CN101296474B - Method and device for distributing transmission resource for mobile station - Google Patents

Abstract

The present invention provides a method for allocating transmission resources for a mobile station. The method includes sending a notification message to a mobile station in an idle state on a control channel; The resource transmits downlink data. Through the technical solution provided by the embodiment of the present invention, when the current cell does not have enough resources to allocate to the mobile station, an appropriate cell can be selected according to the measurement report to allocate resources for the mobile station, and through the common control channel or the packet common control channel Send a packet switching command to the mobile station to notify the mobile station to dynamically access the target cell to receive downlink data, so as to better meet the user's data transmission requirements.

Description

Method and device for allocating transmission resource for mobile station

technical field

The invention relates to the field of communication technology, in particular to a method and device for allocating transmission resources for a mobile station.

Background technique

With the advancement of science and technology, people's requirements for mobile communication services and quality are also constantly improving, so the demand for a smooth transition to the third generation (3G) mobile communication technology is proposed. The main technology for the evolution to 3G is General Packet Radio Service (GPRS) , General Packer Radio Service), Enhanced Data Rate for GSM Evolution (EDGE, Enhanced Data Rate for GSM Evolution), High Speed Circuit Switching Data Service (HSCSD, High Speed Circuit Switching Data), and the focus of research is on the use of Limited spectrum resources increase transmission rate and reduce transmission delay.

GPRS is a packet data switching technology introduced in the Global System for Mobile Communication (GSM, Global System for Mobilecommunication) network. It is superimposed on the GSM system and prolongs the service life of GSM. It is based on the forwarding of packet data packets and the statistical multiplexing of channels, so that the data service provided by the existing GSM leaps from 9.6Kbps to more than 100Kbps for the first time. Since GPRS still uses the same Gaussian Minimum Shift Keying (GMSK, Gaussian Minimum Shift Keying) modulation method as GSM, the transmission rate cannot reach the 2Mbps required by 3G services. In order to fully meet the bandwidth requirements of future wireless multimedia applications, EDGE provides a Transitional scheme from GPRS to the third generation mobile communication. EDGE is a data-enhanced mobile communication technology based on GSM/GPRS network, and it is usually called 2.75G technology. This technology mainly lies in the ability to use broadband services, enabling networks using 800, 900, 1800, and 1900MHz frequency bands to provide some functions of the third-generation mobile communication network.

During packet data transmission, a temporary block flow (TBF, Temporary Block Flow, TBF) needs to be established between two transmission entities to support unidirectional upper layer packet data on the packet data physical channel (PDCH, Packet DataChannel) Transmission of units (PDU, Packet Data Unit).

FIG. 1 is a method for allocating transmission resources for a mobile station in the prior art, and the specific process is as follows:

Step 101: the serving GPRS support node (SGSN, Serving GPRS Support Node) sends the downlink data carrying the packet flow sign (PFI, Packet Flow Identifier) to the base station (BSS, Base Station System), and the PFI is used to mark the packet flow context ( PFC, Packet Flow Context), PFC is a description of the quality of service (QoS, Quality of Service) parameters provided by SGSN to BSS and user data transmission;

Step 102: The BSS judges whether there is corresponding PFC information in the downlink data, if yes, proceed to step 105, if not, proceed to step 103;

Step 103: BSS sends a request to download PFC to SGSN;

Step 104: SGSN sends the corresponding QoS information of PFI to BSS;

Step 105: The BSS judges whether there are enough resources to meet the requirements of the QoS parameter, if yes, then proceed to step 106, if not, then proceed to step 107;

Step 106: The BSS allocates wireless resources for the mobile station (MS, Mobile Station) to transmit the downlink data, and transmits the downlink data on the common control channel (CCCH, Common Control Channel) or packet common control channel (PCCCH, Packet Common Control Channel) through the TBF assignment message ) to notify MS.

Step 107: The BSS refuses to allocate radio resources for the MS, and discards the downlink data.

In the prior art, when allocating downlink transmission resources for a mobile station in packet idle state, if the current cell does not have enough resources, the BSS refuses to allocate radio resources for the MS, and discards the downlink data. Therefore, during the process of creating the present invention, the inventor found that at least the following problems exist in the prior art: in the prior art, when the current cell does not have enough resources, it cannot allocate radio resources for MSs with idle groups to transmit downlink data, Thus affecting the transmission of data in the network.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and device for allocating transmission resources for mobile stations, which can select cell base stations with sufficient resources to allocate wireless resources for mobile stations in group idle state to transmit downlink data.

