JP2008502271A - Method for controlling idle mode of mobile station in wireless connection system - Google Patents

Abstract

A method for controlling an idle mode of a mobile station in a wireless connection system is provided.
An idle mode control method includes a step of requesting an idle mode entry by transferring an idle mode request to a serving base station having a serving paging group identifier associated with a serving base station by a mobile station. The method also includes entering an idle mode by receiving an idle mode permission command from the serving base station. The method also includes initiating a ranging request between the mobile station and a target base station associated with the target paging group that includes the serving base station identifier and the serving paging group identifier. The method also comprises the step of the serving base station knowing that the mobile station is not in idle mode with the serving base station through the serving base station identifier, and the mobile station is connected to the target base station.
[Selection] Figure 2

Description

  The present invention relates to a wireless connection system, and more specifically to an idle mode of a mobile station.

  The broadband wireless access system supports an idle mode in order to minimize power consumption of a mobile station (MSS: Mobile Subscriber Station). In the idle mode, the mobile station does not need to perform a handoff procedure when moving between base stations included in the same paging zone. Therefore, the mobile station does not need to perform uplink information transfer for the handoff procedure, and power consumption can be reduced accordingly.

  The paging area is defined as an area controlled by a plurality of base stations called paging groups. Base stations included in the same paging area have a paging cycle (Paging_Cycle) and a paging offset (Paging_Offset) having the same value.

  The mobile station can request the base station to switch to the idle mode. The base station provides a paging message including its own paging area ID (Paging-group ID), a corresponding paging cycle, and a paging offset. As a result, the corresponding mobile station is switched to the idle mode state.

  During the idle mode, the mobile station can determine from the paging message provided from the base station every promised paging cycle whether to continue the idle mode or end the idle mode.

  If there is traffic to be transferred to a mobile station in the idle mode, the mobile station can end the idle mode. When traffic that must be transmitted to the mobile station in the idle mode occurs, the base station can cause the mobile station to exit the idle mode through paging. In addition, when the mobile station that is in the idle mode moves and moves to another paging area, or when paging cannot be received at a predetermined time due to loss of synchronization, the mobile station ends the idle mode. .

  In short, a mobile station that has entered idle mode receives periodic paging normally as long as there is no information to transfer or receive, thereby ensuring free movement in the same paging area without performing a handoff procedure. Is done.

  In order to configure one paging area, a paging group action (Paging-group-action) backbone message is transferred on the inter-base station wire. An example of the paging group backbone message is shown in Table 1.

前記ページンググループバックボーンメッセージは、基地局間に伝達される。前記バックボーンメッセージは、アクション（Action）フィールドの内容によって次の４つの用途に用いられることができる。

The paging group backbone message is transmitted between base stations. The backbone message can be used for the following four purposes depending on the content of the Action field.

  A receiving base station (target BS) can be designated as a specific paging group (Action = 0). The receiving base station can be excluded from the specific paging group (Action = 1). It is possible to ask which paging group the receiving base station belongs to (Action = 2). The paging group to which the base station (Sender BS) to be transmitted belongs can be notified to the target base station (target BS) (Action = 3).

  Since one base station can belong to one or more paging areas, the backbone message can include information for a plurality of paging groups. From the backbone message, the base station can confirm the paging cycle and paging offset used in each paging area. Base stations can be dynamically assigned to paging groups through the backbone message.

  In order for the mobile station to switch to the idle mode, DREG_REQ, which is one of the existing MAC messages, is used as the idle mode request message. The format of the idle mode request message (DREG_REQ) message is shown in Table 2 below.

移動局は、前記ＤＥＲＧ＿ＲＥＱメッセージのDe-registration Request Codeを０ｘ０１に設定して基地局に伝達することによって、自身が遊休モードに切り替えるということを要請できる。この時、所望のページング周期を伝達することも可能である。

The mobile station can request that it switches to the idle mode by setting the De-registration Request Code of the DERG_REQ message to 0x01 and transmitting it to the base station. At this time, a desired paging cycle can be transmitted.

  The serving base station that has received the DERG_REQ message can respond to the request of the mobile station through the existing DREG_CMD message. The format of the DREG_CMD message is shown in Table 3 below.

