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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: 2017-05-31
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 targets up to 30km / h, the maximum Doppler shift at 28GHz can be 778Hz. Channel time dispersion at mmW frequencies can be measured, and example 28 GHz measurements in dense urban areas indicate that an example root mean square (RMS) delay spread σ can be between 100 and 200 ns. The 90% coherence bandwidth can be estimated at 1 / 50σ 100 kHz and the 50% coherence bandwidth at 1 / 5σ 1 kHz. Subcarrier spacing between 100kHz and 1kHz may be reasonable. An example Δf may be 300 kHz, eg K=20. Wide subcarrier spacing can be robust to Doppler shift as well as other types of frequency errors, which can reduce implementation difficulty.

[0096] The symbol length T of the OFDM system 符号 Can be 1 / Δf. If the subcarrier spacing Δf is 300kHz, the symbol length T 符号 Can be 3.33μs. The cycle parameter (CP) length can cover the entire length of the channel time dispersion to eliminate inter-symbol interference, but the CP can carry the penalty of extra...

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Abstract

A wireless transmit / receive unit (WTRU) (e.g., a millimeter WTRU (mWTRU)) may receive a first control channel using a first antenna pattern. The WTRU may receive a second control channel using a 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, using at least one of: the decoded first control channel or the second control channel, beam scheduling information associated with the WTRU and whether the WTRU is scheduled for an mmW segment. The WTRU may form a receive beam using the determined beam scheduling information. The WTRU receive the second control channel using the receive beam. The WTRU determine, by demodulating and decoding the second control channel, dynamic per- TTI scheduling information related to a data channel associated with the second control channel.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 61 / 977,613, filed April 9, 2014, which is hereby incorporated by reference in its entirety. Background technique [0003] For the past few decades, the number of mobile devices has grown exponentially, thereby creating an increased demand for data and the data delivery capabilities of mobile wireless networks. To meet the rapidly growing 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 gains related to user-specific data transmission. However, the narrow beam pattern of the mmW beams may pose challenges to the scheme of a separate mmW base station, for example, in delivering c...

Claims

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Application Information

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Patent Type & Authority Applications(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