Mobile terminal device and associated method for obtaining uplink resources
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Solution Overview
Problem
The increasing number of terminal devices in wireless telecommunications networks leads to potential radio network congestion and interference, particularly during random access procedures, due to the limited number of available RA preambles and interference between PRACH and PUSCH/PUCCH transmissions.
Innovation Solution
A method where a base station allocates uplink resources to one terminal device in response to a random access procedure initiated by another, grouping terminal devices with similar traffic profiles to preemptively allocate resources and prevent unnecessary PRACH transmissions, thereby reducing congestion and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all terminal devices transmit random access preambles independently when needing uplink resources, then each device can obtain resources individually, but radio network congestion and interference increase significantly
Solution Approach 1:
The patent merges multiple terminal devices into groups based on similar traffic profiles and allows them to share random access resources. Instead of each device transmitting independently, grouped devices coordinate their random access transmissions, reducing the total number of preambles transmitted on the radio interface and thereby reducing congestion and interference.
Solution Approach 2:
The base station performs preliminary grouping of terminal devices based on their traffic profiles before random access procedures occur. This pre-organization allows the network to anticipate resource needs and coordinate random access transmissions in advance, preventing the congestion that would arise from independent transmissions.
2Adaptability or versatility
If the number of terminal devices increases to support more users, then network coverage and service availability improve, but the number of available RA preambles becomes insufficient
Solution Approach 1:
The patent combines multiple terminal devices into shared random access groups, allowing them to compete for and share the有限的 RA preamble resources. This merging approach enables the network to support more terminal devices than the number of available preambles would normally allow, as multiple devices can share the same preamble resources through coordinated access.
Solution Approach 2:
The patent makes RA preamble resources serve multiple functions by allowing them to be shared among grouped terminal devices. A single preamble can be used by multiple devices in a group, and the base station can identify and serve multiple devices through the same preamble transmission, thereby increasing the effective capacity of the limited preamble resources.
3Speed
If terminal devices transmit PRACH frequently to request uplink resources, then resource allocation responsiveness improves, but power consumption of terminal devices increases
Solution Approach 1:
The patent merges multiple terminal devices into groups where they share random access resources and coordinate transmissions. This reduces the frequency and number of individual PRACH transmissions needed, as devices can share the access burden with group members, thereby reducing power consumption while maintaining resource allocation responsiveness.
Data Source
AI summary
A method of allocating radio resources for uplink transmissions in a wireless telecommunications system, the method including: a first terminal device communicating a request for an allocation of radio resources to a base station; the base station determining there is an association between the first terminal device and a second terminal device based on their having similar predicted traffic profiles for uplink data; and the base station establishing a radio resource allocation for the second terminal device based on the resources requested by the first terminal device, and consequently transmitting radio resource allocation messages to allocate radio resources to the first and the second terminal devices for respective uplink transmissions based on the request for an allocation of radio resources received from the first terminal device.