METHOD AND APPARATUS FOR COOPERATIVE WIRELESS COMMUNICATIONS

• US 20090175214A1
• Filed: 12/31/2008
• Published: 07/09/2009
• Est. Priority Date: 01/02/2008
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Manseta, Khushali N., Hu, Ruiyuan, Sammour, Mohammed, Reznik, Alexander, Chitrapu, Prabhakar R., Zhang, Guodong, Shah, Yogendra C., Beluri, Mihaela C., Pinheiro, Ana Lucia, Ye, Chunxuan, Lin, Zinan, Sfar, Sana, Charlton, Gregg A.
• Granted Patent: US 8,917,649 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/026 Co-operative diversity, e.g. using fixed or mobile stations as relays
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04B 7/15592 Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path cooperative diversity H04B7/024
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 67/303 Terminal profiles
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 4/38 for collecting sensor information
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A method and apparatus for cooperation in wireless communications. Cooperation is considered among a number of network elements, including at least one wireless transmit-receive unit, at least one relay station, and at least one base station.

Claims

1. A method for wireless communications comprising:

splitting a message into a first portion and a second portion;

transmitting the first portion of the message directly to a base station at a first frequency; and

transmitting the second portion of the message to a base station by way of a relay station at a second frequency.

2. A method for wireless communications comprising:

using a rateless 2-hop scheme at a wireless transmit/receive unit (WTRU);

receiving a first plurality of information bits from a base station during a first phase of the communication;

decoding the received first plurality of information bits;

receiving a second plurality of information bits from a relay station during a second phase of the communication, wherein the second plurality of information bits are the remaining bits that the WTRU did not decode in the first phase.

3. The method of claim 2 further comprising:

using a distributed antenna scheme, wherein the WTRU receives different information bits from the base station and the relay station simultaneously; and

the WTRU using successive interference cancellation to distinguish between the different information bits.

4. A method for wireless communications comprising:

receiving a message intended for a wireless transmit/receive unit (WTRU);

decoding the message;

recoding the message; and

retransmitting the recoded message to the intended WTRU.

5. A wireless transmit/receive unit (WTRU) for use wireless cooperative communications comprising:

a processor configured to split a message into a first portion and a second portion;

a transmitter configured to transmit the first portion of the message to a base station at a first frequency and transmit the second portion of the message to a relay station at a second frequency.

6. A wireless transmit/receive unit (WTRU) for wireless cooperative communications comprising:

a receiver configured to receive a first plurality of information bits from a base station during a first phase of the communication and a second plurality of information bits from a relay station during a second phase of the communication; and

a processor configured to decode the received first plurality of information bits;

wherein the second plurality of information bits are the remaining bits that the WTRU did not decode in the first phase.

7. The WTRU of claim 6 further comprising:

a distributed antenna scheme configured to receive different information bits from the base station and the relay station simultaneously; and

wherein the processor uses successive interference cancellation to distinguish between the different information bits.

8. A relay station for use in wireless cooperative communications comprising:

a receiver configured to receive a message intended for a wireless transmit/receive unit (WTRU);

a processor configured to decode and recode the message; and

a transmitter configured to retransmit the recoded message to the intended WTRU.