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Method and apparatus to control handoff between different wireless systems

A technology of wireless systems and equipment, applied in transmission systems, wireless communications, digital transmission systems, etc., and can solve the problem that a moderate method has not been developed.

Inactive Publication Date: 2006-08-16
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For a mobile station capable of operating in both 1xRTT and 1xEV-DO systems, a modest means for transitioning a mobile station between a 1xEV-DO system and a 1xRTT system has not been developed

Method used

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  • Method and apparatus to control handoff between different wireless systems
  • Method and apparatus to control handoff between different wireless systems
  • Method and apparatus to control handoff between different wireless systems

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Embodiment Construction

[0015] In the following description, various details are set forth in order to provide an understanding of the present invention. However, it will be understood by those skilled in the art that the invention may be practiced without these details and that various changes or modifications from the described embodiments are possible.

[0016] refer to figure 1 , the wireless communication network 10 has a coverage area generally designated 12 . In one embodiment, the wireless communication network 10 includes components that operate according to CDMA (Code Division Multiple Access) 2000 . CDMA2000 is defined by the family of CDMA2000 standards (collectively referred to as the IS-2000 standards) developed by the Third Generation Partnership Project 2 (3GPP2). However, other types of wireless protocols may be used for communications in the wireless communication network 10 in other embodiments.

[0017] Wireless communication network 10 includes a base station (BS) 14 , which i...

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Abstract

A wireless communications network (10) includes a first base station system (40) that performs wireless communications according to a first protocol (e.g., 1xEV-DO protocol) and a second base station system (14) that performs wireless communications according to a second, different protocol (e.g., IS-2000). A link is provided between the first and second base station systems (40, 41) to enable a network-initiated handoff procedure. If a source base station systems detects that a handoff of a mobile station to a target base station system is required, the source base station system exchanges messaging over the link with the target base station system to perform the handoff. In one example, the handoff is a hard handoff.

Description

technical field [0001] The present invention generally relates to methods and apparatus for controlling handover between different wireless systems. Background technique [0002] A mobile communication system such as a cellular or personal communication service (PCS) system consists of a plurality of cells. Each cell provides a radio communication center in which a mobile station establishes a call with another mobile station or a wired unit connected to a public switched telephone network (PSTN) or a packet switched data network (PSDN). Each cell comprises a radio base station, and each base station connected to a mobile switching center controls call processing between mobile stations or between a mobile station and a wireline terminal. [0003] Various wireless protocols exist for defining communications in a wireless network. One such protocol is the Time Division Multiple Access (TDMA) standard, such as the TIA / EIA-136 standard provided by the Telecommunications Indus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04L12/56H04W36/14
CPCH04W36/0066H04W36/38
Inventor L·莫拉勒斯G·吴A·阿马德D·W·帕兰基克M·瓦舒德文Y·希加施
Owner TELEFON AB LM ERICSSON (PUBL)