M2M Uplink Data Transmission Without Random Access
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Solution Overview
Problem
Current Machine-to-Machine (M2M) data transmission methods, particularly using the Pull mechanism, result in low transmission efficiency due to the need for establishing connections and bearers, leading to high signaling load and increased collision probabilities, affecting other devices.
Innovation Solution
The method involves receiving a paging message to determine an opportunity for acquiring an uplink transmission resource, acquiring that resource without random access, and reporting user data using a stored time advance, thereby eliminating the need for RRC connection or user plane bearer establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Pull mechanism is adopted for M2M data transmission, then the wireless network can effectively control communication traffic and prevent congestion, but the transmission efficiency is low due to the need for establishing connection and bearer procedures
Solution Approach 1:
The patent extracts and eliminates the unnecessary connection establishment and bearer setup procedures from the data transmission process. M2M devices transmit uplink data directly in the uplink shared channel without requiring RRC connection or user plane bearer establishment, thereby removing the signaling overhead while maintaining network control through the Pull mechanism.
Solution Approach 2:
The patent pre-configures M2M devices with uplink transmission resources and timing advance values before data transmission. The network allocates uplink shared channel resources in advance, and devices store timing advance values for direct transmission without needing to perform random access or connection setup procedures when data needs to be sent.
2Reliability
If connection and bearer establishment procedures are performed for each data transmission, then reliable data transmission can be ensured, but the signaling load on the base station increases and transmission efficiency decreases
Solution Approach 1:
The patent removes the connection establishment and bearer setup signaling procedures from the data transmission process. Devices transmit data directly using pre-configured uplink shared channel resources without performing random access, RRC connection setup, or user plane bearer establishment, significantly reducing signaling load while maintaining transmission reliability through resource allocation and timing advance mechanisms.
3Ease of operation
If random access procedures are performed by each M2M device, then uplink transmission resources can be acquired, but the probability of collision in random accesses increases and affects other normal terminals
Solution Approach 1:
The patent eliminates the random access procedure from the M2M data transmission process. Devices acquire uplink transmission resources through pre-allocation by the network and direct transmission in the uplink shared channel, completely avoiding the collision problems associated with random access while maintaining ease of resource acquisition through network-controlled resource distribution.
Data Source
AI summary
A method for data transmission, comprising: receiving, by a device, a paging message, and determining an opportunity for acquiring an uplink transmission resource, by basing on a subframe for receiving the paging message; acquiring, by the device, an uplink transmission resource at the opportunity for acquiring the uplink transmission resource; and reporting, by the device, user data in the uplink transmission resource, by using a time advance that is stored in the device itself and that corresponds to a current position. According to the embodiments of the present invention, no random access is required when the MTC device transmits uplink data, and no RRC connection or user plane bearer is to be established, which greatly simplifies the procedures of data transmission for the device, and the device can quickly and high-efficiently transmit uplink data, thereby improving the transmission efficiency, and reducing the signaling load of the base station.