Dynamic System Information Transmission Mode Selection
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Solution Overview
Problem
Current communication technologies face inefficiencies in power consumption and resource utilization due to periodic broadcasting of system information in LTE, especially when fewer user equipment (UE) are accessing the network, leading to resource waste and high power consumption at base stations.
Innovation Solution
Implementing a method to dynamically determine which system information is transmitted in unicast mode and which in broadcast mode based on UE requests, allowing for flexible transmission according to the number of UEs requesting specific information, thereby optimizing power usage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is transmitted in periodic broadcast mode, then all user equipment can receive the information, but power consumption of base station increases and spectrum resource utilization decreases
Solution Approach 1:
The patent segments system information into first type SI (cell selection and accessing related) and second type SI (other system information). The first type SI is transmitted in broadcast mode to ensure all UEs can receive it, while the second type SI is transmitted in unicast mode only to UEs that explicitly request it, thereby reducing overall power consumption and resource utilization.
Solution Approach 2:
The patent dynamically adjusts the transmission mode based on UE requests. The base station determines whether to transmit second type SI in broadcast or unicast mode based on the number of UEs requesting the information. This dynamic adaptation allows the system to optimize between reliability and energy consumption according to actual network conditions.
2Reliability
If system information is transmitted in periodic broadcast mode, then all user equipment can receive the information, but spectrum resource utilization decreases when fewer UEs are accessing the network
Solution Approach 1:
The patent divides system information into two types and applies different transmission strategies. First type SI uses broadcast mode for universal coverage, while second type SI uses unicast mode on demand. This segmentation prevents waste of spectrum resources when fewer UEs are active, as only necessary information is transmitted to requesting UEs rather than broadcasting all information periodically.
Solution Approach 2:
The base station dynamically determines the transmission mode for second type SI based on the number of requesting UEs. When fewer UEs request information, the system switches to unicast mode, thereby improving spectrum resource utilization by transmitting information only to those who need it, rather than maintaining periodic broadcast transmission.
3Reliability
If second type system information is transmitted in broadcast mode by default, then all requesting UEs can receive it, but flexibility to restrict transmission mode is insufficient
Solution Approach 1:
The patent implements dynamic transmission mode selection for second type SI. The base station determines whether to use broadcast or unicast mode based on the number of UEs requesting the information. This dynamic mechanism provides flexibility to adapt to different network conditions, allowing the system to optimize between reliability and resource utilization according to actual demand.
Solution Approach 2:
The patent changes the transmission parameter (mode) based on network conditions. The base station adjusts the transmission mode parameter between broadcast and unicast based on the number of requesting UEs, thereby achieving flexible adaptation to different scenarios while maintaining reliable information delivery.
Data Source
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AI summary
The present disclosure relates to a method and apparatus for sending and receiving system information, and a user equipment and a base station. The method for sending system information comprises: receiving a system information (SI) request sent by at least one user equipment (UE); determining, according to the received SI request, at least one, in the SI requested by each UE, of a first SI set sent in a unicast manner and a second SI set sent in a broadcast manner; and returning, to each UE, a response message of the SI request, wherein the response message carries at least one of the first SI set of the corresponding UE and indication information for instructing the corresponding UE to receive the second SI set. In the embodiments of the present disclosure, by determining, according to a received SI request from at least one UE, at least one, in the SI requested by each UE, of a first SI set sent in a unicast manner and a second SI set sent in a broadcast manner, the unicast of the first SI set and the broadcast of the second SI set to the corresponding UE can be realized, and the sending manner is flexible.