CN1756415A - Method for managing user equipment for multimedia broadcast and multicast services - Google Patents

Abstract

Disclosed is a method for managing user equipment for multimedia broadcast and multicast services at the interface between a serving radio network controller and a drifting radio network controller, so as to solve the problem that the drifting radio network controller cannot correctly maintain multimedia broadcasting and multicasting services in the prior art. broadcast context issues. The method includes the steps: the serving radio network controller notifies the drifting radio network controller whether to update the multimedia broadcast and multicast context and Release the user equipment context of the multimedia broadcast and multicast service. Using the method of the invention, the drift wireless network controller can correctly manage and maintain the multimedia broadcast and multicast context and the multimedia broadcast and multicast user equipment context.

Description

Method for managing user equipment for multimedia broadcast and multicast services

technical field

The present invention relates to a method for managing user equipment, in particular to a wideband code division multiple access (hereinafter referred to as WCDMA) mobile communication system between an Iur interface (serving radio network controller (hereinafter referred to as SRNC) and drift radio network controller ( A method for managing multimedia broadcast and multicast service (hereinafter referred to as MBMS) user equipment (hereinafter referred to as UE).

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.

FIG. 1A describes the system structure of MBMS. The network structure of MBMS is based on the core network of General Packet Radio Service (GPRS for short), and a new network unit is added. The following is a description of the MBMS system structure in FIG. 1A.

101 represents a broadcast and multicast service center (abbreviated as BM-SC), which is the service control center of the MBMS system. 102 represents a gateway GPRS support node (abbreviated as GGSN), and 103 represents a serving GPRS support node (abbreviated as SGSN). The above-mentioned GGSN 102 and SGSN 103 constitute a transmission network for MBMS services and provide routes for data transmission. 104 represents the UMTS Terrestrial Radio Access Network (abbreviated as UTRAN), which provides radio resources for MBMS services on the air interface. 105 represents user equipment (referred to as UE), which is a terminal device for receiving data. 106 represents a Home Location Register (HLR for short), which stores data related to users 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. The radio resources used by MBMS services are not dedicated to users, but shared by all users of this service.

Fig. 1 B shows the system architecture involved in the method of the present invention, wherein UTRAN 104 comprises Serving Radio Network Controller 1401 (hereinafter referred to as SRNC) and Drift Radio Network Controller 1402 (hereinafter referred to as DRNC), wherein 1043 Iur represents SRNC1401 and DRNC Iur interface between 1402.

On the Iur interface, the method for releasing the radio link (hereinafter referred to as RL) resource for UE in DRNC 1402 is as shown in Figure 2. At 201, the SRNC sends a "Radio Link Delete Request" message to the DRNC. At 202, after the DRNC receives the message, it releases the radio links and related resources indicated in the message. If all the radio links of the UE in the DRNC are deleted, and the UE does not use the public resources of the DRNC, the DRNC releases the UE context. Then the DRNC sends a "radio link deletion response" message to the SRNC.

The process of releasing the common transport channel resources occupied by the UE in the DRNC on the Iur interface is shown in FIG. 3 . At 301, the SRNC initiates a process of releasing common transport channel resources for a certain UE in the DRNC by sending a "common transport channel resource release request" message to the DRNC. After receiving this message, DRNC releases the common resources used by UE. If UE does not use dedicated resources, DRNC releases UE context, otherwise, it just releases the radio network temporary identity (hereinafter referred to as C-RNTI) of the cell.

In the above-mentioned prior art, when the UE joining the MBMS service is in the CELL_DCH state (the cell dedicated channel connection state) or the CELL_FACH state (the cell forward access channel connection state), and no longer occupies the resources of the DRNC, the UE dedicated The Iur process of the UE is used to complete the de-linking process of the UE. If the UE is in the CELL_DCH state, the SRNC sends a "radio link deletion request" message to the DRNC. When the UE is in the CELL_FACH state, the SRNC sends a "common transport channel resource release request" message to the DRNC. When UE transitions from CELL_DCH state to idle mode and URA_PCH state (terrestrial radio access network registration area paging channel connection state) and CELL_PCH state (cell paging channel connection state), the operation of DRNC is different, from CELL_DCH to CELL_PCH DRNC does not need to update the MBMS context and release the MBMS UE context. When transferring from CELL_DCH to idle mode and URA_PCH, DRNC needs to update the MBMS context and release the MBMS UE context. However, the procedures performed in the prior art cannot distinguish whether the state of the UE is transferred to the CELL_PCH or the idle mode and the URA_PCH. The same problem exists for UEs in CELL_FACH state. Therefore, it is necessary to notify the DRNC whether to update the MBMS context and update the MBMS UE context.