前記サービング基地局は、前記ＤＲＥＧ＿ＣＭＤメッセージのアクションコード（Action Code）を通じて遊休モードへの切り替えを許容する（Action Code＝０ｘ０５）、一定時間後に再び遊休モードへの切り替えを要請するようにする（Action Code＝０ｘ０６）、または、自身がＤＲＥＧ＿ＣＭＤを転送するまでそれ以上遊休モードへの切り替えを要請するのを許容しないことができる（Action Code＝０ｘ０７）。

The serving base station allows switching to the idle mode through an action code of the DREG_CMD message (Action Code = 0x05), and requests switching to the idle mode again after a certain time (Action Code). = 0x06), or it may not be allowed to request further switching to the idle mode until it transfers DREG_CMD (Action Code = 0x07).

  The detailed contents of the action code of the DREG_CMD message are shown in Table 4 below.

同じページング領域に属する各基地局は、遊休モードに切り替えた移動局に対する情報を共有できる。この情報に基づいて、ページング周期ごとに前記サービング基地局は前記各移動局が行うべき手順を知らせることができる。

Each base station belonging to the same paging area can share information with respect to the mobile station switched to the idle mode. Based on this information, the serving base station can inform the procedure to be performed by each mobile station for each paging cycle.

  For this purpose, the paging announcement (Paging-announce) backbone message shown in Table 5 below is used.

前記ページング案内バックボーンメッセージは、同じページング領域に属する全ての基地局に伝達される。前記ページング案内バックボーンメッセージを受信する基地局は、該メッセージに含まれている移動局のＭＡＣアドレスを、このメッセージ内のページング周期とページングオフセットに合わせてページングしなければならない。

The paging guidance backbone message is transmitted to all base stations belonging to the same paging area. The base station that receives the paging guidance backbone message must page the MAC address of the mobile station included in the message according to the paging cycle and paging offset in the message.

  As a result, through the paging guidance backbone message, all base stations belonging to a paging area can maintain the same MAC address of the mobile station that must be paged. Therefore, a certain mobile station can receive paging information for itself every paging cycle, as long as it does not deviate from the current paging area.

  Table 6 below shows the format of a paging message (MOB-PAG_ADV) that each base station transfers to a mobile station in an idle mode state through paging. The paging message is transmitted to the mobile station in a broadcast form.

前記ページングメッセージを受信した移動局は、自身が継続して遊休モードを維持できるのか（Action Code＝００）、位置情報更新のためにレンジング（ranging）を行わなければならないのか（Action Code＝０１）、自身に伝達しなければならない下りトラフィックを受信するために遊休モードを終了しなければならないのか（Action Code＝１０）を決定できる。

Whether the mobile station that has received the paging message can maintain the idle mode continuously (Action Code = 00), or must it perform ranging for position information update (Action Code = 01)? It is possible to determine whether the idle mode has to be terminated (Action Code = 10) in order to receive downlink traffic that must be transmitted to itself.

The mobile station can end the idle mode when traffic that the mobile station has to transfer occurs (uplink traffic occurs). Also, the mobile station can end the idle mode when traffic that must be received occurs (downlink traffic occurs). Also, the idle mode can be terminated if the current paging area is not reached or periodic paging cannot be received due to a problem in the transfer process.
FIG. 1 is a diagram for explaining a procedure for ending idle mode when downlink traffic to be transmitted to a mobile station in idle mode occurs. With reference to FIG. 1, the procedure for ending the idle mode will be described.

  The base station does not know in which base station the mobile station in the idle mode is located. Therefore, the downlink traffic is unconditionally transmitted to the base station (first base station) from which the corresponding mobile station first requested switching to the idle mode.

  When downlink traffic to a mobile station that has been allowed to switch to idle mode is received, the first base station (first base station) assigns an action code to all base stations in the paging area to which it belongs. 11 is set, and the paging guidance backbone message is transferred (S11).

  All the base stations that have received the paging guidance message set the action code of the paging message MOV_PAG_ADV to 10 and transfer it to the broadcasting form to all the mobile stations in their area (S12).

  The corresponding mobile station that has received the paging message ends the idle mode and requests re-registration to the network from the second base station (current base station) that is in charge of the region where it is currently located (S13). The second base station can confirm the base station ID of the first base station through the paging guidance message.

  The second base station that has received the re-registration request sets the action flag (Action flag) of the MSS_Info_Request backbone message to be transferred between the base stations by wire, and transfers it, thereby allowing the first base station to search. The mobile station to be notified is informed of its own area (S14).

  An example of the MSS_Info_Request backbone message is shown in Table 7 below.

