CN106304242A

CN106304242A - A kind of multi-hop communication system and node thereof

Info

Publication number: CN106304242A
Application number: CN201510264045.4A
Authority: CN
Inventors: 施小娟
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-05-21
Filing date: 2015-05-21
Publication date: 2017-01-04
Anticipated expiration: 2035-05-21
Also published as: WO2016184150A1; CN106304242B

Abstract

The present invention provides a kind of multi-hop communication system and node thereof；Described system, user equipment (UE), initial access node, at least one intermediary routing node, a gateway node and equipment of the core network is included including a: communication path of described multi-hop communication system, described gateway node is characterised by, for by setting up S1 interface between wired backhaul and described equipment of the core network, by described S1 interface and described equipment of the core network communication；It is additionally operable to by setting up wireless backhaul Ub interface between one of them routing node of wireless backhaul link and at least one intermediary routing node described, by described Ub interface and described intermediary routing node communication；It is additionally operable to by setting up logic S1 interface between wireless backhaul link and described initial access node, by described logic S1 interface and described initial access node communication.

Description

A kind of multi-hop communication system and node thereof

Technical field

The present invention relates to the communications field, particularly relate to a kind of multi-hop communication system and node thereof.

Background technology

Cellular wireless mobile communication system starts development from the eighties in 20th century, meets the mankind from the beginning The voice communication development of demand progressively meet on the basis of speech business finally the mankind basic data lead to Letter demand.In prior art, cellular radio Communication system is disposed by wireless carriers and runs, network Build through the careful planning of operator, if Fig. 1 is the net of cellular radio access network in prior art Network topology schematic diagram, in Fig. 1, the addressing of each macro base station (macro (e) NB, MNB) is by runing Business's planning determines, each macro base station can reach the wireless coverage of the most a few km of hundreds of rice, such that it is able to Realize the nearly continuity seamless coverage in operator region.

Along with the arrival in mobile interchange epoch, new Mobile solution demand, especially those require high-quality, Two-forty, the Mobile solution demand of low delay occur in that the growth of explosion type, according to industry prediction, not Coming in 10 years, wireless mobile services amount will appear from the growth of thousands of times, realizes distance grand in prior art The wireless communication system covered cannot realize the hugest capacity requirement.On the other hand, industry is by right The statistics of telex network behavior and custom finds, the mobile service of most of high data traffic is concentrated and occurred in Indoor environment and hot zones, such as market, school, user's family, large-scale performance, marketplace etc., Indoor environment and hot zones have area distribution wide and dissipate, single regional extent is little, user collects medium feature, The wide covering of cellular radio in prior art, uniform fold, fixing covering feature make it cannot be very Good adapt to the characteristic that service set in this small area occurs, additionally, in prior art honeycomb without Gauze network exists at cellular radio signal owing to the stop etc. of various reasons, such as building can cause Indoor environment is not so good as outdoor environment, and this also makes cellular radio in prior art cannot meet room in the future Large data capacity demand under interior environment.

For solving the problems referred to above, a kind of wireless access network minor node (small radio access network Node, SRAN-node) arise at the historic moment.In concept, wireless access network minor node refers to launch merit Rate is lower than the transmitting power of macro base station in prior art thus coverage is also than macro base station in prior art The wireless access network node that coverage is little, therefore wireless access network minor node is referred to as low-power joint Point (Lower Power Node, LPN), can be specifically micro-base station (Pico Node), family's base Stand (Femto/Home (e) NB), wireless relay access device (Relay), and other are likely to occur Any transmitting power far below macro base station in prior art, subscriber equipment can pass through wireless communication link The access network equipment of road access network.And be that the huge capacity meeting future broadband wireless communication systems promotes demand, Especially for adapting to the centralized big data quantity requirement in specific region, industry prediction can be in specific region Increase the deployment density of SRAN-node to realize increasing of network capacity, meet user's request, this In specific region the network industry of dense deployment be referred to as super-intensive network (Ultra Dense Network, UDN).Fig. 2 be cellular radio access network in the prior art specific region in dispose UDN Schematic diagram, wherein, in mansion shown in 200, in stadium shown in 210, at focus shown in 230 Region all deploys a large amount of SRAN-node.

UDN can improve network capacity, and while improving network capacity, following network is not wished Hope Capital expenditure (Capital Expenditure, CAPEX) and the operation expenditure (Operating increasing network Expense, OPEX), this mean that the deployment of UDN need to reduce artificial plan, optimization and Management, can be according to network topology, network load, business demand etc. in indoor, outdoor hot spot region Or high traffic region completes flexible rapid deployment, and realizes self-configuring, self-optimizing and certainly cure.Real Existing all these targets, industry generally believes that in UDN, only part or a small amount of SRAN-node are permissible By wired connection (wired backhaul), such as the core network access equipment such as optical fiber, cable, and other SRAN-node then need support wireless backhaul (wireless backhaul), utilize SRAN-node it Between the characteristic disposed of intensive short distance, realized by wireless backhaul link between SRAN-node Interconnecting between SRAN-node, and by wireless backhaul link through two SRAN-node Between wireless connections (jump) or to sequentially pass through the wireless connections between multiple SRAN-node (many Jump) core network access equipment.

Following UDN needs dense deployment to have a large amount of SRAN-node, and part therein is the most a large amount of Realize interconnecting further through wireless backhaul link between SRAN-node, and jump or multi-hop through one Wireless connections core network access equipment.Hence set up the communication of the data communication realized under intensive multi-hop scene System, is that achievement is needed badly and solved the technical problem that.

Summary of the invention

The present invention provides a kind of multi-hop communication system and node thereof, will solve the technical problem that it is how to set up Realize the communication system of data communication under intensive multi-hop scene.

For solving above-mentioned technical problem, the technical scheme is that

A kind of multi-hop communication system, a communication path of described multi-hop communication system includes subscriber equipment UE, initial access node, at least one intermediary routing node, a gateway node and core net set Standby, wherein:

Described initial access node, for by setting up wireless connecing between wireless access links and described UE Enter Uu interface, communicated with described UE by described Uu interface；Be additionally operable to by wireless backhaul link with Logic S1 interface is set up, by described logic S1 interface and described gateway node between described gateway node Communication；It is additionally operable to by wireless backhaul link and one of them at least one intermediary routing node described Intermediary routing node sets up wireless backhaul Ub interface, by described Ub interface and described intermediary routing node Communication；

Described intermediary routing node, is used for by wireless backhaul link and described initial access node, and/ Or described gateway node, and/or between other intermediary routing node, set up wireless backhaul Ub interface, pass through Described Ub interface realizes data relay transmission between described initial access node and gateway node；

Described gateway node, for by setting up S1 between wired backhaul and described equipment of the core network Interface, by described S1 interface and described equipment of the core network communication；It is additionally operable to pass through wireless backhaul link And set up wireless backhaul Ub between one of them routing node of at least one intermediary routing node described to connect Mouthful, by described Ub interface and described intermediary routing node communication；It is additionally operable to pass through wireless backhaul link And set up logic S1 interface between described initial access node, by described logic S1 interface with described at the beginning of Beginning access node communicates.

