Method of performing and supporting handover in broadband wireless access system
First Claim
1. A method for performing a handover between a first and second Multicast and Broadcast Service (MBS) zones in a wireless access system, the method comprising:
- receiving, by a mobile station, MBS data from a first base station belonging to the first MBS zone, wherein a first MBS zone identifier (ID) is used for the first MBS zone;
receiving, by the mobile station, a broadcast message including downlink channel descriptors and uplink channel descriptors of neighboring base stations including a second base station belong to the second MBS zone from the first base station;
synchronizing with the neighboring base stations by using the at least one of a downlink channel descriptor and an uplink channel descriptor;
scanning the synchronized neighboring base stations;
determining to handover to the second base station based on a result of the scanning;
transmitting, by the mobile station, a handover request message to request the handover between the first and the second MBS zones;
receiving, by the mobile station, a handover response message including parameter information from the first base station; and
receiving, by the mobile station, the MBS data from the second base station, using the parameter information,wherein the parameter information includes a second MBS zone identifier (ID), MBS capability information, a second base station ID, a multicast connection ID (CID), a logical flow identifier (ID) generated from a server of the second MBS zone, Media Access Control (MAC) Protocol Data Unit (PDU) size information of the second MBS zone and security information of the second MBS zone,wherein the MBS capability information indicates whether the handover between the first and the second MBS zones is a macro-diversity handover, andwherein the security information includes a multicast group key.
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Abstract
A method for performing a handover between MBS zones of a mobile station receiving multicast and broadcast service (MBS) data in a wireless access system is disclosed. The method for performing the handover between first and second MBS zones of the mobile station in a wireless access system includes receiving the MBS from a first base station belonging to the first MBS zone which uses a first MBS zone identifier (ID), requesting the handover between the first and second MBS zones, receiving parameter information including a second MBS zone identifier (ID), from the first base station, and receiving the MBS from a second base station belonging to the second MBS zone, using the parameter information, wherein the second MBS zone uses the second MBS zone identifier (ID) which is needed to receive the MBS.
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Citations
7 Claims
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1. A method for performing a handover between a first and second Multicast and Broadcast Service (MBS) zones in a wireless access system, the method comprising:
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receiving, by a mobile station, MBS data from a first base station belonging to the first MBS zone, wherein a first MBS zone identifier (ID) is used for the first MBS zone; receiving, by the mobile station, a broadcast message including downlink channel descriptors and uplink channel descriptors of neighboring base stations including a second base station belong to the second MBS zone from the first base station; synchronizing with the neighboring base stations by using the at least one of a downlink channel descriptor and an uplink channel descriptor; scanning the synchronized neighboring base stations; determining to handover to the second base station based on a result of the scanning; transmitting, by the mobile station, a handover request message to request the handover between the first and the second MBS zones; receiving, by the mobile station, a handover response message including parameter information from the first base station; and receiving, by the mobile station, the MBS data from the second base station, using the parameter information, wherein the parameter information includes a second MBS zone identifier (ID), MBS capability information, a second base station ID, a multicast connection ID (CID), a logical flow identifier (ID) generated from a server of the second MBS zone, Media Access Control (MAC) Protocol Data Unit (PDU) size information of the second MBS zone and security information of the second MBS zone, wherein the MBS capability information indicates whether the handover between the first and the second MBS zones is a macro-diversity handover, and wherein the security information includes a multicast group key. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification