CN107947908B

CN107947908B - Synchronization signal sending method, synchronization signal receiving method, network equipment and terminal equipment

Info

Publication number: CN107947908B
Application number: CN201610894126.7A
Authority: CN
Inventors: 王飞
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2016-10-13
Filing date: 2016-10-13
Publication date: 2020-11-24
Anticipated expiration: 2036-10-13
Also published as: CN107947908A

Abstract

The invention discloses a method for sending and receiving a synchronous signal, network equipment and terminal equipment, wherein the method comprises the following steps: determining reference symbol resources in each sending period, wherein the positions of the reference symbol resources in each sending period are the same; determining at least a first symbol resource and a second symbol resource occupied by each narrow-coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource; wherein the first symbol resource and the second symbol resource are located at the same or different positions in respective transmission periods; and transmitting the synchronization signal based on the symbol resource corresponding to each narrow-coverage beam.

Description

Synchronization signal sending method, synchronization signal receiving method, network equipment and terminal equipment

Technical Field

The present invention relates to signal processing technologies in the field of communications, and in particular, to a synchronization signal sending method, a synchronization signal receiving method, a network device, and a terminal device.

Background

The large-scale antenna is a key technology of a 5G new air interface, and the 5G new air interface needs to support low frequency and high frequency. In a high frequency band, in order to protect against larger penetration loss and path loss (20-30 dB larger than low frequency loss) and ensure coverage performance, a large-scale antenna (100 or even 1000 antenna elements are needed) is required to be adopted for beamforming to enhance the coverage performance. But this also results in a narrowing of the beam and does not cover all users of the cell at the same time. Cell search based on multiple narrow coverage beams for scanning is a research issue in a current 5G new air interface, but the cell search using multiple narrow coverage beams may have a problem that even if a terminal device detects a Primary Synchronization Signal (PSS) or a Secondary Synchronization Signal (SSS), the corresponding narrow coverage beams cannot be determined.

Disclosure of Invention

In view of the above, the present invention provides a synchronization signal sending method, a synchronization signal receiving method, a network device, and a terminal device, which can solve at least the above problems in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the embodiment of the invention provides a method for sending a synchronous signal, which comprises the following steps:

determining reference symbol resources in each sending period, wherein the positions of the reference symbol resources in each sending period are the same;

determining at least a first symbol resource and a second symbol resource occupied by each narrow-coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource; wherein the first symbol resource and the second symbol resource are located at the same or different positions in respective transmission periods;

and transmitting the synchronization signal based on the symbol resource corresponding to each narrow-coverage beam.

The embodiment of the invention provides a synchronous signal receiving method, which is applied to terminal equipment and comprises the following steps:

receiving two adjacent synchronous signals in one sending period or two adjacent sending periods, and acquiring a symbol difference value between the two adjacent synchronous signals;

and determining the symbol resource position of the narrow coverage beam or the wide coverage beam corresponding to the received synchronization signal based on the position of the reference symbol resource and the symbol difference value between the two adjacent synchronization signals.

The embodiment of the invention provides network equipment, which comprises a signal sending unit, a signal receiving unit and a signal sending unit, wherein the signal sending unit is used for at least supporting that at least one narrow coverage wave beam is adopted to send a synchronous signal;

the network device further includes:

the processing unit is used for determining the reference symbol resources in each sending period, and the positions of the reference symbol resources in each sending period are the same; determining at least a first symbol resource and a second symbol resource occupied by each narrow-coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource; wherein the first symbol resource and the second symbol resource are located at the same or different positions in respective transmission periods;

correspondingly, the signal transmitting unit is configured to transmit the synchronization signal based on the symbol resource corresponding to each narrow coverage beam.

An embodiment of the present invention provides a terminal device, where the terminal device includes:

the processing unit is used for determining the reference symbol resources in each sending period, and the positions of the reference symbol resources in each sending period are the same; acquiring a symbol difference value between the two adjacent synchronous signals; determining a symbol resource position where a narrow coverage beam or a wide coverage beam corresponding to the received synchronization signal is located based on the position of the reference symbol resource and a symbol difference value between the two adjacent synchronization signals;

and the signal receiving unit is used for receiving two adjacent synchronous signals in one sending period or two adjacent sending periods.

The embodiment of the invention provides a synchronization signal sending method, a synchronization signal receiving method, network equipment and terminal equipment. In this way, the terminal side receiving the synchronization signal can determine the symbol where the received narrow coverage beam is located by combining the position of the reference symbol resource and the position difference between the two symbol resources and the reference symbol resource, thereby realizing that the synchronization signal search is completed at least based on the narrow coverage beam.

