Abstract: A method of associating a mobile station to a base station in a wireless communication system comprises transmitting to a serving base station a scanning request message comprising an association indicator. The method also comprises receiving from the serving base station a scanning response message comprising a rendezvous time associated with a neighboring base station for initiating ranging with the neighboring base station, wherein the serving base station communicates an association notification to the neighboring base station, the association notification comprising the rendezvous time. The method also comprises associating with the neighboring base station by transmitting a ranging request after passing of the rendezvous time determined from a transmission time of the scanning response message from the neighboring base station, wherein the rendezvous time is associated with a time the neighboring base station is expected to provide a non-contention based ranging opportunity for the mobile station.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to execute handover. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: A method of associating a mobile station to a base station in a wireless communication system comprises transmitting to a serving base station a scanning request message comprising an association indicator. The method also comprises receiving from the serving base station a scanning response message comprising a rendezvous time associated with a neighboring base station for initiating ranging with the neighboring base station, wherein the serving base station communicates an association notification to the neighboring base station, the association notification comprising the rendezvous time.

Abstract: The present invention relates to supporting a handover of a mobile terminal. Preferably, the present invention performs a scan of a neighboring network different from a current network of the mobile terminal to determine the presence of an accessible link of the neighboring network for performing a handover, wherein the mobile terminal comprises a heterogeneous network handover module that is configured to provide convergence of information from at least one network interface module associated with one of a homogeneous and heterogeneous network into a unified presentation. An information message is then received from the neighboring network, wherein the information message comprises an information element associated with whether the neighboring network is capable of communicating with the heterogeneous network handover module of the mobile terminal.

Abstract: The present invention relates to link layer status information using a media independent handover module in a mobile communication system, wherein packet loss attributed to congestion can be identified from packet loss attributed to non-congestion. Preferably, the present invention comprises establishing communication between a mobile terminal and at least one of a homogeneous and heterogeneous network, reporting status information of a radio link connecting the mobile terminal and the at least one of a homogeneous and heterogeneous network to a heterogeneous network handover module of the mobile terminal, and reporting the status information of the radio link from the heterogeneous network handover module to an upper management entity of the mobile terminal if the heterogeneous network handover module determines a predetermined condition is satisfied.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to perform a method of connecting to the network. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: The present invention relates to performing handover of a mobile terminal to a network. Preferably, the present invention generates a first heterogeneous protocol message from a heterogeneous network handover module to a medium access control (MAC) of the mobile terminal, wherein the heterogeneous network handover module is configured to provide convergence of information from at least one network interface module associated with one of a homogeneous and heterogeneous network into a unified presentation. A management request associated with a handover process is then transmitted to a serving network, wherein the management request comprises the first heterogeneous protocol message. Accordingly, messages can be remotely exchanged via a radio section between heterogeneous network handover modules of a mobile terminal and a serving network. Therefore, messages are transferred faster and media independent handover is performed more quickly.

Abstract: The present invention relates to providing mobility management protocol information to a multi-mode mobile terminal for performing handover between heterogeneous networks. Preferably, the present invention establishes a unified interface to an upper layer of the mobile terminal for managing messages to and from at least one of a homogeneous network and a heterogeneous network, establishes a connection with an accessible link of at least one of a homogeneous network and a heterogeneous network for performing handover, and receives in the upper layer information from the unified interface related to the established connection. Preferably, the step of receiving the information includes receiving mobility management protocol information of the at least one of a homogeneous network and a heterogeneous network. Accordingly, the mobile terminal reduces a time duration for establishing a Care of Address (CoA) using a new mobility management protocol of a new network the mobile terminal has been handed over to.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to perform scanning procedures. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: A method for transmitting messages to alter the operating status between a mobile station and a base station in a wireless access system comprises, at the mobile station, transmitting a first message to the base station, setting a first count to a first predetermined value and enabling a first, the first message requesting a alteration in operating status between the mobile station and the base station, whereupon expiration of the first timer before receiving a second message from the base station, the count is decremented and, if the count is above a second predetermined value, the first timer is reset and the first message is retransmitted to the base station. The method also comprises, at a base station, receiving the first message, transmitting a second message to the mobile station and enabling a second timer, whereupon expiration of the second timer, the alteration in operating status is effected.

