MXPA06014983A

MXPA06014983A - A method of communicating data in a wireless mobile communication system.

Info

Publication number: MXPA06014983A
Application number: MXPA06014983A
Authority: MX
Inventors: Gi Seon Ryu; Yong Ho Kim; Ki Hyoung Cho
Original assignee: Lg Electronics Inc
Priority date: 2004-06-25
Filing date: 2005-06-25
Publication date: 2007-03-21
Also published as: JP2008503976A; JP4742100B2; IL180226A0; IL180226A

Abstract

A method of communicating data in a wireless communication system is disclosed.More specifically, a method discloses transmitting a request by a mobile subscriberstation (MSS) to a network entity via a de-registration request message requestingthe network entity to retain a preferred session information, and receivinga selected session information via a de-registration command response fromthe network entity.

Description

A METHOD FOR COMMUNICATING DATA IN A WIRELESS MOBILE COMMUNICATION SYSTEM Technical Field The present invention relates to a method for transmitting and receiving data, and more particularly, to a method for communicating data in a wireless mobile communication system.

Background Art In a broadband wireless access system, a mobile subscriber station (MSS) is allowed to enter idle mode to save energy. The MSS in the inactive mode does not need to perform transfer procedure when moving between base stations of the same search area. Normally, performing a transfer requires that the MSS transmit in the uplink direction during the idle mode. As a result of the MSS that does not have to transmit to the base station (BS), energy can be saved. An MSS is located in a search group, comprised of a plurality of base stations. The coverage area which is covered by the search group called the search area. The base stations of the search group in the search area share the same search cycle and search offset values.

The MSS transmits a request message to the BS requesting to enter inactive mode. The BS then sends a response message that grants the MSS to enter inactive mode. In the response message, the BS includes the identification of the search group, the value of the search cycle and the value of search displacement. The request can be made using a deregistration message (DREG-REQ). In response to the request, the BS provides a response message to grant the MSS to enter the inactive mode. The response message includes identification of the search group, search cycle and search offset of the BS. The response can be made using a deregistration command message (DREG-CMD). In addition, the BS provides an average access control (MAC) address of the MSS that enters the idle mode to other BSs of the hunt group such that the MSS can receive search messages during the idle mode. During idle mode, the BS broadcasts at specific time intervals (also referred to as a search cycle) a message, asking whether the MSS wants to remain in or end in idle mode or if the MSS has to perform the distance determination operation . At the same time, the BS can transmit a search message to notify the MSS that downlink data exists for the MSS. The inactive mode can be terminated by either the MSS or the BS. If the MSS has to transmit data in the uplink direction, the MSS may terminate the inactive mode at any time. On the other hand, if there is downlink traffic from the BS, the BS notifies the MSS to end the idle mode by a search message so that the MSS can receive data. Further, if the MSS in the idle mode does not receive the BS search message in the specific time intervals or search cycles for various reasons, such as when switching to another search area, the MSS terminates the sleep mode. Here, the MSS in idle mode can roam freely within the limit of the search area without having to perform transfer as long as the MSS does not have to receive downlink traffic and / or transmit data in the uplink direction. The MSS terminates the idle mode and re-registers / re-enters the network and receives the downlink data if it is notified by a search message that the downlink traffic exists from the BS. In addition, as part of performing the distance determination operation, the MSS causes the BS to update the location of the MSS and a list of MSS information is effective. On the other hand, if the MSS receives a command through a search message to not perform any operation, the MSS remains in the inactive mode. However, if the MSS has to transmit data in the uplink direction or if the MSS is changed to a different search area, the BS in the search group notifies other BSs in the search group that the MSS is already it is not in the same search area, therefore deleting the corresponding MSS from the list of MSS in the inactive mode. If the MSS is switched to another search area or needs to transmit the surges to the BS during the inactive mode, the corresponding MSS terminates the inactive mode and has to register with the new BS of the new search group. In the registry with the new BS, the MSS has to go through the registration process from the beginning-the same registration process as the initial registration process in the previous network. Therefore, the MSS spends a lot of energy to register with the new network, and at the same time, a lot of time is spent to go through the registration process. In addition, if the MSS wishes to retain the inactive mode information of the previous search group after switching to a new search group, the MSS has to request the inactive mode via a MAC control message after registering with the new network. After this, the BS of the new search group provides a response to the request of the inactive mode. Again, such a procedure causes an increase in MAC signaling, thereby increasing the use of energy. Figure 1 illustrates the MSS terminating the idle mode and returning to the normal mode to receive the downlink traffic. Here, the MSS entered inactive mode by a request made by the MSS to enter inactive mode. Furthermore, even if the MSS entered inactive mode by a BS command, the MSS terminates the idle mode and returns to the normal mode to receive the downlink traffic. With reference to Figure 1, the MSS is deregistered with a BS (central BS1-BS) by the DREG-REQ and DREG-CMD (SIO). After the MSS enters inactive mode, the central BS notifies other BSs in the same search group by means of the search announcement that the MSS has entered the inactive mode (Sil). In the search announcement, the central BS includes a media access control (MAC) address of the MSS. Each BS that receives the search announcement is registered with the MAC address of the MSS in its search list. This search list is shared by all BS in the search area. While in the idle mode, the data can be sent to the MSS. To receive this data, the MSS must exit the inactive mode. Therefore, when there is downlink traffic, the central BS transmits a search announcement to notify all BSs in the search group that the data has to be distributed to the MSS (S12). Accordingly, each BS transmits a search message to the MSS using the MAC address provided from the central BS during the search intervals (S13). The MSS receives the search message from each of the BS of the hunt group. If an Action Code received from one of the BS, ie BS # 3, is set to "10", which indicates the initial network entry, the MSS performs the distance determination operation and the network entry procedures initial with BS # 3 (S14 and S15). Here, the distance determination operation includes a distance determination request message (RNG-REQ) of the MSS and a distance determination response message (RNG-RSP) of the BS. After the MSS obtains the initial network entry, the BS # 3 transmits the downlink data to the MSS (Slß). Saving energy is not limited to inactive mode. As another means to save energy in addition to the idle mode, the MSS can enter the idle mode to save energy. In order for the MSS to enter idle mode, the MSS transmits a request to enter the idle mode by means of a sleep request message (MOB-SLP-REQ) to the BS. The BS then sends a reply message which grants the MSS to enter the idle mode by means of a standby response message (MOB-SLP-RSP). The messages of MOB-SLP-REQ and MOB-SLP-RSP include varied information such as the start time of the idle mode, the maximum / minimum resting interval (in frames), and listening intervals. At the end of the idle interval, the BS transmits a traffic indication message (MOB-TRF-IND) to notify the MSS of whether there is any downlink traffic. If there is no downlink traffic for the MSS to receive, the MSS can return to idle mode. However, if there is downlink data, the MSS returns to normal mode to receive the downlink data. Figure 2 illustrates the MSS that terminates the idle mode and returns to the normal mode to receive the downlink traffic. Here, the MSS entered the idle mode by a request made by the MSS to enter the idle mode. Furthermore, even if the MSS entered inactive mode by a BS command, the MSS terminates the idle mode and returns to the normal mode to receive the downlink traffic. With reference to Figure 2, the MSS transmits a request to enter the idle mode by the message of MOB-SLP-REQ to the BS (S2-0). In response, the BS transmits the message from MOB-SLP-RSP to the MSS (S2-1). In the MOB-SLP-RSP message, information such as the start time of the idle mode (M), the maximum / minimum idle interval (N1, N2), and the listening interval (Ll) are included. The MSS enters the idle mode according to the minimum idle interval (NI) set in S20 and S21, and the BS transmits the message of MOB-TRF-IND during the listener interval Ll (S2-2). Although the message of MOB-TRF-IND is the one that the BS indicates to the MSS if there is some data to receive for MSS (negative / positive). In addition, the MSS listens to or operates from idle mode during Ll to check if there are any downlink data. If there is no downlink data, which is indicated by the 'negative indication', the MSS returns to idle mode. However, after a listening interval, the idle interval or the idle window size are duplicated according to a programmed idle window establishment method. If the BS receives data to transmit to the MSS during the idle interval, the BS stores the data in a specific storage space and waits until the next listening interval, at which time the MSS of the data is notified by the message of MOB-TRF-IND (S2-3). After this, the MSS goes into stand-by mode and returns to normal mode to receive the data (S2-4). In normal mode, if a packet (data) of the internet protocol (IP) is received by the MSS, a router transmits the IP packet to the MSS via a base station. In version 4 of IP (IPv4), the router uses an ARP, and in version 6 of IP (IPv6), the router uses neighbor finding (ND). In other words, when the IP packet is transmitted to the MSS, the router uses the ARP and ND protocols to find a target link layer address (e.g., MAC address or Ethernet address) that corresponds to the address IP of the MSS. The ARP is the IPv4 protocol which is used when the IP address is changed to the link layer address, such as the MAC address or Ethernet address. In addition, the ND protocol is the IPv6 address used to determine the link layer addresses of the neighboring links. The address change occurs at the time when the IP packet header and the link layer address header are generated. As such, the address change occurs only in the IP packet produced. Traditionally, it is not clearly specified as to how the BS transmits or disseminates the request or application neighboring the MSS. More specifically, the specific role or operation by the BS has not been clearly defined to transmit the request / request neighboring the MSS during the normal mode. In addition, the MSS in idle mode or inactive mode only receives a signal in specific cycles / intervals. As a result, if the router has to transmit received data to the MSS, a problem arises when the MSS is in idle mode or inactive mode since the MSS can not respond to the ARP request or neighbor request until the scheduled time. Consequently, the target MSS can not send a response, which results in distribution failure. Based on the problem, the MSS may not receive the data. As discussed in the above, the problem exists in distributing the data to the MSS from the router. Especially, since in the idle mode or idle power saving mode of the MSS, the data received in the router can not be received by the MSS since the MSS can not receive until specific times. Therefore, the data is not always transmitted to the MSS.

