CN1507190A - Method for solving UE movement in non-tracking area idle mode - Google Patents

Abstract

A method for solving UE movement in non-tracking area idle mode, comprising steps: after the UE in non-tracking area idle mode moves from a cell to a new cell, send an "RRC connection request message" to the new cell; RNC receives After receiving the "RRC connection request message" from the UE, send the "MBMS registration" message to the SGSN to determine whether the UE has joined the corresponding MBMS service; the SGSN sends the "MBMS registration response" message to the RNC to tell the RNC UE whether it can receive the MBMS service ; If the UE moves to another cell controlled by the RNC, and this UE is the first UE to apply for the MBMS service of the new RNC, establish an Iu signaling connection and a radio access bearer; if the UE has not passed authentication or the new cell is not In the tracking area, the RNC sends the "RRC Connection Reject" message to the UE. If the UE has passed the authentication and is in the tracking area, the RNC sends the "RRC Connection Establishment" message to the UE; When switching from PTP to PTM, RNC sends "MBMS Channel Reconfiguration" to all UEs in the cell.

Description

Method for solving UE movement in non-tracking area idle mode

technical field

The present invention relates to a wideband code division multiple access (hereinafter referred to as WCDMA) mobile communication system, in particular to a method for solving UE movement in a non-tracking area IDLE mode.

Background technique

Multimedia Broadcast and Multicast Service (hereinafter referred to as MBMS) is a new service being standardized by the Third Generation Partnership Project (hereinafter referred to as 3GPP). The MBMS service is a one-way point-to-multipoint service. The biggest feature of this service is that it can effectively utilize wireless resources and network resources.

Figure 1 describes the system structure of MBMS. The MBMS network structure is based on the general packet radio service (referred to as GPRS) core network, and a new network unit is added. The following is a description of the MBMS system structure in FIG. 1 .

101 The broadcast and multicast service center (BM-SC for short) is the service control center of the MBMS system. 102 Gateway GPRS Support Node (GGSN for short) and 103 Serving GPRS Support Node (SGSN for short) constitute a transmission network for MBMS services and provide routes for data transmission. 104 The UMTS Terrestrial Radio Access Network (abbreviated as UTRAN) provides radio resources for MBMS services on the air interface. 105 User equipment (UE for short) is a terminal device for receiving data. 106 The Home Location Register (HLR for short) saves data related to the user and can provide services such as user authentication. 107Uu is a wireless interface, and 108Iu is an interface between an access network and a core network. In the figure, other parts except the UE constitute an infrastructure domain (abbreviated as IF). The radio resources used by MBMS services are not dedicated to users, but shared by all users of this service.

When the MBMS service is not introduced in the WCDMA system, the UE in IDLE mode only receives broadcast and paging services. If you want to receive other services, you must enter the connection mode. After a UE in IDLE mode performs cell reselection and moves from one cell to another, it is still in IDLE mode. Until the UE has uplink data to send or receives a paging message from the network indicating that there is downlink data for the UE, the UE sends a "radio resource control (hereinafter referred to as RRC) connection request" message to the radio network controller (hereinafter referred to as RNC). The service request process initiated by the network is shown in Figure 2.

201 The SGSN receives the downlink PDU for the UE in IDLE mode.

202 The SGSN sends a paging message to the RNC, and the RNC pages the mobile station (hereinafter referred to as MS) by sending the paging message.

203 MS sends "RRC Connection Request" message to RNC. If the MS is in IDLE mode and there is uplink data to be sent (that is, the service request process initiated by the UE), start from this step.

204 RNC allocates resources and sends "RRC connection establishment" message to MS.

205 The MS sends a "service request" message to the SGSN, requesting the SGSN to reserve resources.

206 SGSN authenticates the UE in IDLE mode.

207 When the service request is accepted, the SGSN returns a "service acceptance" message to the MS.

208 SGSN sends a "Radio Access Bearer (hereinafter referred to as RAB) Allocation Request" message to the RNC to request RAB establishment. The RNC sends a "radio bearer (hereinafter referred to as RB) establishment" message to the MS to inform the MS of newly establishing a RAB identity and requesting establishment of radio resources.

209 The MS and the RNC return "RB establishment complete" and "RAB assignment response" respectively, indicating that the establishment of the user plane bearer is completed.

210 For each RAB rebuilt with the modified Qos, the SGSN initiates the "packet data protocol (hereinafter referred to as PDP) context modification" process to notify the MS and GGSN of the newly negotiated Qos corresponding to the PDP context.

