CN107734600B

CN107734600B - Method for initially accessing terminal to network and related equipment

Info

Publication number: CN107734600B
Application number: CN201610666254.6A
Authority: CN
Inventors: 王磊; 郑方政; 潘学明; 高秋彬
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2019-12-13
Anticipated expiration: 2036-08-12
Also published as: CN107734600A; WO2018028311A1

Abstract

the invention discloses a method for initially accessing a terminal into a network and related equipment, which are used for providing a solution for accessing the terminal into the network in a future mobile communication system. The method comprises the following steps: a terminal determines an attributive TRP group and acquires system information of the TRP group; the terminal determines TRP needing to be accessed and Physical Random Access Channel (PRACH) resource configuration information of the TRP needing to be accessed according to the system information of the affiliated TRP group, wherein the TRP needing to be accessed belongs to the affiliated TRP group; and the terminal initially accesses the TRP needing to be accessed according to the PRACH resource configuration information.

Description

method for initially accessing terminal to network and related equipment

Technical Field

the present invention relates to the field of communications technologies, and in particular, to a method for a terminal to initially access a network and a related device.

background

1) Next generation mobile communication technology

The mobile internet promotes further upgrading of human social information interaction modes, and provides richer business experiences such as augmented reality, virtual reality, Ultra High-Definition (Ultra High-Definition) videos and mobile clouds for users. The further development of the mobile internet will bring the mobile traffic to thousands of times increase in the future, and promote a new revolution of mobile communication technology and industry. The internet of things expands the service range of mobile communication, and extends from person-to-person communication to intelligent interconnection of people and objects, so that the mobile communication technology can penetrate into wider industries and fields. In the future, mobile medical treatment, internet of vehicles, smart home, industrial control, environmental monitoring and the like will promote the explosive growth of internet of things application, and hundreds of millions of devices will access the network to realize real 'everything interconnection'. Meanwhile, a large amount of equipment connection and diversified internet of things services can bring new technical challenges to mobile communication.

with the emergence of new service requirements, higher performance requirements are put on future mobile communication systems, such as higher peak rate, better user experience rate, smaller time delay, higher reliability, higher spectrum efficiency and higher energy consumption efficiency, and the like, and more users need to be supported to access and use various service types. In order to meet the more stringent performance requirements, the transceiving nodes in the future mobile communication network need to have higher distribution density (especially in the hot spot area), support more antenna numbers, support higher frequency bands and larger bandwidths, and the like. When accessing a network, a terminal may need to access a certain sub-bandwidth or a certain beam of a node-allocated bandwidth according to a service requirement.

2) random access process of existing Long Term Evolution (LTE) system

the terminal divides the random access process into contention-based random access and non-contention-based random access according to whether the dedicated resource is allocated. In the contention-based random access process, different terminals can use the same resource; in the non-competitive random access process, different terminals have different resources for random access. Fig. 1 is a diagram illustrating a contention-based random access procedure, and fig. 2 is a diagram illustrating a non-contention random access procedure.

Before the random access based on competition, the terminal completes downlink synchronization through a downlink synchronization signal. The base station carries resource configuration required for random access in a System Information Block (SIB) 2. The whole random access process comprises msg1-msg 4. For non-competitive random access, the base station configures exclusive resources for each accessed terminal, so only msg1 and msg2 are needed to complete the access process. The msg1 is a preamble (preamble) sent by the terminal on a Physical Random Access Channel (PRACH) resource configured by the base station, and the msg2 is Random Access response information including information such as a preamble index (preamble index) and a timing adjustment command (timing Access command). The Msg3 includes a unique identifier of a terminal (UE), and the Msg4 includes a contention resolution flag.

In the existing LTE system, after the terminal completes downlink synchronization and correctly receives a Master Information Block (MIB), an SIB1, and an SIB2, the terminal completes a random access procedure on a resource configured in an SIB 2.

In future wireless communication systems, deployment manners and operation manners of wireless stations are more diversified, for example, one or more wireless stations form a group (group), a terminal needs to reside in the group and access to a certain station when data needs to be transmitted, each station may operate in a different Frequency band, a sub-bandwidth in an operating Frequency band of the station may have different sub-carrier intervals and Orthogonal Frequency Division Multiplexing (OFDM) symbols with different lengths, the terminal may operate in a certain sub-band of the operating Frequency band of the station, and the like, and the terminal may need to access different sub-bands in the operating bandwidth of the station or different beams transmitted by the station, respectively.

