KR101057058B1 - Idle mode execution method applied to broadband wireless access system - Google Patents

Abstract

The present invention relates to a method of performing an idle mode applied to a broadband wireless access system, wherein all mobile stations in an idle mode in a paging area need to remain in an idle mode. If it is determined whether the mobile station exists in the idle mode in the paging area needs to maintain the idle mode, a paging advertisement message (MOB-PAG-ADV) is omitted. The present invention relates to a method of performing idle mode, which includes a step of broadcasting, and to reduce the size of a message for providing information on whether the idle mode is maintained, to utilize downlink radio resources more efficiently, and to idle state. There is an effect that can minimize the power for message processing in the mobile station.

Broadband Wireless Access System, Idle Mode, Paging Advertising Message

Description

Method for performing idle mode applied to broadband wireless access system {Method for Performing Idle Mode in Broadband Wireless Access System}

1 is a diagram illustrating an embodiment of a paging group.

2 is a diagram illustrating an embodiment of a broadband wireless access system having a paging controller.

3 is an embodiment configuration diagram illustrating a paging group consisting of a plurality of base stations.

4 is a flowchart of a first embodiment showing a method of performing an idle mode according to the present invention;

5 is a flowchart of a second embodiment showing a method of performing an idle mode according to the present invention;

6 is a flowchart for explaining a second embodiment of the present invention in more detail.

7 is a flowchart of a third embodiment showing a method of performing an idle mode according to the present invention;

8 is a flowchart of a fourth embodiment showing a method of performing an idle mode according to the present invention;

9 is a flowchart for explaining a fourth embodiment of the present invention in more detail.

10 is a flowchart of a fifth embodiment showing a method of performing idle mode according to the present invention;

11 is a flowchart illustrating a procedure in which a MAC hash skip limit parameter is used in a location update process performed when a mobile station moves to another paging group after the idle mode is changed.

The present invention relates to a method for performing idle mode applied to a broadband wireless access system, and more particularly, to a message required for a mobile subscriber station (MSS) to perform an idle mode. The present invention relates to a method for more efficiently performing idle mode by reducing the size of information included.

The broadband wireless access system supports idle mode to reduce power consumption of the mobile station. In idle mode, even if the mobile station is not registered with a specific base station (BS), even if the mobile station does not perform handover during the inter-base station movement in a paging zone including a plurality of base station areas, the mobile station does not perform paging (MOB_PAG). Receiving -ADV) messages allows periodic checks for the presence of downlink traffic destined for it, thereby minimizing mobile station power consumption.

The operation of the idle mode can be summarized as follows. A paging area is defined as an entire area that is covered by base stations included in a set of a plurality of base stations called paging groups. Base stations included in the same paging group have the same value of paging period (Paging_Cycle) and paging offset (Paging_Offset).

The mobile station can request the base station to switch to idle mode, and the base station can transfer its paging group ID, the corresponding paging period and paging offset, to switch to the idle mode state. At this time, the mobile station and the base station operate a timer for location update of the idle mode mobile station.

During idle mode, it is possible for the mobile station to determine whether to remain in idle mode, terminate or perform a location update procedure through a paging advertisement message (MOB-PAG-ADV) delivered in broadcast form from a base station every paging period promised. Do. When there is an upstream traffic that a mobile station in idle mode has to transmit, it is possible for the mobile station to exit idle mode at any time.

When downlink traffic to be delivered to the mobile station in the idle mode occurs, the base station may cause the mobile station to exit the idle mode through a paging advertisement message (MOB-PAG-ADV). If the mobile station in the idle mode fails to receive the paging advertisement message (MOB-PAG-ADV) at a predetermined time due to loss of synchronization, the mobile station should exit the idle mode.

The location update procedure is performed by updating an invalid parameter through a network re-registration procedure when the mobile station in idle mode has moved to another paging group or the timer for location update has expired. At this time, the mobile station can quickly perform the location update procedure by omitting the procedure that can be omitted, in accordance with the administrator information held by the base station.

The present invention provides a method for more efficiently utilizing downlink radio resources and minimizing power for message processing in an idle mobile station by reducing the size of a message for providing information on whether the idle mode is maintained. The purpose is to provide.

In order to achieve the above object, the present invention provides a method for performing idle mode applied to a broadband wireless access system, wherein all mobile stations in idle mode in a paging area are idle. Checking whether it is necessary to maintain the mode state, and if the result of the check indicates that all mobile stations existing in the idle mode in the paging area need to maintain the idle mode, a paging advertisement message without the paging parameter (MOB) Broadcasting (PAG-ADV) is achieved.

The above-mentioned objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an embodiment of a paging group. As shown in FIG. 1, at least one base station may form a paging group. Base stations belonging to the same paging group transmit and receive information necessary to provide an idle mode through a backbone message. Meanwhile, information required for providing an idle mode may be transmitted and received between base stations belonging to different paging groups through a backbone message.

2 is a diagram illustrating an embodiment of a broadband wireless access system having a paging controller. Referring to FIG. 2, the paging controller transmits and receives information necessary for idle mode support with base stations belonging to at least one paging group, thereby performing idle mode control for a terminal in each base station region through the base station. That is, transmission and reception of information necessary for providing an idle mode may be performed between the base stations through the paging controller. The paging controller may be provided in a specific base station or may be provided separately from the base station.

Table 1 shows an example of a paging-group-action for configuring a paging area. The inter-base station message may be transmitted between base stations over the wire.

Field Size Notes Paging-group-action Message Format () { Message Type 8-bits Sender BS-ID 48-bit Base station unique identifier (Same number as that broadcasted on the DL-MAP message) Target BS-ID 48-bit Base station unique identifier (Same number as that broadcasted on the DL-MAP message) Time stamp 32-bit Number of millisecond since midnight GMT (set to 0xffffffff on the DL-MAP message) Action 4-bit 0-Assign target BS to paging groups
1-Remove target BS from paging groups
2-Query (which paging groups target BS belongs to?)
3-Information (Paging groups sender BS belongs to) Num record 4-bit Number of paging group-ID records Field Size Notes For (j = 0; j <Num Record; j ++) {   Paging-group-ID 16-bit Paging-group-ID   PAGING_CYCLE 16-bit Cycle in which the paging message in trnasmitted within the paging group   PAGING_OFFSET 8-bit MSS PAGING OFFSET parameter   } Security field TBD A mean to authenticate this message CRC field 32-bit IEEE CRC-32  }

The inter-base station message may be used for the following four purposes according to a combination of action bits. That is, a target BS can be designated as a specific paging group (Action = 0), a receiving base station can be excluded from a specific paging group (Action = 1), and a receiving base station belongs to any paging group. You can ask if it is (Action = 2). Meanwhile, the transmitting base station (Sender BS) may inform which paging group it belongs to (Action = 3).

Since one base station may belong to one or more paging areas, the paging-group-action may include information on a plurality of paging groups. Through the paging-group-action, base stations can know the paging period and paging offset used in each paging area. Meanwhile, base stations can be dynamically allocated to a paging group.

3 is a diagram illustrating an embodiment of a paging group including a plurality of base stations. As shown in FIG. 3, a plurality of base stations (BSs) supporting idle mode belong to a paging group to configure a paging area.

Table 2 is an example of a deregistration request message (DREG_REQ) used by the mobile station to switch to idle mode.

Syntax Size Notes DREG-REQ_Message_Format () {   Management Message Type = 29 8 bits 0x00 = MSS de-registration request from BS and network
0x01 = request for MSS deregistration
from Serving BS invitation of MSS
paging Availability Mode
0x02-0xFF = reserved   De-registration Request Code 8 bits Only valid if De-Registration Request Code = 0x01   Paging Cycle Request 16 bits   TLV encoded parameter variable  }

The mobile station may request that the mobile station switch to the idle mode by setting the de-registration request code of the deregistration request message DREG_REQ to 0x01 and transmitting it to the base station. At this time, the administrator information of the mobile station which the base station desires to maintain after switching to the preferred paging period and idle mode can be transmitted to the base station.