前記ＭＳＳ＿Ｉｎｆｏ＿Ｒｅｑｕｅｓｔを受信した前記第１基地局は、ページング案内バックボーンメッセージを通じて、自身と同じページング領域にある全ての基地局に、遊休モードを終了した移動局をページング目録から削除するように知らせる。

The first base station that has received the MSS_Info_Request informs all base stations in the same paging area as that of the first base station through the paging guidance backbone message to delete the mobile stations that have ended the idle mode from the paging inventory.

  Accordingly, the present invention relates to a method for controlling an idle mode of a mobile station in a wireless connection system in order to solve at least one problem in the prior art.

  An object of the present invention is to inform a base station that allows an idle mode first when the mobile station must end the idle mode in the first paging region because it moves from one paging region to another paging region. Accordingly, it is an object of the present invention to provide an idle mode control method that can prevent unnecessary paging in a paging area.

  Another object of the present invention is to provide a method for controlling an idle mode more efficiently using a paging controller when a mobile station moves from one paging area to another paging area.

  As an embodiment of the present invention that achieves the above object, at least a serving base station associated with a serving paging group and a target base station associated with a target paging group (target paging group) base station) and a idle mode between a mobile subscriber station and a mobile subscriber station, the idle mode control method includes: a serving paging group identifier associated with the serving base station and a serving Transferring an idle mode request to the serving base station including a base station identifier and requesting an idle mode entry. The method also includes receiving an idle mode grant command including the serving base station identifier and the serving paging group identifier from the serving base station and entering the idle mode. The method also includes initiating a ranging request between the mobile station and a target base station associated with the target paging group that includes the serving base station identifier and the serving paging group identifier. In addition, the method includes the step of the serving base station determining that the mobile station is not in an idle mode with the serving base station through the serving base station identifier, and the mobile station is connected to the target base station. .

  The network preferably further includes a paging controller operatively coupled to the serving base station. The serving base station identifier is preferably replaceable with a paging controller identifier associated with the paging controller. The ranging request to the target base station is preferably further including a location update request. Preferably, the method further comprises receiving a ranging response including a location update response.

  As another example, a network including at least a serving base station associated with a serving paging group and a target base station associated with a target paging group The idle mode control method includes a serving paging group identifier and a serving base station associated with the serving base station from the mobile station for entering the idle mode. Receiving an idle mode request directed to the serving base station including an identifier. The method also includes the step of the serving base station transferring an idle mode grant command including the serving base station identifier and the serving paging group identifier to the mobile station. The method also includes receiving a connection request including the serving base station identifier and the serving paging group identifier from the mobile station to a target base station associated with the target paging group. In addition, the method includes the step of the serving base station determining that the mobile station is not in an idle mode with the serving base station through the serving base station identifier, and the mobile station is connected to the target base station. .

  The connection request to the target base station is preferable, and further includes a location update request. The method preferably further comprises the steps of: transferring an idle mode information request message to the paging controller; receiving an idle mode information response message from the paging controller; and transferring a ranging response to the mobile station.

  The paging controller preferably informs the serving base station and other base stations associated with the serving paging group that the mobile station is not in idle mode with the serving base station. The paging controller preferably informs the target base station and other base stations associated with the target paging group that the mobile station has reentered idle mode with the target base station.

  The present invention can be applied to a wireless communication system including a broadband wireless access system with various effects.

  Hereinafter, preferred embodiments of a mobile station idle mode support method in a broadband wireless access system according to the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals and symbols are used in common as much as possible for the same or similar parts.

  The present invention can be used in an IEEE 802 broadband wireless access system. The present invention can be used for any type of wireless connection system.

  FIG. 2 is a diagram for explaining a process of terminating an idle mode of a mobile station in a wireless connection system according to a preferred embodiment of the present invention.

  Referring to FIG. 2, the mobile station 250 that has been in the idle mode in the first paging area 225 has moved to the second paging area 235. Hereinafter, a procedure for terminating the idle mode of the mobile station 250 in the first paging area 225 in this case will be disclosed.

  Since each paging area uses a different paging cycle and paging offset, when the mobile station 250 that is in the idle mode in the first paging area 225 moves to the second paging area 235, periodic paging is performed. Cannot receive. The first base station (first base station) 220 can allow the mobile station 250 to switch to the idle mode within the first paging area 225.

  Accordingly, the mobile station 250 ends the idle mode and requests the second base station 230 in the second paging area 235 to re-register with the network [S21]. The second base station 230) does not know the base station ID of the first base station 220, so the mobile station 250 must inform the base station ID of the first base station 220 in the process of requesting re-registration to the network. I must.

