KR100908260B1 - Method for transmitting / receiving signal in broadband wireless access system and mobile communication system thereof - Google Patents

Abstract

According to the present invention, when the power of the terminal in the idle mode is turned off (off), it informs the base station explicitly, and deletes the information of the terminal managed in the network, so that the network manages the terminal information more effectively. In addition, the terminal information can be deleted without a separate verification procedure performed by the network, thereby increasing the efficiency of system operation.

In the broadband wireless access system according to the present invention, when operating the terminal in the idle mode, when the power of the terminal is off (off) of the terminal managed by the network entity (entity) that allowed the idle mode of the terminal Characterized in that to release the information.

Idle mode, ranging message

Description

METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN BROADBAND WIRELESS ACCESS SYSTEM AND SYSTEM THEREOF}

1 is a diagram illustrating idle mode signaling according to the present invention when a power of a terminal is turned off.

The present invention relates to a broadband wireless access system, and more particularly, to idle mode terminal information operation of a broadband wireless access system.

The broadband wireless access system supports idle mode in order to minimize power consumption of fixed terminals / mobile terminals (hereinafter, referred to as terminals or terminals). When the UE in the idle mode moves between base stations included in the same paging zone, it is not necessary to perform a handoff procedure. Therefore, the terminal does not need to transmit the uplink information for the handoff procedure, thereby reducing power consumption.

However, when the terminal transitions to the idle mode and the terminal power is turned off due to the exhaustion of the battery or the user's request at some point, the prior art uses a verification procedure performed by the network (base station or paging controller). There is a problem that the information on the terminal maintained in the network can not be deleted without the location registration period, but the terminal does not register the location, etc.). And this problem creates another problem that generates more information than the network needs to manage and performs a separate procedure for managing their validity.

The present invention is to solve the problems described above, the object is,

The present invention provides a method of releasing terminal information of a broadband wireless access system that explicitly informs a base station of a fact that a terminal in idle mode is turned off and deletes information of a corresponding terminal managed in a network.

In order to achieve the above object, a method for transmitting and receiving a signal in a broadband wireless access system according to the present invention,
In a broadband wireless access system,
If a mobile station in idle mode attempts to power off,
Transmitting a ranging request message to a network entity, the ranging request message including a power down indicator indicating power off of the mobile terminal;
In response to the ranging request message, a ranging response message including a power down response parameter indicating whether a power down information update related to the mobile terminal has succeeded or failed; Receiving from an entity.
Preferably, after the mobile terminal receives the ranging response message
Powering off the mobile terminal; characterized in that it further comprises.
Preferably, when the update of the power off information fails, the value of the power down response parameter is 0, and when the update of the power off information is successful, the value of the power down response parameter is 1. .
Preferably, when the update of the power off information is successful, the information related to the mobile terminal is deleted by the network entity.
In addition, in order to achieve the above object, a method for transmitting and receiving a signal in a broadband wireless access system according to the present invention,
In a broadband wireless access system,
Receiving an idle mode request message (DREG-REQ message) from the mobile terminal for switching to the idle mode;
Sending an idle mode response message (DREG_CMD Message) including a paging group ID, a paging period, a paging offset value, and information related to the mobile station maintained by a network entity, to the mobile station;
Receiving a ranging request message from the mobile terminal, the ranging request message including a power down indicator indicating power off of the mobile terminal;
And canceling the mobile terminal related information maintained by the network entity. Preferably, the method further includes transmitting a ranging response message including a power down response parameter to the mobile station.
In addition, in order to achieve the above object, a method for transmitting and receiving a signal in a broadband wireless access system according to the present invention,
A broadband wireless access system, comprising: transmitting a ranging request message to a network entity, the ranging request message including a power down indicator informing of a location update due to power down of the mobile terminal; And receiving a ranging response message from the network entity that includes a response to the location update.
Preferably, the response included in the ranging response message indicates the success of the location update and the failure of the location update.
Preferably, when the location update fails, the response included in the ranging response message is 0, and when the location update succeeds, the response included in the ranging response message is 1.
Preferably, when the location update is successful, the information related to the mobile terminal is released by the paging controller.
Preferably, the idle mode paging management for the mobile terminal is stopped when the power of the mobile terminal is terminated.
Preferably, the network entity is characterized in that the base station or a paging controller.
In addition, in order to achieve the above object, a method for transmitting and receiving a signal in a broadband wireless access system according to the present invention,
10. A broadband wireless access system, comprising: a network entity receiving a ranging request message from a mobile entity, the ranging request message including a power down indicator indicating a location update due to power down of the mobile terminal; And
And sending a ranging response message including the response to the location update to the mobile terminal.
Preferably, the method may further include performing a location update for releasing information associated with the mobile terminal.
Preferably, the response included in the ranging response message indicates the success of the location update and the failure of the location update.
In addition, in order to achieve the above object, the mobile communication system according to the present invention,
At least one mobile terminal; And a ranging request message including a power down indicator for indicating a location update due to power termination of the mobile terminal from the mobile terminal, and receiving a response to the location update. And a network entity for transmitting the ranging response message to the mobile terminal.
Preferably, the mobile terminal,
A ranging request message including a power down indicator for notifying a location update due to power termination of the mobile terminal to the network entity, the ranging request including a response to the location update; Receiving a response message from the network entity.

