Method and apparatus for providing acknowledgement information to radio communication devices in a wireless communication system

• US 9,065,645 B2
• Filed: 09/27/2012
• Issued: 06/23/2015
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Yang, Yunhai, McDonald, Daniel J., Shahaf, Mark
• Primary Examiner(s): Alia, Curtis A
• Application Number:
  US13/629,510
• Publication Number:
  US 20140086216A1
• Time in Patent Office: 999 Days
• Field of Search: 370/276, 370/277, 370/278, 370/280, 370/282, 370/294, 370/295, 370/310, 370/311, 370/312, 370/328, 370/458
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence

Abstract

A method and apparatus for providing acknowledgment information for radio communication devices in a wireless communication system. A base station receives a plurality of units of data each respectively transmitted by one of a plurality of radio communication devices on one of a plurality of predetermined communication slot positions of a first channel. The base station, in response to receiving the data messages, sends a control message on a communication slot position of a second channel. The control message includes acknowledgment information having a plurality of positional acknowledgment indicators. Each radio communication device receives the control message and uses acknowledgment position mapping information to identify one or more positions within the plurality of positional acknowledgment indicators that contains an acknowledgment to the respective units of data it transmitted on the corresponding predetermined communication slot positions of the first channel.

Claims

1. A method of operating a base station to provide acknowledgment information for radio communication devices in a time division multiple access (TDMA) wireless communication system, the method comprising:

receiving a plurality of units of data, each unit of data respectively transmitted by one of a plurality of radio communication devices on one of a plurality of predetermined communication TDMA slot positions of a first channel;

generating a control message to include acknowledgment information having a plurality of time-division positional acknowledgment indicators and an acknowledgment position mapping information, wherein each time-division positional acknowledgment indicator respectively indicates an acknowledgment corresponding to the unit of data transmitted on a respective one of the plurality of predetermined communication TDMA slot positions of the first channel, and wherein the acknowledgment position mapping information maps a position of each time-division positional acknowledgment indicator to a position of each predetermined communication TDMA slot position within the plurality of predetermined communication TDMA slot positions of the first channel; and

transmitting the control message including the acknowledgment information having the plurality of time-division positional acknowledgment indicators on one communication TDMA slot position of a second channel;

wherein the control message further includes scheduling information for scheduling new transmissions or retransmissions from one or more radio communication devices on future TDMA slot positions of the first channel;

wherein the scheduling information schedules “

n”

number of future communication TDMA slot positions on the first channel; and

wherein the time-division positional acknowledgment indicators indicates an acknowledgment of an integer multiple of “

n”

number of past communication TDMA slot positions on the first channel.

2. The method of claim 1, wherein each radio communication device after transmitting its one or more units of data respectively on one or more of the predetermined communication TDMA slot positions of the first channel, switches to the second channel to receive the control message including the acknowledgment information and the acknowledgment position mapping information on the one communication TDMA slot position of the second channel.

3. The method of claim 1, wherein each radio communication device uses the acknowledgment position mapping information to identify one or more positions within the plurality of time-division positional acknowledgment indicators that contains an acknowledgment indicating whether or not the one or more units of data transmitted respectively on one or more of the plurality of predetermined communication TDMA slot positions were successfully received.

4. The method of claim 1, wherein generating the control message further comprises representing each time-division positional acknowledgment indicator within the acknowledgment information by one bit of data to acknowledge whether or not the unit of data transmitted on a respective one of the plurality of predetermined communication TDMA slot positions was successfully received.

5. The method of claim 1, wherein the acknowledgment information does not contain information other than the plurality of time-division positional acknowledgment indicators and the acknowledgement position mapping information.

6. The method of claim 1, wherein the acknowledgment information does not contain a unique identifier for any of the plurality of radio communication devices that maps one or more time-division positional acknowledgment indicators to a particular radio communication device.

