CN111147200A - Reference signal sending method and device - Google Patents

Reference signal sending method and device Download PDF

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Publication number
CN111147200A
CN111147200A CN201811299329.7A CN201811299329A CN111147200A CN 111147200 A CN111147200 A CN 111147200A CN 201811299329 A CN201811299329 A CN 201811299329A CN 111147200 A CN111147200 A CN 111147200A
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ssb
relay node
signal
hop
node
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CN111147200B (en
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焦慧颖
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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Priority to PCT/CN2019/078681 priority patent/WO2020087839A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a method and a device for sending a reference signal, wherein the method comprises the following steps: determining the time position of periodically sending the SSB signals of the synchronization sequence block according to the hop count of the relay node; transmitting an SSB signal using a different SSB block at the same time location as the first node; the first node is a relay node with the same hop count as the relay node. The method avoids the interference of the transmitting and receiving signals by ensuring the orthogonality of the SSB signals transmitted by the relay node.

Description

Reference signal sending method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a reference signal.
Background
Supporting wireless backhaul relay links enables more flexible and dense cell deployment. Due to the fact that the bandwidth provided by a future mobile communication system is larger, and meanwhile a large-scale MIMO or multi-beam system can be deployed, opportunities are provided for deploying uniformly designed access and return links, and intensive network deployment is made to be simpler and easier.
The relay node may multiplex the access and backhaul links in time, frequency, or space. The access and backhaul links may be on the same frequency band or on different frequency bands, requiring more compact interoperation to configure duplex restrictions to avoid interference when the access and backhaul links are on the same frequency.
In the discovery process of the relay node, one relay node needs to detect a reference signal, i.e., a Synchronization Sequence Block (SSB) signal, to discover a new relay node, and meanwhile, needs to send a reference signal to other relay nodes to discover the relay node. Limited by the duplex limitation, the relay node cannot receive and transmit the reference signal at the same time. The transceiving relation of the relay node to the reference signal is well coordinated.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for transmitting a reference signal, which avoid interference of a transmission and reception signal by ensuring orthogonality of an SSB signal transmitted by a relay node.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a method for sending a reference signal is applied to any relay node, and comprises the following steps:
determining the time position of periodically sending the SSB signals of the synchronization sequence block according to the hop count of the relay node;
transmitting an SSB signal using a different SSB block at the same time location as the first node; the first node is a relay node with the same hop count as the relay node.
A reference signal transmitting device is applied to any relay node, and the device comprises: a determining unit and a transmitting unit;
the determining unit is configured to determine a time position for periodically sending a synchronization sequence block SSB signal according to the hop count of the relay node;
the sending unit is used for sending SSB signals on different SSB blocks at the same time position determined by the sending unit as the first node; the first node is a relay node with the same hop count as the relay node.
According to the technical scheme, the relay node determines the time position of the SSB signal of the periodically transmitted synchronization sequence block according to the hop count of the relay node; and the SSB blocks of the SSB signals sent by the relay nodes with the same hop number are different. The scheme ensures the orthogonality of the SSB signals transmitted by the relay node so as to avoid the interference of the transmitting and receiving signals.
Drawings
Fig. 1 is a schematic diagram illustrating a transmission flow of a reference signal in an embodiment of the present application;
fig. 2 is a schematic position diagram of a 4-hop relay node sending an SSB signal in a basic period in the embodiment of the present application;
fig. 3 is a schematic position diagram of a 4-hop relay node sending an SSB signal in a 3-fold basic period in the embodiment of the present application;
FIG. 4 is a diagram illustrating SSB signals sent on different SSB blocks at the same time location in an embodiment of the present application;
fig. 5 is a schematic structural diagram of an apparatus applied to the above-described technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a method for sending a reference signal, which is applied to any relay node, wherein the relay node determines the time position for periodically sending an SSB signal of a synchronization sequence block according to the hop count of the relay node; and the SSB blocks of the SSB signals sent by the relay nodes with the same hop number are different. The scheme ensures the orthogonality of the SSB signals transmitted by the relay node so as to avoid the interference of the transmitting and receiving signals.
In the embodiment of the present application, when determining the hop count of the relay node and determining the position for sending the SSB signal, there are two implementation manners, which are specifically as follows:
a first one; the method is realized by detecting SSB signals sent by other relay nodes, and specifically comprises the following steps:
determining the periodic time position of the SSB signal sent by the previous hop relay node by detecting the SSB signal sent by the previous hop relay node;
