Managing allocation of frequency bandwidth between donor access link and relay backhaul link

• US 9,232,516 B1
• Filed: 01/03/2014
• Issued: 01/05/2016
• Est. Priority Date: 01/03/2014
• Status: Active Grant

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Oroskar, Siddharth S., Shah, Maulik K., Singh, Jasinder P.
• Primary Examiner(s): Khan, Mehmood B
• Application Number:
  US14/147,140
• Time in Patent Office: 732 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

A method and system for allocating frequency bandwidth between a relay backhaul link and a donor access link, based at least in part on the PLMN(s) to which UE(s) served by the relay node subscribe. The donor base station or another controlling entity may determine the PLMN(s) to which one or more UEs currently served by the relay node subscribe and, based at least in part on the determined PLMN(s), may assign a PLMN-priority level to the relay. Based at least in part on the PLMN-priority level assigned to the relay, the controlling entity may then establish an allocation of the frequency bandwidth between the relay backhaul link and the donor access link, and the donor base station may apply that established allocation.

Claims

1. In a wireless communication system in which a donor base station is configured to serve user equipment devices (UEs) over a donor access link and is configured to serve a relay node over a relay backhaul link, and in which the relay node is configured to serve UEs over a relay access link, a method of allocating frequency bandwidth between the relay backhaul link and the donor access link, the method comprising:

assigning one or more first public land mobile network (PLMN)-priority weights to one or more UEs served over the relay access link by the relay node, wherein the one or more first PLMN-priority weights includes, for each of the one or more UEs served over the relay access link by the relay node, a respective first PLMN-priority weight based on a priority level of a PLMN to which the UE subscribes;

assigning one or more second PLMN-priority weights to one or more UEs served over the donor access link by the donor base station, wherein the one or more second PLMN-priority weights includes, for each of the one or more UEs served over the donor access link by the donor base station, a respective second PLMN-priority weight based on a priority level of a PLMN to which the UE subscribes;

comparing (i) a representative relay priority level based on the assigned one or more first PLMN-priority weights with (ii) a representative donor access priority level based on the assigned one or more second PLMN-priority weights;

establishing an allocation of the frequency bandwidth between the relay backhaul link and the donor access link based on the comparing of the representative relay priority level with the representative donor access priority level; and

applying the established allocation.

2. The method of claim 1,

wherein the representative relay priority level based on the assigned one or more first PLMN-priority weights is a total of the one or more first PLMN-priority weights, and

wherein the representative donor access priority level based on the assigned one or more second PLMN-priority weights is a total of the one or more second PLMN-priority weights.

3. The method of claim 1, wherein the allocation comprises an allocation to the relay backhaul link of a first portion of the frequency bandwidth and an allocation to the donor access link of a second portion of the frequency bandwidth, wherein the first portion and the second portion are mutually exclusive.

4. The method of claim 3, wherein the frequency bandwidth defines a plurality of frequency bands, wherein the first portion is a first proper subset of the plurality of bands, and the second portion is a second proper subset of the plurality of bands.

5. The method of claim 1, carried out by the donor base station.

6. The method of claim 5, wherein applying the allocation comprises transitioning from use of at least a particular part of the frequency bandwidth on one of the donor access link or the relay backhaul link to use of the particular part of the frequency bandwidth on the other of the donor access link or the relay backhaul link.

7. The method of claim 6, wherein the transitioning comprises directing at least one UE to engage in an inter-frequency handover process.

8. The method of claim 1,

wherein each PLMN is of a type selected from the group consisting of a home PLMN, a mobile virtual network operator (MVNO) PLMN, and a roaming partner PLMN.

9. The method of claim 1, wherein the donor access link, the relay backhaul link, and the relay access link each operate according to an Orthogonal Frequency Division Multiple Access (OFDMA) air interface protocol.

17. The base station of claim 1, wherein the donor access link, the relay backhaul link, and the relay access link each operate according to an Orthogonal Frequency Division Multiple Access (OFDMA) air interface protocol.