Drawings

Fig. 1 is a schematic flow chart of a method for sending a synchronization signal according to an embodiment of the present invention;

FIG. 2 is a first schematic diagram of sending resources according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a second example of sending resources according to the present invention;

FIG. 4 is a third schematic diagram of sending resources according to an embodiment of the present invention;

FIG. 5 is a flowchart illustrating a method for receiving a synchronization signal according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a fourth example of sending resources according to the present invention;

FIG. 7 is a schematic diagram of a network device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a structure of a terminal device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The first embodiment,

An embodiment of the present invention provides a synchronization signal sending method, which is applied to a network device, where the network device at least supports sending a synchronization signal by using at least one narrow coverage beam, as shown in fig. 1, where the method includes:

step 101: determining reference symbol resources in each sending period, wherein the positions of the reference symbol resources in each sending period are the same;

step 102: determining at least a first symbol resource and a second symbol resource occupied by each narrow-coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource; wherein the first symbol resource and the second symbol resource are located at the same or different positions in respective transmission periods;

step 103: and transmitting the synchronization signal based on the symbol resource corresponding to each narrow-coverage beam.

Here, the synchronization signal may specifically be a synchronization signal of a 5G new air interface. The synchronization signal may include: primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS); the transmission scheme used may be a multiple narrow coverage beam (multiple narrow beam) based transmission scheme, or a transmission scheme combining a wide coverage beam (wide coverage beam) and a multiple narrow coverage beam (multiple narrow beam).

Specifically, the PSS and the SSS may both use 5ms as a period, information sent by the PSS is the same each time, information sent by the SSS in two adjacent times is different, and a cell Identification (ID) parameter (i.e., a physical cell ID) may be obtained by correctly decoding the PSS and the SSS.

In each transmission period, viewed from the time domain, the synchronization signal occupies a plurality of continuous or discontinuous OFDMA symbol resources; from the frequency domain, the synchronization signal occupies the central part of the system bandwidth or the whole frequency band resource.

One of the OFDMA symbol resources is used as a reference symbol resource, that is, a reference symbol resource of a symbol resource in a fixed beam, among the OFDMA symbol resources occupied in each transmission period of the synchronization signal.

It should be understood that the network device in this embodiment may be a management device in a mobile communication network, and may also be a base station in the mobile communication network.

The scheme provided by the embodiment is mainly directed to a scene based on a narrow coverage beam, which may include two specific sub-scenes, one is a scene that the narrow coverage beam is used completely, and the other is a scene that the narrow coverage beam and a wide coverage beam are combined. However, for a scenario with only wide coverage beams, for example, when the base station transmits the synchronization signal using a wide coverage beam (wide coverage beam) similar to LTE, the base station may transmit the synchronization signal using the wide coverage beam on the reference symbol resource.

If the base station adopts a mode of scanning a plurality of narrow covering beams to send the synchronous signals, the same narrow beam is adopted to send on the symbol resource of each sending period; if the base station transmits the synchronization signal by combining the window coverage beam and the multiple narrow coverage beam, the symbol resource of each transmission period is transmitted by adopting the wide coverage beam, and other symbol resources are transmitted by adopting the multiple narrow coverage beams.

Specifically, the present embodiment provides two schemes:

the first scheme mainly explains a scheme for transmitting a synchronization signal by using symbol resources at different positions of the same narrow coverage beam in two adjacent transmission periods, and the following two scenarios exist:

scenario one, for example, includes only a plurality of narrow coverage beams:

the determining, based on the position of the reference symbol resource, at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period or two adjacent transmission periods includes:

and at least determining that the first symbol resource is occupied in a first transmission period of two adjacent transmission periods and the second symbol resource is occupied in a second transmission period of the two adjacent transmission periods based on the position of the reference symbol resource.

The method specifically comprises the following steps: determining a symbol offset m corresponding to the identification information of each narrow coverage beam based on the corresponding relation between the identification information and the symbol offset; m is an integer; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

and determining that a first symbol resource occupied by each narrow coverage beam in a first sending period is x + m and a second symbol resource occupied by each narrow coverage beam in a second sending period is x-m based on the position x of the reference symbol resource and the symbol offset m corresponding to the identification information of each narrow coverage beam.

The correspondence between the identification information and the symbol offset may be as follows:

the symbol offset corresponding to the narrow coverage beam1 is 0; the symbol offset for the narrow coverage beam2 is 1, and so on, which is not exhaustive here.

In two adjacent transmission periods of the synchronization signal (which may be PSS or SSS), besides the OFDMA symbol corresponding to the position reference symbol resource of the reference symbol resource, several other symbols for transmitting the synchronization signal are used to transmit other narrow beams.

