KR20060045287A - Base station and subscriber station for efficiently setting service flow in wireless access communication system and method therefor - Google Patents

Abstract

In a wireless access communication system according to the present invention, a base station performs a predetermined timer after one provisioned service flow addition (DSA) transaction is completed during a network entry process for communicating with a predetermined terminal on the wireless access communication network. Set and send a DSA message to the terminal based on this timer.

Service Flow, DSA

Description

 Base station and subscriber station for efficiently setting service flow in wireless access communication system and method therefor}             

1 is a block diagram illustrating a general broadband wireless access communication system;

2 is a diagram illustrating a DSA message flow initiated by a terminal;

3 is a view showing the configuration of a base station according to the present invention;

4 is a diagram illustrating a message flow between a base station and a terminal according to an embodiment of the present invention;

5 is a diagram illustrating a message flow between a base station and a terminal according to another embodiment of the present invention;

6 illustrates a QoS parameter set type field in a DSA_REQ message according to an embodiment of the present invention.

7 illustrates a QoS parameter set type field in a DSA_REQ message according to another embodiment of the present invention.

8 is a diagram illustrating a message flow between a base station and a terminal according to another embodiment of the present invention;                 

9 is a view showing a feature of a provisioned QoS Advertise Timer according to an embodiment of the present invention;

10 is a block diagram illustrating a terminal according to an embodiment of the present invention.

The present invention relates to a base station, a terminal, and a method for efficient service flow setting in a wireless access communication system.

1 is a diagram illustrating a configuration of a general broadband wireless access communication system. Referring to FIG. 1, each mobile subscriber station (MSS) 10, 12 is generally mobile and is connected to a backbone network 30 through a base station (BS) 20, 22, respectively. The terminals 10 and 12 allow access between the base stations 20 and 22 and the subscribers. Base stations 20 and 22 provide control, management, and connectivity to terminals 10 and 12. The backbone network 30 is connected to an authentication and service authorization server (ASA) 40 for authentication and service authentication of the terminals 10 and 12. In the wireless access communication system configured as described above, the terminal 10 needs to successfully complete a network entry process with a predetermined base station 20 in order to communicate on a network.

On the other hand, the service flow is set between the terminal and the base station in a wireless access communication system. The service flow refers to a unidirectional flow of data (SDU) delivered through a connection that guarantees a specific QoS. There are three main types of this service flow. The first provisioned is to set the service flow property and grant only the service flow identifier (SFID). SFID (service flow identifier) is a 32-bit ID assigned to the service flow by the base station. The second Admitted is a state in which resources are reserved but not actually active, and a 16 bit CID (Connection Identifier) identifying a connection is allocated by a base station. Finally, Active is using the actual resources.

The terminal receives a Service Flow Addition (DSA) message from the base station at the end of initialization. Since the DSA message has a provisioned QoS parameter set, the terminal can set service flows that can be serviced from the base station. In 802.16, there are four types of service types: Unsolicited Grant Services (UGS), Real-Time Polling Services (rtPS), Non-Real-Time Polling Services (nrtPS), and Best Effort (BE) Services. In the initialization process, the base station may provide provision to the terminal for all of these service types or only some of them. After setting the provisioned service type, the MAC of the terminal completes initialization and enters a normal operation mode.

 Since one DSA message transaction can only set QoS of one unidirectional service flow, the base station should send a DSA_REQ message as many as the number of services to be provisioned. However, there is no proposed method for informing the terminal of how many service flows the base station intends to provision or when the last provisioning is performed. Therefore, it is difficult for the terminal to determine when to complete the initialization and transition to the normal mode.

The UE may set a service type by sending a DSA message having an active QoS parameter set to a base station during a normal operation during a service type not provisioned in the initialization process. That is, after the terminal enters the normal mode, the terminal may request a service flow other than the currently set service flow. However, when the terminal requests a service flow, the process of requesting and allocating a bandwidth for transmitting a DSA message to the base station must be performed. Therefore, more radio resources are used and processing time becomes longer. In addition, since the QoS of the service flow is finally determined by the base station that knows whether the terminal can be serviced, if the terminal first requests a service flow, the base station may not need to accept the QoS parameter requested by the terminal and perform DSA negotiation again. high.