Table 3 shows an example of TLV encoded parameters for the deregistration request message DREG_REQ.

  Name Type Length Value Paging Cycle Request 2 Requested cycle in which the paging message is transmitted within the paging group. Idle Mode Retain Information MSS request for Paging Controller retention of network re-entry related MAC management message MSSS service and operational information to expedite future Network Re-entry from Idle Mode. For each Bit location, a value of '0' indicates the information associated with the specified MAC management message is not requested to be retained 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 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 with Full service (MAC state
machines, CS classifier information,
etc ..)

The base station receiving the deregistration request message DREG_REQ may respond to a request of the mobile station through a deregistration command message DREG_CMD.

Table 4 shows an example of a deregistration command message (DREG_CMD).

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

The base station allows the transition to the idle mode through the action code of the deregistration command (DREG_CMD) message (Action Code = 0x05), or requests the transition to the idle mode again after a certain time (Action Code = 0x06), it can be no longer requested to switch to idle mode until it sends a deregistration command message (Action Code = 0x07).

Table 5 shows an example of an operation code of the deregistration command message (DREG_CMD).

Action code Action 0x00 MSS shall immediately terminate service with BS and attempt network entry at another BS 0x01 MSS shall listen to the current BS but shall not transmit until an RES-CMD message or DREG_CMD with Action Code 0x00 is received 0x02 MSS shall listen to the current BS but only transmit on the Basic, Primary Management and Secondary Management Connections. 0x03 MSS shall return to normal operation and may transmit on any of its active connections. 0x04 MSSS shall terminate current Normal Operation with the BS; the BS shall transmit this action code only in response to any MSS DREG-REQ 0x05 required MSS de-registration from Serving BS and request initiation of MSS Idle Mode 0x06 The MSS may retransmit the DREG-REQ message after the time duration (REQ-duration) provided in the message 0x07 The MSS shall not retransmit the DREG-REQ message and shall wait the DREG-CMD message 0x08-0xFF Reserved

Through a TLV (Type Length Value) item that can optionally be included in the Deregistration Command message (DREG_CMD), the Paging Group ID, Paging_Cycle, and Paging Offset (Paging Group ID) that the mobile station must maintain during idle mode Paging_Offset) value can be passed. Table 6 shows an example of the TLV parameters included in the deregistration command message DREG_CMD.

Name Type Length Value Paging Information 4 Bits 15: 0-PAGING_CYCLE-Cycle in which thepaging 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 retransmission (measured in frames) Paging Controller ID 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 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.)

As described above, the deregistration command message DREG_CMD includes paging information as a TLV parameter, manager member information of the mobile station maintained by the base station after the mobile station switches to idle mode, and a paging controller identifier. Information retained by the base station when the mobile station transitions to idle mode is omitted in the network registration procedure if the idle mode mobile station exits idle mode or performs a location update procedure in the future. This is to enable fast network registration and location update of the mobile station.

Table 7 shows an example of a paging advertisement message (MOB-PAG-ADV).

Syntax Size Notes MOB_PAG-ADV_Message_Format () {   Management Message Type = 62 8bits   Num_Paging Group IDs 8bits Number of Paging Group IDs in this message   For (i = 0; i <Num_Paging_Group_IDs; i ++) {     Paging Group ID 8bits    }   For (j = 0; j <Num_MACs; j ++) { Number of MSS MAC Addresses in message can be determined from the length of the message (found in the generic     MSS MAC Address hash 24bits     Action code 2 bits Paging action instruction to MSS
00 = No Action Required
01 = Performing Ranging to establish location and acknowledge message
10 = Enter Network
11 = reserved     Reserved 6bits    }   TLV Encoded Information variable TLV specific   reserved variable Padding bits to ensure octet aligned   }

The mobile station may maintain the idle mode or terminate the idle mode by receiving the paging advertisement message (MOB-PAG-ADV) at a paging offset at a predetermined paging period. The mobile station in the idle mode determines whether to end the idle mode, perform a location update procedure, or maintain the idle mode by receiving a paging advertisement message (MOB-PAG-ADV) periodically transmitted from the base station.

Base stations belonging to one paging group direct the operation of all idle mode mobile stations in the paging group, via the same paging advertisement message (MOB-PAG-ADV). In this case, a medium access control (MAC) address hash having a length of 24 bits may be used as an identifier for identifying each mobile station. The idle mode mobile stations determine whether the paging group has been changed through the paging group ID parameter setting value of the paging advertisement message (MOB-PAG-ADV), and the identifier of the mobile station in the paging advertisement message (MOB-PAG-ADV). For example, a MAC address hash can be found to check that idle mode is operating normally within a paging group.

If the idle mode mobile station receives a paging advertisement message (MOB-PAG-ADV) and does not find the identifier (MAC address hash) of the mobile station in the paging advertisement message (MOB-PAG-ADV), there is a problem with idle mode operation. It can be determined that it is present and exit the idle mode. All base stations in the paging group, even if the mobile station performs a location update procedure or does not perform a network registration procedure to receive downlink traffic, provide the mobile station's identifier (MAC address hash) with the paging advertisement message (MOB-PAG-ADV). ) And send it.

That is, all base stations supporting idle mode belong to the same paging group.

The identifiers (MAC address hashes) of all idle mode mobile stations should be included in the paging advertisement message (MOB-PAG-ADV) and transmitted in the form of broadcasting for each paging cycle. Therefore, as the number of mobile stations switching to the idle mode increases, the size of the paging advertisement message (MOB-PAG-ADV) that the base stations belonging to the corresponding paging group periodically transmit increases proportionally. On the other hand, as the downlink band required for transmitting this increases, it is difficult for the base stations to efficiently use radio resources. In addition, the processing power for the idle mode mobile station to receive and decode the paging advertisement message (MOB-PAG-ADV) increases in proportion to the size of the paging advertisement message (MOB-PAG-ADV).

Therefore, when the base station instructs the mobile station to maintain the idle mode through the paging advertisement message (MOB-PAG-ADV), it is possible to omit the identifier (MAC address hash) of the mobile station, the paging advertisement message (MOB-PAG-ADV) Size), minimize the waste of radio resources, and enable the mobile station to update the availability of idle mode operation.

Hereinafter, three embodiments for omitting the paging parameter in the paging advertisement message (MOB-PAG-ADV) will be described. The paging parameter includes an identifier (MAC address hash) of the mobile station and a corresponding operation code and TLV parameter.

As a first embodiment, the type of paging advertisement message (MOB-PAG-ADV) is defined, and the paging parameter for the idle mode mobile station is omitted or omitted depending on the message type. In this case, the paging parameter may be omitted only when the paging advertisement message (MOB-PAG-ADV) instructs all idle mode mobile stations to maintain the idle mode.

As a second embodiment, when the mobile station switches to the idle mode, the base station may transmit the number of times that the paging parameter can be omitted in the paging advertisement message (MOB-PAG-ADV) to the mobile station by including in the deregistration command message DREG_CMD. .

As a third embodiment, a method of using a specific flag indicating that a paging parameter for maintaining an idle mode is omitted in a paging advertisement message (MOB-PAG-ADV). In this case, paging parameters corresponding to all mobile stations are not omitted in the paging advertisement message (MOB-PAG-ADV), but paging parameters corresponding to mobile stations instructing to maintain the idle mode are omitted. Paging parameters for the mobile station instructing to perform the procedure may be included. As a fourth embodiment, if the mobile station in idle mode has not received its identifier (MAC address hash) from the paging advertisement message (MOB-PAG-ADV) for a certain number of consecutive times, to update the validity of the idle mode operation, Perform the location update procedure. In this case, the base station may transmit the number of times to the mobile station through the deregistration command message (DREG-CMD) when the mobile station switches to the idle mode, and the base stations in the paging group transmit the paging parameter within the number of paging advertisement messages (MOB). -PAG-ADV) allows the mobile station to update the validity of idle mode operation without performing a separate location update procedure. The number of times the identifier of the mobile station can be omitted in the paging advertisement message delivered by the base station can be managed and updated by the base station or the paging controller.

