JP4739331B2 - Method for supporting idle mode of mobile station in wireless connection system - Google Patents

Description

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

  The broadband wireless access system supports an idle mode in order to minimize power consumption of a mobile station (MSS). 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.

  A paging area is defined as an entire area that is handled by a plurality of base stations called paging groups, but 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 transmits its own paging area ID (Paging-group ID), a paging cycle and a paging offset. The corresponding mobile station is switched to the idle mode state.

  During the idle mode, the mobile station can determine whether to continuously maintain the idle mode or to end from the paging transmitted from the base station to the broadcast form every promised paging cycle. is there.

  When there is traffic to be transferred by the mobile station in the idle mode, the mobile station can end the idle mode. When traffic that needs to be transmitted to a 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 a 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 can end 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.

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

前記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 backbone message is transmitted between base stations. The backbone message can be used for the following four purposes according to 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). It is possible to inform which paging group the transmitting base station (Sender BS) belongs to (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. The format of the 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 to switch 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 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.

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しないようにすることができる（Ａｃｔｉｏｎ Ｃｏｄｅ＝０ｘ０７）。

The base station allows switching to the idle mode through the action code (Action Code) of the DREG_CMD message (Action Code = 0x05), and requests the switching to the idle mode again after a certain time (Action Code = 0x06). ), Or it is possible not 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なければならなく、これによってページング周期ごとに前記各移動局が行なわなければならない手順を知らせなければならない。

Each base station belonging to the same paging area must be able to share information for mobile stations switched to idle mode, thereby notifying the procedure that each mobile station must perform every paging cycle.

  For this purpose, the 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なければならない。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必ずページングしなければならない。

The paging guidance backbone message must be transmitted to all base stations belonging to the same paging area. The base station that receives the paging guidance backbone message must always page the MAC address of the mobile station included in the message in accordance with 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 unless it leaves 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、２ビットのアクションコード（Ａｃｔｉｏｎ Ｃｏｄｅ）を通じて、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インジング（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) through a 2-bit action code (action code), or ranging for updating location information. Can be determined (Action Code = 01) or whether the idle mode must be terminated (Action Code = 10) in order to receive downlink traffic to be transmitted to itself.

  When there is traffic that the mobile station must transfer (uplink traffic occurs), the mobile station must end the idle mode. Also, the mobile station must end the idle mode when traffic that must be received occurs (downlink traffic occurs). If the current paging area is not reached or periodic paging cannot be received due to a problem in the transfer process, the idle mode must be terminated.

  The present invention relates to a method for supporting an idle mode of a mobile station in a wireless access system that essentially solves at least one problem of the prior art.

  An object of the present invention is to accurately indicate the operation of the idle mode by accurately indicating the operation to be performed by the terminal in the idle mode state, which is a technique for minimizing the terminal power consumption of the broadband wireless access system. An object of the present invention is to provide a terminal idle mode support method in a broadband wireless access system that can guarantee operation.

  As an embodiment of the present invention for achieving the above object, a method for supporting a mobile station in an idle mode in a wireless communication system using a paging controller is described below. Including entering the idle mode. Also, the paging command word is sent from at least one of the plurality of base stations belonging to the same paging group as a response to the paging announcement transferred from the paging controller. In order to check the availability of the mobile station with respect to at least one of the plurality of base stations included in the paging group while the mobile station is in the idle mode. receiving a paging command including a paging command action code associated with performing the ranging. Also, a plurality of base stations belonging to the same paging group receive an idle mode end state from the paging controller, the mobile station exits the idle mode (exit), and the base station Including setting up a connection with one.

  The paging announcement may be generated from the paging controller when there is downlink traffic data to be transmitted to the mobile station. Also, the paging announcement is preferably generated from the paging controller when there is uplink traffic data from the mobile station. Preferably, the idle mode response command word may include at least one of a paging identifier, a paging cycle, and a paging cycle offset. Exiting the idle mode and setting up a connection preferably includes transmitting a ranging request to one of the plurality of base stations associated with the mobile station; Receiving a ranging response from one of the plurality of base stations.