Description of the Invention Accordingly, the present invention is directed to a method for communicating data in a wireless broadband communication system that substantially obviates one or more problems due to limitations and disadvantages of the related art.

An object of the present invention is to provide a method for communicating data between the MSS and a network entity to enter the idle mode, update the location during the idle mode, and re-enter the network after the idle mode. Additional advantages, objects and features of the invention will be set forth in part in the description that follows and in part will become apparent to those of ordinary skill in the art upon examination of the following or can be learned from the practice of the invention . The objects and other advantages of the invention can be realized and obtained by the structure particularly indicated in the written description and the claims thereof as well as the attached drawings. To achieve these objects and other advantages and in accordance with the purpose of the invention, as widely represented and described herein, a method for communicating data to enter inactive mode includes the MSS transmitting an application through a mobile subscriber station (MSS) to a network entity by means of a deregistration request message requesting the network entity to retain a preferred session information, and receive a selected session information by means of a deregistration command response of the network entity. In another aspect of the present invention, a method for updating the location of the MSS that includes transmitting a request to a second network entity by means of a distance determination request message requesting an update of the location of the MSS of a first entity network, receive a selected session information to be updated by a reply message from the second network entity, and perform the network entry procedure to update the session information after the location of the MSS is updated from the first network entity to the second network entity. In another aspect of the present invention, a method for entering the network after the inactive mode. More specifically, the method includes transmitting a request to a second network entity by means of a distance determination request message, receiving a selected session information by means of a distance determination response message of a second network entity, where the information of the selected session is received by the second network entity from a first network entity, and enters a network of the second network entity. In another aspect of the present invention, a method that requests a network entity to retain the network address of the MSS is entered. The process includes transmitting to a first network entity a request to retain a network address by means of a request message, enter inactive mode after receiving a reply message from the first network entity, receive a search message from a second network entity during idle mode, enter a network of the second network entity, and receive an internet protocol packet (IP) from the second network entity. In another aspect of the present invention, a method that requests a network entity to retain the convergence sub-layer information is entered. The process includes transmitting by means of a request message a request to a first network entity to retain a convergence sub-layer (CS) information, enter the inactive mode after receiving a reply message from the first network entity, receive a search message of a second network entity during the idle mode, entering the network of the second network, and receiving a data packet of the second network entity. It will be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide a further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated into and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention. invention. In the drawings; FIGURE 1 illustrates a mobile subscriber station (MSS) terminating the idle mode and returning to the normal mode to receive the downlink traffic; FIGURE 2 illustrates the MSS terminating the idle mode and returning to normal mode to receive the downlink traffic; FIGURE 3 illustrates a signaling process when MSS merges with downlink traffic during idle mode; FIGURE 4 illustrates a signaling process when the MSS requests to enter inactive mode and requests that the network entity retain the session information; FIGURE 5 illustrates a signaling process when the network entity instructs the MSS to enter the inactive mode, and the MSS requests that the network entity retain the session information; FIGURE 6 illustrates a signaling process of location update by the MSS from a search group to another search group; FIGURE 7 illustrates a process of acquiring link layer address of a router when the MSS voluntarily enters the idle mode; FIGURE 8 illustrates a process of acquiring link layer address of a router when the MSS enters the idle mode as a result of the command of the network entity; FIGURE 9 illustrates a process of acquiring link layer address of a router when the MSS voluntarily enters the inactive mode; FIGURE 10 illustrates a link layer address acquisition process of a router when the MSS enters the idle mode as a result of the command of the network entity; FIGURE 11 illustrates another embodiment of a link layer address acquisition process of a router when the MSS voluntarily enters the inactive mode; and FIGURE 12 illustrates a link layer address acquisition process of a router when the MSS enters the idle mode as a result of the command of the network entity.