  In order to inform the second base station 230 of the base station ID of the first base station 220, a ranging request message RNG_REQ for a network re-registration request can be used. An example of a preferable configuration of the ranging request message RNG_REQ is shown in Table 8 below.

移動局２５０から再登録要請を受けた第２基地局２３０は、ＭＳＳ−Ｉｎｆｏ−Ｒｅｑｕｅｓｔバックボーンメッセージのアクションフラッグを２と設定して（すなわち、移動局２５０が他のページング領域へ移動したことを表示して−表７参照）、第１基地局２２０に伝達する［Ｓ２２］。第２基地局２３０は、移動局２５０から第１基地局２２０の基地局ＩＤ（表８で‘Initiating BS ID’）を受信したので、この第１基地局２２０に上記ＭＳＳ＿Ｉｎｆｏ＿Ｒｅｑｕｅｓｔバックボーンメッセージを転送することができる。

The second base station 230 that has received the re-registration request from the mobile station 250 sets the action flag of the MSS-Info-Request backbone message to 2 (that is, indicates that the mobile station 250 has moved to another paging area). Then, refer to Table 7) and transmit it to the first base station 220 [S22]. Since the second base station 230 has received the base station ID of the first base station 220 (“Initiating BS ID” in Table 8) from the mobile station 250, the second base station 230 transfers the MSS_Info_Request backbone message to the first base station 220. Can do.

  The first base station 220 that has received the MSS_Info_Request from the second base station 230 has terminated the idle mode from the paging guidance backbone message to all base stations in the same paging area as that of the own base station 220, that is, the first paging area 225. Notify the mobile station 250 to delete it from the paging inventory. All the base stations in the first page area that have received this notification end the idle mode for the mobile station 250 by deleting the mobile station 250 from the paging inventory.

FIG. 3 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a first embodiment of the present invention.
As shown in FIG. 3, when a mobile station 350 (MSS; Mobile Subscriber Station) attempts to switch to an idle mode, the idle mode switch request DREG_REQ message is transferred to the first base station 320 to which the mobile station 350 belongs. A switch is requested (S31). This DREG_REQ message includes information for requesting deregistration from the serving base station to which the DREG_REQ message belongs (De-registration Request Code) and TLV encoded information (for example, paging cycle request TLV, idle mode maintenance information TLV, MAC hash omission limit value) TLV).

  The first base station 320 that has received the idle mode switching request message transfers an idle mode information request message Idle-Info-REQ for notifying information of the mobile station 350 that requests switching to the idle mode to the paging controller 370. (S32). Table 9 shows an example of the idle mode information request message.

表９に示すように、遊休モード情報要請メッセージは、特定移動局が遊休モードへの切り替えを要請するという情報、移動局のＭＡＣアドレス、移動局のサービスフロー情報及びＴＬＶエンコーディングされた情報（例えば、遊休モード維持情報ＴＬＶ、ＭＡＣハッシュ省略限度値ＴＬＶ）を含むことができる。

As shown in Table 9, the idle mode information request message includes information that the specific mobile station requests to switch to the idle mode, the MAC address of the mobile station, service flow information of the mobile station, and TLV encoded information (for example, Idle mode maintenance information TLV, MAC hash omission limit value TLV).

  The paging controller 370 that has received the idle mode information request message transfers an idle mode information response idle-info-RSP message to the serving base station that has transferred the idle mode information request message, that is, the first base station 320. (S33).

  Table 10 shows an example of the idle mode information response Idle-Info-RSP message.

表１０に示すように、遊休モード情報応答Ｉｄｌｅ−Ｉｎｆｏ−ＲＳＰメッセージは、移動局が遊休モードに切り替えたことを知らせる情報、移動局のＭＡＣアドレス、移動局のサービスフロー情報及びＴＬＶエンコーディングされた情報（例えば、ページング情報ＴＬＶ、ページング制御器ＩＤ ＴＬＶ、遊休モード維持情報ＴＬＶ、ＭＡＣハッシュ省略限度値ＴＬＶ）を含むことができる。

As shown in Table 10, the idle mode information response Idle-Info-RSP message includes information indicating that the mobile station has switched to the idle mode, the MAC address of the mobile station, service flow information of the mobile station, and TLV encoded information. (Eg, paging information TLV, paging controller ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV).

  The second base station 330 that has received the idle mode information response Idle-Info-RSP message transfers the idle mode instruction message DREG-CMD to the mobile station 350 that has requested the idle mode switching (S34). The idle mode instruction message includes information for instructing idle mode switching and TLV encoded information (for example, paging information TLV, paging controller ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV). Can do.

