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, determining associations based on similar traffic profiles and preventing other terminal devices within the same profile group from initiating random access requests, thereby reducing the number of PRACH transmissions and allocating resources preemptively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices initiate random access procedures independently, then each device can obtain uplink resources, but radio network congestion and interference increase due to limited RA preambles
Solution Approach 1:
The base station performs preliminary grouping of terminal devices based on traffic profiles before random access occurs. By pre-identifying which devices have similar traffic patterns and likely need uplink resources simultaneously, the base station can proactively allocate resources to the group representative, preventing multiple devices from independently initiating random access procedures and causing congestion.
Solution Approach 2:
The base station acts as an intermediary by introducing a group representative mechanism. Instead of allowing multiple terminal devices to directly compete for limited RA preambles, the base station selects one representative per group to initiate random access on behalf of the entire group. This intermediary approach filters out redundant access attempts and reduces interference.
2Productivity
If multiple terminal devices transmit PRACH simultaneously, then each can request resources, but interference between PRACH and PUSCH/PUCCH transmissions increases
Solution Approach 1:
The patent merges multiple terminal devices into traffic profile groups, where devices with similar uplink traffic patterns are combined into single representative units for random access purposes. This consolidation reduces the number of simultaneous PRACH transmissions from multiple devices to just one per group, thereby reducing interference with PUSCH and PUCCH while maintaining efficient resource request handling.
Solution Approach 2:
The base station performs preliminary identification and grouping of terminal devices based on their traffic profiles before the random access procedure. By pre-determining which devices belong to the same traffic profile group and selecting a representative, the system avoids simultaneous PRACH transmissions that would cause interference, while still ensuring all group members can efficiently obtain uplink resources when needed.
3Adaptability or versatility
If terminal devices with similar traffic profiles independently access the network, then resource allocation can be customized, but the number of resource requests and PRACH transmissions increases
Solution Approach 1:
The base station performs preliminary classification of terminal devices into traffic profile groups based on their uplink traffic characteristics. This pre-grouping allows the system to maintain adaptability by preserving traffic profile information for customized resource allocation, while simultaneously reducing the quantity of PRACH transmissions by selecting only one representative per group to initiate random access on behalf of all group members.
Solution Approach 2:
Instead of allowing each terminal device to independently initiate random access and then allocating resources based on traffic profiles, the patent inverts the approach by first grouping devices by traffic profile and then having the group representative initiate access. This inversion maintains the adaptability of traffic-profile-based allocation while dramatically reducing the number of PRACH transmissions required.
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.