Apparatus and method of transmitting and receiving information in a wireless telecommunications system

• US 5,915,216 A
• Filed: 11/16/1995
• Issued: 06/22/1999
• Est. Priority Date: 06/02/1995
• Status: Expired due to Term

• Current Assignee: Monument Bank of Intellectual Property, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: DSC Communications Corp. (Nokia Corporation)
• Inventors: Lysejko, Martin
• Primary Examiner(s): Bost, Dwayne D.
• Assistant Examiner(s): WYCHE, MYRON
• Application Number:
  US08/558,665
• Time in Patent Office: 1,314 Days
• Field of Search: 379/58, 379/59, 379/60, 379/63, 379/61, 455/38.3, 455/127, 455/343, 455/88, 455/54.1, 455/403, 455/422, 455/455, 455/579, 455/436
• US Class Current: 455/422.1
• CPC Class Codes: G06F 9/546 Message passing systems or structures, e.g. queues
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/70735 Code identification H04B1/7083 takes precedence
• CPC Class Codes: H04B 1/7075 with code phase acquisition
• CPC Class Codes: H04B 1/7077 Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
• CPC Class Codes: H04B 1/70775 Multi-dwell schemes, i.e. multiple accumulation times
• CPC Class Codes: H04B 1/7085 using a code tracking loop, e.g. a delay-locked loop
• CPC Class Codes: H04B 2001/70706 using a code tracking loop, e.g. a delay locked loop
• CPC Class Codes: H04B 2201/70702 Intercell-related aspects
• CPC Class Codes: H04B 2201/70706 with means for reducing the peak-to-average power ratio
• CPC Class Codes: H04B 2201/7071 with dynamic control of receiver resources
• CPC Class Codes: H04B 2201/70711 with modular structure
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 3/0682 by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 41/0816 the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04Q 11/04 : for time-division multiplexing H04Q11/0001 takes precedence
• CPC Class Codes: H04Q 2213/1305 : Software aspects
• CPC Class Codes: H04Q 2213/13093 : Personal computer, PC
• CPC Class Codes: H04Q 2213/13098 : Mobile subscriber
• CPC Class Codes: H04Q 2213/13109 : Initializing, personal profile
• CPC Class Codes: H04Q 2213/1319 : Amplifier, attenuation circuit, echo suppressor
• CPC Class Codes: H04Q 2213/13196 : Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13199 : Modem, modulation
• CPC Class Codes: H04Q 2213/13202 : Network termination [NT]
• CPC Class Codes: H04Q 2213/13204 : Protocols
• CPC Class Codes: H04Q 2213/13216 : Code signals, frame structure
• CPC Class Codes: H04Q 2213/13292 : Time division multiplexing, TDM
• CPC Class Codes: H04Q 2213/13296 : Packet switching, X.25, frame relay
• CPC Class Codes: H04Q 2213/13298 : Local loop systems, access network
• CPC Class Codes: H04Q 2213/13299 : Bus
• CPC Class Codes: H04Q 2213/13335 : Simulation, emulation
• CPC Class Codes: H04Q 2213/13376 : Information service, downloading of information, 0800/0900 services
• CPC Class Codes: H04W 52/04 : TPC
• CPC Class Codes: H04W 52/08 : Closed loop power control
• CPC Class Codes: H04W 52/52 : using AGC [Automatic Gain Control] circuits or amplifiers
• CPC Class Codes: H04W 84/14 : WLL [Wireless Local Loop]; RLL [Radio Local Loop]

Abstract

A wireless telecommunications system (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subscriber terminal (20). A downlink signal (212) is transmitted from the transmitter (200) to the receiver (202) during setup and operation of the wireless telecommunications system (1). The wireless telecommunications system (1) operates in one of three operating modes. In an acquisition mode during establishment of the downlink communication path, the downlink signal (212) is transmitted at a high power level and a low transmit rate with the receiver (202) operating at the low transmit rate. In a standby mode after establishment of the downlink communication path, the downlink signal (212) is transmitted at a low power level and a low transmit rate with the receiver (202) operating at the low transmit rate. In a traffic mode upon a request for wireless communication transmission, the downlink signal (212) is transmitted at a high power level and a high transmit rate with the receiver (202) adjusting to operate at the high transmit rate. Upon completion of the wireless communication transmission, the wireless telecommunications system (1) returns to the standby mode and the receiver (202) adjusts to operate at the low transmit rate.

Claims

1. A method of transmitting information in a wireless telecommunications system, comprising the steps of:

transmitting a downlink signal at a first transmitting power and a first transmitting rate in an acquisition mode;

transmitting the downlink signal at a second transmitting power and the first transmitting rate in a standby mode upon completion of the acquisition mode, the second transmitting power being less than the first transmitting power.

2. The method of claim 1, further comprising the step of:

transmitting the downlink signal at the first transmitting power and a second transmitting rate in a traffic mode upon a request for a wireless telephone call.

3. The method of claim 1, wherein the downlink signal includes an overhead channel, a signalling channel, a first user channel, and a second user channel for the second transmitting rate.

4. The method of claim 3, wherein the second transmitting rate is 160 kilobits per second.

5. The method of claim 1, wherein the downlink signal includes an overhead channel for the first transmitting rate.

6. The method of claim 5, wherein the first transmitting rate is 10 kilobits per second.

7. The system of claim 6, wherein the transmitter transmits the downlink signal at the first transmitting power and a second transmitting rate upon a request for a wireless telephone call, the receiver operable to receive the downlink signal at the second transmitting rate.

8. The system of claim 7, wherein the transmitter transmitts the downlink signal in the standby mode at the second transmitting power and the the first transmitting rate in response to a sompletion of the wireless telephone call, the receiver operable to receive the downlink signal at the first transmitting rate.

9. The system of claim 8, wherein the first transmitting rate is at 10 kilobits per second, the downlink signal including only an overhead channel for the first transmitting rate.

10. The system of claim 7, wherein the second transmitting rate is at 160 kilobits per second, the downlink signal including an overhead channel, a signalling channel, a first user channel, and a second user channel for the second transmitting rate.

11. The system of claim 7, wherein the receiver simultaneously changes its operating rate with a change in the transmitting rate of the downlink signal at the transmitter.

12. The system of claim 9, wherein the second transmitting rate is at 10 kilobits per second, the downlink signal including an overhead channel, a signaling channel, a first user channel, and a second user channel for the second transmitting rate.

13. The subscriber terminal of claim 12, wherein the downlink signal has the second transmitting power and the first transmitting rate of the standby mode in response to a completion of the wireless communication transmission, the receiver adjusting to operate at the first transmitting rate in the standby mode.

14. The subscriber terminal of claim 12, wherein the receiver processes the downlink channel that includes an overhead channel, a signalling channel, a first user channel, and a second user channel for the second transmitting rate.

15. The subscriber terminal of claim 14, wherein the second transmitting rate of the downlink signal is 160 kilobits per second.

16. The subscriber terminal of claim 14, wherein the receiver processes the downlink signal that includes only the overhead channel for the first transmitting rate.

17. The subscriber terminal of claim 19, wherein the first transmitting rate of the downlink signal is 10 kilobits per second.