Contents of the invention

Aiming at the problem that the drift wireless network controller cannot correctly maintain and manage the context information of multimedia broadcast and multicast in the prior art, the present invention adds new information elements to the existing message, and completes the multimedia broadcast and group broadcast through the existing Iur dedicated process. The de-linking method of the broadcast UE, that is, the serving radio network controller notifies the drift radio network controller whether to update the multimedia broadcast and multicast context and release the multimedia broadcast and multicast user equipment context. This enables the drift wireless network controller to have a correct processing flow when processing the state transition of the equipment joining the multimedia broadcast and multicast service. The purpose of the present invention is to provide a method for completing the Iur interface user equipment de-linking process through the existing process, so as to solve the above existing problems.

Therefore, in one aspect of the present invention, a method for managing user equipment for multimedia broadcast and multicast services at the interface between the serving radio network controller and the drift radio network controller is proposed, including the steps: the serving radio network controller passes Sending a message including indication information indicating whether to operate the context related to the multimedia broadcast and multicast service, to notify the drift radio network controller whether to update the multimedia broadcast and multicast context and release the multimedia broadcast and multicast service user equipment context.

In the above method according to the present invention, when the user equipment is in the cell-dedicated channel connection state, the method includes: 1) the serving radio network controller decides to release the radio link of the drift radio network controller used by the user equipment; 2) the serving radio network controller The network controller sends a "radio link deletion request" message to the drift radio network controller, and the information element "multimedia broadcast and multicast indication" is added to the "radio link deletion request" message to notify the drift radio network controller Whether it is necessary to operate context information related to multimedia broadcasting and multicasting; 3) The drift radio network controller receives the "radio link deletion request" message; 4) the drift radio network controller releases the "radio link deletion request" message indicated Wireless links and related resources, and according to the information element "multimedia broadcast and multicast indication" received in the message of 'wireless link deletion request', decide whether to operate the context related to multimedia broadcast and multicast; and 5) Drift wireless The network controller sends a "radio link deletion response" message to the serving radio network controller.

The above step 4) and step 5) have no absolute sequence, step 5) can be executed first after step 3) is executed, and then step 4) is executed.

In the above-mentioned method according to the present invention, the user equipment is in the cell forward access channel connection state, and the method includes: 1) The serving radio network controller decides to release the common transmission channel resource used for a certain user equipment in the drifting radio network controller ; 2) The serving radio network controller sends a "common transport channel resource release request" message to the drift radio network controller, and the information element "multimedia broadcast and multicast indication" is added to the 'common transport channel resource release request' message, 3) The drift radio network controller receives the message of "common transport channel resource release request"; 4) The drift radio network controller releases the resource used by the user equipment public resources, and according to the information element "Multimedia Broadcast and Multicast Indication" in the received 'Common Transport Channel Resource Release Request' message, decide whether to operate the context related to Multimedia Broadcast and Multicast; and 5) Drift wireless network control The device sends a "Common Transport Channel Resource Release Response" message to the serving radio network controller.

Through the method for managing multimedia broadcast and multicast user equipment on the Iur interface provided by the present invention, the drift wireless network controller can correctly manage and maintain the context of multimedia broadcast and multicast user equipment and the context of multimedia broadcast and multicast user equipment.

Description of drawings

FIG. 1A is a logical network device diagram of MBMS services;

Fig. 1B is the system structure involved in the method of the present invention;

Fig. 2 is the existing Iur interface wireless link deletion process;

Fig. 3 is the existing Iur interface public transport channel resource release process;

Fig. 4 is a wireless link deletion process according to the present invention;

Fig. 5 is a radio link deletion process and a service radio network controller operation flow according to the present invention;

Fig. 6 is according to radio link deletion process and DRNC operation flow of the present invention;

FIG. 7 is a process of releasing common transport channel resources according to the present invention;

Fig. 8 is the operation process of the public transport channel resource release process and SNRC according to the present invention;

Fig. 9 is the process of releasing common transport channel resources and the operation flow of DRNC according to the present invention.

Detailed ways

The method for managing MBMS UE on the Iur interface of the present invention is described below in conjunction with Fig. 4 to Fig. 9, and unnecessary details and functions for the present invention are omitted in the description process to prevent confusion to the understanding of the present invention.

Provided in the present invention is that SRNC completes the method for MBMS UE to connect through the existing Iur special process, promptly informs DRNC whether to operate the method for the relevant context information of MBMS, makes DRNC have correctness when processing the state transition of the UE that joins MBMS service processing flow.

