CN101483912A - Method for relay station initial registration - Google Patents

Abstract

The invention puts forward that when 3GPP (3rd Generation Partnership Project) is in a process evaluating from LTE (Long Term Evolution) to LTE-Advanced (an LTE advanced version), a fixed RS (Relay Station) is introduced into a mobile communication network so as to increase coverage area and improve system capacity. After introducing the fixed RS into a traditional cellular network, the RS needs to establish an interface with eNB (evolve NodeB, a name for the base station in the LET) and register and then can work normally. By referring to the initial register proposal of the eNB and UE (User Equipment) in the traditional cellular network and based on the RS and the eNB and the difference between the RS and the UE, the invention puts forward a method for initially registering the relay station, which comprises that: the RS determines and reads the information of attributive eNB; the RS sends an access request message to the attributive eNB and starts a timer; the attributive eNB allows the RS to be accessed and establishes an interface X2' with the RS; and the attributive eNB configures a system operation parameter for the RS.

Description

A kind of method of relay station initial registration

Technical field

The present invention relates to moving communicating field, relate in particular to a kind of method of relay station initial registration.

Background technology

Relaying technique can increase coverage and improve power system capacity as a kind of emerging technology, is regarded as the key technology of B3G/4G.3GPP (3rd Generation Partnership Project, third generation partner program) by LTE (Long Term Evolution) in the process of LTE-Advanced (the evolution version of LTE) evolution, proposition is introduced fixedly in mobile communications network, and RS (Relay Station, i.e. relay station) increases coverage and the capacity that improves system.This has opened up wide prospect for the application of relaying technique, also wireless communication technology has been proposed new challenge simultaneously.Be accompanied by the introducing of RS, need increase extra interface and support communication between RS and eNB (evolve NodeB, in LTE to the address of base station), the UE (User Equipment, subscriber equipment).In the LTE system, between eNB and the eNB, there has been interface between eNB and the UE.Wherein the interface name between eNB and the eNB is an X2 interface, and the interface name between eNB and the UE is LTE-Uu (still replacing with the Uu interface at a this) interface.In order to realize the smooth evolution of LTE to LTE-Advanced, interface relevant with UE in LTE-Advanced can not change, so the interface between RS and the UE uses the LTE-Uu interface that is similar between eNB and the UE.And the interface between eNB and the RS both had been different from original X2 interface, was different from the LTE-Uu interface again, and new interface of needs introducing is supported the communication between eNB and the RS, and the title of this interface is determined as yet among the 3GPP.Among the present invention with the interface called after X2 ' interface between eNB and the RS.Fig. 1 is the node interface schematic diagram in the junction network in the existing scheme.

In the legacy cellular net, introduce fixedly after the RS ability operate as normal after RS need set up interface and registers with eNB.

The registration of eNB may further comprise the steps in the existing scheme:

In the LTE system, the registration of eNB need be finished by means of UE, and depends on the Global-CID (be used for node in unique identification network) of the periodic broadcasting of eNB oneself.

The register flow path of eNB comprises following several steps:

1, eNB at first indicates its subordinate's the UE that is in idle condition to measure neighbor cell, and the Phy-CID (physical layer sign) of the neighbor cell eNB that arrives of reporting measurement, if do not have the eNB identical in the adjacent sub-district eNB chained list of eNB, then carry out following operation in succession with this Phy-CID.

2, eNB uses newfound Phy-CID as coefficient, and indication UE reads the Global-CID of new discovery sub-district.

3, UE reports eNB with it after having obtained Global-CID.

4, eNB utilizes Phy-CID and the Global-CID that obtains, send X2 SETUP REQUEST message to newfound eNB, newfound eNB returns X2 SETUPRESPONSE message after receiving this message, exchange application layer parameter is each other set up X2 interface between two nodes.

Fig. 2 is that the register command flow process of eNB in the existing scheme is mutual.

The registration of UE may further comprise the steps in the existing scheme:

1, at first be to select suitable PLMN (Public Land MobileNetwork, public land mobile network) after the UE start.

