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Reception of Downlink Data for Coordinated Multi-Point Transmission in the Event of Fall-Back

a multi-point transmission and data reception technology, applied in the field of reception of downlink data for coordinated multi-point transmission in the event of fallback, can solve problems such as generating inter-cell interference to other cells or base stations

Pending Publication Date: 2014-03-06
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text is about a technology called DL CoMP, which allows for dynamic switching of transmission points for downlink data. The technical effect of this technology is improved data transmission efficiency and reliability across different cells.

Problems solved by technology

In the uplink, the UE's transmissions to its serving cell generate inter-cell interference to other cells or base stations.

Method used

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  • Reception of Downlink Data for Coordinated Multi-Point Transmission in the Event of Fall-Back
  • Reception of Downlink Data for Coordinated Multi-Point Transmission in the Event of Fall-Back
  • Reception of Downlink Data for Coordinated Multi-Point Transmission in the Event of Fall-Back

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Embodiment Construction

[0013]The invention now will be described more fully hereinafter with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. One skilled in the art may be able to use the various embodiments of the invention.

[0014]Coordinated Multi-Point Transmission (CoMP) is used to send and receive data to and from a UE and multiple transmission points. The transmission points may include, for example, an eNodeB configured as a cell, macro cell, pico cell, femto cell, remote radio head, distributed antennas, other wireless transmission entity, or a combination thereof. The transmission points coordinate with each other to jointly optimize the downlink beamforming signals, including the beamforming vector...

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Abstract

Systems and methods for fall-back rate-matching and timing for user equipment (UE) configured for downlink (DL) Coordinated Multi-Point Transmission (CoMP) are disclosed. In one embodiment, when a UE configured in DL CoMP receives a fall-back transmission, PDSCH is rate-matched around the serving cell CRS. In an alternative embodiment, when a UE configured in DL CoMP receives a fall-back transmission, PDSCH is rate-matched or uses timing around one of the cell-specific reference symbol (CRS) resource element (RE) set indicated by RRC-higher layer signaling. For example, PDSCH may be rate-matched or use timing around the first RRC higher layer configured CRS RE set.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of the filing date of U.S. provisional patent application No. 61 / 693,854, filed Aug. 28, 2012, the disclosure of which is hereby incorporated herein by reference in its entirety.BACKGROUND[0002]A LTE wireless network consists of multiple base stations. Each base station, such as an Evolved Node B (eNodeB or eNB), may be configured as a single cell with its own cell ID and assigned to cover a specific serving area. In a conventional wireless network, mobile terminals or User Equipment (UE) are always connected to and receive uplink (UL) and downlink (DL) data from one connected cell, with single-cell transmission / reception. In the downlink, transmissions from other base stations generate inter-cell interference to the UE. In the uplink, the UE's transmissions to its serving cell generate inter-cell interference to other cells or base stations.SUMMARY OF THE INVENTION[0003]For DL Coordinated Multi-...

Claims

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Application Information

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IPC IPC(8): H04W72/08
CPCH04W72/085H04L1/0046H04W28/22H04W76/27H04W72/23H04W72/54H04W72/542H04B7/024
Inventor CHEN, RUNHUA
Owner TEXAS INSTR INC