Figure 4 shows the new radio link deletion process when the UE joining the MBMS service is in the CELL_DCH state. Through this process, the SRNC notifies the DRNC whether to update the MBMS context and release the MBMS UE context.

In step 401, when the UE joins the MBMS service and is in the CELL_DCH state, when the SRNC decides to delete one or more radio links of the DRNC, the SRNC sends a "radio link deletion request" message to the DRNC. The information element "MBMS indication" is added to the "radio link deletion request" message. This information element is optional and exists when the UE has joined one or more MBMS services. The DRNC is notified whether to update the MBMS context and release the MBMS UE context by setting this information element to a different value.

For example, a value of 0 for "MBMS indication" means that there is no need to update the MBMS context and release the MBMS UE context, and a value of 1 for "MBMS indication" means that it is necessary to update the MBMS context and release the MBMS UE context.

Another solution is: the SRNC only sets the "MBMS indication" to exist when the DRNC does not need to operate the MBMS-related context information, or sets this information element to not exist.

In step 402, after receiving the "radio link deletion request" message, the DRNC releases the radio link and related resources indicated in the message. public resources, the DRNC releases the UE context. The DRNC decides whether to update the MBMS context and release the MBMS UE context according to the information element "MBMS indication" in the received message, and then the DRNC sends a "radio link deletion response" message to the SRNC.

Fig. 5 is the operation flow corresponding to the new radio link deletion procedure SRNC.

In step 501, the SRNC decides to release the radio link of the DRNC used by the UE. In step 502, the SRNC checks whether the UE has joined the MBMS service. If the UE does not join the MBMS service, then in step 503, the SRNC sets the information element "MBMS indication" in the "radio link deletion request" message as non-existent. If the UE has joined the MBMS service, in step 504, the SRNC sets different values of "MBMS indication" according to whether the target state to which the UE is transferred is idle mode and URA_PCH or CELL_PCH. If the target state of the UE is idle mode and URA_PCH, in step 505, the SRNC sets the value of the information element "MBMS indication" in the "radio link deletion request" message, such as 0; if the target state of the UE is CELL_PCH, in step 506, The SRNC sets the information element "MBMS indication" in the "radio link deletion request" message to a corresponding value, such as 1. Corresponding to the content described in steps 505 and 506, another method is that the SRNC only sets the existence of the "MBMS indication" when the DRNC does not need the context information related to the operation of the MBMS; otherwise, it sets the information element to not exist. Then, in step 507, the SRNC sends a "radio link deletion request" message to the DRNC.

Fig. 6 is the operation flow of DRNC corresponding to the radio link deletion procedure of the present invention.

In step 601, the RNC receives a message. In step 602, if the DRNC receives the "radio link deletion request" message from the SRNC, then in step 603, the DRNC releases the radio link and related resources indicated in the message, if the UE is in all radio links of the DRNC Deleted, and the UE does not use the public resources of the DRNC, and the DRNC releases the UE context. In step 604, the DRNC checks whether the UE has joined the MBMS service, and whether the information element "MBMS indication" in the message exists and the MBMS context or the MBMS UE context, the DRNC can know whether the UE has joined the MBMS service. If the UE does not join the MBMS service, directly perform the operation described in step 607, that is, the DRNC sends a 'radio link deletion response' message to the SRNC. If the UE has joined the MBMS service, in step 605, the DRNC knows whether to update the MBMS context and release the MBMS UE context according to the "MBMS indication" in the "radio link deletion request" message. If there is no need to update the MBMS context, the operation described in step 607 is directly performed. Otherwise, if DRNC deletes this UE from MBMS context in step 606, release the MBMS UE context corresponding to this UE. In step 607, DRNC sends a "radio link deletion response" message to SRNC. DRNC can also send the response message in step 607 to SRNC before releasing relevant resources, that is, the process performed in step 607 can occur before steps 603-606, and there is no absolute sequence for DRNC to release resources and send a response message to SRNC.

Fig. 7 is when the UE that joins MBMS service is in CELL_FACH state, the process that SRNC releases the common transmission channel resource that is used for certain UE in DRNC, through this process SRNC informs DRNC whether to update MBMS context and release MBMS UE context.

First, in step 701, when the UE joins the MBMS service and is in the CELL_FACH state, when the SRNC decides to release the common transport channel resources for a certain UE in the DRNC, the SRNC sends a "common transport channel resource release request" message to the DRNC. The information element "MBMS indication" is added in the "radio link deletion request" message. This information element is optional and exists when the UE has joined one or more MBMS services. The DRNC is notified whether to update the MBMS context and release the MBMS UE context by setting this information element to a different value. For example, a value of 0 for "MBMS indication" means that there is no need to update the MBMS context and release the MBMS UE context, and a value of 1 for "MBMS indication" means that it is necessary to update the MBMS context and release the MBMS UE context. Another solution is: the SRNC only sets the "MBMS indication" to exist when the DRNC does not need to operate the MBMS-related context information, or sets this information element to not exist.

