Multicast Control Channel Modification Period Segmentation
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Solution Overview
Problem
In the SC-PTM technology, the SC-MCCH has a unique modification period and repetition period, which cannot simultaneously meet the latency requirements of different multicast services and achieve electricity savings for UE.
Innovation Solution
The method involves a terminal device receiving configuration information indicating multiple modification periods, allowing it to determine the appropriate modification period for each service based on its latency requirements, and monitor the corresponding modification notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a long modification period and long repetition period are configured, then UE electricity consumption is reduced, but control information reading latency is prolonged
Solution Approach 1:
The patent divides the single modification period into multiple modification periods (first modification period and second modification period) with different durations. The first modification period is shorter for latency-sensitive services, while the second is longer for electricity-saving requirements. This segmentation allows different services to have different modification periods simultaneously, resolving the contradiction between latency and energy consumption.
Solution Approach 2:
The patent applies different modification period configurations to different services based on their specific requirements. Latency-sensitive services receive a shorter modification period, while non-latency-sensitive services receive a longer modification period. This local differentiation allows each service to be optimized independently, balancing latency and energy consumption requirements.
2Loss of time
If a short modification period and short repetition period are configured, then control information reading latency is reduced, but UE electricity consumption increases
Solution Approach 1:
The patent segments the modification period into multiple options, allowing the system to select appropriate durations based on service requirements. This enables short modification periods for latency-critical services without forcing all services to use short periods, thereby reducing overall energy consumption.
Solution Approach 2:
Different services are assigned different modification period lengths according to their specific latency requirements. This localized optimization ensures that only services needing low latency use short periods, while other services can use longer periods to save energy.
3Device complexity
If a unique modification period is used for SC-MCCH, then system complexity is reduced, but it cannot meet diverse latency requirements of different services
Solution Approach 1:
The patent segments the modification period parameter into multiple discrete values (first modification period and second modification period). This segmentation maintains relative system simplicity while enabling differentiation between services with different latency requirements, thus resolving the contradiction between complexity and adaptability.
Solution Approach 2:
The system dynamically selects which modification period to use based on service type and latency requirements. This dynamic adaptation allows the system to maintain a manageable configuration space while achieving versatile latency support through conditional application of different periods.
Data Source
AI summary
Methods and apparatuses for sending a multicast control channel are provided. One example method includes a terminal device receiving first configuration information, where the first configuration information indicates N modification periods, and N is an integer greater than 1. The terminal device determines, based on the first configuration information, a modification period corresponding to a first service, and monitors a modification notification of an MCCH based on the modification period corresponding to the first service. Therefore, in some instances, services with different latency sensitivities can correspond to different modification periods to meet latency requirements of different services and ensure an electricity saving effect of the terminal device.