  The paging announcement is preferably (1) adding the mobile station to a paging list; (2) removing the mobile station from the paging list; (3) performing ranging to establish a location; and (4) A paging announcement action code including at least one of the network ingresses may be included. The paging command action code may preferably include at least one of (1) network entry; and (2) ranging performance to establish a location.

  In the idle mode entry step, preferably, the mobile station requests an idle mode entry from a serving base station associated with a paging controller that controls a plurality of base stations associated with the paging group. Can further be included. The idle mode entry step may further include receiving an idle mode response command for entering the idle mode from the serving base station.

  Preferably, the paging controller may be identified by a paging controller identifier, and the mobile station may be identified by a MAC (medium access controller) identifier. The paging command word may preferably include information for identifying the mobile station using the MAC identifier. The paging guidance may preferably include information for identifying the mobile station using the MAC identifier. Preferably, the idle mode entering step by the mobile station further includes a step of the paging controller notifying a plurality of base stations belonging to the paging group of an idle mode entering status of the mobile station. Can do.

  As another example, a method of supporting an idle mode by a network in a wireless communication system using a paging controller may be performed by a mobile station to a paging group in order to enter the idle mode. Receiving a request to a serving base station associated with a paging controller controlling a plurality of base stations to which it belongs. Also, the method includes a step of transferring an idle mode response command for entering the idle mode from the serving base station to the mobile station. Also, from at least one of a plurality of base stations belonging to the same paging group, a response to the paging guidance transferred from the paging controller is generated from at least one of the plurality of base stations, and the mobile station Paging associated with performing ranging to check availability of the mobile station for at least one of a plurality of base stations included in the paging group while in idle mode The method includes the step of transferring a paging command including a commanding action code. Also, the method includes establishing a connection between one of the plurality of base stations and the mobile station. The method further includes a step of transferring an idle mode exit status from the paging controller to a plurality of base stations belonging to the same paging group.

  Preferably, the method may further include transferring an idle mode information request message from the serving base station to the paging controller in order to provide information corresponding to the mobile station. . Preferably, the paging controller receives the idle mode information request message from the serving base station, and the idle mode information request message corresponds to a MAC access controller hash skip threshold. When the information is included, the method may further include transferring an idle mode information response message from the paging controller to at least one of the plurality of base stations.

  Preferably, the paging controller receives the idle mode information request message from the serving base station, and sends an idle mode information response message from the paging controller to the serving base station. And transferring. The idle mode information response message is preferably forwarded to at least one of the plurality of base stations to inform at least one of the plurality of base stations that the mobile station has exited the idle mode. Information can be included. Preferably, the method may further include a step of transferring an idle mode command message from the serving base station to the mobile station as a response to the idle mode information response message.

  The present invention can be applied in a broadband wireless access system.

  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 for the content of the IEEE 802 broadband wireless access system standard. The present invention can be used for the contents of any type of wireless connection system.

  FIG. 1 is a block diagram illustrating a paging group according to an embodiment of the present invention.

  As shown in FIG. 1, at least one base station may constitute a paging group. Base stations belonging to the same paging group transmit and receive information necessary for providing the idle mode through a backbone message. On the other hand, information necessary for providing the idle mode can be transmitted and received between base stations belonging to different paging groups through a backbone message.

  FIG. 2 is a process flow diagram illustrating an idle mode procedure according to one embodiment of the present invention.

  Referring to FIG. 2, the mobile station requests the base station to switch to the idle mode using a request message such as DREG_REQ, which is one of the existing MAC messages, in order to switch to the idle mode (S21). The format of the DERG_REQ message is as shown in Table 2.

  For example, the mobile station can request to switch 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.

  The base station having received the DERG_REQ message responds to the request from the mobile station through a command message such as an existing DREG_CMD message (S22). The format of the DREG_CMD message is as shown in Table 3.

  The base station can allow the switch to the idle mode through the action code (Action Code) of the DREG_CMD message (Action Code = 0x05). It is also possible to request switching to the idle mode again after a certain time (Action Code = 0x06). Further, it is possible not to request further switching to the idle mode until the device itself transfers DREG_CMD (Action Code = 0x07).