Table 8 shows an example of the paging advertisement message (MOB-PAG-ADV) according to the first embodiment of the present invention.

Syntax Size Notes MOB_PAG-ADV_Message_Format () {   Management Message Type = 62 8bits   Num_Paging_Group_IDs 8bits Number of Paging Group IDs in this message   For (i = 0; i <Num_Paging_Group_IDs; i ++) {     Paging Group ID 8bits    }   Paging Type 1 bit 0: Normal type
1: Compressed type   If (Paging Type == 0) {     Num_MACs 15 bits     For (j = 0; j <Num_MACs; j ++) {       MSS MAC Address hash 24bits The hash is obtained by computing a CRC 24 on the MSS 48-bit MAC address. The polynomial for the calculation is 0x864CFB       Action code 2 bits Paging action instruction to MSS
00 = No Action Required
01 = Perform Ranging to establish location and acknowledge message
10 = Enter Network
11 = reserved     Reserved 6bits       }     }   else {   reserved 7bits   }   TLV encoded Information variable TLV specific   reserved variable Padding bits to ensure octet aligned   }   else {    reserved 7bits Padding bits to ensure octet aligned     }    }

Table 9 shows an example of parameters included in the deregistration command message DREG-CMD according to the second embodiment of the present invention. As shown in Table 9, a parameter indicating the number of times the identifier of the mobile station is omitted may be included in the deregistration command message (DREG-CMD).

Name Type Length Value Number of skipping MAC Address hash One Number of skipping MSS MAC address hash in the MOB_PAG-ADV message when the value of action code associated with the MSS is 0 (No Action). The unit is the number of MOB_PAG-ADV transmission.

Table 10 shows an example of parameters included in the deregistration command message DREG-CMD according to the second embodiment of the present invention.

Name Type Length Value Interval including MAC Address hash One Indicates per which number of MOB_PAG-ADV transmission the BS should include MSS MAC address hash in the MOB_PAG-ADV message when the value of action code associated with the MSS is 0 (No Action).

As shown in Table 10, a parameter indicating the interval in which the identifier of the mobile station is included may be included in the deregistration command message (DREG-CMD).

In the second embodiment, a page for periodically instructing operation of an idle mode mobile station.

The advertising advertisement message (MOB-PAG-ADV) may use the same as the paging advertisement message (MOB-PAG-ADV) in the prior art. However, the base station according to the deregistration command message (DREG_CMD) allows the mobile station to switch to the idle mode, and according to the number of times that the mobile station identifier can be omitted, the mobile station must continuously maintain the idle mode, the paging advertisement message (MOB) -PAG-ADV) may regularly omit the identifier of the mobile station.

In addition, when the idle mode mobile station is instructed to maintain the idle mode during the paging period, since the identifier of the mobile station is omitted regularly, it is determined that there is no problem in the idle mode operation even if its identifier is not included. According to the number of times that the mobile station identifier can be omitted, the validity of the idle mode operation is updated through its identifier periodically transmitted to the paging advertisement message (MOB-PAG-ADV).

If the mobile station fails to receive its identifier from the paging advertisement message (MOB-PAG-ADV) so that the number of mobile station identifiers can be omitted because the synchronization between the base station paging advertisement message (MOB-PAG-ADV) is not correct. It can work as follows: That is, if a paging advertisement message (MOB-PAG-ADV) is received for a certain number of times, but the identifier of the mobile station is not received from the paging advertisement message (MOB-PAG-ADV), there is a problem in idle mode operation. If so, the network registration procedure or location update procedure is performed. The predetermined number of times may be a value obtained by doubling the parameter setting value shown in Table 10 or by adding 1 to the parameter setting value shown in Table 9 and then doubling the value.

Table 11 shows an example of a paging advertisement message (MOB-PAG-ADV) according to the third embodiment.

Syntax Size Notes MOB_PAG-ADV_Message_Format () { Management Message Type = 62 8 bits Num_Paging_Group_IDs 8 bits Number of Paging Group IDs in this message For (i = 0; i <Num_Paging_Group_IDs; i ++) { Paging Group ID 8bits } Omit MSS MAC Address hash 1 bit 0: No omission of MSS MAC Address hash
1: Omission of MSS MAC Address hash which value of Action code is 0. Num_MACs 15 bits Number of MSS MAC addresses For (j = 0; j <Num_MACs; j ++) { MSS MAC Address hash 24bits The hash is obtained by computing a CRC24 on the MSS 48-bit MAC address. The polynomial for the calculation is 0x864CFB Action code 2 bits Paging action instruction to MSS
00 = No Action Required
01 = Perform Ranging to establish location and acknowledge message
10 = Enter Network
11 = reserved Reserved 6 bits } TLV Encoded Information variable TLV specific Reserved variable Padding bits to ensure octet aligned }

In the third embodiment, even if there is a mobile station that needs to perform a location update and network registration procedure by indicating whether a mobile station requiring idle mode maintenance has been omitted from the paging advertisement message (MOB-PAG-ADV) through a flag. Reduce paging advertisement messages (MOB-PAG-ADV).

However, in the first and third embodiments, paging advertisements including identifiers of all mobile stations, even if the mobile station maintains the idle mode continuously while delivering a plurality of paging advertisement messages (MOB-PAG-ADV). Message (MOB-PAG-ADV) (in the present invention, the paging type value of the first embodiment is set to 0, or the 'Omit MSS MAC Address hash' value is set to 0 in the third embodiment). Proper delivery should allow idle mode mobile stations to update the operational validity of the idle mode.

Table 12 shows an example of parameters included in the deregistration request message (DREG-REQ) and deregistration command message (DREG-CMD) according to the fourth embodiment of the present invention.

Name Type Length Value MAC Hash Skip Threshold
One Maximum number of skipping MSS MAC address hash in the MOB_PAG-ADV message successively in case the MSS shall maintain Idle Mode (i.e. Action code is 0, 'No Action Required'). The unit is the number of MOB_PAG-ADV transmission.

As shown in Table 12, a parameter indicating the maximum number of times a paging parameter can be omitted from a paging advertisement message may be included in the deregistration request message (DREG-REQ) and a deregistration command message (DREG-CMD). In addition, when the mobile station moves to another paging group, the ranging request (RNG-REQ) message and the ranging response (RNG-) in the process of performing ranging for location update with a base station or a paging controller belonging to a new paging group. The parameter may be included in the RSP) message.

The value set in Table 12 may be used as the maximum number of times that a base station can omit the mobile station identifier of a particular mobile station consecutively from the paging advertisement message (MOB-PAG-ADV), and the mobile station has exceeded the number of times. When receiving the paging advertisement message (MOB-PAG-ADV) that does not include the mobile station identifier can be used as a reference to perform the location update procedure.

If the base station intends to always omit the identifier of the mobile station from the paging advertisement message only when the mobile station maintains the idle mode through the operation code of the paging advertisement message, the parameter setting value of the parameter as shown in Table 12 is 0xFF. It can be set and delivered to the mobile station via a deregistration command message (DREG-CMD). When the mobile station receives the parameter shown in Table 12 set to 0xFF through the deregistration command message (DREG-CMD) and receives a paging advertisement message from the base station that does not include its mobile station identifier in the future, the mobile station idles until the next paging period. May be instructed to maintain. In addition, if the mobile station does not receive the parameters shown in Table 12 through the deregistration command message (DREG-CMD), the mobile station may assume that its identifier may be omitted in the paging advertisement message transmitted from the base station in the future. have.

In the fourth embodiment, the mobile station entering the idle mode is included in the deregistration request message (DREG-REQ) as shown in Table 12 to request the maximum number of times that the identifier of the mobile station can be omitted consecutively in the paging advertisement message. In this case, the base station determines the maximum number of times that the mobile station identifier can be omitted from the paging advertisement message (MOB-PAG-ADV) to the mobile station that switches to the idle mode through the deregistration command message (DREG-CMD), as shown in Table 12. Inform. Also, even if the deregistration request message (DREG-REQ) is received, which does not include the maximum skip count parameter of the mobile station identifier, the base station indicates the maximum skip count of the mobile station identifier as shown in Table 12 in the deregistration command message (DREG-CMD). It can be delivered to the mobile station by including. The maximum number of possible skips of the mobile station identifier may be managed by the base station or the paging controller, and base stations in the same paging group are set in Table 12 (paging advertisement message omitting the mobile station identifier (MOB-PAG-ADV)). The mobile station identifier may be continuously omitted from the paging advertisement message (MOB-PAG-ADV) within the maximum number of times that can be transmitted).

That is, the base stations in the same paging group may set and use a parameter (shown in Table 12) regarding the maximum number of times of transmission of the paging advertisement message (MOB-PAG-ADV) omitting the paging parameter to the same value. When the base station transmits the paging advertisement message (MOB-PAG-ADV), the paging parameter corresponding to the mobile station is set in Table 12 (paging advertisement message without paging parameter) in the paging advertisement message (MOB-PAG-ADV). (MOB-PAG-ADV) must be included at least one before. In addition, when the mobile station receives the paging advertisement message (MOB-PAG-ADV) including its mobile station identifier after switching the idle mode, the mobile station updates the validity of the idle mode operation without a separate operation, and the paging advertisement does not include the mobile station identifier. If the message (MOB-PAG-ADV) is continuously received more than the number set in Table 12, the location update procedure may be performed in the base station or the paging controller to update the validity of the idle mode operation.

In the present invention, when the base station omits the identifier of the mobile station operating in the idle mode from the paging advertisement message (MOB-PAG-ADV), the operation code of the corresponding mobile station indicates 'No Action', that is, to maintain the idle mode. It applies only to, and therefore, the operation code of the mobile station transmitted through the paging advertisement message (MOB-PAG-ADV) in the operation description of the present invention will be described for the case of instructing to maintain the idle mode.

4 is a flowchart of a first embodiment showing a method of performing an idle mode according to the present invention. Referring to FIG. 4, the mobile station requests the base station to switch to the idle mode through the deregistration command message DREG_CMD (S401). The base station allows the mobile station to switch the idle mode through the deregistration command message (S402).

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S403). In this case, when the paging advertisement message (MOB-PAG-ADV) includes the identifier (MAC address hash) of the mobile station (for example, the paging advertisement message (MOB-PAG-ADV) includes the MAC address hash of the mobile station). Type (Normal type), the operation according to the operation code of the paging advertisement message (MOB-PAG-ADV) (Idle mode maintenance or location update procedure or network registration). In this case, the mobile station itself receives the identifier (MAC address hash) and checks that it is operating normally in the idle mode. In this case, when the mobile station identifier is not received from the paging advertisement message (MOB-PAG-ADV), the validity of the operation of the idle mode may be updated by performing a network registration or location update procedure with the base station.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S404). If the paging advertisement message (MOB-PAG-ADV) does not include the mobile station's identifier (MAC address hash) (for example, the paging advertisement message (MOB-PAG-ADV) type contains the MAC address hash that is the identifier of the mobile station) In the case of a compressed type), an operation code indicating that the idle mode is to be maintained is regarded as being received. In this case, since the identifier (MAC address hash) has not been received, the validity of the idle state cannot be updated.

5 is a flowchart of a second embodiment showing a method of performing an idle mode according to the present invention. Referring to FIG. 5, the mobile station requests the base station to switch to the idle mode through the deregistration request message DREG_REQ (S501). The base station receiving the deregistration request message DREG_REQ allows the mobile station to switch the idle mode through the deregistration command message DREG_CMD (S502). At this time, the base station transmits to the mobile station the number of idle mode identifiers that can be commonly applied in the paging group (the value in the operation description of the present invention is 2).

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S503). The validity of the idle mode operation is updated by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station through the paging advertisement message (MOB-PAG-ADV).

The base station determines whether to omit the identifier (MAC address hash) of the mobile station required to maintain the idle mode in the paging advertisement message (MOB-PAG-ADV) for each paging period by applying the number of times that the mobile station identifier can be omitted. When the mobile station identifier is omitted, the number of times that the mobile station identifier can be omitted is reduced by one.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S504). If the mobile station does not receive its identifier (MAC address hash) through the paging advertisement message (MOB-PAG-ADV), it considers the same as receiving the operation code instructing to maintain the idle mode and sets the idle mode. Keep it up. However, the mobile station checks whether there is a problem in idle mode operation based on the number of times that the mobile station identifier can be omitted from the base station when switching to the idle mode.

Paging advertisement message for a period of time exceeding the number of times that the mobile station identifier can be skipped and the idle mode operation can be determined to be invalid (in the present invention, an example of doubling the number of times that the mobile station identifier can be omitted is given by doubling the value). If it does not receive its mobile station identifier from the (MOB-PAG-ADV), it performs a network registration or location update procedure with the base station, thereby updating the validity of the operation in the idle mode.

If the base station is required to maintain the idle mode, and the number of times that the mobile station identifier can be omitted is 1 or more, the base station may omit the mobile station identifier (MAC address hash) from the paging advertisement message (MOB-PAG-ADV) and omit the mobile station identifier. Decreases the number by 1. The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S505).

If the paging advertisement message (MOB-PAG-ADV) does not receive its identifier (MAC address hash), it considers the same as receiving the operation code instructing to maintain the idle mode and maintains the idle mode. However, the mobile station checks whether there is a problem in the idle mode operation based on the number of times that the mobile station identifier can be omitted from the base station when switching to the idle mode. If the mobile station identifier is exceeded the number of times it can be skipped and the mobile station identifier has not been received from the paging advertisement message (MOB-PAG-ADV) for a period of time in which idle mode operation can be determined to be invalid, the network registration or location update procedure is performed. By updating the validity of the operation in the idle mode.

When the base station is required to maintain the idle mode and the mobile station identifier can be omitted, the base station transmits the mobile station's identifier and an operation code for instructing the idle mode to be transmitted to the paging advertisement message (MOB-PAG-ADV). (S506). At this time, the base station updates the number of times that the mobile station identifier can be omitted for the mobile station. The mobile station updates the validity of the idle mode operation by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station included in the paging advertisement message (MOB-PAG-ADV).

When the base station instructs the ranging to perform the location update and the validity update of the mobile station through the paging advertisement message (MOB-PAG-ADV), and the mobile station performs ranging according to the command, the base station and the mobile station are the mobile station identifier of the mobile station identifier. The number of omissions can be updated.

6 is a flowchart for explaining a second embodiment of the present invention in more detail. FIG. 4 shows an operation in the case of not receiving its identifier in the paging message to exceed the number of times that the mobile station identifier can be skipped due to the mobile station's inter-base station movement in the second embodiment of the present invention.

 The mobile station requests the first base station to switch to the idle mode through the deregistration request message DREG_REQ (S601). The first base station permits the mobile station to switch the idle mode through the deregistration command message DREG_CMD (S602). At this time, the number of times of skipping idle mode identifiers commonly applied in the first base station paging group (the value in the operation description of the present invention is 2) is transmitted to the mobile station.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the first base station according to the determined paging period (S603). The mobile station updates the validity of the idle mode operation by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station included in the paging advertisement message (MOB-PAG-ADV).

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the first base station in accordance with a predetermined paging period (S604). When the mobile station does not receive its identifier (MAC address hash) through the paging advertisement message (MOB-PAG-ADV), the mobile station regards the idle mode as the same as receiving the operation code for instructing to maintain the idle mode. Keep it up.

