CN110740515B - Synchronization block configuration method and device for access to backhaul integrated network - Google Patents
Synchronization block configuration method and device for access to backhaul integrated network Download PDFInfo
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- CN110740515B CN110740515B CN201810809072.9A CN201810809072A CN110740515B CN 110740515 B CN110740515 B CN 110740515B CN 201810809072 A CN201810809072 A CN 201810809072A CN 110740515 B CN110740515 B CN 110740515B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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Abstract
The application discloses a method and a device for configuring a synchronization block accessed to a backhaul integrated network, wherein the method comprises the following steps: integrated IAB node N for each access backhaul IAB‑i When accessing to an NR IAB network, acquiring time domain position information of a synchronization block used by other IAB nodes in the current NR IAB network; the IAB node N IAB‑i And according to the time domain position information and the principle of ensuring that at least N available backup backhaul links exist, selecting a time domain position of a synchronization block suitable for the node from a synchronization block time domain position resource pool of the system, and reporting the time domain position to a network side, wherein N is a preset minimum number of backup backhaul links, and is greater than or equal to 1. The invention can ensure that each IAB node in the NR IAB network has an optional backup backhaul link.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a method and an apparatus for configuring a synchronization block accessed to a backhaul integrated network
Background
The relay has small volume and light weight, can be connected with the base station and the core network in a wireless return mode, ensures that the network distribution by adopting the relay is more flexible, is easy to select the site, can reduce the overhead caused by building return optical fibers and equipment rooms, and greatly reduces the cost. Thus, the 3GPP RAN '78 th congress agreed to set up a research project "new air interface (NR) oriented Access Backhaul Integration (IAB)" and held the first discussion at the 3GPP RAN1' 92 th additional conference.
Fig. 1 is a schematic diagram of a typical NR IAB network. The IAB node can perform initial access like a terminal, including cell search and random access, and access to another IAB node or a host node; but from the terminal point of view, the IAB is a base station. The host node is accessed to the core network in a wired return mode. The IAB node is connected with the IAB node through a return link and is finally connected with the core network through the host node. In an IAB network, a backhaul link generally refers to a connection between an IAB node and an IAB node. An access link (access link) refers to a connection between an IAB node and a terminal.
One IAB node needs to monitor the synchronization block of another IAB node for initial access, but also needs to send the synchronization block, so that the other IAB nodes can also perform the initial access process. Due to the half-duplex limitation of the IAB node, the IAB node is not able to transmit and receive synchronization blocks simultaneously.
In the millimeter wave scenario, the backhaul link between IAB nodes is easily blocked, and it is necessary to establish a backup backhaul link. In this way, once the current backhaul link is blocked, the IAB node may switch to the backup backhaul link, connect with other IAB nodes via the backup backhaul link, and finally connect to the core network. As shown in fig. 2, if backhaul link 1 is blocked, backhaul link 3 may serve as a backup link, such that data at IAB node a may first traverse backhaul link 2 to IAB node C, then traverse backup backhaul link 3 to IAB node B, and finally traverse access link 1 to terminal B. If the IAB node B and the IAB node C are in a state of sending or receiving the synchronization blocks at the same time, the backup backhaul link cannot be established between the IAB node B and the IAB node C. Therefore, it is necessary to set the time-frequency position of the synchronization block reasonably, so that the IAB node B may receive the synchronization block sent by the IAB node C when in the receiving state, or the IAB node C may receive the synchronization block sent by the IAB node B when in the receiving state.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for configuring a synchronization block accessed to a backhaul integrated network, which can ensure that each IAB node in an NR IAB network has a backup backhaul link available for selection.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a method for configuring a synchronization block accessed to a backhaul integrated network includes:
each is connected withInbound backhaul integrated IAB node N IAB-i When accessing to an NR IAB network, acquiring time domain position information of a synchronization block used by other IAB nodes in the current NR IAB network;
the IAB node N IAB-i And according to the time domain position information and according to the principle of ensuring that at least N available backup backhaul links exist, selecting a time domain position of a synchronization block suitable for the node from a synchronization block time domain position resource pool of the system, and reporting the time domain position to a network side, wherein N is a preset minimum number of backup backhaul links, and is more than or equal to 1.
