CN113840389B - Method for determining random access resource and self-returning IAB node - Google Patents

Method for determining random access resource and self-returning IAB node Download PDF

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CN113840389B
CN113840389B CN202010581098.XA CN202010581098A CN113840389B CN 113840389 B CN113840389 B CN 113840389B CN 202010581098 A CN202010581098 A CN 202010581098A CN 113840389 B CN113840389 B CN 113840389B
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random access
access resource
iab node
accessed
determining
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CN113840389A (en
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刘进华
王欢
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to PCT/CN2021/101059 priority patent/WO2021259174A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

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

Abstract

The application discloses a method for determining random access resources and a self-returning IAB node, belonging to the field of communication. The method for determining the random access resource comprises the following steps: under the condition that a father IAB node of the IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining target random access resources from the plurality of random access resources; the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node to be accessed currently. According to the embodiment of the application, through the target random access resource which is used for accessing the father IAB node and is available or can be used preferentially in advance, the probability of success of random access of the IAB node to be accessed and the use efficiency of the random access resource can be improved, and the time delay of the random access process can be reduced.

Description

Method for determining random access resource and self-returning IAB node
Technical Field
The present application relates to the field of communications, and in particular, to a method for determining a random access resource and a self-backhaul IAB node.
Background
Currently, in a New air interface (NR) system, a self-backhaul (Integrated AccessBackhaul, IAB) may provide extended coverage for an NR cell, or may provide capacity enhancement for an NR cell, where an access node supporting wireless access of a User Equipment (UE, also referred to as a terminal Equipment) and wirelessly backhaul data is referred to as an IAB node (IAB node, IABN). While an access node that provides a radio backhaul function for an IAB node to connect a UE to a Core network (Core Net, CN) is referred to as a host IAB node (IAB-donornode), between which a wired transmission is performed. The data of the UE is transmitted between the UE and the access node through a wireless access link (ACCESS LINK), and the data of the UE can be transmitted between the access nodes through a wireless backhaul link.
In an IAB network architecture supporting a Centralized Unit (CU)/Distributed Unit (DU) split deployment, one IAB Node (IABN) includes a DU function module and a mobile terminal (Mobile Termination, MT) function module. By means of the MT function, a node to be accessed (i.e., IABN) can find an upstream access node (i.e., parent IAB node Parent IABN, P-IABN) and establish a wireless backhaul link with the DU of the upstream access node. After an IAB node establishes a complete backhaul link, the IAB node opens its DU function, where the DU may provide cell service, i.e. the DU may provide access service for the UE. Wherein a self-backhaul loop contains a host IAB node, and all the DUs of the IAB nodes in the self-backhaul loop may be connected to a CU node, i.e. the CU function module of the host IAB node.
Accordingly, in carrying out the present application, the inventors have found that there are at least the following problems in the prior art: at present, no selection mechanism for random access resources of a parent IAB node selected by the IAB node to be accessed is provided for the IAB node to be accessed, so that probability of success of random access of the IAB node, the quantity of the IAB random access resources required to be configured, time delay of a random access process and the like are affected.
Disclosure of Invention
The embodiment of the application aims to provide a method for determining random access resources and a self-returning IAB node, so as to solve the problem that the IAB node to be accessed has no mechanism for selecting the random access resources of a parent IAB node selected by the IAB node to be accessed in the prior art.
In a first aspect, an embodiment of the present application provides a method for determining a random access resource, which is applied to an IAB node, where the method includes:
Under the condition that a father IAB node of the IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining target random access resources from the plurality of random access resources; the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node to be accessed currently.
In a second aspect, an embodiment of the present application provides a self-backhaul IAB node, including:
A determining module, configured to determine a target random access resource from a plurality of random access resources when a parent IAB node of an IAB node to be accessed is simultaneously configured with the plurality of random access resources; the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node to be accessed currently.
In a third aspect, an embodiment of the present application provides a self-backhaul IAB node, including: a memory, a processor and a program or instruction stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method as described in the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which when executed by a processor perform the steps of the method according to the first aspect.