When the mobile station moves to the second base station, it acquires downlink frame synchronization with the second base station and receives a paging advertisement message (MOB-PAG-ADV) according to the paging period and paging offset (S605). If the mobile station does not receive its identifier (MAC address hash) in the paging advertisement message (MOB-PAG-ADV), it considers the same as receiving the operation code instructing to maintain the idle mode and maintains the idle mode. .

If the transmission synchronization of the paging advertisement message (MOB-PAG-ADV) does not match between the base stations, the timings at which the skippable number of mobile station identifiers between the base stations are updated may not match (S606). Therefore, despite the time at which the mobile station's identifier should be included in the paging advertisement message (MOB-PAG-ADV), the identifier of the mobile station is not included in the paging advertisement message (MOB-PAG-ADV) due to the change of the base station. Can be.

In this case, the mobile station checks whether the time at which the idle mode operation can be determined to be invalid (in this embodiment, doubled the number of times the mobile station identifier can be omitted plus 1). As a result, unless it is determined that the idle mode operation is not valid, the operation code instructing to maintain the idle mode is regarded as being received and the idle mode is maintained. If the idle mode mobile station fails to receive its mobile station identifier through the paging advertisement message (MOB-PAG-ADV) during the period when the idle mode operation is determined to be invalid, the network registration or location update procedure is performed. This updates the validity of the operation in the idle mode.

When the idle mode is required, and the number of times that the mobile station identifier can be omitted is 0, the second base station includes an operation code for instructing to maintain the idle mode and the identifier of the mobile station in the paging advertisement message (MOB-PAG-ADV). To transmit (S607). At this time, the second base station updates the number of times that the mobile station identifier can be omitted for the mobile station. The mobile station updates the validity of the idle mode operation by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station included in the paging advertisement message (MOB-PAG-ADV).

The third embodiment of the present invention is to maintain the idle mode in the paging advertisement message (MOB-PAG-ADV)

In addition to the indicating mobile station, even if the mobile station instructing to perform the location update and network registration procedures is included, the identifier of the idle mode maintaining mobile station can be omitted.

7 is a flowchart illustrating a third embodiment of a method for performing idle mode according to the present invention. Referring to FIG. 5, the mobile station requests the base station to switch to the idle mode through the deregistration request message DREG_REQ (S701). The base station permits the mobile station to switch the idle mode through the deregistration command message DREG_CMD (S702). The mobile station, which has been switched to the idle mode, receives a paging advertisement message (MOB-PAG-ADV) from the base station according to a predetermined paging period (S703).

At this time, if the paging advertisement message (MOB-PAG-ADV) includes all the identifiers (MAC address hash) of the mobile station, the idle mode or the position according to the operation code of the paging advertisement message (MOB-PAG-ADV) Perform the update procedure or perform network registration. On the other hand, it receives its identifier (MAC address hash) and checks that it is operating normally in idle mode. Here, whether the paging advertisement message MOB-PAG-ADV includes all of the identifiers of the mobile station may be indicated by using a specific flag of the paging advertisement message MOB-PAG-ADV.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station according to the determined paging period (S704). At this time, through the specific flag included in the paging advertisement message (MOB-PAG-ADV) is received information that omits the identifier of the mobile station is required to maintain the idle mode in the paging advertisement message (MOB-PAG-ADV), the paging advertisement If the message (MOB-PAG-ADV) does not contain an identifier (MAC address hash) of the mobile station which is required to remain in idle mode, the mobile station may assign its identifier (MAC address) via the paging advertisement message (MOB-PAG-ADV). (Hash) is not received, the same as receiving the operation code to instruct to maintain the idle mode. In this case, since the identifier (MAC address hash) has not been received, the validity of the idle state cannot be updated.

If the mobile station does not receive its mobile station identifier from the paging advertisement message despite receiving the paging advertisement message (MOB_PAG-ADV) set to include all mobile station identifiers, the network registration or location update procedure is performed by the base station. The validity of the idle mode operation can be updated.

8 is a flowchart of a fourth embodiment showing a method of performing an idle mode according to the present invention. This embodiment describes a case where the base station manages the maximum number of skips of the mobile station identifier.

Referring to FIG. 8, the mobile station requests the base station to switch to the idle mode through the deregistration request message (DREG_REQ), where the maximum number of times of transmission of the paging advertisement message (MOB-PAG-ADV) omitting the mobile station identifier is determined. The base station receiving the deregistration request message DREG_REQ allows the mobile station to switch the idle mode through the deregistration command message DREG_CMD (S802). At this time, the deregistration command message (DREG_CMD) is the information about the maximum number of times that the number of possible transmission of the paging advertisement message (MOB-PAG-ADV) omitting the mobile station identifier (the value in the operation description of the present invention is 3). Include. In addition, even if the base station receives the deregistration request message (DREG-REQ) that does not include the maximum skip count parameter of the mobile station identifier, the base station does not exceed the maximum number of times that the mobile station identifier omits the paging advertisement message (MOB-PAG-ADV). The information may be included in the deregistration command message (DREG-CMD). The maximum skip count parameter of the mobile station identifier may be managed by a base station or a paging controller in one paging group, and the maximum number of transmissions of the paging advertisement message (MOB-PAG-ADV) omitting the mobile station identifier is a paging group It is applied in common.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S803). The validity of the idle mode operation is updated by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station received in the paging advertisement message (MOB-PAG-ADV).

The base station may omit the identifier (MAC address hash) of the mobile station for which the idle mode is required in the paging advertisement message (MOB-PAG-ADV) for each paging period by applying the maximum number of skipping of the mobile station identifier.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S804). If the mobile station does not receive its identifier (MAC address hash) through the paging advertisement message (MOB-PAG-ADV), it is regarded as having received the operation code instructing to maintain the idle mode. However, the mobile station checks whether there is a problem in idle mode operation based on the maximum number of skips of the mobile station identifier received from the base station when switching to the idle mode. If the number of times it has not continuously received its mobile station identifier from the paging advertisement message (MOB-PAG-ADV) does not exceed the maximum skippable number of mobile station identifiers, the mobile station remains in idle mode.

When the base station is required to maintain the idle mode and continuously omits the mobile station identifier from the paging advertisement message within the maximum number of skipping of the mobile station identifier of the mobile station, the mobile station identifier (MOB-PAG-ADV) corresponds to the identifier of the mobile station (MOB-PAG-ADV). MAC address hash) can be omitted. The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S805).

If the paging advertisement message (MOB-PAG-ADV) does not receive its identifier (MAC address hash), it considers the same as receiving the operation code instructing to maintain the idle mode and maintains the idle mode. However, the mobile station checks whether there is a problem in idle mode operation based on the maximum number of skips of the mobile station identifier received from the base station when switching to the idle mode. If the number of times it has not continuously received its mobile station identifier from the paging advertisement message (MOB-PAG-ADV) does not exceed the maximum skippable number of mobile station identifiers, the mobile station remains in idle mode.

The base station transmits the mobile station identifier including the operation code for indicating the mobile station identifier and the idle mode to the paging advertisement message (MOB-PAG-ADV) within the maximum number of possible skipping of the mobile station identifier for the mobile station requiring idle mode maintenance. S806). At this time, the base station or the paging controller updates the maximum number of skips of the mobile station identifier for the mobile station. The mobile station updates the validity of the idle mode operation by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station included in the paging advertisement message (MOB-PAG-ADV).

When the base station instructs the ranging to update the location and validity of the mobile station through the paging advertisement message (MOB-PAG-ADV), and the mobile station performs ranging according to the command, the base station or the paging controller and the mobile station The number of omissions of the mobile station identifier can be updated.

9 is a flowchart for explaining a fourth embodiment of the present invention in more detail. 9 is a paging advertisement message in which a mobile station identifier omits a mobile station identifier in excess of the maximum number of times that the mobile station can transmit a paging advertisement message (MOB-PAG-ADV) in which the mobile station identifier is omitted in the fourth embodiment of the present invention. Shows the operation in the case of -ADV).