  In one embodiment, when the mobile station 350 moves to the area of the second base station that is a base station belonging to another paging group (ie, paging group ID = 2) in the idle mode state, the mobile station 350 moves to the second base station 330. Then, the ranging request message RNG_REQ including the handover indicator TLV and the paging controller 370 identifier TLV is transferred (S35) to inform the second base station 330 that the idle mode is to be terminated. The second base station 330 transmits the idle mode information request Idle-Info-REQ message to the paging controller 370 having the paging controller 370 identifier transmitted via the ranging request message, so that the mobile station 350 is idle. It is notified that the mode has ended (S36).

  Also, the second base station 330 transfers the ranging response message RNG_RSP to the mobile station 350 (S37), and the mobile station 350 performs a network entry procedure using the ranging response message (S38). The paging controller 370 informs all base stations that belong to the previous paging group (that is, paging group ID = 1) like the first base station 320 that the corresponding mobile station 350 has ended the idle mode. The response message can be transferred (S39). Using this idle mode information response message as a response to reception, each base station belonging to the previous paging group (ie, paging group ID = 1) updates the list of mobile stations currently in the idle mode.

  FIG. 4 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a second embodiment of the present invention.

  As shown in FIG. 4, when a mobile station 450 (MSS; Mobile Subscriber Station) attempts to switch to an idle mode, the idle mode switch is performed by transferring an idle mode switch request DREG_REQ message to the serving base station to which the mobile station 450 belongs. Request (S41). This DREG_REQ message includes information for requesting deregistration from the base station to which it belongs (De-registration Request Code) and TLV encoded information (for example, paging cycle request TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV) ) Can be included.

  The first base station 420 that has received the idle mode switching request message transfers an idle mode information request message Idle-Info-REQ to inform the information of the mobile station 450 that requests switching to the idle mode to the paging controller 470. (S42). An example of this idle mode information request message is as shown in Table 9. As shown in Table 9, the idle mode information request message includes information that the specific mobile station 450 requests to switch to the idle mode, the MAC address of the mobile station 450, the service flow information of the mobile station 450, and TLV encoded information. (For example, idle mode maintenance information TLV, MAC hash omission limit value TLV) may be included.

  Upon receiving the idle mode information request message, the paging controller 470 transfers an idle mode information response Idle-Info-RSP message to the serving base station that transferred the idle mode information request message, that is, the first base station 420 ( S43). Table 10 shows an example of the idle mode information response Idle-Info-RSP message.

  As shown in Table 10 above, the idle mode information response Idle-Info-RSP message includes information indicating that the mobile station 450 has switched to the idle mode, the MAC address of the mobile station 450, the service flow information of the mobile station 450, and the TLV. Encoded information (eg, paging information TLV, paging controller 470ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV) may be included.

  The second base station 430 that has received the idle mode information response Idle-Info-RSP message transfers the idle mode instruction message DREG_CMD to the mobile station 450 that has requested the idle mode switching (S44). This idle mode instruction message includes information for instructing idle mode switching and TLV encoded information (for example, paging information TLV, paging controller 470ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV). Can do.

  As another example, when the mobile station 450 moves to the second base station 430 region and the second base station 430 belongs to a different paging group from the first base station 420, the mobile station 450 is the current serving base station. In order to request the second base station 430 to perform an idle mode location update procedure, a ranging request message including a location update request TLV is transferred to the second base station 430 in addition to the handover indicator TLV and the paging controller 470 identifier TLV. (S45). The second base station 430 transmits an idle mode information request message requesting location update to the paging controller 470 (S46).

  Meanwhile, the paging controller 470 informs all base stations in the paging group to which the first base station 420 belongs (that is, paging group ID = 1) that the corresponding mobile station 450 has ended the idle mode. The response message can be transferred (S49). Each base station that has received this idle mode information response message updates the list of mobile stations that are currently in the idle mode.

  FIG. 5 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a third embodiment of the present invention.

  As shown in FIG. 5, when a mobile station 550 (MSS; Mobile Subscriber Station) attempts to switch to an idle mode, the idle mode switch is performed by transferring an idle mode switch request DREG_REQ message to the serving base station to which the mobile station 550 belongs. Request (S51). This DREG_REQ message includes information for requesting deregistration from the serving base station to which the DREG_REQ message belongs (De-registration Request Code) and TLV encoded information (for example, paging cycle request TLV, idle mode maintenance information TLV, MAC hash omission limit value) TLV).