However, the process of accessing the network by the terminal in the current LTE system cannot be completely adapted to the requirements of the future mobile communication system.

disclosure of Invention

The embodiment of the invention provides a method for initially accessing a terminal into a network and related equipment, which are used for providing a solution for accessing the terminal into the network in a future mobile communication system.

The embodiment of the invention provides the following specific technical scheme:

In a first aspect, an embodiment of the present invention provides a method for a terminal to initially access a network, where the method includes:

A terminal determines an attributive TRP group and acquires system information of the TRP group;

the terminal determines TRP needing to be accessed and Physical Random Access Channel (PRACH) resource configuration information of the TRP needing to be accessed according to the system information of the affiliated TRP group, wherein the TRP needing to be accessed belongs to the affiliated TRP group;

And the terminal initially accesses the TRP needing to be accessed according to the PRACH resource configuration information.

In a possible embodiment, the initially accessing, by the terminal, the TRP to be accessed according to the PRACH resource configuration information includes:

the terminal determines PRACH resources according to the PRACH resource configuration information and sends PRACH on the PRACH resources;

And the terminal receives a random access response on the TRP needing to be accessed.

in a possible embodiment, the determining, by the terminal, the TRP to be accessed according to the system information of the belonging TRP group includes:

The terminal receives the dedicated synchronizing signal of each TRP of the affiliated TRP group respectively according to the configuration information of the dedicated synchronizing signal of the TRP carried in the system information of the affiliated TRP group;

and the terminal determines the TRP needing to be accessed according to the special synchronous signal of each TRP of the affiliated TRP group.

In a possible embodiment, the determining, by the terminal, the TRP to be accessed according to the dedicated synchronization signal of each TRP in the belonging TRP group includes:

And the terminal determines the maximum value of the signal intensity in the dedicated synchronous signal of each TRP of the attributive TRP group, and determines the TRP corresponding to the maximum value as the TRP needing to be accessed.

In a possible embodiment, the determining, by the terminal, the PRACH resource configuration information of the physical random access channel of the TRP to be accessed according to the system information of the belonging TRP group includes:

the terminal acquires the system information of the TRP needing to be accessed, wherein the system information of the TRP needing to be accessed carries PRACH resource configuration information of the TRP needing to be accessed;

alternatively, the first and second electrodes may be,

And the terminal acquires the PRACH resource configuration information of the TRP needing to be accessed from the system information of the attributive TRP group.

in a possible embodiment, the determining, by the terminal, the belonging TRP group includes:

The terminal receives an initial synchronization signal sent by at least one TRP group, and each TRP group comprises at least one TRP;

and the terminal performs downlink synchronization according to the initial synchronization signal sent by the at least one TRP group and determines the TRP group to which the terminal belongs.

in a second aspect, an embodiment of the present invention provides a method for a terminal to initially access a network, where the method includes:

all or part of TRPs in each sending and receiving point TRP group send initial synchronization signals of the TRP group and system information of the TRP group, the terminal determines an attributive TRP group according to the initial synchronization signals and acquires the system information of the attributive TRP group, determines TRPs needing to be accessed and Physical Random Access Channel (PRACH) resource configuration information of the TRPs needing to be accessed according to the system information of the attributive TRP group, wherein the TRPs needing to be accessed belong to the attributive TRP group;

and the TRP needing to be accessed of the attributive TRP group receives a random access preamble signal sent by the terminal according to the PRACH resource configuration information.

In a possible embodiment, after the TRP of the TRP group to be accessed receives a random access preamble signal sent by the terminal according to the PRACH resource configuration information, the method further includes:

And the TRP needing to be accessed of the attributive TRP group sends a random access response.

in a possible embodiment, after all or part of the TRPs in each transmission reception point TRP group transmit the initial synchronization signal of the TRP group to which the TRP group belongs and the system information of the TRP group to which the TRP group belongs, the method further includes:

And each TRP in each TRP group respectively sends system information of the TRP, and the system information of the TRP carries PRACH resource configuration information of the TRP.

in a possible embodiment, the system information of the TRP group includes PRACH resource configuration information of each TRP belonging to the TRP group.

in a third aspect, an embodiment of the present invention provides a terminal, including:

The first processing module is used for determining an attributive TRP (transmission reception point) group and acquiring system information of the TRP group;

a second processing module, configured to determine, according to the system information of the belonging TRP group, a TRP that needs to be accessed and determine PRACH resource configuration information of a physical random access channel of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the belonging TRP group;

and the third processing module is used for initially accessing the TRP needing to be accessed according to the PRACH resource configuration information.

in a possible implementation manner, the third processing module is specifically configured to:

determining PRACH resources according to the PRACH resource configuration information, and sending PRACH on the PRACH resources;

receiving a random access response on the TRP requiring access.

