Uplink Multi-Antenna Control via Scrambled CRC Parity
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Solution Overview
Problem
Current wireless communication systems face challenges in transmitting control information for uplink multi-antenna transmission, as existing methods are not adequately defined for supporting this functionality, particularly in terms of antenna-to-power amplifier mapping, resource allocation schemes, and sounding reference signal transmission.
Innovation Solution
The method involves attaching a cyclic redundancy check (CRC) parity bit to a physical downlink control channel (PDCCH) payload sequence, scrambling it to indicate control information for uplink multi-antenna transmission, and transmitting this sequence, allowing for the acquisition of scheduling and control information for uplink multi-antenna transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control information for uplink multi-antenna transmission is newly defined, then uplink multi-antenna transmission can be supported, but control signal overhead increases
Solution Approach 1:
The patent applies universality by enabling the CRC parity bit to serve multiple functions: traditional error detection and new control information carrying for uplink multi-antenna transmission. This allows a single control channel to support both legacy single-antenna and new multi-antenna transmission modes without requiring separate dedicated control channels, thereby avoiding control signal overhead increase while maintaining system versatility.
Solution Approach 2:
The patent changes the parameter usage of the CRC parity bit from a fixed error detection function to a flexible function that can carry control information. By changing the interpretation and usage parameters of the CRC bit, the system can adapt to multi-antenna transmission requirements without adding new control channels, thus resolving the contradiction between support capability and overhead.
2Quantity of substance
If existing control information is applied to uplink multi-antenna transmission, then control signal overhead is reduced, but transmission reliability deteriorates due to inadequate definition
Solution Approach 1:
The patent introduces an intermediary mechanism using the CRC parity bit as a mediator to carry control information for uplink multi-antenna transmission. This intermediary approach allows the system to maintain reliable transmission by properly defining and interpreting control parameters while avoiding the need for separate control channels, thus achieving both reliability and overhead efficiency.
3Ease of manufacture
If control information for uplink multi-antenna transmission is added to existing control channels, then existing infrastructure is maintained, but control channel capacity is exceeded
Solution Approach 1:
The patent applies dimensionality change by utilizing the time-domain aspect of the CRC parity bit (which was previously only used for error detection) to carry additional control information. This dimensional expansion allows the control channel to accommodate multi-antenna transmission requirements without increasing the spatial or structural complexity of the control channel itself, maintaining infrastructure compatibility while expanding capacity.
Data Source
AI summary
The present description relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving control information for uplink multi-antenna transmission. A method for transmitting control information for uplink multi-antenna transmission according to one embodiment of the present invention comprises the following steps: attaching a CRC parity bit to a PDCCH payload sequence containing uplink transmission resource allocation information; scrambling the CRC parity bit attached to the payload sequence to a bit sequence which indicates control information for uplink multi-antenna transmission; and transmitting the entirety of the sequence to which the scrambled CRC parity bit is attached to the payload sequence.