and determining the hop count of the previous-hop relay node according to the periodic time position of the previous-hop relay node for sending the SSB signal, and further determining the hop count of the relay node.
Determining the periodic time position of the SSB signal corresponding to the hop number of the relay node according to the configuration information;
sending an SSB signal by using the unoccupied SSB block by detecting the condition that the SSB block at the periodic time position is occupied; or, the SSB block is randomly selected at the determined periodic time position to send the SSB signal.
And the second method comprises the following steps: the implementation of the common control signaling and the dedicated signaling sent by the network device is specifically as follows:
the network equipment sends a public control signaling and a special signaling to the relay node; wherein, the common control signaling carries the hop count of each relay node; the common control signaling carries the time position of each hop of relay node for periodically sending an SSB signal; the dedicated signaling carries orthogonal spreading code information.
A relay point receives a public control signaling sent by network equipment; determining the hop count of the relay node according to the received common control signaling; and determining the time position of each hop of relay node for periodically sending the SSB signal according to the received common control signaling.
The relay node receives a special signaling sent by the network equipment; and determining the position of the SSB block of the SSB signal sent by the relay node with the same hop count as the node according to the special signaling.
And when the network equipment sends the common signaling, the common signaling is sent periodically, or when the hop count of the relay node changes.
The following describes in detail a transmission process of a reference signal in an embodiment of the present application with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a transmission flow of a reference signal in an embodiment of the present application. The method comprises the following specific steps:
step 101, the relay node determines the time position of periodically sending the SSB signal of the synchronization sequence block according to the hop count of the relay node.
Referring to fig. 2, fig. 2 is a schematic position diagram of a 4-hop relay node sending an SSB signal in a basic period in the embodiment of the present application.
In fig. 2, a cycle of 20ms is used, in each cycle, a first time position is used for a relay node (1st hop RN) with hop count of 1 to transmit an SSB signal, and a second time position is used for a relay node (2st hop RN) with hop count of 2 to transmit an SSB signal; the third time position is used for the relay node (3st hopRN) with the hop count of 3 to send the SSB signal; the fourth time position is for the relay node with hop count 4 (4st hop RN) to send the SSB signal.
Referring to fig. 3, fig. 3 is a schematic position diagram of a 4-hop relay node sending an SSB signal in a 3-fold basic period in the embodiment of the present application.
In fig. 3, a cycle of 60ms is used, in each cycle, the first time position is used for the relay node with the hop count of 1 (1st hop RN) to transmit the SSB signal, and the fourth time position is used for the relay node with the hop count of 2 (2st hop RN) to transmit the SSB signal; the seventh time position is used for the relay node (3st hopRN) with the hop count of 3 to send the SSB signal; the 10 th time position is for the relay node with hop count 4 (4st hop RN) to transmit the SSB signal.
102, the relay node sends SSB signals on different SSB blocks at the same time position with the first node; the first node is a relay node with the same hop count as the relay node.
Referring to fig. 4 and fig. 4, schematic diagrams of SSB signals sent on different SSB blocks at the same time position in the embodiment of the present application are shown. Fig. 4 takes the first-hop relay node in fig. 1 as an example to select the SSB block at the first time position of the third period, and assuming that the number of nodes of the relay node at the first hop is 4, the nodes are RN1, RN2, RN3, and RN4, respectively.
From left to right, two sets of reference numbers are used for SSB blocks at the first temporal location of the third period, which are respectively: a first group and a second group.
RN1 selects a first group of SSB blocks with the numbers of 2 and 3 to transmit SSB signals, and RN2 selects a first group of SSB blocks with the numbers of 4 and 5 to transmit SSB signals; the RN3 selects the SSB signal sent by the second set of SSB blocks numbered 1 and 2; RN4 selects the second set of SSB blocks labeled 3 and 4 to transmit the SSB signal.
By the implementation, the orthogonality of the SSB signals can be ensured, and further, the interference is avoided.
The specific implementation of the relay node sending the SSB signal on a different SSB block at the same time position as the first node may be:
using a different spreading code word than the first node for selecting a location of an SSB block in a time location in which the SSB signal is transmitted.
As in fig. 4, the number of first hop relay nodes is 4, each relay node selects a different spreading code word, RN1 selects [1000], and transmits only on SSB block 1, RN2 selects [0100], and transmits only on SSB block 2, RN3 selects [0010], and transmits only on SSB block 3, and RN4 selects [0001], and transmits only on SSB block 4.
A specific implementation of implementing orthogonality is given above, and the way of implementing orthogonality is not limited to the implementation given above.
The relay node uses SSB blocks at different positions in different sending periods, or the SSB blocks at the same position send SSB signals.
And the relay nodes with the same hop count use SSB blocks with different positions to transmit SSB signals in different transmission periods. When the relay node transmits the SSB signal using the SSB blocks at different positions in different transmission periods, a hierarchical characteristic can be obtained.
