CN113840389A - Method for determining random access resource and self-feedback IAB (inter-integrated access node) - Google Patents

Method for determining random access resource and self-feedback IAB (inter-integrated access node) Download PDF

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Publication number
CN113840389A
CN113840389A CN202010581098.XA CN202010581098A CN113840389A CN 113840389 A CN113840389 A CN 113840389A CN 202010581098 A CN202010581098 A CN 202010581098A CN 113840389 A CN113840389 A CN 113840389A
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China
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random access
access resource
iab node
accessed
determining
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CN202010581098.XA
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Chinese (zh)
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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 CN202010581098.XA priority Critical patent/CN113840389A/en
Priority to PCT/CN2021/101059 priority patent/WO2021259174A1/en
Publication of CN113840389A publication Critical patent/CN113840389A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • 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, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Abstract

The application discloses a method for determining random access resources and a self-feedback 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 an IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining a target random access resource from the plurality of random access resources; the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently. According to the embodiment of the application, the target random access resource which is available in advance or can be preferentially used for accessing the parent IAB node can be used, 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-feedback IAB (inter-integrated access node)
Technical Field
The present application relates to the field of communications, and in particular, to a method for determining random access resources and a self-backhauled IAB node.
Background
Currently, in a New Radio (NR) system, an Integrated Access Backhaul (IAB) may provide extended coverage for an NR cell and may also provide capacity enhancement for the NR cell, where an access node that supports wireless access of a User Equipment (UE) and wirelessly transmits data back is referred to as an IAB node (IABN). And an access node providing a wireless backhaul function for the IAB node to enable the UE to connect with a Core network (Core Net, CN) is called a home IAB node (IAB-donoranode), and wired transmission is performed between the home IAB and the Core network. 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 is transmitted between the access nodes through a wireless backhaul link (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 (MT) function module. By means of the MT function, an upstream access node (i.e., Parent IAB node Parent IABN, P-IABN) can be found by an access node to be accessed (i.e., IABN), and a wireless backhaul link is established with the DU of the upstream access node. After an IAB node establishes a complete backhaul link, the IAB node opens its DU function, and the DU provides cell service, that is, the DU can provide access service for the UE. Wherein a self-feedback loop contains one home IAB node, all the DUs of the IAB nodes in the self-feedback loop can be connected to one CU node, i.e. the CU function module of the home IAB node.
Therefore, in the process of implementing the present application, the inventors found that at least the following problems exist in the prior art: at present, for an IAB node to be accessed, there is no selection mechanism for accessing a random access resource of a parent IAB node selected by the IAB node, which results in influencing the probability of successful random access of the IAB node, the amount of the IAB random access resource to be configured, the time delay of a random access process, and the like.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method for determining a random access resource and a self-backhauled IAB node, so as to solve a problem in the prior art that an IAB node to be accessed does not have a mechanism for selecting a random access resource of a parent IAB node selected for accessing the IAB node.
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, and the method includes:
under the condition that a father IAB node of an IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining a target random access resource from the plurality of random access resources; the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently.
In a second aspect, an embodiment of the present application provides a self-backhauled IAB node, including:
a determining module, configured to determine a target random access resource from multiple random access resources when a parent IAB node to be accessed to an IAB node is configured with multiple random access resources at the same time; the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently.
In a third aspect, an embodiment of the present application provides a self-backhauled IAB node, including: a memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implement the steps of the method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the first aspect.
In the embodiment of the present application, when a parent IAB node selected by an IAB node to be accessed is configured with multiple random access resources at the same time, the IAB node to be accessed may first select from the multiple random access resources before accessing its parent IAB node, so as to determine a target random access resource that is available or can be preferentially used in a first random access process currently accessing its parent IAB node. In this way, by explicitly using the target random access resource for accessing the parent IAB node in advance or being preferentially used, the probability of successful random access of the to-be-accessed IAB node and 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 application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart illustrating a method for determining a random access resource according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a distance-based method for determining random access resources in an embodiment of the present application;
fig. 3 is a flowchart illustrating a manner of determining a random access resource based on a type of an MT function module of an IAB node to be accessed in an embodiment of the present application;
fig. 4 is a flowchart illustrating a manner of determining a random access resource based on a historical access result of an to-be-accessed IAB node accessing a parent IAB node in an embodiment of the present application;
fig. 5 is a schematic flow chart illustrating a method for determining a random access resource based on a PRACH preamble length according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a self-backhauled IAB node in an embodiment of the present application;
fig. 7 is a schematic structural diagram of another self-backhauled IAB node in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application 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 is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The technical scheme of the application can be applied to various communication systems, such as: global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) System, Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term evolution/enhanced Long Term evolution (LTE-a), NR, and the like.
