay function can be implemented without changing the eNB of the existing network to the DeNB, which greatly reduces the impact on the operation of the existing network and greatly improves the wireless coverage. This enables operators to quickly and flexibly implement Relay networking and reduce network operation costs.
  • the host base station and the wireless relay station in the embodiment of the present invention can adopt different wireless standards, can also support multi-level relays and provide QoS guarantee functions, greatly reduce the difficulty and cost of supporting LTE wireless networks to support wireless relays, and improve operators. Competitive ability.
  • FIG. 1 is a schematic block diagram of a wireless relay method according to an embodiment of the present invention.
  • FIG. 2 is a first schematic diagram of a wireless relay station composition model according to an embodiment of the present invention.
  • FIG. 3 is a second schematic diagram of a wireless relay station composition model according to an embodiment of the present invention.
  • FIG. 4 is a block diagram of a terminal part of a wireless relay station according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a dedicated bearer established by a wireless relay according to an embodiment of the present invention.
  • FIG. 6 is a network architecture diagram of a wireless relay system according to Embodiment 1 of the present invention.
  • FIG. 7 is a flowchart of a wireless relay system according to Embodiment 1 of the present invention.
  • FIG. 8 is a network architecture diagram of a wireless relay system when a wireless relay station and a 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 in different wireless systems according to Embodiment 3 of the present invention.
  • FIG. 10 is a flowchart showing the operation of a wireless relay system in different wireless systems according to Embodiment 3 of the present invention.
  • FIG. 11 is a structural diagram of a multi-level wireless relay system corresponding to Embodiment 4 of the present invention.
  • FIG. 1 is a schematic block diagram of a wireless relay method according to 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 the host base station accessed by the wireless relay station.
  • establishing a dedicated bearer between the terminal portion of the wireless relay station and a core network used by the donor base station, and establishing the dedicated bearer between the terminal portion of the wireless relay station and the core network used by the host base station A communication link between the base station portion of the wireless relay station and the core network used by the base station portion of the wireless relay station.
  • the terminal of the wireless relay station initiates multiple dedicated bearer setup requests to the core network used by the host base station, and establishes a plurality of dedicated bearers with different quality of service priorities between the core network used by the host base station.
  • the dedicated bearer setup request may also be initiated by the core network.
  • the core network actively initiates a dedicated bearer setup process, and establishes a plurality of dedicated bearers with different quality of service priorities between the wireless relay station terminal and the core network used by the host base station.
  • Step S102 the wireless relay station terminal part forwards 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 by using the established communication link, and sends the wireless relay station base station part.
  • the uplink data is forwarded to the core network used by the base station portion of the wireless relay station.
  • the wireless relay station terminal part forwards the uplink data sent by the base station of the wireless relay station to the location by using the established communication link.
  • the PGW of the core network used by the host base station the PGW of the core network used by the host base station forwards the uplink data to a corresponding network element of the core network according to the type of the uplink data, that is, used by the host base station
  • the PGW of the core network determines that the uplink data is control plane data or user plane data. If the PGW of the core network used by the host base station determines that the uplink data is control plane data, forwarding the control plane data to the core.
  • the MME of the network forwards the user plane data to the SGW of the core network if the PGW of the core network used by the host base station determines that the uplink data is user plane data.
  • the wireless relay station terminal part forwards the uplink data sent by the base station of the wireless relay station to the location by using the established communication link.
  • the core network used by the host base station directly forwards the uplink data to the core network used by the wireless relay station by the core network used by the host base station.
  • FIG. 3 is A first schematic diagram of a wireless relay station composition model is provided in the embodiment of the present invention. As shown in FIG. 3, the base station portion and the UE portion of the wireless relay station adopt an integrated mode.
  • FIG. 4 is a second schematic diagram of a wireless relay station composition model according to an embodiment of the present invention. As shown in FIG. 4, the base station portion and the UE portion of the wireless relay station adopt a separation mode.
  • the UE part further includes a UE proxy base station data forwarding module (hereinafter referred to as a base station data proxy forwarding module, having a proxy transmission function), and a wireless relay service quality (Quality), in addition to the radio frequency processing module, the baseband processing module, and the UE main control module.
  • the service (QoS) control module (hereinafter referred to as the service quality control module); the base station portion 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 may be Long Term Evolution-Frequency Division Duplexing (LTE-FDD), Long Term Evolution-Time Division Duplex (Long Term Evolution-Time Division) Duplexing, LTE-TDD) or Universal Mobile Telecommunications System (UMTS), Global System for Mobile Communication (GSM) and other different wireless systems.
  • LTE-FDD Long Term Evolution-Frequency Division Duplexing
  • LTE-TDD Long Term Evolution-Time Division Duplex
  • UMTS Universal Mobile Telecommunications System
  • GSM Global System for Mobile Communication
  • FIG. 4 is a block diagram of a terminal part of a wireless relay station according to an embodiment of the present invention. As shown in FIG. 4, the link establishing unit 10 and the data transmission unit 20 are included.
  • the link establishing unit 10 is arranged to establish a communication link between the base station portion of the wireless relay station and the core network used thereof via the donor base station.
  • the function of the link establishing unit 10 may be implemented by a quality of service control module and a base station data proxy forwarding module.
  • the quality of service control module establishes a dedicated bearer between the terminal portion of the wireless relay station and the core network used by the host base station.
  • the base station data proxy forwarding module establishes a communication link between the base station portion of the wireless relay station and the core network used by the base station portion of the wireless relay station by using a dedicated bearer between the terminal portion of the wireless relay station and the core network used by the host base station .
  • the service quality control module initiates multiple dedicated bearer setup requests to the core network used by the host base station, and establishes multiple dedicated bearers with different quality of service priorities between the core network used by the host base station.
  • the data transmission unit 20 is configured to forward the downlink data sent by the core network to the base station part of the wireless relay station by using the established communication link, and forward the uplink data sent by the base station part of the wireless relay station to the core network.