Wherein, described gateway node includes the first protocol stack, second protocol stack and the 3rd protocol stack；

Wherein said first protocol stack is for carrying between described gateway node and described equipment of the core network S1 interface；Described second protocol stack is for carrying between described gateway node and described initial access node Logic S1 interface；Described 3rd protocol stack is used for carrying described gateway node and route in the middle of one Ub interface between node；

Described first protocol stack, when for carrying the chain of command of described S1 interface, the most successively Including L1 layer, L2 layer, Internet Protocol IP layer, SCTP SCTP layer and S1 interface Application protocol S1-AP layer；When for carrying the user face of described S1 interface, wrap the most successively Include L1 layer, L2 layer, IP layer, UDP UDP layer and user face GPRS Tunnel Protocol GTP-U layer；

Described second protocol stack, when for carrying the chain of command of described logic S1 interface, from top to bottom Include IP layer, SCTP layer and S1-AP protocol layer successively；When for carrying described logic S1 interface During user face, include IP layer, UDP layer and GTP-U layer the most successively；

Described 3rd protocol stack includes using WLAN WLAN technology to realize the most successively Physical layer PHY, media get involved mac layer and logical link control LLC layer；

Wherein, described second protocol stack is carried on described 3rd protocol stack.

Wherein, described 3rd protocol stack also includes:

IP layer, is positioned on LLC layer.

Wherein, described gateway node realizes the gateway proxy between described UE and described equipment of the core network, Specifically include:

Carry EPS bearer for the evolved packet system of described UE and set up two GTP-U tunnels, one Build on equipment of the core network gateway S-GW/ grouped data network gateway P-GW and described gateway node Between, another builds between described gateway node and described initial access node；

Wherein, the GTP-U tunnel between described equipment of the core network S-GW/P-GW and described gateway node It is carried on the S1 interface between described gateway node and described equipment of the core network；Described gateway node with GTP-U tunnel between described initial access node is carried on described gateway node and is initially accessed with described Between node logic S1 interface on.

Wherein, described gateway node as the gateway proxy between described UE and described equipment of the core network, Complete the mapping one to one between said two GTP-U tunnel.

Wherein, described gateway node realizes described initial access node S-GW/P-GW agent functionality, tool Body includes:

For the foundation of described initial access node for carrying all UE's of the described initial access node of access The evolved packet system node aggregation carrying EPS-node bearer of EPS bearer；At described gateway node Set up for carrying described EPS-node bearer's with on the logic S1 interface of described initial access node GTP-U tunnel.

Wherein, described gateway node completes the first protocol stack carrying described S1 interface and carries described Ub Between the second protocol stack of interface, the conversion of the following protocol layer of link layer including link layer, the completeest Become:

The L1 layer of the first protocol stack and L2 layer and the LLC layer of second protocol stack, MAC layer and PHY Conversion between Ceng；

When described gateway node completes the conversion of described protocol layer, the protocol layer on link layer does not changes；

Described gateway node is according to the transforming relationship within gateway node, by source link layer and following protocol layer It is converted into Target Link-Layer and protocol layers below.

Wherein, described initial access node includes the 4th protocol stack, the 5th protocol stack and the 6th protocol stack；

Wherein, described 4th protocol stack is for carrying the Uu between described initial access node and described UE Interface；Described 5th protocol stack is for carrying patrolling between described initial access node and described gateway node Collect S1 interface；Described 6th protocol stack is used for carrying described initial access node road middle with one By the Ub interface between node；

Described 4th protocol stack, when for carrying the chain of command of described Uu interface, the most successively Including PHY layer, MAC layer, wireless spread-spectrum technology rlc layer, PDCP PDCP Layer, radio resource control RRC layer and non-access NAS layer；When the use for carrying described Uu interface During face, family, include PHY layer, MAC layer, rlc layer and PDCP layer the most successively；

Described 5th protocol stack, when for carrying the chain of command of described logic S1 interface, from top to bottom Include IP layer, SCTP layer and S1-AP layer successively；As the user for carrying described logic S1 interface During face, include IP layer, UDP layer and GTP-U layer the most successively；

Described 6th protocol stack, includes PHY, the MAC using WLAN technology to realize the most successively With LLC protocol layer；

Wherein, described 4th protocol stack is carried on described 5th protocol stack.

Wherein, described 6th protocol stack also includes:

IP layer, is positioned on LLC layer.

Wherein, described initial access node establishes the EPS of described UE between described gateway node Behind bearer GTP-U tunnel between described initial access node and described gateway node, described initially Access node and described UE set up radio bearer RB, described initial access node on described Uu interface Mapping one to one between described EPS bearer and described RB is set.

Wherein, described initial access node completes the 4th protocol stack carrying described Uu interface and carrying institute The conversion of the following protocol layer of link layer stated between the 6th protocol stack of Ub interface including link layer, Specifically complete:

The LLC of the 4th protocol stack, MAC, PHY protocol layer and the L1 layer of the 6th protocol stack and L2 layer Between conversion；

When described initial access node completes the conversion of described protocol layer, the protocol layer on link layer does not occurs Change；

Described initial access node according to the transforming relationship within initial access node, by source link layer and with Lower protocol layer is converted into Target Link-Layer and following view layer.

Wherein, described intermediary routing node include the 7th protocol stack, the 7th protocol stack be used for carrying described in Between routing node and described initial access node and/or described gateway node and/or other intermediary routing node Between Ub interface；

Described 7th protocol stack, the most successively include use WLAN technology realize PHY and MAC layer and LLC layer.

Wherein, described 7th protocol stack also includes:

IP layer, is positioned on LLC layer.

Gateway node in a kind of multi-hop communication system, in a communication path of described multi-hop communication system Including user equipment (UE), initial access node, at least one intermediary routing node, a gateway Node and equipment of the core network, described gateway node is characterised by, for by wired backhaul and institute State and between equipment of the core network, set up S1 interface, by described S1 interface and described equipment of the core network communication； It is additionally operable to one of them routing node by wireless backhaul link Yu at least one intermediary routing node described Between set up wireless backhaul Ub interface, by described Ub interface and described intermediary routing node communication；Also For by setting up logic S1 interface between wireless backhaul link and described initial access node, by institute State logic S1 interface and described initial access node communication.

