A random access control method for machine-to-machine communication
A machine-to-machine and random access technology, which is applied in the field of the Internet of Things, can solve problems such as resource reuse, changes, and long delays that cannot be considered, and achieve the effect of resource reuse and random access preamble multiplexing
Active Publication Date: 2021-08-17
南京海骅信息技术有限公司
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Problems solved by technology
[0012] (1) Because the machine can only be in the detection state or in the state of sending an occupation signal at the same time, pre-collision control can only be performed on a series of M2M RACHs (used to transmit occupation signals) in the time domain
[0013] (2) The resources used to send random access request information are reserved in advance and cannot be dynamically changed according to the load of the request
Therefore, once a large number of machines are triggered, their random access process will experience a long delay
[0014] (3) Because the execution of multiplexing depends on whether the machine detects the occupancy signal, the hidden node problem and the exposed node problem will reduce the efficiency of resource multiplexing
[0017] (4) Since the gateway UE only forwards the random access request information to the evolved base station, the evolved base station cannot obtain resource multiplexing information
Therefore, the evolved base station cannot consider the situation of resource reuse to schedule the business of future machines
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[0035] The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] In order to overcome the shortcomings of the prior art and avoid the RACH congestion problem, the present invention proposes that the gateway UE (a cellular device capable of acting as a gateway) performs initial collision detection on the random access preamble of the M2M machine. Then, the gateway UE sends a random access detection report to the eNB.
[0037] Thereafter, based on the random access detection reports of all gateway UEs, the eNB can obtain sufficient resource multiplexing information. Therefore, the evolved base station can consider resource multiplexing, and perform resource allocation for the subsequent random access request information and future machine services.
[0038] Each gateway UE can automatically determine the signal sent by the machine according to its previously reported ...
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The invention discloses a random access control method for machine-to-machine communication. The method includes the following steps: the machine sends a preamble sequence to a cellular device as a gateway; the cellular device performs initial collision detection according to the preamble sequence, and sends a random access detection report to the evolved base station; the evolved base station allocates random access according to the random access detection report into resources. The invention avoids the problem of hidden nodes and exposed nodes, performs dynamic resource allocation on random access request information, and realizes resource multiplexing and random access preamble multiplexing.
Description
technical field [0001] The invention relates to a random access control method, in particular to a random access control method for machine-to-machine communication, and belongs to the technical field of the Internet of Things. Background technique [0002] In the future Internet of Things (Internet of Things) world, Machine-to-machine communication (M2M for short) is considered to be one of the most important technical forms. M2M technology focuses on the interconnection and centralized control management of mobile terminals, and is the main IoT business field of communication operators. At present, how to deeply integrate wireless sensors, sensor networks and cellular wireless systems is still one of the main technical problems to be solved urgently in M2M technology. [0003] figure 1 An example of a solution for implementing M2M technology in a cellular wireless system in the prior art is shown. The system includes an evolved base station (referred to as eNB), multipl...
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IPC IPC(8): H04W24/10H04W72/12H04W74/08H04W4/70
CPCH04W24/10H04W72/1263H04W74/0833H04W74/0858H04W72/54
Inventor 钱骅周婷王海峰
Owner 南京海骅信息技术有限公司