211 SGSN sends downlink data packet.

From the above analysis, it can be seen that the UE in IDLE mode does not receive other services except broadcast and paging messages, and the UE in this mode will not cause data loss when moving from one cell to another. In addition, existing services do not have the problem of tracking areas and non-tracking areas. For a UE receiving MBMS services in IDLE mode in a non-tracking area, after moving to a new cell, it does not know whether the new cell is in a tracking area or a non-tracking area, and whether the channel mode is point-to-point or point-to-multipoint. The paging message will inevitably cause data loss. Therefore, the existing norms cannot solve the mobile problem of users receiving MBMS services in the mobile communication system.

Contents of the invention

The purpose of the present invention is to provide a method for a UE receiving MBMS services in a non-tracking area and in IDLE mode to move from one cell to another.

In order to achieve the above purpose, a method for solving UE movement in non-tracking area idle mode, comprising steps:

(a) After the UE in the non-tracking area idle mode moves from a cell to a new cell, it sends an "RRC connection request message" to the new cell;

(b) After receiving the "RRC connection request message" from the UE, the RNC sends a "MBMS registration" message to the SGSN to determine whether the UE has joined the corresponding MBMS service;

(c) The SGSN sends a "MBMS Registration Response" message to the RNC to tell the RNC whether the UE can receive the MBMS service;

(d) If the UE moves to another cell controlled by the RNC, and this UE is the first UE applying for the MBMS service of the new RNC, establish an Iu signaling connection and a radio access bearer;

(e) If the UE has not passed the authentication or the new cell is a non-tracking area, the RNC sends a "RRC Connection Refused" message to the UE,

If the UE has passed the authentication and is in the tracking area, the RNC sends a "RRC connection establishment" message to the UE;

(f) If the channel type in the new cell changes from PTP to PTM due to the UE joining, the RNC sends "MBMS channel reconfiguration" to all UEs in the cell.

The invention solves the mobile problem when UE using MBMS service is in non-tracking area and IDLE mode in the existing mobile communication system. Through the signaling flow provided by the present invention, the data loss of UE moving between cells is reduced. Inform the UE in time whether the new cell is a tracking area or a non-tracking area. Perform authentication on the UE (check whether the UE has joined the MBMS service), and prevent illegal users from accessing the MBMS service. The signaling transmission on the air interface is reduced, wireless resources are saved, and the efficiency of the system for providing MBMS services is improved.

Description of drawings

Fig. 1 is the logic network equipment figure of MBMS business;

Fig. 2 is a process diagram of a service request initiated by the network;

Fig. 3 is a signaling flow chart for solving the problem of mobile UE receiving MBMS service in non-tracking area idle mode.

Detailed ways

The present invention provides a method for solving UE movement in non-tracking area idle mode and receiving MBMS service, and the method includes the following steps:

a) After the UE in the non-tracking area idle mode and receiving the MBMS service moves from one cell to another, it sends an "RRC connection request" message to the new cell. The message includes: MBMS Service ID, Initial UE Identity.

b) After receiving the "RRC connection request message" from the UE that needs to receive the MBMS service, the RNC sends the "MBMS registration" message to the SGSN, and authenticates the UE through the SGSN to determine whether the UE has joined the corresponding MBMS service. The "MBMS Registration" message includes: MBMS Service ID, Initial UE Identity. If the UE moves to another cell controlled by the RNC, and this UE is the first UE applying for the MBMS service of the new RNC, this message can be used to apply for the service to the SGSN.

c) The SGSN sends a "MBMS Registration Response" message to the RNC to tell the RNC whether the UE can receive the MBMS service. This message includes: MBMS Service ID, Initial UEIdentity, Pass Indication (whether the authentication is passed).

d) If the UE moves to another cell controlled by the RNC, and this UE is the first UE applying for the MBMS service of the new RNC, an Iu signaling connection and RAB are established. The SGSN replicates the data to the new RNC.

e) If the UE has not passed the authentication or the new cell is a non-tracking area, the RNC sends a "RRC Connection Reject" message to the UE. In the "reason for rejection", two options "non-tracking area" and "authentication failed" need to be added, which are used to tell the UE the reasons for the above two rejections respectively. The "RRC Connection Reject" message should also contain "RB information" (optional information element), so that the UE in the non-tracking area can quickly obtain the RB information, so as to listen to MBMS data on the corresponding channel.

f) If the UE has passed the authentication and is in the tracking area, the RNC sends an "RRC connection establishment" message to the UE. This message includes "RB information" (optional information element). In this way, if there is no channel type conversion due to the joining of the UE, the UE can quickly obtain RB information, reducing data loss.

g) After receiving the "RRC connection establishment" message from the UE, it sends the "RRC connection establishment complete" message to the RNC.

h) If the channel type is converted from PTP (point-to-point) to PTM (point-to-multipoint) due to the joining of the UE, the RNC sends "MBMS channel reconfiguration" to all UEs in the cell.

i) UE can receive MBMS data from the new cell.