  The detailed contents of the action code of the DREG_CMD message are described in Table 4 above.

  According to one embodiment, base stations belonging to the same paging group can share information for mobile stations switched to idle mode. Through this information, it is possible to inform the procedure that the mobile station must perform every paging cycle.

  For this purpose, the paging-announce backbone message shown in Table 5 is used. The paging guidance backbone message is transmitted to all base stations belonging to the same paging group (S23).

  In another embodiment, an action code (Action Code) for clearly indicating a necessary action for a mobile station in an idle mode is added to the paging guidance backbone message.

  Accordingly, in the fields of the paging guidance backbone message shown in Table 5, Num MSS, MSS MAC address, PAGING CYCLE, and PAGING OFFSET are changed as shown in Table 7 below.

他の実施例によると、表７に示すように、従来のＰＡＧＩＮＧ＿ＣＹＣＬＥ（１６ｂｉｔ）とＰＡＧＩＮＧ＿ＯＦＦＳＥＴ（８ｂｉｔ）は除去できる。これは、同じページング領域に属する基地局はいずれも同じページング周期とページングオフセットを持つためである。

According to another embodiment, as shown in Table 7, the conventional PAGING_CYCLE (16 bits) and PAGING_OFFSET (8 bits) can be removed. This is because all base stations belonging to the same paging area have the same paging cycle and paging offset.

  Instead, an action code (for example, a 3-bit action code) is added to the paging guidance backbone message, and the MAC address of the specific mobile station is added to the paging list (Action Code = 0). In addition, the MAC address of the specific mobile station is removed from the paging list (Action Code = 1). In addition, ranging is performed for updating the position information (Action Code = 2). Further, it is possible to explicitly indicate that the idle mode is terminated and the re-registration procedure is performed again on the network (Action Code = 3).

  Table 6 shows the format of the paging message MOB-PAG_ADV that is transmitted through the paging to the mobile station in which each base station is in the idle mode in an exemplary format of the paging message. The paging message is preferably transmitted to a mobile station in a broadcast form.

  The mobile station that has received the paging message can determine whether it can continuously maintain the idle mode from the action code (for example, a 2-bit action code) (Action Code = 00), or perform ranging ( ranging) (Action Code = 01) or whether the idle mode has to be terminated in order to receive downlink traffic that must be transmitted to itself (Action Code = 10).

  A base station that allows a mobile station to switch to the idle mode sets the action code of the paging guidance backbone message to 0 and transfers it to all base stations included in the same paging area as the mobile station (S23). The base station that has received the paging guidance backbone message stores the MAC address of the corresponding mobile station in its paging list and transfers it through the paging message MOB-PAG_ADV at every paging cycle (S24).

  The fact that the mobile station is able to receive the paging message alone indicates that it can continue to maintain the idle mode, so it must re-register with the mobile station that needs some action, i.e. the network. In addition, waste of radio resources can be prevented by including only the MAC address of the mobile station that has to perform ranging for updating location information. Therefore, it is preferable to change the 'MSS MAC Address hash' and 'Action Code' field portions of the paging message MOB-PAG_ADV shown in Table 6 as shown in Table 8 below.

移動局に伝達しなければならない下りトラフィックがあり、移動局が遊休モードを終了するようにする必要がある場合、基地局は、該当の移動局が現在ページング領域のどの基地局の領域にあるかがわからない。したがって、該当の基地局は、変更されたページング案内バックボーンメッセージのアクションコードを３に設定して、自身と同じページング領域における全ての基地局に伝達する。

If there is downlink traffic that must be transmitted to the mobile station and the mobile station needs to exit idle mode, the base station determines which base station is currently in the paging area for the mobile station. I don't know. Accordingly, the corresponding base station sets the action code of the changed paging guidance backbone message to 3 and transmits it to all base stations in the same paging area as itself.

  The base station that has received the paging guidance backbone message sets the action code of the paging message to 00 and broadcasts it to all mobile stations, so that the corresponding mobile station exits the idle mode, and re-registers with the network. Can be made to do the procedure.