In order to solve the above technical problems, the purpose of the embodiments of the present invention is achieved through the following technical solutions:

An embodiment of the present invention provides a method for allocating transmission resources for a mobile station, including:

Judging whether the current cell has resources to meet the quality of service requirements for downlink data transmission of the mobile station, if not, then select a target cell that has resources that meet the quality of service requirements for downlink data transmission to allocate wireless resources for the mobile station, and according to the allocated wireless resources Resource construction packet switching command; send the packet switching command to the mobile station in the idle state on the control channel, and notify the mobile station to use the wireless resources allocated by the target cell for the mobile station to transmit downlink data, so that the mobile station can switch according to the received packet Command to use the radio resources allocated by the target cell to transmit downlink data.

The embodiment of the present invention also provides an apparatus for allocating transmission resources for a mobile station, including:

A judging unit, configured to judge whether the current cell has resources to meet the quality of service requirements for downlink data transmission;

The selection unit is configured to select a target cell with resources meeting the quality of service requirements for downlink data transmission to allocate wireless resources for the mobile station when the judgment result of the judging unit is that the current cell has no resources to meet the quality of service requirements for downlink data transmission, and according to the selected The assigned wireless resource constructs a packet switching command and sends it to the control unit;

The control unit is used to send a packet switching command on the control channel, and notify the mobile station in the idle state to use the radio resource allocated by the target cell to transmit downlink data.

Through the method and device for allocating transmission resources for the mobile station provided by the embodiments of the present invention, when the current cell base station does not have enough resources to allocate to the mobile station, an appropriate cell base station can be selected to allocate resources for the mobile station according to the measurement report, and through CCCH or PCCCH sends a packet switching command to the mobile station to notify the base station of dynamically accessing the target cell to receive downlink data, so as to better meet user data transmission requirements.

Description of drawings

FIG. 1 is a method for allocating transmission resources for a mobile station in the prior art;

FIG. 2 is a signaling flow chart of the first embodiment of the method for allocating transmission resources for a mobile station according to the present invention;

FIG. 3 is a signaling flowchart of a second embodiment of a method for allocating transmission resources for a mobile station according to the present invention;

Fig. 4 is a structural diagram of a preferred embodiment of the device for allocating transmission resources for a mobile station according to the present invention.

Detailed ways

Embodiments of the present invention provide a method and device for allocating transmission resources for a mobile station. In order to make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

Please refer to FIG. 2 , which is a signaling flowchart of the first embodiment of the method for allocating transmission resources for a mobile station according to the present invention. In this embodiment, the base station has measurement reports about the signal quality and resource status of adjacent cells that are periodically reported by the mobile station. The method for allocating downlink transmission resources includes:

Step 201: In order to transmit downlink data to the MS, the SGSN first sends downlink data with PFI information to the base station system 1 (BSS1) of the current cell;

The PFI is used to mark the PFC, and the PFC includes the description of the QoS parameters in the data transmission provided by the SGSN to the BSS and the user, and the QoS parameters include requirements such as data transmission rate.

Step 202: the current cell judges whether there are enough resources to meet the QoS parameter requirements in the PFI, if yes, proceed to step 203, if not, proceed to step 204;

Step 203: The current cell allocates radio resources for the MS to transmit the downlink data, and informs the MS through a TBF assignment message on the CCCH.

Since the MS is in the packet idle mode, the BSS informs the MS through a TBF assignment message on a paging control channel (PCH, PagingChannel) of the CCCH.

Step 204: According to the measurement report reported by the MS periodically, the current cell selects an adjacent cell that meets the radio quality requirements as the target cell, and sends a packet handover request to the SGSN, requesting the target cell to allocate downlink transmission resources for the MS. The packet handover request carries the The above QoS information and the information of the target cell;

When the MS is in the GPRS mobility management ready state, it will periodically send measurement reports to the network, but in other states such as GPRS mobility management standby state, it will not periodically send measurement reports to the network. In this embodiment, when the MS is in the GPRS mobility management ready state, it periodically sends measurement reports to the network, so the current cell has the measurement reports reported by the MS periodically. The measurement report carries information of several neighboring cells with the best radio quality, so the current cell can select a target cell with better radio quality according to the measurement report reported by the MS.