Described 3rd protocol stack the most successively include use WLAN technology realize physical layer PHY, Media get involved mac layer and logical link control LLC layer；

Wherein, described 3rd protocol stack also includes:

IP layer, is positioned on LLC layer.

A kind of initial access node in multi-hop communication system, a communication lines of described multi-hop communication system Footpath include user equipment (UE), initial access node, at least one intermediary routing node, one Gateway node and equipment of the core network, described initial access node is characterised by, is used for passing through wireless access Set up wireless access Uu interface between link and described UE, led to described UE by described Uu interface Letter；It is additionally operable to, by setting up logic S1 interface between wireless backhaul link and described gateway node, pass through Described logic S1 interface and described gateway node communication；Be additionally operable to by wireless backhaul link with described extremely One of them intermediary routing node in a few intermediary routing node sets up wireless backhaul Ub interface, logical Cross described Ub interface and described intermediary routing node communication.

Wherein, described 6th protocol stack also includes:

IP layer, is positioned on LLC layer.

A kind of intermediary routing node in multi-hop communication system, a communication lines of described multi-hop communication system Footpath include user equipment (UE), initial access node, at least one intermediary routing node, one Gateway node and equipment of the core network, described intermediary routing node is characterised by, is used for passing through wireless backhaul Link and described initial access node, and/or described gateway node, and/or other intermediary routing node it Between set up wireless backhaul Ub interface, by described Ub interface realize data at described initial access node and Relay transmission between gateway node.

Wherein, described 7th protocol stack also includes:

IP layer, is positioned on LLC layer.

The embodiment that the present invention provides, is ensureing backwards compatibility, is reducing the premise of the impact on core net Under, it is achieved the low transmission time delay in UDN network, low cost multi-hop communication system.

Accompanying drawing explanation

Fig. 1 is the network topology schematic diagram of cellular radio access network in prior art；

Fig. 2 be cellular radio access network in the prior art specific region in dispose UDN signal Figure；

Fig. 3 is the super-intensive network design schematic diagram in certain area；

Fig. 4 is the system architecture diagram of LTE macrocellular wireless communication system in prior art；

Fig. 5 is the UE schematic diagram through double bounce wireless backhaul core network access；

Fig. 6 is the protocol stack structure schematic diagram of the present invention a kind of double bounce communication system；

Fig. 7 is the technology of the present invention method protocol stack structure schematic diagram for single-hop communication system；

Fig. 8 is the down user data of the present invention transmittance process figure in system shown in the present invention；

Fig. 9 is the structured flowchart of a kind of access network equipment that the multi-hop communication system according to the present invention proposes.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing and concrete The present invention is described in further detail for embodiment.It should be noted that in the case of not conflicting, Embodiment in the application and the feature in embodiment can mutual combination in any.

For meeting the expection that thousands of times of portfolios of coming 10 years increase, UDN will be widely deployed to undertake A large number of services flow.UDN can be deployed in indoor, outdoor hot spot region or any have high traffic The region of demand.Fig. 3 is the super-intensive network design schematic diagram in a certain area, it is considered to actual portion The infrastructure of administration's network limits, and the most such as in shown region, wired network port number is wired, with And be CAPEX and OPEX not increasing Disposition & Operation network, it is achieved flexibly and fast dispose this network, In the SRAN-node of shown in Fig. 38, the position that only minor node 303 and 310 is disposed has wired The network port, i.e. can be connected to equipment of the core network, OAM by wire-line back haul shown in solid black in figure Equipment etc., as 303 may be coupled to equipment 302, and 310 may be coupled to equipment 301.And other The position that 6 minor nodes are disposed all does not has wired network port, and therefore these minor nodes can only pass through this Wireless backhaul between a little minor nodes and around other minor nodes, through one jump wireless backhaul or multi-hop without Line backhaul is connected to minor node 303 or minor node 310, eventually through minor node 303 or 310 Cable port is connected to equipment of the core network, OAM equipment etc..

For the subscriber equipment (User Equipment, UE) in UDN, such as the UE in figure 311,311 access the minor node 308 of its position by wireless access links (radio access link), Data transmission between 311 and equipment of the core network 302, needs by 308 between 308 and 305 Wireless backhaul link is transmitted, then by the 305 wireless backhaul link transmission between 305 and 303, Just can be completed by the wired backhaul between 303 and 302 eventually, namely leading between 311 and 302 Letter, intermediate demand is through double bounce wireless backhaul link.All of minor node in Fig. 3, on the one hand can lead to Cross wireless access links to communicate with UE, on the other hand can pass through other of wireless backhaul link and surrounding Little base station communicates.

Fig. 4 is that the medium-term and long-term evolution of prior art (Long Term Evaluation, LTE) macrocellular is wireless The system architecture diagram of communication system, LTE system employing internet protocol-based (Internet Protocol, IP) flat architecture, by Universal Terrestrial Radio Access Network (the Evolved Universal of evolution Terrestrial Radio Access Network, E-UTRAN), evolved data core net (Evolved Packet Core, EPC) composition.Wherein EPC includes: mobile management unit (Mobility Management Entity, MME), gateway (Serving Gateway, S-GW), grouped data network gateway (PDN Gateway, P-GW).Wherein MME be responsible for chain of command management, including mobile management, The process of Non-Access Stratum signaling, the chain of command such as the context management work of user；S-GW is responsible for UE and uses Transmission, forwarding and the route handoff etc. of face, family data；P-GW is to connect EPC and bag data network such as interconnection The node of net, is responsible for distribution, IP packet such as UE IP address and is filtered into business datum by type of service Stream (service data flow) is also tied to corresponding transmission carrying.E-UTRAN includes each macro base station (eNB)。

In Fig. 4, each eNB is connected to EPC by S1 interface, including by chain of command S1-MME Interface is connected with MME, is connected with S-GW/P-GW by user face S1-U interface.When having UE's When user face data needs to transmit, MME can set up the EPS bearer for transmitting data for UE (Evolved Packet System bearer), concrete, by MME control S-GW/P-GW with GTP-U (the GPRS for transmitting UE user face data is set up between the eNB that UE is accessed Tunnelling Protocol User Plane, GTP-U) tunnel, then UE is (for UE to P-GW Send data) or P-GW (sending data to UE for P-GW) advised according to GTP-U agreement Fixed packet encapsulation form is carried on institute after the user face data of UE is packaged into GTP-U packet State on the GTP-U tunnel of foundation, complete via the GTP-U tunnel between described eNB and described P-GW Become the transmission of UE user face data.It should be noted that S-GW and P-GW may be located at same On physical equipment, it is also possible to be positioned on different physical equipments, when S-GW and P-GW is positioned at different Time on physical equipment, it is also required to set up one section for this EPS bearer between the two and is positioned at S-GW and P-GW Between GTP-U tunnel.