BEST MODE FOR CARRYING OUT THE INVENTION Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts. When entering inactive mode, the MSS transmits the session information of the MSS to a network entity by means of a request message. The network entity may be a base station, search controller, access link port, or base station controller, for example. The session information is a list of session information of the MSS which prefers the MSS that retains the network entity. Particularly, a preferred session information of MSS refers to the services related to the re-entry of the network and the operational information to issue the additional network re-entry of the inactive mode. In addition, the request message includes a request by the MSS to enter inactive mode. For example, the request message is a deregistration request message (DREG-REQ). In addition, the request message includes the preferred session information that the MSS wishes the network entity to retain. More specifically, the session information includes information such as security information, Internet protocol (IP) address information, MSS capability, administration connection identification, and essential information to maintain the network service. After receiving the preferred session information (or list of session information), the network entity selects the session information which it decides to retain. After that, the network entity notifies the MSS by means of a response message of the session information selected by the network entity. The session information selected may be the same, different or combinations thereof of the preferred session information transmitted from the MSS. Again, the selected session information comprises a list of session information selected by the network entity to issue a re-entry of the future MSS of the idle mode by retaining a certain MSS service and operational information. In addition, the selected session information is used to ensure an effective and efficient service flow between the MSS and the network entity. In addition, the response message includes a response to the request by the MSS to enter inactive mode. For example, the request message is a deregistration command message (DREG-CMD). In the response message, the network entity includes the selected session information. During idle mode, if there is downlink traffic for the MSS, the network entity transmits a search message, and the selected session information is found in the search message, so that the MSS receives the downlink data . Normally, the search message can be transmitted periodically or at specific time intervals. After this, the network entities in the same search group share the selected session information with each other through a main network. As a result, when the MSS terminates the idle mode and re-enters the network, the MSS may deviate from some of the procedural steps required to re-enter the network. As explained previously, the retention of the session information selected by the network entity enables facilitated re-entry. The process steps include, for example, those steps that can be shared concurrently with other network entities such as the IP address and / or security information. In the case where the MSS is changed to another search group and requires a location update, a new network entity in another search group receives the session information selected from the network entity of the previous search group. The network entity of the previous search group is the network entity that retained the latest updated MSS session information. The new network entity of another search group then transmits the selected session information received from the previous search group to the MSS. Subsequently, when updating the location of the MSS, the MSS re-enters the new network in order to update the information. In brief, the location update of the MSS may take place in the environment based on search zone identification where the update occurs when the MSS is changed from a search zone identification to another search zone identification, for example. In addition, the location update of the MSS can take place based on time. In other words, the chronometer-based location update includes a program by which the MSS and the network perform the location update. For example, if a chronometer-based location update program is established every 10 seconds between the MSS and the network entity, the location of the MSS is updated every 10 seconds based on the previous location update regardless of whether it has been changed or not the MSS. When the MSS receives a plurality of search group identifications by the search message, the MSS requests a location update in the corresponding network entity. When updating the location, the MSS transmits to the network entity the identification of the network entity that granted the inactive entry in the previous search group and the identification of the search group of the search group that you want to allow the MSS remain in the inactive mode. After that, the corresponding network entity transmits the information, such as the identification of the search group, the search cycle value, and the search offset value, by means of the response message to the location update request, to allow the MSS remains in the inactive mode after switching to a different search group. The following Table 1 shows an example of the message parameter of the session information list of the MSS. [Table 1] The message parameter of Table 1 is included in the message in the TLV format, and the network registration procedure that can be derived when the inactive mode is terminated can be expressed in a bitmap format. In the embodiments of the present invention, such operation is indicated as "Setu? _flag of Facilitated Network". Figure 3 illustrates one embodiment of the present invention, with respect to a signaling process when MSS merges with downlink traffic during the idle mode. Figure 3 shows the procedures for the MSS to terminate the idle mode when there is downlink traffic. The MSS transmits a request message to a first network entity to request to enter inactive mode by means of a deregistration request message (DREG-REQ) (SIO). Included in the request message is a preferred MSS session information that the MSS prefers that the network entity retain for future re-entry provided to a network. As explained in the above, the network entity may be a base station, search controller, access gateway, or a base station controller, for example. This preferred session information of MSS includes information such as security information, Internet Protocol (IP) address information, MSS capability, management connection identification and essential information to maintain the network service. The preferred session information message may be in a format similar to that of Table 1. For explanation, the network entity, which received the preferred session information from the MSS, is identified as a first network entity. Also, a second network entity may be identified as a network entity that the MSS seeks to re-enter from the inactive mode. After receiving the request message, the first network entity broadcasts through the main channels a notification to at least one or all of the other network entities that have the same search identifications in the search group in such a way that the MSS can be added to each network entity in the search group (S20). After this, in response to the request message, the first network entity transmits selected session information to the corresponding MSS by means of a deregistration response command (DREG-CMD) (S30). Selected session information includes some useful MSS service and operational information to facilitate a re-entry of the future MSS network from idle mode. The session information selected may be a list of selected session information which may be the same, different or combination thereof as the preferred session information requested by the MSS. In addition, in the transmission of the DREQ-CMD, other information such as the search cycle, search offset and search identification may be included. The DREG-CMD is a command or message that grants the MSS to enter inactive mode when required. With the reception of the DREG-CMD of the first network entity, the MSS enters inactive mode. During the idle mode, the MSS may receive search messages in the specific time intervals or intervals of the first network entity (S40). The search message includes varied information such as if there is some downlink traffic or when the idle mode ends. During idle mode, it is possible for the MSS to switch to another network entity (after this "second network entity") in a hunt group that has the same identities of the hunt group or in a hunt group that has a plurality of identifications of the search group. If the MSS is changed to the second network entity within the same search group that has the same search identification (S50), the MSS receives the search messages from the second network entity in the same search and shift cycle. search that you received from the first network entity (S60). When the downlink traffic arrives at the first network entity, and the first network entity is notified of the downlink traffic in the MSS (S70), the first network entity transmits the session information together with the existence of the downlink traffic, through a main network to other network entities in the search group (S80). After receiving the selected session information of the first network entity, the second network entity transmits a search message, which includes the selected session information and the existence of downlink traffic, to the MSS (S90). The MSS then transmits the identification of the first network entity, which granted the MSS to enter the inactive mode, to the second network entity by means of a distance determination request (SlOO) message. Upon receipt of the identity of the first network entity, the second network entity notifies the first network entity that the MSS is located in its coverage area and requests the first entity to transmit the session information of the corresponding MSS retained by the first network entity (S110). The first network entity fulfills the request by transmitting the session information retained by the main channels (S120). In addition, the second network entity transmits to the MSS the list of session information currently retained by the second network entity by means of a distance determination response message (S130). As a result, when the MSS performs re-entry to the network, certain procedural steps required for re-entry to the network may be skipped. In other words, because the second network entity retains some MSS service and operational information, the same information is not required when re-entering the network. At the same time, the MSS receives via the distance determination response message the process steps that can be skipped by the MSS upon re-entry to the network. Based on the information provided from the second network entity, the procedure for entering or re-entering the network takes place (S140). The process steps of the network registration may include, for example, the MSS capability negotiation procedure, the security procedure, the registration procedure, the IP address acquisition procedure, to name a few. In addition, in order to establish the connection for the reception of data, the MSS carries out the necessary procedures together with the procedures for entering the network. After the procedures for network entry (or re-entry) and data reception are completed, the second network entity transmits the downlink data received from the first network to the MSS (S150). The stages (SIO-S150) describe the operation in the network when there is downlink traffic during the idle mode. If uplink traffic occurs in the MSS in idle mode, certain stages (S70, S80, S90, and S150) can be excluded from the operation. Figure 4 illustrates a signaling process when the MSS requests to enter inactive mode and requests that the network entity retain the session information. As another embodiment of the present invention, the processes involved in updating the location of the MSS in the inactive mode after the MSS is changed to the other group of search are described. With reference to Figure 4, the MSS transmits a request message to request that a first network entity enter inactive mode by means of a deregistration request message (DREG-REQ) (S210). Included in the request message is a preferred MSS session information that the MSS prefers to retain the network entity for future re-entry provided to a network. The network entity can be a BS or a search controller. As explained in the above, the network entity may be a base station, search controller, access link port, or a base station controller, for example. This preferred session information of MSS includes information such as security information, internet protocol (IP) address information, MSS capability, management connection identification and essential information to maintain the network service. The preferred session information message may be in a format similar to that of Table 1. As explained above, the identities of a first network entity and a second network entity are described with respect to Figure 3. After after receiving the request message, the first network entity broadcasts a notification to all other network entities having the same search identifications in the search group in such a way that the corresponding MSS can be added to each entity of network in the search group (S220). After that, in response to the request message, the first network entity transmits selected session information to the corresponding MSS by means of a deregistration response command (DREG-CMD) (S230). The selected session information includes a certain MSS service and useful operational information to facilitate a re-entry of the future MSS network from the inactive mode. The selected session information may be a list of selected session information which may be the same, different or a combination thereof as the preferred session information requested by the MSS. In addition, in the transmission of the DREQ-CMD, other information such as the search cycle, search offset, and search identification may be included. The DREG-CDM is a command or message that grants the MSS to enter inactive mode when requested. With the reception of the DREG-CDM of the first network entity, the MSS enters inactive mode. During the idle mode, the MSS may receive a search message at specific time intervals or intervals of the first network entity (S240). The search message includes diverse information such as if there is any downlink traffic or when the idle mode ends. During idle mode it is possible for the MSS to switch to another network entity (after this "second network entity") in a hunt group that has the same identities of the hunt group or in a hunt group that has a plurality of identifications of the search group. If the MSS is changed to the second network entity within the same search group that has the same search identification (S250), the MSS receives the search messages from the second network entity in the same search and shift cycle. search you received from the first network entity (S260). If the cellular coverage area is designed in such a way that a network entity can belong only to a search group, a network entity that is changed to a search group that has more than one identification of the search group refers to the network entity in transit between two search groups, for example. It is at this point that the MSS learns that the second network entity also belongs to a second search group that has different identification of the search group than that of the first search group. The second network entity transmits an identification of the search group corresponding to the search group to which it belongs by means of a search message. If the cell coverage area is designed in such a way that a network entity can belong only to a search group, it is possible to transmit a search group identification of a neighboring search group, for example. After receiving a search message having different identification of the search group, the MSS requests the location update of the second network entity by means of a distance determination request message (S270). In addition to the location update request, the search determination request message may include other information such as the identification of the first network entity, which granted the MSS to enter the inactive mode, the identification of the search group of a second search group, and a desired search cycle. If the cell coverage area is designed in such a way that a network identity can belong only to a search group, the MSS can receive the search message by means of previous search information when the MSS is changed to another search group, so that it is at this point that the MSS requests the location update in a new network entity, for example. The second network entity, after receiving an update request from the MSS, makes a request on the first network entity to transmit the currently selected session information retained by the first network entity (S280). The first network entity then transmits the currently selected session information held in the second network entity per request (S290). Even after the location of the MSS has been updated, the second network entity transmits the list of retained session information of the MSS by means of a distance determination response message (S300). Here in the distance determination response message, other information values such as the identification of a second search group and the corresponding search cycle and the search offset. As a result, the corresponding MSS is able to receive the search message according to the identification of the second search group. In addition, the second network entity transmits to the MSS the session information currently held by the second network entity by means of a distance determination message. As a result, when the MSS performs re-entry to the network, certain procedural steps required for re-entry to the network may be skipped. In other words, because the second network entity retains some MSS service and operational information, the same information is not required when re-entering the network. At the same time, the MSS receives via the distance determination response message the process steps that can be skipped by the MSS upon re-entry to the network. After receiving the retained session information of the first network entity by means of the distance determination response message, the MSS can execute the necessary network entry procedures in order to update information that is no longer effective or updated (S310). The second network entity uses a primary network to notify the other network entities of the first search group that the MSS has reassigned to a different search group and to deregister and delete information related to the MSS (S320). At the same time, the second network entity notifies the network entities of the second search group to add the information related to the MSS through the main network. As for the MSS, the MSS receives the search messages at specific intervals of the second search group and maintains the idle mode (S330).