Abstract: A method of performing a handover to at least one of a homogeneous and heterogeneous network is disclosed. More specifically, the method comprises establishing a heterogeneous network handover module for converging information from the at least one network interface module associated with the at least one of a homogeneous and heterogeneous network into a unified presentation. The method further comprises receiving a message for establishing connection by the at least one network interface module in a mobile terminal from the heterogeneous network handover module, performing link switch operation for establishing connection with an interface module in a network, and transmitting a confirmation message for indicating a link switch status to the heterogeneous network handover module.

Abstract: A method of discovering at least one of a homogeneous and a heterogeneous network module to perform handover with in a wireless mobile communication network is disclosed. More specifically, the method includes establishing a network handover module for converging information from at least one network interface module associated with at least one of a homogeneous and a heterogeneous network handover module into a unified presentation and transmitting a broadcast request message from a mobile station (MS) to a source point of attachment (PoA) which transmits the broadcast request message to at least one interface module to identify whether the at least one interface module supports at least one of the homogeneous and the heterogeneous network handover module and a capability of the at least one of the homogeneous and the heterogeneous network handover module.

Abstract: The present invention relates to a method of releasing a network connection with a link of a medium access control layer previously accessed before performing a handover to a heterogeneous network in a mobile terminal configured with a multi-mode (e.g., interface between IEEE802.16 and IEEE802.il, interface between IEEE802.16 and 3GPP/3GPP2 or interface between IEEE802.il and 3gPP/3GPP2). In a multi-mode mobile terminal, the present invention includes the steps of creating a connection with a new link, generating a trigger event indicating a connection creation with the new link, and generating a trigger event instructing a connection release from an old link.

Abstract: A method of entering sleep mode in a mobile subscriber station in performing handover from a first base station (BS) to a second BS is disclosed. More specifically, the method includes entering sleep mode in the first base station and transmitting from the first base station sleep mode information in the first base station during handover, while receiving from a second base station sleep mode entry information in the second base station. The method further includes entering sleep mode based on the information the sleep mode entry information received from the second base station.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to execute handover. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: A method of updating channel information by a mobile station (MS) that is in power saving mode is disclosed. More specifically, the method includes the MS which receives status information of a first channel descriptor and transmission frame information which includes when the first channel descriptor is to be transmitted. Furthermore, the MS compares status information of the first channel descriptor with status information of a second channel descriptor. Here, the second channel descriptor is stored in the MS. Lastly, if the compared status information are different, the MS receives the first channel descriptor according to the transmission frame information.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to perform scanning procedures. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to execute handover. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: A method for transmitting messages to alter the operating status between a mobile station and a base station in a wireless access system comprises, at the mobile station, transmitting a first message to the base station, setting a first count to a first predetermined value and enabling a first, the first message requesting a alteration in operating status between the mobile station and the base station, whereupon expiration of the first timer before receiving a second message from the base station, the count is decremented and, if the count is above a second predetermined value, the first timer is reset and the first message is retransmitted to the base station. The method also comprises, at a base station, receiving the first message, transmitting a second message to the mobile station and enabling a second timer, whereupon expiration of the second timer, the alteration in operating status is effected.

Abstract: A method of communicating information in a wireless mobile communication system is disclosed. More specifically, the method includes a network for establishing handover management modules in a source network and a target network and transmitting a handover request message from the handover management module of the source network to the handover management module of the target network. Furthermore, the network is used for receiving a handover response message from the handover management module of the target network to the handover management module of the source network, wherein the handover response message includes an internet protocol address information and transmitting a handover confirmation message from the handover management module of the source network to a mobile terminal, wherein the handover confirmation message includes the internet protocol address information.