CN102595532A

CN102595532A - Switching type selection method and system in wireless relay system

Info

Publication number: CN102595532A
Application number: CN2011100027833A
Authority: CN
Inventors: 李大鹏; 奚进; 王冠宙; 翟恒星
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-01-07
Filing date: 2011-01-07
Publication date: 2012-07-18

Abstract

The invention discloses a switching type selection method and system in a wireless relay system. The switching type selection method comprises the following steps: a host base station DeNB (Donor-eNB) compares self mobility management entity (MME) POOL information with MME POOL information of an adjacent eNB and notifies a comparison result to a relay node (RN) connected under the DeNB; and when user equipment (UE) under the RN needs to be switched into a network under the adjacent eNB, the RN selects a switching type for the UE according to the comparison result. The invention simultaneously discloses a switching type selection system for implementing the switching type selection method in the wireless relay system. According to the switching type selection method and system, the appropriate switching type is selected for the UE to be switched, the UE to be switched can be ensured to be switched rapidly, and the switching process is not easy to fail.

Description

Switching type system of selection and system in the wireless relay system

Technical field

The present invention relates to the handoff technique in the repeated link system, relate in particular to switching type system of selection and system in a kind of wireless relay system.

Background technology

Fig. 1 is the sketch map of cellular radio Communication system, and is as shown in Figure 1, and cellular radio Communication system mainly is made up of terminal (UE, User Equipment), wireless access network (RAN, Radio Access Network) and core net (CN, Core Network).The network of being made up of base station or base station and base station controller (not shown) is called RAN, is responsible for the Access Layer affairs, such as the management of Radio Resource.Can there be physics or connection in logic according to actual conditions between the base station.Each base station can be connected with more than one core net.CN is responsible for the Non-Access Stratum affairs, and such as affairs such as position renewals, and CN is the anchor point of user plane.UE is meant the various device that can communicate by letter with cellular radio communication network, such as mobile phone or notebook computer etc.

In cellular radio communication system, the wireless coverage of fixed base stations network causes in the covering of wireless network inevasible existence covering leak such as various building structure to reasons such as stopping of wireless signal owing to various reasons are restricted.In addition on the one hand, the border district in the sub-district, owing to weakening of wireless signal strength, and the interference of neighbor cell, cause UE when cell edge, communication quality is relatively poor, the error rate of wireless transmission high.In order to promote coverage rate, group's mobility, the throughput in cell edge area and the coverage rate of new region, existing a solution is to introduce a kind of wireless network node at cellular radio Communication system, is called relaying (Relay).

Relay has between other network nodes the function through the website of Radio Link relay data and possible control information function, also is via node/relay station (Relay Node/Relay Station).Fig. 2 is for comprising the communication network sketch map of Relay in the prior art, and is as shown in Figure 2, and wherein the UE that directly serves of base station is grand (Macro) UE, and the UE that Relay serves is Relay UE; Link among the figure has:

Link (direct link) direct transfers: the Radio Link between base station and the UE comprises up-downgoing (DL/ULdownlink/uplink) link that direct transfers;

Access link (access link): the Radio Link between Relay and the UE comprises the DL/UL access link;

Back haul link (backhaul link): the Radio Link between base station and the Relay comprises the DL/UL repeated link.

Relay can carry out the data relaying through several different methods; Send wireless signal such as directly amplifying the base station that receives; Perhaps carry out corresponding processing after the Data Receiving with the base station transmission, the packet that correctly receives is transmitted to the terminal again, perhaps base station and relaying cooperation are sent data to the terminal; Correspondingly, the Relay data of also can relaying sending to the base station from the terminal.

In numerous relaying types, there is a kind of relaying to be become type one relaying (Type I relay), its characteristics are following:

For the sub-district under type one relaying and the fixed base stations, UE can't distinguish, and promptly type one relaying originally it seems in UE, is exactly a sub-district, and is as broad as long with the sub-district under the base station, and this moment, this type of sub-district can be called the relaying sub-district.There is the sub-district physical label (PCI of self the relaying sub-district; Physical Cell Identity), sends broadcasting, when UE resides in the relaying sub-district as common sub-district; Use to UE relaying sub-district allocation schedule Radio Resource separately; Can be independent of the wireless resource scheduling of the base station of participating in relaying, the Donor base station that is otherwise known as, promptly Relay is through the base station of backhaul link connection.Interface and protocol stack between relaying sub-district and the Relay UE are with identical between ordinary base station sub-district and the UE.

Type one Relay is called as Relay node (RN, Relay Node), the eNB that is responsible for access style one Relay be called as admit the base station (DeNB, Donor-eNB);

Air interface between RN and the Relay UE is called as the Uu interface;

Air interface between RN and the DeNB is called as the Un interface;

On the Uu interface, all radio access layer chain of command and user plane protocols end in RN;

On the Un interface; At least comprise that wireless medium inserts (MAC; Medium Access Control) protocol layer, Radio Link control (RLC, Radio Link Control) protocol layer, a compression and decompression agreement (PDCP, Packet Data Convergence Protocol) layer.