As described above, if the location of the MSS is updated from a first network entity to a second network entity, the downlink data directed to the MSS is received by the second network entity, which has updated the location of the MSS and not the first network entity. Figure 5 illustrates a signaling process of another embodiment of the present invention. Here, downlink traffic exists in the environment where an MSS enters inactive mode as a result of a command by a network entity to the MSS to enter inactive mode by means of a deregistration command message (DREG-CMD). In this mode, the network entity instructs the MSS to enter inactive mode unlike the previous modalities where the MSS transmitted a request to the network entity to enter inactive mode. Here, the command to enter inactive mode is transmitted through the DREG-CMD message. The DREG-CMD includes an action code set to 0x05 and a required duration (REQ duration) that specifies the time for the MSS to enter inactive mode (S410). More specifically, a first network entity requests the MSS to transmit a preferred MSS session information via the DREG-CMD message. The DREG-REQ includes a specific time by or in which the MSS transmits the requested message. After reception of the DREG-CMD of the first network entity, the MSS transmits to the network entity the preferred session information of MSS requested at the specific time to the first network by means of a message a request message of deregistration (DREG -REQ) (S420). The preferred session information of MSS includes information such as security information, Internet Protocol (IP) address information, MSS capability, management connection identification and essential information to maintain the network service. The preferred session information of MSS is a list of session information that the MSS prefers to retain the network entity for future re-entry provided to a network. As explained in the above, the identities of a first network entity and a second network entity are described in the following with respect to Figure 3. After receiving the request message, the first network entity broadcasts via the channels A notification to all other network entities having the same search identifications in the search group is made so that the corresponding MSS can be added to each network entity in the search group (S430). After this, in response to the request message, the first network entity transmits selected session information to the corresponding MSS by means of the deregistration response command (DREG-CMD) (S440). Selected session information includes some MSS service and useful operational information to facilitate a re-entry of the future MSS network from the idle mode. The selected session information may be a list of selected session information that may be the same, different, or combination thereof as the preferred session information requested by the MSS. In addition, in the transmission of the DREQ-CMD, other information such as a search cycle, search offset, and search identification may be included. The DREG-CMD is a command or message that grants the MSS to enter inactive mode when required. With the reception of the DREG-CMD of the second network entity, the MSS enters inactive mode. During the idle mode, the MSS may receive a search message at specific time intervals or intervals of the first network entity (S450). The search message includes varied information such as if any downlink traffic existed or when the idle mode ended. During idle mode, it is possible for the MSS to switch to another network entity (after this "second network entity") in a hunt group that has the same identities of the hunt group or in a hunt group that has a plurality of identifications of the search group. If the MSS is changed to the second network entity within the same search group that has the same search id (S460), the MSS receives the search messages from the second network entity in the same search and search scrolling cycle that it received from the first network entity (S470). When the downlink traffic arrives at the first network entity, and the first network entity is notified of the downlink traffic on the MSS (S480), the first network entity transmits the session information together with the existence of the traffic Downlink via a main network to other network entities in the hunt group (S490). Here, the selected session information transmitted to other network entities in the search group via the main channels can be a list of selected session information. After receiving the selected session information of the first network entity, the second network entity transmits a search message, which includes the selected session information and the existence of the downlink traffic, to the MSS (S500). The MSS then transmits the identification of the first network entity, which granted the MSS to enter the inactive mode, in the second network entity by means of a distance determination request message (S510).

