发明名称 |
Handoff monitoring in cellular communication network using slow frequency hopping |
摘要 |
<p>Methods for handoff in a wireless communication network including a local area network connected to a plurality of base stations, each of which has a geographic area, defined as a cell, within which mobile stations can communicate with a base station, with each such base station being capable of performing bidirectional wireless communication with one or more of said mobile stations under control of a controller, with communication between base stations and mobile stations being performed by frequency hopping, with there being n available frequency hopping channels in a fixed frequency band, with each channel being of a same fixed duration and having a fixed frequency different than another channel. The handoff method employs structure and techniques for determining by a mobile station that the quality of transmission between itself and a current base station has degraded below a predetermined performance level, structure and technique for the mobile station to listen to each of successive frequency channels for a duration substantially less than the fixed duration of a channel until it senses a transmission from another base station, and structure and techniques for transferring control of the mobile station to another base station in response to the sensed transmission.</p> |
申请公布号 |
EP0677940(B1) |
申请公布日期 |
2003.06.18 |
申请号 |
EP19950104938 |
申请日期 |
1995.04.03 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
HUANG, CHIA-CHI;BANTZ, DAVID FREDERICK;BAUCHOT, FREDERIC;NATARAJAN, KADATHUR SUBRAMANYA;NARASIMHAN, ANAND;WETTERWALD, MICHELE MARIE |
分类号 |
G06F13/00;H04L12/28;H04W24/00;H04W36/08;H04W36/30;H04W84/12;(IPC1-7):H04L12/28;H04Q7/38;H04B7/26;H04L1/20;H04B1/713 |
主分类号 |
G06F13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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