Fig. 4 shows an SSB block diagram of SSB signals transmitted by four relay nodes at the first time position in the third period. If the SSB signal of RN3 can be transmitted on the SSB block of RN1 at the first time position of the third period, the SSB signal of RN4 can be transmitted on the SSB block of RN 2; the SSB signal of RN1 may be transmitted on the SSB block transmitting RN 3; the SSB signal of RN2 may be transmitted on the SSB block of RN 4.
This is merely an example, and the specific implementation is not limited to the above implementation, as long as it is ensured that the SSB signals are transmitted using different SSB blocks in different transmission periods.
Based on the same inventive concept, the embodiment of the present application further provides a device for sending a reference signal, which is applied to any relay node. Referring to fig. 5, fig. 5 is a schematic structural diagram of an apparatus applied to the above technology in the embodiment of the present application. The device includes: a determination unit 501 and a transmission unit 502;
a determining unit 501, configured to determine a time position of periodically sending a synchronization sequence block SSB signal according to the hop count of the relay node;
a sending unit 502, configured to send an SSB signal using a different SSB block at the same time location determined by the sending unit 502 as the first node; the first node is a relay node with the same hop count as the relay node.
Preferably, the first and second liquid crystal films are made of a polymer,
a determining unit 501, further configured to use a different spreading code word than the first node, for selecting a position of an SSB block in a time position in which the SSB signal is transmitted;
the sending unit 502 is further configured to send SSB signals using SSB blocks in different positions in different sending periods.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
In summary, the time position of periodically sending the SSB signal of the synchronization sequence block is determined by the relay node according to the hop count of the relay node; and the SSB blocks of the SSB signals sent by the relay nodes with the same hop number are different. The scheme ensures the orthogonality of the SSB signals transmitted by the relay node so as to avoid the interference of the transmitting and receiving signals.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A method for sending a reference signal is applied to any relay node, and is characterized by comprising the following steps:
determining the time position of periodically sending the SSB signals of the synchronization sequence block according to the hop count of the relay node;
transmitting an SSB signal using a different SSB block at the same time location as the first node; the first node is a relay node with the same hop count as the relay node.
2. The method of claim 1,
using a different spreading code word than the first node for selecting a location of an SSB block in a time location in which the SSB signal is transmitted.
3. The method of claim 1,
the SSB signals are transmitted using different SSB blocks, or the same SSB block, for different transmission periods.
4. The method according to any of claims 1-3, wherein determining the hop count of the relay node comprises:
determining the periodic time position of the SSB signal sent by the previous hop relay node by detecting the SSB signal sent by the previous hop relay node;
and determining the hop count of the previous-hop relay node according to the periodic time position of the previous-hop relay node for sending the SSB signal, and further determining the hop count of the relay node.
5. The method of claim 4, further comprising:
determining the periodic time position of the SSB signal corresponding to the hop number of the relay node according to the configuration information;
sending an SSB signal by using the unoccupied SSB block by detecting the condition that the SSB block at the periodic time position is occupied; or, the SSB block is randomly selected at the determined periodic time position to send the SSB signal.
6. The method according to any of claims 1-3, wherein determining the hop count of the relay node comprises:
receiving a common control signaling sent by network equipment; wherein, the common control signaling carries the hop count of each relay node;
and determining the hop count of the relay node according to the received common control signaling.
7. The method of claim 6, further comprising:
determining the time position of each hop of relay node for periodically sending an SSB signal according to the received common control signaling; the common control signaling carries the time position of each hop of relay node for periodically sending an SSB signal;
receiving a special signaling sent by network equipment; wherein the dedicated signaling carries orthogonal spreading code information.
And determining the position of the SSB block of the SSB signal sent by the relay node with the same hop count as the node according to the special signaling.
8. The method of claim 6, wherein the common signaling is sent periodically or when the hop count of a relay node changes.
9. An apparatus for transmitting a reference signal, applied to any relay node, the apparatus comprising: a determining unit and a transmitting unit;
the determining unit is configured to determine a time position for periodically sending a synchronization sequence block SSB signal according to the hop count of the relay node;
the sending unit is used for sending SSB signals on different SSB blocks at the same time position determined by the sending unit as the first node; the first node is a relay node with the same hop count as the relay node.
10. The apparatus of claim 9,
the determining unit is further configured to select a position of an SSB block in a time position in which the SSB signal is transmitted, using a different spreading code word than the first node;
the sending unit is further configured to send the SSB signal using different SSB blocks in different sending periods, or using the same SSB block.
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CN201811299329.7A CN111147200B (en) 2018-11-02 2018-11-02 Reference signal sending method and device
PCT/CN2019/078681 WO2020087839A1 (en) 2018-11-02 2019-03-19 Method for sending reference signals, apparatus, and storage medium

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