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Random access method based on fdd-lte network

A random access and random access response technology, applied in the field of communication, can solve the problem of high preamble collision probability, and achieve the effects of low preamble collision probability, reduced collision probability, and high throughput

Active Publication Date: 2019-07-30
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a random access method based on FDD-LTE network to solve the problem that there are many machine-type communication devices MTCD requesting access in the existing random access method , a technical problem with a high preamble collision probability

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  • Random access method based on fdd-lte network
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  • Random access method based on fdd-lte network

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Refer to attached figure 1 , the concrete steps of the present invention are as follows.

[0036] Step 1, generate random numbers.

[0037] Each machine type communication device MTCD that has an access request to the base station generates a random number that obeys the uniform distribution between [0, 1].

[0038] Step 2, the machine type communication device MTCD, judges whether the generated random number is smaller than the access level broadcast by the base station and prohibits the ACB parameter b 1 , 0≤b 1 ≤1, if so, use the machine type communication device MTCD as the primary machine type communication device MTCD, and perform step (3); otherwise, use the machine type communication device MTCD as the secondary machine type communication device MTCD, and wait for the base station to issue random access After responding to RAR, perform step (5).

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Abstract

The invention discloses a random access method based on a FDD-LTE (Frequency Division Duplexing-Long Term Evolution) network. The method comprises specific steps: 1, a random number is generated; 2, whether the random number is smaller than an ACB (Access Class Barring) parameter is judged; 3, a random access preamble is transmitted; 4, a base station issues a random access response (RAR); 5, the RAR is received; 6, scheduling information is transmitted; 7, the base station issues a conflict resolution response; and 8, the random access process is over. By using a PUSCH (Physical Uplink Shared Channel) corresponding to a free preamble and a collision preamble, a MTCD (Machine Type Communication Device) which does not pass the ACB detection can perform secondary random access, the technical problem that the preamble is high in a collision probability in the existing random access method and can not be used for a second time is solved, and the resource utilization rate and the throughput of the FDD-LTE network are thus improved.

Description

technical field [0001] The present invention belongs to the technical field of communication, and further relates to a random access method based on Frequency Division Duplexing Long Term Evolution (FDD-LTE) network in the technical field of wireless communication. The present invention can be used to randomly access a machine type communication device MTCD (Machine Type Communication Device) to a Frequency Division Duplex Long Term Evolution FDD-LTE base station, and can effectively solve the problem of high preamble collision probability in the existing random access method and the inability to Secondary use of technical issues, thereby improving system resource utilization and throughput. Background technique [0002] The LTE network was originally designed for H2H (Human to Human) communication, and cannot handle a large number of burst access requests. In the application scenario of M2M (Machine to Machine) communication, the number of MTCDs continues to increase, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/00H04W74/00H04W74/08
CPCH04W4/70H04W74/002H04W74/0833H04W74/085
Inventor 孙岳朱玉李颖
Owner XIDIAN UNIV