Figure 3 shows the signaling process for a UE in non-tracking area idle mode and receiving MBMS services to move to another cell.

301 After the UE receiving MBMS data in the non-tracking area idle mode moves from one cell to another, it sends an "RRC connection request" message to the new cell.

302 After receiving the "RRC connection request message" from the UE that needs to receive the MBMS service, the RNC sends the "MBMS registration" message to the SGSN, and authenticates the UE through the SGSN to determine whether the UE has joined the corresponding MBMS service. The "MBMS Registration" message includes: MBMSService ID, Initial UE Identity. If UE moves to another cell controlled by RNC, and this UE is the first UE applying for MBMS service of the new RNC, this message can be used to apply for service to SGSN, so that SGSN sends MBMS data to RNC.

303 The SGSN sends an "MBMS Registration Response" message to the RNC to tell the RNC whether the UE can receive the MBMS service. This message includes: MBMS Service ID, Initial UE Identity, Pass Indication (whether the authentication is passed).

304 If the UE moves to another cell controlled by the RNC, and this UE is the first UE applying for the MBMS service of the new RNC, establish an Iu signaling connection and RAB. SGSN needs to copy data to new RNC.

305 If the UE has not passed the authentication or the new cell is in a non-tracking area, the RNC sends a "RRC Connection Refused" message to the UE. The "rejection reason" is set to "non-tracking area" and "authentication failed" respectively to tell the UE. The "RRC Connection Reject" message should also contain "RB information" (optional information element), so that the UE in the non-tracking area can quickly obtain the RB information, so as to listen to MBMS data on the corresponding channel.

If the UE has passed the authentication and is in the tracking area, the RNC sends an "RRC connection establishment" message to the UE. This message includes "RB information" (optional information element). In this way, if there is no channel type conversion due to the joining of the UE, the UE can quickly obtain RB information, reducing data loss.

After receiving the "RRC connection establishment" message, the UE reserves resources and sends a "RRC connection establishment complete" message to the RNC.

306 If the channel type changes from PTP to PTM due to the joining of the UE, the RNC sends "MBMS channel reconfiguration" to all UEs in the cell.

307 UE receives MBMS data from the new cell.

Claims (8)

1. a solution is in the method that non-tracking area idle mode shift UE moves, and comprises step:

(a) after the UE that is in non-tracking area idle mode shift moves to a new sub-district from a sub-district, send " RRC connection request message " to new sub-district;

(b) RNC receives behind UE next " RRC connection request message ", sends " MBMS registration " message to SGSN, determines whether this UE has added corresponding M BMS business;

(c) SGSN sends " MBMS registers response " message to RNC and tells whether RNC UE can receive the MBMS business;

(d) if UE moves to the sub-district of another one RNC control, this UE is again the UE of first application MBMS business of new RNC, sets up the Iu signaling and connects and RAB;

(e) if UE is not non-tracing area by authentication or new sub-district, RNC sends " RRC connects refusal " message and gives UE,

If UE has passed through authentication and has been in tracing area, RNC sends " RRC connects foundation " message and gives UE;

(f) if when causing owing to the adding of this UE that channel type is changed in the new sub-district from PTP to PTM, RNC sends " the MBMS channel is reshuffled " and gives all UE in this sub-district.

2. method according to claim 1 is characterized in that, " RRC connection request " message comprises: MBMS Service ID.

3. method according to claim 1 is characterized in that, " MBMS registration " message comprises: MBMS Service ID, Initial UE Identity.

4. method according to claim 3, it is characterized in that, if UE moves to the sub-district of another one RNC control, this UE is again the UE of first application MBMS business of new RNC, " MBMS registration " message can be used for to SGSN application MBMS business, thereby makes SGSN send the MBMS data to initiate RNC.

5. method according to claim 1 is characterized in that, " MBMS registers response " message comprises: MBMS Service ID, Initial UE Identity, Pass Indication.

6. method according to claim 1 is characterized in that, increases " non-tracing area " and " not passing through authentication " two reasons in " Reason For Denial " of " RRC connects refusal " message.

7. method according to claim 1 is characterized in that, also should comprise " RB information " in " RRC connects refusal " message, and the UE of non-like this tracing area can very fast acquisition RB information, thereby is answering the MBMS data on corresponding channel.

8. according to claim 1, it is characterized in that comprise " RB information " in " RRC connects foundation " message, if when not having to cause the conversion of channel type because of the adding of this UE like this, UE can very fast acquisitions RB information, the losing of minimizing data.

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