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Apparatus and method for interference avoidance in mixed device-to-device and cellular environment

A cellular and device technology, applied in the field of interference avoidance devices, can solve problems such as reducing resource utilization efficiency

Active Publication Date: 2012-02-29
NOKIA TECHNOLOGLES OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A potential disadvantage is reduced resource utilization efficiency

Method used

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  • Apparatus and method for interference avoidance in mixed device-to-device and cellular environment
  • Apparatus and method for interference avoidance in mixed device-to-device and cellular environment
  • Apparatus and method for interference avoidance in mixed device-to-device and cellular environment

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Embodiment Construction

[0015] In addition to traditional cellular mode, UEs can also be allowed to operate in D2D mode and can share the same resources as cellular UEs. Additionally, systems such as 3G base stations or similar devices (eg, Node Bs and eNode Bs) can allocate resources to cellular UEs in a dynamic manner. This means that resource allocation may not be accurately predicted based on accumulated knowledge. Therefore, blind interference avoidance methods may not work without any knowledge about any neighboring cell resource allocations. Selecting appropriate resources for D2D UEs to avoid or minimize interference from cellular UEs is directly related to D2D UE performance.

[0016] illustrated with reference to the attached Figure 1 to Figure 6 To best understand example embodiments of the present invention and its potential advantages, like numerals are used for like and corresponding parts in the various drawings.

[0017] figure 1 An example wireless system 100 is shown. Wireless...

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Abstract

In accordance with an example embodiment of the present invention, a method is disclosed that comprises collecting a set of neighbor cellular user equipment (UE) interferences from at least one neighbor cellular UE at a device-to-device (D2D) UE at least in part based on a decoded first uplink radio resource management (RRM) message and computing a first set of average neighbor UE interferences based on the set of collected neighbor cellular UE interferences. The method also comprises predicting at least one interference scenario at least in part based on the first set of average neighbor cellular UE interferences and a decoded second uplink RRM message. The method also comprises selecting a resource for data transmission to a pairing D2D UE at least in part based on the first set of average neighbor cellular UE interferences, and transmitting data over the selected resource to the pairing D2D UE.

Description

technical field [0001] The present invention generally relates to apparatus and methods for interference avoidance in device-to-device (D2D) and cellular hybrid environments. Background technique [0002] In a cellular network model, data traffic typically passes through a centralized controller, such as a base station (BS), even if the communicating parties are in close proximity to each other. Current cellular networks operate in this centralized mode, also referred to as cellular mode in this disclosure. A major benefit of this centralized operation is ease of resource control and interference control. One potential disadvantage is reduced resource utilization efficiency. Twice as many resources may be required for the user equipment (UE) in cellular mode. For example, a cellular UE may need to have a first radio resource allocated between the cellular UE and a base station, and a second radio resource allocated between the base station and another cell UE. In contras...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W72/04H04W76/02H04W4/10H04W72/541
CPCH04W24/00H04W72/02H04W84/042H04W92/18H04W99/00H04W72/541
Inventor 彭涛卢前溪汪海明徐少毅
Owner NOKIA TECHNOLOGLES OY
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