Specifically, the transmission method is as follows: taking a certain "narrow beam n" as an example, consider two adjacent transmission periods, and assume that the reference symbol resource corresponds to the "x" th symbol in each transmission period. In the first transmission period, if "beam n" occupies symbol resource "x + m", then in the second transmission period, "beam n" occupies symbol resource "x-m" (m may be a positive integer or a negative integer).

Scenario two, take the example including one wide coverage beam and multiple narrow coverage beams:

when the network equipment also supports the adoption of a wide-coverage wave beam to send a synchronous signal, determining that the wide-coverage wave beam occupies a reference symbol resource in each sending period;

determining a symbol offset a corresponding to the identification information of each narrow coverage beam based on the corresponding relation between the identification information and the symbol offset; a is an integer not equal to 0; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

and determining that a first symbol resource occupied by each narrow coverage beam in a first sending period is x + a and a second symbol resource occupied by each narrow coverage beam in a second sending period is x-a based on the position x of the reference symbol resource and the symbol offset a corresponding to the identification information of each narrow coverage beam.

The difference from the scenario one is that the same symbol position, i.e., the position of the reference symbol resource, in two adjacent transmission periods is used for transmitting the synchronization signal (PSS or SSS) of the wide coverage beam.

Accordingly, the correspondence relationship between the identification information and the symbol offset may be as follows:

the symbol offset corresponding to the narrow coverage beam1 is 1; the symbol offset for narrow coverage beam2 is 2 and so on, which is not exhaustive here. It can be seen that the symbol offset in the correspondence in this scenario cannot be 0.

In two adjacent transmission periods of the synchronization signal (which may be PSS or SSS), besides the OFDMA symbol corresponding to the position reference symbol resource of the reference symbol resource, several other symbols for transmitting the synchronization signal are used for transmitting other narrow coverage beams (narrow beams).

Specifically, the transmission method is as follows: taking a certain "narrow beam n" as an example, consider two adjacent transmission periods, and assume that the reference symbol resource corresponds to the "x" th symbol in each transmission period. In the first transmission period, the wide-coverage beam is transmitted at the xth symbol, if the symbol offset corresponding to "beam n" is a, the occupied symbol resource "x + a" is transmitted, and in the second transmission period, the wide-coverage beam is transmitted at the xth symbol, and the occupied symbol resource "x-a" of "beam n" is transmitted (a can be a positive integer or a negative integer which is not 0).

It should be further noted that, the determining the reference symbol resource in each transmission period includes determining the position of the reference symbol resource in each transmission period; the specific determination manner may be set according to actual situations, for example, may be set at a symbol position in the middle of each transmission period, for example, referring to fig. 2, 14 symbols are included in a transmission subframe in one transmission period, and the middle 7 th symbol (symbol numbered as 6 in slot 0) may be set as the position of the reference symbol resource.

Referring to fig. 2, the time domain resources occupied by PSS or SSS are shown as follows:

in fig. 2, taking the Multi-narrow coverage Beam based transmission scheme as an example, assuming that the synchronization signal illustrated in the figure is PSS, the wide coverage Beam1 is set to the reference symbol resource, and the position of the reference symbol resource in the scenario illustrated in fig. 2 is symbol 6 in slot0, accordingly:

if UE1 is covered by the wide-coverage Beam1, UE1 may detect PSS at "symbol 6" of "slot 0" of "subframe 0" and "symbol 6" of "slot 0" of "subframe 5", respectively, with a difference of 5ms between the two time instants, so that UE1 may locate to 5ms timing and know that the detected PSS is located at "symbol 6" of "slot 0" of "subframe 0" or "subframe 5";

if UE1 is covered by Beam2, UE1 may detect PSS at "symbol 5" of "slot 0" of "subframe 0" and "symbol 0" of "slot 1" of "subframe 5", respectively, assuming that one symbol length is k, the two PSS instants differ by "5 ms +2 k", so that UE1 knows that the first PSS detected is located at the previous symbol of the reference symbol resource, i.e., "symbol 5" of "slot 0"; the second PSS detected is located at the latter symbol of the reference symbol resource, i.e. "symbol 0" of "slot 1". So that 5ms timing can be located as well.

