Dual E-AGCH Design for Seamless UE Data Transmission
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Solution Overview
Problem
In conventional WCDMA systems, data transmission interruptions occur for UE2 when the network side device stops transmitting to all UEs and then restarts transmission to UE2 through a new E-AGCH, causing disruptions in data communication.
Innovation Solution
The user equipment (UE) receives both conventional and new enhanced-absolute grant channels, detecting absolute grant values on these channels to continue data transmission seamlessly, ensuring continuity and efficiency by controlling data operations based on detected grant information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the network side device stops transmission of all UEs after sending an AG to a UE1 through the new E-AGCH, then the AG can be delivered to the target UE, but data transmission interruption occurs for other UEs including UE2
Solution Approach 1:
The patent divides the E-AGCH into two separate channels: conventional E-AGCH and new E-AGCH. Each channel serves specific purposes - the conventional channel maintains existing UE transmissions while the new channel delivers AGs to new UEs without interrupting ongoing transmissions to other UEs.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network side device uses the new E-AGCH to deliver AGs to target UEs while the conventional E-AGCH continues to serve other UEs. This intermediary channel structure allows simultaneous operation without mutual interference, preventing transmission interruptions.
2Device complexity
If the network side device uses a single E-AGCH to deliver AGs to multiple UEs sequentially, then the channel structure remains simple, but data transmission interruptions occur when switching between UEs
Solution Approach 1:
The patent segments the single E-AGCH into two parallel channels (conventional E-AGCH and new E-AGCH). This segmentation allows the system to maintain simple channel structures individually while achieving reliable continuous transmission collectively by eliminating the need to stop all transmissions during UE switching.
3Adaptability or versatility
If the network side device sends AG to UE1 through new E-AGCH and then sends AG to UE2 at the next moment, then scheduling flexibility is improved, but UE2 experiences transmission interruption
Solution Approach 1:
The patent ensures continuity of useful action by allowing the conventional E-AGCH to maintain ongoing UE transmissions while the new E-AGCH handles new UE scheduling. This dual-channel approach eliminates transmission interruptions and idle times during UE switching, as each channel operates independently and continuously.
Data Source
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AI summary
The present invention provides a method for transmitting an absolute grant and a user equipment, where the method includes: receiving, by a user equipment, a conventional enhanced-absolute grant channel E-AGCH and a newly-added grant detecting E-AGCH that are sent by a network side device; and detecting, by the user equipment, absolute grant AG information carried on at least one channel of the conventional E-AGCH and the grant detecting E-AGCH, and controlling data transmission of the user equipment according to a detection result. By using the technical solutions provided by embodiments of the present invention, continuity of the data transmission of the user equipment can be ensured, and transmission efficiency is improved.