Method and system for subcarrier allocation in relay enhanced cellular systems with resource reuse
First Claim
1. A method of allocating subcarrier frequency resource for a relay enhanced cellular communication system including a base station, one or more mobile stations and one or more relay stations, comprising:
- assigning a set of subcarriers by;
allocating subcarriers to one or more relay communication links between the base station and relay stations, to accommodate minimum data rate requirements of one or more access communication links between relay stations and mobile stations;
allocating subcarriers to the one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links, wherein allocating subcarriers to one or more access communication links includes reusing subcarriers among access communication links in different relay cells and assigning the set of subcarriers to one or more access communication links by;
detecting a serving station, among all under-assigned serving stations, with a least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station; and
for a subcarrier allocated to an under-assigned relay station, selectively allocating that subcarrier to other under-assigned relay stations when such allocation benefits overall system throughput.
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Accused Products
Abstract
A method and system for assigning subcarrier frequency resource for a relay enhanced cellular communication system including a base station, one or more mobile stations and one or more relay stations, is provided. Subcarrier assignment involves allocating subcarriers to one or more relay communication links between the base station and relay stations, to accommodate minimum data rate requirements of the access communication links; and allocating subcarriers to one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links, wherein allocating subcarriers to one or more access communication links includes reusing subcarriers among access communication links in different relay cells.
47 Citations
24 Claims
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1. A method of allocating subcarrier frequency resource for a relay enhanced cellular communication system including a base station, one or more mobile stations and one or more relay stations, comprising:
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assigning a set of subcarriers by; allocating subcarriers to one or more relay communication links between the base station and relay stations, to accommodate minimum data rate requirements of one or more access communication links between relay stations and mobile stations; allocating subcarriers to the one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links, wherein allocating subcarriers to one or more access communication links includes reusing subcarriers among access communication links in different relay cells and assigning the set of subcarriers to one or more access communication links by; detecting a serving station, among all under-assigned serving stations, with a least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station; and for a subcarrier allocated to an under-assigned relay station, selectively allocating that subcarrier to other under-assigned relay stations when such allocation benefits overall system throughput. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for allocating subcarrier frequency resource for a relay enhanced cellular communication system including a base station, one or more mobile stations and one or more relay stations, comprising:
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a hardware processor coupled with; an optimization module configured for assigning a set of subcarriers by; allocating subcarriers to one or more relay communication links between the base station and relay stations, to accommodate minimum data rate requirements of one or more access communication links between relay stations and mobile stations; and allocating subcarriers to the one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links, wherein allocating subcarriers to one or more access communication links includes reusing subcarriers among access communication links in different relay cells; wherein the optimization module includes a balancing module configured such that if a subcarrier is allocated to an under-assigned relay station, the subcarrier can also be allocated to other under-assigned relay stations if the allocations can benefit overall system throughput; and wherein the optimization module includes an analysis module configured for detecting a serving station, among all under-assigned serving stations, with a least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A relay enhanced cellular communication system, comprising:
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a base station, one or more mobile stations and one or more relay stations; a controller configured for allocating subcarrier frequency resources, the controller comprising an optimization module configured for assigning a set of subcarriers by; allocating subcarriers to one or more relay communication links between the base station and relay stations, to meet minimum data rate requirements of one or more access communication links between relay stations and mobile stations; allocating subcarriers to the one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links, wherein allocating subcarriers to one or more access communication links includes reusing subcarriers among access communication links in different relay cells; and wherein the optimization module includes a balancing module configured such that if a subcarrier is allocated to an under-assigned relay station, the subcarrier can also be allocated to other under-assigned relay stations if the allocations can benefit overall system throughput, and wherein the optimization module includes an analysis module configured for detecting a serving station, among all under-assigned serving stations, with a least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A controller, comprising:
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a hardware processor coupled with an optimization module configured for assigning a set of subcarriers by; allocating subcarriers to one or more relay communication links between a base station and relay stations, to meet minimum data rate requirements of one or more access communication links between relay stations and mobile stations; and allocating subcarriers to the one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links; and a balancing module configured such that if a subcarrier is allocated to an under-assigned relay station, the subcarrier can also be allocated to other under-assigned relay stations if the allocations can benefit overall system throughput; wherein the optimization module includes an analysis module configured for detecting a serving station, among all under-assigned serving stations, with a least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station. - View Dependent Claims (22)
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23. An apparatus for allocating subcarrier frequency resource for a relay enhanced cellular communication system, comprising:
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a hardware processor coupled with an optimization module configured for assigning a set of subcarriers based on; allocating subcarriers to one or more relay communication links between the base station and relay stations, for accommodating minimum data rate requirements of one or more access communication links between relay stations and mobile stations; and allocating subcarriers to the one or more access communication links between relay stations and mobile stations to approximate the data rates achieved on the corresponding relay communication links; and an analysis module configured for detecting a serving station, among all under-assigned serving stations, with the least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station, such that if the detected station is a base station, then a balancing module allocates a subcarrier to the base station; wherein the optimization module includes an analysis module configured for detecting a serving station, among all under-assigned serving stations, with a least achievement-requirement data rate ratio on its access communication links, wherein a serving station is one of a base station or a relay station. - View Dependent Claims (24)
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Specification