For another example, referring to fig. 3, time domain resources occupied by the PSS and the SSS are shown, in the figure, subframe No. 0 and subframe No. 5 are used for transmitting the PSS; subframe number 1 and subframe number 6 are used to transmit SSS. Taking subframe No. 0 and subframe No. 5 as examples for detailed description, assuming that only multiple narrow coverage beams are used, and the OFDMA symbol numbered 6 in slot0 in subframe No. 0 and subframe No. 5 is used as a reference symbol resource, then the reference symbol resource in subframe No. 0 and subframe No. 5 is used to transmit the synchronization signal of narrow coverage beam1, and correspondingly, it is assumed that the identification information of the beam in the preset correspondence is 2, the corresponding symbol offset m may be 1, and the symbol offset m corresponding to the identification information 3 may be 2; the symbol resources corresponding to the narrow coverage beam2 in the sub-frame 0 and the sub-frame 5 are, respectively, the first symbol resource 6+1, that is, the OFDMA symbol numbered 0 in the slot 1 shown in the figure (since the maximum number of the symbol in each slot is 6, when the calculated value is greater than 6, the symbol is counted again from 0, that is, the number of the symbol in the corresponding next slot, and when the reference symbol resource is the OFDMA symbol numbered 6 in the slot0, the resource corresponding to the symbol offset plus 1 is the next slot, that is, the OFDMA symbol numbered 0 in the slot 1), the symbol resource corresponding to the narrow coverage beam2 in the sub-frame 5 is the second symbol resource 6-1, that is, the OFDMA symbol numbered 5 (when the reference symbol resource is the OFDMA symbol numbered 6 in the slot0, the resource corresponding to the symbol offset minus 1 is the same slot, i.e., OFDMA symbol numbered 5 in slot 0); the determination method of the symbol resource positions of other narrow coverage beams is the same as the calculation method described above, and is not described again.

Scheme II,

A scheme for performing transmission of a synchronization signal on symbol resources at different positions of a same narrow coverage beam in a same transmission period is mainly described, where the determining, based on the position of the reference symbol resource, at least a first symbol resource and a second symbol resource that are occupied by each narrow coverage beam in each transmission period or two adjacent transmission periods includes:

determining at least a first symbol resource and a second symbol resource occupied by each narrow-coverage beam in each transmission period based on the position of the reference symbol resource.

Specifically, there are two scenarios:

scene one,

The determining, based on the position of the reference symbol resource, at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period includes:

determining a symbol offset m corresponding to the identification information of each narrow coverage beam based on the corresponding relation between the identification information and the symbol offset; m is an integer; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

and determining that the first symbol resource occupied by each narrow coverage beam in each transmission period is x + m and the second symbol resource is x-m based on the position x of the reference symbol resource and the symbol offset m corresponding to the identification information of each narrow coverage beam.

In each transmission period of the synchronization signal, besides the OFDMA symbol corresponding to the reference symbol resource, several other symbols for transmitting the synchronization signal are used to transmit other narrow beams.

Specifically, the transmission method is as follows: taking a certain narrow beam n as an example, consider a certain transmission period, and assume that the reference symbol resource corresponds to the "x" th symbol in each transmission period, and the symbol uses a wide beam or a narrow beam;

each of the other narrow beams needs to occupy two symbol resources, and the two symbol resources are symmetric around the symbol resource "x", that is, for the m-th symbol before the symbol (symbol resource "x-m") and the m-th symbol after the symbol (symbol resource "x + m"), both the m-th symbol before the symbol (symbol resource "x-m") and the m-th symbol after the symbol (symbol resource "x + m") are used to transmit the same narrow beam.

Scene two,

determining a symbol offset a corresponding to the identification information of each narrow coverage beam based on the corresponding relation between the identification information and the symbol offset; a is an integer other than 0; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

and determining that the first symbol resource occupied by each narrow coverage beam in each transmission period is x + a and the second symbol resource is x-a based on the position x of the reference symbol resource and the symbol offset a corresponding to the identification information of each narrow coverage beam.

Specifically, the transmission method is as follows: taking a certain "narrow beam n" as an example, consider two adjacent transmission periods, and assume that the reference symbol resource corresponds to the "x" th symbol in each transmission period. In the transmission period, the wide-coverage beam is transmitted at the xth symbol, if the symbol offset corresponding to "beam n" is a, the occupied first symbol resource "x + a" and second symbol resource "x-a" (a may be a positive integer or a negative integer different from 0) are occupied.