2, carry out Cell searching, selection can be eNB that service oneself the is provided attributive eNB as oneself.

3, read message in the broadcast channel, the Global-CID that reads and the Global-CID of own attributive eNB are compared, if identical then be the attributive eNB of oneself.

4, after reading attributive eNB and obtaining relevant information, UE sends the access request message to attributive eNB.

5, eNB sends LTE-Uu SETUPREQUEST message to UE after receiving the access request message, and the LTE-Uu interface is set up in request.UE then sends LTE-Uu SETUP RESPONSE message to attributive eNB and agrees to set up the LTE-Uu interface, the parameter of interactive interface operation between two nodes after receiving this message.

Fig. 3 is that the register command flow process of UE in the existing scheme is mutual.

RS residing status in network is different with eNB and UE in the legacy cellular net.At first, it will belong to certain eNB down, and accepts the management of eNB.Secondly, it has subordinate's UE again, and will provide service for its subordinate's UE.In a sense, it has a part of attribute of eNB, and a part of attribute of UE is also arranged.Because this particularity of RS in network, thus the registration of eNB and UE all can not be applied directly in the registration of RS, so need to consider that RS is in registration and the difference of eNB and UE.Existing technology is discussed more to the registration of eNB and UE, but pays close attention to less to the registration problem of RS.

Summary of the invention

The embodiment of the invention is with reference to the initial registration scheme of eNB and UE in the legacy cellular net, and different based on relay station and eNB and RS and UE have proposed a kind of method of relay station initial registration.

In the embodiment of the invention, RS at first determines and reads information of attributive eNB, sends to attributive eNB then and insert request message and start timer, attributive eNB allows RS to insert, and sets up X2 ' interface with RS, and is last, attributive eNB is a RS configuration-system coefficient of performance, and RS finishes initial registration.

When the attributive eNB of RS be appointment the time, attributive eNB is after the RS configuration-system coefficient of performance, RS disposes optional eNB tabulation;

When the attributive eNB of RS be not appointment the time, RS reads before the broadcast channel information, 1. RS carries out network selecting, selects suitable PLMN, 2. RS carries out cell selecting, by Cell searching select an energy for eNB that service is provided oneself as attributive eNB.

RS reads broadcast channel information, and the information that reads is decoded, and the Global-CID of certain eNB that decoding is obtained and the Global-CID of attributive eNB compare, and then this eNB is an attributive eNB when the two is identical, and RS reads information of attributive eNB.

Attributive eNB inserts request to RS to be judged, when the channel condition of link between eNB and the RS was too poor, attributive eNB sent refusal to RS and inserts message, and RS carries out cell selecting again, and search can be for oneself providing the attributive eNB of service again; Otherwise attributive eNB sends X2 ' SETUPREQUEST message to RS.

When RS sends the access request message to attributive eNB, start timer, when timer expiry RS did not receive that also X2 ' SETUP REQUEST message that attributive eNB sends to RS or refusal insert message, RS sent the access request message once more, till the access of success.

Attributive eNB and RS set up X2 ' interface and comprise following steps:

Attributive eNB is given the RS configuration of IP address;

Attributive eNB is utilized IP address initialization attributive eNB and (the StreamControl Transmission Protocol of the SCTP between the RS of RS, SCTP) connects, till successfully setting up the SCTP connection, this process comprises that 1. attributive eNB is carried out authentication to RS, 2. attributive eNB and RS set up RRC (Radio Resource Control, Radio Resource control) connection;

Attributive eNB and RS are by the parameter of X2 ' SETUP REQUEST and this two signaling message exchange supporting interfaces operation of X2 ' SETUP RESPONSE, 1. attributive eNB provides relevant information to RS, comprise: Node ID (node label number), TA (the Tracking Area that supports, tracking area) information such as tabulation, 2. RS provides relevant information to attributive eNB, comprising: Node ID, PLMN ID (mobile network identification number), RS system operation coefficient configuring request information etc.

Attributive eNB is that the system operation coefficient that RS disposes comprises: the parameter that the chained list configuration of neighbour station, parameter, RS covering relevant parameter, RS capacity that the RS function is relevant are correlated with.

