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Method for handover of communication link using primary beam

A communication link and main beam technology, applied in wireless communication, electrical components, radio transmission systems, etc., can solve problems such as insufficient use and no use

Inactive Publication Date: 2015-11-11
IDAC HLDG INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these procedures are insufficient for the more challenging wireless transmit / receive unit (WTRU) mobility scenarios in outdoor applications
Furthermore, these procedures do not take advantage of measurements from neighboring cells to help the WTRU track

Method used

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  • Method for handover of communication link using primary beam
  • Method for handover of communication link using primary beam
  • Method for handover of communication link using primary beam

Examples

Experimental program
Comparison scheme
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Embodiment

[0150] 1. A method for millimeter wave beam tracking, comprising:

[0151] Use beam prediction techniques to predict the location of the Wireless Transmit / Receive Unit (WTRU) relative to the mmWave base station (mB).

[0152] 2. The method according to embodiment 1, further comprising:

[0153] Changing the beam direction between the WTRU and the mB based on the WTRU's predicted location.

[0154] 3. The method of embodiment 1, wherein the beam prediction technique uses a positioning technique that predicts the location of a wireless transmit / receive unit (WTRU).

[0155] 4. The method according to any one of the preceding embodiments, wherein the positioning technique uses time stamps.

[0156] 5. The method according to any one of the preceding embodiments, wherein the positioning technique uses location information.

[0157] 6. The method according to any one of the preceding embodiments, wherein the positioning technique uses signal strength measurements.

[0158] 7. T...

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Abstract

A method and apparatus for improving and performing mmW beam tracking is disclosed. Localization methods to improve prediction of the position of a WTRU are described, which may allow a millimeter wave base station (mB) to appropriately select a modified beam and to perform more efficient handover. WTRUs may report directional signal strength measurements to mBs, which may then be used to generate a directional radio environment map (DREM) for use in identifying secondary links to use when a primary link fails. Additional localization techniques using internal / external information for prediction are described. Historical data use and the use of data obtained from mB-mB cooperation including feedback information and reference signaling information are also described. Methods for beam tracking for directional relays and initial beam training optimization are described as well. Finally, WTRU localization precision improvement, beamwidth adaptation, and assisted beam tracking and handover methods are also described.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 694,162, filed August 28, 2012, and US Provisional Application Serial No. 61 / 774,979, filed March 8, 2013, the contents of which are hereby incorporated by reference. Background technique [0003] High frequencies allow for wide bandwidths. The narrow beamforming enabled at these frequencies (accompanied by high penetration loss) provides high spatial capacity for transmitted signals. These frequencies may be referred to as millimeter wave (mmW) frequencies. The precise frequency range can extend from about 28GHz to 160GHz or 300GHz, with special interest in the unlicensed V-band (60GHz band) and E-band (70 / 80 / 90GHz point-to-point bands). Even higher frequencies (sometimes referred to as terahertz (THz)) can be used or applied. V-band is of particular interest because of the availability of unlicensed spectrum at ~7 GHz (depending on the c...

Claims

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Application Information

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IPC IPC(8): H04W36/00H04W16/28H04W36/30
CPCH04W72/085H04W16/28H04W36/0083H04W36/0094H04W36/30H04W64/00H04W72/048H04W88/08H04B7/0695H04B7/088H04W36/00837H04W36/304H04W72/51H04W72/542H04W24/08H04W64/003
Inventor A·罗伊R·V·普拉加达P·J·彼得拉什基B·维斯瓦纳坦
Owner IDAC HLDG INC
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