In a possible implementation manner, the second processing module is specifically configured to:

Respectively receiving the dedicated synchronizing signal of each TRP of the attributive TRP group according to the configuration information of the dedicated synchronizing signal of the TRP carried in the system information of the attributive TRP group;

And determining the TRP needing to be accessed according to the special synchronous signal of each TRP of the belonging TRP group.

and determining the maximum value of the signal intensity in the dedicated synchronization signal of each TRP of the belonging TRP group, and determining the TRP corresponding to the maximum value as the TRP needing to be accessed.

acquiring system information of the TRP needing to be accessed, wherein the system information of the TRP needing to be accessed carries PRACH resource configuration information of the TRP needing to be accessed;

Alternatively, the first and second electrodes may be,

and acquiring the PRACH resource configuration information of the TRP needing to be accessed from the system information of the attributive TRP group.

In a possible implementation manner, the first processing module is specifically configured to:

Receiving an initial synchronization signal transmitted by at least one TRP group, wherein each TRP group comprises at least one TRP;

And performing downlink synchronization according to the initial synchronization signal sent by the at least one TRP group and determining the TRP group to which the terminal belongs.

in a fourth aspect, an embodiment of the present invention provides a method for transmitting a TRP, including:

a sending module, configured to send an initial synchronization signal of an associated TRP group and system information of the associated TRP group, where the terminal determines an associated TRP group according to the initial synchronization signal and acquires the system information of the associated TRP group, and determines a TRP to be accessed and physical random access channel PRACH resource configuration information of the TRP to be accessed according to the system information of the associated TRP group, where the TRP to be accessed belongs to the associated TRP group; and/or

And the receiving module is used for receiving the random access preamble signal sent by the terminal according to the PRACH resource configuration information.

In a possible implementation manner, after the receiving module receives the random access preamble signal sent by the terminal according to the PRACH resource configuration information, the sending module is further configured to: and sending a random access response.

In a possible implementation, the sending module is further configured to:

After an initial synchronization signal of a TRP group and system information of the TRP group are sent, sending the system information of the TRP, wherein the PRACH resource configuration information of the TRP is carried in the system information of the TRP.

in a fifth aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a transceiver, where the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, and the processor reads the program in the memory and executes the following processes according to the program:

determining an attributive TRP (transmission and reception point) group and acquiring system information of the TRP group;

Determining TRP needing to be accessed and determining Physical Random Access Channel (PRACH) resource configuration information of the TRP needing to be accessed according to the system information of the affiliated TRP group, wherein the TRP needing to be accessed belongs to the affiliated TRP group;

and initially accessing the TRP needing to be accessed through a transceiver according to the PRACH resource configuration information.

In a possible implementation manner, the processor determines the PRACH resource according to the PRACH resource configuration information, and transmits the PRACH on the PRACH resource;

instructing the transceiver to receive a random access response on the TRP requiring access.

in a possible embodiment, the processor receives the dedicated synchronization signal of each TRP of the belonging TRP group through the transceiver according to the configuration information of the dedicated synchronization signal of the TRP carried in the system information of the belonging TRP group;

in a possible embodiment, the processor determines a maximum value of signal strength in the dedicated synchronization signal of each TRP of the belonging TRP group, and determines the TRP corresponding to the maximum value as the TRP to be accessed.