User Equipments (UEs), which may be Terminal equipments such as Mobile phones (or "cellular" phones) and computers with Terminal equipments such as portable, pocket, hand-held, computer-included or vehicle-mounted Mobile devices, exchange languages and/or data with a Radio Access Network (RAN), may also be referred to as Terminal equipments (Mobile terminals), Mobile user equipments, etc., and may communicate with one or more core networks via the RAN.
The network device, which may also be referred to as a Base Station, may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) in LTE, and a 5G Base Station (gNB).
The technical solutions provided by the embodiments of the present application are described in detail below 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 executed by a self-backhauled IAB node, and the method includes the following steps:
step 101: under the condition that a father IAB node of an IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining a target random access resource from the plurality of random access resources; the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently.
In the embodiment of the present application, when a parent IAB node selected by an IAB node to be accessed is configured with multiple random access resources at the same time, the IAB node to be accessed may first select from the multiple random access resources before accessing its parent IAB node, so as to determine a target random access resource that is available or can be preferentially used in a first random access process currently accessing its parent IAB node. In this way, by explicitly using the target random access resource for accessing the parent IAB node in advance or being preferentially used, the probability of successful random access of the to-be-accessed IAB node and 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 including, but not limited to, a general random access resource (e.g., a random access resource configured by a rach-ConfigCommon parameter in 3GPP TS 38.331 v16.0.0) and a random access resource dedicated to an MT function module of the IAB node (e.g., a random access resource configured by a rach-ConfigCommon parameter in 3GPP TS 38.331 v16.0.0); generally, the Physical Random Access Channel (PRACH) transmission window of the generic Random Access resource is dense, and can provide Access service for a large number of UEs, while the PRACH transmission window of the Random Access resource dedicated to the IAB node MT function module is sparse because the number of other IAB nodes served by one IAB node is much smaller than the number of UEs served by the IAB node.
Optionally, the parent IAB node selected by the IAB node to be accessed may include an IAB-donor node.
Optionally, in the method for determining random access resources of the embodiment of the present application, in step 101, the target random access resource may be determined from the multiple types of random access resources in different manners, so as to ensure that the target random access resource required accurately and smoothly is ensured. The manner of determining the target random access resource from the multiple random access resources includes, but is not limited to, the contents described in the following specific embodiments.
Detailed description of the preferred embodiment
In this embodiment one, in the step 101, a manner of determining the target random access resource from the multiple random access resources may be as follows:
and determining the target random access resource based on the distance between the IAB node to be accessed and the father IAB node.
It can be understood that, in order to improve the probability that the to-be-accessed IAB node accesses the parent IAB node in consideration of different requirements of the self-backhaul channel for wireless transmission in different transmission distances, a 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 can be understood that, when the distance between the to-be-accessed IAB node and the parent IAB node is short, the generic random access resource may be used as a random access resource available or preferentially used in the first random access procedure for accessing the parent IAB node.
Step 205, determining a third random access resource in the multiple random access resources as the target random access resource; wherein, the third random access resource is a random access resource dedicated for an IAB node MT function module.
It can be understood that, when the distance between the IAB node to be accessed and the parent IAB node is relatively long, the random access resource dedicated to the IAB node MT function module may be used as the random access resource available or preferentially used in the first random access procedure for accessing the parent IAB node.
Further optionally, in the first embodiment, 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 the corresponding preset distance threshold, including but not limited to at least one of the following specific manners:
the first method is as follows: determining that the distance between the IAB node to be accessed and the parent IAB node is smaller than the preset distance threshold under the condition that at least one of the following conditions is met:
the IAB 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 to-be-accessed IAB node is higher than a preset signal quality threshold.
It can be understood that, specifically, the distance between the to-be-accessed IAB node and the parent IAB node may be measured according to at least one of the path loss measured by the to-be-accessed IAB node to the parent IAB node and the quality of the wireless signal from the parent IAB node measured by the to-be-accessed IAB node, and whether a condition of selecting the general random access resource as the random access resource available or preferentially used in the current first random access process in which the to-be-accessed IAB node accesses the parent IAB node is satisfied. The smaller the path loss measured by the to-be-accessed IAB node to the parent IAB node is and/or the higher the quality of the wireless signal from the parent IAB node measured by the to-be-accessed IAB node is, the more suitable the distance between the to-be-accessed IAB node and the parent IAB node is for using the general random access resource as the condition of 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.
