Paging Message Small Data Transmission
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data volume in wireless communication systems pose challenges for base stations (BS) to efficiently transmit and receive data using limited radio resources, particularly for small amounts of infrequently occurring data, which existing methods struggle to address effectively.
Innovation Solution
A method that involves the base station including small data in a paging message to user equipment (UE), allowing the UE to acknowledge receipt without waiting for a response from the BS, enabling efficient transmission and reception of uplink/downlink signals and maintaining backward compatibility with legacy systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station transmits small data through traditional dedicated signaling channels, then data transmission reliability is improved, but resource consumption increases and transmission latency increases
Solution Approach 1:
The patent combines small data transmission with the paging channel, merging two previously separate functions (paging notification and small data transmission) into a single channel. This allows small data to be carried along with paging messages, reducing the need for dedicated signaling resources while maintaining transmission reliability through the established paging infrastructure.
Solution Approach 2:
The paging channel is given multi-functionality by enabling it to carry both traditional paging messages and small data transmissions. This universal approach allows the same channel to serve multiple purposes, reducing overall system resource consumption while efficiently handling both control plane and user plane data.
2Reliability
If the user equipment waits for base station response after receiving small data, then data transmission accuracy is improved, but transmission latency increases
Solution Approach 1:
The base station includes an indication field in the paging message that preliminarily informs the UE whether small data is present and whether an acknowledgment is required. This preliminary information allows the UE to immediately process the paging message and determine the appropriate action without waiting for additional responses, reducing latency while maintaining accuracy through the pre-provided indication.
3Reliability
If the base station establishes RRC connection for small data transmission, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
Instead of establishing a full RRC connection for small data transmission, the patent uses a partial approach by leveraging the existing paging channel and message structure. This partial action provides sufficient reliability for small data while avoiding the overhead and complexity of complete connection establishment, particularly beneficial for idle mode UEs.
4Adaptability or versatility
If traditional paging messages are used without small data, then backward compatibility is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent enhances the paging message structure to universally support both traditional paging functions and small data transmission. By incorporating flexible indication fields and data containers within the existing paging framework, the system maintains backward compatibility with legacy devices while enabling efficient resource utilization through multi-functional paging messages.
Solution Approach 2:
The patent modifies paging message parameters by adding indication fields and optional data containers without fundamentally changing the message structure. This parameter-level evolution allows the system to maintain compatibility with existing devices while enabling new small data transmission capabilities, thereby improving resource utilization efficiency.
Data Source
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AI summary
A network node of the present invention transmits downlink data for user equipment using a paging message. The user equipment can transmit to the network node a radio resource control (RRC) connection request message including acknowledgement information that indicates acknowledgement of the downlink data if the paging message contains the downlink data for the user equipment. The network node can transmit to the user equipment an RRC connection refusal message including information that indicates confirmation with respect to the acknowledgement information if the paging message contains the downlink data for the user equipment and the RRC connection request message contains the acknowledgement information.