  • the functionality of data transmission unit 20 may be implemented by a base station data proxy forwarding module.
  • the UE part of the radio relay station performs proxy forwarding on the base station data of the base station part, that is, the UE part of the radio relay station forwards the base station data of the base station part of the radio relay station according to the pre-configured QoS policy. Further, when the UE of the wireless relay station accesses the cell of the host base station and obtains the 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 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 implements QoS control on the wireless relay data, and the QoS control mechanism of the wireless relay station enables the entire wireless relay system to have QoS capability.
  • the data sent by the core network to the base station of the wireless relay station by the host base station is transparently forwarded by the UE to the base station part, and the data sent by the base station part to the core network is transparently forwarded by the UE to the host base station, and then sent by the host base station to the core. network.
  • the workflow is as follows:
  • Step 1 After the wireless relay station is powered on, the wireless relay station UE part accesses the wireless cell of the host base station.
  • the second step the UE part of the wireless relay station initiates a QoS control process, and the QoS control module triggers the establishment of multiple dedicated bearers with different QoS priorities.
  • the dedicated bearers of different priorities may be different planes of the base station part of the wireless relay station (including the control plane/ The data stream of the user plane/management plane provides services, and can also provide services for IP data streams of different characteristics.
  • Each dedicated bearer is composed of a radio bearer (Radio Bearer) and an S1 bearer (S1 Bearer).
  • the third step the base station part of the wireless relay station sends an S1 connection establishment request (ie, a dedicated bearer setup request) through the UE part, and the base station data proxy forwarding module of the UE part maps the S1 connection establishment request data sent by the base station part to the dedicated QoS corresponding to the specified QoS.
  • an S1 connection establishment request is initiated to the Mobility Management Entity (MME) to complete the S1 connection establishment.
  • MME Mobility Management Entity
  • the fourth step the base station of the wireless relay station completes the establishment of the cell, and passes the remote radio unit (Remote Radio Unite, RRU) transmits broadcast and pilot signals to the outside.
  • RRU Remote Radio Unite
  • Step 5 The UE user accesses the wireless cell of the wireless relay station, and the related service data is composed of the wireless relay station base station to form the S1 user plane data, and then transmitted to the wireless relay station UE part, and the UE part maps the data stream to the dedicated corresponding to the specified QoS attribute. On the bearer, send it to the core network. Thereby, a mobile communication service such as a data service or a voice call is performed.
  • FIG. 5 is a schematic diagram of a dedicated bearer established by a wireless relay according to an embodiment of the present invention.
  • the UE of the wireless relay station initiates a QoS control process, specifically, the QoS control module of the UE part triggers establishment of a wireless relay station and a service gateway.
  • SGW Serving GateWay, SGW
  • PDN gateway Packet Data Network GateWay, PGW
  • the relay function is added to the LTE common eNB, and the implementation is complicated.
  • the related base station in the commercial LTE network is changed to support the relay function, and the version upgrade and the wireless tuning are required, so that the operation cost is greatly increased.
  • the present invention provides the above wireless relay technical solution, does not need to be upgraded for the host base station, and can implement multi-level relay and QoS control.
  • the present invention also provides a wireless relay system including the above wireless relay station and a host base station.
  • the host base station uses a common base station that has been deployed on the existing network, and the wireless relay station includes a wireless relay station UE part and a wireless relay station base station part.
  • the invention is further illustrated below in conjunction with Figures 6-11.
  • FIG. 6 is a network architecture diagram of a wireless relay system according to Embodiment 1 of the present invention. As shown in FIG. 6, the SGW/PGW is deployed as a network element in a common core network deployment of the wireless relay station and the host base station.
  • the UE part of the wireless relay station accesses the cell of the host base station, and then the UE part of the wireless relay station initiates a QoS control procedure to complete the establishment of the dedicated bearer.
  • the QoS control module of the UE part of the radio relay station may establish different dedicated bearers for different data streams of the base station portion of the radio relay station.
  • the base station part of the wireless relay station transmits the base station data to the specific QoS dedicated bearer and transmits the base station data to the core network through the base station data proxy forwarding module and the QoS control module of the UE part according to the data flow QoS characteristic, and establishes an S1 connection with the MME, and finally completes the wireless connection.
  • the UE is provided with a wireless service.
  • FIG. 7 is a flowchart of the operation of the wireless relay system according to 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 Search for the cell of the donor base station by the UE part of the wireless relay station, and access the cell of the host base station. After the access is completed, the UE part of the wireless relay station obtains the IP address allocated by the network element PGW of the core network.
  • Step 203 The UE of the wireless relay station sends a Bearer Resource Modification Request message (Request Bearer Resource Modification) to the MME according to the configured QoS control policy, and triggers the MME to initiate a dedicated bearer setup process.
  • a Bearer Resource Modification Request message (Request Bearer Resource Modification)
  • the process may also initiate a dedicated bearer setup process by using the core network, and the PGW triggers the MME to initiate a dedicated bearer setup process.
  • Step 204 The UE part of the wireless relay establishes a dedicated bearer of different QoS levels by triggering the dedicated bearer setup process as 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 the IP address to initiate the S1 control plane link establishment request, and the wireless relay station UE part QoS control module uses the data (ie, S1).
  • the control plane link setup request message is mapped to the dedicated bearer of the specific QoS attribute, and the S1 control plane link setup request message is transmitted to the host base station by the base station data proxy forwarding module of the UE part, and then the host base station passes the S1 of the donor base station.
  • the user plane link sends the S1 control plane link setup 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 a GTP-U packet format.
  • Step 206 The core network element SGW/PGW receives the GTP-U packet forwarded by the host base station, and extracts the S1 control plane link setup request message of the base station part of the wireless relay station, and forwards the message to the network element MME.
  • Step 207 The MME responds to the S1 control plane link setup request message of the base station part of the radio relay station, and forwards the S1 control plane link setup response message to the SGW/PGW.
