Connectionless Uplink Transmission via Dedicated Random Access Resources
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink data due to the need for establishing connections, which is time-consuming and power-intensive, especially when small amounts of data are transmitted, and existing methods struggle with decoding signals during collisions or poor channel conditions.
Innovation Solution
A connectionless transmission method where user equipment (UE) transmits uplink data without a prior established connection, using a random access preamble, receiving scheduling information, and transmitting data via a shared resource with a selected reference signal, with a response signal confirming successful transmission and handling collisions or poor channel issues through UE identifier information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connection is established before data transmission, then reliable communication is ensured, but transmission delay and power consumption increase
Solution Approach 1:
The base station performs preliminary actions by allocating dedicated random access resources and pre-configuring reference signals before the UE needs to transmit data. This allows the UE to immediately use these pre-prepared resources for connectionless transmission, eliminating the need for time-consuming connection establishment procedures while maintaining communication reliability through the pre-allocated dedicated resources.
Solution Approach 2:
The invention extracts the essential connection establishment steps from the full connection procedure. By separating the random access preamble transmission and dedicated resource allocation from the complete connection setup, the system enables data transmission to proceed without requiring full connection establishment, thus reducing delay while maintaining reliability through the extracted critical connection elements.
2Reliability
If a connection is established before data transmission, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The base station performs preliminary actions by allocating dedicated random access resources and pre-configuring reference signals before the UE needs to transmit data. This allows the UE to immediately use these pre-prepared resources for connectionless transmission, eliminating the need for time-consuming connection establishment procedures while maintaining communication reliability through the pre-allocated dedicated resources.
Solution Approach 2:
The invention extracts the essential connection establishment steps from the full connection procedure. By separating the random access preamble transmission and dedicated resource allocation from the complete connection setup, the system enables data transmission to proceed without requiring full connection establishment, thus reducing delay while maintaining reliability through the extracted critical connection elements.
3Productivity
If random access preambles are transmitted via the same resource, then resource utilization is improved, but signal collision probability increases
Solution Approach 1:
The invention introduces a new dimension by assigning different reference signals to different UEs transmitting on the same random access resource. Instead of only using time-frequency resources, the system adds the reference signal dimension as an additional identifier. This allows the base station to distinguish between colliding preambles by detecting which reference signal accompanies each preamble, thereby resolving collisions while maintaining high resource utilization.
Solution Approach 2:
The reference signal acts as an intermediary element that mediates between colliding preambles. When multiple UEs transmit random access preambles on the same resource, the reference signals serve as distinctive markers that allow the base station to identify and separate the signals, preventing decoding failures due to collisions while still allowing multiple UEs to use the same time-frequency resource.
4Loss of time
If connectionless transmission is used, then transmission delay is reduced, but decoding reliability under poor channel conditions worsens
Solution Approach 1:
The base station performs preliminary actions by allocating dedicated random access resources and pre-configuring reference signals before the UE needs to transmit data. This allows the UE to immediately use these pre-prepared resources for connectionless transmission, eliminating the need for time-consuming connection establishment procedures while maintaining communication reliability through the pre-allocated dedicated resources.
Solution Approach 2:
The invention extracts the essential connection establishment steps from the full connection procedure. By separating the random access preamble transmission and dedicated resource allocation from the complete connection setup, the system enables data transmission to proceed without requiring full connection establishment, thus reducing delay while maintaining reliability through the extracted critical connection elements.
Data Source
AI summary
Provided are a method and an apparatus for transmitting uplink data in a wireless communication system. Specifically, a first terminal transmits a random access preamble for requesting a connectionless transmission. The first terminal receives a random access response comprising scheduling information of the uplink data. The first terminal transmits the uplink data, a reference signal selected by the terminal and terminal identification information of the terminal from a first overlapping resource utilized by a second terminal. The first terminal receives, as a response for the uplink data, a response signal comprising a terminal identification information field containing terminal identification information corresponding to each reference signal.