In a possible implementation manner, a processor acquires system information of the TRP to be accessed, where the system information of the TRP to be accessed carries PRACH resource configuration information of the TRP to be accessed;

Alternatively, the first and second electrodes may be,

In a possible embodiment, the processor receives an initial synchronization signal transmitted by at least one TRP group through the transceiver, each TRP group including at least one TRP;

in a sixth aspect, an embodiment of the present invention provides a transmission/reception point TRP, including a processor, a memory, and a transceiver, where the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, and the processor reads the program in the memory and executes the following processes according to the program:

sending an initial synchronization signal of an affiliated TRP group and system information of the affiliated TRP group through a transceiver, determining an affiliated TRP group and acquiring the system information of the affiliated TRP group by the terminal according to the initial synchronization signal, determining TRP needing to be accessed and determining Physical Random Access Channel (PRACH) resource configuration information of the TRP needing to be accessed according to the system information of the affiliated TRP group, wherein the TRP needing to be accessed belongs to the affiliated TRP group; and/or

And receiving the random access preamble signal sent by the terminal according to the PRACH resource configuration information through the transceiver.

In a possible implementation manner, after receiving, by the processor, the random access preamble signal sent by the terminal according to the PRACH resource configuration information through the transceiver, the processor sends a random access response through the transceiver.

In a possible embodiment, after the transceiver transmits the initial synchronization signal of the TRP group to which the processor belongs and the system information of the TRP group to which the processor belongs, the transceiver transmits the system information of the TRP, where the system information of the TRP carries PRACH resource configuration information of the TRP.

based on the above technical solution, in the embodiment of the present invention, after determining the TRP group to which the terminal belongs and acquiring the system information of the TRP group, determining the TRP to be accessed and the PRACH resource configuration information of the TRP to be accessed according to the system information of the TRP group, and initially accessing the TRP to be accessed according to the PRACH resource configuration information, thereby providing a solution for a terminal access network in a future mobile communication system.

Drawings

fig. 1 is a diagram illustrating a contention-based random access procedure;

fig. 2 is a diagram illustrating a non-contention random access procedure;

fig. 3 is a flowchart illustrating a method for a terminal to initially access a network according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for another terminal to initially access a network according to an embodiment of the present invention;

Fig. 5 is a schematic view of a terminal initially accessing a TRP according to the first and second embodiments of the present invention;

fig. 6 is a schematic view of a scenario of initial access of a terminal to a TRP according to a third embodiment of the present invention;

Fig. 7 is a schematic view of a scenario of initial access of a terminal to a TRP according to a fourth embodiment of the present invention;

Fig. 8 is a schematic view of a scenario of a terminal initially accessing a TRP according to a fifth embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of TRP structure in an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of another terminal according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another TRP in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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 invention.

in the embodiment of the present invention, as shown in fig. 3, a detailed method flow for a terminal to initially access a network is as follows:

step 301: the terminal determines an attributed Transmission and Reception Point (TRP) group and acquires system information of the TRP group.

In implementation, the specific process of determining the belonging TRP group by the terminal is as follows: a terminal receives an initial synchronization signal sent by at least one TRP group, wherein each TRP group comprises at least one TRP; and the terminal performs downlink synchronization according to the initial synchronization signal sent by the at least one TRP group and determines the TRP group to which the terminal belongs.

Specifically, the terminal detects an initial synchronization signal of at least one TRP group, and selects a TRP group with the strongest signal strength among the at least one TRP group as a TRP group to which the terminal belongs. Here, only the example of selecting the belonging TRP group according to the signal strength is taken as an example, in practical applications, the terminal may also determine the belonging TRP group according to other performance indexes of the initial synchronization signal of the TRP group, and the scope of the present invention is not limited thereto.

In application, the initial synchronization signal of the TRP set may be a single-stage, dual-stage or multi-stage signal. For example, the initial synchronization signals of the TRP include synchronization signal 1 (denoted as sync1) and synchronization signal 2 (denoted as sync 2).

in an implementation, an initial synchronization signal of a TRP group may be used to indicate a TRP group identity.

In practice, the TRP group has any one or more of the following characteristics:

Comprises at least one TRP;

has a unique TRP group identification;

having group-specific (group-specific) synchronization signals and group system information, e.g., sync1 and sync2 for group-specific synchronization signals, MIB and/or SIB-X for groups;

terminals in an IDLE (IDLE) state are allowed to reside in the TRP set.

in practice, the TPR has any one or more of the following characteristics:

the TRP may be a beam (beam) or a subband of a transmitting and receiving node;

Each TRP has a unique identity;

each TRP has a specific physical layer configuration, such as subcarrier spacing, bandwidth, PRACH resources, etc.;

Each TRP has a dedicated (TRP-specific) sync signal and system information of the TRP, for example, the TRP-dedicated sync signal is denoted as sync3, and the system information of the TRP is denoted as SIB-Y;

The terminal in an idle state does not need to recognize the TRP before random access.