Step 205: The SGSN sends a packet switching request to the base station system 2 (BSS2) of the target cell according to the information of the target cell provided in the packet switching request, and the packet switching request carries the QoS information;

The target cell can be a 2G or 3G network cell. If it is a 2G network cell, the packet handover request sent to the target cell carries the PFI list that needs to be established; if it is a 3G network cell, the redirection request sent to the target cell The request carries a list of radio access bearers (RAB, RadioAccess Bearer) to be established, and the RAB is a channel for transmitting data in the 3G network. In this embodiment, the target cell is a 2G network, so the packet handover request sent to the target cell carries the PFI list to be established.

Step 206: The target cell allocates radio resources for the MS and establishes a TBF according to the QoS information, and returns a packet switching response message to the SGSN, the packet switching response message carrying the radio resources allocated for the MS and the PFI information;

Step 207: The SGSN returns a packet handover response message to the BSS1 of the current cell, carrying the radio resource allocated for the MS by the target cell and the PFI information;

Step 208: After the BSS1 of the current cell receives the response message of the packet handover, it judges whether the BSS2 of the target cell has allocated suitable resources for the MS, if yes, proceed to step 210, and if not, proceed to step 209;

Since the packet handover response message returned by the SGSN to the BSS1 of the current cell carries the PFI information established by the BSS2 of the target cell for the MS, it can be judged whether the target cell is an MS according to the receipt of the packet switching response message by the BSS1 of the current cell Appropriate resources are allocated.

Step 209: the current cell sends a packet handover cancel command to the SGSN, and discards the downlink data sent by the SGSN.

Step 210: the current cell constructs a handover command according to the radio resource information allocated in the packet handover response message returned by the target cell and the flag information indicating the mobile station;

The identification information indicating the mobile station is Temporary Logical Link Identifier (TLLI, Temporary Logical Link Identifier).

Step 211: The current cell sends a packet switching command to the MS through the PCH of the CCCH, carrying the information of the target cell, the TBF resource information allocated by the target cell to the MS, the flag information indicating the MS, etc.;

Step 212: The MS accesses the target cell according to the packet switching command, and uses the resource of the target cell provided in the packet switching command to transmit the downlink data sent by the SGSN.

According to the first embodiment of the method of allocating transmission resources for mobile stations in the present invention, when the current cell base station does not have enough resources to allocate to the mobile station, an appropriate cell base station can be selected to allocate resources for the mobile station according to the measurement report, and send packets through CCCH The handover command is sent to the mobile station to notify the mobile station to access the base station of the target cell to receive downlink data, so that the user data transmission requirements can be better met.

Fig. 3 is a signaling flow chart of the second embodiment of the method for allocating transmission resources for the mobile station according to the present invention. In this embodiment, the base station requests the mobile station to report a measurement report. The method for allocating downlink transmission resources specifically includes:

Step 301: In order to transmit downlink data to the MS in the idle state, the SGSN first sends downlink data with PFI to the base station 1 (BSS1) of the current cell;

The PFI is used to mark the PFC, and the PFC includes the description of the QoS parameters in the data transmission provided by the SGSN to the BSS and the user, and the QoS parameters include requirements such as data transmission rate.

Step 302: the current cell judges whether there are enough resources to meet the QoS parameter requirements in the PFI, if yes, proceed to step 303, if not, proceed to step 304;

Step 303: The current cell allocates radio resources for the MS to transmit the downlink data, and informs the MS through a TBF assignment message on the CCCH;

Since the MS is in packet idle mode, the BSS informs the MS through a TBF assignment message on the PCH of the CCCH.

Use the established TBF to transmit the downlink data sent by the SGSN.

Step 304: The current cell sends a message requesting the MS to report a measurement report to the MS on the PCH of the CCCH;

In this embodiment, the MS is in the GPRS mobility management standby state, and the MS will not report the measurement report to the network periodically, so the current cell needs to request the MS to report the message of the measurement report, and the message of requesting the mobile station to report the measurement report includes using In order to indicate the uplink radio resource block information allocated for the mobile station, the mobile station reports a measurement report through the uplink radio resource block.

