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Frequency range distribution and access method capable of flexible using spectrum resource and its system

A technology of spectrum resource and access method, which is applied in the field of frequency band allocation and access and its system that can flexibly utilize spectrum resources, can solve problems such as limiting spectrum resource utilization, paired frequencies are rare, etc., to reduce complexity, High reliability, avoiding the effect of uplink false transmission

Inactive Publication Date: 2007-05-02
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0005] Under the condition that the allocation of spectrum resources in various countries is becoming more and more complicated, paired frequencies available for allocation of frequency division duplex are relatively scarce. The current frequency division duplex method requires equal uplink and downlink bandwidths, and the conditions of fixed access frequency difference limit the Utilization of some scattered spectrum resources that do not meet the above requirements, therefore, it is necessary to provide a more flexible method of spectrum resource allocation

Method used

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  • Frequency range distribution and access method capable of flexible using spectrum resource and its system
  • Frequency range distribution and access method capable of flexible using spectrum resource and its system
  • Frequency range distribution and access method capable of flexible using spectrum resource and its system

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Embodiment Construction

[0044] FIG. 1 shows an access system according to an embodiment of the present invention, including a wireless access device and its handheld device.

[0045] According to the general principle of frequency division communication in this embodiment, when the frequency band is allocated on the wireless access device, the uplink and downlink of the communication channel occupy different frequency bands respectively. Uplink uses a lower frequency band than downlink. Different from the existing frequency band allocation method, the uplink and downlink of the present invention can use different bandwidths, and the frequency difference between the two can be selected in many ways. For handheld devices, the uplink frequency band is not fixed. In this way, for a wireless access device, it is necessary to notify the handheld device of the uplink frequency band information that it currently allows the handheld device to use, and the handheld device needs to judge whether it is capable o...

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Abstract

This invention discloses a band distribution and access method and its system flexibly utilizing spectrum resource, which first of all configures up and down bands of communication channels on a radio access device, frequency bands with low frequencies are used in the up channel and different values can be selected for the up or down bandwidth and frequency difference, the radio access device allows that the matched information of the up band used by handheld device is sent to the handheld device, which searches for the down signals to get matched information of the up band then to compute the up band allowed emitted, when the handheld device judges it has the ability to emit signals on it, it sends a connection request to a radio access device, which receives it and analyzes it, if it is successful, it sets up an up radio channel to finish the access process.

Description

technical field [0001] The invention relates to a frequency band allocation and access method and system of a communication system adopting a frequency division duplex mode. Background technique [0002] There are two types of duplex in communication: time division duplex (TDD) and frequency division duplex (FDD). [0003] TDD occupies a continuous frequency band, and the uplink and downlink are transmitted at different times. Since the uplink and downlink share frequency bands, only one continuous frequency band needs to be allocated. Therefore, the frequency band of TDD can be very flexible. In addition, the similarity between uplink and downlink channels is high, and channel estimation is relatively simple. The disadvantage of time-division duplexing is that in order to prevent uplink and downlink interference, a guard time for uplink and downlink conversion must be set. Since the conversion protection time increases with the increase of the communication range, it wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26
Inventor 左志松
Owner ZTE CORP
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