In Fig. 4, connected by X2 interface between each eNB, need when there being UE user face data Between two eNB during transmission, set up for transmitting UE user face data between these two eNB GTP-U tunnel, then eNB according to the packet encapsulation form of GTP-U agreement defined by UE's User face data is carried on after being packaged into GTP-U packet on the GTP-U tunnel of described foundation, warp The transmission of UE user face data is completed by the GTP-U tunnel between said two eNB.

For the UE in UDN, after UE accesses a minor node, the transmission of its data is very possible Need by this minor node, jumped even multi-hop wireless backhaul by this minor node through one the most again and be connected to one Core net just can be transferred to after individual or multiple other minor node.As a example by UE 311 in Fig. 3, Fig. 5 gives the UE 311 schematic diagram through double bounce wireless backhaul core network access, in the present invention, and will UE accesses minor node, is referred to as this UE's through the path of or multi-hop wireless backhaul core network access Communication path, wherein, the SRAN-node1 in Fig. 5, SRAN-node2, SRAN-node3 are respectively In corresponding diagram 3 308,305,303.When having data to need transmission between UE and S-GW/P-GW, If continuing to use the communication mode of prior art, such as using the communication mode of LTE shown in Fig. 4, needing Will be between S-GW/P-GW and SRAN-node3, between SRAN-node3 and SRAN-node2, And between SRAN-node2 and SRAN-node1, set up the transmission with carrying data of the GTP-U tunnel, This data transfer mode can cause the biggest time delay that data are transmitted the process complexity causing each minor node Degree improves, it is therefore necessary to research is applicable to the multi-hop communication system multi-hop communication framework in other words of UDN.

In the present invention, as a example by Fig. 5, between UE and its minor node SRAN-node1 accessed Wireless access links continues to continue to use the labelling in correlation technique (LTE), is labeled as Uu interface, Wireless backhaul link between SRAN-node is labeled as Ub interface, and SRAN-node3 and MME With the wire-line back haul interface between S-GW/P-GW continues to continue to use the labelling in correlation technique (LTE), It is respectively labeled as S1-MME interface and S1-U interface.In the present invention, each minor node is both supported to pass through Communication between Uu interface and UE, supports again by the communication between Ub interface and other minor nodes.

UE in Fig. 5 is as a example by the communication path of double bounce wireless backhaul core network access, and Fig. 6 is this The protocol stack structure of a kind of double bounce communication system (communication path of UE is double bounce communication path) of invention shows It is intended to.

In multi-hop communication system, a communication path at least includes user equipment (UE), is initially accessed joint Point, one or more intermediary routing node, gateway node and equipment of the core network.Wherein, it is initially accessed joint Point, intermediary routing node, gateway node is SRAN-node, completes different merits in multihop system Energy.Initial access node is the SRAN-node that UE passes through wireless access links access network, such as Fig. 6 In SRAN-node1；Intermediary routing node is to realize leading between initial access node and gateway node Believer in a certain religion and finally realize access initial access node UE and equipment of the core network between communication provide relaying Transmission, such as the SRAN-node2 in Fig. 6；Gateway node is connected to equipment of the core network by wire-line back haul Thus finally realize the communication accessing between UE and the equipment of the core network of initial access node, in Fig. 6 SRAN-node3.

As shown in Figure 6, by relevant radio honeycomb between UE to initial access node SRAN-node1 The wireless access links Uu interface communication of technology, relevant wireless cellular technology such as LTE technology, pass through Between UE and initial access node, set up radio bearer (Radio Bear, RB) realize data biography Defeated, the most as shown in Figure 6, the two ends of Uu interface, UE and SRAN-node1 distinguishes from top to bottom Including physical layer (Physical Layer, PHY) and link layer, link layer specifically includes matchmaker at LTE Body Access Layer (Media Access Control, MAC), wireless chain control layer (Radio Link Control, RLC), packet convergence protocol (Packet Data Convergence Protocol, PDCP), If being used for transmitting chain of command information on Uu interface, then also include wireless at UE end on PDCP layer Resource Control Layer (Radio Resource Control, RRC) and non-access key-course (Non-Access-Stratum, NAS), SRAN-node1 end also includes rrc layer.Need explanation Be present invention correlation technique specifically in LTE system as a example by, but this be not limiting as Uu interface use Other existing correlation technique, such as global system for mobile communications (Global System for Mobile Communication, GSM), (UMTS Universal Mobile Telecommunication System, UMTS) etc. technology, correspond in correlation technique, Uu interface two The protocol layer of end can change according to correlation technique.In the present invention, UE and initial access node By the wireless access links Uu interface communication of relevant wireless cellular technology between SRAN-node1, permissible Ensure backwards compatibility so that lowest version UE existed on market can access the multi-hop of the present invention Communication system, enjoys the network service of UDN.

As shown in Figure 6, wired by relevant wireless cellular technology between gateway node to equipment of the core network Transmission network communicates, and relevant wireless cellular technology such as LTE technology, by setting with core net at gateway node Set up S1 interface between Bei and realize data transmission, concrete, with Fig. 5 as example, gateway node The interface set up between SRAN-node3 and equipment of the core network MME is that (S1 controls S1-MME interface Face interface), the most accordingly, the two ends of S1-MME interface, on SRAN-node3 and MME under Physical layer (Layer1, L1), link layer (Layer2, L2) and transport layer (Transport is included respectively to upper Layer), transport layer is IP-based protocol stack here, includes IP (Internet the most successively Protocol)/SCTP(Stream Control Transmission Protocol)/S1-AP(S1Application Protocol).That sets up between gateway node SRAN-node3 and equipment of the core network S-GW/P-GW connects Mouthful be S1-U interface in the user plane, the most accordingly, S1-U interface two ends, SRAN-node3 with L1, L2 and Transport layer, transport layer here is included the most respectively on S-GW/P-GW It is again based on the agreement of IP, includes IP/UDP (User Datagram Protocol) the most successively /GTP-U.Needing also exist for explanation, the most specifically as a example by LTE system, but this is not limiting as S1 Interface uses other existing correlation techniques, and when being applied in other existing correlation techniques, equipment of the core network Title, and the interface name between gateway node from equipment of the core network may be different with title herein, But the logic function completed and the effect of interface set up are identical.In the present invention, gateway node and core By the wire transmission Network Communication of relevant wireless cellular technology between heart net equipment, can accomplish core net Impact minimum, it might even be possible to say and accomplish zero impact on core net, thus avoid drawing of UDN network Enter and cause the upgrading expense to core net.

