Wireless communications system and method

• US 8,718,657 B2
• Filed: 01/11/2012
• Issued: 05/06/2014
• Est. Priority Date: 10/26/2001
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Naden, James M., Ward, Chris, Jeffries, Andrew W.
• Primary Examiner(s): Appiah, Charles
• Assistant Examiner(s): COSME, NATASHA W
• Application Number:
  US13/347,879
• Publication Number:
  US 20120149420A1
• Time in Patent Office: 846 Days
• Field of Search: 455/447
• US Class Current: 455/447
• CPC Class Codes: H04B 1/7097 Interference-related aspects
• CPC Class Codes: H04B 2201/70702 Intercell-related aspects
• CPC Class Codes: H04W 16/06 Hybrid resource partitioning, e.g. channel borrowing
• CPC Class Codes: H04W 16/32 Hierarchical cell structures

Abstract

A mobile communications system having improved spectral efficiency, and methods and apparatus to achieve this improved spectral efficiency. In the mobile communications system communication with a plurality of mobile terminals is provided by a base station. Within the system terminals are adapted to communicate with one or more adjacent similar terminals to establish groups of terminals, called micro-cells. Each terminal within a micro-cell receives signals from the base station and then performs a first processing step on these signals. These processed signals are shared with all the other terminals within the micro-cell. Each terminal then performs a second processing step on the information it has received from all the other terminals within the micro-cell which enables it to derive a signal intended for reception by that terminal. The technique is applicable to both the uplink and the down link and also to peer to peer communication.

Claims

1. A method of forming a micro-cell for communicating transmission related signal information in a mobile communications system, said micro-cell comprising a plurality of mobile terminals adapted to communicate with one another in a peer to peer manner, the method comprising:

directly receiving signals at each of said terminals from a plurality of adjacent similar terminals;

each said terminal monitoring the strength of signals received from the plurality of adjacent similar terminals via the base station and selecting terminals with the highest received signal strength to operate within said micro-cell; and

exchanging transmission related information of the signals among the selected terminals.

2. A method for receiving communications from a base station, comprising:

a first terminal communicating with one or more adjacent terminals to establish a group of terminals, wherein the group of terminals is configured to operate cooperatively to receive communications from the base station;

the first terminal receiving first signals from the base station, wherein the first signals correspond to original signals transmitted by the base station, wherein the original signals are intended for reception by the first terminal;

the first terminal receiving first signal information directly from a second terminal of the group of terminals, wherein the first signal information is derived from second signals received by the second terminal that correspond to the original signals transmitted by the base station;

the first terminal performing signal spatial processing of the first signals using the first signal information in order to derive the original signals;

the first terminal receiving third signals from the base station, wherein the third signals correspond to second original signals transmitted by the base station, wherein the second original signals are intended for reception by the second terminal;

the first terminal processing the third signals to produce second signal information related to the second original signals;

the first terminal providing the second signal information to the second terminal;

wherein the second terminal is configured to receive fourth signals from the base station, wherein the fourth signals correspond to the second original signals transmitted by the base station, wherein the second terminal is further configured to perform spatial processing of the fourth signals using the second signal information in order to derive the second original signals.

3. The method of claim 2, wherein the first and second signals are transmitted using a first spreading sequence and wherein the third and fourth signals are transmitted using a second spreading sequence.

4. The method of claim 2, further comprising:

the first terminal receiving third signal information from a third terminal of the group of terminals, wherein the third signal information is derived from fifth signals received by the third terminal that correspond to the original signals transmitted by the base station;

wherein said performing signal spatial processing of the first signals in order to derive the original signals is also based on the third signal information.