For example, referring to fig. 4, the time domain resources occupied by PSS or SSS are shown as follows: taking the Multi-narrow beam based transmission scheme as an example, assume that the synchronization signal illustrated in the figure is PSS:

when all beams are narrow coverage beams, if UE1 is covered by Beam1, UE1 can only detect PSS on one symbol every 5ms transmission period, for example, PSS can be detected in "symbol 6" of "slot 0" of "subframe 0" and "symbol 6" of "slot 0" of "subframe 5", so that UE1 can locate to 5ms timing and know that the detected PSS is located in the time domain position of "symbol 6" of "slot 0" of "subframe 0" or "subframe 5";

if the UE1 is covered by any one of Beam 2-Beam 5, then the UE1 can detect the PSS on 2 symbols every 5ms transmission period, and these two symbols are centered on either "symbol 6" of "slot 0" of "subframe 0" or "symbol 6" of "slot 0" of "subframe 5", e.g., the UE1 can detect the PSS on "symbol 5" of "slot 0" of "subframe 0" and "symbol 0" of "slot 1" of "subframe 0", respectively, these two symbols are centered on "symbol 6" of "slot 0" of "subframe 0", so that the UE1 can also be positioned to 5ms timing and know which symbol the detected PSS corresponds to. For example, the subframe 0 in fig. 4 is described, where beam2 is the symbol 5 of slot 0(slot 0) and the symbol 0 of slot 1 on the left and right sides of the symbol where beam1 is located; beam3 is located at +/-2 symbols left and right of the symbol position of beam1, namely symbol 4 in slot0 and symbol 1 in slot 1, and so on, which will not be described again.

As shown on the right side of fig. 4, when one wide coverage beam and multiple narrow coverage beams are employed, if UE1 is covered by the wide coverage beam, UE1 can detect the PSS only on one symbol every 5ms of the transmission period, e.g., the PSS can be detected on "symbol 6" of "slot 0" of "subframe 0" and "symbol 6" of "slot 0" of "subframe 5", so that UE1 can locate to 5ms timing and know that the detected PSS is located at "symbol 6" of "slot 0" of "subframe 0" or "subframe 5";

if UE1 is covered by any one of Beam 1-Beam 4, then UE1 may detect the PSS on 2 symbols every 5ms transmission period, and these two symbols are centered on either "symbol 6" of "slot 0" of "subframe 0" or "symbol 6" of "slot 0" of "subframe 5", e.g., UE1 may detect the PSS on "symbol 5" of "slot 0" of "subframe 0" and "symbol 0" of "slot 1" of "subframe 0", respectively, these two symbols are centered on "symbol 6" of "slot 0" of "subframe 0", so that UE1 may also be positioned to 5ms timing and know which symbol the detected PSS corresponds to. For example, it is illustrated as subframe 0 in fig. 4, where beam1 is symbol 5 of slot 0(slot 0) and symbol 0 of slot 1 on the left and right sides of the symbol where the wide coverage beam is located, and so on will not be described again.

It can be seen that, by adopting the above scheme, when determining the symbol resource of each narrow coverage beam, the positions of two corresponding symbol resources in each transmission period or two adjacent transmission periods can be determined by combining the positions of the reference symbol resources. In this way, the terminal side receiving the synchronization signal can determine the symbol where the received narrow coverage beam is located by combining the position of the reference symbol resource and the position difference between the two symbol resources and the reference symbol resource, thereby realizing that the synchronization signal search is completed at least based on the narrow coverage beam.

Example II,

An embodiment of the present invention provides a synchronization signal receiving method, which is applied to a terminal device, and as shown in fig. 5, the synchronization signal receiving method includes:

step 501: determining reference symbol resources in each sending period, wherein the positions of the reference symbol resources in each sending period are the same;

step 502: receiving two adjacent synchronous signals in one sending period or two adjacent sending periods, and acquiring a symbol difference value between the two adjacent synchronous signals;

step 503: and determining the symbol resource position of the narrow coverage beam or the wide coverage beam corresponding to the received synchronization signal based on the position of the reference symbol resource and the symbol difference value between the two adjacent synchronization signals.

Specifically, the PSS and the SSS may both use 5ms as a period, information sent by the PSS is the same each time, information sent by the SSS in two adjacent times is different, and the identification parameter may be obtained by correctly decoding the PSS and the SSS.

The scheme provided by the embodiment is mainly directed to a scene based on a narrow coverage beam, which may include two specific sub-scenes, one is a scene that the narrow coverage beam is used completely, and the other is a scene that the narrow coverage beam and a wide coverage beam are combined. However, for a scenario with only wide coverage beams, for example, when the base station transmits the synchronization signal using a wide coverage beam (wide coverage beam) similar to LTE, the base station may transmit the synchronization signal using the wide coverage beam on the reference symbol resource. If the base station adopts a plurality of narrow beam scanning modes to send the synchronous signals, the same narrow beam is adopted to send on the symbol resource of each sending period; if the base station transmits the synchronous signal by combining the window coverage beam and the multiple narrow coverage beam, the window coverage beam is used for transmitting on the symbol resource of each transmission period, and the multiple narrow coverage beams are used for transmitting on other symbol resources.