  • Step 208 The SGW/PGW encapsulates the S1 control plane link setup response message into the GTP-U packet, and sends it to the host base station, and the host base station forwards the packet to the wireless relay station.
  • Step 209 The radio relay station UE part forwards the S1 control plane link setup response message to the base station part, and then the radio relay station establishes a cell.
  • Step 210 The UE user accesses the cell of the wireless relay station.
  • Step 211 The UE user initiates a wireless service.
  • Step 212 The wireless service data of the UE user is forwarded to the SGW/PGW by the wireless relay station mapping to the dedicated bearer of the specified QoS.
  • 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.
  • the core network used by the base station part of the wireless relay station and the host base station may adopt a common core network mode or a different core network mode. If the LTE system shown in Embodiment 1 is used, that is, the common core network, that is, the base station of the wireless relay station and the host base station communicate with the same core network, the core network element SGW/PGW needs to be increased. , to ensure that the PGW processed data is processed again.
  • the specific processing procedure 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 core network element MME, and 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.
  • the network element SGW but the core network element SGW/PGW is deployed as a network element, as shown in FIG. 6, the process can be completed inside the network element.
  • the radio relay station base station part of the embodiment 1 is an LTE radio system, and the radio relay station base station part may also be a base station of other standards.
  • the working process is basically the same as that described below, and the specific part of the message may be different.
  • FIG. 8 is a network architecture diagram of a wireless relay system when a wireless relay station and a host base station use different LTE core networks according to Embodiment 2 of the present invention.
  • the specific working process is similar to Embodiment 1 shown in FIG. 6 and FIG. 7. The difference is that, for the uplink, the terminal part of the wireless relay station forwards the uplink data sent by the base station of the wireless relay station to 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.
  • the core network used by the wireless relay station transmits 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 downlink data is loaded by the terminal part of the wireless relay station to Wireless relay station base station part.
  • the wireless relay station of the present invention can also use a different wireless system than the host base station.
  • 9 is a network architecture diagram of a wireless relay system in different wireless systems according to Embodiment 3 of the present invention.
  • the host base station is an LTE base station
  • the wireless relay station UE part can access the LTE network, and the wireless relay station base station part.
  • the working principle of the wireless relay station is further explained.
  • FIG. 10 is a flowchart of the operation of the wireless relay system in different wireless systems according to 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 of the wireless relay station searches for the cell of the host base station and accesses the cell of the host base station. After the access is completed, the UE part of the wireless relay station obtains the IP address allocated by the core network element PGW.
  • Step 303 The radio relay station UE part (LTE system) initiates a QoS control procedure to the MME according to the configured QoS control policy, and triggers the MME to establish a dedicated bearer with different QoS attributes.
  • LTE system The radio relay station UE part
  • the process may also initiate a dedicated bearer setup process by using the core network, and the PGW triggers the MME to initiate a dedicated bearer setup process.
  • Step 304 The radio relay station UE part establishes a plurality of dedicated bearers of different QoS levels by triggering the dedicated bearer setup process as described in step 303 multiple times.
  • Step 305 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 (UMTS wireless system) of the wireless relay station uses the IP address to initiate an Iub control plane link establishment request, and the base station data proxy of the UE part of the wireless relay station
  • the forwarding module transmits the Iub control plane link establishment request message to the host base station, and then the host base station sends 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 sent to the GTP-U message format.
  • Step 306 The core network element SGW/PGW receives the GTP-U packet 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 the message to the core network element of the UMTS standard.
  • Network Controller RNC
  • Step 307 The RNC responds to the Iub control plane link setup request message of the base station part of the radio relay station, and forwards the Iub control plane link setup response message to the SGW/PGW.
  • Step 308 The SGW/PGW encapsulates the Iub control plane link setup response message into the GTP-U packet, and sends it to the host base station, and the host base station forwards the packet to the wireless relay station.
  • Step 309 The radio relay station UE part forwards the Iub control plane link setup response message to the base station part, and then the radio relay station establishes a cell.
  • Step 310 The UE accesses a 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 of the specified QoS attribute, and forwards it to the SGW/PGW.
  • Step 313 The SGW/PGW forwards the radio service data of the UE to the RNC, so as to complete the radio service of the UE.
  • the wireless relay station in the present invention can also be applied to a scenario of multi-level wireless relay without modifying any architecture and design of the host base station and the wireless relay station, and only needs to continue to deploy the wireless relay station in the cell of the wireless relay station.
  • 11 is a structural diagram of a multi-level wireless relay system corresponding to Embodiment 4 of the present invention. As shown in FIG. 11, an eNB indicates a host base station, Relay 1 indicates a first-level wireless relay station, and Relay 2 indicates a second-level wireless relay station, and a multi-level wireless relay station. Different wireless systems can be used with the host base station.
  • the workflow of the multi-level wireless relay system is as follows:
  • the first step after the host 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.
  • the second step the second-level wireless relay station Relay2 is in the coverage of the first-stage wireless relay station Relay1 cell, after the power-on is completed, the second-level wireless relay station Relay2UE part is connected to the first-level wireless according to the procedure described in the first embodiment. In the cell of relay station Relay1.
  • the third step the UE 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 the wireless service in the multi-level wireless relay environment.
  • 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 implement multi-level wireless relay.
  • the present invention has the following technical effects:
  • the present invention provides a new wireless relay method and system for the current deployment of the 3GPP relay deployment, and does not need to upgrade the eNB of the existing network to the DeNB, without affecting the running status of the existing network.
  • the relay function of LTE is implemented, and the host base station and the relay station can adopt different wireless systems, and can also support multi-level relay.
  • the foregoing technical solution provided by the embodiment of the present invention can be applied to a wireless relay process, and the embodiment of the present invention provides no
  • the eNB of the current network needs to be upgraded to the DeNB to implement the LTE relay function without affecting the operation of the live network. This greatly reduces the impact on the existing network and greatly improves the wireless coverage.
  • the flexible implementation of the relay networking reduces the operating cost of the networking.