Step 305: The MS sends a measurement report to the current cell on a Packet Associated Control Channel (PACCH, Packet Associated Control Channel) through the uplink radio resource block;

Step 306: The current cell selects a target cell that meets the radio quality requirements according to the measurement report reported by the MS, and sends a packet handover request to the SGSN, requesting the target cell to allocate downlink transmission resources for the MS, and the packet handover request carries the QoS information and information on the target community;

Step 307: The SGSN sends a packet switching request to the base station system 2 (BSS2) of the target cell according to the information of the target cell provided in the packet switching request, and the packet switching request carries the PFI information;

The target cell can be a 2G or 3G network cell. If it is a 2G network cell, the packet handover request sent to the target cell carries the PFI list that needs to be established; if it is a 3G network cell, the redirection request sent to the target cell The request carries a list of radio access bearers (RAB, RadioAccess Bearer) to be established, and the RAB is a channel for transmitting data in the 3G network. In this embodiment, the target cell is a 2G network, so the packet handover request sent to the target cell carries the PFI list to be established.

Step 308: The target cell allocates radio resources for the MS and establishes a TBF according to the QoS information, and returns a packet handover response message to the SGSN, the redirection response message carrying the radio resources allocated for the MS and the PFI information;

Step 309: The SGSN returns a packet handover response message to the BSS1 of the current cell, carrying the radio resources allocated by the target cell for the MS;

Step 310: after the current cell receives the packet handover response message, judge whether the target cell has allocated suitable resources for the MS, if yes, go to step 312, if not, go to step 311;

Step 311: the current cell sends a packet handover cancel command to the SGSN, and discards the downlink data sent by the SGSN.

Step 312: the current cell constructs a handover command according to the radio resource information allocated in the packet handover response message returned by the target cell and the flag information indicating the mobile station;

The flag information indicating the mobile station is TLLI.

Step 313: BSS1 of the current cell sends a packet switching command to the MS through the PCH of the CCCH, carrying the information of the target cell and the radio resources allocated by the target cell to the MS;

Step 314: The MS accesses the target cell according to the packet switching command, and uses the resource of the target cell provided in the packet switching command to transmit the downlink data sent by the SGSN.

Through the second embodiment of the method of allocating transmission resources for mobile stations in the present invention, when the base station of the current cell does not have enough resources to allocate to the mobile station and there is no measurement report, it can order the mobile station to report a measurement report, and select a suitable cell according to the reported measurement report The base station allocates resources for the mobile station, and sends a packet switching command to the mobile station through the CCCH, notifying the mobile station to access the base station of the target cell to receive downlink data, so as to better meet the user data transmission requirements.

The packet handover command in the above two embodiments is constructed by the base station of the current cell, or the base station of the target cell can construct the handover command according to the radio resource information allocated for the mobile station and the flag information indicating the mobile station, and notify the current cell through a handover response message. cell, the flag information indicating the mobile station may be notified to the target cell through a handover request message.

The packet switching command in the above two embodiments is sent to the mobile station on the PCH of the CCCH, or it can be sent to the mobile station on the PPCH of the PCCCH, which is determined by the network configuration.

Please refer to FIG. 4 , which is a structural diagram of a preferred embodiment of an apparatus for allocating transmission resources for a mobile station according to the present invention. The device for allocating transmission resources for a mobile station includes: a judgment unit 41 , a selection unit 42 , and a control unit 43 .

The judging unit 41 is configured to judge whether the current cell base station has resources to meet the quality of service requirements for downlink data transmission.

The selection unit 42 is configured to select, according to the measurement report provided by the mobile station, a cell that satisfies the radio quality requirement as the cell base station when the judgment result of the judging unit 41 is that the base station of the current cell has no resources to meet the quality of service requirements for downlink data transmission. The mobile station allocates radio resources, and constructs a packet switching command according to the allocated radio resources and sends it to the control unit.

The control unit 43 is configured to send the packet switching command to the mobile station on the common control channel or the packet common control channel according to the packet switching command sent by the selection unit 42, and notify the mobile station in the idle state to use the target cell The radio resource allocated for the mobile station transmits downlink data.

Through the preferred embodiment of the device for allocating transmission resources for mobile stations in the present invention, when the current cell base station does not have enough resources to allocate to the mobile station, an appropriate cell base station can be selected to allocate resources for the mobile station, and send a packet switching command through CCCH or PCCCH To the mobile station, notify the mobile station to access the target cell to receive downlink data, so as to better meet user data transmission requirements.

Through the method and device for allocating transmission resources for the mobile station provided by the embodiments of the present invention, when the current cell base station does not have enough resources to allocate to the mobile station, an appropriate cell base station can be selected to allocate resources for the mobile station according to the measurement report, and through The CCCH or PCCCH sends a packet switching command to the mobile station, notifying the mobile station to dynamically access the target cell to receive downlink data, so as to better meet the user data transmission requirements.