In the embodiment of the application, when the father IAB node selected by the IAB node to be accessed is simultaneously configured with a plurality of random access resources, the IAB node to be accessed can firstly select from the plurality of random access resources before accessing the father IAB node so as to determine the target random access resources available or preferentially used in the first random access process of the father IAB node to be accessed currently. In this way, through the target random access resource which is explicitly available in advance or can be used preferentially and is used for accessing the father IAB node, the probability of success of random access of the IAB node to be accessed, the use efficiency of the random access resource can be improved, and the time delay of the random access process can be reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a flow chart of a method for determining a random access resource according to an embodiment of the present application;
Fig. 2 is a flow chart illustrating a method for determining a random access resource based on a distance according to an embodiment of the present application;
Fig. 3 is a flowchart of a method for determining a random access resource based on a type of an MT function module of an IAB node to be accessed according to an embodiment of the present application;
fig. 4 is a flowchart of a method for determining a random access resource based on a history of access results of an IAB node to be accessed to a parent IAB node in an embodiment of the present application;
Fig. 5 is a flow chart illustrating a method for determining a random access resource based on a length of a PRACH preamble in an embodiment of the present application;
fig. 6 is a schematic diagram of a self-backhaul IAB node according to an embodiment of the present application;
fig. 7 is a schematic diagram of another self-backhaul IAB node according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application may be practiced otherwise than as specifically illustrated or described herein. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The technical scheme of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), general Packet Radio Service (GPRS) GENERAL PACKET Radio Service, long Term evolution/enhanced Long Term evolution (Long Term EvolutionAdvanced, LTE-a), NR, etc.
The user equipment UE, which may also be referred to as a Terminal equipment (Mobile Terminal), a Mobile user equipment, etc., may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), and the user equipment may be Terminal equipment, such as Mobile phones (or "cellular" phones) and computers with Terminal equipment, for example, portable, pocket, hand-held, computer-built-in or vehicle-mounted Mobile devices, which exchange voice and/or data with the radio access network.
The network device, which may be referred to as a base station, may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in WCDMA, an evolved base station (evolutional Node B, eNB or e-NodeB) in LTE, or a 5G base station (gNB).
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present application provides a method for determining a random access resource, which is performed by a self-backhaul IAB node, and includes the following steps:
Step 101: under the condition that a father IAB node of the IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining target random access resources from the plurality of random access resources; the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node to be accessed currently.
In the embodiment of the application, when the father IAB node selected by the IAB node to be accessed is simultaneously configured with a plurality of random access resources, the IAB node to be accessed can firstly select from the plurality of random access resources before accessing the father IAB node so as to determine the target random access resources available or preferentially used in the first random access process of the father IAB node to be accessed currently. In this way, through the target random access resource which is explicitly available in advance or can be used preferentially and is used for accessing the father IAB node, the probability of success of random access of the IAB node to be accessed, the use efficiency of the random access resource can be improved, and the time delay of the random access process can be reduced.
Optionally, the parent IAB node selected by the IAB node to be accessed is configured with multiple random access resources at the same time, including but not limited to general random access resources (for example, random access resources configured by the rach-ConfigCommon parameter in 3GPP TS 38.331v16.0.0) and random access resources dedicated to the MT function module of the IAB node mobile terminal (for example, random access resources configured by the rach-ConfigCommonIAB parameter in 3GPP TS 38.331v16.0.0); further optionally, the number of general Random access resources (the number of the Random access resources dedicated to the IAB node MT function module may be one or more) may be one or more.
Alternatively, the parent IAB node selected by the IAB node to be accessed may include an IAB-donor node.
Optionally, in the method for determining a random access resource according to the embodiment of the present application, in the step 101, determining a target random access resource from the multiple random access resources may be implemented in different manners, so as to ensure that the target random access resource may be accurately and smoothly needed. The manner of determining the target random access resource from the plurality of random access resources includes, but is not limited to, what is described in the following specific embodiments.
Detailed description of the preferred embodiments
In a first embodiment, the determining, in the step 101, the target random access resource from the plurality of random access resources is optionally:
and determining the target random access resource based on the distance between the IAB node to be accessed and the father IAB node.
It may be understood that, considering that the requirements of the self-backhaul paths with different transmission distances on wireless transmission are different, in order to improve the probability of the to-be-accessed IAB node accessing the parent IAB node, the target random access resource available or preferentially used by the access IAB node in the first random access process of accessing the parent IAB node may be selected based on the distance between the to-be-accessed IAB node and the parent IAB node.
Further optionally, the step of determining the target random access resource based on the distance between the to-be-accessed IAB node and the parent IAB node may specifically refer to fig. 2, and includes the following steps:
Step 201, determining whether the distance between the to-be-accessed IAB node and the parent IAB node is smaller than a preset distance threshold, if yes, executing step 203, otherwise executing step 205.
Step 203, determining a second random access resource in the plurality of random access resources as the target random access resource; wherein the second random access resource is a universal random access resource.
It may be understood that when the distance between the to-be-accessed IAB node and the parent IAB node is short, the universal random access resource may be used as a random access resource available or preferentially used in the first random access procedure of accessing the parent IAB node.
Step 205, determining a third random access resource in the plurality of random access resources as the target random access resource; wherein, the third random access resource is a random access resource special for the IAB node MT function module.