In implementation, the terminal determines a downlink timing and a TRP group identity according to the received initial synchronization signal of the TRP group, and receives system information of the TRP group, such as MIB and SIB-X.

In practice, the system information of the TRP set has any one or more of the following characteristics:

the System information of the TRP set is configuration information valid for all TRPs within a System Information Area (SIA) of the TRP set;

the system information of the TRP group contains necessary information for a terminal to detect a dedicated synchronization signal of the TRP;

The system information of the TRP group may include PRACH resource configuration information of each TRP.

Step 302: the terminal determines the TRP needing to be accessed and the PRACH resource configuration information of the TRP needing to be accessed according to the system information of the TRP group to which the terminal belongs, wherein the TRP needing to be accessed belongs to the TRP group to which the terminal belongs.

In a specific embodiment, the terminal determines the TRP to be accessed according to the system information of the TRP group to which the terminal belongs, and specifically includes: the terminal receives the special synchronous signal of each TRP of the attributive TRP group respectively according to the configuration information of the special synchronous signal of the TRP carried in the system information of the attributive TRP group; and the terminal determines the TRP needing to be accessed according to the special synchronous signal of each TRP of the affiliated TRP group.

In another embodiment, the terminal selects one TRP from the belonging TRP group as the TRP to be accessed according to a preset rule, for example, the terminal randomly selects one TRP from the belonging TRP group as the TRP to be accessed.

Optionally, the terminal determines a maximum value of signal strength in the dedicated synchronization signal of each TRP in the belonging TRP group, and determines the TRP corresponding to the maximum value as the TRP to be accessed. Here, only the TRP to be accessed is selected according to the signal strength as an example, in practical applications, the terminal may also be appointed to select the TRP to be accessed according to other performance indexes of the dedicated synchronization signal, and the scope of the present invention is not limited thereto.

Specifically, the terminal receives the system information of the TRP indicated by the dedicated synchronization signal of the TRP, which is indicated as SIB-Y, based on the dedicated synchronization signal of the TRP received. Wherein, SIB-Y may include PRACH resource configuration information of the TRP.

in implementation, the terminal determines the PRACH resource configuration information of the TRP that needs to be accessed according to the system information of the TRP group to which the terminal belongs, which includes, but is not limited to, the following two implementation manners:

firstly, a terminal acquires system information of a TRP needing to be accessed, wherein the system information of the TRP needing to be accessed carries PRACH resource configuration information of the TRP needing to be accessed.

Secondly, the terminal acquires the PRACH resource configuration information of the TRP needing to be accessed from the system information of the affiliated TRP group.

step 303: and the terminal initially accesses the TRP needing to be accessed according to the PRACH resource configuration information.

in implementation, the terminal initially accesses the TRP to be accessed according to the PRACH resource configuration information, which specifically includes: the terminal determines the PRACH resource according to the PRACH resource configuration information, and sends the PRACH to the TRP needing to be accessed on the PRACH resource; and the terminal receives a random access response returned by the TRP needing to be accessed on the TRP needing to be accessed.

specifically, the terminal sends a random access preamble on the PRACH resource of the TRP that needs to be accessed, and the TRP detects the random access preamble on the PRACH resource related to itself, and sends a random access response in the operation bandwidth or in the sub-band or in the beam direction according to the received preamble.

based on the same inventive concept, in the embodiment of the present invention, as shown in fig. 4, a detailed method flow of a terminal initially accessing a network is as follows:

step 401: all or part of TRPs in each TRP group send initial synchronization signals of the TRP group and system information of the TRP group, the terminal determines an attributive TRP group according to the initial synchronization signals and acquires the system information of the attributive TRP group, determines TRPs needing to be accessed and Physical Random Access Channel (PRACH) resource configuration information of the TRPs needing to be accessed according to the system information of the attributive TRP group, wherein the TRPs needing to be accessed belong to the attributive TRP group.

in a specific embodiment, after all or part of the TRPs in each TRP group transmit the initial synchronization signal of the TRP group to which the TRP group belongs and the system information of the TRP group to which the TRP belongs, each TRP in each TRP group respectively broadcasts and transmits the system information of the TRP, and the system information of the TRP carries PRACH resource configuration information of the TRP.

