Use of RSSI indication for improved data transmission over amps network

• US 6,073,030 A
• Filed: 03/19/1997
• Issued: 06/06/2000
• Est. Priority Date: 02/13/1995
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Nair, N. Gopolan, Brun, Zdenek
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): Ferguson, Keith
• Application Number:
  US08/820,129
• Time in Patent Office: 1,175 Days
• Field of Search: 455/557, 455/222, 455/466, 455/550, 455/450, 455/552, 455/561, 455/426, 455/72, 379/67, 379/93.28, 379/93.29, 379/93.33, 379/93.34, 340/825.44, 375/222
• US Class Current: 455/557
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A method of using control channel information is provided to enhance data throughput of a cellular communication system. The cellular communication system includes a single system control unit coupled to a data pump, a cellular transceiver and a radio transceiver. A method of operating the cellular communication system includes the following steps: (a) detecting a control channel signal indicating that a channel interruption is to occur; (b) decoding the control channel signal; (c) sending the decoded control channel signal to the system control unit; (d) controlling the parameters of the adaptive components of the data pump so that the parameters remain at a converged state or are adjusted even during the channel interruption; (e) interrupting the channel; and (f) re-establishing the channel within a reduced retraining time period.

Claims

1. In an integrated cellular communication system which communicates with a remote modem by radio waves through a base station and the telephone network and wherein said system includes a data pump component having an adaptive component that adjusts the parameters of said data pump to match the characteristics of said remote modem and the communication channel between said remote modem and said integrated cellular communication system, said data pump component being operatively connected to a cellular transceiver component which is in turn operatively connected to a radio frequency transceiver component and a system control unit operatively connected to each of said components, and wherein said radio frequency transceiver component generates a RSSI signal, the improvement comprising:

monitoring means for monitoring said RSSI signal;

comparator means communicating with said monitoring means for comparing said monitored RSSI signal with a predetermined value;

freezing means communicating with said comparator means and said adaptive component for freezing said adaptive component when said RSSI signal and said predetermined value are in a specified relationship;

unfreezing means communicating with said comparator means and said adaptive component for unfreezing said adaptive component when said RSSI is no longer in said specified relationship with said predetermined value such that said parameters of said data pump are substantially the same as at the time of freezing said adaptive component.

2. The system of claim 1 wherein said relationship between said monitored RSSI signal and predetermined value is that said monitored RSSI signal is lower in value than said predetermined value.

3. The system of claim 1 wherein said means for freezing said adaptive component includes means for freezing an equalizer, a carrier phase tracking unit, an interpolator and an automatic gain control unit.

4. The system of claim 1 wherein said cellular communication system includes an advanced mobile phone system cellular network.

5. In an integrated cellular communication system which communicates with a remote modem by radio waves through a base station and the telephone network and wherein said system includes a data pump component having an adaptive component that adjusts the parameters of said data pump to match the characteristics of said remote modem and the communication channel between said remote modem and said integrated cellular communication system, said data pump component being operatively connected to a cellular transceiver component which is in turn operatively connected to a radio frequency transceiver component and a system control unit operatively connected to each of said components, and wherein said radio frequency transceiver component generates a RSSI signal, said system comprising:

sampling means for sampling the amplitude of said RSSI signal at predetermined time intervals;

comparator means communicating with said sampling means for comparing the amplitude of said sample at an interval with the value of the amplitude of said RSSI signal at the previous interval; and

freezing means communicating with said comparator means and said adaptive component for freezing said adaptive component when said amplitude decreases for n consecutive time intervals; and

unfreezing means communicating with said comparator means and said adaptive component for unfreezing said adaptive component when said RSSI is no longer in a specified relationship with a predetermined value such that said parameters of said data pump are substantially the same as at the time of freezing said adaptive component.

6. The system of claim 5 wherein n is 3.

7. The system of claim 5 wherein said means for freezing said adaptive component includes means for freezing an equalizer, a carrier phase tracking unit, an interpolator and an automatic gain control unit.

8. The system of claim 5 wherein said cellular communication system is used over an advanced mobile phone system cellular network.

9. An apparatus for use in an integrated cellular communication system, wherein said system communicates with a remote modem by radio waves through a base station and a telephone network, and wherein the system includes a data pump component, cellular transceiver component, a radio frequency transceiver component, and a system control unit, said data pump having an adaptive component that adjusts parameters of said data pump to match characteristics of said remote modem and a communication channel between the remote modem and the integrated cellular communication system, said data pump component being operatively connected to said cellular transceiver component which is in turn operatively connected to said radio frequency transceiver component, and wherein said system control unit is operatively connected to each of said components, and wherein said radio frequency transceiver component generates a RSSI signal, said apparatus comprising:

a monitor to monitor the RSSI signal;

a comparator, operatively connected to said monitor, to compare the monitored RSSI signal to a predetermined value; and

a controller, operatively connected to the comparator and the adaptive component, to freeze the adaptive component when the RSSI signal and the predetermined value are in a specified relationship, and to unfreeze the adaptive component when the RSSI is no longer in said specified relationship with the predetermined value such that said parameters of said data pump are substantially the same as at the time of freezing the adaptive component.

10. The apparatus of claim 9 wherein said relationship between said monitored RSSI signal and said predetermined value is that said monitored RSSI signal is lower in value than said predetermined value.

11. The apparatus of claim 9 wherein, when said controller freezes said adaptive component, said controller freezes at least one of an equalizer, a carrier phase tracking unit, an interpolator, and an automatic gain control unit within said adaptive component.

12. The apparatus of claim 9 wherein said cellular communication system is used over an advanced mobile phone system cellular network.

13. An apparatus comprising:

a sampler to sample an amplitude of a RSSI signal at predetermined intervals, said RSSI signal generated by radio frequency transceiver component in an integrated cellular communication system, said integrated cellular communication system to communicate with a remote modem by radio waves through a base station and a telephone network;

a comparator, operatively connected to the monitor, to compare the sampled amplitude at an interval with the sampled amplitude at a previous interval; and

a system control unit, operatively connected to the comparator and an adaptive component included in a data pump within the integrated cellular communication system, wherein the adaptive component adjusts parameters of the data pump to match characteristics of said remote modem and a communication channel between the remote modem and the integrated cellular communication system, said system control unit to freeze the adaptive component when the sampled amplitude decreases for n consecutive intervals, and to unfreeze the adaptive component when the RSSI is no longer in a specified relationship with a predetermined value such that said parameters of said data pump are substantially the same as at the time of freezing the adaptive component.

14. The apparatus of claim 13 wherein n is 3.

15. The apparatus of claim 13 wherein, when said system control unit freezes said adaptive component, said controller freezes at least one of an equalizer, a carrier phase tracking unit, an interpolator, and an automatic gain control unit within said adaptive component.

16. The apparatus of claim 13 wherein said cellular communication system is used over an advanced mobile phone system cellular network.