It can be understood that when the distance between the to-be-accessed IAB node and the parent IAB node is far, the random access resource dedicated for the IAB node MT function module can be used as the random access resource available or preferentially used in the first random access process of accessing the parent IAB node.
Further optionally, in this embodiment one, it may be determined in different manners whether the distance between the to-be-accessed IAB node and the parent IAB node is smaller than a corresponding preset distance threshold, including but not limited to at least one of the following specific manners:
Mode one: determining that the distance between the to-be-accessed IAB node and the father IAB node is smaller than the preset distance threshold under the condition that at least one of the following conditions is met:
the IAB node to be accessed measures that the path loss of the father IAB node is smaller than a preset path loss threshold; and the quality of the wireless signal from the father IAB node measured by the IAB node to be accessed is higher than a preset signal quality threshold.
It may be understood that, specifically, whether the distance between the to-be-accessed IAB node and the parent IAB node satisfies the condition of selecting the universal random access resource as the random access resource available or preferentially used in the current first random access procedure of the to-be-accessed IAB node to access the parent IAB node may be measured according to at least one of the path loss of the parent IAB node measured by the to-be-accessed IAB node and the quality of the wireless signal from the parent IAB node measured by the to-be-accessed IAB node. The smaller the path loss measured by the to-be-accessed IAB node to the father IAB node and/or the higher the quality of the wireless signal from the father IAB node measured by the to-be-accessed IAB node, the more suitable the distance between the to-be-accessed IAB node and the father IAB node is for taking the universal random access resource as the condition of the random access resource available or preferentially used in the current first random access process of the to-be-accessed IAB node to the father IAB node.
Further alternatively, the Quality of the radio Signal from the parent IAB node measured by the IAB node may be measured by reference Signal received Power (REFERENCE SIGNAL RECEIVED Power, RSRP), received Signal strength Indication (RECEIVED SIGNAL STRENGTH Indication, RSSI), reference Signal received Quality (REFERENCE SIGNAL RECEIVED Quality, RSRQ), signal to noise ratio (Signal Noise Ratio, SNR), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR), signal to interference plus noise ratio (Signal-to-InterferenceRatio, SIR), and the like. Optionally, the IAB node to be accessed may measure the parameters of radio quality through a physical layer reference signal, for example, at least one of a Synchronization signal block (Synchronization SIGNAL AND PBCH block, SSB), a physical downlink shared channel (Physical downlink SHARED CHANNEL, PDSCH), and a channel state Information (CHANNEL STATE Information, CSI) reference signal (CSI REFERENCE SIGNAL, CSI-RS).
Mode two: firstly, determining the distance between an IAB node to be accessed and a father IAB node, and further comparing the determined distance with a preset distance threshold. The step of determining the distance between the to-be-accessed IAB node and the parent IAB node may be specifically performed as follows:
And determining the distance between the IAB node to be accessed and the father IAB node based on the position information of the IAB node to be accessed and the position information of the father IAB node.
It can be understood that, specifically, the distance between the two may be determined accurately according to the position information of the to-be-accessed IAB node and the position information of the parent IAB node, so that whether the determined distance intuitively measures whether the determined distance satisfies the condition of using the universal random access resource as the random access resource available or preferentially used in the current first random access process of accessing the to-be-accessed IAB node to the parent IAB node.
The location information of the to-be-accessed IAB node and the location information of the parent IAB node may include, but are not limited to, location information of a macro base station previously stored in the corresponding IAB node.
Optionally, in this embodiment one, at least one of the above-mentioned preset distance threshold and the preset signal quality threshold is configured by the centralized unit CU. Further optionally, the configuration is by a system message configuration or by an operation and maintenance management (Operation Administration AND MAINTENANCE, OAM) message configuration.
Second embodiment
In the second embodiment, the method for determining the target random access resource from the plurality of random access resources in step 101 is optionally:
and determining the target random access resource based on the type of the MT functional module of the IAB node to be accessed.
It may be understood that, considering that the type of the MT function of the mobile terminal of the IAB node is related to the distance between the IAB node and its parent IAB node, the target random access resource available or preferentially used by the access IAB node in the first random access procedure of accessing the parent IAB node may be selected based on the type of the MT function of the IAB node to be accessed.
The type of MT functional module is that the IAB node of wide-area MT is farthest from the father IAB node, the type of MT functional module is that the IAB node of local area MT (local-areaMT) is closest to the father IAB node, and the type of MT functional module is that the IAB node of medium-range MT is centered from the father IAB node.
Further optionally, the step of determining the target random access resource based on the type of the mobile terminal MT function module of the IAB node to be accessed may specifically refer to fig. 3, and includes the following steps:
Step 301, determining the type of the MT function module of the IAB node to be accessed.