Specifically, the present embodiment provides two schemes:

in a first scheme, the receiving two adjacent synchronization signals in one transmission period or two adjacent transmission periods to obtain a symbol difference value between the two adjacent synchronization signals includes: receiving a first synchronization signal from a first transmission period of two adjacent transmission periods, and receiving a second synchronization signal from a second transmission period of the two adjacent transmission periods;

correspondingly, the determining the symbol resource location of the narrow-coverage beam or the wide-coverage beam corresponding to the received synchronization signal based on the location of the reference symbol resource and the symbol difference value between the two adjacent synchronization signals includes:

determining the difference of the symbol resource positions of two adjacent synchronous signals respectively corresponding to two adjacent sending periods based on the symbol difference value between the two adjacent synchronous signals;

dividing the difference between the symbol resource positions of the two adjacent synchronous signals in the two adjacent sending periods by two to obtain the symbol offset corresponding to the synchronous signal;

and respectively determining the positions of the symbol resources for transmitting the narrow-coverage beam or the wide-coverage beam in two adjacent transmission periods based on the positions of the reference symbol resources and the symbol offsets corresponding to the synchronization signals.

Take the example of a wide coverage beam, multiple narrow coverage beams:

For example, referring to fig. 2, the time domain resources occupied by the PSS or SSS are shown as follows:

in fig. 2, taking the transmission scheme based on multiple narrow coverage beams as an example, assuming that the synchronization signal illustrated in the figure is PSS, the wide coverage Beam1 is set to the reference symbol resource, and the position of the reference symbol resource in the scenario shown in fig. 2 is symbol 6 in slot0, correspondingly:

if UE1 is covered by the wide-coverage Beam1, UE1 may detect the PSS at "symbol 6" of "slot 0" of "subframe 0" and "symbol 6" of "slot 0" of "subframe 5", respectively, with a difference of 5ms between the two time instants, so that UE1 may locate to 5ms timing and know that the detected PSS is located at the time domain position of "symbol 6" of "slot 0" of "subframe 0" or "subframe 5";

if UE1 is covered by Beam2, then UE1 can detect PSS at "symbol 5" of "slot 0" of "subframe 0" and "symbol 0" of "slot 1" of "subframe 5", respectively, assuming one symbol length is k, and the two PSS time instants are different by "5 ms +2 k", so that UE1 knows that the first PSS detected is located at the previous symbol of "symbol resource with fixed Beam", i.e., "symbol 5" of "slot 0"; the second PSS detected is located at the next symbol of "symbol resource with fixed beam", i.e. "symbol 0" of "slot 1". So that 5ms timing can be located as well.

Correspondingly, at the terminal device side, the synchronization signals are respectively received at the positions where two symbol resource positions in two adjacent sending periods are received, at this time, the terminal device does not know the resource positions corresponding to the synchronization signals, and can only know the relative position relationship of the two synchronization signals, for example, the relative position relationship can be 5ms + L × k, where L is an integer, k is an integer, and k is used to represent the length of one OFDMA symbol; when the relative symbol difference value between two synchronization signals is known, the difference between the symbol resource positions of two adjacent synchronization signals in two adjacent sending periods, namely the value of L x k, can be easily known based on the calculation formula, and the value is divided by two, namely the symbol offset m; on the basis that the terminal device knows the position x of the reference symbol resource in advance, the position of the symbol resource in the first transmission period can be determined by x + m, and correspondingly, x-m is the position of the symbol resource in the second transmission period.

It should be understood that, by adopting the scheme provided by the embodiment, not only the beam position for transmitting the synchronization signal can be determined, but also the synchronization with the system can be completed.

In a second scheme, the receiving two adjacent synchronization signals in one transmission period or two adjacent transmission periods to obtain a symbol difference value between the two adjacent synchronization signals includes:

receiving a first synchronization signal and a second synchronization signal from a transmission period;

determining the difference of the symbol resource positions of two adjacent synchronous signals in one transmission period based on the symbol difference value between the two adjacent synchronous signals;

dividing the difference of the symbol resource positions of the two adjacent synchronous signals in one sending period by two to obtain the symbol offset corresponding to the synchronous signals;

and determining the position of the symbol resource used for transmitting the narrow-coverage beam or the wide-coverage beam in one transmission period based on the position of the reference symbol resource and the symbol offset corresponding to the synchronization signal.

if UE1 is covered by any one of Beam 2-Beam 5, then UE1 may detect the PSS on 2 symbols every 5ms transmission period, and these two symbols are centered on either "symbol 6" of "slot 0" of "subframe 0" or "symbol 6" of "slot 0" of "subframe 5", e.g., UE1 may detect the PSS on "symbol 5" of "slot 0" of "subframe 0" and "symbol 0" of "slot 1" of "subframe 0", respectively, these two symbols are centered on "symbol 6" of "slot 0" of "subframe 0", so that UE1 may also be positioned to 5ms timing and know which symbol the detected PSS corresponds to. For example, the subframe 0 in fig. 4 is described, where beam2 is the symbol 5 of slot 0(slot 0) and the symbol 0 of slot 1 on the left and right sides of the symbol where beam1 is located; beam3 is located at +/-2 symbols left and right of the symbol position of beam1, namely symbol 4 in slot0 and symbol 1 in slot 1, and so on, which will not be described again.