2 is a diagram illustrating a DSA message flow initiated by a terminal. Referring to FIG. 2, the terminal SS transmits a service flow addition (DSA) REQ message to the base station in step 111. When the base station receives the DSA_REQ message, the base station transmits a DSA_RVD message indicating that the DSA_REQ message from the terminal has been normally received to the terminal. Subsequently, the base station transmits a DSA-RSP message including provisioning service flow information to the terminal in step 115. Subsequently, when the UE receives the DSA-RSP message from the base station, the base station receives a DSA-ACK message indicating whether the DSA-RSP message is normally received in step 117 and whether the QoS parameters received by the DSA-RSP can be accommodated. To send.

As such, if the proper service flow is not set during the initialization process of the base station and the terminal, the terminal requests the base station to set the service flow, and the process is not only complicated but also wastes radio resources.

Accordingly, an object of the present invention is to provide a method and a base station for efficiently setting a service flow between a terminal and a base station in a broadband wireless access communication system.

To this end, embodiments of the present invention allow the base station to inform the terminal of the number of service flows to be provisioned or the time of the last provisioning service flow or to specify in a predetermined message.

Specifically, a base station in a wireless access communication system according to an embodiment of the present invention transmits a message including last provisioning service flow time information during a network entry process for communicating with a predetermined terminal on the wireless access communication network. Create and send to the terminal. In addition, a base station in a wireless access communication system according to another embodiment of the present invention generates a message including last provisioning service flow timing information during a network entry process for communicating with a predetermined terminal on the wireless access communication network. To the terminal.

In a wireless access communication system according to another embodiment of the present invention, the base station may define a timer so that the terminal does not wait for a predetermined time for a provisioned DSA message after one provisioned DSA transaction ends. Send the next provisioned DSA message based on that. Alternatively, the base station may define a timer to regulate the overall time to perform provisioning regardless of the number of provisioned messages or in relation to the number of provisioned.

In another embodiment of the present invention, the terminal may immediately enter the normal mode when at least one provisioned DSA transaction is completed. Alternatively, the terminal may set a random time when at least one provisioned DSA transaction is completed and may enter a normal mode if the DSA message is not received from the base station until the time is exceeded. Alternatively, the terminal may define, for example, a time for performing the entire provision with reference to the number of provisioned messages received from the base station, and may enter the normal mode when this time is exceeded.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

3 is a diagram illustrating a configuration of a base station according to the present invention. Referring to FIG. 3, the base station includes a message generator 60 and a transceiver 62. The message generator 60 inserts information on the number of service flows to be provisioned or information on the last provisioning service flow time point in a message transmitted to the terminal. In this case, the message used may be any message transmitted to the terminal during the existing network entry process.

According to an embodiment of the present invention, when the message generating unit 60 receives a registration request message REG-REQ from a terminal, a provisioning service flow field is provided in a registration response message (REQ-RES). add a service flow field). This provisioning service flow field is an agreement or specification of how many service flows the base station will provision upon initialization. Alternatively, the message generating unit 60 receives the capability request message (SBC (SS Basic Capability) -REQ) from the terminal in a capability negotiation stage during the initialization process, and then responds to the response message (SBC-RSP). Adds a provisioning service flow field This provisioning service flow field includes information on the number of service flows to be provisioned.

In addition, according to another embodiment of the present invention, the message generator 60 adds a provisioning service flow state field to the DSA message. According to the present embodiment, the provisioning service flow status field may have a size of 1 bit, and the present invention is not limited thereto. If the value of the provisioning service flow state field is 0, it means continue state. This continue state indicates that provisioning has not been completed yet, and there will be another DSA transaction after that. If the value of the provisioning service flow state field is 1, it means that it is a Done state. Done state indicates the last provisioning DSA transaction and the terminal enters normal operation after this transaction is completed. Those skilled in the art will appreciate that the value of this provisioning service flow status field can be changed.

Meanwhile, according to another exemplary embodiment of the present invention, the message generator 60 modifies a predetermined field of the DSA_REQ message / RSP message. In more detail, a QoS parameter set type field exists in a DSA_REQ / RSP message. Another embodiment of the present invention relates to provisioning service flow to continue with bit 3 allocated as a reserve in the QoS parameter set type field of a DSA_REQ / RSP message. Used to indicate if it is the last one. Of course, other reserved bits may be used.

In one example, the reserve bit of the QoS parameter set type field is used as a continued provisioning set to indicate that the provisioning service flow continues. Of course, the continued provisioning set may indicate whether the current provisioning service flow is last.