In another embodiment, the system information of the TRP group includes PRACH resource configuration information of each TRP belonging to the TRP group.

Step 402: and the TRP needing to be accessed of the attributive TRP group receives a random access preamble signal sent by the terminal according to the PRACH resource configuration information.

in implementation, after the TRP of the TRP group to which access is required receives a random access preamble signal sent by the terminal according to the PRACH resource configuration information, the TRP of the TRP group to which access is required sends a random access response and sends a random access response.

the following describes a procedure for a terminal to initially access a network in a future mobile communication system in detail through several specific embodiments.

First embodiment

in this embodiment, one TRP group is defined to include only one TRP, and each TRP needs to transmit downlink synchronization signals sync1 and sync2 for the terminal to determine the current TRP group identity and downlink timing. The terminal detects sync1 and sync2 in specific resources, selects sync1 and sync2 with the strongest signal strength as downlink synchronization signals of the resident TRP group according to the received signal strength of each of sync1 and sync2, and determines TRP group identification according to the received sync1 and sync 2. The TRPs within each TRP group need to broadcast System Information (System Information) of the TRP group.

Fig. 5 is a schematic diagram illustrating a scenario in which a terminal initially accesses a TRP. For example, TRP1 needs to transmit System Information in System Information Area (SIA) 1, TRP2 needs to transmit System Information in SIA2, and the like. The system information includes the related information of the downlink synchronization signal sync3, wherein the downlink synchronization signal sync3 is a dedicated synchronization signal for TRP.

The random access procedure of this scenario is illustrated by taking TRP set 1 as an example, where TRP set 1 is the TRP in the SIA1 area shown in fig. 5. The terminal obtains necessary information for detecting sync3 included in the system information, and detects received sync3 based on the necessary information. And the terminal determines a beam of the TRP needing to be accessed or a certain sub-band of the TRP working bandwidth according to the signal intensity of the sync 3.

A certain sub-band of a TRP wave beam or a TRP working bandwidth has independent system information SIB-Y, and the SIB-Y contains PRACH resource configuration information of the beam or the sub-band. And the terminal sends the PRACH on the PRACH resource according to the received PRACH resource configuration information in the SIB-Y.

The TRP detects the received preamble on the beam or subband specific PRACH resource. And the TRP sends a random access response on a beam or a sub-band or a working bandwidth corresponding to the PRACH resource according to the received lead code, and informs the terminal which lead code is successfully received.

the terminal needs to receive the random access response information on the operating bandwidth or subband or beam of the TRP.

Second embodiment

in this particular embodiment, one TRP group contains only one TRP. Each TRP needs to transmit downlink synchronization signals sync1 and sync2 for the terminal to determine TRP group identity and downlink timing.

The terminal detects sync1 and sync2 in specific resources, selects sync1 and sync2 with the strongest signal strength as downlink synchronization signals of the resident TRP group according to the received sync1 and sync2, and determines TRP group identification according to the received sync1 and sync 2.

As shown in fig. 5, the TRP within each TRP group needs to transmit system information of the TRP group, for example, TRP1 needs to transmit system information within SIA1 area, TRP2 needs to transmit system information within SIA2 area. Taking the terminal in SIA1 as an example, assuming that TRP1 does not need to send downlink synchronization signal sync3, it needs to carry PRACH resource configuration information in SIB-X. After detecting the sync1 and the sync2, the terminal determines the TRP identifier which needs to be accessed, and receives the system information MIB and the SIB-X of the TRP according to the timing relationship determined by the sync1 and the sync2 and the TRP identifier.

And the terminal sends the PRACH on the PRACH resource according to the PRACH resource configured in the received system information SIB-X. The TRP detects a received preamble on a PRACH resource configured by the system information SIB-X. If the preamble sent by a certain terminal or terminals is received, the received preamble information is carried in the random access response. The terminal needs to receive the random access response on the operating bandwidth or subband or beam of the TRP.