Fig. 6 shows that, if the scheme of using the wide coverage Beam in the prior art is directly applied to the scheme of multiple narrow coverage beams, if the terminal device is covered by Beam1, the terminal device cannot be located to 5ms timing by the PSS even though the PSS or the SSS is detected, because the terminal device does not know on which symbol the PSS detected by itself is. By adopting the scheme, when the symbol resource of each narrow coverage beam is determined, the positions of the two corresponding symbol resources in each transmission period or two adjacent transmission periods can be determined by combining the positions of the reference symbol resources. In this way, the terminal side receiving the synchronization signal can determine the symbol where the received narrow coverage beam is located by combining the position of the reference symbol resource and the position difference between the two symbol resources and the reference symbol resource, thereby realizing that the synchronization signal search is completed at least based on the narrow coverage beam.

Example III,

An embodiment of the present invention provides a network device, as shown in fig. 7, the network device includes a signal sending unit 71, configured to at least support sending a synchronization signal by using at least one narrow coverage beam;

the network device further includes:

a processing unit 72, configured to determine a reference symbol resource in each transmission period, where the reference symbol resource in each transmission period is located at the same position; determining at least a first symbol resource and a second symbol resource occupied by each narrow-coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource; wherein the first symbol resource and the second symbol resource are located at the same or different positions in respective transmission periods;

accordingly, the signal transmitting unit 71 is configured to transmit the synchronization signal based on the symbol resource corresponding to each narrow coverage beam.

If the base station adopts a plurality of narrow beam scanning modes to send the synchronous signals, the same narrow beam is adopted to send on the symbol resource of each sending period; if the base station transmits the synchronous signal by combining the window coverage beam and the multiple narrow coverage beam, the window coverage beam is used for transmitting on the symbol resource of each transmission period, and the multiple narrow coverage beams are used for transmitting on other symbol resources.

Specifically, the present embodiment provides two schemes:

scenario one, for example, includes only a plurality of narrow coverage beams:

the processing unit 72 is configured to determine, based on the position of the reference symbol resource, at least that a first symbol resource is occupied in a first transmission period of two adjacent transmission periods, and a second symbol resource is occupied in a second transmission period of the two adjacent transmission periods.

a processing unit 72, configured to determine that the wide-coverage beam occupies a reference symbol resource in each transmission period when the network device further supports transmitting a synchronization signal using the wide-coverage beam;

in fig. 2, a Multi-narrow coverage Beam based transmission scheme is taken as an example, assuming that a synchronization signal illustrated in the figure is PSS, a wide coverage Beam1 is set to a reference symbol resource, and the position of the reference symbol resource in the scenario shown in fig. 2 is symbol 6 in slot0, accordingly:

In a second scheme, a scheme for performing transmission of a synchronization signal on symbol resources at different positions of the same narrow coverage beam in the same transmission period is mainly described, where the processing unit 72 is configured to determine, based on the position of the reference symbol resource, at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period.

Specifically, there are two scenarios:

scene one,

The processing unit 72 is configured to determine a symbol offset m corresponding to the identification information of each narrow coverage beam based on a corresponding relationship between the identification information and the symbol offset; m is an integer; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

Scene two,

The processing unit 72 is configured to determine that the wide-coverage beam occupies a reference symbol resource in each transmission period when the network device further supports the use of the wide-coverage beam for transmitting the synchronization signal;

Example four,

An embodiment of the present invention provides a terminal device, as shown in fig. 8, where the terminal device includes:

a processing unit 81, configured to determine a reference symbol resource in each transmission period, where the reference symbol resource in each transmission period is located at the same position; acquiring a symbol difference value between the two adjacent synchronous signals; determining a symbol resource position where a narrow coverage beam or a wide coverage beam corresponding to the received synchronization signal is located based on the position of the reference symbol resource and a symbol difference value between the two adjacent synchronization signals;

the signal receiving unit 82 is configured to receive two adjacent synchronization signals in one transmission period or two adjacent transmission periods.

