CN113630360B - Frequency hopping method and device for wireless communication - Google Patents
Frequency hopping method and device for wireless communication Download PDFInfo
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- CN113630360B CN113630360B CN202110913220.3A CN202110913220A CN113630360B CN 113630360 B CN113630360 B CN 113630360B CN 202110913220 A CN202110913220 A CN 202110913220A CN 113630360 B CN113630360 B CN 113630360B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7143—Arrangements for generation of hop patterns
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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Abstract
The invention provides a frequency hopping method for a broadband OFDM system, which comprises the following steps: step 110: the sending end sends the initial configuration information to the receiving end; step 120: the sending end and the receiving end generate the same pseudo-random sequence according to the initial configuration information; step 130: the sending end and the receiving end generate the same frequency hopping map of the in-band BWP according to the same pseudo-random sequence; step 140: and according to the same in-band BWP frequency hopping map, the sending end transmits an in-band BWP configuration instruction to the OFDM modulation module, and the receiving end transmits the same BWP configuration instruction as the sending end to the OFDM demodulation module. Based on the embodiment of the invention, a part of the whole carrier bandwidth can be dynamically and adaptively used for transmission, and meanwhile, the system can sense the interference severity degree in the current carrier bandwidth and select in an in-band frequency hopping mode and an in-band and out-of-band combined frequency hopping mode according to the interference degree.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a Frequency hopping method, device, and system for Orthogonal Frequency Division Multiplexing (OFDM) broadband transmission.
Background
Multimedia services such as ultra-high definition video and the like put forward high-rate transmission requirements on a wireless communication system, and in order to meet the service requirements, a broadband OFDM technology can be applied to the wireless communication system. OFDM is a multi-carrier modulation transmission scheme, in which serial data streams are converted from serial to parallel to form multiple parallel sub-data streams, and then the multiple orthogonal sub-carriers are used for parallel transmission. Due to the orthogonality among the subcarriers, a guard band does not need to be placed among the subcarriers, and the OFDM technology can obtain higher spectral efficiency on limited spectrum resources. Meanwhile, the OFDM technology has good bandwidth expansibility, and can effectively meet the requirement of high-rate service transmission by applying the OFDM technology on a larger bandwidth.
In a military communication scenario, service transmission needs to meet the requirements for resisting enemy interference in addition to the requirement for high rate. To meet this transmission requirement, frequency hopping communication techniques may be employed on the basis of wideband OFDM techniques. The frequency hopping communication means that radio frequency hops pseudo-randomly and synchronously in a discrete frequency form in an appointed frequency table under the control of the same synchronization algorithm and pseudo-random frequency hopping pattern algorithm by two communication parties. Frequency hopping communication relies on numerous radio frequencies to spread the interference power of an adversary so that the system can still operate effectively under the condition that a certain number of communication frequencies are interfered. Meanwhile, the hopping speed of the frequency hopping communication is higher than that of the tracking interference machine, and the randomness and the nonlinearity of a frequency hopping pattern are adopted, so that tracking interference can be avoided.
However, for the broadband OFDM system, the existing frequency hopping technology implements frequency hopping by switching subcarriers, and this frequency hopping method is difficult to effectively resist broadband interference and to ensure broadband transmission rate.
Disclosure of Invention
The present invention is directed to the above problem, and according to a first aspect of the present invention, a frequency hopping method for a wideband OFDM system is provided, including:
step 110: the sending end sends the initial configuration information to the receiving end;
step 120: the sending end and the receiving end generate the same pseudo-random sequence according to the initial configuration information;
step 130: the sending end and the receiving end generate the same frequency hopping map of the in-band BWP according to the same pseudo-random sequence;
step 140: and according to the same in-band BWP frequency hopping map, the sending end transmits an in-band BWP configuration instruction to the OFDM modulation module, and the receiving end transmits the same BWP configuration instruction as the sending end to the OFDM demodulation module.
In one embodiment of the present invention, wherein the initial configuration information in step 110 includes initial state information of the pseudo-random sequence generator, a hop-starting time, and an in-band BWP hop period.