Further alternatively, the Quality of the wireless Signal from the parent IAB node measured by the IAB node may be measured by Reference Signal Received Power (RSRP), Received Signal Strength Indication (RSSI), Reference Signal Received Quality (RSRQ), Signal Noise Ratio (SNR), Signal to Interference plus Noise Ratio (SINR), Signal-to-Interference Ratio (SIR), etc. Optionally, the IAB node to be accessed may obtain the radio quality parameter through measurement of 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 (PDSCH), and a Channel State Information (CSI) Reference Signal (CSI-RS).
The second method comprises the following steps: firstly, the distance between the IAB node to be accessed and the father IAB node is determined, and the determined distance is further compared 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 executed 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.
Specifically, the distance between the position information of the IAB node to be accessed and the position information of the parent IAB node may be accurately determined first, and then whether the condition that the common random access resource is used as a random access resource available or preferentially used in the current first random access process of the IAB node to be accessed into the parent IAB node is satisfied is intuitively measured based on the determined distance.
The location information of the IAB node to be accessed and the location information of the parent IAB node may include, but are not limited to, location information of a macro base station pre-stored in the corresponding IAB node.
Optionally, in a first embodiment of the present invention, at least one of the preset distance threshold and the preset signal quality threshold is configured by a centralized unit CU. Further optionally, the configuration may be performed through a system message configuration or through an Operation and Maintenance Administration (OAM) message configuration.
Detailed description of the invention
In this embodiment two, in the step 101, a manner of determining the target random access resource from the multiple random access resources may be as follows:
and determining the target random access resource based on the type of the mobile terminal MT function module of the IAB node to be accessed.
It can be understood that, considering that the type of the MT function module 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 to access the parent IAB node can be selected based on the type of the MT function module of the IAB node to be accessed.
The MT function module is characterized in that the distance between an IAB node of a wide-area MT (wide-area MT) and a parent IAB node of the wide-area MT is the farthest distance, the distance between the IAB node of a local-area MT (local-area MT) and the parent IAB node of the local-area MT is the closest distance, and the distance between the IAB node of a medium-area MT (medium-range MT) and the parent IAB node of the medium-area MT is the middle distance.
Further optionally, the step of determining the target random access resource based on the type of the MT function module of the mobile terminal to be accessed to the IAB node 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 function module of the to-be-accessed IAB node is local MT, determining a fourth random access resource of 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 to-be-accessed IAB node is a wide area MT, determining a fifth random access resource of the multiple random access resources as the target random access resource; wherein, the fifth random access resource is a random access resource dedicated for an IAB node MT function module.
Step 307, if the type of the MT function module of the to-be-accessed IAB node is a medium-range MT, determining a sixth random access resource from the multiple random access resources as the target random access resource; wherein, the sixth random access resource is a general random access resource or a random access resource dedicated to the IAB node MT function module.
Further optionally, the sixth random access resource includes one of:
(a) and the random access resource is determined based on the judgment of the node to be accessed. That is, when the type of the MT function module of the to-be-accessed IAB node is the medium-scope MT, the to-be-accessed IAB node can automatically determine to select the target random access resource available or preferentially used in the first random access process of accessing the parent IAB node.
(b) The earliest available random access resource. That is, when the type of the MT function module to be accessed to the IAB node is the mid-range MT, the earliest available random access resource may be selected as the target random access resource available or preferentially used in the first random access procedure for accessing the parent IAB node.
It should be noted that, when the type of the MT function module of the to-be-accessed IAB node is the middle-range MT, in addition to the above two manners (a) and (b), the to-be-accessed IAB node may select the target random access resource that is available or preferentially used in the first random access procedure of accessing the parent IAB node according to other manners.
Detailed description of the preferred embodiment
In a third embodiment, in the step 101, a manner of determining the target random access resource from the multiple random access resources may be as follows:
determining the target random access resource based on a first random access resource used by the IAB to be accessed in a second random access process of accessing the parent IAB; wherein the second random access procedure is located before the first random access procedure in time domain order, and the first random access resource is a general random access resource.
It will be appreciated that in this particular embodiment, a back-off or statistical based approach determines the random access resources available or preferred for use in re-random access.
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 successfully accesses the parent IAB node by using the first random access resource in the second random access process, if so, executing step 403, otherwise, executing step 405.