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The operation of the idle mode is summarized as follows.

Paging Zone: A paging zone is defined as an entire area that is handled by multiple base stations, called paging groups. Base stations included in the same paging zone have the same paging period (Paging_Cycle) and paging offset (Paging_Offset). It is.

The terminal may request the base station to switch to the idle mode, and the base station may switch the terminal to the idle mode state by transmitting a paging-zone ID, a paging period, and a paging offset thereof.

When the terminal switches to the idle mode, the base station delivers a list of information that you want to maintain. In more detail, the base station delivers information to be maintained to the corresponding terminal in the form of a flag when delivering a paging period and a paging offset. The information maintained is managed by the base station that permits the idle mode or by another object, the Paging Controller.

During the idle mode, the terminal may determine whether to continue or exit the idle mode through paging transmitted in the form of a broadcast from the base station at every paging period promised. The terminal performs Location Update when the paging group is changed or when the idle mode timer is terminated.

When the terminal in idle mode intends to transmit traffic, the terminal may exit the idle mode at any time. On the other hand, if there is traffic to be delivered to the terminal in the idle mode, the base station may cause the terminal to terminate the idle mode through paging.

When the terminal in the idle mode does not receive the paging at a predetermined time due to the movement to another paging area or loss of synchronization, the terminal terminates the idle mode.                     

In conclusion, the terminal entering the idle mode can be freely moved in the same paging area without performing the handoff procedure by normally receiving periodic paging unless there is information to be transmitted or transmitted.

Hereinafter, the idle mode switching procedure of the terminal is summarized as follows.

The terminal delivers an idle mode request message to the serving base station in order to switch to the idle mode.

Upon receiving the idle mode request message, the service base station transmits a paging group ID, a paging cycle, and a paging offset value to the terminal by sending the idle mode response message, and releases connection information with the terminal and radio resources allocated to the terminal. .

Table 1 below shows an idle mode request message delivered to the base station by using a conventional deregistration request (DREG-REQ) message.

Syntax Size Notes DREG-REQ Message Format () {   Management Message Type = 49 8 bits   Deregistration Request Code (De-registration_Request_Code) 8 bits 0x00 = SS registration request from BS and network 0x01 = MSS registration cancellation from service base station and initialization request of mobile terminal idle mode 0x02-0xFF = Reserved   TLV encoded parameters variable  }

When the De-registration_Request_Code of the Deregistration Request (DREG-REQ) message is set to 0x01 (Idle mode start request), the information shown in [Table 2] is shown as the TLV (Type length value) of the Deregistration Request (DREG-REQ) message. It is included in the encoding field and delivered to the terminal.                     

Name Type Length Value Paging Cycle Request ? 2 Request cycle in which the paging message is transmitted within the paging group. Idle Mode Retain Information nn One MSS request for Paging Controller retention of network re-entry related MAC management message MSS service and operational information to expedite future Network Re-entry from Idle Mode. For each Bit location, a value of '0' indicates the information for the associated with the specified MAC management messages is not to be retained and managed, a value of '1' indicates the information is requested to be retained and managed Bit # 0 : Retain MSS service and operational information associated with SBC-REQ / RSP MAC management messages Bit # 1: Retain MSS service and operational information associated with PKM-REQ / RSP MAC management messages Bit # 2: Retain MSS service and operational information associated with REG -REQ / RSP MAC management messages Bit # 3: Retain MSS service and operational information associated with Network Address Bit # 4: Retain MSS service and operational information associated with Time of Day Acquisition Bit # 5: Retain MSS service and operational information associated with TFTP MAC management messages Bit # 6: Retain MSS service and operational information associated with Full service (MAC state machines, CS classifier information, etc ...)                                             

Table 3 below is an example of an idle mode response message transmitted from a base station to a terminal, and is shown using a conventional deregistration command (DREG-CMD) message.