  • the host base station and the wireless relay station in the embodiments of the present invention can adopt different wireless standards, can also support multiple levels of relays, and provide QoS guarantee functions, thereby greatly reducing the LTE wireless network. Supporting the difficulty and cost of wireless relay implementation, and improving the competitiveness of operators.

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Abstract

本发明公开了一种无线中继方法、无线中继站及无线中继系统，涉及无线通信技术领域，所述方法包括：无线中继站终端部分经由其接入的宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路；无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分所用核心网发送的下行数据转发至所述无线中继站基站部分；无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用的核心网。本发明在不影响现网运行状态下实现中继功能，减小了对现网运行的波及，并大幅提升了无线覆盖范围，使得运营商可快速、灵活的实现中继组网，降低了组网运营成本。

Description

一种无线中继方法、无线中继站及无线中继系统 技术领域
本发明涉及无线通信技术领域，特别涉及一种无线中继方法、无线中继站及无线中继系统。
背景技术
随着智能终端的普及和移动互联网等技术飞跃式发展，对无线通信信号的覆盖要求越来越广泛。为了扩大无线信号覆盖范围，针对基站地面传输部署困难的场景，在第二代移动通信技术(2nd-Generation，2G)/第三代移动通信技术(3rd-Generation，3G)中采用直放站对无线信号进行增强覆盖，并且在地面传输资源部分采用微波等组网扩大基站的部署范围，而到了第四代移动通信技术(4th-Generation，4G)阶段，第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)标准组织提出针对无线信号的中继方案。直放站技术在放大无线信号的同时，也放大了信号噪声，而在如海岛等特定环境下，微波受气候、微波间障碍物等限制，在一些场景下部署非常受限。
3GPP提出的无线中继方案，采用长期演进(Long Term Evolution，LTE)无线信号作为传输回程链路的组网方式，该组网方式中，由演进节点(evolved Node B，eNB)实现宿主基站(Donor eNB，DeNB)功能，中继节点(Relay Node，RN)即中继站接入DeNB的小区。其中RN为终端用户提供接入覆盖功能，从而起到扩大DeNB的覆盖范围的功能，可以以较低的成本扩展无线覆盖范围。
但是，对于3GPP标准的中继(Relay)架构，其中涉及在现网已投入商用使用的普通eNB上增加Relay功能，以改造成DeNB，同时需要增加新的网元RN，从而对运营商部署的网络进行全网版本升级，用以支持Relay功能，这样，不仅增加了运营商的运营成本，而且延长了网络部署所需的时间。
发明内容
本发明实施例的目的在于提供一种无线中继方法、无线中继站及无线中继系统，能更好地避免无线中继部署对现网的影响。
根据本发明的一个实施例，提供了一种无线中继方法，包括：
无线中继站终端部分经由其接入的宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路；
无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分所用核心网发送的下行数据转发至所述无线中继站基站部分；
无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用的核心网。
优选地，所述无线中继站终端部分经由其接入的宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路的步骤包括：
无线中继站终端部分建立其与所述宿主基站所用核心网之间的专用承载；
无线中继站终端部分利用所述专用承载，建立所述无线中继站基站部分与所述无线中继站基站部分所用核心网之间的通讯链路。
优选地，所述无线中继站终端部分建立其与所述宿主基站所用核心网之间的专用承载的步骤包括：
所述无线中继站终端部分通过向宿主基站所用核心网发起多次专用承载建立请求，建立与所述宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
优选地，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网是同一核心网时，所述将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用核心网的步骤包括：
所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发至所述宿主基站所用核心网的PGW，由所述宿主基站所用核心网的PGW根据所述上行数据的类型，将所述上行数据转发至所述核心网的相应网元。
优选地，所述宿主基站所用核心网的PGW根据所述上行数据的类型，将所述上行数据转发至所述核心网的相应网元的步骤包括：
所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据或用户面数据；
若所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据，则将所述控制面数据转发至所述核心网的MME；
若所述宿主基站所用核心网的PGW判断所述上行数据是用户面数据，则将所述用户面数据转发至所述核心网的SGW。
优选地，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网是不同核心网时，所述将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用核心网的步骤包括：
所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发至所述宿主基站所用核心网，由所述宿主基站所用核心网直接将所述上行数据转发至所述无线中继站基站部分所用核心网。
优选地，还包括：
通过将所述无线中继站基站部分作为新的宿主基站，将其它无线中继站接入所述新的宿主基站的无线小区中。