Step 303, if the type of the MT functional module of the IAB node to be accessed is a local MT, determining a fourth random access resource among the multiple random access resources as the target random access resource; wherein the fourth random access resource is a universal random access resource.
Step 305, if the type of the MT function module of the IAB node to be accessed is a wide area MT, determining a fifth random access resource among the multiple random access resources as the target random access resource; wherein, the fifth random access resource is a random access resource special for the IAB node MT function module.
Step 307, if the type of the MT function module of the IAB node to be accessed is a middle domain MT, determining a sixth random access resource from the multiple random access resources as the target random access resource; the sixth random access resource is a general random access resource or a random access resource special for an IAB node MT functional module.
Further optionally, the sixth random access resource includes one of:
(a) And determining random access resources based on the judgment of the node to be accessed. That is, when the type of the MT function module of the IAB node to be accessed is a medium domain MT, the IAB node to be accessed may determine to select the target random access resource available or preferentially used in the first random access procedure of accessing the parent IAB node.
(B) The earliest available random access resource. That is, when the type of MT function module to be accessed to the IAB node is a medium domain MT, the earliest available random access resource may be selected as a target random access resource available or preferentially used in the first random access procedure of accessing the parent IAB node.
It should be noted that, when the MT function module of the IAB node to be accessed is a medium domain MT, in addition to the two modes (a) and (b), the IAB node to be accessed may also select, according to other modes, a target random access resource that is available or preferably used in the first random access procedure of accessing the parent IAB node.
Detailed description of the preferred embodiments
In the third embodiment, the manner of determining the target random access resource from the plurality of random access resources in step 101 is optionally:
Determining the target random access resource based on a first random access resource used by the IAB node to be accessed in a second random access process of accessing the father IAB node; wherein the second random access procedure is located before the first random access procedure in time domain sequence, and the first random access resource is a universal random access resource.
It will be appreciated that in this particular embodiment, the random access resources available or preferentially used when re-accessing the random access are determined based on a back-off or statistical approach.
Further optionally, the step of determining the target random access resource based on the first random access resource used by the to-be-accessed IAB node in the second random access process of accessing the parent IAB node may specifically refer to fig. 4, and includes the following steps:
step 401, determining whether the to-be-accessed IAB node uses the first random access resource to access the parent IAB node in the second random access process successfully, if yes, executing step 403, otherwise, executing step 405.
Step 403, determining the first random access resource as the target random access resource.
Further optionally, in case the first random access resource is determined as the target random access resource, a physical random access channel PRACH preamble (preamble) length of the target random access resource is greater than or equal to a PRACH preamble length of the first random access resource.
It may be understood that, when the currently selected parent IAB node is successfully accessed through the universal random access resource before the IAB node is to be accessed, the IAB node to be accessed may initiate a random access procedure to the parent IAB node using or preferentially using the universal random access resource. Further optionally, in the random access procedure of the node to be accessed with the IAB currently accessing the parent IAB, the length PRACHpreamble of the available universal random access resource is not shorter than the PRACHpreamble length of the universal random access resource used when the node to be accessed is successfully accessed before.
Step 405, determining a seventh random access resource in the plurality of random access resources as the target random access resource; wherein, the seventh random access resource is a random access resource special for the IAB node MT function module.
It can be understood that when the node-b to be accessed attempts to access its selected parent node-b through the universal random access resource before, but does not succeed in accessing, the node-b to be accessed can initiate a random access procedure to the parent node-b using or preferentially using the random access resource dedicated to the node-b MT function module.
Further alternatively, when the configuration of the universal random access resource is changed, for example, the length of PRACHpreamble of the universal random access resource is changed, the node to be IAB may redetermine the available or preferentially used random access resource according to the method shown in the third embodiment.
Detailed description of the preferred embodiments
In the fourth embodiment, the manner of determining the target random access resource from the plurality of random access resources in the step 101 is optionally:
And determining the target random access resource based on the target configuration of the plurality of random access resources.
Further optionally, the step of determining the target random access resource based on the target configuration of the plurality of random access resources may specifically refer to fig. 5, and includes the following steps:
step 501, determining whether the PRACH preamble length of the eighth random access resource of the plurality of random access resources is greater than the PRACH preamble length of the ninth random access resource of the plurality of random access resources, if not, executing step 503, otherwise executing step 505.
Step 503, determining the ninth random access resource as the target random access resource; the eighth random access resource is a random access resource special for the IAB node MT functional module, and the ninth random access resource is a universal random access resource.
Step 505, determining the eighth random access resource as the target random access resource.