Syntax Size Notes DREG-CMD Message Format () { Management Message Type = 29 8 bits Action Code 8 bits TLV encoded parameters variable }

[Table 4] shows the action code of the deregistration command message (DREG-CMD).

Operation code (Action Code) Action 0x00 The SS leaves the current channel and attempts to connect to another channel. 0x01 The SS listens to the current channel but does not transmit until a RES-CMD message or DREG-CMD with a work code is received. 0x02 The SS listens for the current channel but transmits only on Basic Management, Primary Management, and secondary Management connections. 0x03 The SS may return to normal operation and transmit its own active connection. 0x04 SS terminates current normal operation with BS; The BS transmits an operation code in response to the SS DREG-REQ. 0x05 The MSS is requested to cancel the MSS registration from the serving base station and initiates the mobile terminal idle mode. 0x06 Mobile communication retransmits DREG-REQ message after given REQ-duration. 0x07 The mobile terminal waits for the DREG-CMD message without retransmitting the DREG-REQ message. 0x08 ~ 0FF Reserved

When the action code of the deregistration command (DREG-CMD) message is set to 0x05 (idle mode permission), information as shown in [Table 5] is included in the TLV encoding field of the deregistration command message (DREG-CMD). It is delivered to the terminal.

Name Type Length Value Paging Information ? 4 Bits 15: 0-PAGING_CYCLE-Cycle in which the paging message is transmitted within the paging group Bits 23; 16-PAGING OFFSET Determines the frame within the cycle in which the paging message is transmitted. Must be smaller than PAGING CYCLE value Bits 31: 24- Paging-group-ID ID of the paging group the MSS is assigned to REQ-duration ? One Waiting value for the DREG-REQ message re-transmission (measured in frames) Paging Controller ID oo 6 This is a logical network identifier for the Serving BS or other network entity retaining MSS service and operational information and / or administering paging activity for the MSS while in IDLE Mode Idle Mode Retain Information pp One Idle Mode Retain Information is provided as part of this message is indicative only. Network Re-entry from Idle Mode process requirements may change at time of actual reentry. For each Bit location, a value of '0' indicates the information for the associated reentry management messages shall not be retained and managed, a value of '1' indicates the information for the associated re-entry management message shall be retained and managed Bit # 0: Retain MSS service and operational information associated with SBC-REQ / RSP MAC management messages Bit # 1: Retain MSS service and operational information associated with PKM-REQ / RSP MAC management messages Bit # 2: Retain MSS service and operational information associated with REG-REQ / RSP MAC management messages Bit # 3: Retain MSS service and operational information associated with Network Address Bit # 4: Retain MSS service and operational information associated with Time of Day Bit # 5: Retain MSS service and operational information associated with TFTP MAC management messages Bit # 6: Retain MSS service and operational information associated with Full service (MAC state machines, CS classifier information, etc ...)                                             

In addition, the serving base station informs the base stations of the paging group to which the terminal to switch to the idle mode, so as to page the terminal in the same paging period (PAGING_ CYCLE, PAGING OFFSET).

On the other hand, through the idle mode response message, whether the terminal is permitted to switch to the idle mode, whether there is downlink traffic delivered to itself through a paging message in the form of a broadcast delivered from the base station according to the paging period, or whether to perform ranging If not, determine if it should remain idle.

Table 6 below shows a format of a paging message in a broadcast format that the terminal receives from a base station of a paging group at regular intervals.