Gateway node SRAN-node3 in Fig. 6, is on the one hand the net between UE and equipment of the core network Close agency；On the other hand, optimization, gateway node SRAN-node3 can also is that what UE was accessed The S-GW/P-GW of initial access node SRAN-node1.

Gateway node is the gateway proxy between UE and equipment of the core network, and i.e. from UE, gateway saves Point is the equipment of the core network (MME/S-GW/P-GW) of this UE, and from core net, gateway saves Point is " initial access node " that UE is accessed.Concrete, for an EPS bearer of UE, The present invention will set up two GTP-U tunnels for this EPS bearer, one build on S-GW/P-GW with Between gateway node SRAN-node3, another builds on gateway node SRAN-node3 and UE institute Between the initial access node SRAN-node1 accessed, gateway node as UE and equipment of the core network it Between gateway proxy, the mapping one to one between said two GTP-U tunnel can be completed.Here, UE EPS bearer on equipment of the core network, only exist a section between this equipment of the core network and gateway node GTP-U tunnel, therefore in core net, gateway node is this UE " initial access node ", And the EPS bearer of UE only exist on initial access node this initial access node and gateway node it Between one section of GTP-U tunnel, therefore at UE, gateway node is the equipment of the core network of this UE. In the present invention, gateway node is as the gateway proxy between UE and equipment of the core network, can effectively reduce UE Impact on core net when moving between the SRAN-node of each dense deployment of UDN.

Gateway node is the S-GW/P-GW of the initial access node SRAN-node1 that UE is accessed, tool Body, the present invention carries out data biography for UE by its initial access node accessed and core net Time defeated, the present invention builds between initial access node SRAN-node1 and gateway node SRAN-node3 The node of the SRAN-node1 founding the EPS bearer for carrying all UE on SRAN-node1 gathers Close EPS bearer (for avoid obscuring between UE EPS bearer, here labeled as EPS-node Bearer), between SRAN-node1 and SRAN-node3, foundation is used for carrying this EPS-node bearer GTP-U tunnel (by between the GTP-U tunnel avoided and set up by the EPS bearer of UE Obscure, here labeled as GTP-node-U).In the present invention gateway node as UE accessed initial The S-GW/P-GW of access node, so that the communication between initial access node with core net is similar The data transmission procedure of UE, accomplishes that the additional effect to system is minimum, and system is the simplest.

Above-mentioned two functions completed corresponding to gateway node, i.e. gateway between UE and equipment of the core network The S-GW/P-GW function of agent functionality and initial access node, in Fig. 6 shown in black double arrows Between SRAN-node1 and SRAN-node3, for supporting above two functions (or only gateway support generation Reason function), there is a logic S1 interface, this logic interfacing be carried on SRAN-node1 and On the physical layer of SRAN-node3 wireless backhaul link and link layer, corresponding to chain of command interface under Include IP/SCTP/S1-AP successively to upper, include the most successively corresponding to interface in the user plane IP/UDP/GTP-U。

As the gateway node in multi-hop communication system, SRAN-node3 also needs to and other Being communicated by wireless backhaul link between SRAN-node, therefore, gateway node is except above-mentioned foundation And the S1 interface between equipment of the core network, and realize the gateway proxy merit between UE and equipment of the core network Can, and outside the S-GW/P-GW function realizing the initial access node that UE is accessed optimized, SRAN-node3 also needs to set up wireless backhaul Ub between intermediary routing node SRAN-node2 and connects Mouthful.

Ub interface uses WLAN (Wireless Local Area Network, WLAN) technology Communicate, the two ends of Ub interface, intermediary routing node SRAN-node2 and gateway node PHY, MAC and the logical links control of WLAN technology is included the most respectively on SRAN-node3 Preparative layer (Logical Link Control, LLC), optimization, IP layer can also be included on LLC layer. When packet reaches gateway node SRAN-node3, SRAN-node3 is by link layer and following association View is done and is once changed, and i.e. completes protocol stack (LLC/MAC/PHY) and the S1 interface of Ub mouth WLAN Protocol stack (L1/L2) conversion, during protocol conversion, the protocol stack of Transport-Protocol does not becomes Changing, gateway node SRAN-node3 is according to Internal reforming relation, by source link layer and following protocol conversion Become Target Link-Layer and following agreement.If also having IP layer, then gateway node SRAN-node3 on LLC layer When carrying out protocol conversion, when the data from S1 interface are converted into the data of Uu interface, increase IP Layer, pass through increased IP layer can realize the packet of UE in multi-hop communication system of the present invention each Route between SRAN-node, concrete IP layer realizes multihop routing, and correlation technique is the most highly developed, The present invention repeats no more.If not having IP layer on LLC layer, the packet of UE is at multi-hop communication of the present invention Route between each SRAN-node in system, realizes according to route technology relevant in WLAN technology, Such as realizing according to the wireless mesh network technology (MESH) of WLAN, concrete can be according to 802.11s Agreement (Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications Amendment 10:Mesh Networking) realize, the present invention is not Repeat again.

Same, as the initial access node in multi-hop communication system, SRAN-node1 mono-aspect is built Found the Uu interface between UE, Uu interface is set up radio bearer and transmits to realize data, another Aspect and as setting up logic S1 interface between the gateway node of its S-GW/P-GW, in addition, SRAN-node1 also needs to be communicated by wireless backhaul link between other SRAN-node, builds Vertical with the intermediary routing node SRAN-node2 in other SRAN-node, such as Fig. 6 between wireless Backhaul Ub interface.Same, Ub interface uses WLAN technology to communicate, the two ends of Ub interface, Wrap the most respectively on initial access node SRAN-node1 and intermediary routing node SRAN-node2 Including the PHY of WLAN technology, MAC and LLC layer, optimization, can also include on LLC layer IP layer.When packet arrives initial access node SRAN-node1, on the one hand SRAN-node1 root According to set up on the logic S1 interface between SRAN-node3 and SRAN-node1 EPS bearer and Set up mapping relations during RB on Uu interface between SRAN-node1 and UE, complete packet and exist Mapping between EPS bearer and RB bear, wherein SRAN-node1 is between SRAN-node3 After establishing the GTP-U tunnel for carrying described EPS bearer, SRAN-node1 exists Set up RB on Uu interface between SRAN-node1 and UE, and SRAN-node1 arranges EPS Mapping one to one between bearer and RB.On the other hand SRAN-node1 is by link layer and following Agreement is done and is once changed, and i.e. completes protocol stack (LLC/MAC/PHY) and the Uu of Ub mouth WLAN Protocol stack (PDCP/RLC/MAC/PHY) conversion of interface, during protocol conversion, more than link layer Protocol stack does not changes, and SRAN-node1 is according to Internal reforming relation, by source link layer and following association View is converted into Target Link-Layer and following agreement.