Fig. 3 is the sketch map of the flat architecture of LTE system in the prior art; As shown in Figure 3; The LTE system adopts the flat architecture of internet protocol-based (IP, Internet Protocol), by the Universal Terrestrial Radio Access Network (E-UTRAN of evolution; Evolved Universal Terrestrial Radio AccessNetwork), CN node and other support nodes are formed; Said CN node comprises: mobile management unit (MME, Mobility Management Entity), gateway (S-GW, Serving Gateway); Wherein MME is responsible for the processing of mobile management, Non-Access Stratum signaling, user's chain of command related works such as the contextual management of mobile management; S-GW is responsible for transmission, forwarding and the route switching etc. of UE user face data; Logically connect mutually between the eNB, be used to support the mobility of UE in whole network, guarantee user's seamless switching through X2 interface; Each eNB is through the S1 interface; Be connected to System Architecture Evolution (SAE; System Architecture Evolution) core net; Promptly link to each other with MME through the control plane S1-MME interface, link to each other with S-GW through the user plane S1-U interface, S1 interface support eNB is connected with multiple spot between MME and the S-GW.Fig. 4 is the structural representation of interface (interface of the X2) protocol stack of S1-MME in the prior art; As shown in Figure 4; The wireless network layer of the protocol stack of the interface of X2 adopts the IP agreement; Transport layer on the network layer is used Stream Control Transmission Protocol, and the application layer of the superiors is the X2-AP agreement of chain of command, uses the signaling of the transmission bearer transmission X2-AP of bottom.Fig. 5 is the structural representation of interface (interface of the X2-U) protocol stack of S1-U in the prior art; As shown in Figure 5, formed transmission bearer by GTP-U/UDP/IP, be used for transmitting the user plane protocol data cell (PDU between the eNB; Protocol DataUnit); Transmission bearer specifically is made up of tunnel endpoint identifier (TEID, Tunnel EndpointIdentifier) and the IP address designation of GTP-U, comprising: source GTP-U TEID, target side GTP-U TEID, source IP address and target side IP address; Wherein udp port number is fixed as 2152, is used for accomplishing the seamless transmission on IPv4 and the IPv6 and GTP-U is a tunnel protocol.

Each eNB carries out the transmission of signaling and data through Uu interface (being defined as the wave point between UTRAN and the UE at first) with UE.

Before introducing RN, there is clear and definite definition in senior Long Term Evolution of the prior art (LTE-A, Long TermEvolution-Advanced) system to X2 interface, i.e. termination X2-AP agreement on RN.

Fig. 6 is the structural representation of supporting the chain of command X2 interface protocol stack of RN in the prior art, and is as shown in Figure 6, has only an X2 interface link between RN and the DeNB, and DeNB has the eNB of X2 interface relation all to have only an X2 interface link with other.DeNB handles and transmits relevant (UE-dedicated) process of all UE between RN and other eNB.The process of non-UE relevant (non-UE-dedicated) is only being handled between RN and the DeNB or between DeNB and other eNB respectively.

Fig. 7 is a typical network architecture sketch map behind the introducing RN network element, and as shown in Figure 7, RN is linked on the DeNB, has the X2 interface link between DeNB and the RN and between DeNB and the eNB.After UE is linked into RN equipment, other network elements be can switch to, for example can DeNB, eNB be switched to through S1 interface or X2 interface.

Fig. 8 is the annexation sketch map between eNB and mobility management apparatus pond (the MME POOL) in the prior art; ENB can be connected through the S1 interface with one or more mobility management apparatus pond (MME POOL); According to prior art; DeNB and in abutting connection with between the eNB in setting up X2 linking relationship process; If DeNB and all preserve mobility management apparatus pond information in abutting connection with eNB, DeNB and need give the other side in the said mobility management apparatus pond group information of setting up exchange self ownership in the flow process in abutting connection with eNB.

Mobility management apparatus pond information comprises one group of group information encoding (GU group ID), and each group information encoding (GU group ID) comprises two fields again, is respectively public land mobile network sign (PLMNID) and MME group id (MME group).

In the prior art; ENB is preferably UE and selects the X2 type to switch; Because switching on time delay and the efficient of the relative S1 type of this switching is higher; But select the switching of X2 type need get rid of the failed handoff scenario that mobility management apparatus pond difference causes, if select the X2 type to switch under inappropriate situation originally, eNB also need reselect the S1 switching and cause more long time delay and efficiency losses behind the X2 handoff failure.In the scene as shown in Figure 8; Certain UE is from the eNB1 access network, and said UE is registered among the MME POOL 1, and said UE need switch to eNB2 from eNB1; The mobility management apparatus pond of eNB2 is MMEPOOL 2; If UE switches to the MME POOL that eNB2 need change registration from eNB1, in this case,, eNB1 select the X2 interface switching will cause handoff failure because of mobility management apparatus pond (MMEPOOL) is different if being UE.

