Wireless Device Message Deferral Using Prohibit Timers
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Solution Overview
Problem
In 3GPP LTE standards, User Equipment (UE) frequently transmits similar messages, such as MAC Control Elements and Packet Data Convergence Protocol (PDCP) control PDUs, leading to wasted network resources and bandwidth due to unnecessary transmissions.
Innovation Solution
A method where a wireless device defers the transmission of a first message for a certain time period after transmitting a second message that is at least a partial copy of the first message, using timers to manage transmissions and ensure that messages are not sent too frequently, particularly for MAC CEs and PDCP control PDUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits similar messages (MAC CEs, PDCP control PDUs) frequently to ensure reliable communication, then the communication reliability is improved, but the network resources and bandwidth are wasted due to redundant transmissions
Solution Approach 1:
The patent applies preliminary action by introducing prohibit timers that are started in advance before potential redundant transmissions occur. When a message is transmitted, the timer is activated to prevent subsequent transmissions of substantially identical messages within a predetermined time period, thereby avoiding redundant network resource consumption while maintaining communication reliability through proper timing control
Solution Approach 2:
The patent implements feedback mechanisms where the UE monitors whether a transmitted message is substantially identical to a previously transmitted message. This feedback loop compares current transmission content with historical transmissions and uses the prohibit timer to control subsequent transmissions, preventing redundant messaging while ensuring reliable communication when needed
2Loss of energy
If the UE uses prohibit timers to prevent frequent transmissions of similar messages, then the network resource waste is reduced, but the device complexity increases due to timer management and message comparison mechanisms
Solution Approach 1:
The patent applies universality by implementing a single prohibit timer mechanism that serves multiple functions: preventing redundant MAC CE transmissions, preventing redundant PDCP control PDU transmissions, and managing transmission intervals for different message types. This multi-functional approach reduces overall system complexity compared to having separate control mechanisms for each message type
Solution Approach 2:
The patent uses parameter changes by configuring the prohibit timer with different time period values depending on the message type and transmission scenario. The timer duration can be adjusted based on whether the message is a MAC CE or PDCP control PDU, and whether it's an initial transmission or subsequent transmission, allowing flexible control without increasing structural complexity
Data Source
AI summary
Systems and methods of deferring a transmission of a message are provided. In one exemplary embodiment, a method by a wireless device (105, 200, 300a-b, 600) comprises determining (1001) whether a timer (106, 205) associated with deferring a transmission (107) of a message (113) on a certain uplink or downlink logical channel is configured and not running for that certain uplink or downlink logical channel. Further, the method includes transmitting (1011), to a network node (101), the message on that certain uplink or downlink logical channel responsive to determining that the timer is configured and not running for that certain uplink or downlink logical channel.