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mmw physical layer downlink channel scheduling and control signaling

A technology of physical downlink and control signaling, which is used in wireless communication, network topology, electrical components, etc.

Active Publication Date: 2020-06-26
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the narrow beam pattern of mmW beams can pose a challenge to individual mmW base station solutions, for example, in the delivery of cell-specific and / or broadcast information

Method used

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  • mmw physical layer downlink channel scheduling and control signaling
  • mmw physical layer downlink channel scheduling and control signaling
  • mmw physical layer downlink channel scheduling and control signaling

Examples

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example 28

[0095] Since the mmW downlink data link target is as high as 30km / h, the maximum Doppler shift at 28GHz can be 778Hz. The channel time dispersion on mmW frequency can be measured, and the example 28 GHz measurement in dense urban areas indicates that the example root mean square (RMS) delay spread σ can be between 100 and 200 ns. The 90% coherence bandwidth can be estimated at 1 / 50σ100kHz and the 50% coherence bandwidth can be estimated at 1 / 5σ1kHz. The subcarrier spacing between 100kHz and 1kHz may be reasonable. An example Δf may be 300 kHz, for example, K=20. The wide subcarrier spacing can be robust to Doppler shifts and other types of frequency errors, which can reduce the difficulty of implementation.

[0096] OFDM system symbol length T symbol It can be 1 / Δf. If the subcarrier spacing Δf is 300kHz, the symbol length T symbol It can be 3.33μs. The cyclic parameter (CP) length can cover the entire length of the channel time dispersion to eliminate inter-symbol interfer...

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Abstract

A wireless transmit / receive unit (WTRU), such as a millimeter wave WTRU (mWTRU), may receive a first control channel using a first antenna pattern. The WTRU may receive the second control channel using the second antenna pattern. The WTRU may demodulate and decode the first control channel. The WTRU may demodulate and decode the second control channel. The WTRU may determine beam scheduling information associated with the WTRU and determine whether the WTRU is scheduled for the mmW partition using at least one of: a decoded first control channel or a second control channel. The WTRU may use the determined beam scheduling information to form receive beams. The WTRU receives the second control channel using the receive beam. The WTRU determines dynamic per-TTI scheduling information related to data channels associated with the second control channel by demodulating and decoding the second control channel.

Description

[0001] Cross references to related applications [0002] This application claims the rights and interests of U.S. Provisional Patent Application No. 61 / 977,613 filed on April 9, 2014, the entire content of which is incorporated herein by reference. Background technique [0003] For the past few decades, the number of mobile devices has grown exponentially, which has caused an increase in demand for data and the data delivery capabilities of mobile wireless networks. In order to meet the rapidly increasing demand for mobile data, a large number of smaller cells can be deployed. However, the bandwidth provided by heterogeneous networks including macro and small cell networks may not be sufficient. Therefore, other mechanisms, such as the use of millimeter wave (mmW) frequencies, can be used to provide significant capacity improvements related to user-specific data transmission. However, the narrow beam pattern of mmW beams can pose a challenge to individual mmW base station solutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04W72/046H04W72/23H04W84/045
Inventor T·邓Y·迪诺P·J·彼得拉什基R·V·普拉加达
Owner INTERDIGITAL PATENT HLDG INC