Preferably, the time domain position information is a combination of three parameters SSB-periodicityserving cell, n-hf and SSB-positioninburst, where SSB-periodicityserving cell is a transmission period of the synchronization block, n-hf is a half-frame time window occupied by the synchronization block in a frame, and SSB-positioninburst is a time domain transmission position of the synchronization block in the half-frame time window.
Preferably, the selecting, from a synchronization block time domain position resource pool of the system, a time domain position of a synchronization block suitable for use by the node includes:
and selecting one piece of synchronization block time domain position information from a synchronization block time domain position resource pool of the system, wherein the synchronization block time domain position information does not conflict with the synchronization block time domain position information of at least N +1 other IAB nodes.
A synchronization block configuration apparatus for accessing a backhaul integrated network, comprising:
an information acquisition unit for each access backhaul integrated IAB node N IAB-i When accessing to an NR IAB network, acquiring time domain position information of a synchronization block used by other IAB nodes in the current NR IAB network;
a synchronization block setting unit for setting the node N according to the IAB IAB-i And according to the acquired time domain position information, selecting a time domain position of a synchronous block suitable for the node from a synchronous block time domain position resource pool of the system according to a principle of ensuring that at least N available backup backhaul links exist, and reporting the time domain position to a network side, wherein N is a preset minimum number of backup backhaul links, and is more than or equal to 1.
Preferably, the time domain position information is a combination of three parameters SSB-periodicityserving cell, n-hf and SSB-positioninburst, where SSB-periodicityserving cell is a transmission period of the synchronization block, n-hf is a half-frame time window occupied by the synchronization block in a frame, and SSB-positioninburst is a time domain transmission position of the synchronization block in the half-frame time window.
Preferably, the synchronization block setting unit is configured to select a synchronization block time domain location information from a synchronization block time domain location resource pool of the system, where the synchronization block time domain location information does not conflict with synchronization block time domain location information of at least N +1 other IAB nodes.
In summary, in the synchronization block configuration method and apparatus for accessing a backhaul integrated network provided by the present invention, when each IAB node successfully accesses the network, the time domain position of the synchronization block used by the IAB node is set according to the time domain position information of the synchronization block used by each other IAB node in the network and the principle of ensuring that there are at least N available backup backhaul links. Therefore, through reasonable configuration of the time domain position of the synchronous block, each IAB node in the NR IAB network can be ensured to have an optional backup backhaul link, and the transmission reliability of the NR IAB network can be further enhanced.
Drawings
FIG. 1 is a schematic diagram of a typical NR IAB network;
fig. 2 is a schematic diagram of a backup backhaul link;
FIG. 3 is a schematic flow chart of a method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The core idea of the invention is as follows: the synchronization blocks at each IAB node have different transmission positions in the time domain, so that each IAB node in the NR IAB network has at least one backup backhaul link available for selection.
Fig. 3 is a schematic flow chart of a method according to an embodiment of the present invention, and as shown in fig. 3, the method for configuring a synchronization block accessed to a backhaul integrated network implemented by the embodiment mainly includes:
In this step, after each IAB node successfully accesses the network through the initial access process, it needs to obtain the time domain location information of the synchronization block used by each other IAB node that has been accessed in the current NR IAB network, so that in the subsequent steps, the time domain location information of the synchronization block suitable for this node is selected based on these time domain location information, so as to ensure that this node has at least one backup backhaul link that can be selected.
In practical applications, the maximum number of transmissions of the sync blocks is different for different frequency band ranges within a half-frame time window. For example, when the carrier frequency is below 3GHz, the maximum number of transmissions of a sync block is 4 within a half-frame time window; when the carrier frequency is in the range of 3GHz to 6GHz, the maximum transmission number of the synchronous blocks is 8; when the carrier frequency is in the range of 6GHz to 52.6GHz, the maximum number of transmissions of the synchronization block is 64. In addition, the transmission period of the synchronization block can be set to 5ms,10ms,20ms,40ms,80ms,160ms. Therefore, the IAB node can do this from three aspects: the transmission period (which may be set to 5ms,10ms,20ms,40ms,80ms,160ms, but not limited thereto), the field time window (the first field time window or the second field time window), and the time domain transmission position within the field time window.
Therefore, preferably, the time domain position information may be represented as a combination of three parameters SSB-PeriodicityServingCell, n-hf and SSB-positioninginburst, i.e., in the form of (S SB-PeriodicityServingCell, n-hf, SSB-positioninginburst).