  The first base station 520 that has received the idle mode switching request message transfers an idle mode information request message Idle-Info-REQ to inform the information of the mobile station 550 requesting switching to the idle mode to the paging controller 570. (S52). An example of this idle mode information request message is as shown in Table 9 above. As shown in Table 9, the idle mode information request message includes information that the specific mobile station 550 requests to switch to the idle mode, the MAC address of the mobile station 550, service flow information of the mobile station 550, and TLV encoded information. (For example, idle mode maintenance information TLV, MAC hash omission limit value TLV) may be included.

  The paging controller 570 that has received the idle mode information request message transfers an idle mode information response Idle-Info-RSP message to the serving base station that has transferred the idle mode information request message (S43). Table 10 shows an example of the idle mode information response Idle-Info-RSP message.

  As shown in Table 10 above, the idle mode information response Idle-Info-RSP message includes information indicating that the mobile station 550 has switched to the idle mode, the MAC address of the mobile station 550, the service flow information of the mobile station 550, and the TLV. Encoded information (eg, paging information TLV, paging controller 570ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV) may be included.

  The second base station 530 that has received the idle mode information response Idle-Info-RSP message transfers the idle mode instruction message DREG-CMD to the mobile station 550 that has requested the idle mode switching (S54). This idle mode instruction message includes information for instructing idle mode switching and TLV encoded information (for example, paging information TLV, paging controller 570ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV). Can do.

  If the mobile station 550 is informed that the second base station 530 cannot perform the requested location update procedure through the ranging response message, the mobile station 550 performs a procedure for re-entering the network (S57). When the mobile station 550 performs a procedure for re-entering the network, the second base station 530 transmits an idle mode information request message for notifying that the mobile station 550 re-enters the network to the paging controller 570 (S58). ).

  Also, the paging controller 570 informs all base stations in the paging group to which the first base station 520 belongs (that is, paging group ID = 1) that the corresponding mobile station 550 has ended the idle mode. The response message can be transferred (S59). Each base station belonging to the paging group (that is, paging group ID = 1) that has received this idle mode information response message updates the list of mobile stations that are currently in the idle mode.

  FIG. 6 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a fourth embodiment of the present invention.

  As shown in FIG. 6, when a mobile station 650 (MSS; Mobile Subscriber Station) attempts to switch to an idle mode, the idle mode switch is performed by transferring an idle mode switch request DREG_REQ message to the serving base station to which the mobile station 650 belongs. Request (S61). This DREG_REQ message includes information for requesting deregistration from the base station to which it belongs (De-registration Request Code) and TLV encoded information (for example, paging cycle request TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV) ) Can be included.

  The first base station 620 that has received the idle mode switching request message transfers an idle mode information request message Idle-Info-REQ for notifying information of the mobile station 650 requesting switching to the idle mode to the paging controller 670. (S62). An example of this idle mode information request message is as shown in Table 9 above. As shown in Table 9, the idle mode information request message includes information that the specific mobile station 650 requests to switch to the idle mode, the MAC address of the mobile station 650, service flow information of the mobile station 650, and TLV encoded information. (For example, idle mode maintenance information TLV, MAC hash omission limit value TLV) may be included.

  The paging controller 670 that has received the idle mode information request message transfers an idle mode information response Idle-Info-RSP message to the serving base station that has transferred the idle mode information request message, that is, the first base station 620 (S63). ). Table 10 shows an example of the idle mode information response Idle-Info-RSP message.

  As shown in Table 10, the idle mode information response Idle-Info-RSP message includes information indicating that the mobile station 650 has switched to the idle mode, the MAC address of the mobile station 650, service flow information of the mobile station 650, and TLV encoding. (Eg, paging information TLV, paging controller 670ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV).

  The second base station 630 that has received the idle mode information response Idle-Info-RSP message transfers the idle mode instruction message DREG-CMD to the mobile station 650 that has requested the idle mode switching (S64). This idle mode instruction message includes information for instructing idle mode switching and TLV encoded information (for example, paging information TLV, paging controller 670 ID TLV, idle mode maintenance information TLV, MAC hash omission limit value TLV). be able to.

  In addition, when the mobile station 650 moves to the second base station 630 area and the second base station 630 belongs to a different paging group from the first base station 620, the mobile station 650 sends a ranging request message for requesting location update. Is transferred to the second base station 630 (S65).