根据本发明的另一实施例，提供了一种无线中继站，包括无线中继站终端部分和无线中继站基站部分，其中，所述无线中继站终端部分包括：
链路建立单元，设置为经由宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路；
数据传输单元，设置为利用所建立的通讯链路，将所述核心网发送的下行数据转发至所述无线中继站基站部分，并将所述无线中继站基站部分发送的上行数据转发给所述核心网。
优选地，所述链路建立单元包括：
服务质量控制模块，设置为建立所述无线中继站终端部分和所述宿主基站所用核心网之间的专用承载；
基站数据代理转发模块，设置为利用所述专用承载，建立所述无线中继站基站部分与所述无线中继站基站部分所用核心网之间的通讯链路。
优选地，所述服务质量控制模块通过向宿主基站所用核心网发起多次专用承载建立请求，建立与所述宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
优选地，所述无线中继站基站部分作为新的宿主基站，将其它无线中继站接入其覆盖的无线小区。
根据本发明的另一实施例，提供了一种无线中继系统，包括宿主基站和上述无线中继站。
优选地，还包括：
所述无线中继站基站部分所用核心网和所述宿主基站所用核心网；
其中，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网为同一核心网时，所述核心网根据所述宿主基站转发的上行数据的类型，将所述上行数据转发至相应网元；
其中，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网为不同核心网时，所述宿主基站所用核心网将所述宿主基站转发的上行数据直接转发至所述无线中继站基站部分所用核心网。
优选地，所述无线中继站基站部分所用核心网和所述宿主基站所用核心网为同一核心网，所述核心网包括PDN网关PGW、移动管理实体MME和服务网关SGW，其中：
PGW，设置为判断所述上行数据是控制面数据或用户面数据，若所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据，则将所述控制面数据转发至所述核心网的MME，若所述宿主基站所用核心网的PGW判断所述上行数据是用户面数据，则将所述用户面数据转发至所述核心网的SGW。
在本发明实施例中，还提供了一种计算机存储介质，该计算机存储介质可以存储有执行指令，该执行指令用于执行上述实施例中的无线中继方法的实现。
与现有技术相比较，本发明实施例的有益效果在于：
1、本发明实施例提供无需将现网的eNB升级为DeNB，在不影响现网运行状态下实现LTE的Relay功能，极大的减小了对现网运行的波及，并大幅提升无线覆盖范围，使得运营商可快速、灵活的实现Relay组网，降低了组网运营成本；
2、本发明实施例的宿主基站与无线中继站可以采用不同无线制式，还可以支持多级Relay以及提供QoS保障功能，极大地降低LTE无线网络支持无线中继的实现难度和成本，提升了运营商竞争能力。
附图说明
图1是本发明实施例提供的无线中继方法原理框图；
图2是本发明实施例提供的无线中继站组成模型第一示意图；
图3是本发明实施例提供的无线中继站组成模型第二示意图；
图4是本发明实施例提供的无线中继站终端部分框图；
图5是本发明实施例提供的无线中继所建立的专用承载示意图；
图6是本发明实施例1提供的无线中继系统网络架构图；
图7是本发明实施例1提供的无线中继系统工作流程图；
图8是本发明实施例2无线中继站与宿主基站使用不同LTE核心网时无线中继系统网络架构图；
图9是本发明实施例3提供的不同无线制式下的无线中继系统网络架构图；
图10是本发明实施例3提供的不同无线制式下的无线中继系统工作流程图；
图11是本发明实施例4对应的多级无线中继系统架构图。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
图1是本发明实施例提供的无线中继方法原理框图，如图1所示，步骤包括：
步骤S101：无线中继站终端部分通过其接入的宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路。
具体地说，建立所述无线中继站终端部分和所述宿主基站所用核心网之间的专用承载，并利用所述无线中继站终端部分和所述宿主基站所用核心网之间的专用承载，建立所述无线中继站基站部分与所述无线中继站基站部分所用核心网之间的通讯链路。
其中，所述无线中继站终端部分通过向宿主基站所用核心网发起多次专用承载建立请求，建立与所述宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
其中，专用承载建立请求也可以通过核心网主动发起。由核心网主动发起专用承载建立过程，建立无线中继站终端与宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
步骤S102：所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分所用核心网发送的下行数据转发至所述无线中继站基站部分，并将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用的核心网。
当所述宿主基站所用核心网和所述无线中继站所用核心网是同一核心网时，所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发至所述宿主基站所用核心网的PGW，由所述宿主基站所用核心网的PGW根据所述上行数据的类型，将所述上行数据转发至所述核心网的相应网元，即，所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据或用户面数据，若所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据，则将所述控制面数据转发至所述核心网的MME，若所述宿主基站所用核心网的PGW判断所述上行数据是用户面数据，则将所述用户面面数据转发至所述核心网的SGW。
当所述宿主基站所用核心网和所述无线中继站所用核心网是不同核心网时，所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发至所述宿主基站所用核心网，由所述宿主基站所用核心网直接将所述上行数据转发至所述无线中继站所用核心网。
进一步地，本发明还提供了一种无线中继站，包括无线中继站终端部分(即UE部分)和无线中继站基站部分，所述无线中继站UE部分和基站部分可以使用分离或者集成在一起，图3是本发明实施例提供的无线中继站组成模型第一示意图，如图3所示，无线中继站基站部分和UE部分采用集成模式。图4是本发明实施例提供的无线中继站组成模型第二示意图，如图4所示，无线中继站基站部分和UE部分采用分离模式。其中，UE部分除包括射频处理模块、基带处理模块和UE主控模块外，进一步包括UE代理基站数据转发模块(以下简称基站数据代理转发模块，具有代理传输功能)，无线中继服务质量(Quality of Service，QoS)控制模块(以下简称服务质量控制模块)；基站部分包括基站射频处理模块、基站基带处理模块和基站主控模块。无线中继站中基站部分可以为长期演进-频分双工(Long Term Evolution-Frequency Division Duplexing，LTE-FDD)，长期演进-时分双工(Long Term Evolution-Time Division  Duplexing，LTE-TDD)或者通用移动通信系统(Universal Mobile Telecommunications System，UMTS)，全球移动通信系统(Global System for Mobile Communication,GSM)等不同的无线制式。
图4是本发明实施例提供的无线中继站终端部分框图，如图4所示，包括链路建立单元10和数据传输单元20。
链路建立单元10设置为经由宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路。链路建立单元10的功能可以由服务质量控制模块和基站数据代理转发模块实现，具体地说，服务质量控制模块建立所述无线中继站终端部分和所述宿主基站所用核心网之间的专用承载，然后基站数据代理转发模块利用所述无线中继站终端部分和所述宿主基站所用核心网之间的专用承载，建立所述无线中继站基站部分与所述无线中继站基站部分所用核心网之间的通讯链路。其中，服务质量控制模块通过向宿主基站所用核心网发起多次专用承载建立请求，建立与所述宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
数据传输单元20设置为利用所建立的通讯链路，将所述核心网发送的下行数据转发至所述无线中继站基站部分，并将所述无线中继站基站部分发送的上行数据转发给所述核心网。数据传输单元20的功能可以由基站数据代理转发模块实现。
也就是说，无线中继站UE部分对基站部分的基站数据进行代理转发，该代理转发也就是无线中继站UE部分根据预先配置的QoS策略，转发无线中继站基站部分的基站数据。进一步说，当无线中继站UE部分接入宿主基站的小区，从核心网获得IP地址，无线中继站将该IP地址配置为无线中继站基站部分的业务IP地址。无线中继站基站部分采用该业务IP地址通过无线中继站UE部分与LTE其他网元进行通信。其中UE部分实现对无线中继数据的QoS控制，通过无线中继站的QoS控制机制使得整个无线中继系统均具备QoS能力。对于核心网通过宿主基站发给无线中继站基站部分的数据，由UE部分透明转发给基站部分，对于基站部分发给核心网的数据，由UE部分透明转发给宿主基站，再由宿主基站发送给核心网。
工作流程如下：
第一步：无线中继站上电之后，无线中继站UE部分接入宿主基站的无线小区。
第二步：无线中继站UE部分发起QoS控制流程，由QoS控制模块触发建立具备不同QoS优先级的多个专用承载，不同优先级的专用承载可以为无线中继站基站部分的不同平面(包括控制面/用户面/管理平面等平面)的数据流提供服务，也可为不同特征的IP数据流提供服务，每个专用承载均由无线承载(Radio Bearer)和S1承载(S1 Bearer)组成。
第三步：无线中继站基站部分通过UE部分发送S1连接建立请求(即专用承载建立请求)，由UE部分的基站数据代理转发模块将基站部分发送的S1连接建立请求数据映射到指定QoS对应的专用承载上，向现网移动管理实体(Mobility Management Entity，MME)发起S1连接建立请求，完成S1连接建立。
第四步：无线中继站基站部分完成小区的建立，通过射频拉远单元(Remote Radio Unite， RRU)向外发射广播和导频信号。
第五步：UE用户接入无线中继站的无线小区，相关业务数据由无线中继站基站构成S1用户面数据，再传递给无线中继站UE部分，由UE部分将该数据流映射到指定QoS属性对应的专用承载上，向核心网发送。从而进行数据业务或者语音电话等移动通信业务。
图5是本发明实施例提供的无线中继所建立的专用承载示意图，如图5所示，无线中继站UE部分发起QoS控制流程，具体是由UE部分的QoS控制模块触发建立无线中继站和服务网关(Serving GateWay，SGW)/PDN网关(Packet Data Network GateWay，PGW)之间的专用承载，所建立的专用承载均由无线承载和S1承载组成。
由于现有技术中，对LTE普通eNB增加Relay功能，实现复杂，特别是对已商用LTE网络中相关基站进行变更以支持Relay功能，需要版本升级、无线调优等，使得运营成本大幅增加。本发明为了解决Relay部署对现网的影响，减少Relay运营成本，提供了上述无线中继技术方案，对宿主基站无需进行升级，并且可以实现多级中继和QoS控制。
进一步地，本发明还提供了一种无线中继系统，所述无线中继系统包括上述无线中继站和宿主基站。其中，宿主基站使用现网已部署的普通基站，无线中继站包括无线中继站UE部分和无线中继站基站部分。以下结合图6-图11对本发明进行进一步阐述。
图6是本发明实施例1提供的无线中继系统网络架构图，如图6所示，在无线中继站与宿主基站采用共核心网部署下，其中SGW/PGW部署成一个网元。
无线中继站上电之后，无线中继站的UE部分接入宿主基站的小区，然后无线中继站的UE部分发起QoS控制流程，完成专用承载的建立。无线中继站UE部分的QoS控制模块可针对无线中继站基站部分的不同数据流建立不同的专用承载。然后无线中继站的基站部分通过UE部分的基站数据代理转发模块和QoS控制模块按照数据流QoS特性，将基站数据映射到特定QoS专用承载上传输到核心网，与MME建立S1连接，最后完成无线中继小区的建立，为UE提供无线服务。
图7是本发明实施例1提供的无线中继系统工作流程图，如图7所示，步骤包括：
步骤201：无线中继站上电。
步骤202：由无线中继站的UE部分搜索宿主基站的小区，并接入宿主基站的小区。接入完成后，无线中继站UE部分获得核心网的网元PGW分配的IP地址。
步骤203：无线中继站UE部分根据配置的QoS控制策略，向MME发送承载资源建立请求消息(Request Bearer Resource Modification)，触发MME发起专用承载建立过程。
可选地，该流程也可以通过核心网主动发起专用承载建立过程，由PGW触发MME发起专用承载建立过程。
步骤204：无线中继中UE部分通过多次触发如步骤203所述的专用承载建立过程，建立多个不同QoS级别的专用承载。
步骤205：无线中继站将核心网分配的IP地址作为基站部分的业务IP，无线中继站基站部分采用该IP地址发起S1控制面链路建立请求，由无线中继站UE部分QoS控制模块将该数据(即S1控制面链路建立请求消息)映射到特定QoS属性的专用承载上，通过UE部分的基站数据代理转发模块将S1控制面链路建立请求消息传输给宿主基站，再由宿主基站通过宿主基站的S1用户面链路，将无线中继站基站部分发起的S1控制面链路建立请求消息发送给核心网的网元SGW/PGW，消息格式为GTP-U报文格式。