As seen, the registration of eNB and UE has a lot of similarities in the registration of RS and the existing scheme, but its special difference is also arranged.

Description of drawings

Fig. 1 is the node interface schematic diagram in the junction network in the existing scheme;

Fig. 2 is that the register command flow process of eNB in the existing scheme is mutual;

Fig. 3 is that the register command flow process of UE in the existing scheme is mutual;

Fig. 4 is the method for relay station initial registration in the embodiment of the invention;

Fig. 5 is the method that RS determines attributive eNB in the embodiment of the invention;

Fig. 6 is the method for work of timer in the embodiment of the invention;

Fig. 7 is the method that attributive eNB and RS set up X2 ' interface in the embodiment of the invention.

Embodiment

The embodiment of the invention provides a kind of method of relay station initial registration.

As shown in Figure 4, the relay station initial registration mainly comprises the steps:

Step S401, RS read broadcast channel information, the information that reads is decoded, the Global-CID of certain eNB that decoding is obtained and the Global-CID of attributive eNB compare, and then this eNB is an attributive eNB when the two is identical, and RS reads information of attributive eNB.

Step S402, RS send to attributive eNB and insert request message and start timer.

Step S403, attributive eNB allow RS to insert, and set up X2 ' interface with RS.

Step S404, attributive eNB are RS configuration-system coefficient of performance, and these coefficients comprise: the parameter that the chained list configuration of neighbour station, parameter, RS covering relevant parameter, RS capacity that the RS function is relevant are correlated with.

As shown in Figure 5, relay station determines that attributive eNB comprises the steps:

Step S501, RS judge whether specified home eNB, if, execution in step S502 then, if not, execution in step S503 then.

Step S502, RS the eNB of appointment as attributive eNB.

Step S503, RS carry out network selecting, select suitable PLMN.

Step S504, RS carry out cell selecting, by Cell searching select an energy for eNB that service is provided oneself as attributive eNB.

As shown in Figure 6, timer work comprises the steps:

When step S601, RS send the access request message to attributive eNB, start timer.

Step S602, timer expiry judge whether RS receives that attributive eNB inserts message to X2 ' SETUP REQUEST message or the refusal that RS sends, if, execution in step S603 then, if not, execution in step S601 then.

Step S603, stop timer.

As shown in Figure 7, attributive eNB and RS set up X2 ' interface and comprise the steps:

Step S701, attributive eNB are given the RS configuration of IP address.

Step S702, attributive eNB utilize the IP address initialization attributive eNB of RS to be connected with SCTP between the RS, and till successfully setting up SCTP and connecting, this process comprises that 1. attributive eNB is carried out authentication to RS, and 2. attributive eNB is set up RRC with RS and is connected.

Step S703, attributive eNB and RS are by the parameter of X2 ' SETUP REQUEST and this two signaling message exchange supporting interfaces operation of X2 ' SETUPRESPONSE, 1. attributive eNB provides relevant information to RS, comprise: information such as the TA tabulation of Node ID, support, 2. RS provides relevant information to attributive eNB, comprising: Node ID, PLMN ID, RS system operation coefficient configuring request information etc.

Innovative point explanation of the present invention:

1, owing to the particularity of RS in network, it had both had a part of attribute of eNB, had a part of attribute of UE again.Therefore the interface between RS and the eNB has the functional attributes of LTE-Uu and X2 interface concurrently.In the channel feedback information of this interfaces need transmission trunking link, and the scheduling result of eNB.Under the distributed scheduling pattern, also need to transmit with second and jump the relevant signaling message of link circuit resource distribution.

2, when the initial registration of RS, in order to guarantee RS energy operate as normal, after RS and eNB have set up X2 ' interface, need be configured the system operation coefficient of RS by eNB, a kind of feasible solution is proposed in this patent scheme, adding system operation coefficient configuring request information element in SETUP RESPONSE message, dispose RS system operation coefficient in the newly-increased special signaling of eNB end and realize this layoutprocedure, is not need this signaling process in the process of eNB and UE registration.