  The second base station 630 notifies the paging controller 670 that the mobile station 650 has requested location update by transmitting an idle mode information request message (S66). If the paging controller 670 cannot perform the requested procedure for location update, it notifies the second base station 630 that the requested location update procedure is impossible through the idle mode information response message (S67). ). Then, the second base station 630 notifies the mobile station 650 that the location update procedure has failed via the ranging response message (S68). In response to the ranging response message, the mobile station 650 performs a procedure for reentering the network (S69).

  When the network re-entry ends, the second base station 630 notifies the paging controller 670 that the network re-entry has ended through an idle mode information request message (S70). The paging controller 670 sends an idle mode information response message to all the base stations in the paging group to which the first base station 620 belongs (that is, paging group ID = 1) that the mobile station 650 has finished the idle mode. It can be transferred (S71). Each base station that has received this message updates the list of mobile stations currently in idle mode.

  In one embodiment, a network including at least a serving base station associated with a serving paging group and a target base station associated with the target paging group A method for controlling an idle mode between mobile subscriber stations, wherein the idle mode control method includes the serving base including a serving paging group identifier and a serving base station identifier associated with the serving base station. It includes the step of transmitting an idle mode request to the station and requesting the idle mode entry. The method also includes receiving an idle mode grant command including the serving base station identifier and the serving paging group identifier from the serving base station and entering the idle mode. The method also includes initiating a ranging request between the mobile station and a target base station associated with the target paging group that includes the serving base station identifier and the serving paging group identifier. In addition, the method includes the step of the serving base station determining that the mobile station is not in an idle mode with the serving base station through the serving base station identifier, and the mobile station is connected to the target base station. .

  The network preferably further includes a paging controller operatively coupled to the serving base station. The serving base station identifier is preferably replaceable with a paging controller identifier associated with the paging controller. The ranging request to the target base station is preferably further including a location update request. Preferably, the method further comprises receiving a ranging response including a location update response.

  As another example, a network including at least a serving base station associated with a serving paging group and a target base station associated with a target paging group The idle mode control method includes a serving paging group identifier and a serving base station associated with the serving base station from the mobile station for entering the idle mode. Receiving an idle mode request directed to the serving base station including an identifier. The method also includes the step of the serving base station transferring an idle mode grant command including the serving base station identifier and the serving paging group identifier to the mobile station. The method also includes receiving a connection request including the serving base station identifier and the serving paging group identifier from the mobile station to a target base station associated with the target paging group. In addition, the method includes the step of the serving base station determining that the mobile station is not in an idle mode with the serving base station through the serving base station identifier, and the mobile station is connected to the target base station. .

  The connection request to the target base station is preferable, and further includes a location update request. The method preferably further comprises the steps of: transferring an idle mode information request message to the paging controller; receiving an idle mode information response message from the paging controller; and transferring a ranging response to the mobile station.

  The paging controller preferably informs the serving base station and other base stations associated with the serving paging group that the mobile station is not in idle mode with the serving base station. The paging controller preferably informs the target base station and other base stations associated with the target paging group that the mobile station has reentered idle mode with the target base station.

  According to the mobile station idle mode control method in the wireless access system according to the present invention, when a terminal that is in the idle mode leaves the paging area, the idle mode for the existing paging area can be effectively terminated and unnecessary traffic is generated. Can be prevented. In addition, the present invention can provide a method capable of controlling the idle mode more efficiently using the paging controller.

  It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the invention. Accordingly, the above detailed description should not be construed as restrictive in any aspect, but should be considered as exemplary. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes that come within the equivalent scope of the invention are included in the scope of the invention.

It is a figure for demonstrating the procedure which complete | finishes an idle mode, when there exists downstream traffic. FIG. 5 is a diagram illustrating a process of ending an idle mode of a mobile station in a wireless connection system according to a preferred embodiment of the present invention. 3 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a first embodiment of the present invention. 4 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a second embodiment of the present invention. 4 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a third embodiment of the present invention. 10 is a flowchart illustrating a method for controlling an idle mode in a broadband wireless access system including a paging controller according to a fourth embodiment of the present invention.