5. A terminal, comprising:

a first radio for communicating with base stations using a first wireless protocol;

a second radio for communicating with other terminals using a second wireless protocol;

logic for controlling communication of the terminal, wherein the logic is configured to;

communicate with one or more adjacent terminals using the second radio to establish a group of terminals, wherein the group of terminals is configured to operate cooperatively to receive communications from the base station;

receive first signals from the base station using the first radio, wherein the first signals correspond to original signals transmitted by the base station, wherein the original signals are intended for reception by the first terminal;

receive first signal information directly from a second terminal of the group of terminals using the second radio, wherein the first signal information is derived from second signals received by the second terminal that correspond to the original signals transmitted by the base station;

perform signal spatial processing of the first signals using the first signal information in order to derive the original signals;

receive third signals from the base station using the first radio, wherein the third signals correspond to second original signals transmitted by the base station, wherein the second original signals are intended for reception by the second terminal;

process the third signals to produce second signal information related to the second original signals;

provide the second signal information to the second terminal using the second radio;

receive fourth signals from the base station using the first radio, wherein the fourth signals correspond to the second original signals transmitted by the base station, wherein the second terminal is further configured to perform spatial processing of the fourth signals using the second signal information in order to derive the second original signals.

6. The terminal of claim 5, wherein the first and second signals are transmitted using a first spreading sequence and wherein the third and fourth signals are transmitted using a second spreading sequence.

7. The terminal of claim 5, wherein the logic is further configured to:

receive third signal information from a third terminal of the group of terminals using the second radio, wherein the third signal information is derived from fifth signals received by the third terminal that correspond to the original signals transmitted by the base station;

wherein said performing signal spatial processing of the first signals in order to derive the original signals is also based on the third signal information.

8. A non-transitory, computer accessible memory medium storing program instructions for a first terminal receiving communications from a base station, wherein the program instructions are executable to:

communicate with one or more adjacent terminals to establish a group of terminals, wherein the group of terminals is configured to operate cooperatively to receive communications from the base station;

receive first signals from the base station, wherein the first signals correspond to original signals transmitted by the base station, wherein the original signals are intended for reception by the first terminal;

receive first signal information directly from a second terminal of the group of terminals, wherein the first signal information is derived from second signals received by the second terminal that correspond to the original signals transmitted by the base station;

perform signal spatial processing of the first signals using the first signal information in order to derive the original signals;

receive third signals from the base station, wherein the third signals correspond to second original signals transmitted by the base station, wherein the second original signals are intended for reception by the second terminal;

process the third signals to produce second signal information related to the second original signals;

provide the second signal information to the second terminal;

wherein the second terminal is configured to receive fourth signals from the base station, wherein the fourth signals correspond to the second original signals transmitted by the base station, wherein the second terminal is further configured to perform spatial processing of the fourth signals using the second signal information in order to derive the second original signals.

9. The non-transitory, computer accessible memory medium of claim 8, wherein the first and second signals are transmitted using a first spreading sequence and wherein the third and fourth signals are transmitted using a second spreading sequence.

10. The non-transitory, computer accessible memory medium of claim 8, wherein the program instructions are further executable to:

receive third signal information from a third terminal of the group of terminals, wherein the third signal information is derived from fifth signals received by the third terminal that correspond to the original signals transmitted by the base station;

wherein said performing signal spatial processing of the first signals in order to derive the original signals is also based on the third signal information.

11. A method for receiving communications from a base station, comprising:

a first terminal communicating with one or more adjacent terminals to establish a group of terminals, wherein the group of terminals is configured to operate cooperatively to receive communications from the base station;

the first terminal receiving first signals from the base station, wherein the first signals correspond to original signals transmitted by the base station, wherein the original signals are intended for reception by a second terminal of the group of terminals;

the first terminal processing the first signals to produce first signal information related to the first signals;

the first terminal providing the first signal information directly to the second terminal of the group of terminals;

wherein the second terminal is configured to receive second signals from the base station, wherein the second signals correspond to the original signals transmitted by the base station, wherein the second terminal is further configured to perform spatial processing of the second signals using the first signal information in order to derive the original signals;

the first terminal receiving third signals form the base station, wherein the third signals correspond to second original signals transmitted by the base station, wherein the second original signals are intended for reception by a third terminal of the group of terminals;

the first terminal processing the third signals to produce second signal information related to the third signals;

the first terminal providing the second signal information directly to the third terminal of the group of terminals;

wherein the third terminal is configured to receive fourth signals from the base station, wherein the fourth signals correspond to the second original signals transmitted by the base station, wherein the third terminal is further configured to perform spatial processing of the fourth signals using the second signal information in order to derive the second original signals.

