Sidelink Resource Pool Timing for Multi-Slot PSCCH/PSSCH
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Solution Overview
Problem
The existing method of indicating time-domain resources using a bitmap at the granularity of a single slot is not applicable to sidelink transmission at the granularity of consecutive multiple slots, leading to inefficiencies in sidelink communication systems, particularly in high-frequency bands where symbol durations are too short for adequate AGC and RX/TX switching.
Innovation Solution
A first time unit is introduced, comprising M1 consecutive slots, where M1 is a positive integer greater than 1, to indicate time-domain resources for PSCCH and/or PSSCH transmission, allowing for AGC and GP symbols to be allocated within this unit, thereby improving transmission efficiency in high-frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bitmap is used to indicate time-domain resources at the granularity of a single slot, then the resource indication is simple and straightforward, but it is not applicable to sidelink transmission at the granularity of consecutive multiple slots, leading to transmission inefficiency
Solution Approach 1:
The patent divides the time-domain resource indication into two levels: a first bitmap at the slot level and a second bitmap at the symbol level within each slot. This segmentation allows the system to maintain compatibility with existing single-slot indication methods while adding support for multi-slot transmissions by coordinating multiple slot-level indications with detailed symbol-level configurations within each slot.
2Speed
If symbol duration is shortened in high-frequency bands, then the transmission speed increases, but there is insufficient time for AGC and RX/TX switching
Solution Approach 1:
The patent introduces guard periods (GP) and advance guard periods (AGP) that are pre-allocated within the time-domain resource structure. These guard periods are positioned strategically before and between transmission slots to provide sufficient time for AGC adjustment and RX/TX switching operations to complete before the actual data transmission begins, ensuring that the shortened symbol durations in high-frequency bands do not compromise the necessary switching time.
3Productivity
If guard period overhead is reduced, then transmission efficiency improves, but there is insufficient time for RX/TX switching in high-frequency bands
Solution Approach 1:
The patent applies different time-domain structures to different parts of the transmission frame. Guard periods are locally optimized in specific positions where switching is required, while other time resources are maximized for data transmission. The guard period length and positioning are locally adapted based on the specific transmission scenario, allowing efficient use of resources while ensuring adequate switching time where needed.
Data Source
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AI summary
Provided herein are a method for sidelink transmission and a terminal device. The method includes the following. A first terminal device determines first information; the first information is used to indicate a time-domain resource belonging to a resource pool within an SFN duration. The resource pool is used for transmission of a PSCCH and/or a PSSCH based on a first time unit, the first time unit comprising M1 consecutive slots, and M1 being a positive integer greater than 1. In embodiments of the disclosure, for a resource pool used for transmission of PSCCH and/or PSSCH based on a first time unit, the time-domain resources belonging to a resource pool within an SFN duration can be indicated through first information. The method for resource indication helps to improve the matching degree with transmission schemes that transmit PSCCH and/or PSSCH at the granularity of the first time unit.