Method and apparatus for improving control channel structure in shortened transmission time intervals
A technology of transmission time interval and control channel, which is applied in the direction of transmission path sub-channel allocation, transmission system, digital transmission system, etc., and can solve problems such as shortening TTI
Active Publication Date: 2017-11-21
ASUSTEK COMPUTER INC
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[0004] Therefore, TTI shortening and processing time reduction can be considered as a solution to help reduce packet data delay, when shortening the time unit of transmission, such as 1 millisecond (ms) (for example, about 14 OFDM symbols), can also reduce Delay due to decoding, however, shortening the length of the TTI may also have a significant impact on current system designs, since the physical channel is developed based on a 1 ms subframe structure, furthermore, due to PDCCH contention and / or sTTI asymmetry, shortening The length of the TTI may also have a significant impact on the scheduling and transmission of the Physical Downlink Shared Channel (PDSCH) and Physical Uplink Shared Channel (PUSCH) with such an sTTI
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[0025] The deficiencies of known control channel structures and / or transmission time intervals in wireless communication systems provide an opportunity to improve the reduction of packet data delay, which will improve the performance of the wireless communication system.
[0026] For example, the Long Term Evolution (LTE) wireless communication system uses a Transmission Time Interval (TTI) of about 1 millisecond (ms) or about 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols. In addition, LTE uses two types of Control channels, the first type of control channel is the Physical Downlink Control Channel (PDCCH), which is a wide band signal that spans the entire system bandwidth and occupies the first few (e.g. about 1-4) of a typical 1ms subframe OFDM symbols, the area occupied by the PDCCH is usually called the control area, and the rest of the subframe is usually called the data area. The second type of control channel is the enhanced physical downlink control chann...
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Disclosed are a method and apparatus for improving a control channel structure in shortened transmission time intervals. The application provides a method and apparatus for improving a control channel structure in shortened transmission time intervals in a wireless communication system. The method includes: establishing a connection of a user equipment device to a base station having a first transmission time interval, wherein the user equipment device is configured to use a short transmission time interval and has a second transmission time interval different from the first transmission time interval, and monitoring a first short physical downlink control channel region for scheduled downlink transmissions via a second transmission time interval, wherein at least a part of control format indicator indicated by a first transmission time interval determines time distribution related to multiple second transmission time intervals in a first transmission time interval.
Description
technical field [0001] The present application relates to a wireless communication network, in particular to a method and device for improving a control channel structure in a short transmission time interval in a wireless communication system. Background technique [0002] With the increase of the maximum data rate of the wireless communication system, packet data delay becomes one of the important measurement criteria for wireless communication network performance evaluation, therefore, reducing the packet data delay can improve the performance of the wireless communication system, and continuous efforts are made to improve the wireless communication system packet data delay. [0003] In the past, the Long Term Evolution (LTE) wireless communication system used a transmission time interval (Transmission Time) of about 1 millisecond (ms) or about 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols. Interval, TTI), in addition, LTE uses two types of control channel...
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Login to View More IPC IPC(8): H04W72/04H04W74/00H04B7/0413
CPCH04B7/0413H04W72/0446H04W74/006H04L1/1854H04L1/1887H04W76/10H04L1/1812H04L5/0053H04W72/12H04W72/23H04L1/1861H04W24/08H04W72/1268
Inventor 李名哲林克疆曾立至
Owner ASUSTEK COMPUTER INC