10. A base station configured to wirelessly communicate over a donor access link with one or more user equipment devices (UEs) served by the base station and over a relay backhaul link with a relay node served by the base station, wherein the relay node is configured to communicate over a relay access link with one or more UEs served by the relay node,

wherein the base station includes a controller configured to cause the base station to carry out operations comprising:

assigning one or more first public land mobile network (PLMN)-priority weights to the one or more UEs served by the relay node, wherein the one or more first PLMN-priority weights includes, for each of the one or more UEs served by the relay node, a respective first PLMN-priority weight based on a priority level of a PLMN to which the UE subscribes,

assigning one or more second PLMN-priority weights to the one or more UEs served by the donor base station, wherein the one or more second PLMN-priority weights includes, for each of the one or more UEs served by the donor base station, a respective second PLMN-priority weight based on a priority level of a PLMN to which the UE subscribes,

comparing (i) a representative relay priority level based on the assigned one or more first PLMN-priority weights with (ii) a representative donor access priority level based on the assigned one or more second PLMN-priority weights,

establishing an allocation of frequency bandwidth between the relay backhaul link and the donor access link based on the comparing of the representative relay priority level with the representative donor access priority level, and

applying the established allocation.

11. The base station of claim 10,

wherein the representative relay priority level based on the assigned one or more first PLMN-priority weights is a total of the one or more first PLMN-priority weights, and

wherein the representative donor access priority level based on the assigned one or more second PLMN-priority weights is a total of the one or more second PLMN-priority weights.

12. The base station of claim 10, wherein the allocation comprises an allocation to the relay backhaul link of a first portion of the frequency bandwidth and an allocation to the donor access link of a second portion of the frequency bandwidth, wherein the first portion and the second portion are mutually exclusive.

13. The base station of claim 12, wherein the frequency bandwidth defines a plurality of frequency bands, wherein the first portion is a first proper subset of the plurality of bands, and the second portion is a second proper subset of the plurality of bands.

14. The base station of claim 10, wherein applying the allocation comprises transitioning from use of at least a particular part of the frequency bandwidth on one of the donor access link or the relay backhaul link to use of the particular part of the frequency bandwidth on the other of the donor access link or the relay backhaul link.

15. The base station of claim 14, wherein the transitioning comprises directing at least one UE to engage in an inter-frequency handover process.

16. The base station of claim 10,

wherein each PLMN is of a type selected from the group consisting of a home PLMN, a mobile virtual network operator (MVNO) PLMN, and a roaming partner PLMN.

18. A system comprising:

a donor base station; and

a relay node,

wherein the donor base station is configured to serve one or more user equipment devices (UEs) over a donor access link and to serve a relay node over a relay backhaul link,

wherein the relay node is configured to serve one or more UEs over a relay access link, and

wherein the donor base station is further configured to carry out operations comprising;

assigning one or more first public land mobile network (PLMN)-priority weights to the one or more UEs served by the relay node, wherein the one or more first PLMN-priority weights includes, for each of the one or more UEs served by the relay node, a respective first PLMN-priority weight based on a priority level of a PLMN to which the UE subscribes,

assigning one or more second PLMN-priority weights to the one or more UEs served by the donor base station, wherein the one or more second PLMN-priority weights includes, for each of the one or more UEs served by the donor base station a respective second PLMN-priority weight based on a priority level of the PLMN to which the UE subscribes,

comparing (i) a representative relay priority level based on the assigned one or more first PLMN-priority weights with (ii) a representative donor access priority level based on the assigned one or more second PLMN-priority weights,

establishing an allocation of frequency bandwidth between the relay backhaul link and the donor access link based on the comparing of the representative relay priority level with the representative donor access priority level, and

applying the established allocation.

20. The system of claim 18, wherein the allocation comprises an allocation to the relay backhaul link of a first portion of the frequency bandwidth and an allocation to the donor access link of a second portion of the frequency bandwidth, wherein the first portion and the second portion are mutually exclusive.

19. The system of 18,

wherein the representative relay priority level based on the assigned one or more first PLMN-priority weights is a total of the one or more first PLMN-priority weights, and

wherein the representative donor access priority level based on the assigned one or more second PLMN-priority weights is a total of the one or more second PLMN-priority weights.