It can be understood that if the length of the PRACH preamble of the random access resource dedicated for the rab node MT function module configured by the parent rab node selected by the rab node to be accessed is not longer than the length of PRACHpreamble of the universal random access resource, the rab node to be accessed selects the universal random access resource as the target random access resource available or preferentially used in the current first random access process of accessing the parent rab node; otherwise, the IAB node to be accessed selects the random access resource special for the MT function module of the IAB node as the target random access resource available or preferentially used in the current first random access process of the access father IAB node.
Detailed description of the preferred embodiments
In the fifth embodiment, the manner of determining the target random access resource from the plurality of random access resources in the step 101 may be:
And determining the earliest available resource in the plurality of random access resources as the target random access resource.
It can be understood that, when the IAB node to be accessed determines that the common random access resource can be used, or the random access resource dedicated to the IAB node MT function module can be used, the IAB node to be accessed can select the earliest available (or incoming) random access resource as the target random access resource available or preferentially used in the current first random access procedure of accessing the parent IAB node, so as to realize the minimum random access delay.
Referring to fig. 6, an embodiment of the present application provides a self-backhauled IAB node 600, the IAB node 600 comprising:
A determining module 601, configured to determine a target random access resource from a plurality of random access resources when a parent IAB node of an IAB node to be accessed is simultaneously configured with the plurality of random access resources; the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node to be accessed currently.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to determine the target random access resource from the multiple random access resources by one of the following manners:
Determining the target random access resource based on the distance between the IAB node to be accessed and the father IAB node; determining the target random access resource based on the type of the MT function module of the IAB node to be accessed; determining the target random access resource based on a first random access resource used by the IAB node to be accessed in a second random access process of accessing the father IAB node; wherein the second random access procedure is located before the first random access procedure in time domain sequence, and the first random access resource is a universal random access resource; determining the target random access resource based on target configuration of the plurality of random access resources; and determining the earliest available resource in the plurality of random access resources as the target random access resource.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to:
If the distance between the IAB node to be accessed and the father IAB node is smaller than a preset distance threshold, determining a second random access resource in the plurality of random access resources as the target random access resource; if the distance between the IAB node to be accessed and the father IAB node is larger than or equal to the preset distance threshold, determining a third random access resource in the plurality of random access resources as the target random access resource; the second random access resource is a universal random access resource, and the third random access resource is a random access resource special for an IAB node mobile terminal MT functional module.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to determine that a distance between the IAB node to be accessed and the parent IAB node is smaller than the preset distance threshold when at least one of the following conditions is satisfied:
the IAB node to be accessed measures that the path loss of the father IAB node is smaller than a preset path loss threshold; and the quality of the wireless signal from the father IAB node measured by the IAB node to be accessed is higher than a preset signal quality threshold.
Optionally, in the IAB node 600 of the embodiment of the present application, at least one of the preset distance threshold and the preset signal quality threshold is configured by the centralized unit CU.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to:
And determining the distance between the IAB node to be accessed and the father IAB node based on the position information of the IAB node to be accessed and the position information of the father IAB node.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to:
If the type of the MT functional module of the IAB node to be accessed is a local MT, determining a fourth random access resource in the plurality of random access resources as the target random access resource; if the type of the MT functional module of the IAB node to be accessed is wide area MT, determining a fifth random access resource in the plurality of random access resources as the target random access resource; if the type of the MT functional module of the IAB node to be accessed is a medium domain MT, determining a sixth random access resource from the plurality of random access resources as the target random access resource; the fourth random access resource is a universal random access resource, the fifth random access resource is a random access resource special for the IAB node MT functional module, and the sixth random access resource is a universal random access resource or a random access resource special for the IAB node MT functional module.
Optionally, in the IAB node 600 of the embodiment of the present application, the sixth random access resource includes one of the following: a random access resource determined based on the judgment of the node to be accessed; the earliest available random access resource.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to:
If the IAB node to be accessed successfully accesses the father IAB node by using the first random access resource in the second random access process, determining the first random access resource as the target random access resource; if the IAB node to be accessed fails to access the father IAB node by using the first random access resource in the second random access process, determining a seventh random access resource in the plurality of random access resources as the target random access resource; wherein, the seventh random access resource is a random access resource special for the IAB node MT function module.
Optionally, in the IAB node 600 of the embodiment of the present application, in a case where the first random access resource is determined as the target random access resource, a physical random access channel PRACH preamble length of the target random access resource is greater than or equal to a PRACH preamble length of the first random access resource.
Optionally, in the IAB node 600 of the embodiment of the present application, the determining module 601 may be specifically configured to:
If the PRACH preamble length of an eighth random access resource of the plurality of random access resources is less than or equal to the PRACH preamble length of a ninth random access resource of the plurality of random access resources, determining the ninth random access resource as the target random access resource; if the PRACH preamble length of the eighth random access resource is greater than the PRACH preamble length of the ninth random access resource, determining the eighth random access resource as the target random access resource; the eighth random access resource is a random access resource special for the IAB node MT functional module, and the ninth random access resource is a universal random access resource.