Intermediary routing node is the communication realized between initial access node and gateway node thus finally realizes Access the communication between UE and the equipment of the core network of initial access node and relay transmission is provided, therefore middle Wireless backhaul Ub interface is set up between other SRAN-node that routing node communicates with, in Fig. 6, Intermediary routing node SRAN-node2 and initial access node SRAN-node1 and gateway node SRAN-node3 sets up Ub interface, on two end nodes of Ub interface, retains the most respectively The PHY of WLAN technology, MAC and LLC layer, can also include IP layer on the LLC layer of optimization. In the present invention, Ub interface use the physical layer of WLAN technology and link layer are transmitted, on the one hand Can reduce propagation delay time, on the other hand, can be minimum with the multihop routing in simple realization multihop system Change SRAN equipment and the expense of multihop system.

It should be noted that in the agreement station structure schematic diagram of the double bounce communication system shown in Fig. 6, three SRAN-node, SRAN-node1, SRAN-node2, SRAN-node3 are respectively institute in figure 6 State the initial access node of UE, intermediary routing node and gateway node, in actual application, to other UE For, these three node all can also may be used as the initial access node of other UE, SRAN-node1 Using the intermediary routing node as other UE.

Use the technical method of the present invention, backwards compatibility can ensured, reduce the impact on core net On the premise of, it is achieved the low transmission time delay in UDN network, low cost multi-hop communication system.Additionally, Need explanation, the technical method shown in the present invention, can equally be well applied in UDN wireless by single-hop The scene of the communication that backhaul is carried out, if Fig. 7 is the technology of the present invention method agreement for single-hop communication system Stack architecture schematic diagram, in figure, the Uu interface between UE and initial access node SRAN-node1 is with figure Uu interface in 6, the same Fig. 6 of S1 interface between gateway node SRAN-node3 and equipment of the core network In S1 interface, the function that access node SRAN-node1 and gateway node SRAN-node3 are realized Respectively with SRAN-node1 and SRAN-node3, SRAN-node1 and the SRAN-node3 in Fig. 6 Between Ub interface with description to Ub interface in Fig. 6.

Based on the double bounce communication system protocol stack architecture schematic diagram shown in Fig. 6, Fig. 8 gives this double bounce and leads to User's downlink data transmittance process in systems under communication system, including:

Step 801, EPS bearer and associated tunnel and radio bearer are set up

When UE shown in Fig. 6 has downlink business to need transmission, under the control of equipment of the core network MME, Set up for this UE and carry the EPS bearer of this UE downlink data transmission and be used for carrying this EPS The associated tunnel of bearer and radio bearer.Specifically include:

Under MME control, at the initial access node that S-GW/P-GW and UE is accessed SRAN-node1 is connected to eventually through wireline interface between the gateway node SRAN-node3 of core net Set up one section of GTP-U tunnel for carrying this EPS bearer, and at described gateway node Set up between SRAN-node3 and described initial access node SRAN-node1 and be used for carrying this EPS The other end GTP-U tunnel of bearer, and described two sections of GTP-U tunnels are set at SRAN-node3 The one-to-one relationship in road.

Under MME or SRAN-node3 controls, set up to be used for carrying on SRAN-node1 and own The EPS-node bearer of the SRAN-node1 of the EPS bearer of UE and carry this EPS-node GTP-node-U tunnel between SRAN-node1 and SRAN-node3 of bearer.

Receive set up the notice of described EPS bearer for this UE after at SRAN-node1, SRAN-node1 sets up for described in Uu interface bearing under controlling between SRAN-node1 and UE The RB of EPS bearer, and between described RB and EPS bearer is set at SRAN-node1 One corresponding relation.

It should be noted that, according to the business demand of UE, can be that described UE sets up multiple EPS bearer And associated tunnel and radio bearer one to one.

It should be noted that in the transmittance process of downlink data of the present invention, the bang path of downlink data is Be sized, i.e. data pass to SRAN-node3 from core net, then from SRAN-node3 through centre Routing node SRAN-node2 transmission SRAN-node1, the selection course in concrete path has relevant skill Art determines, not in the present invention program category.

802, UE packet is packaged into EPS bearer on the GTP-U tunnel of S1 interface, transmission To SRAN-node3.

When the packet having UE reaches core net, S-GW/P-GW is special according to the business of described packet Property, being carried to correspondence meets on the EPS bearer of traffic performance, and concrete installs to data envelope Corresponding EPS bearer, on the GTP-U tunnel of S1 interface, passes to SRAN-node3.

803, SRAN-node3 receives after the data of core net, carries out following operation:

(1) SRAN-node3 decapsulation is from the packet of S1 interface, by the data after decapsulation Encapsulating installs to this EPS bearer logic S1 interface between SRAN-node3 and SRAN-node1 On GTP-U tunnel, the packet then encapsulation obtained be encapsulated into again at SRAN-node3 and It it is the GTP-node-U tunnel of the EPS-node bearer foundation of SRAN-node1 between SRAN-node1 On road；

Concrete, here the data after decapsulation are encapsulated into this EPS bearer at SRAN-node3 And on the GTP-U tunnel of the logic S1 interface between SRAN-node1, its essence is this EPS The bearer one section of GTP-U tunnel between core net and SRAN-node3 with SRAN-node3 with Changing between one section of tunnel between SRAN-node1, concrete conversion includes the transmission changing tunnel Layer address (Transport Layer address), GTP tunnel Endpoint ID (GTP Tunnel Endpoint Identifier, GTP TEIDs) etc..

(2) packet that described encapsulation completes is transformed into the association of Ub interface WLAN by SRAN-node3 It is transmitted on view stack, passes to SRAN-node2；

804, after SRAN-node2 receives packet, according to route, packet is forwarded to On Ub interface between SRAN-node2 and SRAN-node1, pass to SRAN-node1.

According to preceding description, in the present invention downlink data bang path it has been determined that concrete route by IP layer realizes, or can be by route technology relevant in WLAN technology.

805, after SRAN-node1 receives packet, packet is decapsulated, according to described EPS bearer With the corresponding relation of the RB of described Uu interface, the packet after decapsulation is transformed into Uu interface On protocol stack, the packet being packaged on Uu interface RB transmission is sent to UE.So far, downlink data It is delivered to UE.

The multi-hop communication system proposed according to the present invention, the present invention also proposes a kind of access network equipment, and this connects Log equipment is applied to wireless access network minor node or base station etc., as shown in Figure 9.

