Target Cell Uplink Resource Configuration for RACH-Less Handover
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Solution Overview
Problem
In wireless communication systems, when a terminal switches to a new cell without needing a random access channel (RACH) procedure for timing advance (TA), there is a challenge in providing reliable uplink resources for transmission.
Innovation Solution
The terminal receives configuration information to directly use uplink resources of the target cell, enabling direct uplink transmissions without RACH, improving transmission reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal performs uplink transmission without RACH procedure in target cell, then the transmission speed is improved, but the transmission reliability deteriorates
Solution Approach 1:
The network device pre-configures uplink resources and timing advance values for the target cell before the terminal performs uplink transmission. This preliminary configuration enables the terminal to directly transmit uplink data without executing the RACH procedure, thereby achieving both fast transmission speed and reliable communication through pre-established parameters
2Productivity
If the terminal uses pre-configured uplink resources, then the transmission efficiency is improved, but the resource allocation complexity increases
Solution Approach 1:
The network device sends indication information that can simultaneously configure multiple uplink resources and correspond to multiple timing advance values. This universal configuration approach allows the terminal to efficiently select appropriate resources without complex allocation procedures, improving transmission efficiency while keeping the system manageable through standardized indication mechanisms
Data Source
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AI summary
Disclosed in the embodiments of the present disclosure are a method and apparatus for sending data, which can be applied to the technical field of communications. The method executed by a terminal device comprises: receiving first information, wherein the first information is used for configuring uplink resources of a target cell; and performing uplink transmission by means of the uplink resources. Therefore, in a RACH-less cell handover process, the terminal device can directly perform the uplink transmission by means of the uplink resources of the target cell configured by a network device, thereby improving the reliability of the uplink transmission.