步骤206：核心网网元SGW/PGW收到宿主基站转发的GTP-U报文，从中提取出无线中继站基站部分的S1控制面链路建立请求消息，并转发给网元MME。
步骤207：MME对无线中继站基站部分的S1控制面链路建立请求消息进行响应，将S1控制面链路建立响应消息转发给SGW/PGW。
步骤208：SGW/PGW将S1控制面链路建立响应消息封装到GTP-U报文中，下发给宿主基站，并由宿主基站转发至无线中继站
步骤209：无线中继站UE部分将S1控制面链路建立响应消息转发给基站部分，随后无线中继站建立小区。
步骤210：UE用户接入无线中继站的小区。
步骤211：UE用户发起无线业务。
步骤212：UE用户的无线业务数据由无线中继站映射到指定QoS的专用承载上转发至SGW/PGW。
步骤213：SGW/PGW将UE用户的无线业务数据转发至业务服务器，从而完成UE的无线业务。
需要注意的是，对无线中继站基站部分与宿主基站所使用的核心网，可以采用共核心网模式或者用不同核心网模式。其中，如果均采用实施例1所示的LTE制式，即共核心网，也就是无线中继站基站部分与宿主基站都是用同一套核心网进行通信，那么核心网网元SGW/PGW需要增加相关配置，确保对PGW处理后的数据进行再次处理。具体处理过程为：如果PGW处理后的数据是无线中继站基站部分的控制面数据，需要转发给核心网网元MME，如果PGW处理后的数据是无线中继站基站部分的用户面数据，需要转发给核心网网元SGW，但核心网网元SGW/PGW部署为一个网元时，如图6所示，可以在该网元内部完成该处理过程。
实施例1的无线中继站基站部分是以LTE无线制式为例，无线中继站基站部分也可以是其他制式的基站，工作的流程和下面介绍的流程基本相同，可能具体部分的消息会有所区别。
图8是本发明实施例2无线中继站与宿主基站使用不同LTE核心网时无线中继系统网络架构图，如图8所示，具体工作流程与图6和图7所示的实施例1类似。区别在于，对于上行，无线中继站终端部分将无线中继站基站部分发送的上行数据转发至宿主基站所用核心网， 由宿主基站所用核心网直接将上行数据转发至无线中继站所用核心网。对于下行，无线中继站所用核心网将下行数据发送至宿主基站所用核心网，由宿主基站所用核心网将下行数据经由宿主基站转发至无线中继站终端部分，再由无线中继站终端部分将下行数据装法至无线中继站基站部分。
本发明的无线中继站还可以和宿主基站使用不同的无线制式。图9是本发明实施例3提供的不同无线制式下的无线中继系统网络架构图，如图9所示，以宿主基站为LTE基站，无线中继站UE部分能够接入LTE网络，无线中继站基站部分为UMTS基站为例，进一步说明无线中继站的工作原理。
图10是本发明实施例3提供的不同无线制式下的无线中继系统工作流程图，如图10所示，步骤包括：
步骤301：无线中继站上电。
步骤302：无线中继站UE部分搜索宿主基站的小区，并接入宿主基站的小区，接入完成后，无线中继站UE部分获得核心网网元PGW分配的IP地址。
步骤303：无线中继站UE部分(LTE制式)根据配置的QoS控制策略，向MME发起QoS控制流程，触发MME建立不同QoS属性的专用承载。
可选地，该流程也可以通过核心网主动发起专用承载建立过程，由PGW触发MME发起专用承载建立过程。
步骤304：无线中继站UE部分通过多次触发如步骤303所述的专用承载建立过程，建立多个不同QoS级别的专用承载。
步骤305：无线中继站将核心网分配的IP地址作为基站部分的业务IP，无线中继站基站部分(UMTS无线制式)采用该IP地址发起Iub控制面链路建立请求，由无线中继站UE部分的基站数据代理转发模块将Iub控制面链路建立请求消息传输给宿主基站，再由宿主基站通过宿主基站的S1用户面链路(即S1-U)，将无线中继站基站部分发起的Iub控制面链路建立请求消息发送给核心网网元SGW/PGW，消息格式给GTP-U报文格式。
步骤306：核心网网元SGW/PGW收到宿主基站转发的GTP-U报文，从中提取出无线中继站基站部分的Iub控制面链路建立请求消息，并转发给UMTS制式的核心网网元无线网络控制器(Radio Network Controller，RNC)。
步骤307：RNC对无线中继站基站部分的Iub控制面链路建立请求消息进行响应，将Iub控制面链路建立响应消息转发给SGW/PGW。
步骤308：SGW/PGW将Iub控制面链路建立响应消息封装到GTP-U报文中，下发给宿主基站，由宿主基站转发至无线中继站。
步骤309：无线中继站UE部分将Iub控制面链路建立响应消息转发给基站部分，随后无线中继站建立小区。
步骤310：UE接入无线中继站的小区。
步骤311：UE向无线中继站发起无线业务。
步骤312：无线中继站将UE的无线业务数据映射到指定QoS属性的专用承载上，并转发至SGW/PGW。
步骤313：SGW/PGW将UE的无线业务数据转发至RNC，以便完成UE的无线业务。
本发明中的无线中继站还可以应用于多级无线中继的场景，而不需要修改宿主基站和无线中继站的任何架构与设计，只需要在无线中继站的小区中继续部署无线中继站即可。图11是本发明实施例4对应的多级无线中继系统架构图，如图11所示，eNB表示宿主基站，Relay1表示第一级无线中继站，Relay2表示第二级无线中继站，多级无线中继站和宿主基站可以使用不同的无线制式。
多级无线中继系统的工作流程如下：
第一步：宿主基站eNB完成小区的建立后，第一级无线中继站Relay1完成上电，按照实施例1中无线中继站的工作流程，接入LTE网络。
第二步：第二级无线中继站Relay2在第一级无线中继站Relay1小区的覆盖范围内，完成上电之后，第二级无线中继站Relay2UE部分按照实施例1中介绍的流程接入到第一级无线中继站Relay1的小区中。
第三步：位于第二级无线中继站Relay2的小区中的UE，接入第二级无线中继站Relay2的小区，并发起业务，从而实现了多级无线中继环境提供无线服务的功能。
实际上是将第一级无线中继站Relay1作为新的宿主基站，将第二级无线中继站Relay2接入第一级无线中继站Relay1覆盖的无线小区，实现多级无线中继。
为了说明该发明，描述了上述实施例，本领域的技术人员将意识到各种改进、增加和取代是有可能的，因此，本发明的范围应当不限于上述的实施例。
综上所述，本发明具有以下技术效果：
本发明针对3GPP的Relay部署会对现网进行改造的现状，提供了一种新的无线中继方法及系统，无需将现网的eNB升级为DeNB，能够在不影响现网运行状态的情况下实现LTE的Relay功能，并且宿主基站与中继站可以采用不同无线制式，还可以支持多级Relay。
尽管上文对本发明进行了详细说明，但是本发明不限于此，本技术领域技术人员可以根据本发明的原理进行各种修改。因此，凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。