According to a second aspect of the present invention, there is provided a frequency hopping method for frequency hopping of a broadband OFDM system, comprising:
step 210: the sending end sends the initial configuration information to the receiving end;
step 220: the sending end generates two lines of pseudorandom sequences which are independent from each other and have different periods according to the initial configuration information, and the receiving end generates two lines of pseudorandom sequences which are the same as the sending end according to the initial state information;
step 230: the sending end and the receiving end respectively generate the same in-band BWP frequency hopping map and the same out-of-band frequency hopping map according to the two same pseudorandom sequences;
step 240: in the frequency hopping process, a sending end senses the interference severity degree in the frequency band of the current frequency hopping carrier in real time, and an in-band frequency hopping mode and/or an out-of-band frequency hopping mode are/is predicted to be selected according to the interference severity degree;
step 250: the sending end sends the frequency hopping mode to the receiving end, and the sending end and the receiving end adopt the same frequency hopping mode to carry out communication;
step 260: according to the same in-band BWP frequency hopping map, the sending end transmits an in-band BWP configuration instruction to the OFDM modulation module, and the receiving end transmits the same BWP configuration instruction as the sending end to the OFDM demodulation module and/or
And according to the same in-band BWP frequency hopping map, the sending end transmits the out-of-band frequency hopping carrier central frequency point configuration instruction to the up-conversion module, and the receiving end transmits the same frequency hopping carrier central frequency point configuration instruction as the sending end to the down-conversion module.
In one embodiment of the present invention, further comprising:
step 270: steps 240, 250, 260 are performed cyclically.
According to a third aspect of the present invention, there is provided a frequency hopping apparatus at a transmitting end for wireless communication, comprising an in-band hopping pseudo-random sequence generator, an in-band BWP hopping pattern generator, an in-band hopping information interface,
the in-band frequency hopping pseudo-random sequence generator is used for generating pseudo-random number sequences for generating an in-band BWP frequency hopping pattern; the in-band BWP frequency hopping map generator is used for recording the available BWP resources in each carrier frequency band and generating an in-band BWP frequency hopping map; the in-band frequency hopping information interface is used for transmitting the in-band BWP configuration instruction to the OFDM modulation module.
In one embodiment of the invention, the device also comprises an out-of-band frequency hopping pseudo-random sequence generator, an out-of-band frequency hopping pattern generator, an out-of-band frequency hopping information interface, an interference perception and frequency hopping mode selection module,
the in-band frequency hopping pseudo-random sequence generator and the out-of-band frequency hopping pseudo-random sequence generator are mutually independent to generate pseudo-random number sequences and are respectively used for generating an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern; the out-of-band frequency hopping pattern generator is used for recording available carrier resources and generating an out-of-band frequency hopping pattern; the out-of-band frequency hopping information interface is used for transmitting an out-of-band frequency hopping configuration instruction to the up-conversion module; the interference sensing and frequency hopping mode selection module is used for sensing the interference severity degree in the current frequency hopping carrier frequency band in real time and selecting a proper frequency hopping mode or a frequency hopping mode combination.
According to a fourth aspect of the present invention, there is provided a frequency hopping apparatus at a receiving end for wireless communication, comprising a frequency hopping initial configuration information synchronization module, an in-band frequency hopping pseudo-random sequence generator, an in-band BWP frequency hopping pattern generator, an in-band frequency hopping information interface, a frequency hopping information synchronization module,
the frequency hopping initial configuration information synchronization module is used for synchronizing the initial configuration information of the frequency hopping device at the receiving and transmitting end; the in-band frequency hopping pseudo-random sequence generator is used for generating pseudo-random number sequences for generating an in-band BWP frequency hopping pattern; the in-band BWP frequency hopping map generator is used for recording the available BWP resources in each carrier frequency band and generating an in-band BWP frequency hopping map; the in-band frequency hopping information interface is used for transmitting the in-band BWP configuration instruction to the OFDM modulation module; the frequency hopping information synchronization module is used for synchronously transmitting the frequency hopping information of the transceiving end.
In one embodiment of the invention, the device further comprises an out-of-band frequency hopping pseudo-random sequence generator, an out-of-band frequency hopping pattern generator, a frequency hopping pattern synchronization module and an out-of-band frequency hopping information interface,
the in-band frequency hopping pseudo-random sequence generator and the out-of-band frequency hopping pseudo-random sequence generator are mutually independent to generate pseudo-random number sequences and are respectively used for generating an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern; the out-of-band frequency hopping pattern generator is used for recording available carrier resources and generating an out-of-band frequency hopping pattern; the out-of-band frequency hopping information interface is used for transmitting the out-of-band frequency hopping configuration instruction to the down-conversion module; the frequency hopping mode synchronization module is used for synchronizing the frequency hopping modes of the transceiving ends.
According to a fifth aspect of the present invention, a computer-readable storage medium is proposed, in which one or more computer programs are stored, which when executed are for implementing the inventive frequency hopping method for wideband OFDM systems.
According to a sixth aspect of the invention, there is provided a computing system comprising: a storage device, and one or more processors; wherein the storage means is adapted to store one or more computer programs which, when executed by the processor, are adapted to implement the frequency hopping method for wideband OFDM systems of the invention.
Compared with the prior art, the broadband OFDM frequency hopping system adopting the partial bandwidth transmission technology has the advantages that the broadband OFDM frequency hopping system adopting the partial bandwidth transmission technology can dynamically and adaptively use a partial bandwidth of the whole carrier bandwidth for transmission according to the transmission rate requirement of the service, meanwhile, the system can sense the interference severity degree in the current carrier bandwidth, and selects from an in-band frequency hopping mode and an in-band and out-of-band combined frequency hopping mode according to the interference degree.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 illustrates an OFDM system architecture;
FIG. 2 shows a partial bandwidth transmission diagram;
FIG. 3 illustrates a wideband OFDM system based on partial bandwidth transmission;
FIG. 4 illustrates a wideband OFDM in-band frequency hopping system based on partial bandwidth transmission;
FIG. 5 illustrates a wideband OFDM in-band and out-of-band joint frequency hopping system based on fractional bandwidth transmission;
FIG. 6 shows a flow diagram of a wideband OFDM in-band frequency hopping method based on partial bandwidth transmission;
fig. 7 shows a flow chart of a wideband OFDM in-band and out-of-band joint frequency hopping method based on partial bandwidth transmission.
Detailed Description
In view of the problems in the background art, the inventors of the present invention have studied, and propose a BWP-based in-band and out-of-band joint frequency hopping method and apparatus for a wideband OFDM system, such as a 5G/B5G mobile communication system supporting 400MHz or even wider system Bandwidth, which allows a terminal to operate only in a Part of the system Bandwidth by using a partial Bandwidth Part (BWP) transmission technique, and implement frequency hopping by jointly switching BWP and carrier center frequency point, so as to support the terminal to resist malicious interference and hostile interference, and have a certain adaptive wideband transmission capability.
The following first introduces a partial bandwidth transmission technique of the existing broadband OFDM system, and then introduces a frequency hopping method and apparatus using the partial bandwidth transmission technique of the present invention.
Broadband OFDM system using partial bandwidth transmission technique
The OFDM technology converts a high-speed serial data stream into a low-speed parallel data stream, then divides a carrier into a plurality of mutually orthogonal subcarriers, and transmits the data stream in parallel using the orthogonal subcarriers, so as to achieve higher spectral efficiency. The OFDM system architecture is shown in fig. 1.
At a transmitting end, a serial-to-parallel conversion module converts a modulated serial high-speed input signal into a low-speed parallel signal, an Inverse Fast Fourier Transform (IFFT) module modulates the low-speed parallel signal on orthogonal subcarriers, a parallel-to-serial conversion module converts the IFFT low-speed parallel signal into a high-speed serial signal, then inserts a Cyclic Prefix (CP) into an OFDM symbol to cope with inter-symbol interference, finally a Digital-to-Analog Converter (DAC) converts a Digital signal into an Analog signal, and an up-conversion module loads the Analog signal onto a specified frequency and then transmits the Analog signal through an antenna. And at the receiving end, completing the inverse process corresponding to the transmitting end and recovering the signal.
In some service scenarios, the required carrier bandwidth is small, and when the whole carrier bandwidth is used for transmission, the carrier bandwidth resources are wasted. The 5G uses a larger carrier bandwidth, which may be as high as 400MHz or wider, and the waste of bandwidth resources caused by using the entire carrier bandwidth for transmission is more obvious in some service scenarios. In contrast, the concept of partial bandwidth transmission is introduced in 5G, and both the transmitter and the receiver can use a part of the entire carrier bandwidth for transmission, as shown in fig. 2. Meanwhile, with the support of the adaptive Bandwidth Attachment (BA) technology, the Bandwidth size, the frequency resource location, and the subcarrier spacing of the BWP can be configured to flexibly adapt to the transmission rate requirement.
A broadband OFDM system using partial bandwidth transmission technology is shown in fig. 3, and the system introduces a BWP configuration module based on the OFDM system for selecting and configuring partial transmission bandwidth. Before the sending end performs OFDM modulation, a BWP configuration module located at a higher layer of the protocol determines bandwidth configuration, frequency resource location, subcarrier spacing, and the like of the BWP according to a transmission rate requirement, and transmits configuration Information to an OFDM modulation module through Downlink Control Information (DCI), and then the OFDM modulation module modulates an input signal to a designated BWP. At the receiving end, the same BWP configuration information as that at the transmitting end is also transmitted to the OFDM demodulation module through DCI, and the OFDM demodulation module recovers the signal at the designated BWP.
The broadband OFDM system adopting the partial bandwidth transmission technology can dynamically adjust the bandwidth resources occupied by transmission according to the service requirements, and avoids the waste of frequency spectrum resources while meeting the service transmission rate requirements.
Broadband OFDM in-band frequency hopping system adopting partial bandwidth transmission technology
In order to make the system have certain anti-interference capability to adapt to service scenes such as military communication and the like, the invention provides that an in-band frequency hopping technology is introduced into the system, and a broadband OFDM in-band frequency hopping system based on partial bandwidth transmission is designed, as shown in figure 4. Compared with a broadband OFDM frequency hopping system based on partial bandwidth transmission, the system additionally introduces a frequency hopping device for configuration of initial frequency hopping parameters, generation of a frequency hopping map, issuing of frequency hopping information and the like.
The frequency hopping device at the transmitting end consists of an in-band frequency hopping pseudo-random sequence generator 101, an in-band BWP frequency hopping pattern generator 102 and an in-band frequency hopping information interface 103. The in-band frequency hopping pseudo-random sequence generator can generate pseudo-random number sequences for generating an in-band BWP frequency hopping pattern; the in-band BWP frequency hopping map generator records available BWP resources in each carrier frequency band, and can generate an in-band BWP frequency hopping map reflecting the time variation rule of BWP by combining information such as an in-band frequency hopping pseudo-random sequence, a take-off moment, an in-band frequency hopping period and the like; and the in-band BWP configuration instruction is transmitted to the OFDM modulation module through an in-band frequency hopping information interface. The frequency hopping cycle is the duration of each hop of the frequency hopping mechanism, and comprises the sum of frequency changing time and frequency residence time.
The frequency hopping device at the receiving end consists of a frequency hopping initial configuration information synchronization module 201, an in-band frequency hopping pseudo-random sequence generator 202, an in-band BWP frequency hopping pattern generator 203, a frequency hopping information synchronization module 204 and an in-band frequency hopping information interface 205. Compared with the frequency hopping device at the sending end, the frequency hopping device at the receiving end is additionally provided with a frequency hopping initial configuration information synchronization module and a frequency hopping information synchronization module. The frequency hopping initial configuration information synchronization module is responsible for synchronizing the initial configuration information of the frequency hopping device of the receiving and transmitting end, so that the receiving and transmitting end can generate the same pseudo-random sequence, frequency hopping map and the like. The frequency hopping information synchronization module is responsible for the synchronous transmission of the frequency hopping information of the transmitting and receiving end, so that the transmitting and receiving end can transmit the same frequency hopping information to the OFDM and other modules of the physical layer at the same time.
Broadband OFDM in-band and out-band frequency hopping system
Based on the above in-band frequency hopping system, according to an embodiment of the present invention, a joint in-band and out-of-band frequency hopping technique is proposed, as shown in fig. 5. Compared to the in-band frequency hopping system, the system additionally introduces a module for out-of-band frequency hopping, a module for frequency hopping mode, and the like.
The frequency hopping device at the transmitting end consists of an in-band frequency hopping pseudo-random sequence generator 101, an in-band BWP frequency hopping pattern generator 102, an in-band frequency hopping information interface 103, an out-of-band frequency hopping pseudo-random sequence generator 104, an out-of-band frequency hopping pattern generator 105, an out-of-band frequency hopping information interface 106 and an interference sensing and frequency hopping mode selection module 107. The in-band frequency hopping pseudo-random sequence generator and the out-of-band frequency hopping pseudo-random sequence generator can generate pseudo-random number sequences independently and are respectively used for generating an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern; the out-of-band frequency hopping map generator records available carrier resources, and can generate an out-of-band frequency hopping map reflecting the time variation rule of the central frequency point of the carrier in combination with information such as an out-of-band frequency hopping pseudo-random sequence, a take-off moment, an out-of-band frequency hopping cycle and the like; the interference sensing and frequency hopping mode selection module can sense the interference severity degree in the current frequency hopping carrier frequency band in real time, comprehensively considers the interference severity degree and the out-of-band frequency hopping overhead and selects a proper frequency hopping mode; after the frequency hopping mode is determined, the corresponding in-band BWP configuration instruction and out-of-band frequency hopping configuration instruction are respectively transmitted to the OFDM modulation module and the up-conversion module through the in-band frequency hopping information interface and the out-of-band frequency hopping information interface.
The frequency hopping device at the receiving end consists of a frequency hopping initial configuration information synchronization module 201, an in-band frequency hopping pseudo-random sequence generator 202, an in-band BWP frequency hopping pattern generator 203, a frequency hopping information synchronization module (204), an in-band frequency hopping information interface 205, an out-band frequency hopping pseudo-random sequence generator 206, an out-band frequency hopping pattern generator 207, a frequency hopping mode synchronization module 208 and an out-band frequency hopping information interface 209. Compared with the frequency hopping device at the sending end, the frequency hopping device at the receiving end does not have an interference sensing and frequency hopping mode selecting module, but is additionally provided with a frequency hopping initial configuration information synchronizing module, a frequency hopping mode synchronizing module and a frequency hopping information synchronizing module. The frequency hopping initial configuration information synchronization module is responsible for synchronizing the initial configuration information of the frequency hopping device of the receiving and transmitting end, so that the receiving and transmitting end can generate the same pseudo-random sequence, frequency hopping map and the like. The frequency hopping mode synchronization module is responsible for synchronization of frequency hopping modes of the receiving and transmitting ends, the frequency hopping modes of the receiving and transmitting ends are kept consistent in real time, and the frequency hopping information synchronization module is responsible for synchronous transmission of frequency hopping information of the receiving and transmitting ends, so that the receiving and transmitting ends can transmit the same frequency hopping information to OFDM modules, frequency conversion modules and other modules of a physical layer at the same time.
In-band frequency hopping procedure
According to an embodiment of the present invention, an implementation procedure of an in-band frequency hopping mechanism of a broadband OFDM frequency hopping system based on partial bandwidth transmission is shown in fig. 6.
Step 110: and synchronizing the initial configuration information of the frequency hopping device at the transmitting and receiving ends. The transmitting end transmits initial configuration information of the frequency hopping device such as initial state information of an in-band pseudo-random sequence generator, frequency hopping starting time, an in-band BWP frequency hopping cycle and the like to the receiving end, and the transmitting and receiving end adopts the same frequency hopping initial configuration information to configure the frequency hopping device.
Step 120: and generating a pseudo-random sequence at a transmitting end and a receiving end. The sending end configures the in-band pseudo-random sequence generator according to the initial state information, and the pseudo-random sequence generated by the in-band pseudo-random sequence generator is used for generating an in-band BWP frequency hopping map. The receiving end and the transmitting end perform the same operation, and the receiving end and the transmitting end configure the pseudo-random sequence generator by using the same initial state information, so the pseudo-random sequences generated by the receiving end and the transmitting end are also the same.
Step 130: and generating a frequency hopping map of the transmitting and receiving ends. An in-band BWP frequency hopping map generator of a transmitting end firstly maps an in-band frequency hopping pseudo-random sequence into a change rule of the in-band BWP, and then maps the change rule of the in-band BWP into a rule of the in-band BWP changing along with time by combining the take-off moment and the in-band BWP frequency hopping period, wherein the rule of the in-band BWP changing along with time is the in-band BWP frequency hopping map. The receiving end and the transmitting end perform the same operation to generate the same in-band BWP frequency hopping pattern as the transmitting end.
Step 140: and synchronously transmitting frequency hopping information of the transmitting and receiving ends. And the frequency hopping device positioned at the high-level protocol of the transceiving end synchronously transmits the frequency hopping information to the physical layer through the interface of the frequency hopping map according to the frequency hopping map. A frequency hopping device of a sending end transmits a BWP configuration instruction based on BWP frequency hopping information to an OFDM modulation module through an in-band map interface; the frequency hopping device of the receiving end synchronously transmits the BWP configuration instruction same as that of the transmitting end to the OFDM demodulation module through the in-band map interface.
In-band and out-of-band joint frequency hopping process
According to an embodiment of the present invention, an implementation procedure of an in-band and out-of-band joint frequency hopping mechanism of a wideband OFDM frequency hopping system based on partial bandwidth transmission is shown in fig. 7.
Step 210: and synchronizing the initial configuration information of the frequency hopping device at the transmitting and receiving ends. The transmitting end transmits initial configuration information of the frequency hopping devices such as initial state information, frequency hopping starting time, in-band BWP frequency hopping cycle, out-of-band frequency hopping cycle and the like of the two pseudo-random sequence generators to the receiving end, and the transmitting and receiving end configures the frequency hopping devices by adopting the same frequency hopping initial configuration information.
Step 220: and generating and transmitting a pseudo-random sequence at a transmitting end and a receiving end. The sending end configures the pseudo-random sequence generator of the receiving and sending end according to the initial state information, and the pseudo-random sequence generator of the receiving and sending end generates two rows of mutually independent pseudo-random sequences with different periods, which are respectively used for generating an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern. The receiving end and the transmitting end perform the same operation, and the receiving end and the transmitting end configure the pseudo-random sequence generator by using the same initial state information, so the pseudo-random sequences generated by the receiving end and the transmitting end are also the same.
Step 230: and generating a frequency hopping map of the transmitting and receiving end. An in-band BWP frequency hopping map generator of a transmitting end firstly maps an in-band frequency hopping pseudo-random sequence into a change rule of the in-band BWP, and then maps the change rule of the in-band BWP into a rule of the in-band BWP changing along with time by combining the take-off moment and the in-band BWP frequency hopping period, wherein the rule of the in-band BWP changing along with time is the in-band BWP frequency hopping map. An out-of-band frequency hopping map generator of a sending end firstly maps out-of-band frequency hopping pseudo-random sequences to change rules of carrier central frequency points, and then maps the change rules of the carrier central frequency points to the rules of the carrier central frequency points changing along with time by combining take-off time and an out-of-band frequency hopping period, wherein the rules of the carrier central frequency points changing along with time are the out-of-band frequency hopping map. The receiving end and the transmitting end perform the same operation to generate an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern which are the same as those of the transmitting end.
Step 240: and the sending end selects a frequency hopping mode based on interference real-time perception. In the frequency hopping process, the sending end senses the interference severity degree in the current frequency hopping carrier frequency band in real time, and selects a proper frequency hopping mode or a combination of the frequency hopping modes according to the interference severity degree. For example, if the interference severity in the current frequency hopping carrier frequency band is low, BWP switching is adopted, and the frequency hopping mode of the carrier center frequency point is not switched, that is, only the in-band frequency hopping mode is adopted; if the interference severity in the frequency band of the current frequency hopping carrier is higher, the frequency hopping mode of switching both BWP and carrier center frequency points is adopted, namely, an in-band frequency hopping mode and an out-of-band frequency hopping mode are adopted at the same time.
Step 250: and the frequency hopping modes of the transmitting and receiving ends are synchronous. And the sending end sends the frequency hopping mode to the receiving end, and the sending end and the receiving end adopt the same frequency hopping mode to carry out communication.
Step 260: and synchronously transmitting frequency hopping information of the transmitting and receiving ends. And the frequency hopping device positioned at the high-level protocol of the transceiving end synchronously transmits the frequency hopping information to the physical layer through the interface of the frequency hopping map according to the frequency hopping map and the frequency hopping mode. A frequency hopping device at a sending end transmits a BWP configuration instruction based on BWP frequency hopping information to an OFDM modulation module through an in-band map interface, and/or transmits a frequency hopping carrier central frequency point configuration instruction to an up-conversion module through an out-of-band map interface; the frequency hopping device of the receiving end transmits a BWP configuration instruction which is the same as that of the transmitting end to the OFDM demodulation module synchronously through the in-band map interface, and/or transmits a frequency hopping carrier central frequency point configuration instruction which is the same as that of the transmitting end to the down-conversion module synchronously through the out-of-band map interface.
Step 270: steps 240, 250, 260 are performed cyclically.
In a specific embodiment, an m-sequence may be used as the pseudo-random sequence, where the m-sequence is a pseudo-random sequence with a period of 2n-1 generated by the n-stage linear shift register, and the frequency hopping apparatus may respectively transmit the in-band hopping m-sequence and the out-of-band hopping m-sequence to the in-band BWP frequency hopping pattern generator and the out-of-band frequency hopping pattern generator for generating the in-band BWP frequency hopping pattern and the out-of-band frequency hopping pattern.
The previous description is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Moreover, all or a portion of any aspect and/or embodiment may be utilized with all or a portion of any other aspect and/or embodiment, unless stated otherwise. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A frequency hopping method for a wideband OFDM system, comprising:
step 110: the sending end sends the initial configuration information to the receiving end;
step 120: the sending end and the receiving end generate the same pseudo-random sequence according to the initial configuration information;
step 130: the sending end and the receiving end generate the same frequency hopping map of the in-band BWP according to the same pseudo-random sequence;
step 140: and according to the same in-band BWP frequency hopping map, the sending end transmits an in-band BWP configuration instruction to the OFDM modulation module, and the receiving end transmits the same BWP configuration instruction as the sending end to the OFDM demodulation module.
2. The method of claim 1, wherein the initial configuration information in step 110 comprises initial state information of a pseudo-random sequencer, a hop-start time, and an in-band BWP hop period.
3. A frequency hopping method for a wideband OFDM system, comprising:
step 210: the sending end sends the initial configuration information to the receiving end;
step 220: the sending end generates two lines of pseudorandom sequences which are independent from each other and have different periods according to the initial configuration information, and the receiving end generates two lines of pseudorandom sequences which are the same as the sending end according to the initial state information;
step 230: the sending end and the receiving end respectively generate the same in-band BWP frequency hopping map and the same out-of-band frequency hopping map according to the two same pseudorandom sequences;
step 240: in the frequency hopping process, a sending end senses the interference severity degree in the frequency band of the current frequency hopping carrier in real time, and an in-band frequency hopping mode and/or an out-of-band frequency hopping mode are/is predicted to be selected according to the interference severity degree;
step 250: the sending end sends the frequency hopping mode to the receiving end, and the sending end and the receiving end adopt the same frequency hopping mode to carry out communication;
step 260: according to the same in-band BWP frequency hopping map, the sending end transmits an in-band BWP configuration instruction to the OFDM modulation module, and the receiving end transmits the same BWP configuration instruction as the sending end to the OFDM demodulation module and/or
And according to the same in-band BWP frequency hopping map, the sending end transmits the out-of-band frequency hopping carrier central frequency point configuration instruction to the up-conversion module, and the receiving end transmits the same frequency hopping carrier central frequency point configuration instruction as the sending end to the down-conversion module.
4. The method of claim 3, further comprising:
step 270: steps 240, 250, 260 are performed cyclically.
5. A frequency hopping device for a transmitting end of wireless communication comprises an in-band frequency hopping pseudo-random sequence generator, an in-band BWP frequency hopping pattern generator, an in-band frequency hopping information interface,
the in-band frequency hopping pseudo-random sequence generator is used for generating pseudo-random number sequences for generating an in-band BWP frequency hopping pattern; the in-band BWP frequency hopping map generator is used for recording the available BWP resources in each carrier frequency band and generating an in-band BWP frequency hopping map; the in-band frequency hopping information interface is used for transmitting the in-band BWP configuration instruction to the OFDM modulation module.
6. The frequency hopping apparatus of claim 5, further comprising an out-of-band hopping pseudo-random sequence generator, an out-of-band hopping pattern generator, an out-of-band hopping information interface, an interference sensing and hopping pattern selection module,
the in-band frequency hopping pseudo-random sequence generator and the out-of-band frequency hopping pseudo-random sequence generator are mutually independent to generate pseudo-random number sequences and are respectively used for generating an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern; the out-of-band frequency hopping pattern generator is used for recording available carrier resources and generating an out-of-band frequency hopping pattern; the out-of-band frequency hopping information interface is used for transmitting an out-of-band frequency hopping configuration instruction to the up-conversion module; the interference sensing and frequency hopping mode selection module is used for sensing the interference severity degree in the current frequency hopping carrier frequency band in real time and selecting a proper frequency hopping mode or a frequency hopping mode combination.
7. A frequency hopping device used for a receiving end of wireless communication comprises a frequency hopping initial configuration information synchronization module, an in-band frequency hopping pseudo random sequence generator, an in-band BWP frequency hopping pattern generator, an in-band frequency hopping information interface and a frequency hopping information synchronization module,
the frequency hopping initial configuration information synchronization module is used for synchronizing the initial configuration information of the frequency hopping device at the receiving and transmitting end; the in-band frequency hopping pseudo-random sequence generator is used for generating pseudo-random number sequences for generating an in-band BWP frequency hopping pattern; the in-band BWP frequency hopping map generator is used for recording the available BWP resources in each carrier frequency band and generating an in-band BWP frequency hopping map; the in-band frequency hopping information interface is used for transmitting the in-band BWP configuration instruction to the OFDM modulation module; the frequency hopping information synchronization module is used for synchronously transmitting the frequency hopping information of the transmitting and receiving ends.
8. The frequency hopping apparatus of claim 7, further comprising an out-of-band hopping pseudo-random sequence generator, an out-of-band hopping pattern generator, a hopping pattern synchronization module, and an out-of-band hopping information interface,
the in-band frequency hopping pseudo-random sequence generator and the out-of-band frequency hopping pseudo-random sequence generator are mutually independent to generate pseudo-random number sequences and are respectively used for generating an in-band BWP frequency hopping pattern and an out-of-band frequency hopping pattern; the out-of-band frequency hopping pattern generator is used for recording available carrier resources and generating an out-of-band frequency hopping pattern; the out-of-band frequency hopping information interface is used for transmitting the out-of-band frequency hopping configuration instruction to the down-conversion module; the frequency hopping mode synchronization module is used for synchronizing the frequency hopping modes of the transmitting end and the receiving end.
9. A computer-readable storage medium, in which one or more computer programs are stored, which when executed, are for implementing the method of any one of claims 1-4.
10. A computing system, comprising:
a storage device, and one or more processors;
wherein the storage means is for storing one or more computer programs which, when executed by the processor, are for implementing the method of any one of claims 1-4.
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