Step 403, determining the first random access resource as the target random access resource.
Further optionally, when the first random access resource is determined as the target random access resource, a length of a physical random access channel PRACH preamble (preamble) of the target random access resource is greater than or equal to a length of the PRACH preamble of the first random access resource.
It can be understood that, when the IAB node to be accessed successfully accesses the currently selected parent IAB node through the universal random access resource before, 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 a random access process in which the to-be-accessed IAB node is currently accessed to the parent IAB node, the PRACHpreamble length of the available generic random access resource is not shorter than the PRACHpreamble length of the generic random access resource used in the previous successful access.
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 dedicated to the IAB node MT function module.
It can be understood that, when the to-be-accessed IAB node attempts to access its selected parent IAB node through the general random access resource before but does not access successfully, the to-be-accessed IAB node may initiate a random access procedure to the parent IAB node using or preferentially using the random access resource dedicated to the IAB node MT function module.
Further optionally, when the configuration of the generic random access resource changes, for example, when the length of the PRACHpreamble of the generic random access resource changes, the to-be-IAB node may re-determine the available or preferentially used random access resource according to the method shown in the third embodiment.
Detailed description of the invention
In a fourth embodiment of the present invention, in the step 101, a manner of determining the target random access resource from the multiple random access resources is optionally:
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 configurations of the multiple random access resources may specifically refer to fig. 5, and includes the following steps:
step 501, determining whether the length of the PRACH preamble of the eighth random access resource of the multiple random access resources is greater than the length of the PRACH preamble of the ninth random access resource of the multiple 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 dedicated to an IAB node MT function module, and the ninth random access resource is a general 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 to the IAB node MT function module configured in the parent IAB node selected by the to-be-accessed IAB node is not longer than the length of the PRACHpreamble of the generic random access resource, the to-be-accessed IAB node selects the generic random access resource as a target random access resource available or preferentially used in the current first random access process of accessing the parent IAB 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 embodiment
In this specific embodiment five, in the step 101, a manner of determining the target random access resource from the multiple random access resources may be as follows:
determining an earliest available resource among the plurality of random access resources as the target random access resource.
It can be understood that, when the to-be-accessed IAB node determines that both the general random access resource and the random access resource dedicated to the MT function module of the IAB node can be used, the to-be-accessed IAB node can select the earliest available (or coming) random access resource as the target random access resource available or preferentially used in the current first random access procedure of the access parent IAB node, so as to achieve the minimum random access delay.
Referring to fig. 6, an embodiment of the present application provides a self-backhauled IAB node 600, where the IAB node 600 includes:
a determining module 601, configured to determine a target random access resource from multiple random access resources when a parent IAB node to be accessed to an IAB node is configured with multiple random access resources at the same time; the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node 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 mobile terminal 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 to be accessed in a second random access process of accessing the parent IAB; wherein the second random access procedure is located before the first random access procedure in time domain order, and the first random access resource is a general random access resource; determining the target random access resource based on the target configuration of the plurality of random access resources; determining an earliest available resource among the plurality of random access resources as the target random access resource.
Optionally, in the IAB node 600 in 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 multiple random access resources as the target random access resource; the second random access resource is a general random access resource, and the third random access resource is a random access resource dedicated to an MT function module of the IAB node.
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 to-be-accessed IAB node and the parent IAB node is smaller than the preset distance threshold when at least one of the following conditions is met:
the IAB 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 to-be-accessed IAB node is higher than a preset signal quality threshold.
Optionally, in the IAB node 600 according to this 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 in 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 in 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 local area MT, determining a fourth random access resource in the multiple random access resources as the target random access resource; 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 in the multiple random access resources as the target random access resource; if the type of the MT function module of the IAB node to be accessed is a medium-domain MT, determining a sixth random access resource in the multiple random access resources as the target random access resource; the fourth random access resource is a general random access resource, the fifth random access resource is a random access resource dedicated to the IAB node MT function module, and the sixth random access resource is a general random access resource or a random access resource dedicated to the IAB node MT function module.
Optionally, in the IAB node 600 in this embodiment of the present application, the sixth random access resource includes one of: random access resources determined based on the judgment of the node to be accessed; the earliest available random access resource.
Optionally, in the IAB node 600 in the embodiment of the present application, the determining module 601 may be specifically configured to:
if the to-be-accessed IAB node successfully accesses the parent 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 to-be-accessed IAB node fails to access the parent IAB node by using the first random access resource in the second random access process, determining a seventh random access resource in the multiple random access resources as the target random access resource; wherein, the seventh random access resource is a random access resource dedicated to the IAB node MT function module.