In another example, the reserve bits of the QoS parameter set type field indicate the last provisioning set to indicate whether the provisioning service flow is the last provisioning service flow. Used as                     

In addition, the base station according to another embodiment of the present invention may include timer means (not shown) for setting a predetermined timer after the end of one provisioned DSA transaction. Specifically, when the terminal waits for a service flow to be provisioned from the base station, the base station may transmit the provisioned DSA message too late to the terminal, but the terminal may not wait for the provisioned DSA message indefinitely. Accordingly, the base station defines a timer so that the terminal does not wait for the provisioned DSA message for a predetermined time and sends the next provisioned DSA message based on the timer. This timer is called a provisioned QoS Advertise Timer.

Alternatively, the base station may define a timer for regulating the total time for performing a given provision regardless of the number of provisioned messages or with reference to the provisioned number. In addition, by using a provisioned QoS Advertise Timer for one provision and a total time timer, a provisioned QoS Advertise Timer is satisfied, but it is possible to prevent the case where the entire time timer is not satisfied.

 Hereinafter, a message flow between a base station and a terminal according to embodiments of the present invention will be described. 4 is a diagram illustrating a message flow between a base station and a terminal according to an embodiment of the present invention. The terminal SS transmits a registration request message in step 201. In this case, according to the present invention, the terminal adds a provisioning service flow field to the registration request message REG-REQ in step 201. The terminal requests the number of service flows to provision to the base station. When the base station receives the registration request message REG-REQ message including the provisioning service flow field, it determines the number of service flows to provision. The base station inserts a provisioning service flow field into the number of service flows to be provisioned, and transmits a registration response message including the provisioning service flow field to the terminal. The Provisioning Service Flow field is the negotiated or specified how many service flows the base station will provision. When the terminal receives the registration response message including the provisioning service flow field, the terminal may know how many service flows the base station will provision with reference to the provisioning service flow field. Accordingly, the terminal may perform a count every time it receives the provisioning service flow from the base station to know when the provision of the provisioning service flow is completed. In step 203, the base station transmits a response message (REG-RSP) to the terminal.

Alternatively, the base station and the terminal may negotiate the number of provisioning service flows through the SBC-REQ message and the SBC-RSP message in the terminal capability negotiation step.

5 is a diagram illustrating a message flow between a base station and a terminal according to another embodiment of the present invention. FIG. 5 is a diagram illustrating a step in which a base station transmits a service flow addition (DSA) message to a user equipment at the end of initialization.

First, the base station BS transmits a Service Flow Addition (DSA) -REQ message including a provisioning service flow state field to the UE in step 221. This DSA-REQ message contains of course provisioning service flow information. That is, the base station provides the terminal with information about a service flow that can be provided to the terminal through a DSA-REQ message. The provisioning service flow state field included in the DSA-REQ message has a value indicating whether the base station has completed provisioning of the service flow.

That is, the base station determines whether the current service provisioned service flow is the last provisioned service or whether there is a service flow to be provisioned after the current provisioned service flow. flow state field). For example, if the value of the provisioning service flow state field is 0, it means that it is continue state. This continue state indicates that provisioning has not yet finished, which means that there will be another DSA transaction after that. If the value of the provisioning service flow state field is 1, it means that it is a Done state. Done state indicates the last provisioning DSA transaction and the terminal enters normal operation after this transaction is completed.

Upon receiving the DSA-REQ message, the UE transmits the DSA-RSP message as a response message to the DSA-REQ in step 223. Subsequently, the base station transmits a DSA-ACK message indicating that the DSA-RSP message from the terminal has been normally received in step 225 to the terminal.

Alternatively, the base station modifies certain fields of the DSA_REQ message. In more detail, a QoS parameter set type field exists in the DSA_REQ message. In another embodiment of the present invention, bit 3 allocated as a reserve in the QoS parameter set type field of the DSA_REQ message may be assigned to a last provisioned set or continue. Use as a Provisioned Set. Of course, other reserved bits may be used. This Last Provisioned Set bit or Continued Provisioned Set bit is used to notify the UE that current provisioning is the last step of provisioning.

6 illustrates a QoS parameter set type field in a DSA_REQ message according to an embodiment of the present invention. As shown in FIG. 6, bit 3 allocated as a reserve is used as the last provisioned set value. For example, when the last provisioned set value is 0, it means that it is a Done state, and when the last provisioned set value is 1, it means that it is continue stat. The UE sees the QoS parameter set type field of the received DSA_REQ message from the base station, recognizes that the Done state is the last provisioning DSA transaction, and enters normal operation after the transaction is completed.