7. A method of operating a radio communication device to recover acknowledgment information in a time division multiple access (TDMA) wireless communication system, the method comprising:

transmitting one or more units of data respectively on one or more of a plurality of predetermined communication TDMA slot positions of a first channel;

switching to a second channel and identifying one communication TDMA slot position of the second channel to receive a control message including acknowledgment information having a plurality of time-division positional acknowledgment indicators and an acknowledgment position mapping information, each time-division positional acknowledgment indicator respectively indicating an acknowledgment corresponding to each of the one or more units of data transmitted on respective ones of the plurality of predetermined communication TDMA slot positions of the first channel;

using the acknowledgment position mapping information to identify one or more positions within the plurality of time-division positional acknowledgment indicators, wherein the acknowledgment position mapping information maps a position of each time-division positional acknowledgment indicators within the acknowledgment information to a position of each predetermined communication TDMA slot position within the plurality of predetermined communication TDMA slot positions; and

determining, from one or more time-division positional acknowledgment indicators corresponding to the identified one or more positions, an acknowledgment indicating whether or not the one or more units of data transmitted respectively on one or more of the plurality of predetermined communication TDMA slot positions were successfully received;

wherein the control message further includes scheduling information for scheduling new transmissions or retransmissions from one or more radio communication devices on future TDMA slot positions on the first channel;

wherein the scheduling information schedules “

n”

number of future communication TDMA slot positions on the first channel; and

wherein the time-division positional acknowledgment indicators indicates an acknowledgment of an integer multiple of “

n”

number of past communication TDMA slot positions on the first channel.

8. The method of claim 7, wherein each time-division positional acknowledgment indicator within the acknowledgment information is respectively represented by one bit of data to acknowledge whether or not the unit of data transmitted on a respective one of the plurality of predetermined communication TDMA slot positions of the first channel was successfully received.

9. The method of claim 7, wherein the acknowledgment information does not contain information other than the plurality of time-division positional acknowledgment indicators and the acknowledgement position mapping information.

10. The method of claim 7, wherein the acknowledgment information does not contain a unique identifier of the radio communication device that maps one or more time-division positional acknowledgment indicators to the radio communication device.

11. The method of claim 7, further comprising configuring the radio communication device to monitor communication TDMA slot positions of the second channel to receive the control message that includes the acknowledgment information.

12. The method of claim 7, further comprising periodically receiving the acknowledgment information having a plurality of time-division positional acknowledgment indicators on one communication TDMA slot position of the second channel a predetermined number of times.

13. An apparatus for providing acknowledgment information for radio communication devices in a time division multiple access (TDMA) wireless communication system, the apparatus comprising:

a wireless transceiver configured to simultaneously operate on a first channel and a second channel, wherein the wireless transceiver operates on the first channel to receive a plurality of units of data, each unit of data respectively transmitted by one of a plurality of radio communication devices on one of a plurality of predetermined communication TDMA slot positions of the first channel; and

a processor coupled to the wireless transceiver and configured to;

generate a control message to include acknowledgment information having a plurality of time-division positional acknowledgment indicators and an acknowledgment position mapping information, wherein each acknowledgment indicator respectively indicates an acknowledgment corresponding to the unit of data transmitted on a respective one of the plurality of predetermined communication TDMA slot positions of the first channel, and wherein the acknowledgment position mapping information maps a position of each time-division positional acknowledgment indicator to a position of each predetermined communication TDMA slot position within the plurality of predetermined communication TDMA slot positions of the first channel; and

cause the wireless transceiver to transmit the control message including the acknowledgment information having the plurality of time-division positional acknowledgment indicators on one communication TDMA slot position of the second channel, and

wherein the control message further includes scheduling information for scheduling new transmission or retransmissions from one or more radio communication devices on future TDMA slot positions on the first channel;

wherein the scheduling information schedules “

n”

number of future communication TDMA slot positions on the first channel; and

wherein the time-division positional acknowledgment indicators indicates an acknowledgment of an integer multiple of “

n”

number of past communication TDMA slot positions on the first channel.