Wherein, SSB-periodicityServingCell is the transmission period of the synchronous block, n-hf is the half-frame time window occupied by the synchronous block in a frame, and SSB-PositionsInburst is the time domain transmission position of the synchronous block in the half-frame time window.
For example, when the carrier frequency is in the range of 3GHz to 6GHz, if the time domain transmission position of the synchronization block of a certain IAB node is set to have a transmission period of 20ms, and the time domain transmission position of the synchronization block in the first half frame of a frame and a half frame time window is represented by a bitmap of 01010101, it can be represented as (SSB-periodicityserving cell, n-hf, SSB-Positions in burst) = (20, 0, 01010101). Here, a 1 in the bitmap 01010101 indicates that the time corresponding to the time domain transmission position corresponding to the bit is used for transmission, and a 0 indicates that the transmission or reception is not limited.
In practical application, after the IAB node accesses the network, the time domain location information of the synchronization block used by other IAB nodes that have accessed the NR IAB network may be obtained from the network side host node, or the time domain location information may be obtained by searching other IAB nodes.
And N is a preset minimum number of backup backhaul links, and N is greater than or equal to 1. In practical applications, those skilled in the art can set an appropriate value of N according to actual needs.
In this step, the IAB node N needs to be determined according to the principle of ensuring that there are at least N backup backhaul links available IAB-i The time domain location of the synchronization block is used so that each IAB node accessing the network has a certain number of backup backhaul links available.
Preferably, the following method may be adopted to select the time domain position of the synchronization block suitable for the node to use from the synchronization block time domain position resource pool of the system:
and selecting one piece of synchronization block time domain position information from a synchronization block time domain position resource pool of the system, wherein the synchronization block time domain position information does not conflict with the synchronization block time domain position information of at least N +1 other IAB nodes.
By the selection method, the time domain position information of the synchronous block used by each IAB node does not conflict with the time domain position information of the synchronous blocks used by a certain number of other IAB nodes. Non-collision here means having different transmission positions in the time domain. For example, different transmission periods, or within different half-frame time windows in a frame, or different time-domain transmission positions within a half-frame time window, ensure that each IAB node in the NR IAB network has a certain number of alternative backup backhaul links. By way of example, whether two IAB nodes collide with respect to the synchronization block time domain location information is explained in detail below.
For example, when the carrier frequency is below 3GHz, assuming that there are two IAB nodes in the current NR IAB network and the time domain location information of the synchronization block is (10, 0, 1000) and (10, 0, 0100), respectively, the time domain location information of the synchronization block of the IAB node newly accessing the NR IAB network may be set to (10, 1, 1100). It can be seen that (10, 1, 1100) and (10, 0, 1000) are in different half-frame time windows, and thus, the two sync block temporal location information do not collide, and likewise, (10, 1, 1100) and (10, 0, 0100) are also in different half-frame time windows, and thus, the two sync block temporal location information do not collide. In this way, the IAB node can establish a backhaul link with both of the IAB nodes in the NR IAB network. If the time domain position information of the synchronization block of the IAB node newly accessing the NR IAB network is set to (10, 0, 0101), the transmission periods of (10, 0, 0101) and (10, 0, 0100) are the same, the half-frame time window is the same, and the time corresponding to the time domain transmission position corresponding to the 2 nd bit in the half-frame time window is used for transmission, so that the time domain transmission positions of the two collide, and the time domain transmission positions of (10, 0, 0101) and (10, 0, 1000) in the half-frame time window do not collide, so that a backhaul link can be established between the two. Thus, when the time domain position information of the synchronization block is set to (10, 0, 0101), a backhaul link can be established with only one of the nodes.
Here, when IAB node N IAB-i After the time domain position of the synchronization block used by the node is selected, the convenience is brought toThe network side grasps the time domain position information of the synchronous block used by each accessed IAB node in real time so as to enable the subsequently accessed IAB nodes to realize the reasonable setting of the time domain position of the synchronous block based on the method, each IAB node in the NR IAB network is ensured to have at least one backup return link number which can be selected, and the IAB node N IAB-i The time domain location information of the selected synchronization block needs to be reported to the network side.