Syntax Size Notes MOB-PAG-ADV Message Format () { Management Message type = ?? 8 bits Num-Paging Group IDs 8 bits The number of paging group IDs in the message For (i = 0; i <Num-Paging-Group-IDs; i ++) { Paging Group ID 8 bits } For (j = 0; j <Num-MACs; j ++) {                                              The number of the mobile MAC address in the message can be determined from the message length (found in the unique MAC header). MSS MAC address hash                                                                                                24 bits                                              Hash is obtained by calculating CRC24 at mobile terminal 48bit MAC address, and polynomial theorem for calculation is 0x864CFB. Action Code                                                                                                2 bits                                              * Paging action indication to mobile terminal 00 = No action required 01 = Range to establish position and response message 10 = Enter Network 11 = Reserved Reserved 6 bits } }

When the terminal receives the downlink traffic through the paging message, the terminal exits the idle mode and re-registers with the network to receive the downlink data traffic. When the terminal exits the idle mode and re-registers with the network, it re-registers with the network using Ranging.

[Table 7] shows the ranging request (RNG-REQ) message and [Table 8] shows information added to the ranging request message when the terminal exits the idle mode and re-registers with the network (TLV Encoded Information). to be. Upon receiving this information, the base station knows that the terminal performs ranging in order to re-register with the network in idle mode.

Syntax Size Notes RNG-REQ Message Format () { Management Message Type = 4 8 bits Downlink Channel ID 8 bits TLV Encoded Information variable TLV specific }

Name Type Length Value Ho Indication zz One Presence of item in message in combination with other included information elements indicates the MSS is currently attempting to HO or network Re-entry from Idle-Mode to the BS, regardless of value Location Update Request qq One Presence of item in message indicates MSS action of Idle Mode Location Update Process regardless of value Paging Controller ID rr 6 This a logical network network identifier for the serving BS or other network entity retaining MSS service and operational information and / or administering paging activity for the MSS while in Idle Mode

When the terminal exits the idle mode by using ranging and re-registers with the network, the base station (or paging controller) that allows the idle mode for the first time may inform the terminal of the information that is currently maintained to know what procedure can be omitted. Make sure Since the terminal receiving the currently maintained information performs only necessary procedures, network re-registration of the terminal can be performed quickly.

When the terminal is requested to perform ranging through a paging message, the terminal performs the ranging to update the location of the terminal and the terminal list of the valid idle mode. In addition, the terminal performs location update through ranging at a time corresponding to the location update condition, and the messages used at this time are as shown in [Table 7] and [Table 8]. The time corresponding to the location update condition is when the paging area is changed or when the timer expires.

On the other hand, if the terminal is received through the paging message to do nothing, it maintains the idle mode without any action.

If the terminal generates uplink traffic or downlink traffic, or the terminal is transferred to a base station belonging to another paging group and terminates the idle mode, the base station notifies the base stations belonging to the same paging group to notify the base station from the idle mode terminal list. Delete the terminal.

In the present invention, when the power of the terminal in the idle mode is turned off (off), by informing the base station to the fact that the network (the last base station or the paging controller that allowed the idle mode) so that the terminal-related information that was maintained It was.                     

To this end, the present invention uses a ranging request message and a ranging response message. That is, in the present invention, when a terminal in idle mode attempts to power-off, this fact is put in a ranging request message and informs the network (the last base station or paging controller which allowed the idle mode). In addition, the network receiving the ranging request message according to the power-off of the terminal transmits various information to the terminal through the ranging response message.

Table 9 below shows an example of message parameters included in the ranging request message and delivered to the network when the terminal is powered off.

Name Type Length Value Power down indicator nn One Presence of item in message indicates the MSS is currently attempting to switch power off, regardless of value

The message parameters in Table 9 are included in the message in the form of a TLV.

Table 10 below shows an example of message parameters included in the ranging response message and delivered to the terminal when the terminal is powered off.

Name Type Length Value Power down response nn One 0x00 = Failure of Power Down Information Update. 0x01 = Success of Power Down Information Update 0x10, 0x11: Reserved

The message parameters in Table 10 are included in the message in the form of a TLV.

The two messages, that is, the ranging request message and the ranging response message, are used to implement the present invention by way of example. The message parameters of Table 9 and Table 10 may also be applied to other messages. The effect can be obtained.                     

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 is a diagram illustrating idle mode signaling according to the present invention when the power of the terminal is off (off), when the power of the terminal in the idle mode is off (off) It indicates the flow of signals transmitted between the last base station or paging controller.

Referring to Figure 1, the idle mode signaling procedure according to the present invention will be described.

First, the MSS sends the idle mode request message in the form of [Table 5] session information (terminal capability, authentication information, IP address information, information necessary for network service, etc.) of the terminal that the base station wants to maintain. On (DREG-REQ), the idle mode is requested to the base station BS1 (S10).

