Techniques for reducing overhead in a communications system

• US 8,320,298 B2
• Filed: 01/22/2003
• Issued: 11/27/2012
• Est. Priority Date: 01/22/2002
• Status: Active Grant

• Current Assignee: IPR Licensing Incorporated (InterDigital, Inc.)
• Original Assignee: IPR Licensing Incorporated (InterDigital, Inc.)
• Inventors: Cornett, John B. Jr., Johnson, Kevin P., Nelson, George Rodney Jr.
• Primary Examiner(s): Jain, Raj K.
• Application Number:
  US10/350,309
• Publication Number:
  US 20030176191A1
• Time in Patent Office: 3,597 Days
• Field of Search: 370/326, 370/336
• US Class Current: 370/321
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/14 Separate analysis of uplink or downlink
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Parallel demodulators are provided in field units. Forward and reverse channel allocation information may be broadcast to the field units in the same epoch as traffic data but on first and second channels, such as paging and traffic channels. This assures that all field units are able to receive forward and reverse channel allocation information every epoch. By having parallel demodulators in the field unit, switching between the first and second channels is avoided and channel allocation information is not lost.

Claims

1. A mobile device comprising:

at least one processor configured to receive and transmit packet data in allocated time intervals;

wherein mobile devices are allocated forward link and reverse link resources on a time interval basis;

wherein each time interval includes at least one time slot;

wherein each time interval includes at least one forward link control channel and a forward link data channel;

wherein the forward link and reverse link allocations of time intervals are sent in the at least one forward link control channel of each time interval;

wherein the at least one processor is configured to determine whether the at least one forward link control channel has control information for the mobile device and to determine whether the control information for the mobile device is to receive or transmit packet data in one of the time intervals;

wherein in response to the control information being for the mobile device to transmit packet data, the at least one processor is configured to transmit the packet data a fixed number of time intervals after the time interval that the control information was received.

2. The mobile device of claim 1 wherein the at least one processor is configured to determine whether the at least one forward link control channel in each of the plurality of time intervals has control information for the mobile device by determining whether an identification of the mobile device is present in the control information.

3. The mobile device of claim 1 wherein the control information for the mobile device further includes power control information.

4. The mobile device of claim 1 wherein the packet data is IP packet data.

5. A method for receiving and transmitting in allocated time intervals of a plurality of time intervals by a mobile device in a wireless system that allocates forward link and reverse link resources on a time interval basis, the method comprising:

determining, by a mobile device, whether the at least one forward link control channel in one of the time intervals has control information for the mobile device and determining, by the mobile device, whether the control information for the mobile device is to receive or transmit packet data;

wherein each time interval includes at least one time slot;

wherein each time interval includes at least one forward link control channel and a forward link data channel; and

receiving and transmitting packet data, by the mobile device, in allocated time intervals, by the mobile device based on the control information;

wherein in response to the control information being for the mobile device to transmit packet data, the packet data is transmitted a fixed number of time intervals after the time interval that the control information was received.

6. The method of claim 5 wherein the determining, by a mobile device, whether the at least one forward link control channel in each of the received plurality of the time intervals has control information for the mobile device is performed by determining whether an identification of the mobile device is present in the control information.

7. The method of claim 5 wherein the control information for the mobile device further includes power control information.

8. The method of claim 5 wherein the packet data is IP packet data.

9. A base station comprising:

at least one processor configured to allocate forward link and reverse link resources on a time interval basis to a plurality of mobile devices;

wherein each time interval includes at least one time slot;

wherein the at least one processor is further configured to transmit in each time interval at least one forward link control channel and a forward link data channel;

wherein the at least one forward link control channel includes control information indicating an allocation of resources for at least one of the mobile devices; and

wherein the mobile devices are allocated the forward link and reverse link resources using the at least one forward link control channel in the plurality of time intervals;

wherein the at least one processor is configured to in response to transmitting an allocation of reverse link resources to a mobile device, to receive a reverse link transmission for the mobile device a fixed number of time intervals after the time interval that the allocation of reverse link resources was transmitted.

10. The base station of claim 9 wherein the at least one processor is further configured include with the control information in the at least one time slot, an identification associated with the mobile device being allocated the resources.

11. The base station of claim 9 wherein the control information in the at least one control channel includes power control information.

12. The base station of claim 9 wherein the packet data is IP packet data.