Upon receipt of the entity of the first network entity, the second network entity notifies the first network entity from the MSS that the MSS is located in its coverage area and requests the first entity to transmit the session information of the network entity. the corresponding MSS retained by the first network entity (S520). The first network entity complies with the request by transmitting the session information retained by the main channels (S530). In addition, the second network entity transmits to the MSS the list of session information currently retained by the second network entity by means of a distance determination response message (S540). As a result, when the MSS performs re-entry to the network, certain procedural steps required for re-entry to the network may be skipped. In other words, because the second network entity retains some MSS service and operational information, the same information is not required when re-entering the network. At the same time, the MSS receives via the distance determination response message the process steps that can be skipped by the MSS upon re-entry to the network. Based on the information provided from the second network entity, the procedure for entering or re-entering the network takes place (S550). The process steps of the network registration may include, for example, the MSS capability negotiation procedure, the security procedure, the registration procedure, the IP address acquisition procedure, to name a few. In addition, in order to establish the connection for the reception of data, the MSS carries out the necessary procedures together with the procedures for entering the network. After the procedures for network entry (or re-entry) and data reception have been completed, the second network entity transmits the downlink data received from the first network to the MSS (S560). The steps (S410-S560) describe the operation in the network when the downlink traffic exists during the idle mode. If uplink traffic occurs in the MSS in idle mode, certain stages (S480, S490, S500, and S560) can be excluded from the operation. Figure 6 illustrates a signaling process of another embodiment of the present invention. Here, downlink traffic exists in an environment where an MSS enters inactive mode as a result of a command by a network entity in the MSS to enter inactive mode by means of a deregistration command message (DREG-CMD). In addition, this mode describes the processes involved in updating the location of the MSS in the idle mode after the MSS is changed to another search group. In this mode, the network entity instructs the MSS to enter inactive mode unlike the previous modalities where the MSS transmitted a request to the network entity to enter inactive mode. Here, the command to enter inactive mode is transmitted through the DREG-CMD message. The DREG-CMD includes an action code set at 0x05 and a required duration (REQ duration) that specifies the time for the MSS to enter the inactive mode (S610). More specifically, a first network entity requests the MSS to transmit a preferred MSS session information via the DREG-CMD message. The DREG-REQ includes a specific time by or in which the MSS transmits the requested message. After reception of the DREG-CMD of the first network entity, the MSS transmits the preferred MSS session information requested at the specific time to the first network by means of a deregistration request message (DREG-REQ) to the network entity. ) (S620). The preferred session information of MSS includes information such as security information, Internet Protocol (IP) address information, MSS capability, management connection identification and essential information to maintain the network service. The preferred session information of MSS is a list of session information that the MSS prefers to retain the network entity for future re-entry provided to a network. As explained in the above, the identities of a first network entity and a second network entity are described in the following with respect to Figure 3. After receiving the request message, the first network entity broadcasts through the main channels a notification to all the other network entities having the same search identifications in the search group such that the corresponding MSS can be added to each network entity in the search group (S630). After this, in response to the request message, the first network entity transmits selected session information to the corresponding MSS by means of the deregistration response command (DREG-CMD) (S640). Selected session information includes some MSS service and useful operational information to facilitate a re-entry of the future MSS network from the idle mode. The selected session information may be a list of selected session information that may be the same, different, or combination thereof as the preferred session information requested by the MSS. In addition, in the transmission of the DREQ-CMD, other information such as a search cycle, search offset, and search identification may be included. The DREG-CMD is a command or message that grants the MSS to enter inactive mode when required. With the reception of the DREG-CMD of the second network entity, the MSS enters inactive mode. During the idle mode, the MSS may receive a search message at specific time intervals or intervals of the first network entity (S650). The search message includes varied information such as if there were any downlink traffic or when the idle mode ended. During idle mode, it is possible for the MSS to switch to another network entity (after this "second network entity") in a hunt group that has the same identities of the hunt group or in a hunt group that has a plurality of identifications of the search group. If the MSS is changed to the second network entity within the same search group that has the same search identification (S660), the MSS receives the search messages from the second network entity in the same search and shift cycle. search that you received from the first network entity (S670). If the cellular coverage area is designed in such a way that a network entity can belong only to a search group, a network entity that is changed to a search group that has more than one identification of the search group refers to the network entity in transit between two search groups, for example. It is at this point that the MSS learns that the second network entity also belongs to a second search group that has different identification of the search group than that of the first search group. The second network entity transmits an identification of the search group corresponding to the search group to which it belongs by means of a search message. If the cell coverage area is designed in such a way that a network entity can belong only to a search group, it is possible to transmit a search group identification of a neighboring search group, for example. After receiving a search message having different identification of the search group, the MSS requests the location update of the second network entity by means of a distance determination request message (S680). In addition to the location update request, the search determination request message may include other information such as the identification of the first network entity, which granted the MSS to enter the inactive mode, the identification of the search group of a second search group, and a desired search cycle. If the cell coverage area is designed in such a way that a network identity can belong only to a search group, the MSS can not receive the search message by means of previous search information when the MSS is changed to another search group, so that it is at this point that the MSS requests the location update in a new network entity, for example. The second network entity, after receiving an update request from the MSS, makes a request on the first network entity to transmit the currently selected session information held by the first network entity (S690). The first network entity then transmits the currently selected session information retained in the second network entity per request (S700). Even after the location of the MSS has been updated, the second network entity transmits the retained session information of the MSS by means of a distance determination response message (S710). Here in the distance determination response message, other information such as the identification of a second search group and the corresponding search cycle and the search offset values. As a result, the corresponding MSS is able to receive the search message according to the identification of the second search group. In addition, the second network entity transmits to the MSS the session information currently retained by the second network entity by means of a distance determination response message. As a result, when the MSS performs re-entry to the network, certain procedural steps required for re-entry to the network may be skipped. In other words, because the second network entity retains some MSS service and operational information, the same information is not required when re-entering the network. At the same time, the MSS receives via the distance determination response message the process steps that can be skipped by the MSS upon re-entry to the network. After receiving the retained session information from the second network entity by means of the distance determination response message, the MSS can execute the necessary network entry procedures to update the information no longer effective or updated (S720). The second network entity uses a primary network to notify the other network entities of the first search group that the MSS has reassigned to a different search group and to deregister and delete information related to the MSS (S730). At the same time, the second network entity notifies the network entities of the second search group to add the information related to the MSS through the main network. As for the MSS, the MSS receives the search messages at specific intervals of the second search group and maintains the idle mode (S740).