Optionally, in the IAB node 600 of the embodiment of the present application, when the first random access resource is determined as the target random access resource, a length of a PRACH preamble of a physical random access channel of the target random access resource is greater than or equal to a length of the PRACH preamble of the first random access resource.
Optionally, in the IAB node 600 in the embodiment of the present application, the determining module 601 may be specifically configured to:
if the length of the PRACH preamble of the eighth random access resource in the plurality of random access resources is less than or equal to the length of the PRACH preamble of the ninth random access resource in the plurality of random access resources, determining the ninth random access resource as the target random access resource; if the length of the PRACH preamble of the eighth random access resource is greater than that 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 dedicated to an IAB node MT function module, and the ninth random access resource is a general random access resource.
It can be understood that, the IAB node 600 provided in the embodiment of the present application can implement the foregoing method for determining a random access resource performed by the IAB node 600, and the related descriptions about the method for determining a random access resource are all applicable to the IAB node 600, and are not described herein again.
In the embodiment of the present application, when a parent IAB node selected by an IAB node to be accessed is configured with multiple random access resources at the same time, the IAB node to be accessed may first select from the multiple random access resources before accessing its parent IAB node, so as to determine a target random access resource that is available or can be preferentially used in a first random access process currently accessing its parent IAB node. In this way, by explicitly using the target random access resource for accessing the parent IAB node in advance or being preferentially used, the probability of successful random access of the to-be-accessed IAB node and 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 structural diagram of a self-backhauled IAB node according to an embodiment of the present invention, which can achieve the details of the method for determining random access resources in the foregoing embodiment and achieve the same effect. As shown in fig. 7, self-backhauled IAB node 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704, and a bus interface 705, wherein:
in the 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, the computer program when executed by the processor 701 implementing the steps of:
under the condition that a father IAB node of an IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining a target random access resource from the plurality of random access resources; the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently.
In the embodiment of the present application, when a parent IAB node selected by an IAB node to be accessed is configured with multiple random access resources at the same time, the IAB node to be accessed may first select from the multiple random access resources before accessing its parent IAB node, so as to determine a target random access resource that is available or can be preferentially used in a first random access process currently accessing its parent IAB node. In this way, by explicitly using the target random access resource for accessing the parent IAB node in advance or being preferentially used, the probability of successful random access of the to-be-accessed IAB node and 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, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface 705 provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide 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 a desired device for different user devices, 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, an embodiment of the present application further provides a self-backhauled IAB node, which includes a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, where the program or the instruction, when executed by the processor, implements each process of the foregoing method for determining a random access resource, and can achieve the same technical effect, and details are not described here to avoid repetition.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing method for determining a random access resource, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Wherein the processor is the processor in the self-backhauled IAB node described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (24)

1. A method for determining random access resources, applied to a self-backhauled IAB node, is characterized in that the method comprises:
under the condition that a father IAB node of an IAB node to be accessed is simultaneously configured with a plurality of random access resources, determining a target random access resource from the plurality of random access resources;
the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently.
2. The method according to claim 1, wherein the determining the 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 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 mobile terminal 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 to be accessed in a second random access process of accessing the parent IAB; wherein the second random access procedure is located before the first random access procedure in time domain order, and the first random access resource is a general random access resource;
determining the target random access resource based on the target configuration of the plurality of random access resources;
determining an earliest available resource among the plurality of random access resources as the target random access resource.
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 multiple random access resources as the target random access resource;
the second random access resource is a general random access resource, and the third random access resource is a random access resource dedicated to an MT function module of the IAB node.
4. The method of claim 3, wherein the distance between the to-be-accessed IAB node and the parent IAB node is determined to be less than the preset distance threshold when at least one of the following conditions is met:
the IAB 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 to-be-accessed IAB node is higher than a preset signal quality threshold.
5. The method of 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. The method of claim 3, further comprising:
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 of claim 2, wherein the determining the target random access resource based on the type of the 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 local area MT, determining a fourth random access resource in the multiple random access resources as the target random access resource;
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 in the multiple random access resources as the target random access resource;
if the type of the MT function module of the IAB node to be accessed is a medium-domain MT, determining a sixth random access resource in the multiple random access resources as the target random access resource;
the fourth random access resource is a general random access resource, the fifth random access resource is a random access resource dedicated to the IAB node MT function module, and the sixth random access resource is a general random access resource or a random access resource dedicated to the IAB node MT function module.
