Forward link based rescue channel method and apparatus for telecommunication systems

A channel-guided technology, applied in radio/inductive link selection arrangements, transmission systems, selection devices, etc., can solve problems such as burst error rate, excessively high error frame rate, interference, etc.

Inactive Publication Date: 2006-12-13
DENSO CORP
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  • Claims
  • Application Information

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Problems solved by technology

[0029] Layer 2 acknowledgment failures and forward link fading failures may occur due to excessive frame error rates or burst error rates
However, the proposed rescue procedure based on restarting the connection introduces a lot of interference since the MS is probing to utilize the access channel and requires a lot of power
Furthermore, the proposed reverse-based rescue procedure is only initiated under forward fading conditions, and since the MS transmits before the BS, it is deficient, and this method appears to be less efficient for reasons explained below

Method used

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  • Forward link based rescue channel method and apparatus for telecommunication systems
  • Forward link based rescue channel method and apparatus for telecommunication systems
  • Forward link based rescue channel method and apparatus for telecommunication systems

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Embodiment Construction

[0065] In the following description of preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and are shown by way of illustration of specific embodiments which may enable the invention to be practiced. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of these desired embodiments of the present invention. It should also be understood that while the description provided herein primarily refers to the CDMA communication protocol for purposes of explanation only, embodiments of the invention are generally applicable to other communication protocols and digital radio technologies, and include CDMA, TDMA, FDMA, GSM, GPRS, etc. etc., but not limited to this.

[0066] Overview of Forward Rescue Procedures

[0067] The present invention includes methods and apparatus for preventing signal loss and disconnection between MSs and the infrastructure in a telecommunica...

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Abstract

A forward rescue procedure (FRP) for preventing loss of signal and dropped connections between a mobile station and the infrastructure in a wireless telecommunications network is disclosed. The FRP allows wireless systems to recover from forward link failures at the mobile station that would otherwise result in dropped connections. Examples of failure scenarios that can be overcome using the FRP include forward link Layer 2 acknowledgement failures and loss of forward link signal due to a fade that causes loss of signal for a period of time exceeding a threshold value. In response to a potential connection drop situation, a mobile station will autonomously add base station pilot channels to the active set of its rake receiver in order to rescue the connection in danger of dropping. Concurrently, the wireless network infrastructure will initiate transmission on alternative forward link channels that are likely to be monitored by the mobile station during an FRP. If the same channels are monitored by the MS and transmitted on by the infrastructure, the connection in danger of dropping can be rescued.

Description

[0001] This application is a divisional application filed on October 16, 2001 with the application number 01817519.8 and the name "Rescue Channel Method and Device Based on Forward Link in Telecommunication System". [0002] Cross References to Related Applications [0003] Embodiments of the present invention claim U.S. Provisional Patent Application Serial No. 60 / 241,268, filed October 17, 2000, entitled "Forward Rescue Procedure," and filed November 14, 2000, entitled Priority of U.S. Provisional Patent Application Serial No. 60 / 248,900 for "Improvement to Rescue Channels Using Dynamic Active Set During Rescue," the contents of which are hereby incorporated by reference for all purposes . technical field [0004] In general, the present invention relates to communication network management and, in one embodiment, to methods of preventing signal loss and disconnection between a mobile station (such as a cellular or PCS phone) and a wireless communication infrastructure (net...

Claims

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Application Information

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IPC IPC(8): H04Q7/20H04Q7/38H04Q7/36H04W24/04H04B1/707H04W76/02
CPCY02B60/50
Inventor 贾森·F·安齐热
Owner DENSO CORP
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