  After the mobile station has successfully exited idle mode, the base station then communicates to all base stations in the paging area by setting the action code of the modified paging guidance backbone message to 1 and then It is possible to prevent paging for the mobile station.

  FIG. 3 is a process flow diagram illustrating a procedure for ending idle mode when there is downlink traffic that must be transmitted to a mobile station in idle mode according to an embodiment of the present invention.

  Referring to FIG. 3, each base station does not know in which base station the mobile station that is in the idle mode is located, so the downlink traffic is unconditionally requested for the first time that the corresponding mobile station switches to the idle mode. Is transmitted to the first base station (first base station).

  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 (S31).

  All the base stations that have received the paging guidance message set the action code of the paging message MOV_PAG_ADV to 10 for all the mobile stations in their area and transfer them to the broadcasting form (S32).

  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 (S33). 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 transferred between the base stations in a wired manner to 1 so that the first base station searches for it. The mobile station is notified that it is in its own area (S34). The format of the MSS_Info_Request backbone message is as shown in Table 9 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ことを知らせる。

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

  The first base station also preferably forwards the mobile station traffic received so far through a data transfer message having a format as shown in Table 10.

移動局に伝達しなければならない下りトラフィックがあり、移動局が遊休モードを終了するようにする必要がある場合を除いて移動局の遊休モードを終了する必要がある場合では、基地局がページングを通じて移動局が遊休モードを終了するように要請する前に、移動局が先に遊休モードを終了する手順を行う。

If there is downstream traffic that must be transmitted to the mobile station and the mobile station needs to exit idle mode unless it is required to exit idle mode, Before the mobile station requests to end the idle mode, the mobile station first performs a procedure to end the idle mode.

  The base station that received the request to end the idle mode from the mobile station and re-register with the network sets the action code of the paging guidance backbone message to 1 for all base stations belonging to the same paging area as itself. By transmitting, the corresponding mobile station is removed from the paging inventory.

  FIG. 4 is a block diagram illustrating a broadband wireless access system including a paging controller according to an embodiment of the present invention.

  Referring to FIG. 4, the paging controller transmits / receives information necessary for idle mode support to / from a base station belonging to at least one paging group, so that the idle mode for mobile stations in each base station area is transmitted via the base station. Take control. That is, information necessary for providing the idle mode can be transmitted / received between the base stations via the paging controller. The paging controller may be provided in a specific base station or may be provided separately from the base station.

  FIG. 5 is a process flowchart illustrating a procedure for managing base stations belonging to a paging group in a broadband wireless access system including a paging controller according to an embodiment of the present invention.

  As shown in FIG. 5, the paging controller can control base stations belonging to each paging group using a backbone message. For example, a paging group action request (Paging group action request) is used to assign a paging group to a base station using an action code of a backbone message (Action Code = 0000), and is removed from a specific paging group (Action Code = 0001). The paging information of the corresponding base station is requested (Action Code = 0010), or the paging information of another base station can be notified (Action Code = 0011) (S51). Table 11 shows an example of the paging group operation request message.

基地局は、基地局によってページング制御機に伝達されるページンググループ動作応答（Ｐａｇｉｎｇ−ｇｒｏｕｐ−ａｃｔｉｏｎ ｒｅｓｐｏｎｓｅ）メッセージのアクションコードを用いて、遊休モード提供に必要な情報を転送できる（Ｓ５２）。例えば、ページング制御機がページンググループに対して追加または除去するために転送したページンググループ動作要請メッセージに対する応答を転送でき（Ａｃｔｉｏｎ Ｃｏｄｅ＝００００）、自身のページング情報を提供するか（Ａｃｔｉｏｎ Ｃｏｄｅ＝０００１）、他の基地局のページング情報を要請できる（Ａｃｔｉｏｎ Ｃｏｄｅ＝００１０）。表１２に、ページンググループ動作応答メッセージの一例を示す。

The base station can transfer information necessary for providing the idle mode using an action code of a paging group operation response message transmitted to the paging controller by the base station (S52). For example, a response to a paging group operation request message transferred by the paging controller for addition or removal from the paging group can be transferred (Action Code = 0000), and its own paging information can be provided (Action Code = 0001). The paging information of other base stations can be requested (Action Code = 0010). Table 12 shows an example of the paging group operation response message.