12. The method of claim 11, wherein the first signals are encoded using a first spreading sequence, wherein signals intended for other terminals are encoded in other respective spreading sequences.

13. A terminal, comprising:

a first radio for communicating with base stations using a first wireless protocol;

a second radio for communicating with other terminals using a second wireless protocol;

logic for controlling communication of the terminal, wherein the logic is configured to;

communicate with one or more adjacent terminals using the second radio to establish a group of terminals, wherein the group of terminals is configured to operate cooperatively to receive communications from the base station;

receive first signals from the base station using the first radio, wherein the first signals correspond to original signals transmitted by the base station, wherein the original signals are intended for reception by a second terminal of the group of terminals;

process the first signals to produce first signal information related to the first signals;

provide the first signal information directly to the second terminal of the group of terminals using the second radio;

wherein the second terminal is configured to receive second signals from the base station, wherein the second signals correspond to the original signals transmitted by the base station, wherein the second terminal is further configured to perform spatial processing of the second signals using the first signal information in order to derive the original signals;

receive third signals from the base station using the first radio, wherein the third signals correspond to second original signals transmitted by the base station, wherein the second original signals are intended for reception by a third terminal of the group of terminals;

process the third signals to produce second signal information related to the third signals;

provide the second signal information directly to the third terminal of the group of terminals using the second radio;

wherein the third terminal is configured to receive fourth signals from the base station, wherein the fourth signals correspond to the second original signals transmitted by the base station, wherein the third terminal is further configured to perform spatial processing of the fourth signals using the second signal information in order to derive the second original signals.

14. The terminal of claim 13, wherein the first signals are encoded using a first spreading sequence, wherein signals intended for other terminals are encoded in other respective spreading sequences.

15. A non-transitory, computer accessible memory medium storing program instructions for a first terminal assisting in receiving communications from a base station, wherein the program instructions are executable to:

communicate with one or more adjacent terminals to establish a group of terminals, wherein the group of terminals is configured to operate cooperatively to receive communications from the base station;

receive first signals from the base station, wherein the first signals correspond to original signals transmitted by the base station, wherein the original signals are intended for reception by a second terminal of the group of terminals;

process the first signals to produce first signal information related to the first signals;

provide the first signal information directly to the second terminal of the group of terminals;

wherein the second terminal is configured to receive second signals from the base station, wherein the second signals correspond to the original signals transmitted by the base station, wherein the second terminal is further configured to perform spatial processing of the second signals using the first signal information in order to derive the original signals;

receive third signals form the base station, wherein the third signals correspond to second original signals transmitted by the base station, wherein the second original signals are intended for reception by a third terminal of the group of terminals;

process the third signals to produce second signal information related to the third signals;

provide the second signal information directly to the third terminal of the group of terminals;

wherein the third terminal is configured to receive fourth signals from the base station, wherein the fourth signals correspond to the second original signals transmitted by the base station, wherein the third terminal is further configured to perform spatial processing of the fourth signals using the second signal information in order to derive the second original signals.

16. The non-transitory, computer accessible memory medium of claim 15, wherein the first signals are encoded using a first spreading sequence, wherein signals intended for other terminals are encoded in other respective spreading sequences.

17. A method of forming a micro-cell for communicating transmission related signal information in a Mobile communications system, said micro-cell comprising a plurality of mobile terminals adapted to communicate with one another in a peer to peer manner, the method comprising:

directly receiving signals at a first terminal from a plurality of adjacent similar terminals;

the first terminal monitoring the strength of signals received from the plurality of adjacent similar terminals via the base station and selecting terminals with the highest received signal strength to operate within said micro-cell; and

the first terminal exchanging transmission related information of the signals among the selected terminals.