Claims (23)

A network including at least a serving base station associated with a serving paging group and a target base station associated with a target paging group and a mobile subscriber in the method of controlling the idle mode between stations)
The mobile station forwards an idle mode request to the serving base station including a serving paging group identifier and a serving base station identifier associated with the serving base station, and requests idle mode entry;
Receiving an idle mode grant command including the serving base station identifier and the serving paging group identifier from the serving base station, and entering the idle mode;
Initiating a ranging request between the mobile station and a target base station associated with the target paging group including the serving base station identifier and the serving paging group identifier;
The serving base station knows that the mobile station is not in an idle mode with the serving base station through the serving base station identifier, and the mobile station connects with the target base station;
An idle mode control method comprising:   The idle mode control method of claim 1, wherein the network further comprises a paging controller operatively connected to the serving base station.   The idle mode control method of claim 2, wherein the serving base station identifier is replaced with a paging controller identifier associated with the paging controller.   The idle mode control method according to claim 1, wherein the ranging request to the target base station further includes a location update request.   The idle mode control method of claim 4, further comprising receiving a ranging response including a location update response. A network including at least a serving base station associated with a serving paging group and a target base station associated with the target paging group and a mobile station (mobile In the method of controlling the idle mode between subscriber stations)
Receiving an idle mode request from the mobile station to the serving base station including a serving paging group identifier and a serving base station identifier for entering the idle mode;
The serving base station transferring an idle mode grant command including the serving base station identifier and the serving paging group identifier to the mobile station;
From the mobile station to a target base station associated with the target paging group and receiving a connection request including the serving base station identifier and a serving paging group identifier;
The serving base station knows that the mobile station is not in an idle mode with the serving base station through the serving base station identifier, and the mobile station connects with the target base station;
An idle mode control method comprising:   The idle mode control method according to claim 6, wherein the network is operatively connected to the serving base station.   The idle mode control method according to claim 7, wherein the serving base station identifier is replaced with a paging controller identifier associated with the paging controller.   The idle mode control method according to claim 6, wherein the connection request to the target base station further includes a location update request. Transferring an idle mode information request message to the paging controller;
Receiving an idle mode information response message from the paging controller;
Transferring a ranging response to the mobile station;
The idle mode control method according to claim 9, further comprising:   The idle mode control method according to claim 9, further comprising a step of transferring a ranging response to the mobile station.   The paging controller informs the serving base station and other base stations associated with the serving paging group that the mobile station is not in idle mode with the serving base station. The idle mode control method described.   The paging controller informs the target base station and other base stations associated with the target paging group that the mobile station has reentered idle mode with the target base station. 8. The idle mode control method according to 7. To control the network and idle mode including a serving base station associated with a serving paging group and a target base station associated with a target paging group Mobile subscriber stations
Means for the mobile station to transmit an idle mode request to the serving base station including a serving paging group identifier and a serving base station identifier associated with the serving base station, and to request an idle mode entry;
Means for receiving an idle mode grant command including the serving base station identifier and the serving paging group identifier from the serving base station and entering the idle mode;
Means for initiating a ranging request including the serving base station identifier and the serving paging group identifier between the mobile station and a target base station associated with the target paging group;
The serving base station knows through the serving base station identifier that the mobile station is not in idle mode with the serving base station, the mobile station being connected to the target base station;
A mobile station comprising:   The mobile station of claim 14, wherein the network further comprises a paging controller operatively connected to the serving base station.   The mobile station according to claim 15, wherein the serving base station identifier is replaced with a paging controller identifier associated with the paging controller.   The mobile station according to claim 14, wherein the ranging request to the target base station further includes a location update request. At least a serving base station associated with a serving paging group and a target base station associated with a target paging group, and a mobile subscriber station )
Means for receiving an idle mode request from the mobile station to the serving base station including a serving paging group identifier associated with the serving base station and a serving base station identifier for entering the idle mode;
Means for transferring an idle mode grant command including the serving base station identifier and the serving paging group identifier from the serving base station to the mobile station;
Means for traveling from the mobile station to a target base station associated with the target paging group and receiving a connection request including the serving base station identifier and a serving paging group identifier;
The serving base station knows through the serving base station identifier that the mobile station is not in idle mode with the serving base station, the mobile station being connected to the target base station;
With a network.   The network of claim 18, wherein the network further comprises a paging controller operatively coupled to the serving base station.   The network of claim 18, wherein the serving base station identifier is replaced with a paging controller identifier associated with the paging controller.   The network of claim 18, wherein the connection request to the target base station further includes a location update request.   The paging controller informs the serving base station and other base stations associated with the serving paging group that the mobile station is not in idle mode with the serving base station. The described network.   The paging controller informs the target base station and other base stations associated with the target paging group that the mobile station has reentered idle mode with the target base station. 19. The network according to 19.

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