図６は、本発明の一実施例によるページング制御機が備えられた広帯域無線接続システムで、遊休モード開始手順（Ｉｄｌｅ Ｍｏｄｅ Ｉｎｉｔｉａｔｉｏｎ Ｐｒｏｃｅｄｕｒｅ）を示す処理流れ図である。

FIG. 6 is a process flow diagram illustrating an idle mode initiation procedure in a broadband wireless access system including a paging controller according to an embodiment of the present invention.

  As shown in FIG. 6, when a mobile station (MSS) tries to switch to an idle mode, the idle mode switch is performed by transferring an idle mode switch request DREG-REQ message to the base station to which the mobile station belongs. Request (S61). The DREG-REQ message includes information for requesting deregistration from a base station to which the DREG-REQ message belongs (De-registration Request Code) and TLV encoded information (eg, paging cycle request TLV, idle mode maintenance information TLV, MAC hash omission limit) Value TLV).

  The base station 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 that requests switching to the idle mode to the paging controller (S62). Table 13 shows an example of the idle mode information request message.

表１３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に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 13, the idle mode information request message includes information that a 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). Mode maintenance information TLV, MAC hash omission limit value TLV).

  The paging controller that has received the idle mode information request message transfers an idle mode information response idle-info-RSP message to the base station that has transferred the idle mode information request message (S63). At this time, if the idle mode information request message transferred from the base station includes information related to the MAC hash omission limit value, the paging controller responds to the idle mode information response to all base stations belonging to the paging group. The message is transferred (S65).

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

表１４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、ページング制御機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 14, the idle mode information response Idle-Info-RSP message includes information notifying 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 base station that has received the idle mode information response Idle-Info-RSP message transfers the idle mode instruction message DREG-CMD to the mobile station that has requested the idle mode switching (S64). 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.

  FIG. 7 is a process flow diagram illustrating a case where traffic occurs in an idle mode mobile station in a broadband wireless access system including a paging controller according to an embodiment of the present invention.

  As shown in FIG. 7, the mobile station switches to an idle mode state (S71 to S74). A mobile station in the idle mode can remain in the base station area that has been switched to the idle mode or can move to another base station area. In the present embodiment, an example will be described in which the mobile station moves from the idle mode state to the second base station region.

  When downlink traffic occurs in the idle mode state, the base station to which the mobile station belonged (hereinafter referred to as the first base station) when the idle mode is switched indicates that downlink traffic has occurred in the mobile station in the idle mode state. The information to be notified is transferred to the paging controller (S75). The paging controller sends a paging-announce message to all the base stations existing in the paging area to notify that the mobile station in the idle mode ends the idle mode and reenters the network. Transfer (S76 to S77). Accordingly, the base station broadcasts a paging advertisement message (MOB_PAG-ADV). An example of this paging advertisement message is shown in Table 6 above.

  Table 15 shows an example of the paging guidance message.

遊休モード状態で、第２基地局の領域へ移動した移動局は、ページング領域に一定周期ごとに放送されるページング広告メッセージ（ＭＯＢ＿ＰＡＧ−ＡＤＶ）を通じて、自身に下りトラフィックが発生したことを認識し、ネットワークに再進入するためのレインジング要請メッセージを第２基地局に転送する（Ｓ７８）。第２基地局は、ページング制御機に遊休モード情報要請メッセージを用いて、移動局がページングに応答したことを知らせ、遊休モード切り替え以前の移動局セッション情報を要請する（Ｓ７９）。ページング制御機は、移動局のセッション情報及び移動局が遊休モードに切り替える当時に移動局が位置していた基地局に関する情報を含む遊休モード情報応答メッセージを、第２基地局に転送する（Ｓ８０）。

In the idle mode state, the mobile station that has moved to the second base station area recognizes that downlink traffic has occurred through a paging advertisement message (MOB_PAG-ADV) broadcast in the paging area at regular intervals, A ranging request message for re-entering the network is transferred to the second base station (S78). The second base station uses the idle mode information request message to inform the paging controller that the mobile station has responded to the paging, and requests the mobile station session information before switching to the idle mode (S79). The paging controller transfers an idle mode information response message including the session information of the mobile station and information on the base station where the mobile station was located when the mobile station switched to the idle mode to the second base station (S80). .