After the DRNC receives the "common transport channel resource release request" message, it releases the common resources used by the UE. If the UE does not use dedicated resources, the DRNC releases the UE context, otherwise, it only releases the radio network temporary identity of the cell (hereinafter referred to as C-RNTI) . DRNC decides whether to update the MBMS context and release the MBMS UE context according to the information element "MBMS indication" in the received message.

FIG. 8 is an operation flow of the SRNC corresponding to the common transport channel resource release procedure of the present invention.

In step 801, the SRNC decides to release the common transport channel resources of the DRNC used by the UE. In step 802, the SRNC checks whether the UE has joined the MBMS service. If the UE does not join the MBMS service, then in step 803, the SRNC sets the information element "MBMS indication" in the "common transport channel resource release request" message as non-existent. If the UE has joined the MBMS service, then in step 804 the SRNC sets different values of "MBMS indication" according to whether the target state the UE will transfer to is idle mode and URA_PCH or CELL_PCH. If the target state of UE is idle mode and URA_PCH, in step 805 SRNC sets the value of information element " MBMS instruction " in " common transport channel resource release request " message, for example 0; If the target state of UE is CELL_PCH, then in step 806 The SRNC sets the information element "MBMS Indication" in the message "Common Transport Channel Resource Release Request" to a corresponding value, such as 1. Corresponding to steps 805 and 806, another method is that the SRNC only sets the existence of the "MBMS indication" when the context information related to MBMS operation by the DRNC is not required, otherwise, sets this information element to not exist. Finally, in step 807 SRNC sends a "common transport channel resource release request" message to DRNC.

FIG. 9 is an operation flow of the DRNC corresponding to a new public transport channel resource release process.

In step 901, the RNC receives a message. In step 902, if DRNC receives the "common transport channel resource release request" message from SRNC, then in step 903 DRNC releases the common resources used by UE, if UE does not use dedicated resources, DRNC releases UE context, otherwise, just releases the cell Radio Network Temporary Identifier (hereinafter referred to as C-RNTI). In step 904, the DRNC checks whether the UE has joined the MBMS service, and whether the information element "MBMS indication" in the message exists and the MBMS context or the MBMS UE context, the DRNC can know whether the UE has joined the MBMS service. If the UE does not join the MBMS service, the process of releasing the common transport channel resources ends. If the UE has joined the MBMS service, in step 905 the DRNC knows whether to update the MBMS context and release the MBMS UE context according to the "MBMS indication" in the "common transport channel resource release request" message. If there is no need to operate MBMS-related context information, the process of releasing common transport channel resources is ended. If need to operate MBMS relevant context information, in step 906 DRNC deletes this UE from MBMS context, releases the MBMS UE context corresponding to this UE.

Through the method for managing the MBMS UE on the Iur interface provided by the present invention, the DRNC can correctly manage the MBMS context and the MBMS UE context.

Although the present invention has been described in detail in conjunction with specific embodiments, the above description is illustrative rather than limiting to the present invention. The present invention may have other specific forms without departing from its spirit and essential characteristics. Therefore, it is intended to embrace the scope of the invention defined by the claims rather than the above description, and all changes within the meaning and range equivalent to the claims.

Claims (13)

1. One kind between service wireless network controller and floating radio network controller interface management multimedia broadcasting and the method for multicast service user device, comprise step: service wireless network controller comprises by transmission whether expression needs to operate the message of the contextual indication information relevant with multimedia broadcasting and multicast service, notifies floating radio network controller whether to upgrade multimedia broadcasting and multicast context and release multimedia broadcasting and multicast service user device context.
2. 2. method according to claim 1 is characterized in that: subscriber equipment is in the cell private channel connection status, and this method comprises:

   1) the service wireless network controller decision discharges the Radio Link of the floating radio network controller of subscriber equipment use;

   2) service wireless network controller sends " Radio Link removal request " message and gives floating radio network controller, and whether increased information element " multimedia broadcasting and multicast indication " in described ' Radio Link removal request ' message needs to operate the multimedia broadcasting contextual information relevant with multicast with the notice floating radio network controller;

   3) floating radio network controller is received " Radio Link removal request " message;

