Base Station Uplink Scheduling for M2M H2H Collision Avoidance
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Solution Overview
Problem
The integration of Machine to Machine (M2M) wireless devices into existing Human to Human (H2H) wireless communication networks leads to collisions in uplink data transmissions due to shared preamble resources, causing inefficiencies in bandwidth allocation.
Innovation Solution
A base station dynamically schedules M2M wireless devices to transmit uplink transmission requests within specific time intervals that are spaced apart from those of H2H devices, using a processor to manage and coordinate these intervals to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If M2M wireless devices share the same preamble resources as H2H wireless devices in existing LTE systems, then backward compatibility is maintained, but collisions occur frequently causing transmission inefficiency
Solution Approach 1:
The patent segments the uplink transmission process into multiple stages: a first time interval for H2H devices to transmit uplink requests, and a second time interval for M2M devices to transmit uplink requests. This temporal segmentation prevents collisions between the two device types while maintaining compatibility with existing LTE frameworks.
Solution Approach 2:
The base station dynamically schedules M2M devices to transmit in the second time interval after receiving their uplink requests in the first time interval. This dynamic scheduling approach allows the system to adapt to varying traffic conditions while preventing collisions through time-division multiplexing.
2Ease of manufacture
If M2M devices use random access mechanism for uplink transmission, then implementation simplicity is maintained, but bandwidth allocation becomes inefficient due to collisions
Solution Approach 1:
The patent segments the random access process by introducing a two-stage time interval structure. M2M devices still use random access within their designated second time interval, but this is separated from H2H device transmissions, thereby maintaining implementation simplicity while improving bandwidth allocation efficiency through collision avoidance.
3Quantity of substance
If M2M devices are deployed concentratively in large numbers, then service coverage is expanded, but collision probability increases significantly
Solution Approach 1:
The patent segments the transmission opportunities by creating distinct time intervals: the first time interval for H2H devices and the second time interval for M2M devices. This segmentation allows large numbers of M2M devices to be deployed without significantly increasing collision probability, as each device has a dedicated time slot for uplink requests.
Solution Approach 2:
The base station periodically switches between receiving uplink requests from H2H devices in the first time interval and M2M devices in the second time interval. This periodic action ensures that M2M devices can transmit reliably even when deployed in large numbers, as the periodic scheduling prevents simultaneous collisions.
Data Source
AI summary
A base station and an uplink transmission method thereof are provided. The base station receives a plurality of first uplink transmission requests of a plurality of first wireless devices of a first group and a plurality of second uplink transmission requests of a plurality of second wireless devices of a second group in a first time interval, and approves one of the second uplink transmission requests. The base station receives second uplink transmission data of the second wireless device corresponding to the approved second uplink transmission request in a second time interval behind the first time interval. The base station receives the second uplink transmission requests of the second wireless devices corresponding to the unapproved second uplink transmission requests in a third time interval behind the second time interval.