As described above, if the location of the MSS is updated from a first network entity to a second network entity, the downlink data directed to the MSS is received by the second network entity, which has updated the location of the MSS and not the first network entity. The above discussions refer to operations / procedures of the MSS and network entities to enter networks for the inactive mode, which include updating the session information to facilitate the re-entry of the MSS from the idle mode. The following discusses the operations of the MSS before entering inactive mode in order to effectively receive downlink traffic during idle mode. During normal mode, a router uses a destination or target IP address to find an MSS link layer address (for example, MAC address or Ethernet address) to be able to transmit data to the MSS. To accomplish this, the router sends an address request to the network entity. Here, in version 4 of the IP (IPv4), the router transmits the ARP request, and in version 6 of the IP (IPv6), the router transmits the neighboring request. In one embodiment of the present invention, after the network entity receives the address request message from the router, the network entity broadcasts to a plurality of MSSs or transmits the address request message to each MSS individually. After this, the network entity receives the response messages from the MSS, such as an ARP response message or neighboring advertising response message, and transmits the response message to the router. In the address request message, for example, the MAC address or the Ethernet address can be included. From the plurality of MSS who received the address request message, the MAC or Ethernet address of an MSS can match the MAC or Ethernet address included in the address request message. Then, the MSS having the correlated MAC address transmits a response message to the network entity via a secondary administration connection or a general data burst. Further, in one embodiment of the present invention, a network entity may transmit to a router a proxy ARP response message (or neighboring proxy publicity) of an MSS in idle / idle mode. In other words, the network entity can respond directly to a request by the router as an agent of the MSS, for example. For the network entity to respond to the router, the MSS includes its IP address in the MOB-SLP-REQ message or the DREG-REQ message and transmits to the network entity. In addition, the MSS provides its IP address to the network entity before entering the idle / idle mode when entering the idle / idle mode by the network entity. The embodiment of the present invention is not limited to IPv4 but can apply to IPv6 using neighbor finding protocol. In the embodiment of the present invention, the network entity uses a proxy ARP or discovery neighbor protocol to have the data transmitted in the network entity while the MSS is in idle or idle mode. As discussed previously, the network entity may be a base station, search controller, access link port, or a base station controller. In the figures, a base station (BS) is used as an example of a network entity to describe the modalities. In this modality, the network entity transmitted the ARP or messages related to the neighbor finding to the MSS. In the process, the data may not reach the destination MSS if the MSS is in idle idle mode. However, in this mode, the network entity can respond directly to the ARP request or neighboring request from the router. For this purpose, the network entity must possess the IP address and the link layer address (MAC address or Ethernet address) of the MSS.

To own the addresses, the network entity can acquire the MSS IP address and the link layer address when the MSS registers with the network entity to enter the idle mode or idle mode or when searching for the address set of MSS IP. More specifically, the network entity can acquire the IP address by receiving directly from the MSS the IP address when the MSS transmits the IP address by means of a request message. In addition, the network entity may acquire the network address by the MSS that the network entity requests to use the IP address currently held in the network entity. In other words, the MSS does not transmit an IP address and keeps its IP address retained in the network entity. The network entity can also acquire the information by making a direct request in the MSS for the IP and link layer addresses. Figure 7 illustrates a link layer address acquisition process of a router when the MSS voluntarily enters the idle mode. With reference to Figure 7, the MSS transmits a message from MOB-SLP-REQ to the network entity to request to enter the idle mode (S3-0). In the request message, the MSS includes its IP address to allow the network entity to respond to possible future ARP requests from the router. In response to the request, the network entity transmits the message of MOB-SLP-RSP to the MSS (S3-1). Upon receiving the response message from the network entity, the MSS enters the idle mode for the duration specified in the MOB-SLP-RSP message. After the idle interval, the MSS goes into operation to listen for the interval (Ll) to receive the MOB-TRF-ILD message from the network entity and determines if there is some downlink data to receive (S3-2). If there is no downlink data to receive, the MSS reenters the idle mode during an increased rest interval (2 * N1). Here, the rest interval increases by a specific amount (ie doubles the previous rest interval) after a listening interval. Figure 8 illustrates a process of acquiring link layer address of a router when the MSS enters the idle mode as a result of the command of the network entity. With reference to Figure 8, the process is similar to Figure 7. In Figure 8, however, instead of providing the MSS IP address by means of a request message, the MSS IP address is transmitted by a information message since a decision to enter the idle mode is taken by the network entity in this mode. It is also possible to repeat the process of transmitting the DREG-REQ message and the DREG-RSP message after the MSS receives the DREG-CMD message to enter the inactive mode. In this case, the MSS IP address can be transmitted through the DREG-REQ message. Figure 9 illustrates a process of acquiring link layer address of a router when the MSS voluntarily enters the inactive mode. In Figure 9, the MSS transmits the DREG-REQ message to a first network entity in order to enter inactive mode, and in response, the first network entity transmits the DREG-CMD message to grant the MSS to enter the Sleep mode (S4-0). In the DREG-REQ message, the MSS includes its IP address to the first network entity such that when the MSS is in the idle mode, the BS can respond to the router's ARP request without having to refer to the MSS. After the MSS of the first network entity (or central BS) has been deregistered, the first network entity broadcasts to all the other BSs in the same search area that the MSS has entered the inactive mode (S4-1) . The BSs that received the broadcast then add MSS information to their search list. When the router receives an IP packet, the router transmits the ARP request to the central BS to determine the MAC address of the destination IP address of the MSS (S4-2). In response, the central BS transmits an ARP response message to the router for MSS since the central BS has the necessary IP address information of the MSS (S4-3). Upon receipt of the ARP response message, the router transmits the IP packet to the central BS. After this, the central BS transmits a search announcement that notifies all BSs in the search area that there is downlink data for the MSS (S4-4). After receiving the search announcement, the BS having the MSS in its cell coverage area transmits a search message to the MSS in the specific search cycles (S4-5). Figure 10 illustrates another embodiment of the present invention. This illustration shows a process of acquiring the link layer address of a router when the MSS enters the idle mode as a result of the network entity command. With reference to Figure 10, the process with respect to communicating between the MSS and network entities is similar to Figure 9. In Figure 10, however, instead of providing the MSS IP address by means of a message from In this application, the MSS IP address can be transmitted by means of an information message since a decision is made to enter the idle mode by the network entity in this mode. It is also possible to repeat the process to transmit the DREG-REQ message and the DREG-RSP message after the MSS receives the DREG-CMD message to enter the inactive mode. In this case, the MSS IP address can be transmitted through the DREG-REQ message. In another embodiment of the present invention, the MSS makes a request at the network entity to retain the convergence sub-layer information. The convergence sub-layer typically is 2 layer protocols that are responsible for gathering and formatting a higher layer information so that they can be processed by the lower layers. Figure 11 illustrates another embodiment of a link layer address acquisition process of a router when the MSS voluntarily enters the idle mode. With reference to Figure 11, the operation and process of this modality are similar to the processes of Figure 9. Therefore, the same processes with respect to the modality of Figure 9 will be excluded. In this mode, the MSS transmits the DREG-REQ message to a first network entity in order to enter the inactive mode, and in response, the first network entity transmits the DREG-CMD message to grant the MSS to enter the mode at rest (S5-0). In the DREG-REQ message, the MSS includes a request to retain the convergence sub-layer (CS) information. By making the first network entity retain the CS information, the first network entity can respond to a request from a router without having to contact the MSS in the idle mode together with the downlink traffic. In effect, downlink traffic can be distributed more effectively and efficiently and network resources can be better utilized. As explained in the above, the remaining processes of the embodiment are the same as the processes of Figure 9. In addition, Figure 12 illustrates another embodiment of the present invention. Here, the mode represents a process of acquiring link layer address of a router when the MSS enters the idle mode as a result of the command of the network entity. With reference to Figure 12, the processes with respect to communicating between the MSS and the network entities are similar to the processes in Figure 11. In Figure 12, however, instead of providing the MSS IP address through a request message, the MSS transmits a request message to the first network entity to retain the CS information. This request can be transmitted through an information message or alternatively, by means of a DREG-REQ message. The rest of the processes are the same as Figure 11. It will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention cover the modifications and variations of this invention with the proviso that they fall within the scope of the appended claims and their equivalents.

