Uplink Resource Request Timing for Communication Systems
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Solution Overview
Problem
In communication systems like E-UTRAN, user equipment faces challenges in efficiently scheduling uplink resources, particularly in active mode, leading to potential delays in data transmission for user equipment with strict timing requirements and inefficient use of communication system resources due to the RACH procedure's limitations.
Innovation Solution
The system and method involve a user equipment determining whether to use a RACH procedure for uplink resource requests based on data priority and availability of persistent allocations, with options to initiate requests immediately or after a delay, and the base station responding with immediate allocation or 'on hold' messages to manage resource allocation effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RACH procedure is used for uplink resource requests in active mode, then user equipment can request resources, but it causes unnecessary signaling overhead and delays for data that does not require immediate transmission
Solution Approach 1:
The patent changes the parameter of resource request timing by introducing two distinct modes: immediate RACH procedure for high-priority data and delayed request until DRX timeout for normal data. This parameter change allows the system to adapt the request timing based on data priority, resolving the contradiction between immediate resource allocation and avoiding unnecessary signaling overhead.
Solution Approach 2:
The patent introduces dynamic behavior by making the resource request timing flexible rather than fixed. The user equipment dynamically selects between immediate RACH procedure and delayed request based on the priority of the data to be transmitted. This dynamic adaptation resolves the contradiction by allowing the system to be responsive when needed while being efficient when not needed.
2Loss of time
If the user equipment immediately requests uplink resources upon data arrival, then transmission delay is reduced, but communication system resources are wasted due to unnecessary RACH procedures
Solution Approach 1:
The patent changes the timing parameter of resource requests based on data priority. For normal-priority data, the request timing is changed from immediate to delayed (until DRX timeout), reducing unnecessary signaling. For high-priority data, immediate requesting is maintained. This selective parameter change resolves the contradiction between reducing transmission delay and minimizing signaling overhead.
Solution Approach 2:
The patent applies partial action by not always executing the RACH procedure immediately. Instead, it selectively applies immediate requesting only when necessary (high-priority data), and delays requesting for normal-priority data. This partial application of the immediate request action resolves the contradiction by avoiding excessive signaling while maintaining responsiveness when needed.
3Loss of energy
If the user equipment waits for DRX timeout before requesting resources, then signaling overhead is reduced, but transmission delay increases for high-priority data
Solution Approach 1:
The patent changes the request timing parameter based on data priority classification. High-priority data triggers immediate RACH procedure to ensure timing requirements are met, while normal-priority data waits for DRX timeout. This conditional parameter change resolves the contradiction by ensuring reliability for time-critical data while minimizing signaling overhead for non-critical data.
Solution Approach 2:
The patent introduces dynamic decision-making where the user equipment dynamically selects the request timing strategy based on data priority. This dynamic adaptation ensures that the system maintains reliability for high-priority data by immediately requesting resources, while reducing signaling overhead for normal-priority data by waiting. The dynamic behavior resolves the contradiction between signaling efficiency and timing compliance.
Data Source
AI summary
An apparatus, method and system for scheduling uplink resources in communication systems. In one embodiment, the apparatus (e.g., user equipment) 300 includes a buffer 340 containing data to be transmitted to an entity (e.g., a base station) 400 of the communication system. The apparatus 300 also includes a processing unit 310 configured to provide a request for the entity 400 for an uplink resource allocation for transmission of the data in the buffer 340 when the data is a first type. The processing unit 310 is also configured to provide a request following a delay period for the entity 400 for an uplink resource allocation for transmission of the data in the buffer 340 when the data is a second type.