After having introduced RN; At first DeNB has identical mobility management apparatus pond information (MMEPOOL) with RN; RN can obtain this pond group information when setting up X2 interface with its DeNB, specifically, and can be through in setting up the process of X2; RN obtains through the mobility management apparatus pond information of the DeNB that carries in the eNB ConfigurationUpdate message that receives DeNB and send, and RN will belong to the mobility management apparatus pond information of the whole pond of DeNB group information as RN self.Other RN under DeNB also obtain identical mobility management apparatus pond information through identical method.Therefore UE switches to DeNB or when certain RN switched to other RN under the identical DeNB, its mobility management apparatus pond information was on all four, can not have influence on the judgement of switching type from certain RN.Here, DeNB is in abutting connection with the situation of eNB, is meant DeNB and the situation of X2 interface is arranged in abutting connection with eNB.

In the prior art, whether consistent with the mobility management apparatus pond information of self RN be what can't learn in abutting connection with the mobility management apparatus pond information of eNB comparable situation, and therefore when UE switched in abutting connection with eNB, RN can't select switching type accurately for UE.So RN under the prior art condition; Under the suitable situation of X2 type condition; Thereby RN may select the S1 type to switch loss time delay and efficient, and under the inappropriate situation of X2 type condition, RN continues to select the X2 type to switch and causes handoff failure to cause more long time delay and efficiency losses.

Summary of the invention

In view of this, main purpose of the present invention is to provide switching type system of selection in a kind of wireless relay system, can select switching type accurately for the UE that desire is switched, and makes the quick switching of UE and is difficult for failure.

For achieving the above object, technical scheme of the present invention is achieved in that

Switching type system of selection in a kind of wireless relay system comprises:

DeNB compares with mobility management apparatus pond (MME POOL) information of self with MME POOL information in abutting connection with eNB, and the RN that notifies said DeNB to connect down comparative result;

When the UE under the said RN desired to switch to said network under eNB, said RN was that said UE selects switching type according to comparative result.

Preferably, said comparative result comprises:

Comparative type one: the MME POOL information set of said DeNB is the subclass with said MMEPOOL information set in abutting connection with eNB, or the MME POOL information of said DeNB is with identical with said MME POOL information in abutting connection with eNB;

Comparative type two: the MME POOL information set of said DeNB has at least a MME POOL information identical with concentrating with said MMEPOOL information in abutting connection with eNB, and the MME POOL information set of said DeNB is with different with said MME POOL information set in abutting connection with eNB;

Comparative type three: the MME POOL information set of said DeNB is with all different with said any one MME POOL information of concentrating in abutting connection with the MMEPOOL information of eNB.

Preferably, the said RN that notifies said DeNB to connect down comparative result is specially:

For above-mentioned comparative type one, comparative type two, comparative type three are provided with sign respectively, said sign is notified the RN that connects down to said DeNB.

Preferably, said DeNB is that with said DeNB and each and said comparative type in abutting connection with eNB, and said eNB sign notice is given said DeNB the RN of connection down with the mode that comparative type sign sends to RN.

Preferably, said switching type comprises that switching, pass through X2 interface through the S1 interface switches.

Preferably, said RN is that said UE selects switching type to be specially according to comparative result:

Said comparative result is comparative type a period of time, and said RN is that said UE selects to switch through X2 interface;

When said comparative result was comparative type two, said RN was preferably said UE and selects to switch through X2 interface, in the time can not realizing switching through the X2 interface switching, for said UE selects to switch through the S1 interface;

When said comparative result is comparative type three, for said UE selects to switch through the S1 interface.

Preferably, said method also comprises:

When said RN can not obtain comparative result, for said UE selects to switch through the S1 interface.

Switching type selective system in a kind of wireless relay system, said system comprises: DeNB, with said in abutting connection with eNB, the RN that is connected with said DeNB and the UE that is connected with said RN; Wherein,

DeNB is used for comparing with the MME POOL information of self with said MME POOL information in abutting connection with eNB, and notifies said DeNB the RN of connection down with comparative result;

RN when being used for UE under this RN and desiring to switch to said network under eNB, is that said UE selects switching type according to comparative result.

Preferably, said comparative result comprises:

Preferably, for above-mentioned comparative type one, comparative type two, comparative type three are provided with sign respectively, said DeNB further notifies the RN that connects down to said DeNB with said sign.

Preferably, when said RN can not obtain comparative result, for said UE selects to switch through the S1 interface.

The present invention by DeNB determine in advance self MME POOL information and with comparative result in abutting connection with the MME POOL information of eNB; And this comparative result notified the RN that is connected to self; Like this, when with DeNB under the UE that is connected of RN need switch the time, the network node (eNB or RN etc.) of the network belonging that RN switches according to the UE desire and the comparative result of the MME POOL information of DeNB; For to be switched UE selects suitable switching type, thereby realize the quick switching of UE.The present invention can select suitable switching type for to be switched UE, guarantee that to be switched UE realizes switching quickly, and handoff procedure is difficult for failure.

