Method and apparatus for supporting data transmission of machine communication devices

Abstract

The invention provides a method and apparatus for supporting data transmission of machine communication devices. The method comprises the following steps: determining a data transmission mode for switching; and notifying a network side device to switch the data transmission mode through an unlink message. The flexible switch of the data transmission mode satisfying different service Qos and network performance of an MTC is satisfied.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for supporting data transmission of machine type communication equipment. Background technique [0002] With the rapid development of wireless communication technology and the increasing communication needs of people, the 5G era is approaching. An important application of 5G is Machine Type Communication (MTC, Machine Type Communication). MTC has large-scale potential application prospects, making it widely concerned by a large number of mobile network operators, equipment manufacturers, and research institutions. The main application fields of MTC include smart grid, smart transportation, smart home, remote measurement, wireless sensor network, etc. It is an important part of the emerging Internet of Things. [0003] The services supported by the MTC equipment are diverse. The requirements of most MTC devices are usually low cost and low power consumption, such as...

AI Technical Summary

Problems solved by technology

[0015] 1. The security performance is slightly poor: DRB is not established in the control plane optimization scheme, and neither the network side nor the terminal has an AS security context, and the data cannot be encrypted at the AS layer

[0016] 2. It is not suitable for transmitting a relatively large amount of data: Considering that the NAS PDU attached to the signaling is very limited, the length of the transmitted data packet is limited. For a relatively large data packet, it needs to be divided into too many small packets. Considering that MTC equipment generally does not cover Too good, it is easy to cause packet loss, making it difficult for the receiver to receive complete data packets

Moreover, the control plane method uses signaling to transmit data. Too many small packets will bring too much signaling transmission and occupy too many resources.

[0017] 3. Low-priority data services occupy too high scheduling resources: Generally, the periodic reporting data sent by MTC terminals has a relatively low priority, but because the data is sent in the air interface layer 3 signaling, thus obtaining The same scheduling priority as conventional RRC (Radio Resource Control, radio resource control) signaling will crowd out the scheduling priority of those real RRC access signaling (no MTC data transmission), which may lead to higher air interface access fail

[0020] 1. The signaling optimization effect is not as good as the control plane optimization effect: the control plane optimization method saves more signaling; while the user plane optimization solution needs to restore the bearer context information first, and then transmit data. Relatively speaking, the signaling optimization effect is smaller

[0021] 2. The cost of maintaining the bearer context is relatively large, and there is a risk of misalignment: the terminal and the network side always maintain the terminal MTC service bearer context, and there is a certain system overhead, including memory overhead, CPU (Central Processing Unit, central processing unit) overhead

[0022] The Third Generation Partnership Projects (3GPP for short) network currently provides a method for MTC terminals to negotiate data transmission modes with the network side through the Attach (attach) process, which cannot meet the requirements of various MTC service transmission scenarios in the device. Different Qos requirements; may bring negative impact on the network, such as excessive overhead on the network side, etc.

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