  The second base station transfers a ranging response message including a handover optimization flag to the mobile station based on the mobile station session information and idle mode maintenance information transferred by the paging controller (S81). When the mobile station performs the network re-entry process (S82), the second base station in charge of the area where the current mobile station is located uses the idle mode information request message to confirm that the mobile station has re-entered the network. The paging controller is informed (S83). At this time, the second base station can include a handover optimization flag included in the ranging response message.

  The paging controller recognizes that the mobile station has re-entered the network in the second base station area after switching to the idle mode at the first base station, and uses the idle mode information response message to the first base station. An instruction is given to transfer the transmitted traffic to the mobile station through the second base station (S84).

  The first base station transmits traffic to the second base station according to the instruction of the paging controller, and the second base station transfers traffic to the mobile station (S85). The paging controller informs all base stations belonging to the paging group that the mobile station has ended the idle mode using the idle mode information response message (S86). Each base station that has received the idle mode information response message from the paging controller removes the MAC address of the mobile station from the idle mode mobile station list.

  In one embodiment, when the downlink traffic to be transmitted to the mobile station in the idle mode is transmitted via the paging controller, the steps S75 or S84 may be omitted.

  In another embodiment, a method for supporting a mobile station in an idle mode in a wireless communication system using a paging controller includes a step of the mobile station entering the idle mode. Including. Also, from at least one of a plurality of base stations belonging to the same paging group, a response to a paging announcement transferred from the paging controller is generated from at least one of the plurality of base stations, While the mobile station is in an idle mode, ranging is performed to check availability of the mobile station regarding at least one of a plurality of base stations included in the paging group. Receiving a paging command including a paging command action code associated with the paging command action code. Also, a plurality of base stations belonging to the same paging group receive an idle mode end state from the paging controller, the mobile station exits the idle mode (exit), and the base station Including setting up a connection with one.

  The paging announcement may be generated from the paging controller when there is downlink traffic data to be transmitted to the mobile station. Also, the paging announcement is preferably generated from the paging controller when there is uplink traffic data from the mobile station. Preferably, the idle mode response command word may include at least one of a paging identifier, a paging cycle, and a paging cycle offset. Exiting the idle mode and setting up a connection preferably includes transmitting a ranging request to one of the plurality of base stations associated with the mobile station; Receiving a ranging response from one of the plurality of base stations.

  The paging announcement preferably (1) adds the mobile station to a paging list; (2) removes the mobile station from the paging list; (3) performs ranging to establish a position; And (4) a paging announcement action code including at least one of the network ingresses. The paging command action code may preferably include at least one of (1) network entry; and (2) ranging performance to establish a location.

  Preferably, the idle mode entry step further includes requesting a serving base station associated with a paging controller that controls a plurality of base stations associated with the paging group to enter the idle mode. be able to. The idle mode entry step may further include receiving an idle mode response command for entering the idle mode from the serving base station.

  Preferably, the paging controller may be identified by a paging controller identifier, and the mobile station may be identified by a MAC (medium access controller) identifier. The paging command word may preferably include information for identifying the mobile station using the MAC identifier. The paging guidance may preferably include information for identifying the mobile station using the MAC identifier. Preferably, the idle mode entering step by the mobile station further includes a step in which the paging controller informs a plurality of base stations belonging to the paging group of an idle mode entering status of the mobile station. be able to.

