阅读说明：本技术 一种物联网的通信方法及系统 (Communication method and system of Internet of things ) 是由 黎光洁 王明威 李春宏 吴冶 于 2018-08-06 设计创作，主要内容包括：本发明公开了一种物联网的通信方法及系统,该通信方法应用在基站中,基站连接终端设备,通信方法包括：统计无线帧的符号个数,并产生随机比特序列,其中,随机比特序列中的比特个数与无线帧的符号个数相同；对随机比特序列的每一比特进行调制产生随机相位,得到随机相位序列；按顺序将随机相位序列中的每一随机相位与无线帧的每一符号进行相乘操作,得到加扰无线帧,其中,同一个符号中的所有样点均乘以同一个随机相位；根据加扰无线帧与终端设备进行通信。实施本发明能够在不增加接收机复杂度的前提下抗同频干扰。(The invention discloses a communication method and a system of the Internet of things, wherein the communication method is applied to a base station, the base station is connected with terminal equipment, and the communication method comprises the following steps: counting the number of symbols of the wireless frame and generating a random bit sequence, wherein the number of bits in the random bit sequence is the same as the number of symbols of the wireless frame; modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence; multiplying each random phase in the random phase sequence by each symbol of the radio frame in sequence to obtain a scrambled radio frame, wherein all sampling points in the same symbol are multiplied by the same random phase; and communicating with the terminal equipment according to the scrambled radio frame. The invention can resist same frequency interference without increasing the complexity of the receiver.)

1. The communication method of the Internet of things is applied to a base station, the base station is connected with terminal equipment, and the communication method comprises the following steps:

counting the number of symbols of a wireless frame and generating a random bit sequence, wherein the number of bits in the random bit sequence is the same as the number of symbols of the wireless frame;

modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence;

multiplying each random phase in the random phase sequence with each symbol of the wireless frame in sequence to obtain a scrambled wireless frame, wherein all sampling points in the same symbol are multiplied by the same random phase;

and communicating with the terminal equipment according to the scrambled radio frame.

2. The communication method of claim 1, wherein the random bit sequence is a pseudo-random sequence.

3. A communication method according to claim 2, wherein the random bit sequence is a Gold sequence.

4. A communication method according to any one of claims 1 to 3, wherein the modulation scheme of the bits is 1/8Pi 8PSK modulation or BPSK modulation.

5. The communication system of the Internet of things is characterized by comprising a base station and at least one terminal device which communicates with the base station, wherein the base station comprises a sequence generation module, a modulation module, a scrambling module and a data transmission module;

the sequence generation module is used for counting the number of symbols of a wireless frame and generating a random bit sequence, wherein the number of bits in the random bit sequence is the same as the number of symbols of the wireless frame;

the modulation module is used for modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence;

the scrambling module is used for multiplying each random phase in the random phase sequence by each symbol of the wireless frame in sequence to obtain a scrambled wireless frame, wherein all sampling points in the same symbol are multiplied by the same random phase;

and the data transmission module is used for communicating with the terminal equipment according to the scrambling radio frame.

6. The communication system of claim 5, wherein the random bit sequence is a pseudo-random sequence.

7. The communication system of claim 6, wherein the random bit sequence is a Gold sequence.

8. A communication system according to any of claims 5 to 7, characterized in that the modulation scheme of the bits is 1/8Pi 8PSK modulation or BPSK modulation.

Technical Field

The invention relates to the technical field of communication of the Internet of things, in particular to a communication method and a communication system of the Internet of things.

Background

In the existing communication system of the internet of things, when data is sent in the downlink, different users in the same cell realize multiple access by occupying different subcarriers, but users in adjacent cells may use the same frequency band for data transmission, and at this time, same-frequency interference may be generated between the adjacent cells, thereby reducing the reliability of data communication. In order to resist co-channel interference, in the prior art, QAM (Quadrature Amplitude Modulation) codes are used for scrambling, but the complexity of QAM codes is high, which increases the complexity of a receiver.

Disclosure of Invention

The invention aims to: aiming at the existing problems, the communication method and the communication system of the Internet of things are provided, and the same frequency interference can be resisted on the premise of not increasing the complexity of a receiver.

In order to solve the technical problems, the invention adopts a technical scheme that: the communication method of the Internet of things is applied to a base station, the base station is connected with terminal equipment, and the communication method comprises the following steps: counting the number of symbols of a wireless frame and generating a random bit sequence, wherein the number of bits in the random bit sequence is the same as the number of symbols of the wireless frame; modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence; multiplying each random phase in the random phase sequence with each symbol of the wireless frame in sequence to obtain a scrambled wireless frame, wherein all sampling points in the same symbol are multiplied by the same random phase; and communicating with the terminal equipment according to the scrambled radio frame.

Preferably, the random bit sequence is a pseudo-random sequence.

Preferably, the random bit sequence is a Gold sequence.

Preferably, the modulation scheme of the bits is 1/8Pi 8PSK modulation or BPSK modulation.

In order to solve the technical problem, the invention adopts another technical scheme that: the communication system of the Internet of things is provided and comprises a base station and at least one terminal device which communicates with the base station, wherein the base station comprises a sequence generation module, a modulation module, a scrambling module and a data transmission module; the sequence generation module is used for counting the number of symbols of a wireless frame and generating a random bit sequence, wherein the number of bits in the random bit sequence is the same as the number of symbols of the wireless frame; the modulation module is used for modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence; the scrambling module is used for multiplying each random phase in the random phase sequence by each symbol of the wireless frame in sequence to obtain a scrambled wireless frame, wherein all sampling points in the same symbol are multiplied by the same random phase; and the data transmission module is used for communicating with the terminal equipment according to the scrambling radio frame.