A method for allocating transmission resources for a mobile station provided by the present invention and its device have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for To help understand the technical solutions disclosed in the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the contents of this specification are not It should be understood as a limitation of the present invention.

Claims (10)

1. A method for allocating transmission resources for a mobile station, characterized in that the method comprises: Judging whether the current cell has resources to meet the quality of service requirements for downlink data transmission of the mobile station, if not, then select a target cell that has resources that meet the quality of service requirements for downlink data transmission to allocate wireless resources for the mobile station, and according to the allocated wireless resources Resource construction group switching command; Send a packet switching command on the control channel to the mobile station in the idle state, and notify the mobile station to use the radio resources allocated by the target cell for the mobile station to transmit downlink data, so that the mobile station uses the target cell according to the received packet switching command. The radio resource allocated by it transmits downlink data; Wherein, the specific manner of allocating downlink transmission resources for the mobile station by the target cell is as follows: The current cell sends a packet handover request message carrying information indicated by the QoS requirement parameter for downlink data transmission, and requests the target cell to allocate downlink transmission resources that meet the QoS requirement for downlink data transmission for the mobile station; The target cell returns a packet handover response message carrying the radio resource information allocated for the mobile station. 2. The method for allocating transmission resources for a mobile station according to claim 1, characterized in that, The control channel is specifically: a common control channel or a packet common control channel. 3. The method for allocating transmission resources for a mobile station according to claim 1, wherein the specific method for allocating wireless resources for the mobile station by selecting the target cell that meets the quality of service requirement resource for downlink data transmission is as follows: According to the measurement report periodically reported by the mobile station, a target cell with resources meeting the quality of service requirements for downlink data transmission is selected to allocate radio resources for the mobile station. 4. The method for allocating transmission resources for a mobile station according to claim 1, wherein the specific method for allocating wireless resources for the mobile station by selecting a target cell that meets the quality of service requirement resource for downlink data transmission is as follows: Sending a message requesting the mobile station to report a measurement report to the mobile station; The mobile station reports the measurement report according to the message requesting the mobile station to report the measurement report; According to the measurement report reported by the mobile station, a target cell with resources meeting the quality of service requirement for downlink data transmission is selected to allocate radio resources to the mobile station. 5. The method for allocating transmission resources for the mobile station according to claim 4, characterized in that the message requesting the mobile station to report the measurement report is sent through a common control channel or a packet common control channel. 6. The method for allocating transmission resources for a mobile station according to claim 5, wherein the message requesting the mobile station to report a measurement report includes information indicating uplink radio resource blocks allocated for the mobile station, and the mobile station Report a measurement report through the uplink radio resource block. 7. The method for allocating transmission resources for a mobile station according to claim 1, wherein the packet handover command includes a temporary logical link flag used to indicate flag information of the mobile station. 8. The method for allocating transmission resources for a mobile station according to claim 1, wherein the specific method of constructing the packet handover command is: the current cell allocates radio resources according to the packet handover response message returned by the target cell information and flag information indicating the mobile station to construct a handover command. 9. The method for allocating transmission resources for a mobile station according to claim 1, wherein the specific method of constructing the packet handover command is: the target cell assigns the radio resource information for the mobile station and indicates the mobile station The flag information constructs a handover command, and the flag information indicating the mobile station is notified to the target cell through a handover request message. 10. A device for allocating transmission resources for a mobile station, characterized in that the device comprises: A judging unit, configured to judge whether the current cell has resources to meet the quality of service requirements for downlink data transmission; The selecting unit is configured to select a target cell with resources meeting the quality of service requirements for downlink data transmission to allocate wireless resources for the mobile station when the judgment result of the judging unit is that the current cell has no resources to meet the quality of service requirements for downlink data transmission, and according to the selected The assigned wireless resource constructs a packet switching command and sends it to the control unit; wherein, the target cell allocates downlink transmission resources for the mobile station in a specific way: the current cell sends packet switching carrying information indicated by the quality of service requirement parameter for downlink data transmission A request message, requesting the target cell to allocate downlink transmission resources that meet the quality of service requirements for downlink data transmission for the mobile station; the target cell returns a packet handover response message carrying the radio resource information allocated for the mobile station; The control unit is used to send a packet switching command on the control channel, and notify the mobile station in the idle state to use the radio resource allocated by the target cell to transmit downlink data.

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