It can be understood that, in the IAB node 600 provided in the embodiment of the present application, the foregoing method for determining a random access resource performed by the IAB node 600 can be implemented, and the relevant descriptions about the method for determining a random access resource are applicable to the IAB node 600 and are not repeated herein.
In the embodiment of the application, when the father IAB node selected by the IAB node to be accessed is simultaneously configured with a plurality of random access resources, the IAB node to be accessed can firstly select from the plurality of random access resources before accessing the father IAB node so as to determine the target random access resources available or preferentially used in the first random access process of the father IAB node to be accessed currently. In this way, through the target random access resource which is explicitly available in advance or can be used preferentially and is used for accessing the father IAB node, the probability of success of random access of the IAB node to be accessed, the use efficiency of the random access resource can be improved, and the time delay of the random access process can be reduced.
Referring to fig. 7, fig. 7 is a block diagram of a self-backhaul IAB node applied in the embodiment of the present invention, which can implement details of the method for determining a random access resource in the foregoing embodiment and achieve the same effects. As shown in fig. 7, the self-backhauling IAB node 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704 and a bus interface 705, wherein:
In an embodiment of the present invention, the self-backhauled IAB node 700 further includes: a computer program stored on the memory 703 and executable on the processor 701, which when executed by the processor 701 performs the steps of:
Under the condition that a father IAB node of the IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining target random access resources from the plurality of random access resources; the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node to be accessed currently.
In the embodiment of the application, when the father IAB node selected by the IAB node to be accessed is simultaneously configured with a plurality of random access resources, the IAB node to be accessed can firstly select from the plurality of random access resources before accessing the father IAB node so as to determine the target random access resources available or preferentially used in the first random access process of the father IAB node to be accessed currently. In this way, through the target random access resource which is explicitly available in advance or can be used preferentially and is used for accessing the father IAB node, the probability of success of random access of the IAB node to be accessed, the use efficiency of the random access resource can be improved, and the time delay of the random access process can be reduced.
In fig. 7, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular, one or more processors represented by the processor 701 and various circuits of memory represented by the memory 703. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. Bus interface 705 provides an interface. The transceiver 702 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.
Preferably, the embodiment of the present application further provides a self-backhaul IAB node, which includes a processor, a memory, and a program or an instruction stored in the memory and capable of running on the processor, where the program or the instruction when executed by the processor implements each process of the foregoing embodiment of the method for determining a random access resource, and the same technical effects can be achieved, and for avoiding repetition, a description is omitted herein.
The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above embodiment of the method for determining a random access resource, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here.
Wherein, the processor is the processor in the self-backhaul IAB node described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims (24)

1. A method for determining random access resources, applied to a self-backhauled IAB node, the method comprising:
Under the condition that a father IAB node of the IAB node to be accessed is simultaneously provided with a plurality of random access resources for the IAB node to be accessed, determining target random access resources from the plurality of random access resources, wherein the plurality of random access resources comprise universal random access resources and random access resources special for an IAB node MT functional module;
the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node currently accessed;
The means for determining a target random access resource from the plurality of random access resources comprises at least one of:
Determining the target random access resource based on the type of the MT function module of the IAB node to be accessed;
Determining the target random access resource based on a first random access resource used by the IAB node to be accessed in a second random access process of accessing the father IAB node; wherein the second random access procedure is located before the first random access procedure in time domain sequence, and the first random access resource is a universal random access resource;
And determining the earliest available resource in the plurality of random access resources as the target random access resource.
2. The method of claim 1, wherein the means for determining a target random access resource from the plurality of random access resources further comprises at least one of:
determining the target random access resource based on the distance between the IAB node to be accessed and the father IAB node;
And determining the target random access resource based on the target configuration of the plurality of random access resources.
3. The method of claim 2, wherein the determining the target random access resource based on the distance between the to-be-accessed IAB node and the parent IAB node comprises:
If the distance between the IAB node to be accessed and the father IAB node is smaller than a preset distance threshold, determining a second random access resource in the plurality of random access resources as the target random access resource;
if the distance between the IAB node to be accessed and the father IAB node is larger than or equal to the preset distance threshold, determining a third random access resource in the plurality of random access resources as the target random access resource;
the second random access resource is a universal random access resource, and the third random access resource is a random access resource special for an IAB node mobile terminal MT functional module.
4. A method according to claim 3, characterized by determining that the distance between the node of the IAB to be accessed and the parent IAB node is smaller than the preset distance threshold if at least one of the following conditions is fulfilled:
The IAB node to be accessed measures that the path loss of the father IAB node is smaller than a preset path loss threshold;
And the quality of the wireless signal from the father IAB node measured by the IAB node to be accessed is higher than a preset signal quality threshold.
