Satellite Access Network Synchronous Paging and Data Reception
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Solution Overview
Problem
Satellite communication systems experience increased transmission waiting latency due to the satellite receiving mobile terminated-data (MT-data) only after responding to a Paging message from a terminal device, which delays the forwarding of data to the terminal.
Innovation Solution
The access network device synchronously receives a first paging message and data from a core network element within a specified time threshold, allowing timely data transmission to the terminal device based on acknowledgment from the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the satellite receives MT-data only after receiving a response message for a Paging message from a terminal device, then the system ensures proper acknowledgment and reliability of data transmission, but the transmission waiting latency is greatly increased
Solution Approach 1:
The core network element performs preliminary actions by synchronously transmitting the Paging message and MT-data to the access network device in advance. The access network device caches the MT-data and prepares for immediate transmission upon receiving the terminal's response, eliminating the need to wait for the response before receiving the data.
Solution Approach 2:
The transmission process is segmented into independent phases: (1) synchronous reception of Paging message and MT-data by the access network device, (2) caching of MT-data by the access network device, (3) terminal device response to Paging message, and (4) data transmission to terminal. This segmentation allows the data to be ready in advance without coupling the reception timing to the response timing.
2Productivity
If the access network device caches the first data and transmits it after receiving acknowledgment from the terminal device, then the transmission timing can be optimized, but the system complexity increases
Solution Approach 1:
The access network device serves as an intermediary between the core network element and the terminal device. It receives and caches the MT-data from the core network, monitors for the terminal's response to the Paging message, and then transmits the cached data to the terminal. This intermediary role simplifies the overall system by centralizing the caching and coordination function in one device.
Data Source
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AI summary
Disclosed in the present application are a communication method and apparatus, and a device, a chip, a storage medium, a product and a program. The method comprises: an access network device synchronously receiving a first paging message and first data from a core network element, wherein the first paging message is used to page a terminal device which waits for receiving the first data; and the access network device synchronously receiving the first paging message and the first data from the core network element comprises: the time interval between a time domain in which the access network device receives the first paging message and a time domain in which the access network device receives the first data is less than a first threshold.