7 illustrates a QoS parameter set type field in a DSA_REQ message according to another embodiment of the present invention. As shown in FIG. 7, bit 3 allocated as a reserve is used as a Continued Provisioned Set value. For example, a continued provision set value of 1 indicates that provisioning has not yet finished and there will be another DSA transaction afterwards. If the provisioned set value is 0, it indicates that it is the last provisioned DSA transaction.

When the UE sees the continuously provisioned set of the QoS parameter set type field of the received DSA_REQ message from the base station and indicates that the value is the last provisioned DSA transaction, the terminal enters normal operation after the transaction is completed.

On the other hand, all of the values indicating the last provisioning service flow time point described above, for example, the value of the provisioning service flow status field, the continued provisioned set value, and the last provisioned set value are changeable by those skilled in the art. The present invention is not limited to the specific size or value.

8 is a diagram illustrating a message flow between a base station and a terminal according to another embodiment of the present invention, and FIG. 9 is a diagram illustrating a feature of a provisioned QoS Advertise Timer according to an embodiment of the present invention. In FIG. 8, although two provisioned DSA transactions 310 and 320 are performed between the terminal and the base station, the number of DSA transactions is not limited thereto. This embodiment defines the time interval between these provisioned DSA transactions 310,320, or defines the time of the entire provisioning processor.

First, the base station BS transmits a service flow addition (DSA) -REQ message including provisioning service flow information to the terminal in step 312. The Service Flow Addition (DSA) -REQ message may include a provisioning service flow state field according to the above-described embodiment of the present invention. The provisioning service flow status field may have a value indicating whether the base station has completed provisioning of the service flow. As such, another embodiment of the present invention may be implemented by integrating at least one other embodiment.

Referring back to FIG. 8, when the UE receives the DSA-REQ message, the UE transmits the DSA-RSP message as a response message to the DSA-REQ in step 314. Subsequently, the base station transmits to the terminal a DSA-ACK message indicating that the DSA-RSP message is normally received from the terminal in step 316. As such, the first provisioned DSA transaction 310 is performed between the base station and the terminal.

At this time, according to an embodiment, the base station configures a provisioned QoS Advertise Timer such that the UE does not wait for a provisioned DSA message for a predetermined time or more. Specifically, the base station sets the provisioned QoS Advertise Timer so as not to exceed a predetermined time until the next provisioned DSA message is sent. When the base station defines such a provisioned QoS Advertise Timer, this timer becomes a system minimum requirement, so the base station transmits the next DSA message to the terminal within the time defined by this timer.

The characteristics of such a provisioned QoS Advertise Timer are described in FIG. As shown in FIG. 9, the provisioned QoS Advertise Timer is defined in the base station and may have a minimum value, a default value, and a maximum value. If the remaining service provisioning has not yet finished, the base station should transmit the next provisioned DSA message to the terminal within the time interval set by this timer.

Accordingly, in step 322, the base station transmits a DSA-REQ message to the terminal. At the end of the previous provisioned DSA transaction, that is, when the DSA-ACK message transmitted to the terminal is transmitted, a start time of a new provisioned DSA transaction is performed. That is, the time interval between the time points at which a new DSA-REQ message is transmitted to the terminal does not exceed the time interval defined by the provisioned QoS Advertise Timer. If a new DSA-REQ message is not received within this time interval, the terminal may enter a normal mode and may first start a new provisioned service flow transaction.

As in the first provisioned DSA transaction 310, upon receiving the DSA-REQ message, the terminal transmits the DSA-RSP message as a response message to the DSA-REQ in step 324. Subsequently, the base station transmits a DSA-ACK message to the terminal indicating that the DSA-RSP message is normally received from the terminal in step 326. As a result, the second provisioned DSA transaction 320 is completed. Alternatively, the base station defines a timer to regulate the overall time to perform provisioning regardless of or in proportion to the number of provisioned messages. Specifically, the base station defines a time interval for the provisioning process with the terminal, and allows all DSA transactions to be performed with the terminal within this time.

Meanwhile, according to another embodiment of the present invention, the terminal may be configured to have a timer for the provisioning process.

10 is a block diagram of a terminal according to an embodiment of the present invention.