Third embodiment

In this particular embodiment, it is assumed that multiple TRPs are contained within one TRP group and that all TRPs within a TRP group are synchronized. Each TRP group needs to transmit downlink synchronization signals sync1 and sync2 for the terminal to determine the current TRP group identity and downlink timing. The sync1, sync2 and system information of the TRP group may be transmitted by one or several TRPs within the TRP group. The terminal detects sync1 and sync2 in specific resources, selects sync1 and sync2 with the strongest signal strength as downlink synchronization signals of the resident TRP group according to the received sync1 and sync2, and determines TRP group identification according to the received sync1 and sync 2.

As shown in FIG. 6, the network transmits the system information MIB and SIB-X of the TRP set within the SIA. The terminal detects the reception of sync3 at a specific location according to the configuration information about sync3 in the received SIB-X. And the terminal determines the TRP needing to be accessed according to the strength of the sync3 signal.

For example, the terminal determines that TRP1 needs to be accessed, and then continues to receive system information SIB-Y of TRP 1. The SIB-Y contains PRACH resource configuration information of TRP 1. The PRACH resource configuration information may be PRACH resource configuration information of each beam, or may be PRACH resource configuration information of a certain subband within an operation bandwidth of the TRP 1. And the terminal sends a lead code according to the PRACH resource configuration information in the SIB-Y. The TRP1 detects the received preamble on its own configured PRACH resource. When the TRP1 detects reception of preambles transmitted by 1 or more terminals, the received preamble related information is carried in the random access response. The terminal detects reception of the random access response on the operating bandwidth or sub-band or beam of TRP 1.

Further, PRACH resource configuration information for each TRP may also be sent in SIB-X.

Fourth embodiment

In this embodiment, it is assumed that a plurality of TRPs are contained within one TRP group, and that the TRPs within a TRP group are not all synchronized. The sync1, sync2 and system information of the TRP group may be transmitted by one or several TRPs within the TRP group.

as shown in FIG. 7, the network transmits the system information MIB and SIB-X of the TRP set within the SIA.

the terminal detects the reception of sync3 at a specific location according to the configuration information about sync3 in the received SIB-X. And the terminal determines the TRP needing to be accessed according to the strength of the sync3 signal.

assuming that the terminal determines that TRP1 needs to be accessed, the terminal continues to receive system information SIB-Y of TRP 1. The SIB-Y contains PRACH resource configuration information of TRP 1. The PRACH resource configuration information may be PRACH resource configuration information of each beam, or may be PRACH resource configuration information of a certain subband within an operation bandwidth of the TRP 1. And the terminal sends a lead code according to the PRACH resource configuration information in the SIB-Y. The TRP1 detects the received preamble on the configured PRACH resource.

when the TRP1 detects reception of preambles transmitted by 1 or more terminals, the received preamble related information is carried in the random access response. The terminal detects reception of the random access response information on the operating bandwidth or sub-band or beam of TRP 1.

Fifth embodiment

in this embodiment, it is assumed that a plurality of TRPs are included in one TRP group, a part of TRPs operates in a low frequency band, and a part of TRPs operates in a high frequency band. One or several TRPs operating in a low frequency band transmit sync1, sync2 of a TRP group and system information.

the terminal can complete the selection and the camping of the TRP group by receiving sync1 and sync2 and receive system information MIB and SIB-X of the TRP group.

The terminal receives sync3 according to the configuration regarding sync3 in SIB-X, in which sync3 is transmitted in a high frequency band, and selects TRP of which signal strength of sync3 is strongest as an access TRP.

as shown in fig. 8, assuming that the terminal determines that TRP1 needs to be accessed, the terminal continues to receive system information SIB-Y of TRP1 in the high frequency band. The SIB-Y contains PRACH resource configuration information of TRP 1. The PRACH resource configuration information may be PRACH resource configuration information of each beam, or may be PRACH resource configuration information of a certain subband within an operation bandwidth of the TRP 1. And the terminal sends a lead code according to the PRACH resource configuration information in the SIB-Y. The TRP1 detects the received preamble on the configured PRACH resource. When the TRP1 detects reception of preambles transmitted by 1 or more terminals, the received preamble related information is carried in the random access response. The terminal detects reception of the random access response information on the operating bandwidth or sub-band or beam of TRP 1.

in all the above embodiments, the initial synchronization signal of the TRP group may be single-stage, dual-stage or multi-stage, and sync1 and sync2 are just one possible implementation of the downlink synchronization signal. Also, the dedicated synchronization signal for the TRP may be single-stage, dual-stage, or multi-stage, and embodiments of the present invention are not limited thereto.

in addition, the system information MIB and SIB-X of the TRP group, and the system information SIB-Y of the TRP are only for convenience of description, and do not exclude the possibility of description using other names.