Claims

CLAIMS 1. A method for communicating data to enter inactive mode, the method comprising: transmitting a request by a mobile subscriber station (MSS) to a network entity by means of a registration request message that requires the network entity to retain a preferred session information; and receiving a selected session information by means of a response from the deregistration command of the network entity.
2. The method of claim 1, wherein the preferred session information is a list of preferred session information.
The method of claim 1, wherein the network entity is a base station for which the MSS seeks to enter inactive mode.
4. The method of claim 1, wherein the network entity is a service base station.
The method of claim 4, wherein the serving base station transmits the selected session information to a plurality of base stations in a search group or a search controller.
6. The method of claim 4, wherein the service base station performs activity inactive for the MSS.
The method of claim 4, wherein the search controller performs activity inactive for the MSS.
The method of claim 1, wherein the network entity is a search controller.
The method of claim 8, wherein the search controller transmits the selected session information to a plurality of network entities in the search group.
The method of claim 9, wherein the plurality of network entities is a plurality of base stations.
The method of claim 8, wherein the search controller performs activity inactive for the MSS.
The method of claim 1, wherein the deregister request message includes a request by the MSS to terminate the normal mode and enter the inactive mode.
The method of claim 1, wherein the selected session information includes session information selected by the network entity.
The method of claim 13, wherein the selected session information is the list of session information retained by the network entity and the MSS in the idle mode.
15. The method of claim 1, further comprising receiving a message from the deregistration command of the network entity.
The method of claim 15, wherein the deregister command message includes a request in the MSS to transmit the deregister request message.
The method of claim 16, wherein the request indicates a specific time in which the MSS transmits the deregister request message.
18. A method for communicating data to enter inactive mode, the method comprising: receiving a request from a mobile subscriber station (MSS) by means of a deregister request message that requires the network entity to retain preferred session information; and transmitting selected session information by means of a deregistration command response for the network entity.
The method of claim 18, further comprising transmitting a request by a mobile subscriber station (MSS) to a network entity by means of a deregister request message that requires the network entity to retain a preferred session information, and receive a selected session information by means of a deregistration command response from the network entity.
The method of claim 18, further comprising receiving a command message to deregister the network entity.
21. A communication system, comprising a mobile subscriber station (MSS) for transmitting a request to a network entity by means of a deregister request message that requires the network entity to retain a preferred session information, and receive a Session information selected by a deregistration command response from the network entity.
22. The system of claim 21, which further comprises a network entity for receiving a request from a mobile subscriber station (MSS) by means of a deregister request message that requires the network entity to retain a preferred session information, and transmit selected session information by a deregistration command response from the network entity.
23. A method for communicating with a network entity for updating the location of a mobile subscriber station (MSS), the method comprising: transmitting a request to a second network entity by means of a distance determination request message that requires a Location update of the MSS from a first network entity; receiving a selected session information to be updated by a reply message from the second network entity; and performing the network entry procedure to update the session information after the location of the MSS is updated from the first network entity to the second network entity.
The method of claim 23, wherein the first network entity is the network entity to which the MSS has entered inactive mode.
25. The method of claim 23, wherein the first network entity and the second network entity are a base station or a search controller.
26. The method of claim 23, further comprising transmitting a distance determination request message by the MSSs for the second network entity.
The method of claim 26, wherein the distance determination request message includes an identification of the first network entity to which the MSS entered the inactive mode.
28. The method of claim 23, wherein the selected session information is indicated by a list of session information.
29. The method of claim 28, wherein the session information is updated by the MSS and the second network entity.
30. The method of claim 28, wherein the second network entity is a base station or a search controller.
31. The method of claim 28, wherein the list of session information includes a network entry procedure which the MSS performs to enter a network.
32. The method of claim 31, wherein the network entry procedure includes updating the selected session information retained in the MSS and the first network entity.
33. The method of claim 23, further comprising receiving a search message from the second network entity.
34. The method of claim 33, wherein the search message includes an identification of the MSS.
35. The method of claim 34, wherein the search message further includes an action code for the MSS that allows the MSS to perform a location update.
36. A method for communicating with a mobile subscriber station (MSS) to update the location of the MSS, the method comprising: receiving a request from the MSS in a second network entity by means of a distance request request message that requires an update of the location of the MSS from a first network entity; transmitting selected session information to be updated by the response message from the second network entity to the MSS; and performing the network entry to update the session information after the location of the MSS is updated from the first network entity to the second network entity.
37. A communication system, comprising a mobile subscriber station (MSS) for: transmitting a request to a second network entity by means of a distance determination request message that requires a location update of the MSS from a first entity of network; receiving a selected session information to be updated by a reply message from the second network entity; and performing the network entry to update the session information after the location of the MSS is updated from the first network entity to the second network entity.
38. The system of claim 37, further comprising at least one network entity for: receiving a request from the MSS in a second network entity by means of a distance determination request message that requires an update of the location of the network. the MSS from a first network entity; transmitting selected session information to be updated by the response message from the second network entity to the MSS; and logging into the network to update the session information after the location of the MSS is updated from the first network entity to the second network entity.
39. A method for communicating with a network entity to access the network, the method comprising: transmitting a request to a second network entity by means of a distance determination request message; receiving selected session information by means of a distance determination response message from a second network entity, where the selected session information is received by the second network entity from a first network entity; and enter a network of the second network entity.
40. The method of claim 39, wherein the first network entity retains the last updated session information of the MSS.
41. The method of claim 39, wherein the first network entity and the second network entity are a base station or a search controller.
42. The method of claim 39, wherein the second network entity is a base station or a search controller.
43. The method of claim 39, wherein the second network entity is the network entity to which the MSS seeks to enter inactive mode.
44. The method of claim 39, wherein the distance determination request message includes an identification of the first network entity to which the MSS entered the inactive mode.
45. The method of claim 39, wherein the selected session information is indicated by an indication list of session information.
46. The method of claim 45, wherein the session information is updated by the MSS and the second network entity.
47. The method of claim 45, wherein the second network entity is a base station or a search controller.
48. The method of claim 45, wherein the list of session information includes a network entry procedure which the MSS performs to enter a network.
49. The method of claim 48, wherein the network entry procedure includes updating the selected session information retained in the MSS and the second network entity.