Description of drawings

Fig. 1 is the sketch map of cellular radio Communication system;

Fig. 2 is the operation principle sketch map of Relay in the prior art;

Fig. 3 is the sketch map of the flat architecture of LTE system in the prior art;

Fig. 4 is the structural representation of the protocol stack of the interface of S1-MME in the prior art;

Fig. 5 is the structural representation of the protocol stack of the interface of S1-U in the prior art;

Fig. 6 is a structural representation of supporting the chain of command X2 interface protocol stack of RN in the prior art;

Fig. 7 is a typical network architecture sketch map behind the introducing RN network element;

Fig. 8 is the annexation sketch map between eNB and the mobility management apparatus pond in the prior art;

Fig. 9 is for the RN under the DeNB and in abutting connection with the sketch map that concerns between the mobility management apparatus pond information of eNB;

Figure 10 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention one;

Figure 11 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention two;

Figure 12 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention three;

Figure 13 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention four;

Figure 14 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention five.

Embodiment

The basic thought of the embodiment of the invention is: by DeNB determine in advance self MME POOL information and with comparative result in abutting connection with the MME POOL information of eNB; And this comparative result notified the RN that is connected to self; Like this, when with DeNB under the UE that is connected of RN need switch the time, the network node (eNB or RN etc.) of the network belonging that RN switches according to the UE desire and the comparative result of the MME POOL information of DeNB; For to be switched UE selects suitable switching type, thereby realize the quick switching of UE.

For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.

Before embodiments of the invention are described in detail, at first introduce with reference to the RN under 9 couples of DeNB of figure and in abutting connection with concerning between the mobility management apparatus pond information of eNB.

Fig. 9 is for the RN under the DeNB and in abutting connection with the sketch map that concerns between eNB and the mobility management apparatus pond information, and is as shown in Figure 9, and Fig. 9 is for the RN under the DeNB and in abutting connection with the sketch map that concerns between eNB and mobility management apparatus pond information (MME POOL) information.In the scene one as shown in Figure 9, DeNB is connected respectively on MME POOL 1 and the MME POOL 2, also is connected respectively on MMEPOOL 1 and the MME POOL 2 DeNB and identical in abutting connection with the POOL of eNB in abutting connection with eNB; Under this scene; The optimum selection of RN is that the X2 type is switched; But because RN can't get access in abutting connection with the mobility management apparatus pond information of eNB and the comparable situation of the mobility management apparatus pond information of self, RN is under the situation that lacks Rule of judgment, in order to guarantee the UE success rate for switching; Often select the S1 type to switch, thereby bring unnecessary time delay and efficient to reduce.

In the scene two as shown in Figure 9, DeNB is connected on the MME POOL 1, is connected respectively on MME POOL 1 and the MME POOL 2 in abutting connection with eNB, and the MME POOL information set that DeNB connects is the subclass that connects MME POOL information set in abutting connection with eNB; This scene is consistent with scene one situation.

In the scene three as shown in Figure 9, DeNB is connected respectively on MME POOL 1 and the MME POOL 2, is connected on the MME POOL 2 in abutting connection with eNB, and the MME POOL information set that connects in abutting connection with eNB is the subclass of the MME POOL information set of DeNB connection; Under this scene, it is not optimum selection that RN selects the switching of S1 type or X2 type.This is because in the prior art; Only there is DeNB to have S1 to be connected with the mobility management apparatus pond; RN only has S1 to link to each other with DeNB, and DeNB is that the UE under the RN selects the MME POOL group in the core net, so RN can't know which MME POOL group its UE that connects has down specifically selected.For example in this example, select to be registered among the MME POOL 1 if DeNB is UE, owing to be not connected on this MME POOL 1 in abutting connection with eNB, RN switches optimum for UE selects the S1 type in this case; If select to be registered among the MMEPOOL 2 but DeNB is UE, owing to the common factor in abutting connection with eNB and DeNB is exactly MME POOL 2, it is optimum that therefore this situation selects X2 interface to switch.But because RN can't get access to the mobility management apparatus pond information in abutting connection with eNB; RN can't learn also which MME POOL UE specifically is registered among; Therefore RN can't get access under the situation of the mobility management apparatus pond information of eNB and the mobility management apparatus pond information comparative result of self; In order to guarantee the UE success rate for switching, often select the S1 type to switch.But this selection is not considered still and to be had possibility of can X2 switching, thereby brings unnecessary time delay and efficient reduction.In this case, RN should freely select the X2 type to switch or the switching of S1 type.Therefore in the prior art; Because RN can't get access in abutting connection with the comparative result of the mobility management apparatus pond information of eNB and the mobility management apparatus pond information of self; Make RN can't from various combine scenes, distinguish this scene that can freely select switching type, therefore RN has also just lost the chance of under such scene, selecting switching type flexibly.

In the scene four as shown in Figure 9; DeNB is connected respectively on MME POOL 1 and the MME POOL 2; Also be connected respectively on MME POOL 2 and the MME POOL 3 in abutting connection with eNB; The MME POOL information set that DeNB connects has common factor with the MME POOL information set that is connected in abutting connection with eNB, and occuring simultaneously is MMEPOOL 2; This scene is consistent with scene three situation.