  As another embodiment, a method of supporting an idle mode by a network in a wireless communication system using a paging controller is controlled from a mobile station to enter the idle mode. The apparatus includes receiving a request to a serving base station associated with a paging controller that controls a plurality of base stations belonging to a paging group. Also, the method includes a step of transferring an idle mode response command for entering the idle mode from the serving base station to the mobile station. Also, from at least one of a plurality of base stations belonging to the same paging group, a response to the paging guidance transferred from the paging controller is generated from at least one of the plurality of base stations, and the mobile station Paging associated with performing ranging to check availability of the mobile station for at least one of a plurality of base stations included in the paging group while in idle mode The method includes the step of transferring a paging command including a commanding action code. Also, the method includes establishing a connection between one of the plurality of base stations and the mobile station. The method further includes a step of transferring an idle mode exit status from the paging controller to a plurality of base stations belonging to the same paging group.

  Preferably, the method may further include transferring an idle mode information request message from the serving base station to the paging controller in order to provide information corresponding to the mobile station. . Preferably, the paging controller receives the idle mode information request message from the serving base station, and the idle mode information request message corresponds to a MAC access controller hash skip threshold. When the information is included, the method may further include transferring an idle mode information response message from the paging controller to at least one of the plurality of base stations.

  Preferably, the paging controller receives the idle mode information request message from the serving base station, and sends an idle mode information response message from the paging controller to the serving base station. And transferring. The idle mode information response message is preferably forwarded to at least one of the plurality of base stations to inform at least one of the plurality of base stations that the mobile station has exited the idle mode. Information can be included. Preferably, the method may further include a step of transferring an idle mode command message from the serving base station to the mobile station as a response to the idle mode information response message.

  According to the present invention, each base station can include an operation of a terminal in which each base station is in an idle mode through paging using a paging guidance backbone message. The paging guidance backbone message may be transmitted in a wired manner between base stations through paging. Therefore, the present invention can innovatively reduce the size of the paging message (MOB-PAG_ADV) that should be accurately transmitted to all terminals in which the terminal is in the idle mode. In addition, the present invention has an effect that the idle mode can be supported more efficiently using the paging controller in the broadband wireless access system including 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 block diagram which shows the paging group by one Example of this invention. 5 is a process flowchart illustrating an idle mode procedure according to an embodiment of the present invention. 6 is a process flow diagram illustrating a procedure for ending idle mode when downlink traffic to be transmitted to a mobile station in idle mode occurs according to an embodiment of the present invention. 1 is a configuration diagram illustrating a broadband wireless access system including a paging controller according to an embodiment of the present invention. 3 is a process flowchart illustrating a procedure for managing base stations belonging to a paging group in a broadband wireless access system including a paging controller according to an embodiment of the present invention. 5 is a process flowchart illustrating an idle mode initiation procedure in a broadband wireless access system including a paging controller according to an embodiment of the present invention. 5 is a process flow diagram illustrating a case where traffic occurs in an idle mode mobile station in a broadband wireless access system including a paging controller according to an embodiment of the present invention.

Claims (25)