When this access network equipment at least initially connecing as user equipment (UE) in described multi-hop communication system When ingress occurs, at least include with lower module:

901 protocol stack translation modules: realize link layer and the conversion of following protocol layer, concrete implementation Ub The protocol stack (LLC/MAC/PHY) of mouth WLAN and the protocol stack of Uu interface (PDCP/RLC/MAC/PHY) conversion；

902Uu functional module interface: realize setting up the Uu interface between UE, corresponding to Uu interface Include the protocol layers such as PHY/MAC/RLC/PDCP the most respectively；It is embodied as UE EPS bearer Uu interface is set up the radio bearer of correspondence；

903S1 functional module interface: realize setting up logic S1 between its gateway node finally connected Interface, on described S1 interface and between gateway node, foundation is for carrying the EPS bearer's of UE GTP-U tunnel and foundation are for carrying the GTP-node-U tunnel of the EPS-node bearer of himself. Corresponding to the chain of command of S1 interface, include the protocol layers such as IP/SCTP/S1-AP the most successively, right The protocol layers such as IP/UDP/GTP-U should be included the most successively in the user face of S1 interface；

904Ub functional module interface: realize setting up it and (such as realize middle road with other access network equipments By nodal function or the access network equipment of gateway node function) between Ub interface, corresponding to Ub Interface includes the protocol stack (LLC/MAC/PHY) of WLAN the most respectively, the most all right Including ip protocol layer；

When this access network equipment at least occurs as gateway node in described multi-hop communication system, at least Including with lower module:

901 protocol stack translation modules: realize link layer and the conversion of following protocol layer, concrete implementation Ub The protocol stack (LLC/MAC/PHY) of mouth WLAN is changed with the protocol stack (L1/L2) of S1 interface；

903S1 functional module interface: realize set up with equipment of the core network (MME/S-GW/P-GW) it Between S1 interface, set up on described S1 interface and between equipment of the core network for carrying the EPS of UE The GTP-U tunnel of bearer；

Realize setting up the logic S1 interface between initial access node；

Corresponding to the chain of command of S1 interface, include the protocol layers such as IP/SCTP/S1-AP the most successively, User face corresponding to S1 interface includes the protocol layers such as IP/UDP/GTP-U the most successively；

904Ub functional module interface: realize setting up it and (such as realize middle road with other access network equipments By nodal function or the access network equipment of initial access node function) between Ub interface, correspond to Ub interface includes the protocol stack (LLC/MAC/PHY) of WLAN the most respectively, preferably also Ip protocol layer can be included；

906 initial access node core net function porxy modules: realize initial access node S-GW/P-GW agent functionality, between initial access node set up S1 interface on be initially accessed The GTP-node-U being used for carrying the EPS-node bearer of described initial access node is set up between node Tunnel；

907 gateway proxy functions: realize UE and the net of equipment of the core network (MME/S-GW/P-GW) Close agent functionality, including:

And set up the GTP-U tunnel being used for carrying the EPS bearer of UE between initial access node, with And complete institute between the GTP-U tunnel of described foundation and 903S1 functional module interface and equipment of the core network The mapping one to one between the GTP-U tunnel of the described EPS bearer carrying described UE set up Relation.

When this access network equipment at least occurs as intermediary routing node in described multi-hop communication system, At least include with lower module:

904Ub functional module interface: realize setting up it and (such as realize gateway to connect with other access network equipments Access point function or the access network equipment of initial access node function) between Ub interface, corresponding to Ub Interface includes the protocol stack (LLC/MAC/PHY) of WLAN the most respectively, the most all right Including ip protocol layer；

905 data relaying sending modules: realize, after source access network equipment receives data, being transmitted to target Access network equipment；

It should be noted that described access network equipment is in described multi-hop communication system, it is provided that multiple Node identities exists, and such as one access network equipment can be i.e. as the middle road of initial access node conduct again Existed by node, then this access network equipment provides as in function during initial access node and conduct simultaneously Between routing node time function；For another example, an access network equipment can i.e. as initial access node again Exist as gateway node, then this access network equipment provide as function during initial access node simultaneously and As function during gateway node.

According to the access network equipment in multi-hop communication system set forth above and multi-hop communication system, below Each node in multi-hop communication system of the present invention is illustrated:

Gateway node in a kind of multi-hop communication system, in a communication path of described multi-hop communication system Including user equipment (UE), initial access node, at least one intermediary routing node, a gateway Node and equipment of the core network, wherein said gateway node, for by wired backhaul and described core S1 interface is set up, by described S1 interface and described equipment of the core network communication between net equipment；It is additionally operable to By building between one of them routing node of wireless backhaul link and at least one intermediary routing node described Vertical wireless backhaul Ub interface, by described Ub interface and described intermediary routing node communication；It is additionally operable to lead to Cross and between wireless backhaul link and described initial access node, set up logic S1 interface, by described logic S1 interface and described initial access node communication.

Described first protocol stack, when for carrying the chain of command of described S1 interface, the most successively Including L1 layer, L2 layer, IP layer, SCTP SCTP layer and S1 interface application protocol S1-AP Layer；When for carrying the user face of described S1 interface, include the most successively L1 layer, L2 layer, IP layer, UDP UDP layer and user face GPRS Tunnel Protocol GTP-U layer；

Wherein, described 3rd protocol stack also includes:

IP layer, is positioned on LLC layer.

A kind of initial access node in multi-hop communication system, a communication lines of described multi-hop communication system Footpath include user equipment (UE), initial access node, at least one intermediary routing node, one Gateway node and equipment of the core network, wherein said initial access node, for by wireless access links with Set up wireless access Uu interface between described UE, communicated with described UE by described Uu interface；Also For by setting up logic S1 interface between wireless backhaul link and described gateway node, being patrolled by described Collect S1 interface and described gateway node communication；Be additionally operable to by wireless backhaul link with described at least one One of them intermediary routing node in intermediary routing node sets up wireless backhaul Ub interface, by described Ub interface and described intermediary routing node communication.

Wherein, described 6th protocol stack also includes: IP layer, is positioned on LLC layer.

LLC layer, MAC layer and the PHY layer of the 4th protocol stack and the L1 layer of the 6th protocol stack and L2 Conversion between Ceng；

A kind of intermediary routing node in multi-hop communication system, a communication lines of described multi-hop communication system Footpath include user equipment (UE), initial access node, at least one intermediary routing node, one Gateway node and equipment of the core network, wherein said intermediary routing node, for by wireless backhaul link with Set up between described initial access node, and/or described gateway node, and/or other intermediary routing node Wireless backhaul Ub interface, realizes data by described Ub interface and saves at described initial access node and gateway Relay transmission between point.

Wherein, described 7th protocol stack also includes: IP layer, is positioned on LLC layer.

As seen from the above, ensureing backwards compatibility, on the premise of reducing the impact of core net, real Low transmission time delay in existing UDN network, low cost multi-hop communication system.