In the scene five as shown in Figure 9, DeNB is connected on the MME POOL 1, be connected on the MME POOL 2 in abutting connection with eNB, the MME POOL information set that DeNB connects with is connected not common factor of MMEPOOL information set in abutting connection with eNB.Under this scene; The optimum selection of RN is that the S1 type is switched; But,, will bring this avoidable handoff failure if select X2 because RN can't get access in abutting connection with the comparative result of mobility management apparatus pond information and the mobility management apparatus pond information of self of eNB.

Being called in abutting connection with eNB (promptly for the switching of UE RN under this non-DeNB and this non-DeNB among the present invention in abutting connection with eNB is unified; ENB that is connected with DeNB through X2 interface and the RN under this eNB all are called in abutting connection with eNB), be used for RN be UE when doing switch decision with DeNB and identical DeNB under other RN distinguish.Among the present invention in abutting connection with eNB comprise RN under the eNB of the eNB of common adjacency, common adjacency, in abutting connection with DeNB, RN etc. under the DeNB.

As shown in Figure 9; DeNB has the mobility management apparatus pond information of the eNB of X2 interface to compare with the mobility management apparatus pond information of self with it; DeNB, RN and possibly make up 5 kinds of scenes in abutting connection with eNB; These scenes comparative type that further can be divided three classes can be called comparative type one respectively, comparative type two and comparative type three; Wherein, Comparative type one has comprised the scene of scene one and scene two representatives; Under this scene, the MME POOL information set that DeNB connects is in abutting connection with the MME POOL information set of the subclass of the MMEPOOL information set of eNB or DeNB connection and identical in abutting connection with the MMEPOOL information set of eNB, in this case; RN is under the situation that other switching judging conditions satisfy, and RN is that UE preferentially selects X2 interface to switch in abutting connection with eNB; Comparative type two has comprised scene three and scene four; The MME POOL information set that DeNB connects and common factor is arranged in abutting connection with the MME POOL information set of eNB that is to say, DeNB is except being connected at least one MME POOL that equally also connects in abutting connection with eNB; DeNB is also connected at least one in abutting connection with the unconnected MME POOL of eNB; Under such situation, RN is under the situation that other switching judging conditions satisfy, and RN can the X2 type switches in abutting connection with eNB for UE selects the S1 type to switch perhaps; Comparative type three has comprised scene five; The MMEPOOL information set that DeNB connects and do not occur simultaneously in abutting connection with the MME POOL information set of eNB; That is to say; Any all is different from the MME POOL that connects in abutting connection with eNB among the MME POOL that DeNB connects, and, under the situation that other switching judging conditions satisfy, can only switch for UE select the S1 type at RN under such.Other above-mentioned switching conditions comprise the link break-make situation etc. of the X2 interface of inspection DeNB of RN for example and switching target eNB.

DeNB will send to RN with the comparative type of the comparative result in abutting connection with eNB mobility management apparatus pond.

RN receives the comparative type that DeNB sends and preserves; RN is switching to for UE when eNB makes switching type and selects; Through judging DeNB and the target pond group comparative type in abutting connection with eNB, distinguish the different scenes that UE switches at other, the preferential X2 interface of selecting switches under the scene that is fit to the X2 switching; Under the scene that only is fit to the S1 switching, select the S1 type to switch, under the scene of selecting flexibly, freely select the switching type of UE.

Through accompanying drawing and specific embodiment the present invention is done further detailed description below.

Embodiment one

In this enforcement; As shown in Figure 9; DeNB, RN and be in the scene of scene one or scene two in abutting connection with eNB, the scene of type one regulation just, DeNB compares with the mobility management apparatus pond information of self with in abutting connection with the mobility management apparatus pond information of eNB; Comparative result is a comparative type one, and DeNB sends to RN with comparative type one; RN receives this comparative type one in abutting connection with eNB from DeNB, and RN under the situation that other switching judging conditions satisfy, through judging comparative type one, is that UE selects the switching of X2 type switching to for UE when eNB makes switching type and selects.

Figure 10 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention one, and shown in figure 10, the switching type system of selection specifically comprises following step in the wireless relay system of this example:

Step 101:DeNB compares with the mobility management apparatus pond information of self with in abutting connection with the mobility management apparatus pond information of eNB, and comparative result is sent to RN.

DeNB is obtaining after the mobility management apparatus pond information of eNB, and mobility management apparatus pond information of self and the mobility management apparatus pond group information of all of its neighbor eNB (GU group ID) are compared described difference; In this example, for example the mobility management apparatus pond group information encoding (GU group ID) that has of DeNB and just the same in abutting connection with eNB; Therefore DeNB judges that this situation is a comparative type one; DeNB sends to RN with comparative type one; DeNB can use the independent field transmission comparative type one of for example X2 interface message eNBconfiguration update flow process use to give RN.

Step 102:RN receives this comparative type one in abutting connection with eNB from DeNB, and RN under the situation that other switching judging conditions satisfy, selects the switching of X2 type through comparative type one for UE switching to for UE when eNB makes switching type and selects.

RN receives the comparative type in abutting connection with eNB from DeNB, and RN will preserve this comparative type in abutting connection with eNB, and in this example, this comparative type is a comparative type one.