 The mobile station requests the base station to switch to the idle mode through the deregistration request message DREG_REQ (S901). The base station allows the mobile station to switch the idle mode through the deregistration command message DREG_CMD (S902). At this time, the base station transmits to the mobile station the number of idle mode identifiers that can be commonly applied in the paging group (the value in the operation description of the present invention is 3).

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station according to the determined paging period (S903). The mobile station updates the validity of the idle mode operation by checking that the mobile station is normally operating in the idle mode through the identifier of the mobile station included in the paging advertisement message (MOB-PAG-ADV).

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S904 to S906). If the mobile station does not receive its identifier (MAC address hash) through the paging advertisement message (MOB-PAG-ADV), it considers the same as receiving the operation code instructing to maintain the idle mode. However, the mobile station checks whether there is a problem in idle mode operation based on the maximum number of skips of the mobile station identifier received from the base station when switching to the idle mode. If the number of times it has not continuously received its mobile station identifier from the paging advertisement message (MOB-PAG-ADV) does not exceed the maximum skippable number of mobile station identifiers, the mobile station remains in idle mode.

The mobile station receives a paging advertisement message (MOB-PAG-ADV) from the base station in accordance with a predetermined paging period (S907). If the mobile station does not receive its identifier (MAC address hash) in the paging advertisement message (MOB-PAG-ADV), it is compared with the maximum number of skips of the mobile station identifier. If the identifier of the mobile station is not continuously received in the paging advertisement message because the maximum number of skipping of the mobile station identifier is exceeded, it may be determined that the idle mode operation is invalid. At this time, the mobile station can update the validity of the idle mode operation by performing a location update procedure to the base station or the paging controller. The mobile station requests ranging from the base station to perform the location update procedure (S908). Upon receiving the ranging request from the mobile station, the base station updates the location of the mobile station and transmits a ranging response to update the validity of the idle mode operation (S909).

10 is a flowchart of a fifth embodiment showing a method of performing idle mode according to the present invention. In the present embodiment, the case where the paging controller manages the maximum number of skips of the mobile station identifier will be described.

Referring to FIG. 10, the mobile station requests the base station to switch to idle mode through a deregistration request message DREG_REQ. At this time, the deregistration request message may include the maximum skip count (hereinafter referred to as MAC hash skip limit value parameter) of the mobile station identifier as shown in Table 12 (S1001). The base station receiving the deregistration request message transmits an idle mode information request message (Idle-Info-REQ) informing of the idle mode switch request of the mobile station (S1002).

Table 13 shows an example of an idle mode information request message (Idle-Info-REQ).

Field Size Notes Idle-Info-REQ message format () { Global Message Heade r 12 bits   For (i = 0; i <Num Records; i ++) {   MSS MAC Address 48 bits   Action code 4 bits 0000: Idle Mode Initiation Request
0001: DL Traffic has arrived to MSS
0010: MSS session information
0011: MSS re-entry complete
0100: MSS has transitioned to another paging group
0101: Location Update requested
0101-1111: reserved   reserved 4 bits  TLV encoded information variable  Security field TBD A means to authenticate this message }

As shown in Table 13, the idle mode information request message may include the MAC address of the mobile station requesting to switch to the idle mode and the MAC Hash skip limit value TLV as shown in Table 12 received from the mobile station.

Upon receiving the idle mode information request message, the paging controller transmits an idle mode information response (Idle-Info-RSP) message to the base station which has transmitted the idle mode information request message (S1003).

Table 14 shows an example of an idle mode information response (Idle-Info-RSP) message.

Field Size Notes Idle-Info-RSP message format ()  Global Message Header 152 bits  For (i = 0; i <Num Records; i ++)  MSS MAC Address 48 bits  Action code 4 bits 0000: MSS enters Idle Mode
0001: MSS exits Idle Mode
0010: MSS session information
0011: Deliver DL Traffic to Current Attachment BS
0100: Location Update Success
0101: Location Update Failure
0110-1111: reserved  reserved 4 bits  TLV encoded information Variable  Security field TBD A means to authenticate this message  }

As shown in Table 14, the idle mode information response (Idle-Info-RSP) message includes the MAC address of the mobile station transitioning to the idle mode and the MAC hash skip limit value TLV shown in Table 12. Value is 4). In addition, the paging controller may transmit an idle mode information response message (Idle-Info-RSP) including the MAC hash skip limit value parameter to the base station even when the idle mode information request message including the MAC hash skip limit value parameter is received. have.

Upon receiving the idle mode information response message, the base station instructs the mobile station which has requested the idle mode switch to the idle mode switch through the deregistration command message DREG-CMD (S1004). In this case, the deregistration command message includes a MAC hash skip limit value TLV together with paging information TLV such as paging period and paging offset, paging group ID, paging controller ID TLV, and idle mode maintenance information TLV. Include.

The paging controller transmits a paging-announce message to base stations belonging to the same paging group as the base station that allows the mobile station to switch to idle mode at a predetermined paging period (S1005). The paging controller allows the base station to transmit a paging advertisement message (MOB-PAG-ADV) including information instructing the mobile station to perform a specific operation in a next paging interval through the paging notification message. Can be.

At this time, the mobile station to maintain the idle mode by applying the MAC hash skip limit value to inform the base station whether the MAC hash address is included in the paging advertisement message transmitted to the mobile stations. That is, for a mobile station that omits the MAC address from the paging advertisement message, the paging controller does not include the MAC address and operation code of the mobile station in the paging notification message, and instructs the paging advertisement message to include the MAC address of the mobile station in the paging advertisement message. The MAC message and the action code (No action Required) of the mobile station are included in the notification message and transmitted to the base stations in the paging group. If the MAC address of the mobile station is omitted in the paging notification message, the paging controller counts the number of MAC hashes skipped for the mobile station, and updates (resets) the value of the MAC hash skipped number when the MAC address of the mobile station is included.

Table 15 shows an example of a paging notification message.

Field Size Notes Paging-announce message format ()  Global Message Header 152 bits  For (i = 0; i <Num Records; i ++) {   MSS MAC Address 48 bits   Action code 4 bits 0000: MSS shall be paged to re-enter network
0001: MSS shall be paged to perform ranging
0010: MSS needs no action required
0011-1111: reserved   reserved 4 bits  } Security field TBD A means to authenticate this message }

Upon receiving the paging notification message from the paging controller, the base station delivers a paging advertisement message (MOB-PAG-ADV) to the mobile station at a predetermined paging period. When receiving the MAC address hash, the mobile station determines that the mobile station is normally operating in the idle mode, updates the validity of the idle mode operation, and updates (resets) the MAC hash skip limit value (S1006).

The paging controller may omit the MAC address and the operation code of the mobile station to the paging notification message within the number of times not exceeding the MAC hash skip limit value and transmit the same to the base stations (S1007). At this time, the number of times the MAC hash is omitted for the mobile station omitting the omitted MAC address is counted.

The base station transmits a paging advertisement message in a broadcast form by including a MAC address and an operation code of a corresponding mobile station including a MAC address and an operation code in a paging notification message received from a paging controller when a predetermined paging period arrives. The mobile station receives the paging advertisement message according to a predetermined paging period, and if the paging advertisement message does not include its MAC address, it is considered to be the same as receiving the operation code instructing to maintain the idle mode. However, the mobile station checks whether there is a problem in idle mode operation based on the MAC hash skip limit value received from the base station when switching to the idle mode. If the number of times that the mobile station identifier has not been continuously received from the paging advertisement message (MOB-PAG-ADV) does not exceed the MAC hash skip limit value, the mobile station maintains the idle mode (S1008).

The paging controller may transfer the paging notification message to the base station by omitting the MAC address and the operation code of the mobile station within the MAC hash skip limit value (S1009), and the base station receiving the paging is set based on the paging notification message according to the paging period. Delivers advertising messages in broadcast form. Further, if the number of times that the mobile station has not continuously received its mobile station identifier from the paging advertisement message (MOB-PAG-ADV) does not exceed the MAC hash skip limit value, the mobile station maintains the idle mode (S1010).