8. The method of claim 7, wherein the sixth random access resource comprises one of:
random access resources 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 a first random access resource used by the to-be-accessed IAB node in a second random access procedure for accessing the parent IAB node comprises:
if the to-be-accessed IAB node successfully accesses the parent 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 to-be-accessed IAB node fails to access the parent IAB node by using the first random access resource in the second random access process, determining a seventh random access resource in the multiple random access resources as the target random access resource;
wherein, the seventh random access resource is a random access resource dedicated to the IAB node MT function module.
10. The method according to claim 9, wherein if the first random access resource is determined to be the target random access resource, the physical random access channel, PRACH, preamble length of the target random access resource is greater than or equal to the PRACH preamble length of the first 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 length of the PRACH preamble of the eighth random access resource in the plurality of random access resources is less than or equal to the length of the PRACH preamble of the ninth random access resource in the plurality of random access resources, determining the ninth random access resource as the target random access resource;
if the length of the PRACH preamble of the eighth random access resource is greater than that 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 dedicated to an IAB node MT function module, and the ninth random access resource is a general random access resource.
12. A self-backhauled IAB node, comprising:
a determining module, configured to determine a target random access resource from multiple random access resources when a parent IAB node to be accessed to an IAB node is configured with multiple random access resources at the same time;
the target random access resource is a random access resource which is available or preferentially used by the IAB node to be accessed in a first random access process of accessing the parent IAB node currently.
13. The IAB node of claim 12, wherein the determining module is specifically 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;
determining the target random access resource based on the type of the mobile terminal 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 to be accessed in a second random access process of accessing the parent IAB; wherein the second random access procedure is located before the first random access procedure in time domain order, and the first random access resource is a general random access resource;
determining the target random access resource based on the target configuration of the plurality of random access resources;
determining an earliest available resource among the plurality of random access resources as the target random access resource.
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 multiple random access resources as the target random access resource;
the second random access resource is a general random access resource, and the third random access resource is a random access resource dedicated to an MT function module of the IAB node.
15. The IAB node of claim 14, wherein the determining module is specifically configured to determine that the distance between the to-be-accessed IAB node and the parent IAB node is smaller than the preset distance threshold when at least one of the following conditions is met:
the IAB 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 to-be-accessed IAB node 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 local area MT, determining a fourth random access resource in the multiple random access resources as the target random access resource;
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 in the multiple random access resources as the target random access resource;
if the type of the MT function module of the IAB node to be accessed is a medium-domain MT, determining a sixth random access resource in the multiple random access resources as the target random access resource;
the fourth random access resource is a general random access resource, the fifth random access resource is a random access resource dedicated to the IAB node MT function module, and the sixth random access resource is a general random access resource or a random access resource dedicated to the IAB node MT function module.
19. The IAB node of claim 18, wherein the sixth random access resource comprises one of:
random access resources 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 to-be-accessed IAB node successfully accesses the parent 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 to-be-accessed IAB node fails to access the parent IAB node by using the first random access resource in the second random access process, determining a seventh random access resource in the multiple random access resources as the target random access resource;
wherein, the seventh random access resource is a random access resource dedicated to the IAB node MT function module.
21. The IAB node of claim 20, wherein if the first random access resource is determined to be 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.
22. The IAB node of claim 13, wherein the determining module is specifically configured to:
if the length of the PRACH preamble of the eighth random access resource in the plurality of random access resources is less than or equal to the length of the PRACH preamble of the ninth random access resource in the plurality of random access resources, determining the ninth random access resource as the target random access resource;
if the length of the PRACH preamble of the eighth random access resource is greater than that 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 dedicated to an IAB node MT function module, and the ninth random access resource is a general random access resource.
23. A self-backhauled IAB node, comprising: memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of 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 one of claims 1 to 11.
CN202010581098.XA 2020-06-23 2020-06-23 Method for determining random access resource and self-feedback IAB (inter-integrated access node) Pending CN113840389A (en)

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Citations (6)

* 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
US20190394799A1 (en) * 2018-06-26 2019-12-26 Qualcomm Incorporated Conflict avoidance in random access channel (rach) resources in integrated access and backhaul (iab) networks
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

Patent Citations (6)

* 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
US20190394799A1 (en) * 2018-06-26 2019-12-26 Qualcomm Incorporated Conflict avoidance in random access channel (rach) resources in integrated access and backhaul (iab) networks
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, no. 2, pages 1 - 2 *

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