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Method and device for precoding control in wireless communication network

A technology of wireless communication network and wireless communication equipment, applied in the field of wireless communication network

Active Publication Date: 2022-05-17
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method and device for precoding control in wireless communication network
  • Method and device for precoding control in wireless communication network
  • Method and device for precoding control in wireless communication network

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Embodiment Construction

[0037] figure 1 A radio network node 10 and a wireless communication device 12 are depicted. The radio network node 10 is associated with a radio access network RAN ​​14 of a wireless communication network 16 . The RAN 14 and the core network CN 18 form a wireless communication network 16, which may include further nodes not explicitly shown in the figure. The network 16 provides communication services to the wireless communication device 12, for example, by operatively connecting the wireless communication device 12 to one or more external networks 20, such as the Internet. In a non-limiting example, network 16 comprises a wide area access network or WAN, such as a cellular network based on 3GPP specifications. Example implementations include LTE-based implementations, as well as 5G implementations involving new radio NR interfaces.

[0038] figure 2 Further example details of the wireless communication device 12 and the radio network node 10 are shown. The wireless com...

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Abstract

The techniques disclosed herein involve network-side and device-side operations that provide for the advantageous use of a reduced precoder set within a larger precoder corpus. The reduced set is dynamically identified based on channel characteristics between the radio network node and the wireless device and use of a defined mapping function that maps a reduced set of precoders within a larger corpus to a reduced set of index values. Reporting precoders from the reduced set provides a significant reduction in signaling overhead due to the smaller size of the index value used to index the reduced set, while providing the ability to select from precoders that match the current channel conditions.

Description

technical field [0001] The present invention relates to wireless communication networks, and in particular to precoding control in wireless communication networks. Background technique [0002] In many wireless communication systems, channel state information (CSI) feedback is crucial to obtain good performance between sending and receiving entities. For example, the sending entity sends a reference signal that provides the receiving entity with a basis for estimating the channel state. The reported CSI feedback from the receiving entity typically includes a channel quality indicator CQI, a rank indicator RI and a precoding matrix indicator PMI. The CQI value is used as a quantified representation of the measured signal quality, the RI value indicates the number of transmission layers that can be supported, and the PMI value indicates the preferred precoder, i.e. a preferred set of antenna weights for performing multi-antenna transmissions to and from the reporting entity ...

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0478H04B7/0639H04B7/0658H04B7/0626H04W72/0446H04B7/0634H04B7/0632H04W72/0466H04W72/541
Inventor J·弗贝里奥尔松K·赫斯勒M·赫斯勒M·契尔基奇
Owner TELEFON AB LM ERICSSON (PUBL)
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