3, considered two kinds of scenes among the present invention, a kind of is to choose the eNB of ownership by RS by network selecting and cell selecting, and another kind is to be RS specified home eNB.The eNB of specified home can save network selecting and cell selecting process, can simplify the process of RS initial registration, but might be rejected access owing to the link between eNB and the RS is relatively poor, and needs the tabulation of configuration attributive eNB at last.

The embodiment of the invention is with reference to the initial registration scheme of eNB and UE in the legacy cellular net, and different based on RS and eNB and RS and UE have proposed the method for the initial registration of a kind of RS.

It should be noted last that: above embodiment is the unrestricted technological thought of the present invention in order to explanation only, does not break away from any modification or partial replacement of spirit of the present invention and method scope, and it all is encompassed in the middle of the claim scope of the present invention.

Claims (7)

1, a kind of method of relay station initial registration is characterized in that, comprising:

RS (Relay Station, relay station) determines and reads the information of attributive eNB (evolve NodeB, in LTE to the address of base station);

RS sends to attributive eNB and inserts request message and start timer;

Attributive eNB allows RS to insert, and sets up X2 ＇ interface with RS;

Attributive eNB is a RS configuration-system coefficient of performance.

2, the method for claim 1 is characterized in that, also comprises:

When the attributive eNB of RS be appointment the time, attributive eNB is after the RS configuration-system coefficient of performance, RS disposes optional eNB tabulation;

When the attributive eNB of RS be not appointment the time, RS reads before the broadcast channel information, 1. RS carries out network selecting, select suitable PLMN (Public Land Mobile Network, public land mobile network), 2. RS carries out cell selecting, by Cell searching select an energy for eNB that service is provided oneself as attributive eNB.

3, the method for claim 1 is characterized in that, also comprises:

RS reads broadcast channel information, the information that reads is decoded, the Global-CID of certain eNB that decoding is obtained (be used for node in unique identification network) and the Global-CID of attributive eNB compare, and then this eNB is an attributive eNB when the two is identical, and RS reads information of attributive eNB.

4, the method for claim 1 is characterized in that, also comprises:

Attributive eNB inserts request to RS to be judged, when the channel condition of link between eNB and the RS was too poor, attributive eNB sent refusal to RS and inserts message, and RS carries out cell selecting again, and search can be for oneself providing the attributive eNB of service again; Otherwise attributive eNB sends X2 ＇ SETUPREQUEST message to RS.

5, as claim 1 or 4 described methods, it is characterized in that, also comprise:

When RS sends the access request message to attributive eNB, start timer, when timer expiry RS did not receive that also X2 ＇ SETUP REQUEST message that attributive eNB sends to RS or refusal insert message, RS sent the access request message once more, till the access of success.

6, the method for claim 1 is characterized in that, also comprises:

Attributive eNB and RS set up X2 ＇ interface and comprise following steps:

Attributive eNB is given the RS configuration of IP address;

Attributive eNB is utilized IP address initialization attributive eNB and (the StreamControl Transmission Protocol of the SCTP between the RS of RS, SCTP) connects, till successfully setting up the SCTP connection, this process comprises that 1. attributive eNB is carried out authentication to RS, 2. attributive eNB and RS set up RRC (Radio Resource Control, Radio Resource control) connection;

Attributive eNB and RS are by the parameter of X2 ＇ SETUP REQUEST and this two signaling message exchange supporting interfaces operation of X2 ＇ SETUP RESPONSE, 1. attributive eNB provides relevant information to RS, comprise: Node ID (node label number), TA (the Tracking Area that supports, tracking area) information such as tabulation, 2. RS provides relevant information to attributive eNB, comprising: Node ID, PLMN ID (operator logo number), RS system operation coefficient configuring request information etc.;

7, the method for claim 1 is characterized in that, also comprises:

Attributive eNB is that the system operation coefficient that RS disposes comprises: the parameter that the chained list configuration of neighbour station, parameter, RS covering relevant parameter, RS capacity that the RS function is relevant are correlated with.

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