Communication Terminal Priority Control for Uplink Transmission Delays
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Solution Overview
Problem
In E-UTRA/E-UTRAN communication systems, the existing time multiplexing in uplink and downlink transmissions is inefficient due to timing misalignment, leading to delayed Handover complete messages, which causes path switching and downlink data transmission delays, especially when MAC control information has higher priority than SRB and DRB, resulting in discarded data and delayed service activation.
Innovation Solution
A communication terminal and base station configuration that allows priority control over MAC control information, SRB, and DRB, enabling flexible transmission of high-priority information based on specific communication service requirements, such as VoIP, to minimize delays and optimize data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MAC control information is assigned higher priority than SRB and DRB, then control information transmission is improved, but Handover complete message transmission is delayed
Solution Approach 1:
The patent implements dynamic priority adjustment where the priority of MAC control information relative to SRB and DRB is not fixed but can be changed based on the specific message type and communication service requirements. This allows the system to optimize transmission timing for different scenarios such as VoIP, browsing, and handover operations.
Solution Approach 2:
The patent changes the priority parameter of MAC control information dynamically. By adjusting the priority level according to the message type (e.g., Handover complete, UL data resuming) and service requirements, the system resolves the contradiction between ensuring control information transmission and preventing Handover complete message delays.
2Reliability
If MAC control information is transmitted with high priority, then control information delivery is improved, but path switching delay increases
Solution Approach 1:
The patent applies dynamic priority adjustment to control the transmission timing of MAC control information. By making the priority level adjustable based on message type and service requirements, the system can ensure timely control information delivery while minimizing impact on path switching operations.
Solution Approach 2:
The patent modifies the priority parameter of MAC control information dynamically. This parameter change allows the system to balance between ensuring control information delivery and reducing path switching delays by transmitting high-priority control information at appropriate times without blocking critical handover messages.
3Reliability
If downlink data transmission starts after Handover complete message, then data integrity is improved, but downlink data transmission start time is delayed
Solution Approach 1:
The patent implements dynamic priority adjustment that allows downlink data transmission to start before Handover complete message is transmitted under certain conditions. By dynamically changing the priority of MAC control information based on service requirements, the system can overlap data transmission with handover completion, improving both timing and integrity.
Solution Approach 2:
The patent changes the priority parameter to enable flexible transmission scheduling. This allows the system to start downlink data transmission earlier while maintaining data integrity by adjusting the priority levels according to the specific communication scenario and service requirements.
4Reliability
If MAC control information priority is increased, then control information transmission reliability is improved, but communication service activation time increases
Solution Approach 1:
The patent applies dynamic priority adjustment where the priority of MAC control information is adapted based on the specific communication service (e.g., VoIP, browsing). This allows the system to maintain control information transmission reliability while reducing service activation time by optimizing priority levels for different service types.
Solution Approach 2:
The patent modifies the priority parameter dynamically according to service requirements. By changing the priority level of MAC control information based on the specific communication service, the system achieves both reliable control information transmission and faster service activation.
Data Source
AI summary
A communication terminal which communicates with a base station is configured to control a priority of control information to be transmitted to the base station in accordance with: a priority of medium access control (MAC) control information which indicates a priority individually assigned to plural pieces of MAC control information; a priority individually assigned to plural pieces of signaling radio bearer (SRB) for transmitting radio resource control (RRC) control information; and a priority assigned to at least one data radio bearer (DRB). The communication terminal is further configured to generate a transmission message in accordance with the control of the priority of control information.