The paging controller transmits a paging notification message including a MAC address and an operation code (No Action Required) of the mobile station which must maintain the idle mode to update the MAC hash skip limit value, and initializes the MAC hash skip count ( S1011).

The base station delivers the paging advertisement message set based on the paging notification message in a broadcast form in accordance with the paging period, and when the mobile station receives its mobile station identifier (MAC address) from the paging advertisement message, it determines that the mobile station is operating normally in the idle mode. In operation S1012, the validity of the idle mode operation is updated and the MAC hash skip limit value is updated (reset).

If the mobile station does not continuously receive its identifier (MAC address) in the paging advertisement message exceeding the MAC hash skip limit value, it may be determined that the idle mode operation is invalid. At this time, the mobile station can update the validity of the operation of the idle mode by performing the location update procedure to the paging controller through the ranging procedure. The mobile station requests ranging to the base station to perform the location update procedure, and includes a paging controller identifier and an indicator parameter indicating the location update.

Upon receiving the ranging request message for location update, the base station transmits an idle mode information request message including the MAC address and location update operation code of the mobile station to the paging controller, and the paging controller performs location update for the mobile station. Update (reset) the validity and MAC hash skip limit values for the mobile station. After performing the location update, the paging controller notifies the base station of the location update result through the idle mode information response message, and the base station updates the validity of the idle mode operation of the mobile station by transmitting the ranging response message to the mobile station.

FIG. 11 is a flowchart illustrating an example in which a MAC hash elimination limit parameter is used in a location update process performed when a mobile station moves to another paging group after the idle mode is changed.

Referring to FIG. 11, the mobile station requests the base station to switch to the idle mode through the deregistration request message (DREG_REQ), and includes the MAC hash skip limit value parameter shown in Table 12 in the deregistration request message to request the base station. It may be (S1101).

The base station receiving the idle mode switch request from the mobile station through the deregistration request message transmits an idle mode information request message (Idle-Info-REQ) as shown in Table 13 to the paging controller in order to inform the mobile station to switch to idle mode ( S1102). As shown in Table 13, the idle mode information request message includes the MAC address of the mobile station for which the specific mobile station requests to switch to the idle mode and the MAC Hash Omit Limit Value TLV as shown in Table 12 received from the mobile station.

Upon receiving the idle mode information request message, the paging controller transmits an idle mode information response (Idle-Info-RSP) message as shown in Table 14 to the base station which has transmitted the idle mode information request message (S1103). As shown in Table 14, the idle mode information response (Idle-Info-RSP) message is the MAC address of the mobile station entering the idle mode, and the MAC hash skip limit value TLV as shown in Table 12. Value is 2). In addition, even if the paging controller receives the idle mode information request message that does not include the MAC hash skip limit value parameter, the paging controller may transmit the MAC hash skip limit value parameter to the idle mode information response message (Idle-Info-RSP) to the base station. have.

The base station receiving the idle mode information response message instructs the mobile station to switch the idle mode through the deregistration command message DREG-CMD requesting the idle mode switch (S1104). In this case, the deregistration command message includes a MAC hash skip limit value TLV together with paging information TLV such as paging period and paging offset, paging group ID, paging controller ID TLV, and idle mode maintenance information TLV. Include.

The paging controller sends a paging advertisement message (MOB-) instructing the mobile station to perform a specific operation in the next paging interval to all base stations belonging to the same paging group as the base station that allows the mobile station to switch to the idle mode at a predetermined paging period. In operation S1105, a paging-announce message indicating that the PAG-ADV is transmitted is transmitted.

At this time, the mobile station to maintain the idle mode by applying the MAC hash skip limit value to inform the base station whether the MAC hash address is included in the paging advertisement message transmitted to the mobile stations. That is, for a mobile station that omits the MAC address from the paging advertisement message, the paging controller does not include the MAC address and operation code of the mobile station in the paging notification message, and instructs the paging advertisement message to include the MAC address of the mobile station in the paging advertisement message. The MAC message and the action code (No action Required) of the mobile station are included in the notification message and transmitted to the base stations in the paging group.

When the MAC address of the mobile station is omitted in the paging notification message, the paging controller increases the number of MAC hashes omitted for the mobile station and updates (resets) the number of MAC hashes omitted when the MAC address of the mobile station is included.

Upon receiving the paging notification message from the paging controller, the base station delivers a paging advertisement message (MOB-PAG-ADV) to the mobile station at a predetermined paging period, and the mobile station transmits its identifier (MOB-PAG-ADV) through its paging advertisement message (MOB-PAG-ADV). When receiving the MAC address hash, the mobile station determines that the mobile station is normally operating in the idle mode, updates the validity of the idle mode operation, and updates (resets) the MAC hash skip limit value (S1106).

The paging controller may omit the MAC address and the operation code of the mobile station to the paging notification message within the number of times not exceeding the MAC hash skip limit value and transmit the same to the base stations (S1107). At this time, the number of times the MAC hash is omitted for the mobile station omitting the omitted MAC address is counted.

The base station transmits a paging advertisement message in a broadcast form by including a MAC address and an operation code of a corresponding mobile station including a MAC address and an operation code in a paging notification message received from a paging controller when a predetermined paging period arrives. The mobile station receives the paging advertisement message according to a predetermined paging period, and if the paging advertisement message does not include its MAC address, it is considered to be the same as receiving the operation code instructing to maintain the idle mode. However, the mobile station checks whether there is a problem in idle mode operation based on the MAC hash skip limit value received from the base station when switching to the idle mode. If the number of times that the mobile station identifier has not been continuously received from the paging advertisement message (MOB-PAG-ADV) does not exceed the MAC hash skip limit value, the mobile station maintains the idle mode (S1108).

If the mobile station moves to an area of another paging group, the procedure for updating its location to the new paging control station should be performed. The mobile station sends a ranging request (RNG-REQ) message to the base station to which it belongs to perform the location update procedure to the new paging controller. In this case, an indicator parameter indicating that the ranging request is for location update should be included in the ranging request message, and a MAC hash skip limit value parameter may be included (S1109).

Upon receiving the ranging request message for the location update from the mobile station, the base station transmits an idle mode information request message (Idle-Info-REQ) as shown in Table 13 to the paging controller to inform the mobile station of the location update (S1110). As shown in Table 13, the idle mode information request message includes the MAC address of the mobile station requesting the mobile station to switch to idle mode by the mobile station requesting the location update, and the MAC hash abbreviation limit TLV as shown in Table 12 received from the mobile station. do.

The paging controller receiving the idle mode information request message transmits an idle mode information response (Idle-Info-RSP) message as shown in Table 14 to the base station which has transmitted the idle mode information request message (S1111). As shown in Table 14, the idle mode information response (Idle-Info-RSP) message includes the MAC hash abbreviation limit value TLV (the value in the operation description of the present invention is 3) as shown in Table 12. In addition, even if the paging controller receives the idle mode information request message that does not include the MAC hash skip limit value parameter, the paging controller may transmit the MAC hash skip limit value parameter to the idle mode information response message (Idle-Info-RSP) to the base station. have.

The base station receiving the idle mode information response message transmits a ranging response (RNG-RSP) message to the mobile station requesting the location update, thereby informing that the location update procedure of the mobile station has been successfully performed (S1112). In this case, the ranging response message includes a paging information TLV such as a paging period, a paging offset, a paging group ID, a paging controller ID TLV, and an idle mode maintenance information TLV, and a MAC hash skip limit value TLV.

The paging controller may notify all base stations belonging to the paging group at a predetermined paging period in the next paging interval to notify the mobile station to send a paging advertisement message (MOB-PAG-ADV) indicating a specific operation. announce) delivers the message (S1113).