Specifically, the present embodiment provides two schemes:

in a first aspect, the processing unit 81 is configured to receive a first synchronization signal from a first transmission cycle of two adjacent transmission cycles, and receive a second synchronization signal from a second transmission cycle of the two adjacent transmission cycles;

correspondingly, the processing unit 81 is configured to determine, based on a symbol difference value between two adjacent synchronization signals, a difference between symbol resource positions of the two adjacent synchronization signals respectively corresponding to two adjacent transmission periods;

Take the example of a wide coverage beam, multiple narrow coverage beams:

The second scheme is that the processing unit 81 is configured to receive a first synchronization signal and a second synchronization signal from within one transmission cycle;

The integrated module according to the embodiment of the present invention may also be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as an independent product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product stored in a storage medium, and including several instructions for enabling a computer device (which may be a personal computer, a network device, or a network device) to execute all or part of the methods described in 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. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method for sending a synchronization signal is applied to a network device, and the network device at least supports sending the synchronization signal by adopting at least one narrow coverage beam; characterized in that the method comprises:

2. The method of claim 1, wherein the determining at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource comprises:

3. The method of claim 2, wherein the determining at least that each narrow coverage beam occupies a first symbol resource in a first transmission period of two adjacent transmission periods and occupies a second symbol resource in a second transmission period of the two adjacent transmission periods based on the location of the reference symbol resource comprises:

4. The method of claim 2, wherein the determining at least that each narrow coverage beam occupies a first symbol resource in a first transmission period of two adjacent transmission periods and occupies a second symbol resource in a second transmission period of the two adjacent transmission periods based on the location of the reference symbol resource comprises:

5. The method of claim 1, wherein the determining at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period or two adjacent transmission periods based on the position of the reference symbol resource comprises:

6. The method of claim 5, wherein the determining at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period based on the location of the reference symbol resource comprises:

7. The method of claim 5, wherein the determining at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period based on the location of the reference symbol resource comprises:

8. A synchronization signal receiving method is applied to a terminal device, and is characterized by comprising the following steps:

9. The method of claim 8, wherein the receiving two synchronization signals adjacent in one transmission period or two adjacent transmission periods to obtain a symbol difference between the two adjacent synchronization signals comprises: receiving a first synchronization signal from a first transmission period of two adjacent transmission periods, and receiving a second synchronization signal from a second transmission period of the two adjacent transmission periods;

10. The method of claim 8, wherein the receiving two synchronization signals adjacent in one transmission period or two adjacent transmission periods to obtain a symbol difference between the two adjacent synchronization signals comprises:

11. A network device, the network device comprising, a signal transmitting unit for at least supporting transmitting a synchronization signal using at least one narrow coverage beam;

the network device further includes:

12. The network device of claim 11, wherein the processing unit is configured to determine, based on the position of the reference symbol resource, that at least a first symbol resource is occupied in a first transmission period of two adjacent transmission periods and a second symbol resource is occupied in a second transmission period of the two adjacent transmission periods.

13. The network device according to claim 12, wherein the processing unit is configured to determine a symbol offset m corresponding to the identification information of each narrow coverage beam based on a correspondence relationship between the identification information and the symbol offset; m is an integer; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

14. The network device of claim 12, wherein the processing unit is configured to determine that a wide-coverage beam occupies a reference symbol resource in each transmission period when the network device further supports transmitting a synchronization signal using the wide-coverage beam;

15. The network device of claim 11, wherein the processing unit is configured to determine at least a first symbol resource and a second symbol resource occupied by each narrow coverage beam in each transmission period based on a location of the reference symbol resource.

16. The network device according to claim 15, wherein the processing unit is configured to determine a symbol offset m corresponding to the identification information of each narrow coverage beam based on a correspondence relationship between the identification information and the symbol offset; m is an integer; wherein, the symbol offsets corresponding to different identification information in the corresponding relationship are different;

17. The network device of claim 15, wherein the processing unit is configured to determine that a wide-coverage beam occupies a reference symbol resource in each transmission period when the network device further supports transmitting a synchronization signal using the wide-coverage beam;

18. A terminal device, characterized in that the terminal device comprises:

the processing unit is used for determining the reference symbol resources in each sending period, and the positions of the reference symbol resources in each sending period are the same; acquiring a symbol difference value between two adjacent synchronous signals; determining a symbol resource position where a narrow coverage beam or a wide coverage beam corresponding to the received synchronization signal is located based on the position of the reference symbol resource and a symbol difference value between the two adjacent synchronization signals;

19. The terminal device of claim 18, wherein the processing unit is configured to receive a first synchronization signal from a first transmission period of two adjacent transmission periods, and receive a second synchronization signal from a second transmission period of the two adjacent transmission periods;

20. The terminal device of claim 18, wherein the processing unit is configured to receive a first synchronization signal and a second synchronization signal from within one transmission period;