Method and Apparatuses for Data Transfer within a Relay Enhanced Telecommunication Network

• US 20120250526A1
• Filed: 11/03/2009
• Published: 10/04/2012
• Est. Priority Date: 11/03/2009
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Zhao, Zhu Yan, Redana, Simone, Raaf, Bernhard
• Granted Patent: US 8,953,476 B2
• Time in Patent Office: Days
• US Class Current: 370/243
• CPC Class Codes: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
• CPC Class Codes: H04B 7/15564 Relay station antennae loop interference reduction
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A method for scheduling a first user equipment, UE, with a first performance causing a first self interference of a relay system between a first access link extending between the relay system and the first UE and a relay link extending between the relay system and a base station, BS, and scheduling a second UE with a second performance causing a second self interference of the relay system between a second access link extending between the relay system and the second UE and the relay link extending between the relay system and the BS. Thereby, if the first self interference is larger than the second self interference, the first performance is smaller than the second performance. Alternatively, if the first self interference is smaller than the second self interference, the first performance is larger than the second performance.

Claims

1. Method for transferring data within a radio telecommunication network comprising a base station, a relay system, a first user equipment and a second user equipment, the method comprising

scheduling the first user equipment with a first performance causing a first self interference of the relay system between

a first access link extending between the relay system and the first user equipment and

a relay link extending between the relay system and the base station, and

scheduling the second user equipment with a second performance causing a second self interference of the relay system between

a second access link extending between the relay system and the second user equipment and

the relay link extending between the relay system and the base station,

wherein

(a) if the first self interference is larger than the second self interference the first performance is smaller than the second performance and

(b) if the first self interference is smaller than the second self interference the first performance is larger than the second performance.

2. The method as set forth in claim 1, wherein the first user equipment is served by the relay system with a first spatial radiation pattern and the second user equipment is served by the relay system with a second spatial radiation pattern being different from the first spatial radiation pattern, wherein first and the second radiation patterns cause different self interferences at the relay system.

3. The method as set forth in claim 1, wherein

the larger performance is achieved by employing a full duplex transmission mode and

the smaller performance is achieved by employing a half duplex transmission mode.

4. The method as set forth in claim 1, wherein

the larger performance is achieved by employing a first modulation and coding scheme and

the smaller performance is achieved by employing a second modulation and coding scheme.

5. The method as set forth in claim 1, wherein

the relay system comprises exactly one relay node which serves both the first user equipment and the second user equipment.

6. The method as set forth in claim 1, wherein

the relay system comprises two relay nodes, wherein a first relay node serves the first user equipment and the second relay node serves the second user equipment.

7. The method as set forth in claim 1, further comprising

determining the first self interference caused by scheduling the first user equipment and

determining the second self interference caused by scheduling the second user equipment.

8. The method as set forth in the preceding claim 7, further comprising

determining a first backhaul-to-access interference representing the radio interference between (a) the base station transmitting radio signals to the relay system and (b) the first user equipment receiving radio signals from the relay system and

determining a second backhaul-to-access interference (IF_BS-UE) representing the radio interference between (a) the base station transmitting radio signals to the relay system and (b) the second user equipment receiving radio signals from the relay system, wherein the first performance and/or the second performance depend on the determined first backhaul-to-access interference and on the determined second backhaul-to-access interference (IF_BS-UE).

9. The method as set forth in claim 7, further comprising

generating a radio transmission resource partitioning information based on measurement values representing (a) the first self interference (IFUL_RN-RN, IFDL_RN-RN) and the second self interference, and/or (b) the first backhaul-to-access interference (IF_BS-UE) and the second backhaul-to-access interference, and

reporting the radio transmission resource partitioning information to the relay system.

10. The method as set forth in claim 7, further comprising

determining a first access-to-backhaul interference (IF_UE BS) representing the radio interference between (a) the first user equipment transmitting radio signals to the relay system and (b) the base station receiving radio signals from the relay system and

determining a second access-to-backhaul interference representing the radio interference between (a) the second user equipment transmitting radio signals to the relay system and (b) the base station receiving radio signals from the relay system,

wherein the first performance and/or the second performance depend on the determined first access-to-backhaul interference (IF_UE-BS) and on the determined second access-to-backhaul interference.

11. The method as set forth in claim 10, further comprising

generating an improved radio transmission resource partitioning information based on measurement values representing

(a) the determined first self interference (IFUL_RN-RN, IFDL_RN-RN) and the determined second self interference,

(b) the determined first backhaul-to-access interference (IF_BS-UE) and the determined second backhaul-to-access interference, and

(c) the determined first access-to-backhaul interference (IF_UE-BS) and the determined second access-to-backhaul interference, and

partitioning the available radio transmission resource in accordance with the generated improved radio transmission resource partitioning information.

12. The method as set forth in claim 1, further comprising

configuring sub-frames as normal data sub-frames instead of MBSFN sub-frames, if

the first and the second self interference and the first and the second backhaul-to-access interference are smaller than a predetermined work point of the relay system.

13. A relay system for transferring data within a radio telecommunication network comprising a base station, the relay system, a first user equipment and a second user equipment, the relay system comprising

a first scheduling unit for scheduling the first user equipment with a first performance causing a first self interference of the relay system between

a first access link extending between the relay system and the first user equipment and

a relay link extending between the relay system and the base station, and

a second scheduling unit for scheduling the second user equipment with a second performance causing a second self interference of the relay system between

a second access link extending between the relay system and the second user equipment and

the relay link extending between the relay system and the base station,

wherein

(a) if the first self interference is larger than the second self interference the first performance is smaller than the second performance and

(b) if the first self interference is smaller than the second self interference the first performance is larger than the second performance.

14. A base station for transferring data within a radio telecommunication network comprising the base station, a relay system, a first user equipment and a second user equipment, the base station comprising

a first scheduling unit for scheduling the first user equipment with a first performance causing a first self interference of the relay system between

a first access link extending between the relay system and the first user equipment and

a relay link extending between the relay system and the base station,

a second scheduling unit for scheduling the second user equipment with a second performance causing a second self interference of the relay system between

a second access link extending between the relay system and the second user equipment and

the relay link extending between the relay system and the base station,

wherein

(a) if the first self interference is larger than the second self interference the first performance is smaller than the second performance and

(b) if the first self interference is smaller than the second self interference the first performance is larger than the second performance.