A method for controlling uplink transmissions from a user device to an access point in a wireless telecommunications system is described. Each access point defines a communications cell, and the method comprises monitoring interference in an uplink channel at an access point, performing interference
A method for controlling uplink transmissions from a user device to an access point in a wireless telecommunications system is described. Each access point defines a communications cell, and the method comprises monitoring interference in an uplink channel at an access point, performing interference control actions at the access point when monitored interference exceeds a first predetermined level, monitoring occurrences of such control actions at the access point, and if a number of such occurrences exceeds a predetermined level, performing interference control actions with reference to a plurality of cells at a central controller of the telecommunications system, which central controller is operable to control a plurality of access points.
대표청구항▼
1. A method for controlling uplink transmissions from a user device to an access point in a wireless telecommunications system, the access point defining a communications cell, the method comprising: monitoring interference in an uplink channel at an access point,performing interference control acti
1. A method for controlling uplink transmissions from a user device to an access point in a wireless telecommunications system, the access point defining a communications cell, the method comprising: monitoring interference in an uplink channel at an access point,performing interference control actions at the access point when monitored interference exceeds a first predetermined level, wherein the interference control actions performed at the access point include preventing use of a channel, minimising use of a channel, allocating a predetermined minimum bit rate for a channel, and/or scheduling a channel with a predetermined probability,monitoring occurrences of the interference control actions at the access point, andin response to determining that a number of occurrences of the interference control actions performed at the access point exceeds a predetermined level, performing interference control actions with reference to a plurality of cells at a central controller of the telecommunications system, which central controller is operable to control a plurality of access points, wherein the interference control actions performed at the central controller include suspension of a channel or suspension of a selected number of channels. 2. The method of claim 1, wherein at least some control actions are ended when monitored interference in a call falls below a second predetermined level. 3. The method of claim 2, wherein all control actions are ended when monitored interference in a cell falls below the second predetermined level. 4. The method of claim 2, wherein the second predetermined level equals the first predetermined level. 5. An access point for use in a wireless telecommunication system which includes at least one user device operable to transmit data to an access point over an uplink, a plurality of access points defining respective cells, and a central controller operable to control a plurality of access points, the access point comprising: a channel interference control unit operable to:monitor interference in an uplink channel,perform interference control actions for an associated cell when monitored interference in that cell exceeds a predetermined level, wherein the interference control actions at the access point include preventing use of a channel, minimising use of a channel, allocating a predetermined minimum bit rate for a channel, and/or scheduling a channel with a predetermined probability,monitor occurrences of the interference control actions for the associated cell, andin response to determining that a number of occurrences of the interference control actions for the associated cell exceeds a predetermined level, refer control to a central controller which is operable to perform interference control actions with reference to a plurality of cells, wherein the interference control actions include suspension of a channel or suspension of a selected number of channels. 6. The access point of claim 5, operable to end at least some control actions when monitored interference in a cell falls below a second predetermined level. 7. The access point of claim 6, operable to end all control actions when monitored interference in a cell falls below the second predetermined level. 8. The access point of claim 6, wherein the second predetermined level equals the first predetermined level. 9. A controller for controlling a plurality of access points in a wireless telecommunications system which includes at least one user device and a plurality of access points defining respective cells, the controller comprising an interference control unit operable to perform interference control actions with reference to a plurality of cells in response to receipt of an indication from an access point that a number of occurrences of interference control actions performed at the access point exceeds a predetermined level, wherein the interference control actions performed at the access point include preventing use of a channel, minimising use of a channel, allocating a predetermined minimum bit rate for a channel, and/or scheduling a channel with a predetermined probability, and wherein the interference control actions performed with reference to a plurality of cells include suspension of a channel and suspension of a selected number of channels. 10. The controller of claim 9, wherein at least some control actions are ended when monitored interference in a cell falls below a second predetermined level. 11. The controller of claim 10, wherein all control actions are ended when monitored interference in a cell falls below the second predetermined level. 12. The controller of claim 10, wherein the second predetermined level equals the first predetermined level. 13. A wireless telecommunications system comprising: at least one user device;a plurality of access points defining respective cells;a user device being operable to transmit data to an access point on an uplink defined by that access point; anda central controller operable to control the plurality of access points, wherein at least one access point is operable to: monitor interference in an uplink channel,perform interference control actions for an associated cell when monitored interference in that cell exceeds a predetermined level,monitor occurrences of the interference control actions for the associated cell, andin response to determining that a number of occurrences of the interference control actions performed for the associated cell exceeds a predetermined level, to refer control to the central controller, the central controller being operable to perform interference control actions with reference to a plurality of cells, wherein the interference control actions performed at the central controller include suspension of a channel or suspension of a selected number of channels. 14. The system of claim 13, operable to end at least some control actions when monitored interference in a cell falls below a second predetermined level. 15. The system of claim 14, operable to end all control actions when monitored interference in a cell falls below the second predetermined level. 16. The system of claim 14, wherein the second predetermined level equals the first predetermined level.
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이 특허에 인용된 특허 (2)
Miyamoto, Yukie, CDMA mobile communications system.
Ishikawa,Yoshihiro; Onoe,Seizo; Sato,Takaaki; Hiramoto,Yoshitaka; Nakamura,Takehiro, Communications system employing a scheme of radio channel setting control.
Hakola, Sami-Jukka; Turtinen, Samuli; Koskela, Timo; Phan, Vinh Van, Dynamic autonomous resource allocation and channel access in cellular System Uplink.
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