Referring to FIG. 10, the terminal includes a transceiver 401, a controller 420, and a timer 430. The transceiver 410 transmits and receives a message for a provisioned DSA transaction with the base station. The transceiver 410 receives a DSA-REQ message from the base station during a provisioned DSA transaction initiated by the base station. The transceiver 410 transmits a DSA-REQ message to the base station during the provisioned DSA transaction initiated by the terminal. The timer unit 430 sets a predetermined time in relation to the provisioning process according to an embodiment of the present invention.

The terminal may be configured to enter a normal mode as soon as at least one provisioned DSA transaction is completed. In this case, the controller 420 enters a normal mode when at least one provisioned DSA transaction with the base station is completed. The terminal enters the normal mode through the service flow provided from the base station and receives the remaining provisioned DSA message in the normal mode. When the terminal entering the normal mode does not receive a provisioned service flow from the base station within a predetermined time, the terminal may first transmit a DSA message to the base station to initiate a provisioned DSA transaction.

Alternatively, the terminal may set an arbitrary time when at least one provisioned DSA transaction is completed and enter the normal mode when the time is exceeded. In this case, the timer unit 430 sets a predetermined time when the current provisioned DSA transaction is completed. The controller 420 enters a normal mode when the DSA message is not received from the base station for a time determined by the timer.

Alternatively, the terminal may define, for example, a time for performing the entire provision with reference to the number of provisioned messages received from the base station, and may enter the normal mode when this time is exceeded. In this case, the timer unit 430 sets a time for the provision process with the base station. The controller 420 enters a normal mode when the set time is exceeded. If the base station does not transmit the provisioned service flow to the terminal within the time defined by the timer, the terminal may first transmit a DSA message to the base station in the normal mode.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

According to the present invention as described above, the following benefits can be obtained by clarifying the completion point of provisioning. Since the first terminal does not know whether the service provisioning is completed, it does not transition to the normal operation state and prevents a delay in the service initialization process. Second, despite the fact that the service provisioning process is not completed, the UE that does not recognize this prevents unnecessary message transmission / retransmission, bandwidth waste, and signaling delay caused by the SS-initiated-DSA process.

Claims (15)

A base station in a wireless access communication system, A timer for setting a predetermined timer after one provisioned service flow addition (DSA) transaction is finished during a network entry process for communicating with a predetermined terminal on the wireless access communication network; And a transmitter for transmitting the DSA message to the terminal based on the timer. The base station according to claim 1, wherein the transmitter transmits the DSA message to the terminal within a time interval set by the timer. The base station of claim 1, wherein the terminal defines a time for performing provisioning and enters a normal mode when the time is exceeded. The base station according to claim 1, wherein the terminal enters a normal mode immediately after completing at least one provisioned DSA transaction or sets a random time and enters a normal mode when the time is exceeded. The base station of claim 1, wherein the terminal defines a time for performing a full provisioning and enters a normal mode when the time is exceeded. A base station in a wireless access communication system, Setting a predetermined timer after one provisioned Service Flow Addition (DSA) transaction is completed during a network entry process for communicating with a predetermined terminal on the wireless access communication network; And transmitting a DSA message to the terminal based on the timer. The method of claim 6, wherein the transmitting step comprises transmitting the DSA message to the terminal within a time interval set by the timer. A base station in a wireless access communication system, A timer for setting a time for performing full provisioning during a network entry process for communicating with a predetermined terminal on the wireless access communication network; And a transmitter for transmitting the DSA message to the terminal based on the timer. A terminal in a wireless access communication system, A timer for setting a predetermined timer after one provisioned Service Flow Addition (DSA) transaction is completed during a network entry process for communicating with a predetermined base station on the wireless access communication network; And a controller for entering a normal mode based on the timer. 10. The terminal of claim 9, wherein the controller enters a normal mode if the DSA message is not received from the base station until the timer expires. The terminal of claim 9, further comprising a transceiver for transmitting and receiving a message for a provisioned DSA transaction with the base station to the base station. 12. The terminal of claim 11, wherein the transceiver receives a provisioned DSA message remaining from the base station after entering a normal mode. The terminal of claim 11, wherein the transceiver transmits a DSA request (DSA-REQ) message in a normal mode. A terminal in a wireless access communication system, A timer for setting a time for performing full provisioning during a network entry process for communicating with a predetermined base station on the wireless access communication network; And a controller for entering a normal mode based on the timer. 15. The terminal of claim 14, wherein the controller enters a normal mode when a time exceeded by the timer.

Images