50. The method of claim 39, further comprising receiving a search message from the second network entity.
51. The method of claim 39, wherein the search message includes an identification of the MSS.
52. The method of claim 51, wherein the search message further includes an action code for the MSS that allows the MSS to perform a location update.
53. A method for communicating with a mobile subscriber station (MSS) to access the network, the method comprises: receiving a request from the MSS by means of a distance determination request message; transmitting selected session information by means of a distance determination response message to the MSS, where the selected session information is received by the second network entity from a first network entity; and allowing the MSS to enter a network of the second network entity.
54. A communication system, comprising a mobile subscriber station (MSS) for: transmitting a request to a second network entity by means of a distance determination request message; receiving selected session information by means of a distance determination response message from a second network entity, where the selected session information is received by the second network entity from a first network entity; and enter a network of the second network entity.
55. The system of claim 54, further comprising at least one network entity for: receiving a request from the MSS by means of a distance determination request message; transmitting selected session information by means of a distance determination response message to the MSS, where the selected session information is received by the second network entity from a first network entity; and allowing the MSS to enter a network of the second network entity.
56. A method for communicating data in a wireless broadband communication system, the method comprising: transmitting to a first network entity a request to retain a network address by means of a request message; enter inactive mode after receiving a reply message from the first network entity; receive a search message from a second network entity during the idle mode; enter a network of the second network entity; and receiving an internet protocol (IP) packet from the second network entity.
57. The method of claim 56, wherein the network address is the internet protocol address (IP).
58. The method of claim 56, wherein the request message is a deregistration request message (DREG-REQ).
59. The method of claim 56, wherein the request message includes a request by a mobile subscriber station (MSS) to enter inactive mode.
60. The method of claim 56, wherein the request message includes the IP address from a mobile subscriber station (MSS) to directly provide the first network entity.
61. The method of claim 56, wherein the request message includes a request for the first network entity to retain the internet protocol (IP) address of a mobile subscriber station (MSS).
62. The method of claim 56, wherein the response message is a deregistration command message (DREG-CMD).
63. The method of claim 56, wherein the response message includes a command for a mobile subscriber station (MSS) to enter the idle mode.
64. The method of claim 56, wherein the search message notifies a mobile subscriber station (MSS) of the downlink data.
65. The method of claim 64, wherein the downlink data is the IP packet.
66. The method of claim 56, wherein at least one of the first network entity and the second entity is a base station, search controller, access link port, or base station controller.
67. The method of claim 66, wherein the search controller retains a certain MSS service and useful operational information to facilitate the re-entry of a future MSS network from the idle mode.
68. The method of claim 56, further comprising the first network entity communicating with a router to be able to distribute the IP packet to the first network entity.
69. The method of claim 68, wherein a destination address of the IP packet is an IP address of a mobile subscriber station (MSS) held in the first network entity.
70. The method of claim 68, wherein the router transmits to the first network entity a Request for Address Resolution Protocol (ARP) to acquire a link layer address of an IP packet destination, and in response, The first network entity transmits an ARP response to the router for the MSS.
71. The method of claim 68, wherein the router transmits to the first network entity a neighbor solicitation to acquire a link layer address of an IP packet destination, and the first network entity transmits to the router a neighboring advertisement. for the MSS.
72. The method of claim 68, wherein the first network entity broadcasts an Address Resolution Protocol (ARP) response for a mobile subscriber station (MSS) to a plurality of network entities.
73. The method of claim 68, wherein the first network entity broadcasts a neighbor advertisement for a mobile subscriber station (MSS) to a plurality of network entities.
74. The method of claim 72 or 73, wherein at least one of the network entities is a base station, search controller, access link port, or base station controller.
75. The method of claim 74, wherein the search control retains a certain MSS service and useful operational information to facilitate re-entry of a future MSS network from the idle mode.
76. A method for communicating data in a wireless broadband communication system, the method comprising: receiving from a mobile subscriber station (MSS) up to a first network entity a request to retain a network address by means of a request message; allow the MSS to enter inactive mode by transmitting a response message from the first network entity to the MSS; transmit a search message from a second network entity during idle mode; allow the MSS to enter a network of the second network entity; and transmit an internet protocol (IP) packet from the second network entity to the MSS.
77. A wireless broadband communication system, comprising a mobile subscriber station for: transmitting to a first network entity a request to retain a network address by means of a request message; enter inactive mode after receiving a reply message from the first network entity; receiving a search message from a second network entity during the idle mode; enter a network of the second network entity; and receive an internet protocol (IP) packet from the second network entity.
78. The system of claim 77, further comprising at least one network entity for: receiving from a mobile subscriber station (MSS) to a first network entity a request to retain a network address by means of a request message; allow the MSS to enter inactive mode by transmitting a response message from the first network entity to the MSS; transmitting a search message from a second network entity during the idle mode; allow the MSS to enter a network of the second network entity; and transmit an internet protocol (IP) packet from the second network entity to the MSS.
79. A method for communicating data in a wireless broadband system, the method comprising: transmitting by means of a request message a request to a first network entity to retain a convergence sub-layer (CS) information; enter inactive mode after receiving a reply message from the first network entity; receiving a search message from a second network entity during the idle mode; enter the network of the second network; and receiving a data packet from the second network entity.
80. The method of claim 79, wherein the CS information includes an internet protocol (IP) address.
81. The method of claim 79, wherein the CS information includes information related to the service flow.
82. The method of claim 81, wherein the information related to the service flow includes preferred service flow for a mobile subscriber station (MSS) to receive during the idle mode.
83. The method of claim 79, wherein the data packet corresponds to the CS information retained in the first network entity.
84. A method for communicating data in a wireless broadband communication system, the method comprising: receiving from the MSS by means of a request message an application to a first network entity to retain a convergence sub-layer (CS) information; allow entry to the idle mode after transmitting a reply message to the MSS from the first network entity; transmitting a search message to the MSS from a second network entity during the idle mode; allow the MSS to enter the network of the second network; and transmitting a data packet to the MSS from the second network entity.
85. A wireless broadband communication system, comprising a mobile subscriber station (MSS) for: transmitting, by means of a request message, a request to a first network entity to retain a convergence sub-layer (CS) information; enter inactive mode after receiving a reply message from the first network entity; receiving a search message from a second network entity during the idle mode; enter the network of the second network; and receiving a data packet from the second network entity.
86. The system of claim 85, comprising at least one network entity for: receiving from the MSS by means of a request message a request for a first network entity to retain a convergence sub-layer (CS) information; allow to enter inactive mode after transmitting a reply message to the MSS from the first network entity; transmitting a search message to the MSS from a second network entity during the idle mode; allow the MSS to enter the network of the second network; and transmitting a data packet to the MSS from the second network entity.