5. The method according to claim 4, wherein at least one of the preset distance threshold and the preset signal quality threshold is configured by a centralized unit CU.
6. A method according to claim 3, characterized in that the method further comprises:
And determining the distance between the IAB node to be accessed and the father IAB node based on the position information of the IAB node to be accessed and the position information of the father IAB node.
7. The method according to claim 2, wherein said determining the target random access resource based on the type of MT function module of the IAB node to be accessed comprises:
if the type of the MT functional module of the IAB node to be accessed is a local MT, determining a fourth random access resource in the plurality of random access resources as the target random access resource;
If the type of the MT functional module of the IAB node to be accessed is wide area MT, determining a fifth random access resource in the plurality of random access resources as the target random access resource;
if the type of the MT functional module of the IAB node to be accessed is a medium domain MT, determining a sixth random access resource from the plurality of random access resources as the target random access resource;
The fourth random access resource is a universal random access resource, the fifth random access resource is a random access resource special for the IAB node MT functional module, and the sixth random access resource is a universal random access resource or a random access resource special for the IAB node MT functional module.
8. The method of claim 7, wherein the sixth random access resource comprises one of:
A random access resource determined based on the judgment of the node to be accessed;
The earliest available random access resource.
9. The method of claim 2, wherein the determining the target random access resource based on the first random access resource used by the IAB node to be accessed in the second random access procedure accessing the parent IAB node comprises:
If the IAB node to be accessed successfully accesses the father IAB node by using the first random access resource in the second random access process, determining the first random access resource as the target random access resource;
If the IAB node to be accessed fails to access the father IAB node by using the first random access resource in the second random access process, determining a seventh random access resource in the plurality of random access resources as the target random access resource;
wherein, the seventh random access resource is a random access resource special for the IAB node MT function module.
10. The method of claim 9, wherein a physical random access channel, PRACH, preamble length of the target random access resource is greater than or equal to a PRACH preamble length of the first random access resource if the first random access resource is determined to be the target random access resource.
11. The method of claim 2, wherein the determining the target random access resource based on the target configuration of the plurality of random access resources comprises:
If the PRACH preamble length of an eighth random access resource of the plurality of random access resources is less than or equal to the PRACH preamble length of a ninth random access resource of the plurality of random access resources, determining the ninth random access resource as the target random access resource;
If the PRACH preamble length of the eighth random access resource is greater than the PRACH preamble length of the ninth random access resource, determining the eighth random access resource as the target random access resource;
the eighth random access resource is a random access resource special for the IAB node MT functional module, and the ninth random access resource is a universal random access resource.
12. A self-backhauling IAB node, comprising:
A determining module, configured to determine a target random access resource from a plurality of random access resources when a parent IAB node of an IAB node to be accessed is simultaneously configured with the plurality of random access resources for the IAB node to be accessed, where the plurality of random access resources include a universal random access resource and a random access resource dedicated by an IAB node MT function module;
the target random access resource is a random access resource which is available or used preferentially by the IAB node to be accessed in a first random access process of the parent IAB node currently accessed;
the determining module is specifically configured to determine the target random access resource from the plurality of random access resources by one of the following manners:
Determining the target random access resource based on the type of the MT function module of the IAB node to be accessed;
Determining the target random access resource based on a first random access resource used by the IAB node to be accessed in a second random access process of accessing the father IAB node; wherein the second random access procedure is located before the first random access procedure in time domain sequence, and the first random access resource is a universal random access resource;
And determining the earliest available resource in the plurality of random access resources as the target random access resource.
13. The IAB node according to claim 12, wherein the determining means is further configured to determine the target random access resource from the plurality of random access resources by one of:
determining the target random access resource based on the distance between the IAB node to be accessed and the father IAB node;
And determining the target random access resource based on the target configuration of the plurality of random access resources.
14. The IAB node of claim 13, wherein the determining module is specifically configured to:
If the distance between the IAB node to be accessed and the father IAB node is smaller than a preset distance threshold, determining a second random access resource in the plurality of random access resources as the target random access resource;
if the distance between the IAB node to be accessed and the father IAB node is larger than or equal to the preset distance threshold, determining a third random access resource in the plurality of random access resources as the target random access resource;
the second random access resource is a universal random access resource, and the third random access resource is a random access resource special for an IAB node mobile terminal MT functional module.
15. The IAB node of claim 14, wherein the determining module is configured to determine that a distance between the IAB node to be accessed and the parent IAB node is less than the preset distance threshold if at least one of the following conditions is satisfied:
The IAB node to be accessed measures that the path loss of the father IAB node is smaller than a preset path loss threshold;
And the quality of the wireless signal from the father IAB node measured by the IAB node to be accessed is higher than a preset signal quality threshold.