The base station BS1 receiving the idle mode request message informs the base stations having the same paging group ID through the backbone so that the MSS can be added to the paging group. The base station BS1 may inform all base stations in the same area.

If there is a paging controller in the network, the base station BS1 may inform the paging controller of the idle mode request of the terminal and the paging controller may inform the base stations in the same area. In some cases, the base station BS1 notifies only the paging controller of the idle mode request of the terminal and notifies the base stations within the same paging area so that the paging controller sends a paging message.

The base station BS1 transfers session information of the terminal to be maintained in the idle mode response message DREG-CMD to the terminal MSS, and delivers paging information such as a paging period, a paging offset, and a paging ID together. (S30) The terminal MSS also receives a paging message in a broadcast form from the base station BS1 according to a predetermined period.

Then, when the terminal moves to the base station BS2 of the same paging group (S50), the terminal receives a paging message from the base station BS2 at the same paging period and paging offset (S60).

Then, when the terminal is powered off due to the exhaustion of the battery or the user's request at some point in time, the terminal sends a ranging request message to a message parameter (eg, a power down indicator) indicating the power off. In step S70, the base station BS2 powers off the terminal to the base station BS1 (the last base station or paging controller which allowed the idle mode of the terminal). off) informs the fact or requests for information release to delete or release the information of the corresponding terminal managed by the base station BS1 (S80).

Alternatively, the base station receiving the power off may transmit a message to the end of the idle mode of the terminal to the network entity holding the information related to the fixed / mobile terminal.

The network entity may be a paging controller.                     

When the base station BS2 informs the terminal that information of the terminal has been deleted (or failed to delete) through the range response message, the terminal terminates power. (S90) Depending on the situation, the terminal may terminate power without receiving this message.

In addition, the present invention can also receive and process the information indicating the end of power in the base station itself allowed the effective mode in the state that the terminal does not move in FIG.

Through the above procedure, when the traffic to the terminal is turned off in the broadband wireless access system according to the present invention, the power of the receiving terminal is turned off to the sender of the traffic. You can be notified immediately.

As described above, according to the present invention, when the power of the terminal in the idle mode is turned off, the network is informed to the base station explicitly, and the information of the terminal managed in the network is deleted. The terminal information is managed, and the terminal information can be deleted without a separate verification procedure performed by the network, thereby increasing the efficiency of system operation.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (14)

In a broadband wireless access system, If a mobile station in idle mode attempts to power off, Transmitting a ranging request message to a network entity, the ranging request message including a power down indicator indicating power off of the mobile terminal; In response to the ranging request message, a ranging response message including a power down response parameter indicating whether a power down information update related to the mobile terminal has succeeded or failed; Receiving from an entity; Method of transmitting and receiving a signal in a broadband wireless access system comprising a. The method of claim 1, After the mobile terminal receives the ranging response message Powering off the mobile terminal; and transmitting and receiving a signal in a broadband wireless access system, further comprising. The method of claim 1, When the update of the power off information fails, the value of the power down response parameter is 0, And upon successful update of the power off information, a value of the power down response parameter is 1. The method of claim 1, And if the updating of the power-off information is successful, information related to the mobile terminal is deleted by the network entity. delete The method of claim 1, wherein the network entity is A method for transmitting and receiving signals in a broadband wireless access system, characterized in that the base station or a paging controller. In a broadband wireless access system, Receiving an idle mode request message (DREG-REQ message) from the mobile terminal for switching to the idle mode; Sending an idle mode response message (DREG_CMD Message) including a paging group ID, a paging period, a paging offset value, and information related to the mobile station maintained by a network entity, to the mobile station; Receiving a ranging request message from the mobile terminal, the ranging request message including a power down indicator indicating power off of the mobile terminal; And canceling the mobile terminal related information maintained by the network entity. The method of claim 7, wherein And transmitting a ranging response message including a power down response parameter to the mobile station. 9. The method of claim 8, wherein the power down response parameter is And transmitting or receiving a signal in a broadband wireless access system, wherein the updating of power off information related to the mobile terminal is successful or failed. The method of claim 9, When the update of the power off information fails, the value of the power down response parameter is 0, And upon successful update of the power off information, the value of the power down response parameter is 1. delete delete delete delete

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