An access method and system for an m2m device when accessing a base station
A technology for device access and access methods, applied in access restrictions, machine-to-machine/machine-type communication services, advanced technologies, etc., can solve problems such as battery drain network coverage, RACH conflicts, drops, etc.
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Embodiment 1
[0074] The present invention simulates the scenario of large-scale M2M device access in a multi-cellular scenario, considering that due to simultaneous access of too many devices, the base station will face overload problems, and the device will also fail to access due to the overload of the base station. In the non-overlapping area of the cell, since there is only one base station that can provide services, the device can only access this base station, while in the overlapping area, since there are multiple base stations that can provide services, the devices located in the overlapping area will choose A base station with a lower load, thereby improving the access success rate. The present invention provides an access method for an M2M device when accessing a base station, using a random access algorithm that jointly optimizes the access success probability and energy efficiency while ensuring the device QoS, thereby improving the access success rate of the device and reduci...
Embodiment 2
[0114] The embodiment of the present invention is not a two-layer cycle, and the built model is as follows figure 1 As shown, it completely corresponds to the introduction of the overlapping cellular network in the summary of the invention.
[0115] 1) For the system model, it is first considered that when large-scale M2M devices enter the base station at the same time, the load of the base station will be too large. In general, some devices cannot be connected to the base station, which increases the access delay. To this end, each base station in the system generates a blocking factor, which limits the number of M2M devices that simultaneously access the base station each time, and reduces the access delay of the devices. For a device located in overlapping service areas of multiple base stations, since there are multiple accessible base stations for selection, the device can select a base station with a lower load to improve its own access success rate.
[0116] 2) In orde...
Embodiment 3
[0119] Based on the same inventive concept, the present invention also provides an access system for M2M equipment accessing a base station, its structure diagram is as follows Figure 9 shown, including:
[0120] A calculation module 301, configured to calculate the preamble collision probability when an M2M device located in an overlapping cellular area selects to access a base station;
[0121] The base station selection and power allocation module 302 is configured to use a non-cooperative game with optimal energy efficiency to perform base station selection and power allocation for M2M devices in overlapping areas, so that M2M devices with optimal energy efficiency access the base station.
[0122] The calculation module 301 further includes:
[0123] A judging module, configured to judge whether to allow access to the base station;
[0124] The access module is used for the M2M equipment to randomly access the base station;
[0125] The first calculation module is use...
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