Direct Downlink Data Transmission via Scrambled Control Channel
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Solution Overview
Problem
In machine-to-machine (M2M) communication systems, the process of data transmission between user equipment (UE) and access network devices is inefficient due to multiple signaling exchanges required for establishing a radio link, leading to high network resource occupation and low data transmission efficiency, especially when sending sparse and small data packets.
Innovation Solution
A data transmission method where the access network device scrambles a control channel using a higher layer identifier of the UE, such as S-TMSI or RNTI, to directly send data to the UE without initiating a random access process, reducing the number of signaling exchanges and allowing the UE to receive data without establishing a radio link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE establishes a radio link through random access, then reliable data transmission is achieved, but multiple signaling exchanges occur occupying network resources
Solution Approach 1:
The network side performs preliminary actions by pre-configuring downlink data transmission resources and sending data directly to the UE without requiring the UE to initiate random access first. The network prepares and transmits data in advance, eliminating the need for multiple signaling exchanges while ensuring reliable delivery through pre-established transmission parameters.
2Productivity
If the UE establishes a radio link through random access, then data transmission is enabled, but the process is complex with multiple signaling exchanges
Solution Approach 1:
The patent inverts the traditional random access initiation direction by allowing the network side to directly initiate downlink data transmission without waiting for UE-triggered random access. This reversal eliminates the multi-step signaling exchange complexity while maintaining transmission reliability, as the network can directly send data using pre-configured resources.
3Productivity
If the network sends data to idle UE through random access, then data delivery is achieved, but network resources are heavily occupied
Solution Approach 1:
The patent extracts and removes the unnecessary random access signaling steps from the data transmission process. By directly sending downlink data to the UE using pre-configured resources, the method eliminates multiple signaling exchanges that traditionally occupied network resources, thereby reducing overall resource consumption while maintaining data delivery capability.
Data Source
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AI summary
Embodiments of the present invention provide a data transmission method, a device, and a system, and relate to the communications field, to reduce signaling exchanges between an access network device and a UE, thereby saving network resources and improving data transmission efficiency. The data transmission method includes: receiving, by a user equipment UE, a scrambled control channel; descrambling, by the UE, the scrambled control channel by using a first identifier, to obtain control information and cyclic redundancy code CRC; and after the UE completes a check on the CRC, receiving, by the UE according to the control information, data sent by an access network device.