Abstract
Since common E-DCH resources may be assigned from a single Node B, uplink macro-diversity may not be possible between neighboring Node Bs. In addition, a user equipment (UE) assigned a common E-DCH resource may not be allowed to perform cell reselection. Thus, maintaining the assignment of a common E-DCH resource to a given UE for more than a few hundred milliseconds may result in unacceptable inter-cell interference, for example, when the UE moves closer to a neighboring cell controlled by a non-serving Node B. To overcome inter-cell interference and allow a more extensive utilization of the Cell_FACH state, a method may be used to detect and/or control inter-cell interference.
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3G | 30/11/2012 | ISLD-201210-008 | INTERDIGITAL INC |
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Claim
A method for detecting inter-cell interference, the method comprising:
obtaining, via a WTRU, a set of characteristics that identifies interference to a common enhanced dedicated cannel (E-DCH) resource; determining a condition to apply an interference indication; and receiving the interference indication using the set of characteristics of the interference.
2. The method of claim 1, wherein receiving the interference indication using the set of characteristics occurs when the condition is met.
3. The method of claim 1, further comprising applying the interference indication when the condition is met.
4. The method of claim 1, wherein receiving the interference indication comprises receiving the interference indication from an enhanced relative grant channel (E-RGCH) using the set of characteristics.
5. The method of claim 1, wherein obtaining a set of characteristics comprises receiving a mapping between the common E-DCH resource and the set of characteristics.
6. The method of claim 1, wherein obtaining a set of characteristics comprises receiving characteristics for all common E-DCH resources.
7. The method of claim 1, wherein obtaining a set of characteristics comprises receiving characteristics for a subset of common E-DCH resources.
8. The method of claim 1, wherein the set of characteristics comprises a signature sequence and a channelization code.
9. The method of claim 1, wherein determining a condition to apply the interference indication comprises determining a signal level or signal quality that should be met or exceeded.
10. The method of claim 1, wherein determining a condition to apply the interference indication comprises determining a signal level or signal quality of a reference signal that is transmitted should meet or exceed.
11. The method of claim 1, wherein determining a condition to apply the interference indication comprises determining a signal level or signal quality that a victim cell signal should meet or exceed.
12. The method of claim 1, wherein the interference indication indicates that a victim cell is experiencing inter-cell interference.
13. A method of controlling inter-cell interference, the method comprising:
obtaining, via a WTRU, a set of characteristics that identifies interference to a common enhanced dedicated cannel (E-DCH) resource; receiving an interference indication using the set of characteristics of the interference; and applying the interference indication when a condition is met.
14. The method of claim 13, wherein applying the interference indication comprises reducing a grant.
15. The method of claim 13, wherein applying the interference indication comprises reducing a maximum enhanced dedicated physical data channel (E-DPDCH) power.
16. The method of claim 13, wherein applying the interference indication comprises ceasing to transmit on E-DPDCH.
17. The method of claim 13, wherein applying the interference indication comprises deactivating a hybrid automatic repeat request (HARQ) process that was used in a previous transmission.
18. The method of claim 13, wherein receiving the interference indication using the set of characteristics occurs when the condition is met.
19. A wireless transmit/receive unit (WTRU) for detecting inter-cell interference, the WTRU comprising:
a receiver configured to obtain a set of characteristics for an interference applicable to a common enhanced dedicated cannel (E-DCH) resource; and a processor configured to:
determine a condition to apply an interference indication; and
receive the interference indication using the set of characteristics of the interference.
20. The WTRU claim 19, wherein the processor determines a condition to apply the interference indication comprises determining a signal level or signal quality that should be met or exceeded.
Associated Portfolios
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.