16. The IAB node of claim 15, wherein at least one of the preset distance threshold and the preset signal quality threshold is configured by a centralized unit CU.
17. The IAB node of claim 13, wherein the determining module is specifically configured to:
And determining the distance between the IAB node to be accessed and the father IAB node based on the position information of the IAB node to be accessed and the position information of the father IAB node.
18. The IAB node of claim 13, wherein the determining module is specifically configured to:
if the type of the MT functional module of the IAB node to be accessed is a local MT, determining a fourth random access resource in the plurality of random access resources as the target random access resource;
If the type of the MT functional module of the IAB node to be accessed is wide area MT, determining a fifth random access resource in the plurality of random access resources as the target random access resource;
if the type of the MT functional module of the IAB node to be accessed is a medium domain MT, determining a sixth random access resource from the plurality of random access resources as the target random access resource;
The fourth random access resource is a universal random access resource, the fifth random access resource is a random access resource special for the IAB node MT functional module, and the sixth random access resource is a universal random access resource or a random access resource special for the IAB node MT functional module.
19. The IAB node of claim 18, wherein the sixth random access resource comprises one of:
A random access resource determined based on the judgment of the node to be accessed;
The earliest available random access resource.
20. The IAB node of claim 13, wherein the determining module is specifically configured to:
If the IAB node to be accessed successfully accesses the father IAB node by using the first random access resource in the second random access process, determining the first random access resource as the target random access resource;
If the IAB node to be accessed fails to access the father IAB node by using the first random access resource in the second random access process, determining a seventh random access resource in the plurality of random access resources as the target random access resource;
wherein, the seventh random access resource is a random access resource special for the IAB node MT function module.
21. The IAB node of claim 20, wherein a physical random access channel, PRACH, preamble length of the target random access resource is greater than or equal to a PRACH preamble length of the first random access resource if the first random access resource is determined to be the target random access resource.
22. The IAB node of claim 13, wherein the determining module is specifically configured to:
If the PRACH preamble length of an eighth random access resource of the plurality of random access resources is less than or equal to the PRACH preamble length of a ninth random access resource of the plurality of random access resources, determining the ninth random access resource as the target random access resource;
If the PRACH preamble length of the eighth random access resource is greater than the PRACH preamble length of the ninth random access resource, determining the eighth random access resource as the target random access resource;
the eighth random access resource is a random access resource special for the IAB node MT functional module, and the ninth random access resource is a universal random access resource.
23. A self-backhauling IAB node, comprising: memory, a processor and a program or instruction stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method according to any one of claims 1 to 11.
24. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the method according to any of claims 1 to 11.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108882259A (en) * 2017-05-16 2018-11-23 维沃移动通信有限公司 A kind of method of random access, terminal, source base station and target BS
WO2019212297A1 (en) * 2018-05-04 2019-11-07 엘지전자 주식회사 Initial access method of iab node in wireless communication system and apparatus using same method
WO2020010498A1 (en) * 2018-07-10 2020-01-16 Zte Corporation Random access resource allocation for integrated access and backhaul nodes
WO2020027626A1 (en) * 2018-08-03 2020-02-06 Samsung Electronics Co., Ltd. Method and apparatus for random access in an integrated access and backhaul communication system
CN110831066A (en) * 2018-08-10 2020-02-21 中国移动通信有限公司研究院 Resource processing method and equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11076432B2 (en) * 2018-06-26 2021-07-27 Qualcomm Incorporated Conflict avoidance in Random Access Channel (RACH) resources in Integrated Access and Backhaul (IAB) networks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108882259A (en) * 2017-05-16 2018-11-23 维沃移动通信有限公司 A kind of method of random access, terminal, source base station and target BS
WO2019212297A1 (en) * 2018-05-04 2019-11-07 엘지전자 주식회사 Initial access method of iab node in wireless communication system and apparatus using same method
WO2020010498A1 (en) * 2018-07-10 2020-01-16 Zte Corporation Random access resource allocation for integrated access and backhaul nodes
WO2020027626A1 (en) * 2018-08-03 2020-02-06 Samsung Electronics Co., Ltd. Method and apparatus for random access in an integrated access and backhaul communication system
CN110831066A (en) * 2018-08-10 2020-02-21 中国移动通信有限公司研究院 Resource processing method and equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Huawei, HiSilicon.R2-2003017 "Clarification on the RACH configuration used in MAC procedure for IAB".3GPP tsg_ran\wg2_rl2.2020,(第tsgr2_109bis-e期),第1-2节. *

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