A method for supporting a mobile station in idle mode in a wireless communication system using a paging controller,
The method
And that the mobile station enters the idle mode,
From at least one base station of the plurality of base stations in the pair over managing group comprising: receiving a paging message, the paging message while the mobile station is in the idle mode performs the RNG includes a paging message action code associated with it, the paging message is generated from the at least one base station of said plurality of base stations in response to the paging information, the paging information, the paging controller Including the paging guidance action code set by
The exit idle mode, the method comprising: setting a connection between one base station of said plurality of base stations, the paging controller, the said mobile station has finished the idle mode informing the plurality of base stations in the paging group, and a possible method. In the paging proposal, the case where the mobile station has downlink traffic data to be transmitted, process towards wherein is produced, in claim 1 from the paging controller. In the paging proposed, when there is uplink traffic data from the mobile station is generated from the paging controller, method who claim 1. Exit the idle mode, setting the connection,
And transferring the Ranging Solicitation to the one base station of said plurality of base stations associated with the mobile station,
Further comprising a plurality of said one base station of the base station and receiving a ranging response, methods who claim 1. In the paging proposed, (1) add the mobile station to the paging list; (2) removing the mobile station from the paging list; (3) a ranging performed in order to establish the position; and, (4) network including paging guiding action code comprising at least one of the entry, methods who claim 1. The paging message action code is (1) network entry; and, (2) position at least one of a ranging performed in order to establish, methods who according to claim 1. The paging controller is identified with a paging controller identifier, the mobile station is identified by the MAC (medium access controller) identifier, method who claim 1. The paging message comprising said information for identifying said mobile station by using the MAC identifier, method who claim 7. The paging guide includes information identifying the mobile station using the MAC identifier, method who claim 7. Wherein the step of the mobile station enters the idle mode further comprises the paging controller informs the idle mode entry state before Symbol mobile station to the plurality of base stations in the paging group, according to claim 1 method towards. Means for the mobile station to enter idle mode;
And means for receiving a paging message from at least one of the base stations of the plurality of base stations in the pair over managing group, the paging message while the mobile station is in the idle mode, a ranging includes a paging message action code associated with performing the said paging message, said one of said plurality of base stations in response to the paging information is generated from at least one base station, the paging guide, paging control Means including a paging guidance action code set by the machine;
The exit idle mode, and means for setting a connection between one base station of said plurality of base stations, the paging controller is that the mobile station has terminated the idle mode the informing the plurality of base stations in the paging group, and means, the mobile station. Means for exit the idle mode, sets the concatenation,
And means for transferring a ranging Solicitation to the one base station of said plurality of base stations associated with the mobile station,
And means for receiving a ranging response from the one base station of said plurality of base stations, the mobile station according to claim 11. The paging message action code is (1) network entry; and at least one of a ranging performed in order to establish (2) position, the mobile station according to claim 11. The paging controller is identified with a paging controller identifier, the mobile station is identified by the MAC (medium access controller) ID, the mobile station according to claim 11. Means for the mobile station enters the idle mode, the plurality of base stations in the paging group, further comprising a paging controller informing an idle mode entering status of the mobile station, according to claim 11 Mobile station. A method for supporting an idle mode by a network in a wireless communication system using a paging controller,
The method
Receiving a request from a mobile station to enter an idle mode by a serving base station , wherein the serving base station is associated with a paging controller, and the paging controller is associated with a plurality of paging groups. controlling the base station, and that,
And it is transferred in response to a request for entering the idle mode, the idle mode response command, to the mobile station from the serving base station,
From at least one base station of the plurality of base stations in the pair over managing groups be to forward the paging message, the paging message while the mobile station is in the idle mode performs the RNG includes a paging message action code associated with it, the paging message is generated from the at least one base station of said plurality of base stations in response to the paging information, the paging information, the paging controller Including the paging guidance action code set by
Setting a connection between one of the plurality of base stations and the mobile station ;
It said mobile station comprises and forwarding said paging controller or Ra遊 deactivation mode exit status that it has terminated the idle mode in order to inform the plurality of base stations in the paging group, Methods. In the paging proposed, if there is downlink traffic data to be transmitted to the mobile station, methods who according to the generated from the paging controller, according to claim 16. In the paging proposed, when there is uplink traffic data from the mobile station is generated from the paging controller, method who claim 16. Wherein in order to provide information corresponding the mobile station further includes transferring the idle mode information request message to the paging controller from a serving base station, method who claim 16. And receiving the idle mode information request message from the serving base station in the paging controller,
If the idle mode information request message includes information corresponding with MAC (medium access controller) hash skip limits, idle mode information response to the at least one base station among from the paging controller of the plurality of base stations further comprising and forwarding the message, method who claim 19. And receiving the idle mode information request message from the serving base station in the paging controller,
Further comprising a transferring the idle mode information response message to the serving base station from the paging controller, method who claim 19. The idle mode information response message, said one of said plurality of base stations are transferred to at least one base station, said one of the mobile station before Symbol plurality of base stations that it has terminated the idle mode at least including information for informing the one base station, method who claim 21. In the paging proposed, (1) add the mobile station to the paging list; (2) removing the mobile station from the paging list; (3) a ranging performed in order to establish the position; and, (4) network including paging guiding action code comprising at least one of the entry, methods who claim 16. The paging message action code is (1) network entry; and at least one of a ranging performed in order to establish (2) Position, methods who claim 16. The paging controller is identified with a paging controller identifier, the mobile station is identified by the MAC (medium access controller) identifier, method who claim 16.

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