When certain UE need switch in abutting connection with eNB from RN, all satisfy at other Rule of judgment under the situation of switching condition, RN is through judging that in abutting connection with the comparative type of eNB be comparative type one, RN will preferentially select the X2 interface switching type for this UE.

Embodiment two

In this enforcement; As shown in Figure 9; DeNB, RN and be in the scene of four types of scene three or scenes in abutting connection with eNB, the scene of type two defineds just, DeNB compares with the mobility management apparatus pond information of self with in abutting connection with the mobility management apparatus pond information of eNB; Comparative result is a comparative type two, and DeNB sends to RN with comparative type two; RN receives this comparative type two in abutting connection with eNB from DeNB, and RN under the situation that other switching judging conditions satisfy, through comparative type two, is that UE selects S1 to switch or the switching of X2 type switching to for UE when eNB makes switching type and selects.

Figure 11 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention two, and shown in figure 11, the switching type system of selection specifically comprises following step in the wireless relay system of this example:

Step 111:DeNB compares with the mobility management apparatus pond information of self with in abutting connection with the mobility management apparatus pond information of eNB, and comparative result is sent to RN.

DeNB is obtaining after the mobility management apparatus pond information of eNB, the difference of more said all group information encodings (GU group ID); In this example, the group information encoding (GUgroup ID) that for example can DeNB has and not just the same in abutting connection with eNB exists to overlap, so DeNB judges that these two kinds of situation are comparative type two; DeNB sends to RN with comparative type two; DeNB can use the independent field transmission comparative type two of for example X2 interface message eNB configuration update flow process use to give RN.

Step 112:RN receives this comparative type two in abutting connection with eNB from DeNB, and RN under the situation that other switching judging conditions satisfy, selects S1 type or the switching of X2 type through comparative type two for UE switching to for UE when eNB makes switching type and selects.

RN receives the comparative type in abutting connection with eNB from DeNB, and RN will preserve this comparative type in abutting connection with eNB, and in this example, this comparative type is a comparative type two; When certain UE need switch in abutting connection with eNB from RN, all satisfy at other Rule of judgment under the situation of switching condition, RN is through judging that in abutting connection with the comparative type of eNB be comparative type two, RN preferentially selects the X2 interface switching type for this UE; Because such as background technology description; Under the scene of this comparative type; RN is that UE selects X2 interface to switch the possibility that existence is failed because of mobility management apparatus pond (MME POOL) is different; If the X2 handoff failure of this UE, according to prior art, RN can be with select the S1 type to switch once more for UE.

Optional; Such as background technology description, under the scene of this comparative type, RN is that UE selects X2 interface to switch to have the possibility of fail because of mobility management apparatus pond (MME POOL) is different; Therefore when certain UE need switch in abutting connection with eNB for RN; All satisfy at other Rule of judgment under the situation of switching condition, RN is through judging that in abutting connection with the comparative type of eNB be comparative type two, and RN can preferentially select S1 interface switching type to guarantee higher handover success rate for this UE.

Embodiment three

In this enforcement; As shown in Figure 9; DeNB, RN and be in the class of scene five in abutting connection with eNB, just in the scene of type three regulations, DeNB compares with the mobility management apparatus pond information of self with in abutting connection with the mobility management apparatus pond information of eNB; Comparative result is a comparative type three, and DeNB sends to RN with comparative type three; RN receives this comparative type three in abutting connection with eNB from DeNB, and RN under the situation that other switching judging conditions satisfy, through judging comparative type three, is that UE selects the switching of S1 type switching to for UE when eNB makes switching type and selects.

Figure 12 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention three, and shown in figure 12, the switching type system of selection specifically comprises following step in the wireless relay system of this example:

Step 121:DeNB compares with the mobility management apparatus pond information of self with in abutting connection with the mobility management apparatus pond information of eNB, and comparative result is sent to RN.

According to prior art, DeNB and in abutting connection with between the eNB in setting up X2 linking relationship process, if DeNB and all have mobility management apparatus pond information in abutting connection with eNB, DeNB and exchange said pond group information in abutting connection with eNB and give the other side.

DeNB is obtaining after the mobility management apparatus pond information of eNB, the difference of more said all group information encodings (GU group ID); In this example, the group information encoding (GU GroupID) that has of DeNB is with different fully in abutting connection with eNB; Therefore DeNB judges that this situation is a comparative type three; DeNB sends to RN with comparative type three; DeNB can use the independent field transmission comparative type three of for example X2 interface message eNB configuration update flow process use to give RN.

Step 122:RN receives this comparative type three in abutting connection with eNB from DeNB, and RN under the situation that other switching judging conditions satisfy, selects the switching of S1 type through judging comparative type three for UE switching to for UE when eNB makes switching type and selects.

RN receives the comparative type in abutting connection with eNB from DeNB, and RN will preserve this comparative type in abutting connection with eNB, and in this example, this comparative type is a comparative type three.

