Broadcasting of two generation cellular system control channel information over three generation control channel to support roaming and handover to two generation cellular networks

A control channel information and control channel technology, applied in the field of wireless communication networks, can solve the problems of lack of specific geographic location, missing information, etc., and achieve the effects of saving power, preventing information leakage, and improving efficiency

Inactive Publication Date: 2003-10-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Initially, 3G coverage areas are limited, and information may be lost due to lack of geographic coverage

Method used

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  • Broadcasting of two generation cellular system control channel information over three generation control channel to support roaming and handover to two generation cellular networks
  • Broadcasting of two generation cellular system control channel information over three generation control channel to support roaming and handover to two generation cellular networks
  • Broadcasting of two generation cellular system control channel information over three generation control channel to support roaming and handover to two generation cellular networks

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Embodiment Construction

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] Figure 1 shows a block diagram of a communication network 10 according to a preferred embodiment of the present invention. The communication network 10 preferably comprises a wireless telephone network which can be seen to include an originating mobile station (MS) 12 connected to a serving WCDMA originating network 14 by a radio frequency (RF) communication link. Originating MS 12 is preferably a mobile station of the cellular type comprising wireless, such as a personal communications service (PCS) or cellular telephone, but could also comprise, for example, a computer, personal digital assistant (PDA) or other wireless terminal. The originating WCDMA network 14 is seen to be connected to a transit network or communication link 16, which may comprise a public switched telephone network (PSTN), but may also comprise other networks, including a fiber optic network if desired network. Transit network 16 interfac...

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Abstract

A method, node and wireless communication terminal for providing handover and roaming from a 3G communication system to a 2G communication system. A dual-mode wireless terminal operating in a 3G communication system may obtain control channel information regarding a 2G communication system, and switch service as a function of the control channel information received. The method includes the step of providing control channel information for the 2G communication system over a downlink control channel of the 3G communication system to the wireless terminal. The node includes a means to communicate with the wireless communication terminal and a means providing control channel information of a second generation (2G) communication network over a downlink control channel at the 3G communication network. The wireless communication terminal includes a transceiver capable of communicating with a node of both a third generation (3G) wireless communication network and a second generation (2G) wireless communication network, and a control means coupled to the receiver for receiving and identifying control channel information indicative of the 2G communication network from a downlink control channel at the 3G communication network.

Description

technical field [0001] The present invention relates generally to wireless communication networks, and more particularly to roaming and handover from Wideband Code Division Multiple Access (WCDMA) third generation (3G) networks to second generation (2G) networks. Background technique [0002] Wireless communication networks, including fixed wireless and cellular type mobile communication networks, continue to develop. There are several technologies available for providing wireless communications, including Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Global System for Mobile Communications (GSM), Advanced Mobile Phone System (AMPS) and Digital AMPS (D-AMPS ) (IS-136 TDMA). These networks continue to be adopted around the world. Many equipment manufacturers are producing these different systems, and typically through standards groups to ensure the commonality and interoperability of these different networks. [0003] As wireless communication...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04M3/00H04W36/14H04W48/12H04W88/06
CPCH04W36/14H04W48/12H04W88/06H04W72/04
Inventor J·L·克兰斯默
Owner TELEFON AB LM ERICSSON (PUBL)
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