One of ordinary skill in the art will appreciate that all or part of step of above-described embodiment can make to use tricks Calculation machine program circuit realizes, and described computer program can be stored in a computer-readable recording medium, Described computer program performs (such as system, unit, device etc.) on corresponding hardware platform, Upon execution, including one or a combination set of the step of embodiment of the method.

Alternatively, all or part of step of above-described embodiment can also use integrated circuit to realize, this A little steps can be fabricated to integrated circuit modules one by one respectively, or by the multiple modules in them or Step is fabricated to single integrated circuit module and realizes.So, the present invention is not restricted to any specific hard Part and software combine.

Each device/functional module/functional unit in above-described embodiment can use general calculating device Realizing, they can concentrate on single calculating device, it is also possible to is distributed in multiple calculating device institutes group On the network become.

Each device/functional module/functional unit in above-described embodiment realizes with the form of software function module And during as independent production marketing or use, can be stored in a computer read/write memory medium. Computer read/write memory medium mentioned above can be read only memory, disk or CD etc..

The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited to In this, any those familiar with the art, can be easily in the technical scope that the invention discloses Expect change or replace, all should contain within protection scope of the present invention.Therefore, the protection of the present invention Scope should be as the criterion with the protection domain described in claim.

Claims

1. a multi-hop communication system a, it is characterised in that communication path of described multi-hop communication system Include user equipment (UE), initial access node, at least one intermediary routing node, a net Articulare and equipment of the core network, wherein:

System the most according to claim 1, it is characterised in that:

Described gateway node includes the first protocol stack, second protocol stack and the 3rd protocol stack；

System the most according to claim 2, it is characterised in that described 3rd protocol stack also includes:

IP layer, is positioned on LLC layer.

4. according to the arbitrary described system of claims 1 to 3, it is characterised in that described gateway node is real Existing gateway proxy between described UE and described equipment of the core network, specifically includes:

System the most according to claim 4, it is characterised in that:

Described gateway node, as the gateway proxy between described UE and described equipment of the core network, completes institute State the mapping one to one between two GTP-U tunnels.

6. according to the arbitrary described system of claims 1 to 3, it is characterised in that described gateway node is real Existing described initial access node S-GW/P-GW agent functionality, specifically includes:

7. according to the arbitrary described system of claims 1 to 3, it is characterised in that

Described gateway node completes the first protocol stack carrying described S1 interface and carries described Ub interface The conversion of the following protocol layer of the link layer including link layer between second protocol stack, specifically completes:

System the most according to claim 1, it is characterised in that

Described initial access node includes the 4th protocol stack, the 5th protocol stack and the 6th protocol stack；

System the most according to claim 8, it is characterised in that described 6th protocol stack also includes:

IP layer, is positioned on LLC layer.

10. according to the system described in claim 1 or 4 or 8, it is characterised in that

Described initial access node establishes the EPS bearer of described UE between described gateway node Behind GTP-U tunnel between described initial access node and described gateway node, described in be initially accessed joint Point and described UE set up radio bearer RB on described Uu interface, and described initial access node arranges institute State the mapping one to one between EPS bearer and described RB.

11. according to the system described in claim 1 or 8, it is characterised in that

Described initial access node completes the 4th protocol stack carrying described Uu interface and carries described Ub Between 6th protocol stack of interface, the conversion of the following protocol layer of link layer including link layer, the completeest Become:

12. systems according to claim 1, it is characterised in that

Described intermediary routing node includes that the 7th protocol stack, the 7th protocol stack are used for carrying route in the middle of described Between node and described initial access node and/or described gateway node and/or other intermediary routing node Ub interface；

13. systems according to claim 12, it is characterised in that described 7th protocol stack also includes:

IP layer, is positioned on LLC layer.

Gateway node in 14. 1 kinds of multi-hop communication systems, a communication lines of described multi-hop communication system Footpath include user equipment (UE), initial access node, at least one intermediary routing node, one Gateway node and equipment of the core network, described gateway node is characterised by, is used for passing through wired backhaul And set up S1 interface between described equipment of the core network, led to described equipment of the core network by described S1 interface Letter；It is additionally operable to one of them route by wireless backhaul link with at least one intermediary routing node described Wireless backhaul Ub interface is set up, by described Ub interface and described intermediary routing node communication between node； It is additionally operable to, by setting up logic S1 interface between wireless backhaul link and described initial access node, pass through Described logic S1 interface and described initial access node communication.

15. gateway nodes according to claim 14, it is characterised in that:

16. gateway nodes according to claim 15, it is characterised in that described 3rd protocol stack is also Including:

IP layer, is positioned on LLC layer.

17. according to the arbitrary described system of claim 14 to 16, it is characterised in that described gateway saves Point realizes the gateway proxy between described UE and described equipment of the core network, specifically includes:

18. gateway nodes according to claim 17, it is characterised in that:

19. according to the arbitrary described gateway node of claim 14 to 16, it is characterised in that described net Articulare realizes described initial access node S-GW/P-GW agent functionality, specifically includes:

20. according to the arbitrary described gateway node of claim 14 to 16, it is characterised in that

Initial access node in 21. 1 kinds of multi-hop communication systems, of described multi-hop communication system is led to Letter path include user equipment (UE), initial access node, at least one intermediary routing node, One gateway node and equipment of the core network, described initial access node is characterised by, for by wireless Wireless access Uu interface is set up, by described Uu interface with described between access link and described UE UE communicates；It is additionally operable to by setting up logic S1 interface between wireless backhaul link and described gateway node, By described logic S1 interface and described gateway node communication；It is additionally operable to by wireless backhaul link and institute State one of them intermediary routing node at least one intermediary routing node and set up wireless backhaul Ub interface, By described Ub interface and described intermediary routing node communication.

22. initial access node according to claim 21, it is characterised in that described in be initially accessed Node includes the 4th protocol stack, the 5th protocol stack and the 6th protocol stack；

23. initial access node according to claim 22, it is characterised in that described 6th agreement Stack also includes:

IP layer, is positioned on LLC layer.

24. according to the initial access node described in claim 21 or 22, it is characterised in that

25. initial access node according to claim 22, it is characterised in that

Intermediary routing node in 26. 1 kinds of multi-hop communication systems, of described multi-hop communication system is led to Letter path include user equipment (UE), initial access node, at least one intermediary routing node, One gateway node and equipment of the core network, described intermediary routing node is characterised by, for by wireless Back haul link and described initial access node, and/or described gateway node, and/or route joint in the middle of other Set up wireless backhaul Ub interface between point, realize data by described Ub interface and be initially accessed joint described Relay transmission between point and gateway node.

27. systems according to claim 26, it is characterised in that

28. systems according to claim 27, it is characterised in that described 7th protocol stack also includes:

IP layer, is positioned on LLC layer.