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Measurements and fast power adjustments in D2D communications

A technology for device communication and quality of service, applied in wireless communication, power management, electrical components, etc., can solve problems such as power density impact, high delay, and different time delays

Inactive Publication Date: 2015-07-15
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A problem that arises in power control for D2D communication is that different radio resource management RRM functions optimized with accurate power measurements or power control commands have different time delays
The decision made by the cellular network about what specific radio resources to allocate to D2D links has high latency and can be affected by the available power density of those links

Method used

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  • Measurements and fast power adjustments in D2D communications
  • Measurements and fast power adjustments in D2D communications
  • Measurements and fast power adjustments in D2D communications

Examples

Experimental program
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Embodiment Construction

[0022] For easy reference to the more detailed description below, figure 1 A general configuration of a network access point or BS related to UEs participating in D2D communication is shown. The following descriptions are used in figure 1 is shown as an instance of a D2D "pair" of UE1 and UE2. The term "pair" is used for clarity of description, and any D2D "pair" detailed below may include more than any two devices between which they participate in D2D communication. exist figure 1 In the figure, the link between UE1 and BS is shown as 102, and the link between UE2 and BS is shown as 104. Where relevant, the direction of those links 102, 104 is described below as UL or DL. Depending on the direction, the D2D link can be considered as two different links. figure 1 The D2D link from UE1 to UE2 is shown as 106a, hereinafter simply referred to as D2D (1→2). figure 1 The D2D link from UE2 to UE1 is also shown as 106b, hereinafter simply referred to as D2D(2→1). In any given ...

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Abstract

At a cluster head / first device there is received, from each of at least two other devices with which the cluster head has a respective wireless link, a quality indicator for the respective link observed by the respective other device. The cluster head compiles those received quality indicators into a compressed report, and sends the compressed report to a network entity. In a specific embodiment the cluster head also determines an additional quality indicator of each of those respective links observed by the cluster head by listening to a sounding reference signal sent by the respective other device to the network entity on a PUCCH. Those additional quality indicators are also compiled into the compressed report, as are further quality indicators received from the devices for D2D links between pairs of those other devices that exclude the cluster head. The compressed report can inform how many indicators are above / below a threshold.

Description

technical field [0001] The teachings herein generally relate to power considerations associated with wireless device-to-device D2D communications. Background technique [0002] The following abbreviations and terms are defined here: [0003] [0004] Future developments in wireless communication systems tend to integrate network topologies rather than having multiple networks using different protocols overlap each other in the same geographic space. For example, there has been some research in both industry and academia on heterogeneous networks, where these are deployments of macro cells, micro cells, pico cells, and / or femto cells in the same LTE / LTE-A cellular overlay topology Use relay nodes to all utilize the same wireless spectrum. Another area of ​​research in this integration concept is allowing direct communication between user devices when they are in close proximity to each other. This is often referred to as device-to-device D2D communication, and, unlike c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W24/00H04W52/04H04W72/54
CPCH04W52/242H04W52/383H04W52/386H04W52/243H04W52/146H04W24/10
Inventor S-J·阿科拉T·科斯凯拉G·查尔比特V·范
Owner NOKIA TECH OY