Method to improve the performance in cell range expansion using location based codebook subset restriction
First Claim
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1. A method of operation of a network node in a cellular communications network, comprising:
- determining a codebook subset restriction for a wireless device based on a location of the wireless device within a serving cell of the wireless device, wherein determining the codebook subset restriction for the wireless device based on the location of the wireless device within the serving cell of the wireless device comprises;
determining whether the wireless device is a cell edge wireless device based on the location of the wireless device within the serving cell of the wireless device; and
if the wireless device is a cell edge wireless device, selecting the codebook subset restriction such that the codebook subset restriction is a predetermined codebook subset restriction that mitigates co-channel interference to other wireless devices; and
sending an indication of the codebook subset restriction to the wireless device;
wherein the codebook subset restriction is dynamic.
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Abstract
Systems and methods are disclosed for providing location-based codebook subset restriction. In some embodiments, location-based codebook subset restriction is provided in such a manner as to mitigate co-channel interference from a macro base station to User Equipment devices (UEs) in a cell range expansion zone of a Low Power Node (LPN) within a coverage area of the macro base station. In this manner, performance of the UEs in the cell range expansion zone is improved.
12 Citations
18 Claims
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1. A method of operation of a network node in a cellular communications network, comprising:
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determining a codebook subset restriction for a wireless device based on a location of the wireless device within a serving cell of the wireless device, wherein determining the codebook subset restriction for the wireless device based on the location of the wireless device within the serving cell of the wireless device comprises; determining whether the wireless device is a cell edge wireless device based on the location of the wireless device within the serving cell of the wireless device; and if the wireless device is a cell edge wireless device, selecting the codebook subset restriction such that the codebook subset restriction is a predetermined codebook subset restriction that mitigates co-channel interference to other wireless devices; and sending an indication of the codebook subset restriction to the wireless device; wherein the codebook subset restriction is dynamic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A network node for operation in a cellular communications network, comprising:
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one or more processors; and memory containing instructions executable by the one or more processors whereby the network node is operative to; determine a codebook subset restriction for a wireless device based on a location of the wireless device within a serving cell of the wireless device, wherein, in order to determine the codebook subset restriction for the wireless device based on the location of the wireless device within the serving cell of the wireless device, the network node is operative to; determine whether the wireless device is a cell edge wireless device based on the location of the wireless device within the serving cell of the wireless device; and if the wireless device is a cell edge wireless device, select the codebook subset restriction such that the codebook subset restriction is a predetermined codebook subset restriction that mitigates co-channel interference to other wireless devices; and send an indication of the codebook subset restriction to the wireless device; wherein the codebook subset restriction is dynamic. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification