CN107592668B

CN107592668B - Method and device for transmitting signals

Info

Publication number: CN107592668B
Application number: CN201610539243.1A
Authority: CN
Inventors: 刘瑾; 凯文·卡·勤·欧; 葛士斌; 蒋鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-07-07
Filing date: 2016-07-07
Publication date: 2021-01-12
Anticipated expiration: 2036-07-07
Also published as: WO2018006741A1; CN107592668A

Abstract

The invention discloses a method and a device for transmitting signals. The method comprises the following steps: generating a first signal, wherein the first signal comprises N signal sequences, at least two of the N signal sequences are different, N is a positive integer greater than or equal to 2, and the first signal is used for the terminal equipment to perform time synchronization only according to the first signal; the first signal is transmitted. The method and the device for transmitting the signals can reduce resource overhead.

Description

Method and device for transmitting signals

Technical Field

The present invention relates to the field, and more particularly, to a method and apparatus for transmitting a signal.

Background

Long Term Evolution (LTE), as a communication system proposed by the 3rd Generation Partnership Project (3 GPP) organization and leading to the Fourth Generation (4G) communication system, adopts various new technologies, such as Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), link adaptation, etc., and aims to improve data transmission rate, reduce system delay, increase system capacity and coverage, and reduce operation cost.

Cell search and synchronization are very critical steps in the LTE system, and are a precondition for establishing a communication link between a terminal and a base station. No matter the terminal is initially powered on in the serving cell or performs cell handover in the communication process, it is necessary to establish connection with the base station through the cell search and synchronization process. The cell search process is mainly to make the terminal and the cell obtain time synchronization and frequency synchronization, and obtain cell Identity (ID), system bandwidth and other cell broadcast information.

Before the LTE terminal can communicate with the LTE network, it is necessary to first find and synchronize with a cell in the network, and then receive and decode information necessary for communication and normal operation with the cell, so that it is possible to access the cell in a subsequent random access process. And in order to support mobility, the terminal needs to continuously search for signals of neighboring cells and evaluate the quality of the signals to determine whether handover needs to be performed. Whether the cell search, synchronization and switching are successful or not directly determines the perception of the user, and the success rate and the reliability of the cell search, synchronization and switching are important consideration indexes of the mobility management performance of the LTE system.

In the field of wireless communication, high-density networks and nearby communications based on densely deployed network transmission and Reception nodes (TRPs) are receiving increasing attention. Network densification causes the terminal to be under multiple TRP coverage, which complicates the access, synchronization and handover procedures of the terminal. The existing terminal and TRP access, synchronization and switching schemes have large resource overhead. For the requirements of compact network structure and harsh system performance, a transparent TRP service needs to be dynamically provided for each terminal, and the existing way of connecting terminals with fixed TRPs cannot meet the requirements. Therefore, in order to truly realize the terminal-Centric experience, a User Centric No Cell Radio Access (UCNC) technology is required, that is, the terminal does not Access a fixed physical TRP any more, but accesses a logical entity containing a set of TRPs to obtain service, and such a logical entity may be called a super Cell (supercell). The border of the supercell is flexible and can be changed according to the change of network load and user distribution. All TRPs in the Hypercell are transparent to the terminal, and the terminal can obtain the services of the TRPs in the Hypercell only by accessing according to the Hypercell ID, and is not fixedly connected with a certain TRP.

For a high-density network, if the existing cell search and synchronization scheme is adopted, the cell search and synchronization of the terminal become very complicated, and each calculation and selection requires corresponding signaling overhead, so that the performance requirement under the high-density network cannot be met.

Therefore, reducing the resource overhead becomes a technical problem to be solved urgently in the high-density network.

Disclosure of Invention

The embodiment of the invention provides a method and a device for transmitting signals, which can reduce resource overhead.

In a first aspect, a method for transmitting a signal is provided, including:

generating a first signal, wherein the first signal comprises N signal sequences, at least two of the N signal sequences are different, N is a positive integer greater than or equal to 2, and the first signal is used for the terminal equipment to perform time synchronization only according to the first signal;

the first signal is transmitted.

In the embodiment of the present invention, the first signal includes a plurality of signal sequences, at least two of which are different from each other, and are different from the existing PSS using the same signal sequence, so that the terminal device can implement time synchronization by detecting different signal sequences of the first signal. That is, only one signal is needed to achieve synchronization after the first signal of the embodiment of the present invention is used. Therefore, the embodiment of the invention can simplify the synchronization process, thereby reducing the resource overhead.

In some possible implementations, the N signal sequences are transmitted in different N time units that are separated by one or more predetermined offset values.

In some possible implementations, N is 2, the N signal sequences are a first signal sequence and a second signal sequence, and the first signal sequence and the second signal sequence are conjugate to each other.

Under the condition that the first signal adopts two signal sequences which are conjugate to each other, the receiver is simple, the received signal can be detected only by correlating with one known sequence, and the received signal does not need to be detected by respectively correlating with the two known sequences.

In some possible implementations, transmitting the first signal includes:

the first signal sequence is transmitted within a first time unit and the second signal sequence is transmitted within a second time unit, the first time unit being separated from the second time unit by one or more predetermined offset values.

In some possible implementations, the first time unit is a first subframe of a radio frame, the second time unit is a second subframe of the radio frame, and the first subframe and the second subframe are separated by half a radio frame.

In some possible implementations, the first subframe is subframe No. 0 of a radio frame, and the second subframe is subframe No. 5 of the radio frame.

In some possible implementations, the N signal sequences are ZC sequences.

In some possible implementations, the method further includes:

generating a second signal, wherein the second signal is used for identifying the area identification;

the second signal is transmitted.

According to the embodiment of the invention, the second signal for identifying the area identifier is transmitted, so that the identification process can be simplified, and the resource overhead can be reduced.

In some possible implementations, the second signal includes a third signal sequence or a fourth signal sequence, the third signal sequence and the fourth signal sequence being formed by interleaving the first m-sequence and the second m-sequence according to different interleaving orders.

In some possible implementations, the first m-sequence and the second m-sequence are both 31 long.

In some possible implementations, the interleaving order is used to identify the transmission unit structure type.

In some possible implementations, the time-domain transmission locations of the second signal are the same for different transmission unit structure types.

In some possible implementations, transmitting the second signal includes:

the second signal is transmitted on a first subband of the plurality of subbands when the frequency resources of the region include the plurality of subbands.

In some possible implementations, transmitting the second signal includes:

and when the area is a high-low frequency mixed networking area, transmitting the second signal in a low-frequency band of the area.

In some possible implementations, transmitting the second signal includes:

the second signal is transmitted by a partial transmit-receive node TRP of the area.

In some possible implementations, transmitting the first signal includes:

the first signal is transmitted on each of a plurality of subbands when frequency resources of a region include the plurality of subbands.

In some possible implementations, transmitting the first signal includes:

and when the area is a high-low frequency hybrid networking area, transmitting the first signal in a low frequency band and a high frequency band of the area.

In some possible implementations, transmitting the first signal includes:

in the high frequency band of the area, the same first signal is transmitted through different beams, wherein the offsets between signal sequences in the first signals transmitted by the different beams are different, and the offsets are used for identifying the beams; alternatively, the first and second electrodes may be,

in the high frequency band of the area, different first signals are transmitted through different beams, the first signals being used to identify the beams.

In some possible implementations, transmitting the first signal includes:

the first signal is transmitted through all TRPs of the region.

In some possible implementations, the time-domain transmission position of the first signal is different for different transmission unit structure types, and the time-domain transmission position of the first signal is used for identifying the transmission unit structure type.

In a second aspect, a method of transmitting a signal is provided, including:

transmitting a first signal on each of a plurality of subbands of a frequency resource of a region, the first signal being for time synchronization by a terminal device;

a second signal is transmitted on a first subband of the plurality of subbands, the second signal identifying a region identification for the region.

The embodiment of the invention only sends the second signal for identifying the area identifier on the first sub-band, and does not need to send the second signal on each sub-band, thereby reducing the resource overhead.

In some possible implementations, the number of the first sub-band is greater than or equal to 1 and less than the number of the plurality of sub-bands.

In a third aspect, a method for transmitting signals is provided, including:

sending a first signal in a low frequency band of a high-low frequency hybrid networking area, wherein the first signal is used for a terminal device to perform time synchronization in the low frequency band of the area, and sending a third signal in a high frequency band of the area, wherein the third signal is used for the terminal device to perform time synchronization in the high frequency band of the area;

and transmitting a second signal in a low frequency band of the area, wherein the second signal is used for identifying the area identification of the area.

The embodiment of the invention only transmits the second signal for identifying the area identifier in the low frequency band and does not transmit the second signal in the high frequency band, thereby reducing the resource overhead.

In some possible implementations, the first signal and the third signal are the same.

In some possible implementations, the third signal is a primary synchronization signal PSS in a long term evolution, LTE, system.

In some possible implementations, the transmitting the third signal in the high frequency band of the region includes:

and transmitting the same third signal through different beams in a high frequency band of the area, wherein the offset between signal sequences in the third signals transmitted by different beams is different, and the offset is used for identifying the beams.

in the high frequency band of the region, different ones of the first signals are transmitted via different beams, and the third signals are used to identify the beams.

In some possible implementations, the time-domain transmission position of the third signal is different for different transmission unit structure types, and the time-domain transmission position of the third signal is used for identifying the transmission unit structure type.

In a fourth aspect, a method of transmitting a signal is provided, comprising:

receiving a first signal, wherein the first signal comprises N signal sequences, at least two of the N signal sequences are different, and N is a positive integer greater than or equal to 2;

time synchronization is performed according to the first signal.

After the first signal of the embodiment of the invention is adopted, only one signal is needed to realize synchronization. Therefore, the embodiment of the invention can simplify the synchronization process, thereby reducing the resource overhead.

In some possible implementations, time synchronizing according to the first signal includes:

determining a field timing and a frame timing based on the first signal sequence and the second signal sequence.

In some possible implementations, the N signal sequences are ZC sequences.

In some possible implementations, the method further includes:

receiving a second signal, wherein the second signal is used for identifying the area identification;

and performing region identification according to the second signal.

In some possible implementations, the method further includes:

and identifying the transmission unit structure type according to the staggered sequence of the third signal sequence or the fourth signal sequence.

In some possible implementations, receiving the second signal includes:

the second signal is received on a first subband of the plurality of subbands when the frequency resources of the region include the plurality of subbands.

In some possible implementations, receiving the second signal includes:

when the area is a high-low frequency hybrid networking area, the second signal is received in a low frequency band of the area.

In some possible implementations, receiving the first signal includes:

the first signal is received on each of a plurality of subbands when frequency resources of a region include the plurality of subbands.

In some possible implementations, receiving the first signal includes:

and when the area is a high-low frequency hybrid networking area, receiving the first signal in a low frequency band and a high frequency band of the area.

In some possible implementations, the method further includes:

and identifying the structure type of the transmission unit according to the time domain sending position of the first signal.

In a fifth aspect, a method for transmitting a signal is provided, including:

receiving a first signal on each of a plurality of subbands of frequency resources of a region;

performing time synchronization according to the first signal;

receiving a second signal on a first subband of the plurality of subbands;

and identifying the area identification of the area according to the second signal.

The embodiment of the invention does not transmit the second signal for identifying the area identifier on each subband, thereby reducing the resource overhead.

In some possible implementations, the method further includes:

In a sixth aspect, a method of transmitting a signal is provided, comprising:

receiving a first signal in a low-frequency band of a high-frequency and low-frequency hybrid networking area;

performing time synchronization in a low frequency band of the region according to the first signal;

receiving a third signal at a high frequency band of the region;

performing time synchronization in a high frequency band of the region according to the third signal;

receiving a second signal in a low frequency band of the region;

According to the embodiment of the invention, the second signal for identifying the area identifier is transmitted only in the low frequency band, and the second signal is not transmitted in the high frequency band, so that the resource overhead can be reduced.

In some possible implementations, the method further includes:

and identifying the high-frequency band beams of the area according to the offset between the signal sequences in the third signal.

In some possible implementations, the method further includes:

and identifying the high-frequency band beam of the area according to the third signal.

In some possible implementations, the method further includes:

and identifying the structure type of the transmission unit according to the time domain sending position of the third signal.

In a seventh aspect, an apparatus for transmitting signals is provided, which includes a processor and a transceiver, and may perform the method in the first to the third aspects or any possible implementation manner thereof.

In an eighth aspect, there is provided an apparatus for transmitting signals, comprising a processor and a transceiver, which may perform the method of the fourth to sixth aspects or any possible implementation manner thereof.

In a ninth aspect, a computer storage medium is provided, in which program code is stored, and the program code can be used for instructing to execute the method in the first to sixth aspects or any possible implementation manner thereof.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a scenario in which embodiments of the present invention may be applied.

Fig. 2 is a schematic diagram of a cell search and synchronization scheme for a 4G system.

Fig. 3 is a schematic diagram of location allocation patterns of the PSS and the SSS in different duplex modes of the 4G system.

Fig. 4 is a schematic flow chart of a method of transmitting a signal in accordance with one embodiment of the present invention.

Fig. 5 is a schematic flow chart of a method of transmitting a signal according to another embodiment of the present invention.

Fig. 6a and 6b are schematic diagrams of m-sequence interleaving of an embodiment of the present invention.

Fig. 7a and 7b are schematic diagrams of a first signal and a second signal of an embodiment of the present invention.

Fig. 8 is a schematic flow chart of a method of transmitting a signal according to yet another embodiment of the present invention.

Fig. 9 is a diagram illustrating signals transmitted in the hybrid Numerology mode according to an embodiment of the invention.

Fig. 10 is a schematic flow chart of a method of transmitting a signal according to yet another embodiment of the present invention.

Fig. 11a and 11b are schematic diagrams of signals transmitted in a high frequency band according to an embodiment of the present invention.

Fig. 12 is a schematic diagram of transmission signals in a high-low frequency hybrid networking region according to an embodiment of the invention.

Fig. 13 is a schematic block diagram of an apparatus for transmitting signals according to an embodiment of the present invention.

Fig. 14 is a schematic block diagram of an apparatus for transmitting a signal according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Fig. 1 shows a schematic diagram of a scenario in which an embodiment of the invention is applied. As shown in fig. 1, a plurality of TRPs 101-105 form a region, which may be a physical region or a virtual region. For convenience of description, the regions are taken as examples in the embodiments of the present invention for illustration. This area may be referred to as Hypercell or other name. The region may comprise one or more TRPs, optionally may be invariant or may comprise one or more TRPs; variable to contain one or more TRPs may refer to different numbers of TRPs contained in different time periods, such as a region may contain 2 TRPs in one time period and 3 TRPs in another time period; become inclusive of one or more TRPs, which may refer to terminal device based, such as three TRPs with assumed

sequence numbers

1,2,3 for terminal device #1 and two TRPs with assumed

sequence numbers

3,4 for terminal device # 2; of course, for the design of the regions of different time periods or the design of the region based on the terminal device, the TRPs contained in the regions may or may not overlap. A region may also be a region containing one or more functional entities, optionally a region that may or may not become containing one or more functional entities; variable to include one or more functional entities may refer to different numbers of functional entities included in different time periods, such as an area may include 2 functional entities in one time period and 3 functional entities in another time period; may become comprised of one or more functional entities, may refer to terminal device based, such as three functional entities with assumed

sequence numbers

1,2,3 for terminal device #1 and two functional entities with assumed

sequence numbers

3,4 for terminal device # 2; of course, for the design of the areas in different time periods or the design of the area based on the terminal device, the functional entities included in the areas may or may not overlap. This area has an area identifier, which may be, but not limited to, referred to as a cell identifier or a cell ID or an identifier parameter or ID, such as a modified connection identifier (DCS), where US publication No. US2014/0073287 of DCS is introduced, and the patent content of "System and Method For UE center Unified System Access in Virtual Radio Access Network" may also be considered as part of the present application. The terminal device 111 only needs to access according to the area identifier to obtain the TRP service in the supercell without being fixedly connected with a certain TRP. Of course, the embodiment of the present invention may also be used in other different scenarios, for example, the terminal device may also be fixedly connected to one or more TRPs, which is not limited in this respect. The concept of zones can be varied as described above, for example, U.S. publication No. US2014/0113643, entitled "System and Method for Radio Access visualization" can also be considered as part of the present disclosure, and U.S. publication No. US2015/0141002, entitled "Systems and Methods for Non-cellular Wireless Access" can also be considered as part of the present disclosure.

It should be understood that fig. 1 is a simplified schematic diagram by way of example only, and that more TRPs or other network devices, not shown in fig. 1, may also be included.

Various embodiments are described herein in connection with a terminal device. A terminal device may also refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, etc.

Various embodiments are described herein in connection with TRPs. The TRP may be a Network device for communicating with a terminal device, where the Network device may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA system, an evolved Node B (eNB or eNodeB) in LTE system, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or a relay Station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a future 5G Network, or a Network device in a future evolved PLMN Network, and the like.

As shown in fig. 2, two special symbols, Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS), are transmitted on each downlink component carrier in the cell search and Synchronization scheme of the existing 4G system. The PSS has three different signal sequences, corresponding to three cell IDs in a set of cell ID groups. The two PSS's transmitted within one radio frame are identical, which allows the terminal device to obtain the slot timing. The SSS corresponds to one of 168 groups of cell ID groups and is generated by two m sequences with the length of 31, effective values of two SSSs transmitted in one radio frame are different from each other, and frame timing can be obtained through detection of a single SSS, so that synchronization is obtained. The frame positions of PSS and SSS are used to distinguish duplex mode. For example, fig. 3 shows a frame position allocation pattern of the PSS and the SSS in a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode of the existing 4G system. In FDD mode, PSS is transmitted on 0 th and 5 th subframes, SSS is located on the first symbol before PSS. In TDD mode, PSS is transmitted on 1 st and 6 th subframes, SSS is located on the third symbol before PSS. In the existing 4G system, the PSS and SSS are generally transmitted only on subcarriers near the center frequency of the system, i.e., the PSS and SSS transmission frequency range need not occupy the entire bandwidth.

In the embodiment of the invention, the synchronization and the area identification functions are decoupled, a new design scheme of a synchronization signal can be provided, the time synchronization of the terminal equipment can only use the first signal, the area identification can only use the second signal, the cell search and the synchronization can be separately and independently carried out, the cell search and the synchronization process are simplified, and the resource overhead is effectively reduced. In addition, for different transmission unit structure types (such as different duplex modes), the first signal and the second signal may both adopt only one structure (for example, the transmission position of the first signal in two duplex modes is the same, and the transmission position of the second signal in two duplex modes is the same), and the transmission unit structure type identification is performed through the second signal.

It should be understood that in various embodiments of the present invention, the names of the "first signal" and the "second signal" may follow the names of the existing synchronization signals, that is, the first signal may be PSS and the second signal may be SSS, or other names may be adopted, which is not limited in the present invention. In addition, other processing based on synchronization signals, such as frequency synchronization, not referred to herein, may be followed or referred to in the art.

In the embodiment of the present invention, the transmission unit structure type may be, for example, a frame structure type, different transmission unit structure types may be used for different duplex modes, and the transmission unit structure type may further indicate a duplex mode, such as TDD or FDD.

In the embodiment of the present invention, the Transmission unit may represent, but is not limited to, a Time unit, and the Time unit may represent a Time domain resource of a Transmission signal, and they may follow the name or meaning of terms such as an existing radio frame or frame, a subframe, a slot, a Transmission Time Interval (TTI), an OFDM symbol, and the like, and may also represent the meaning in a future communication system. In addition, the present invention does not limit the names of the terms, that is, the terms may be used in a future communication system.

Taking a subframe as an example, in a future communication system, the meaning of the subframe may change. For example, the subframe is not limited to 1ms, and may have other subframe lengths or a dynamic subframe length, and the time length of the subframe may vary according to the subcarrier spacing. The name of the subframe may also be changed, and if the name of the subframe is changed, the subframe in the embodiment of the present invention may be converted into a corresponding name in a future communication system. In the description herein, for the sake of brevity, reference is made to the present general description as an example.

Fig. 4 shows a schematic flow diagram of a method of transmitting a signal according to an embodiment of the invention. The TRP in figure 4 can be the TRP in TRP 101-105 in figure 1; the terminal device may be terminal device 111 in fig. 1. Of course, in an actual system, the number of TRPs and terminal devices may not be limited to the example of this embodiment or other embodiments, and will not be described again.

410, the TRP generates a first signal, wherein the first signal includes N signal sequences, at least two of the N signal sequences are different, N is a positive integer greater than or equal to 2, and the first signal is used for the terminal device to perform time synchronization only according to the first signal.

In the embodiment of the present invention, the first signal includes a plurality of signal sequences, at least two of which are different from each other, and are different from the existing PSS using the same signal sequence, so that the terminal device can achieve time synchronization, such as slot timing, frame timing, or transmission unit timing, by detecting different signal sequences of the first signal.

Optionally, N is 2, the N signal sequences are a first signal sequence and a second signal sequence, and the first signal sequence and the second signal sequence are conjugate to each other. That is, in this case, the first signal includes two signal sequences conjugate to each other, i.e., a first signal sequence and a second signal sequence.

Under the condition that the first signal adopts two signal sequences which are conjugate with each other, the receiver is simpler, the received synchronous signal can be detected only by correlating with one known sequence, and the received synchronous signal does not need to be detected by respectively correlating with the two known sequences.

Specifically, the first signal may adopt Zadoff-chu (ZC) sequence, i.e. the N signal sequences are ZC sequences. Alternatively, the first signal sequence and the second signal sequence may be ZC sequences conjugate to each other.

For example, the sequence for the first signal may be generated according to equation (1) below:

wherein u is a root index of the ZC sequence. u may be a positive integer or a negative integer. When the first signal includes N signal sequences, u corresponding to the N signal sequences may all be positive integers or negative integers. Optionally, the first signal sequence and the second signal sequence may be obtained by selecting two different root indices u, and further, the first signal sequence and the second signal sequence may be obtained by selecting two special root indices u that are conjugate to each other. For example, the root index u of the first signal sequence₁Which may be 29, root index u of the second signal sequence₂May be 34.

420, the TRP transmits the first signal.

The terminal device has a corresponding receiving action, and in the embodiment of the present application, the receiving action of the corresponding receiving end belongs to the protection scope of the present invention, and is not described in detail.

Specifically, the N signal sequences of the first signal are transmitted in different N time units, which are separated by one or more predetermined offset values, i.e., each signal sequence is transmitted in one time unit, which is separated by one or more predetermined offset values. For example, where N is 2, 2 signals are transmitted within 2 time units, respectively, the 2 time units being separated by one or more predetermined offset values.

Optionally, when the first signal includes a first signal sequence and a second signal sequence, the TRP may transmit the first signal sequence in a first time unit and the second signal sequence in a second time unit, the first time unit being separated from the second time unit by one or more predetermined offset values.

In an embodiment of the present invention, a time unit represents a continuous period of time in the time domain. For example, the time unit may be a subframe, but the present invention is not limited thereto.

The first time unit for transmitting the first signal sequence is separated from the second time unit for transmitting the second signal sequence by one or more predetermined offset values, so that the terminal device can realize time synchronization through detection of the two signal sequences.

For example, when two signal sequences of a first signal are transmitted within one radio frame, frame synchronization can be achieved by the first signal.

For example, TRP transmits the first signal sequence in a first subframe of a radio frame and the second signal sequence in a second subframe of the radio frame, the first and second subframes being separated by half a radio frame. That is, the first signal sequence is transmitted on the first subframe and the second signal sequence is transmitted on the second subframe, so that the terminal device can recognize the half frame timing and the frame timing.

Optionally, the first subframe is subframe 0 of the radio frame, and the second subframe is subframe 5 of the radio frame.

Specifically, the first signal sequence is transmitted in subframe No. 0, and the second signal sequence is transmitted in subframe No. 5. It should be understood that the first signal sequence may also be transmitted on subframe number 1 and the second signal sequence may be transmitted on subframe number 6. In addition, for different transmission unit structure types, for example, for FDD and TDD modes, the first signal may be transmitted on the same subframe, for example, both subframes No. 0 and No. 5, or the first signal may be transmitted on different subframes, for example, one mode is transmitted on subframes No. 0 and No. 5, and the other mode is transmitted on subframes No. 1 and No. 6. That is, the present invention is not limited to the positions of the first subframe and the second subframe.

430, the terminal device performs time synchronization according to the first signal.

And the terminal equipment receives a first signal sent by the TRP and carries out time synchronization according to the first signal. Since at least two signal sequences in the plurality of signal sequences included in the first signal are different and are no longer the same as the two sequences in the LTE system, the terminal device can achieve synchronization only through the first signal, for example, determine half frame timing and frame timing, thereby achieving frame synchronization. Of course, the present application mainly introduces time synchronization, and frequency synchronization may be implemented by using a method in which the first signal is located at the center frequency, or other frequency synchronization schemes may be used. Therefore, the signals for synchronization described in the embodiments of the present application may be used not only for time synchronization but also for time-frequency synchronization, and are not described in detail again. That is, only one kind of synchronization signal is required to achieve synchronization after the first signal of the present invention is used. Therefore, the technical scheme of the embodiment of the invention can simplify the synchronization process, thereby reducing the resource overhead.

Therefore, the method for transmitting signals according to the embodiment of the present invention can simplify the synchronization process by transmitting the first signal including at least two different signal sequences, thereby reducing the resource overhead.

The scheme provided by the embodiment of the present invention with respect to the first signal is described above, and the scheme provided by the embodiment of the present invention with respect to the second signal is described below.

It should be understood that various aspects of the embodiments of the present invention may be implemented separately or combined with each other, and the present invention is not limited thereto.

Fig. 5 shows a schematic flow chart of a method of transmitting a signal according to another embodiment of the invention. The TRP in figure 5 can be the TRP in TRP 101-105 in figure 1; the terminal device may be terminal device 111 in fig. 1.

The TRP generates a second signal, wherein the second signal is used to identify the region identity 510. The region identification may be identified from the second signal only.

In an embodiment of the invention, the region identity is identified by the second signal, i.e. the region identity is identified by the second signal independently and no longer by the first signal and the second signal jointly.

Alternatively, the second signal may include a third signal sequence or a fourth signal sequence, the third signal sequence and the fourth signal sequence being formed by interleaving the first m-sequence and the second m-sequence according to different interleaving orders.

For example, the third signal sequence is formed by interleaving a first m-sequence and a second m-sequence according to a first interleaving order, and the fourth signal sequence is formed by interleaving the first m-sequence and the second m-sequence according to a second interleaving order; alternatively, the third signal sequence is formed by interleaving the first m-sequence and the second m-sequence according to a second interleaving order, and the fourth signal sequence is formed by interleaving the first m-sequence and the second m-sequence according to a first interleaving order.

For example, the sequence of second signals may be generated according to the following equation (2) or (3), where one of equations (2) and (3) may generate a third signal sequence and the other may generate a fourth signal sequence:

wherein n is more than or equal to 0 and less than or equal to 30,

and

can be composed of m sequences

Obtained according to the following equation (4):

in the formula (4)

Is a first m-sequence and is a second m-sequence,

the second m-sequences are all 31 long. M sequence in formula (4)

Obtained from the following equation (5):

in the formula (5), x (i) satisfies the following relationship:

the initial values are: x (0) is 0, x (1) is 0, x (2) is 0, x (3) is 0, and x (4) is 1.

Scrambling sequence

And

this can be obtained from the following equation (7):

wherein the content of the first and second substances,

Index m₀And m₁Can be identified from the region according to the following equation (9)

Deducing:

alternatively, the index m₀And m₁And area identification

The correspondence of (a) can be as shown in table 1.

TABLE 1

From the above, the second signal can identify 168 area identifications. Since all TRPs share the same region identity, e.g., supercell ID, within a supercell, sufficient supercell ID can be identified using the second signal.

Fig. 6a shows a schematic diagram of interleaving of two m-sequences (X and Y). As shown in FIG. 6a, m-sequence X (X)₀，X₁…X₃₀) And m sequence Y (Y)₀，Y₁…Y₃₀) Interleaving may result in, for example, a third signal sequence X₀，Y₀，…X₃₀，Y₃₀. Of course, if the interleaving order is changed one after the other, for example, a fourth signal sequence Y can be obtained₀，X₀，…Y₃₀，X₃₀. Fig. 6b shows a schematic diagram of two signal sequences resulting from the interleaving of two m-sequences according to different interleaving orders. In fig. 6b, the upper signal sequence takes the staggered order of the light-colored m-sequence before and the light-colored m-sequence after, and the lower signal sequence takes the staggered order of the light-colored m-sequence before and the dark-colored m-sequence after.

520, the TRP transmits the second signal.

The TRP transmits the second signal within the radio frame, by means of which the area identification can be achieved.

Since the third signal sequence and the fourth signal sequence are generated according to different interleaving orders, different transmission unit structure types may be indicated by the different interleaving orders. For example, if the third signal sequence is the third signal sequence, it indicates the first transmission unit structure type, for example, the first duplex mode; in the case of the fourth signal sequence, a second transmission unit structure type, for example, a second duplex mode, is indicated.

In this case, for example, the transmitted second signal may be represented by the following equation (10):

optionally, the correspondence between the interleaving order and the transmission unit structure type may be agreed, or may be determined by the network side, which is not limited in the present invention.

In this way, by transmitting the second signal in a different interleaved sequence, different transmission unit structure types can be identified.

Since the transmission unit structure type may be identified by the interleaving order, the time-domain transmission position of the second signal may be the same for different transmission unit structure types. For example, for different transmission unit structure types, the second signal is transmitted on subframes No. 0 and No. 5; of course, the second signal may also be sent on different subframes for different types of transmission unit structures, e.g., on subframes No. 0 and No. 5 for the first type of transmission unit structure, and on subframes No. 1 and No. 6 for the second type of transmission unit structure. That is, the time-domain transmission position of the second signal may be the same or different for different transmission unit structure types, which is not limited in the present invention.

And 530, the terminal equipment identifies the region according to the second signal.

And the terminal equipment receives a second signal sent by the TRP and carries out region identification according to the second signal. Since the area identification can be independently recognized by the second signal, the terminal device can recognize the area only by the second signal. Therefore, the technical scheme of the embodiment of the invention can simplify the area identification process, thereby reducing the resource overhead.

Therefore, the method for transmitting signals according to the embodiment of the present invention can simplify the identification process by transmitting the second signal for identifying the area identifier, thereby reducing the resource overhead.

Optionally, the terminal device may also identify the transmission unit structure type according to the interleaving order. For example, if a sequence in a first interleaving order is received, it is determined as a first transmission unit structure type; if a second interleaved sequence is received, a second transmission unit structure type is determined.

The first signal and the second signal provided by the embodiment of the present invention are described above, respectively. Optionally, as a preferred embodiment, the first signal and the second signal may be adopted at the same time, time synchronization is achieved through the first signal, and region identification and transmission unit structure type identification are achieved through the second signal. For example, a scheme of simultaneously employing the first signal and the second signal of an embodiment of the present invention may be as shown in fig. 7 a.

Optionally, when the first signal and the second signal of the embodiment of the present invention are simultaneously used, for different duplex modes, the transmission position of each synchronization signal in the different duplex modes may be the same. For example, different duplex modes may all employ the design shown in fig. 7 b.

The present invention also provides a method of transmitting a signal in a hybrid Numerology (hybrid bandwidth) mode. Fig. 8 shows a schematic flow chart of a method of transmitting a signal according to a further embodiment of the invention. The TRP in FIG. 8 can be the TRP in TRP 101-105 in FIG. 1; the terminal device may be terminal device 111 in fig. 1.

The TRP transmits a first signal on each of a plurality of subbands of frequency resources of a region, the first signal being used for time synchronization by a terminal device. Of course, those skilled in the art will recognize that the sub-bands may be named otherwise and are within the scope of the present application.

For the hybrid Numerology mode, the frequency resource of the region includes a plurality of subbands, the subband spacing may or may not be fixed, and the lengths of one or more subbands may or may not be uniform. In this case, the TRP transmits the first signal on each subband to time synchronize the terminal devices.

Optionally, the first signal may adopt the first signal provided in the foregoing embodiment of the present invention, and may also adopt other synchronization signals, which is not limited in the present invention.

820, the TRP transmits a second signal on a first subband of the plurality of subbands, the second signal being used to identify the region id of the region, such as the region id of the region alone or in combination with the first signal, and further the second signal may also be used to identify the transmission unit structure type, and further the second signal may also be used to time synchronize, such as frame timing or the like, alone or in combination with the first signal.

Since the region identifiers corresponding to each sub-band are the same, the second signal for identifying the region identifiers can be transmitted only on the first sub-band, and the second signal does not need to be transmitted on each sub-band, so that the resource overhead can be reduced.

Optionally, the number of the first sub-band is greater than or equal to 1 and less than the number of the plurality of sub-bands.

Optionally, the second signal may adopt the second signal provided in the foregoing embodiment of the present invention, and may also adopt other synchronization signals, which is not limited in the present invention.

830, the terminal device performs time synchronization according to the first signal.

In particular, the terminal device may perform time synchronization in each sub-band based on the first signal received on that sub-band.

840, the terminal device identifies the area identification of the area according to the second signal.

Since the region identifiers corresponding to each sub-band are the same, the terminal device can perform region identification according to the second signal on the first sub-band.

Optionally, the time domain transmission position of the first signal is different for different transmission unit structure types, and the time domain transmission position of the first signal is used for identifying the transmission unit structure type.

Specifically, since the second signal is transmitted only on the first subband, and the second signal is not transmitted on the other subbands, only the first signal is transmitted, and therefore, the terminal device can identify the transmission unit configuration type according to the position of the first signal in the radio frame.

Fig. 9 is an example of a transmission signal in the hybrid Numerology mode. As shown in fig. 9, the first signal and the second signal are transmitted only on the subband 0, and only the first signal is transmitted on the other subbands. And the terminal equipment performs region identification according to the second signal and performs synchronization according to the first signal on each sub-band.

The invention also provides a method for transmitting signals in the environment of high-frequency and low-frequency hybrid networking. Fig. 10 shows a schematic flow chart of a method of transmitting a signal according to a further embodiment of the invention. The TRP in figure 10 can be one or more of TRPs 101-105 in figure 1; the terminal device may be terminal device 111 in fig. 1.

In 1010, a first signal is transmitted in a low frequency band of a high-low frequency hybrid networking area, the first signal is used for a terminal device to perform time synchronization in the low frequency band of the area, the time timing includes but is not limited to half frame timing, frame timing and the like, and a third signal is transmitted in a high frequency band of the area, and the third signal is used for the terminal device to perform time synchronization in the high frequency band of the area.

In the environment of high and low frequency hybrid networking, a network side transmits signals for time synchronization in both a low frequency band and a high frequency band, wherein the TRPs of the signals transmitted in the low frequency band and the high frequency band may be different or the same. The low frequency band and the high frequency band may be served by different network devices, e.g., TRPs, respectively; the low frequency band and the high frequency band may also be served by the same network device, e.g., TRP. If the low frequency band and the high frequency band are respectively served by different TRPs, the TRP of the low frequency band sends a first signal, and the TRP of the high frequency band sends a third signal; if the low band and the high band are served by the same TRP, the first signal is transmitted by the TRP in the low band and the third signal is transmitted in the high band.

Optionally, the first signal and the third signal are the same. For example, the first signal provided by the foregoing embodiment of the present invention may be adopted, and other synchronization signals may also be adopted, which is not limited by the present invention.

Optionally, the third signal may be a PSS in an LTE system, i.e. an existing PSS may be employed.

Alternatively, the TRP transmits the same third signal in the high frequency band of the area through different beams, wherein the offsets between the signal sequences in the third signals transmitted by different beams are different, for example, the third signal is two different signal sequences such as signal sequence 1 and signal sequence 2, as shown in fig. 11a, then the offsets of signal sequence 1 and signal sequence 2 of the third signal on one beam can be used to identify the beam, such as the offset shown in fig. 11a is used to identify beam 5. Of course, the third signal may include 2 signal sequences or may be the same signal sequence, for example, the signal sequence 1 and the signal sequence 2 may be the same. The offset may be an offset in the time domain or an offset in the frequency domain, which is used to identify the beam.

Optionally, the TRP transmits a different third signal in the high frequency band of the region via a different beam, the third signal identifying the beam.

Specifically, in the high frequency band, the TRP may transmit signals through different beams. When transmitting the synchronization signal, the synchronization signals transmitted on different beams may be the same, for example, as shown in fig. 11a, where the offsets between the signal sequences in the third signals transmitted by different beams are different, and the different offsets are used for identifying the beams; the synchronization signals transmitted on different beams may also be different, for example, as shown in fig. 11b, different synchronization signals are used to identify the beams, and of course, the offsets between the signal sequences in the third signals transmitted on the respective beams in fig. 11b are the same, but they may also be different. The third signal in fig. 11b may contain different signal sequences or the same signal sequence.

And 1020, transmitting a second signal in a low frequency band of the area, the second signal being used for identifying an area identification of the area.

And transmitting the second signal in the low frequency band, not transmitting the second signal in the high frequency band, and carrying out region identification by the terminal equipment according to the second signal in the low frequency band.

The terminal device performs time synchronization 1030 according to the first signal and the third signal.

Specifically, the terminal device may perform time synchronization in the low frequency band according to the first signal of the low frequency band, and perform time synchronization in the high frequency band according to the third signal of the high frequency band.

1040, the terminal device identifies the area identification of the area according to the second signal.

Since the area identifications corresponding to the high frequency band and the low frequency band are the same, the terminal device can perform area identification according to the second signal in the low frequency band.

Optionally, the time-domain transmission position of the third signal is different for different transmission unit structure types, and the time-domain transmission position of the third signal is used for identifying the transmission unit structure type.

Specifically, since the second signal is transmitted only in the low frequency band, the second signal is not transmitted in the high frequency band, and only the third signal is transmitted, the terminal device can identify the transmission unit configuration type according to the position of the third signal within the radio frame.

It should be understood that in the low frequency band, the transmission unit structure type may be identified according to the second signal, and the present invention is not limited thereto.

Fig. 12 is an example of a transmission signal in a high and low frequency hybrid networking region. As shown in fig. 12, the first signal is transmitted in both the high band and the low band, and the second signal is transmitted only in the low band.

It should be understood that, in the high-low frequency hybrid networking region in fig. 12, the high frequency band and the low frequency band are divided by 6GHz, which is only an example, and the present invention does not limit the dividing manner of the high frequency band and the low frequency band.

It is to be understood that in various embodiments of the present invention, the second signal may be transmitted through a partial TRP of the region to further reduce resource overhead.

It should be understood that the specific examples are included merely as a prelude to a better understanding of the embodiments of the present invention for those skilled in the art and are not intended to limit the scope of the embodiments of the present invention.

It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Having described the method of transmitting a signal according to an embodiment of the present invention in detail above, an apparatus of transmitting a signal according to an embodiment of the present invention will be described below.

Fig. 13 is a schematic block diagram of an apparatus 1300 to transmit signals according to one embodiment of the present invention. The apparatus 1300 is a network-side device, and may be a TRP, for example.

It is to be understood that the apparatus 1300 may correspond to one or more TRPs in various method embodiments, and may have any function of a TRP in a method.

As shown in fig. 13, the apparatus 1300 includes a processor 1310 and a transceiver 1320.

In one embodiment, the processor 1310 is configured to generate a first signal, where the first signal includes N signal sequences, at least two of the N signal sequences are different, N is a positive integer greater than or equal to 2, and the first signal is used for time synchronization of a terminal device only according to the first signal;

the transceiver 1320 is configured to transmit the first signal.

Optionally, the N signal sequences are transmitted in different N time units, the different N time units being separated by one or more predetermined offset values.

Optionally, N is 2, the N signal sequences are a first signal sequence and a second signal sequence, and the first signal sequence and the second signal sequence are conjugate to each other.

Optionally, the transceiver 1320 is specifically configured to transmit the first signal sequence in a first time unit and transmit the second signal sequence in a second time unit, the first time unit being separated from the second time unit by one or more predetermined offset values.

Optionally, the N signal sequences are ZC sequences.

In another embodiment, the processor 1310 is configured to generate a second signal, wherein the second signal is used to identify the region identifier;

the transceiver 1320 is configured to transmit the second signal.

Optionally, the second signal comprises a third signal sequence or a fourth signal sequence, the third signal sequence and the fourth signal sequence being formed by interleaving the first m-sequence and the second m-sequence according to different interleaving orders.

Optionally, the interleaving order is used to identify the transmission unit structure type.

Optionally, the time domain transmission positions of the second signal are the same for different transmission unit structure types.

Optionally, the transceiver 1320 is specifically configured to transmit the second signal on a first subband of a plurality of subbands when the frequency resources of the region include the plurality of subbands.

Optionally, the transceiver 1320 is specifically configured to transmit the second signal in a low frequency band of the area when the area is a high and low frequency hybrid networking area.

Optionally, the transceiver 1320 is specifically configured to transmit the first signal on each of a plurality of subbands when the frequency resources of the region include the plurality of subbands.

Optionally, the transceiver 1320 is specifically configured to transmit the first signal in a low frequency band and a high frequency band of the area when the area is a high and low frequency hybrid networking area.

Optionally, the transceiver 1320 is specifically configured to transmit the same first signal through different beams in a high frequency band of the region, where an offset between signal sequences in the first signal transmitted by different beams is different, and the offset is used for identifying a beam; alternatively, the first and second electrodes may be,

In another embodiment, the processor 1310 is configured to generate a first signal and a second signal;

the transceiver 1320 is configured to transmit the first signal on each of a plurality of subbands of a frequency resource of a region, the first signal being used for time synchronization by a terminal device, and transmit the second signal on the first subband of the plurality of subbands, the second signal being used for identifying a region identifier of the region.

In another embodiment, the apparatus 1300 is an apparatus for transmitting signals in a high frequency band of a high and low frequency hybrid networking region, wherein a first signal and a second signal are transmitted in a low frequency band of the region, the first signal is used for a terminal device to perform time synchronization in the low frequency band of the region, and the second signal is used for identifying a region identifier of the region;

the processor 1310 is configured to generate a third signal;

the transceiver 1320 is configured to transmit the third signal in the high frequency band of the area, where the third signal is used for the terminal device to perform time synchronization in the high frequency band of the area.

Optionally, the first signal and the third signal are the same.

Optionally, the transceiver 1320 is specifically configured to transmit the same third signal through different beams in the high frequency band of the area, where an offset between signal sequences in the third signals transmitted by different beams is different, and the offset is used for identifying a beam; alternatively, the first and second electrodes may be,

In another embodiment, the apparatus 1300 is an apparatus for transmitting signals in a low frequency band of a high-frequency and low-frequency hybrid networking area, where a high frequency band of the area transmits a third signal, and the third signal is used for a terminal device to perform time synchronization in the high frequency band of the area;

the processor 1310 is configured to generate a first signal and a second signal, the first signal is used for the terminal device to perform time synchronization in a low frequency band of the area, and the second signal is used for identifying an area identifier of the area;

the transceiver 1320 is used to transmit the first signal and the second signal in a low frequency band of the region.

In another embodiment, the present invention also provides a system, which may include the above-mentioned apparatus for transmitting signals in a high frequency band of a high and low frequency hybrid networking area and the apparatus for transmitting signals in a low frequency band of the high and low frequency hybrid networking area.

Fig. 14 is a schematic block diagram of an apparatus 1400 for transmitting signals according to another embodiment of the present invention. The apparatus 1400 may be a terminal device.

It should be understood that the apparatus 1400 may correspond to the terminal device in each method embodiment, and may have any function of the terminal device in the method.

As shown in fig. 14, the apparatus 1400 includes a processor 1410 and a transceiver 1420.

In one embodiment, the transceiver 1420 is configured to receive a first signal, where the first signal includes N signal sequences, at least two of the N signal sequences are different, and N is a positive integer greater than or equal to 2;

the processor 1410 is configured to perform time synchronization according to the first signal.

Optionally, the processor 1410 is specifically configured to determine a field timing and a frame timing according to the first signal sequence and the second signal sequence.

In another embodiment, the transceiver 1420 is configured to receive a second signal, wherein the second signal is used to identify an area identifier;

the processor 1410 is configured to perform region identification according to the second signal.

Optionally, the processor 1410 is further configured to identify a transmission unit structure type according to an interleaving order of the third signal sequence or the fourth signal sequence.

Optionally, the transceiver 1420 is specifically configured to receive the second signal on a first subband of a plurality of subbands when the frequency resources of the region include the plurality of subbands.

Optionally, the transceiver 1420 is specifically configured to receive the second signal in a low frequency band of an area when the area is a high and low frequency hybrid networking area.

Optionally, the transceiver 1420 is specifically configured to receive the first signal on each of a plurality of subbands when the frequency resources of the region include the plurality of subbands.

Optionally, the transceiver 1420 is specifically configured to receive the first signal in a low frequency band and a high frequency band of an area when the area is a high and low frequency hybrid networking area.

In another embodiment, the transceiver 1420 is configured to receive a first signal on each of a plurality of subbands of a frequency resource of a region and a second signal on a first subband of the plurality of subbands;

the processor 1410 is configured to perform time synchronization according to the first signal, and identify a region id of the region according to the second signal.

Optionally, the processor 1410 is further configured to identify a transmission unit structure type according to the time-domain transmission position of the first signal.

In another embodiment, the transceiver 1420 is configured to receive a first signal in a low frequency band of a high and low frequency hybrid networking area, receive a third signal in a high frequency band of the area, and receive a second signal in a low frequency band of the area;

the processor 1410 is configured to perform time synchronization in a low frequency band of the region according to the first signal, perform time synchronization in a high frequency band of the region according to the third signal, and identify a region identifier of the region according to the second signal.

Optionally, the first signal and the third signal are the same.

Optionally, the processor 1410 is further configured to identify a beam of a high frequency band of the region according to an offset between signal sequences in the third signal; alternatively, the high band beam of the region is identified from the third signal.

It is to be understood that the processor 1310 and/or the processor 1410 in the embodiments of the present invention may be implemented by a processing unit or a chip, and alternatively, the processing unit may be formed by a plurality of units in the implementation process.

It should be understood that the transceiver 1320 or the transceiver 1420 in the embodiments of the present invention may be implemented by a transceiver unit or a chip, and alternatively, the transceiver 1320 or the transceiver 1420 may be formed by a transmitter or a receiver, or by a transmitting unit or a receiving unit.

Optionally, the transceiving node or terminal device may further comprise a memory, which may store program code, and the processor may call the program code stored in the memory to implement the respective function of the transceiving node or terminal device.

The Device of the embodiment of the present invention may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a System Chip (System on Chip, SoC), a Central Processing Unit (CPU), a Network Processor (NP), a Digital Signal processing Circuit (DSP), a microcontroller (Micro Controller Unit, MCU), a Programmable Logic Device (PLD) or other Integrated chips.

The embodiment of the invention also comprises a communication system which comprises the transceiving node in the transceiving node embodiment and the terminal device in the terminal device embodiment.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a transceiver node, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of transmitting a signal, comprising:

generating a first signal, wherein the first signal comprises N signal sequences, at least two of the N signal sequences are different, N is a positive integer greater than or equal to 2, and the first signal is used for terminal equipment to perform time synchronization only according to the first signal;

transmitting the first signal;

generating a second signal, wherein the second signal is used for identifying an area identification;

and transmitting the second signal.

2. The method of claim 1, wherein the N signal sequences are transmitted in different N time units, the different N time units being separated by one or more predetermined offset values.

3. The method of claim 1 or 2, wherein N is 2, and wherein the N signal sequences are a first signal sequence and a second signal sequence, and wherein the first signal sequence and the second signal sequence are conjugate to each other.

4. The method of claim 3, wherein said transmitting the first signal comprises:

5. The method of claim 4, wherein the first time unit is a first subframe of a radio frame, wherein the second time unit is a second subframe of the radio frame, and wherein the first subframe is separated from the second subframe by half of a radio frame.

6. The method of claim 1, wherein the N signal sequences are ZC sequences.

7. The method of claim 1, wherein the second signal comprises a third signal sequence or a fourth signal sequence, and wherein the third signal sequence and the fourth signal sequence are formed by interleaving a first m-sequence and a second m-sequence according to different interleaving orders.

8. The method of claim 7, wherein the first m-sequence and the second m-sequence are each 31 a long.

9. The method according to claim 7 or 8, wherein the interleaving order is used for identifying a transmission unit structure type.

10. The method of claim 1, wherein the time domain transmission locations of the second signal are the same for different transmission unit structure types.

11. The method of claim 1, wherein said transmitting the second signal comprises:

transmitting the second signal on a first subband of a plurality of subbands when frequency resources of a region include the plurality of subbands.

12. The method of claim 1, wherein said transmitting the second signal comprises:

and when the area is a high-low frequency hybrid networking area, transmitting the second signal in a low frequency band of the area.

13. The method of claim 1, wherein said transmitting the second signal comprises:

the second signal is transmitted by a partial transceiving node TRP of the region.

14. The method of claim 1, wherein said transmitting the first signal comprises:

transmitting the first signal on each of a plurality of subbands when frequency resources of a region include the plurality of subbands.

15. The method of claim 1, wherein said transmitting the first signal comprises:

and when the area is a high-low frequency mixed networking area, transmitting the first signal in the low frequency band and the high frequency band of the area.

16. The method of claim 15, wherein said transmitting the first signal comprises:

and transmitting the same first signal through different beams in a high frequency band of the region, wherein offsets between signal sequences in the first signals transmitted by different beams are different, and the offsets are used for identifying the beams.

17. The method of claim 15, wherein said transmitting the first signal comprises:

and transmitting different first signals through different beams in the high frequency band of the region, wherein the first signals are used for identifying the beams.

18. The method of claim 1, wherein said transmitting the first signal comprises:

the first signal is transmitted through all TRPs of a region.

19. The method according to any of claims 15 to 18, wherein the time domain transmission position of the first signal is different for different transmission unit structure types, and the time domain transmission position of the first signal is used for identifying the transmission unit structure type.

20. A method of transmitting a signal, comprising:

performing time synchronization according to the first signal;

receiving a second signal, wherein the second signal is used for identifying an area identifier;

and performing region identification according to the second signal.

21. The method of claim 20, wherein N is 2, wherein the N signal sequences are a first signal sequence and a second signal sequence, and wherein the first signal sequence and the second signal sequence are conjugate to each other.

22. The method of claim 21, wherein the time synchronizing according to the first signal comprises:

determining a field timing and a frame timing from the first signal sequence and the second signal sequence.

23. A method according to any one of claims 20 to 22, wherein the N signal sequences are ZC sequences.

24. The method of claim 20, wherein the second signal comprises a third signal sequence or a fourth signal sequence, and wherein the third signal sequence and the fourth signal sequence are formed by interleaving a first m-sequence and a second m-sequence according to different interleaving orders.

25. The method of claim 24, wherein the first m-sequence and the second m-sequence are each 31 a long.

26. The method of claim 24 or 25, further comprising:

identifying a transmission unit structure type according to an interleaving order of the third signal sequence or the fourth signal sequence.

27. The method of claim 20, wherein the receiving the second signal comprises:

receiving the second signal on a first subband of a plurality of subbands when frequency resources of a region include the plurality of subbands.

28. The method of claim 20, wherein the receiving the second signal comprises:

and when the area is a high-low frequency hybrid networking area, receiving the second signal in a low frequency band of the area.

29. The method of claim 20, wherein the receiving the first signal comprises:

receiving the first signal on each of a plurality of subbands when frequency resources of a region include the plurality of subbands.

30. The method of claim 20, wherein the receiving the first signal comprises:

31. The method of claim 29 or 30, further comprising:

32. An apparatus for transmitting a signal, comprising a processor and a transceiver; wherein the content of the first and second substances,

the processor is configured to generate a first signal, where the first signal includes N signal sequences, at least two of the N signal sequences are different, N is a positive integer greater than or equal to 2, and the first signal is used for a terminal device to perform time synchronization only according to the first signal;

the transceiver is used for transmitting the first signal;

the processor is further configured to generate a second signal, wherein the second signal is used to identify a region identifier;

the transceiver is further configured to transmit the second signal.

33. The apparatus of claim 32 wherein the N signal sequences are transmitted in different N time units, the different N time units being separated by one or more predetermined offset values.

34. The apparatus of claim 32 or 33, wherein N is 2, wherein the N signal sequences are a first signal sequence and a second signal sequence, and wherein the first signal sequence and the second signal sequence are conjugate to each other.

35. The apparatus of claim 34, wherein the transceiver is specifically configured to transmit the first signal sequence in a first time unit and the second signal sequence in a second time unit, and wherein the first time unit is separated from the second time unit by one or more predetermined offset values.

36. The apparatus of claim 32 wherein the N signal sequences are ZC sequences.

37. The apparatus of claim 32, wherein the second signal comprises a third signal sequence or a fourth signal sequence, and wherein the third signal sequence and the fourth signal sequence are formed by interleaving a first m-sequence and a second m-sequence according to different interleaving orders.

38. The apparatus of claim 37, wherein the interleaving order is used to identify a transmission unit structure type.

39. The apparatus according to any of claims 36 to 38, wherein the time domain transmission positions of the second signal are the same for different transmission unit structure types.

40. The apparatus of claim 32, wherein the transceiver is further configured to transmit the second signal on a first subband of a plurality of subbands when frequency resources of a region comprise the plurality of subbands.

41. The apparatus of claim 32, wherein the transceiver is specifically configured to transmit the second signal in a low frequency band of a region when the region is a high frequency and low frequency hybrid networking region.

42. The apparatus of claim 32, wherein the transceiver is further configured to transmit the first signal on each of a plurality of subbands when the frequency resources of a region comprise the plurality of subbands.

43. The apparatus of claim 32, wherein the transceiver is specifically configured to transmit the first signal in a low frequency band and a high frequency band of an area when the area is a high and low frequency hybrid networking area.

44. The apparatus according to claim 43, wherein the transceiver is specifically configured to transmit the same first signal via different beams in a high frequency band of the region, wherein offsets between signal sequences in the first signals transmitted by different beams are different, and the offsets are used for identifying the beams; alternatively, the first and second electrodes may be,

45. The apparatus according to any of claims 42-44, wherein the time domain transmission position of the first signal is different for different transmission unit structure types, and wherein the time domain transmission position of the first signal is used for identifying a transmission unit structure type.

46. An apparatus for transmitting a signal, comprising a processor and a transceiver; wherein the content of the first and second substances,

the transceiver is configured to receive a first signal, where the first signal includes N signal sequences, at least two of the N signal sequences are different, and N is a positive integer greater than or equal to 2;

the processor is used for carrying out time synchronization according to the first signal;

the transceiver is further configured to receive a second signal, wherein the second signal is used to identify an area identifier;

the processor is further configured to perform region identification according to the second signal.

47. The apparatus of claim 46, wherein N is 2, wherein the N signal sequences are a first signal sequence and a second signal sequence, and wherein the first signal sequence and the second signal sequence are conjugate to each other.

48. The apparatus of claim 47, wherein the processor is further configured to determine a field timing and a frame timing based on the first signal sequence and the second signal sequence.

49. The apparatus of claim 46, wherein the second signal comprises a third signal sequence or a fourth signal sequence, and wherein the third signal sequence and the fourth signal sequence are formed by interleaving a first m-sequence and a second m-sequence according to different interleaving orders.

50. The apparatus of claim 49, wherein the processor is further configured to identify a transmission unit structure type according to an interleaving order of the third signal sequence or the fourth signal sequence.

51. The apparatus according to any of claims 48 to 50, wherein the transceiver is configured to receive the second signal on a first subband among a plurality of subbands when frequency resources of a region comprise the plurality of subbands.

52. The apparatus of claim 46, wherein the transceiver is specifically configured to receive the second signal in a low frequency band of a region when the region is a high and low frequency hybrid networking region.

53. The apparatus of claim 46, wherein the transceiver is further configured to receive the first signal on each of a plurality of subbands when the frequency resources of a region comprise the plurality of subbands.

54. The apparatus of claim 46, wherein the transceiver is specifically configured to receive the first signal in a low frequency band and a high frequency band of an area when the area is a high and low frequency hybrid networking area.