At this time, the mobile station to maintain the idle mode by applying the MAC hash skip limit value to inform the base station whether the MAC hash address is included in the paging advertisement message transmitted to the mobile stations. That is, for a mobile station that omits the MAC address from the paging advertisement message, the paging controller does not include the MAC address and operation code of the mobile station in the paging notification message, and instructs the paging advertisement message to include the MAC address of the mobile station in the paging advertisement message. The MAC message and the action code (No action Required) of the mobile station are included in the notification message and transmitted to the base stations in the paging group. When the MAC address of the mobile station is omitted in the paging notification message, the paging controller counts the number of MAC hashes omitted for the mobile station, and updates (resets) the number of MAC hashes omitted when the MAC address of the mobile station is included.

Upon receiving the paging notification message from the paging controller, the base station delivers a paging advertisement message (MOB-PAG-ADV) to the mobile station at a predetermined paging period, and the mobile station transmits its identifier (MOB-PAG-ADV) through its paging advertisement message (MOB-PAG-ADV). When receiving the MAC address hash, the mobile station determines that the mobile station is normally operating in the idle mode, updates the validity of the idle mode operation, and updates (resets) the MAC hash skip limit value (S1114).

The paging controller may omit the MAC address and operation code of the mobile station to the paging notification message within the number of times not exceeding the MAC hash skip limit value and transmit the same to the base stations (S1115). At this time, the number of times the MAC hash is omitted for the mobile station omitting the omitted MAC address is counted.

The base station transmits the paging advertisement message in a broadcast form including the MAC address and operation code of the mobile station included in the paging notification message received from the paging controller when the paging period is reached. The mobile station receives the paging advertisement message according to a predetermined paging period, and if the paging advertisement message does not include its MAC address, it is considered to be the same as receiving the operation code instructing to maintain the idle mode. However, the mobile station checks whether there is a problem in idle mode operation based on the MAC hash skip limit value received from the base station when switching to the idle mode. If the number of times that the mobile station identifier has not been continuously received from the paging advertisement message (MOB-PAG-ADV) does not exceed the MAC hash skip limit value, the mobile station maintains the idle mode (S1116).

The paging controller transmits a paging notification message including the MAC address and an operation code (No Action Required) of the mobile station to maintain the idle mode in order to update the MAC hash skip count, and initializes the MAC hash skip count (S1117). ).

The base station delivers the paging advertisement message set based on the paging notification message in a broadcast form in accordance with the paging period, and when the mobile station receives its mobile station identifier (MAC address) from the paging advertisement message, it determines that the mobile station is operating normally in the idle mode. Then, the validity of the idle mode operation is updated, and the MAC hash skip limit value is updated (reset) (S1118).

If the mobile station does not continuously receive its identifier (MAC address) in the paging advertisement message exceeding the MAC hash skip limit value, it may be determined that the idle mode operation is invalid. At this time, the mobile station can update the validity of the operation of the idle mode by performing the location update procedure to the paging controller through the ranging procedure. The mobile station requests ranging to the base station to perform the location update procedure, and includes a paging controller identifier and an indicator parameter indicating the location update. Upon receiving the ranging request message for location update, the base station transmits an idle mode information request message including the MAC address and location update operation code of the mobile station to the paging controller, and the paging controller performs location update for the mobile station. Update (reset) the validity and MAC hash skip limit values for the mobile station. After performing the location update, the paging controller notifies the base station of the location update result through the idle mode information response message, and the base station updates the validity of the idle mode operation of the mobile station by transmitting the ranging response message to the mobile station.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention reduces the size of a message for providing information on whether the idle mode is maintained, thereby more effectively utilizing downlink radio resources and minimizing power for message processing in an idle mode mobile station. have.

Claims (16)

In the idle mode (Idle Mode) performing method applied to a broadband wireless access system (Broadband Wireless Access System), Checking for all mobile stations in an idle mode state within the paging area whether it is necessary to maintain an idle mode state; And Broadcasting, if all mobile stations present in the idle mode in the paging area need to maintain the idle mode, broadcasting a paging advertisement message (MOB-PAG-ADV) in which the paging parameter is omitted. Idle mode performing method comprising a. The method of claim 1, And the paging parameter comprises a medium access control (MAC) address hash, an action code, and a TLV parameter for paging. The method of claim 1, If all the mobile stations present in the idle mode in the paging area need to maintain the idle mode and update the availability of the idle mode operation for at least one of the mobile stations, a paging parameter is included. Broadcasting a paging advertisement message (MOB-PAG-ADV) Idle mode performing method further comprising. In the idle mode (Idle Mode) performing method applied to a broadband wireless access system (Broadband Wireless Access System), Sending information regarding the number of skippable paging parameters to a specific mobile station; Checking whether all mobile stations that are in an idle mode state within a paging area in which the specific mobile station exists need to remain in an idle mode state; Broadcasting, if all mobile stations present in the idle mode in the paging area need to maintain the idle mode, broadcasting a paging advertisement message (MOB-PAG-ADV) in which the paging parameter is omitted; And Repeating broadcasting a paging advertisement message (MOB-PAG-ADV) in which the paging parameter is omitted, based on the number of times that can be omitted; Idle mode performing method comprising a. The method of claim 4, wherein When the step of repeatedly broadcasting the paging advertisement message (MOB-PAG-ADV) in which the paging parameter is omitted is completed, the paging advertisement message (MOB-PAG-ADV) including the paging parameter is terminated. The idle mode performing method further comprising the step of broadcasting (Broadcasting). In the idle mode (Idle Mode) performing method applied to a broadband wireless access system (Broadband Wireless Access System), Checking for the presence of a mobile station in idle mode within the paging area; Broadcasting a paging advertisement message (MOB-PAG-ADV) including information indicating that the paging parameter is not omitted, and omitting the paging parameter corresponding to the mobile station to maintain the idle mode according to the check result. Steps to Idle mode performing method comprising a. In the idle mode (Idle Mode) performing method applied to a broadband wireless access system (Broadband Wireless Access System), The mobile station transitions to idle mode; Receiving a message commonly broadcasted to a paging area; Checking whether the message is a message of a type comprising a paging parameter; And Maintaining an idle mode or performing an operation specified by the paging parameter according to the type of the message; Idle mode performing method comprising a. The method of claim 7, wherein If the message is a message of a type that does not include a paging parameter, the idle mode, characterized in that the idle mode. The method of claim 7, wherein And if the message is a message of a type including a paging parameter, performing the operation specified by the paging parameter. The method of claim 7, wherein And the paging parameter is a TLV parameter for mobile medium access control (MAC) address hash, action code, and paging. A method for performing idle mode of a mobile station applied to a broadband wireless access system, Receiving information regarding a possible number of paging parameters; The mobile station transitioning to an idle mode; Receiving a message commonly broadcasted to a paging area; Checking whether the message includes a paging parameter; Counting a number of receptions of the message not including the paging parameter when the paging parameter is not included; And Maintaining an idle mode or performing a network registration procedure or a location update procedure based on the skippable number of paging parameters and the count information; Idle mode performing method comprising a. The method of claim 11, The information about the number of times the paging parameter can be omitted is transmitted via a deregistration command message (DREG_CMD). The method of claim 11, The message is a method of performing idle mode, characterized in that the paging advertisement message (MOB-PAG-ADV). The method of claim 11, The information about the number of times that the paging parameter can be omitted is period information for transmitting a paging advertisement message (MOB-PAG-ADV) in which the paging parameter is omitted, to the mobile station that effectively performs the idle mode. How to perform idle mode. The method of claim 11, The information about the number of times that the paging parameter can be omitted is information on the maximum number of times that a paging advertisement message (MOB-PAG-ADV) in which the paging parameter is omitted can be transmitted to the mobile station that effectively performs the idle mode. How to perform idle mode. A method for performing idle mode of a mobile station applied to a broadband wireless access system, The mobile station transitions to idle mode; Receiving a message commonly broadcasted to a paging area; Checking whether the message is a message including a paging parameter; Checking whether the message includes a paging parameter corresponding to the mobile station; And If the message includes a paging parameter and a paging parameter for the mobile station is not included in the message, maintaining an idle mode; Idle mode performing method comprising a.

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