METHOD FOR PERFORMING SOFTER HANDOVER IN A BROADBAND WIRELESS COMMUNICATION SYSTEM
First Claim
1. A method of performing softer handover in a broadband wireless communication system in including at least one base station (BS) and at least one mobile station (MS), the method comprising the steps of:
- granting identification numbers to neighboring antennas associated with said at least one base station currently performing communication, and transmitting to a neighbor base station advertisement message including the identification numbers of the neighboring antennas;
receiving a handover request message including an identification number of a particular antenna from at least one mobile station operating in said wireless communication system;
determining if the particular antenna is located within a current coverage area of the base station, and adding the particular antenna to a diversity set and providing notification information on multiple antennas included in the diversity set to the mobile station when the particular antenna is located within the current coverage area of the base station;
multicasting an identical frame to the multiple antennas included in the diversity set; and
receiving a handover indication message from the mobile station.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a method of performing softer handover in a broadband wireless communication system. The method includes granting identification numbers to neighbor antennas around a mobile station currently performing communication, and transmitting a neighbor base station advertisement message including the identification numbers of the neighbor antennas, receiving a handover request message including an identification number of a particular antenna from the mobile station, determining if the particular antenna is located within a current coverage area of the base station, and adding the particular antenna to a diversity set and notifying information on multiple antennas included in the diversity set to the base station when the particular antenna is located within the current coverage area of the mobile station; multicasting an identical frame to the multiple antennas included in the diversity set and receiving a handover indication message from the mobile station.
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Citations
23 Claims
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1. A method of performing softer handover in a broadband wireless communication system in including at least one base station (BS) and at least one mobile station (MS), the method comprising the steps of:
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granting identification numbers to neighboring antennas associated with said at least one base station currently performing communication, and transmitting to a neighbor base station advertisement message including the identification numbers of the neighboring antennas; receiving a handover request message including an identification number of a particular antenna from at least one mobile station operating in said wireless communication system; determining if the particular antenna is located within a current coverage area of the base station, and adding the particular antenna to a diversity set and providing notification information on multiple antennas included in the diversity set to the mobile station when the particular antenna is located within the current coverage area of the base station; multicasting an identical frame to the multiple antennas included in the diversity set; and receiving a handover indication message from the mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11)
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8. A method of performing softer handover by a mobile station in a broadband wireless communication system, the method comprising the steps of:
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receiving neighbor base station information including identification numbers of neighbor antennas from a serving base station currently performing communication; measuring and scanning intensities of incoming signals from the neighbor antennas associated with the neighbor base station; determining a location of a neighbor antenna when a result of the scanning shows that an incoming signal from the neighbor antenna has an intensity larger than that of an incoming signal from an antenna from a current serving base station in communication with said mobile station; when the location of the neighbor antenna belongs to an area of the same serving base station, transmitting an identification number of the neighbor antenna to the serving base station; receiving identical frames from at least one antenna and combining the received frames; and transmitting a handover indication message to the serving base station. - View Dependent Claims (9, 10)
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12. An apparatus for performing softer handover in a broadband wireless communication system, the apparatus comprising:
a processor in communication with a memory, the memory including code, which when accessed by the processor provides instruction to the processor to execute; granting identification numbers to neighboring antennas associated with said at least one base station currently performing communication, and transmitting to a neighbor base station advertisement message including the identification numbers of the neighboring antennas; receiving a handover request message including an identification number of a particular antenna from at least one mobile station operating in said wireless communication system; determining if the particular antenna is located within a current coverage area of the base station, and adding the particular antenna to a diversity set and providing notification information on multiple antennas included in the diversity set to the mobile station when the particular antenna is located within the current coverage area of the base station; multicasting an identical frame to the multiple antennas included in the diversity set; and receiving a handover indication message from the mobile station. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for initiating a softer handover on a wireless communication network composed of at least one base stations and at least one mobile station, said method comprising:
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receiving a handover request from a mobile station; determining whether said handover request includes an antenna identification associated with a base station in communication with the mobile station; and switching transmission to said identified antenna, else providing handover information to a neighboring base station.
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Specification