Such as background technology description; Under the scene of this comparative type; If RN switches certain existence because of mobility management apparatus pond (MME POOL) difference causes failure for UE selects X2 interface, therefore when certain UE need switch in abutting connection with eNB from RN, all satisfy at other Rule of judgment under the situation of switching condition; RN is through judging that in abutting connection with the comparative type of eNB be comparative type three, and RN will select S1 interface switching type for this UE.

Embodiment four

In this enforcement, DeNB does not transmit in abutting connection with the eNB comparative type and gives RN; RN is switching to for UE when eNB makes switching type and selects, and under the situation that other switching judging conditions satisfy, finding should be in abutting connection with the comparative type of eNB, and RN will select S1 interface switching type for UE.

Figure 13 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention four, and shown in figure 13, the switching type system of selection specifically comprises following step in the wireless relay system of this example:

Step 131:DeNB does not transmit in abutting connection with the eNB comparative type and gives RN.

In this example, self mobility management apparatus pond information and DeNB are not exchanged in abutting connection with eNB, DeNB can't compare two mobility management apparatus pond information between the network element in this example.

The judgement that DeNB will not make comparisons does not send to any relevant this comparison information in abutting connection with eNB of RN simultaneously; Perhaps DeNB has judged DeNB and in abutting connection with the pond group comparative type of eNB, but does not also pass to RN.

Step 132:RN is switching to for UE when eNB makes switching type and selects; Finding should be in abutting connection with the comparative type of eNB; When certain UE need switch in abutting connection with eNB from RN; All satisfy at other Rule of judgment under the situation of switching condition, RN finds should be in abutting connection with the comparative type of eNB, and RN will preferentially select S1 interface switching type for this UE.In this example, mainly be to avoid selecting the X2 interface switching type.

Embodiment five

In the present embodiment, as shown in Figure 9, DeNB, RN and change has taken place in abutting connection with the eNB scene for example is updated to scene five from scene one, perhaps from scene just before dawn newly to scene three; DeNB will be after changing self mobility management apparatus pond information and compare in abutting connection with the mobility management apparatus pond information of eNB, DeNB sends to RN with comparative type; RN receives this comparative type in abutting connection with eNB from DeNB, and RN preserves new comparative type, and RN under the situation that other switching judging conditions satisfy, through judging comparative type, is a UE selection switching type switching to for UE when eNB makes switching type and selects.

Figure 14 is the flow chart of switching type system of selection in the wireless relay system of the embodiment of the invention five, and shown in figure 14, the switching type system of selection specifically comprises following step in the wireless relay system of this example:

Step 141:DeNB, RN and change has taken place in abutting connection with the eNB scene, DeNB sends to RN with the comparative type that changes.

DeNB, RN and change has taken place in abutting connection with the eNB scene; And scene change changed comparative type, DeNB will be after changing self mobility management apparatus pond information and compare in abutting connection with the mobility management apparatus pond information of eNB, DeNB sends to RN with comparative type.

DeNB for example; RN and five change to scene two in abutting connection with the eNB scene from scene that is to say, adds the connection of MME group 1 as shown in Figure 9 in abutting connection with eNB; According to prior art; To pass to DeNB through the group information encoding (GU Group ID) that X2 interface config update process (eNB configuration update) will change in abutting connection with eNB, after DeNB receives said information, compare with the mobility management apparatus pond information of self with in abutting connection with eNB mobility management apparatus pond information after changing; Be judged as comparative type two, DeNB sends to RN with comparative type two.

Again for example; DeNB, RN and three change to scene five in abutting connection with the eNB scene from scene that is to say that DeNB has deleted the connection of MME group 2 as shown in Figure 9; DeNB is except notifying in abutting connection with eNB through X2 interface config update process; The mobility management apparatus pond information and the mobility management apparatus pond information behind eNB that self change are compared, be judged as comparative type three, DeNB sends to RN with comparative type three.

DeNB, RN and change has taken place and do not had the variation of occurrence type in abutting connection with the eNB scene; DeNB can not send to RN to unchanged comparative type; DeNB for example; RN and one change to scene two in abutting connection with the eNB scene from scene, DeNB can not send the comparative type of not change and give RN, and RN is that UE makes switching type and selects according to original comparative type still.

Step 142:RN receives this comparative type in abutting connection with eNB from DeNB; RN preserves new comparative type, and RN is switching to for UE when eNB makes switching type and selects, under the satisfied situation of other switching judging conditions; Through judging comparative type, for UE selects switching type.

RN receives this comparative type in abutting connection with eNB from DeNB; RN preserves new comparative type, and RN is switching to for UE when eNB makes switching type and selects, under the satisfied situation of other switching judging conditions; Through judging the method for comparative type in the previous embodiment, for UE selects switching type.

Embodiment six

In the present embodiment, DeNB has connected a plurality of eNB and a plurality of RN respectively, and DeNB transmits comparative type information and gives RN.

DeNB through and RN between the X2 interface process transmit comparative type information; When for example RN and DeNB set up X2 interface, DeNB can set up in response (X2 setup response) or X2 interface foundation request (X2 setup request) message and will send to RN in abutting connection with the type comparison information of eNB at X2 interface; For example RN and DeNB have set up X2 interface, and DeNB can be through sending to RN in abutting connection with the type comparison information of eNB in X2 interface config update (eNBconfiguration update) or X2 interface config update response (eNB configuration updateacknowledge) message.