Preferably, the random bit sequence is a pseudo-random sequence.

Preferably, the random bit sequence is a Gold sequence.

Preferably, the modulation scheme of the bits is 1/8Pi 8PSK modulation or BPSK modulation.

In summary, due to the adoption of the technical scheme, each symbol of the wireless frame is multiplied by a random phase, and the random phase is obtained by modulating each bit of the random bit sequence, so that co-channel interference can be inhibited to a certain extent due to the adoption of different random bit sequences among different systems or different base stations, and the generation process of the random bit sequence is simpler, so that the co-channel interference can be resisted on the premise of not increasing the complexity of a receiver.

Drawings

Fig. 1 is a schematic flow chart of a communication method of the internet of things according to an embodiment of the present invention.

Fig. 2 is a schematic architecture diagram of a communication system of the internet of things according to an embodiment of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Fig. 1 is a schematic flow chart of a communication method in the internet of things according to an embodiment of the present invention. In the embodiment of the invention, a communication method of the internet of things is applied to a base station, the base station is connected with a terminal device, and the communication method comprises the following steps:

counting the number of symbols of the wireless frame and generating a random bit sequence, wherein the number of bits in the random bit sequence is the same as the number of symbols of the wireless frame;

modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence;

multiplying each random phase in the random phase sequence by each symbol of the radio frame in sequence to obtain a scrambled radio frame, wherein all sampling points in the same symbol are multiplied by the same random phase;

and communicating with the terminal equipment according to the scrambled radio frame.

A radio frame may include multiple slot slots, and a slot includes multiple symbols symbol, so that after the frame structure of the radio frame is determined, the number of symbols symbol included in the radio frame may be determined. Each symbol comprises a plurality of samples.

The random bit sequence may be a pseudo-random sequence, such as a Gold sequence. The Gold sequence has excellent auto-correlation and cross-correlation characteristics and is simple in structure. It is a composite sequence of m-sequences, preferably obtained by bitwise modulo-2 addition of two m-sequences of different symbols controlled by a synchronous clock.

The bit modulation method may be 1/8Pi 8PSK modulation or BPSK modulation. Each bit is modulated to generate a random phase, which is a modulation signal of the bit, and these random phases constitute a random phase sequence.

After each symbol of the radio frame is multiplied by the corresponding random phase, each symbol is phase rotated. Thus, in a certain wireless communication system, for different base stations, different scrambling radio frames used by different base stations are different due to different random bit sequences, and therefore, different base stations do not cause co-channel interference during communication. And, because the complexity of the random bit sequence is not high, the complexity of the corresponding receiver is not increased.

Through the mode, each symbol of a wireless frame is multiplied by a random phase, and the random phase is obtained by modulating each bit of a random bit sequence, so that co-channel interference can be inhibited to a certain extent due to different random bit sequences adopted among different systems or different base stations, and the generation process of the random bit sequence is simple, so that the co-channel interference can be resisted on the premise of not increasing the complexity of a receiver.

Fig. 2 is a schematic structural diagram of a communication system of the internet of things according to an embodiment of the present invention. In the embodiment of the present invention, the communication system includes a base station 10 and at least one terminal device 20 communicating with the base station 10, and the base station 10 includes a sequence generating module 11, a modulating module 12, a scrambling module 13 and a data transmission module 14.

The sequence generating module 11 is configured to count the number of symbols of the radio frame and generate a random bit sequence, where the number of bits in the random bit sequence is the same as the number of symbols of the radio frame.

The modulation module 12 is configured to modulate each bit of the random bit sequence to generate a random phase, so as to obtain a random phase sequence.

The scrambling module 13 is configured to multiply each random phase in the random phase sequence by each symbol of the radio frame in sequence to obtain a scrambled radio frame, where all samples in the same symbol are multiplied by the same phase.

The data transmission module 14 is configured to communicate with the terminal device 20 according to the scrambled radio frame.

The random bit sequence may be a pseudo-random sequence, such as a Gold sequence. The Gold sequence has excellent auto-correlation and cross-correlation characteristics and is simple in structure. It is a composite sequence of m-sequences, preferably obtained by bitwise modulo-2 addition of two m-sequences of different symbols controlled by a synchronous clock.

The bit modulation method may be 1/8Pi 8PSK modulation or BPSK modulation. Each bit is modulated to generate a random phase, which is a modulation signal of the bit, and these random phases constitute a random phase sequence.

After each symbol of the radio frame is multiplied by the corresponding random phase, each symbol is phase rotated. Thus, in a certain wireless communication system, for different base stations, different scrambling radio frames used by different base stations are different due to different random bit sequences, and therefore, different base stations do not cause co-channel interference during communication. And, since the complexity of the random bit sequence is not high. The corresponding receiver complexity does not increase.

Through the mode, each symbol of a wireless frame is multiplied by a random phase, and the random phase is obtained by modulating each bit of a random bit sequence, so that co-channel interference can be inhibited to a certain extent due to different random bit sequences adopted among different systems or different base stations, and the generation process of the random bit sequence is simple, so that the co-channel interference can be resisted on the premise of not increasing the complexity of a receiver.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.