工业实用性
本发明实施例提供的上述技术方案，可以应用于无线中继过程中，本发明实施例提供无 需将现网的eNB升级为DeNB，在不影响现网运行状态下实现LTE的Relay功能，极大的减小了对现网运行的波及，并大幅提升无线覆盖范围，使得运营商可快速、灵活的实现Relay组网，降低了组网运营成本；同时，本发明实施例的宿主基站与无线中继站可以采用不同无线制式，还可以支持多级Relay以及提供QoS保障功能，极大地降低LTE无线网络支持无线中继的实现难度和成本，提升了运营商竞争能力。

Claims (14)

  1. 一种无线中继方法，包括：
    无线中继站终端部分经由其接入的宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路；
    无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分所用核心网发送的下行数据转发至所述无线中继站基站部分；
    无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用的核心网。
  2. 根据权利要求1所述的方法，其中，所述无线中继站终端部分经由其接入的宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路的步骤包括：
    无线中继站终端部分建立其与所述宿主基站所用核心网之间的专用承载；
    无线中继站终端部分利用所述专用承载，建立所述无线中继站基站部分与所述无线中继站基站部分所用核心网之间的通讯链路。
  3. 根据权利要求2所述的方法，其中，所述无线中继站终端部分建立其与所述宿主基站所用核心网之间的专用承载的步骤包括：
    所述无线中继站终端部分通过向宿主基站所用核心网发起多次专用承载建立请求，建立与所述宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
  4. 根据权利要求2或3所述的方法，其中，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网是同一核心网时，所述将所述无线中继站基站部分发送的上行数据转发给所述无线中继站基站部分所用核心网的步骤包括：
    所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发至所述宿主基站所用核心网的PGW，由所述宿主基站所用核心网的PGW根据所述上行数据的类型，将所述上行数据转发至所述核心网的相应网元。
  5. 根据权利要求4所述的方法，其中，所述宿主基站所用核心网的PGW根据所述上行数据的类型，将所述上行数据转发至所述核心网的相应网元的步骤包括：
    所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据或用户面数据；
    若所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据，则将所述控制面数据转发至所述核心网的MME；
    若所述宿主基站所用核心网的PGW判断所述上行数据是用户面数据，则将所述用户面数据转发至所述核心网的SGW。
  6. 根据权利要求2或3所述的方法，其中，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网是不同核心网时，所述将所述无线中继站基站部分发送的上行数据转发 给所述无线中继站基站部分所用核心网的步骤包括：
    所述无线中继站终端部分利用所建立的通讯链路，将所述无线中继站基站部分发送的上行数据转发至所述宿主基站所用核心网，由所述宿主基站所用核心网直接将所述上行数据转发至所述无线中继站基站部分所用核心网。
  7. 根据权利要求1所述的方法，其中，还包括：
    通过将所述无线中继站基站部分作为新的宿主基站，将其它无线中继站接入所述新的宿主基站的无线小区中。
  8. 一种无线中继站，包括无线中继站终端部分和无线中继站基站部分，所述无线中继站终端部分包括：
    链路建立单元，设置为经由宿主基站，建立无线中继站基站部分及其所用核心网之间的通讯链路；
    数据传输单元，设置为利用所建立的通讯链路，将所述核心网发送的下行数据转发至所述无线中继站基站部分，并将所述无线中继站基站部分发送的上行数据转发给所述核心网。
  9. 根据权利要求8所述的无线中继站，其中，所述链路建立单元包括：
    服务质量控制模块，设置为建立所述无线中继站终端部分和所述宿主基站所用核心网之间的专用承载；
    基站数据代理转发模块，设置为利用所述专用承载，建立所述无线中继站基站部分与所述无线中继站基站部分所用核心网之间的通讯链路。
  10. 根据权利要求9所述的无线中继站，其中，所述服务质量控制模块通过向宿主基站所用核心网发起多次专用承载建立请求，建立与所述宿主基站所用核心网之间的多个具备不同服务质量优先级的专用承载。
  11. 根据权利要求8-10任意一项所述的无线中继站，其中，所述无线中继站基站部分作为新的宿主基站，将其它无线中继站接入其覆盖的无线小区。
  12. 一种无线中继系统，包括宿主基站和上述权利要求8-11任意一项所述的无线中继站。
  13. 根据权利要求12所述的无线中继系统，其中，还包括：
    所述无线中继站基站部分所用核心网和所述宿主基站所用核心网；
    其中，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网为同一核心网时，所述核心网根据所述宿主基站转发的上行数据的类型，将所述上行数据转发至相应网元
    其中，当所述无线中继站基站部分所用核心网和所述宿主基站所用核心网为不同核 心网时，所述宿主基站所用核心网将所述宿主基站转发的上行数据直接转发至所述无线中继站基站部分所用核心网。
  14. 根据权利要求13所述的无线中继系统，其中，所述无线中继站基站部分所用核心网和所述宿主基站所用核心网为同一核心网，所述核心网包括PDN网关PGW、移动管理实体MME和服务网关SGW，其中：
    PGW，设置为判断所述上行数据是控制面数据或用户面数据，若所述宿主基站所用核心网的PGW判断所述上行数据是控制面数据，则将所述控制面数据转发至所述核心网的MME，若所述宿主基站所用核心网的PGW判断所述上行数据是用户面数据，则将所述用户面数据转发至所述核心网的SGW。10、如权利要求9所述的网关设备，其中，所述确定子模块包括：
    重定向单元，设置为在确定未重复接收过该页面访问请求时，将所述页面访问请求重定向至服务器，以供所述服务器返回并发请求指令；
    第一转发单元，设置为在接收到所述并发请求指令时，将所述并发请求指令转发至所述终端。
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