DeNB also can through and RN between the S1 interface procedure transmit comparative type information, for example DeNB can send to RN with the type comparison information through flow processs such as S1 setup.

The comparison information type is relevant in abutting connection with eNB with each; The different comparative type information in abutting connection with eNB are different; Therefore DeNB is to transmit in abutting connection with eNB according to every with the mode that the type comparison information sends to RN; That is to say that during than type information, which the comparative type information in abutting connection with eNB needs indicate to RN simultaneously specifically is to DeNB in transfer ratio.

DeNB will be in abutting connection with the eNB of eNB numbering (eNB ID) and this in abutting connection with eNB the comparative type information of same time send to RN; When for example DeNB uses X2 interface config update (eNB configuration update) transmission information; DeNB can increase a new field in said message, this field comprises eNB numbering (eNB ID) and this comparative type information in abutting connection with eNB in abutting connection with eNB.

DeNB also can pass to RN with comparative type information through the mode of implicit expression; When for example DeNB uses X2 interface config update (eNB configuration update) transmission information; In said message, only comprise information and an independent comparative type information in abutting connection with eNB; RN through judging that this message only comprises in abutting connection with the information of eNB and independent comparative type information, judges that this comparative type information belongs to said in abutting connection with eNB when obtaining information.

DeNB with comparative type and ownership all send to RN in abutting connection with eNB after, RN receives and preserves its corresponding comparative type information according to every eNB.RN according to switching target sign (Target eNB ID), finds the corresponding comparative type information of said this eNB when selecting switching type for UE.This information offers RN and makes a decision use.

DeNB can also can only issue part RN with part in abutting connection with the type comparison information of eNB with all issuing the whole RN that belong under this DeNB in abutting connection with the type comparison information of eNB.

DeNB will all issue the whole RN that belong under this DeNB in abutting connection with the type comparison information of eNB; If new for eNB, DeNB will be somebody's turn to do and newly issue whole RN in abutting connection with the type comparison information of eNB.

DeNB also can only will send to the RN of actual adjacency in abutting connection with the type comparison information of eNB according to RN with in abutting connection with the actual syntople of eNB.

The present invention has put down in writing switching type selective system in a kind of wireless relay system simultaneously, comprising: DeNB, with said in abutting connection with eNB, the RN that is connected with said DeNB and the UE that is connected with said RN; Wherein, above-mentioned each network element is existing network element, and the network configuration of being formed is also identical with existing network infrastructure, and just, the function that following each network element is realized is identical with the function that existing network element is realized, below introduces it in detail.

Above-mentioned comparative result comprises:

For above-mentioned comparative type one, comparative type two, comparative type three are provided with sign respectively, said DeNB further notifies the RN that connects down to said DeNB with said sign.

Above-mentioned switching type comprises that switching, pass through X2 interface through the S1 interface switches.

Above-mentioned RN is that said UE selects switching type to be specially according to comparative result:

When above-mentioned RN can not obtain comparative result, for said UE selects to switch through the S1 interface.

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.

Claims

1. switching type system of selection in the wireless relay system is characterized in that said method comprises:

Host base station DeNB compares with the mobility management apparatus pond MME POOL information of self with MME POOL information in abutting connection with eNB, and the via node RN that notifies said DeNB to connect down comparative result;

When the user equipment (UE) under the said RN was desired to switch to said network under eNB, said RN was that said UE selects switching type according to comparative result.

2. method according to claim 1 is characterized in that, said comparative result comprises:

3. method according to claim 2 is characterized in that, the said RN that notifies said DeNB to connect down comparative result is specially:

4. method according to claim 3 is characterized in that, said DeNB is that with said DeNB and each and said comparative type in abutting connection with eNB, and said eNB sign notice is given said DeNB the RN of connection down with the mode that comparative type sign sends to RN.

5. according to each described method of claim 1 to 4, it is characterized in that said switching type comprises that switching, pass through X2 interface through the S1 interface switches.

6. method according to claim 5 is characterized in that, said RN is that said UE selects switching type to be specially according to comparative result:

7. method according to claim 5 is characterized in that, said method also comprises:

8. switching type selective system in the wireless relay system is characterized in that said system comprises: DeNB, with said in abutting connection with eNB, the RN that is connected with said DeNB and the UE that is connected with said RN; Wherein,

9. system according to claim 8 is characterized in that, said comparative result comprises:

10. system according to claim 9 is characterized in that, for above-mentioned comparative type one, comparative type two, comparative type three are provided with sign respectively, said DeNB further notifies the RN that connects down to said DeNB with said sign.

11. to 10 each described systems, it is characterized in that according to Claim 8 said switching type comprises that switching, pass through X2 interface through the S1 interface switches.

12. system according to claim 11 is characterized in that, said RN is that said UE selects switching type to be specially according to comparative result:

13. system according to claim 11 is characterized in that, when said RN can not obtain comparative result, for said UE selects to switch through the S1 interface.