   4) floating radio network controller discharges the Radio Link and the related resource of indicating in ' Radio Link removal request ' message, and according to the information element of receiving in ' Radio Link removal request ' message " multimedia broadcasting and multicast indication ", whether decision needs to operate the multimedia broadcasting context relevant with multicast; And

   5) floating radio network controller sends " Radio Link deletion response " message and gives service wireless network controller.
3. 3. method according to claim 2, it is characterized in that, when operating the multimedia broadcasting context relevant if desired with multicast, floating radio network controller is deleted corresponding subscriber equipment from multimedia broadcasting and multicast context, and discharges multimedia broadcasting and multicast user's device context of relative user equipment.
4. 4. according to claim 2 or 3 described methods, it is characterized in that: the information element in " Radio Link removal request " message " multimedia broadcasting and multicast indication " is optional, if subscriber equipment does not add multimedia broadcasting and multicast service, this information element is set does not exist.
5. 5. according to claim 2 or 3 described methods, it is characterized in that: information element in " Radio Link removal request " message " multimedia broadcasting and multicast indication " is optional, if do not need the floating radio network controller operation multimedia broadcasting context relevant, this information element be set exist with multicast.
6. 6. method according to claim 1 is characterized in that: subscriber equipment is in the cell private channel connection status, and this method comprises:

   1) the service wireless network controller decision discharges the Radio Link of the floating radio network controller of subscriber equipment use;

   2) service wireless network controller sends " Radio Link removal request " message and gives floating radio network controller, increased information element " multimedia broadcasting and multicast indication " in described ' Radio Link removal request ' message, whether needed to operate the multimedia broadcasting context relevant with multicast with the notice floating radio network controller;

   3) floating radio network controller is received " Radio Link removal request " message;

   4) floating radio network controller sends " Radio Link deletion response " message and gives service wireless network controller; And

   5) floating radio network controller discharges the Radio Link and the related resource of indicating in ' Radio Link removal request ' message, and according to the information element in ' Radio Link removal request ' message of receiving " multimedia broadcasting and multicast indication ", whether decision needs to operate the multimedia broadcasting context relevant with multicast.
7. 7. method according to claim 6, it is characterized in that, when operating the multimedia broadcasting context relevant if desired with multicast, floating radio network controller is deleted corresponding subscriber equipment from multimedia broadcasting and multicast context, and discharges multimedia broadcasting and multicast user's device context of relative user equipment.
8. 8. according to claim 6 or 7 described methods, it is characterized in that: information element in " Radio Link removal request " message " multimedia broadcasting and multicast indication " is optional, if subscriber equipment does not add multimedia broadcasting and multicast service, this information element is set does not exist.
9. 9. according to claim 6 or 7 described methods, it is characterized in that: information element in " Radio Link removal request " message " multimedia broadcasting and multicast indication " is optional, if do not need the floating radio network controller operation multimedia broadcasting contextual information relevant, this information element be set exist with multicast.
10. 10. method according to claim 1 is characterized in that: subscriber equipment is in the cell forward access channel connection status, and this method comprises:

    1) the service wireless network controller decision discharges the public transmission channel resource that is used for certain subscriber equipment in the floating radio network controller;

    2) service wireless network controller transmission " public transmission channel resource discharges request information and gives floating radio network controller; increased information element " multimedia broadcasting and multicast are indicated " in described ' public transmission channel resource discharges request ' message, whether needed to operate the multimedia broadcasting context relevant with multicast with the notice floating radio network controller;

    3) floating radio network controller receives that " public transmission channel resource discharges request information;

    4) floating radio network controller discharges the public resource that subscriber equipment uses, and according to the information element in ' public transmission channel resource discharges request ' message of receiving " multimedia broadcasting and multicast indication ", whether decision needs to operate the multimedia broadcasting context relevant with multicast; And

    5) floating radio network controller sends " public transmission channel resource discharges response " message to service wireless network controller.
11. 11. method according to claim 10, it is characterized in that, when operating the multimedia broadcasting context relevant if desired with multicast, floating radio network controller is deleted corresponding subscriber equipment from multimedia broadcasting and multicast context, and discharges multimedia broadcasting and multicast user's device context of relative user equipment.
12. 12. according to the described method of one of claim 10-11, it is characterized in that, " information element " multimedia broadcasting and multicast indication " that public transmission channel resource discharges in the request information is optional; if subscriber equipment does not add multimedia broadcasting and multicast service, this information element is set does not exist.
13. 13. according to the described method of one of claim 10-11, it is characterized in that: " information element " multimedia broadcasting and multicast indication " that public transmission channel resource discharges in the request information is optional; if do not need the floating radio network controller operation multimedia broadcasting context relevant with multicast, this information element is set exists.

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