Fig. 4 is a structural diagram of a synchronization block configuration apparatus accessing to a backhaul integrated network corresponding to the method described above, and as shown in fig. 4, the apparatus includes:
an information acquisition unit for each access backhaul integrated IAB node N IAB-i When accessing to an NR IAB network, acquiring time domain position information of a synchronization block used by other IAB nodes in the current NR IAB network;
a synchronization block setting unit for node N based on IAB IAB-i And according to the obtained time domain position information, selecting a time domain position of a synchronous block suitable for the node from a synchronous block time domain position resource pool of a system according to a principle of ensuring that at least N available backup backhaul links exist, and reporting the time domain position to a network side, wherein N is a preset minimum number of backup backhaul links, and is more than or equal to 1.
Preferably, the time domain position information is a combination of three parameters SSB-periodicityserving cell, n-hf and SSB-positioninburst, where SSB-periodicityserving cell is a transmission period of the synchronization block, n-hf is a half-frame time window occupied by the synchronization block in a frame, and SSB-positioninburst is a time domain transmission position of the synchronization block in the half-frame time window.
Preferably, the synchronization block setting unit is configured to select one synchronization block time domain location information from a synchronization block time domain location resource pool of the system, where the synchronization block time domain location information does not conflict with synchronization block time domain location information of at least N +1 other IAB nodes.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for configuring a synchronization block accessed to a backhaul integrated network, comprising:
integrated IAB node N for each access backhaul IAB-i When accessing to an NR IAB network, acquiring time domain position information of a synchronization block used by other IAB nodes in the current NR IAB network;
the IAB node N IAB-i And according to the time domain position information and according to the principle of ensuring that at least N available backup backhaul links exist, selecting a time domain position of a synchronization block suitable for the node from a synchronization block time domain position resource pool of the system, and reporting the time domain position to a network side, wherein N is a preset minimum number of backup backhaul links, and is more than or equal to 1.
2. The method of claim 1, wherein the time-domain position information is a combination of three parameters SSB-periodicityserving cell, n-hf and SSB-positioninburst, where SSB-periodicityserving cell is a transmission period of the sync block, n-hf is a half-frame time window occupied by the sync block in a frame, and SSB-positioninburst is a time-domain transmission position of the sync block in the half-frame time window.
3. The method according to claim 1, wherein the selecting, from a synchronization block time domain position resource pool of a system, a time domain position of a synchronization block suitable for use by the node comprises:
and selecting one piece of synchronization block time domain position information from a synchronization block time domain position resource pool of the system, wherein the synchronization block time domain position information does not conflict with the synchronization block time domain position information of at least N +1 other IAB nodes.
4. A synchronization block configuration apparatus for accessing a backhaul integrated network, comprising:
an information acquisition unit for each access backhaul integrated IAB node N IAB-i On access to NR IAB networkAcquiring time domain position information of synchronization blocks used by other IAB nodes in the current NR IAB network;
a synchronization block setting unit for node N based on IAB IAB-i And according to the acquired time domain position information, selecting a time domain position of a synchronous block suitable for the node from a synchronous block time domain position resource pool of the system according to a principle of ensuring that at least N available backup backhaul links exist, and reporting the time domain position to a network side, wherein N is a preset minimum number of backup backhaul links, and is more than or equal to 1.
5. The apparatus of claim 4, wherein the time-domain position information is a combination of three parameters, SSB-periodicityServingCell, n-hf and SSB-PositionInBurst, and wherein SSB-periodicityServingCell is a transmission period of the synchronization block, n-hf is a half-frame time window occupied by the synchronization block in a frame, and SSB-PositionInBurst is a time-domain transmission position of the synchronization block within the half-frame time window.
6. The apparatus of claim 4, wherein the synchronization block setting unit is configured to select a synchronization block time domain position information from a synchronization block time domain position resource pool of the system, where the synchronization block time domain position information does not conflict with synchronization block time domain position information of at least N +1 other IAB nodes.
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| CN107736004A (en) * | 2015-06-30 | 2018-02-23 | 高通股份有限公司 | Traffic stream migration in backhaul network |
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| CN107736004A (en) * | 2015-06-30 | 2018-02-23 | 高通股份有限公司 | Traffic stream migration in backhaul network |
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| Title |
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| IAB Network Topology and Route Selection;CATT;《3GPP TSG-RAN WG3-AH-1801 R3-180832》;20180213;全文 * |
| Necessary Enhancements for NR IAB;Samsung;《3GPP TSG RAN WG1 Meeting #92bis R1-1804406》;20180406;全文 * |
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