Use of control channel information to enhance data throughput of an integrated cellular communication system

• US 5,862,491 A
• Filed: 10/13/1997
• Issued: 01/19/1999
• Est. Priority Date: 02/13/1995
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Nair, N. Gopalan, Brun, Zdenek A.
• Primary Examiner(s): VO, NGUYEN THANH
• Application Number:
  US08/950,510
• Time in Patent Office: 463 Days
• Field of Search: 455/186.1, 455/343, 455/38.3, 455/67.1, 455/232.1, 455/234.1, 455/234.2, 455/422, 455/557, 455/552, 455/553, 375/222
• US Class Current: 455/557
• CPC Class Codes: H04L 2025/03802 Signalling on the reverse channel
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/30 Connection release

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. Before interrupting the channel, the cellular communication system may also transmit a command to a data pump of a remote modem so that the remote modem can initiate an appropriate process to maintain the parameters of its adaptive components at a converged state or to adjust the parameters continuously during the channel interruption. The cellular communication system may also acknowledge receiving the control channel signal before the channel is interrupted.

Claims

1. A method of operating an integrated cellular communication system communicatively coupled to a base station, said system including a system control unit coupled to a data pump, a cellular transceiver and a radio transceiver, said data pump coupled to said cellular transceiver, said cellular transceiver coupled to said radio transceiver, and wherein said system control unit controls said data pump, said cellular transceiver, and said radio transceiver, said method comprising the steps of:

at said cellular transceiver, detecting a control channel signal from said base station, said control channel signal indicating that a channel interruption is to occur;

at said cellular transceiver, decoding said control channel signal to a decoded control channel signal;

sending said decoded control channel signal to said system control unit;

controlling parameters of adaptive components of said data pump so that said parameters remain at the last state before said channel interruption;

interrupting a channel; and

re-establishing said channel.

2. A method according to claim 1 further comprising the steps of:

transmitting a command to a data pump of a second communication system, said command communicating a state that said channel interruption is to occur to said second communication system; and

acknowledging said control channel signal before the step of interrupting said channel,

wherein re-establishing data transmission requires a less retraining time period than re-establishing data transmission without the step of controlling parameters of adaptive components.

3. A method according to claim 2 wherein said parameters remain at said last state during the steps of transmitting and acknowledging.

4. A method according to claim 1 wherein said control channel signal includes a dotting pattern.

5. A method according to claim 1 wherein the time period between the step of detecting said control channel signal and the step of interrupting said channel is not greater than 100 msec.

6. A method according to claim 1 wherein said cellular communication system is used over an advanced mobile phone system (AMPS) cellular network.

7. A method according to claim 1 wherein said parameters remain at said last state during the step of interrupting.

8. A method according to claim 1 wherein said step of controlling said parameters includes the step of controlling the parameters of an equalizer, a carrier phase tracking unit, an interpolator and an automatic gain control.

9. A method of operating a cellular communication system, said system including a system control unit coupled to a data pump, a cellular transceiver and a radio transceiver, said data pump coupled to said cellular transceiver, said cellular transceiver coupled to said radio transceiver, wherein said system control unit controls said data pump, said cellular transceiver, and said radio transceiver said method comprising the steps of:

at said cellular transceiver, detecting a control channel signal, said control channel signal indicating that a channel interruption is to occur;

at said cellular transceiver, decoding said control channel signal to a decoded control channel signal;

sending said decoded control channel signal to said system control unit;

continuously adjusting parameters of adaptive components of said data pump so that said parameters are adjusted even during said channel interruption;

interrupting a channel; and

re-establishing said channel without retraining said adaptive components of said data pump.

10. A method according to claim 9 further comprising the steps of:

transmitting a command to a data pump of a second communication system, said command communicating a state that said channel interruption is to occur to said second communication system; and

acknowledging said channel interruption before the step of interrupting said channel.

11. A method according to claim 10 wherein said parameters are adjusted continuously during the steps of detecting, decoding, sending, transmitting, acknowledging and re-establishing.

12. A method according to claim 11 wherein said parameters are adjusted continuously during the step of interrupting so that the parameters are adapted to characteristic changes that occur in a channel.

13. A method according to claim 9 wherein said adaptive components are adjusted at tracked rates.

14. A method according to claim 9 wherein said step of adjusting said parameters includes the step of adjusting the parameters of an equalizer, a carrier phase tracking unit, an interpolator and an automatic gain control.