Based on the same inventive concept, the embodiment of the present invention provides a terminal, and specific implementation of the terminal may refer to the description of the method embodiment, and repeated details are not described again, as shown in fig. 9, the terminal mainly includes:

a first processing module 901, configured to determine an attributed TRP group of a sending and receiving point, and acquire system information of the TRP group;

A second processing module 902, configured to determine, according to the system information of the belonging TRP group, a TRP that needs to be accessed and determine PRACH resource configuration information of a physical random access channel of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the belonging TRP group;

A third processing module 903, configured to initially access the TRP that needs to be accessed according to the PRACH resource configuration information.

Receiving a random access response on the TRP requiring access.

alternatively, the first and second electrodes may be,

based on the same inventive concept, embodiments of the present invention provide a TRP, and specific implementations of the TRP may refer to descriptions in the method embodiment section, and repeated details are not repeated, as shown in fig. 10, where the TRP mainly includes:

A sending module 1001, configured to send an initial synchronization signal of an affiliated TRP group and system information of the affiliated TRP group, where the terminal determines an affiliated TRP group according to the initial synchronization signal and acquires the system information of the affiliated TRP group, and determines a TRP to be accessed according to the system information of the affiliated TRP group and determines PRACH resource configuration information of a physical random access channel of the TRP to be accessed, where the TRP to be accessed belongs to the affiliated TRP group; and/or

A receiving module 1002, configured to receive a random access preamble signal sent by the terminal according to the PRACH resource configuration information.

In a possible implementation, the sending module is further configured to:

Based on the same inventive concept, an embodiment of the present invention provides another terminal, and specific implementation of the terminal may refer to description of the method embodiment, and repeated parts are not repeated, as shown in fig. 11, the terminal mainly includes a processor 1101, a memory 1102, and a transceiver 1103, where the transceiver 1103 receives and transmits data under control of the processor 1101, the memory 1102 stores a preset program, the processor 1101 reads the program in the memory 1102, and executes the following processes according to the program:

In a possible embodiment, the processor 1101 determines a PRACH resource according to the PRACH resource configuration information, and sends a PRACH on the PRACH resource;

In a possible embodiment, the processor 1101 receives, through the transceiver, the dedicated synchronization signal of each TRP of the belonging TRP group according to the configuration information of the dedicated synchronization signal of the TRP carried in the system information of the belonging TRP group;

In a possible embodiment, the processor 1101 determines a maximum value of signal strength in the dedicated synchronization signal of each TRP of the belonging TRP group, and determines the TRP corresponding to the maximum value as the TRP required to be accessed.

in a possible embodiment, the processor 1101 acquires system information of the TRP required to be accessed, where the system information of the TRP required to be accessed carries PRACH resource configuration information of the TRP required to be accessed;

alternatively, the first and second electrodes may be,

in a possible embodiment, the processor 1101 receives an initial synchronization signal transmitted by at least one TRP group through the transceiver 1103, each TRP group including at least one TRP;

based on the same inventive concept, an embodiment of the present invention further provides another TRP, where specific implementation of the TRP may refer to descriptions in the method embodiment, and repeated parts are not repeated, as shown in fig. 12, the TRP mainly includes a processor 1201, a memory 1202, and a transceiver 1203, where the transceiver 1203 receives and transmits data under the control of the processor 1201, a preset program is stored in the memory 1202, and the processor 1201 reads the program in the memory 1202 and executes the following processes according to the program:

Sending an initial synchronization signal of an affiliated TRP group and system information of the affiliated TRP group through a transceiver 1203, determining an affiliated TRP group and acquiring the system information of the affiliated TRP group by the terminal according to the initial synchronization signal, determining a TRP to be accessed and determining Physical Random Access Channel (PRACH) resource configuration information of the TRP to be accessed according to the system information of the affiliated TRP group, wherein the TRP to be accessed belongs to the affiliated TRP group; and/or

And receiving a random access preamble signal sent by the terminal according to the PRACH resource configuration information through the transceiver 1203.

in a possible embodiment, the processor 1201 receives, through the transceiver 1203, a random access preamble signal sent by the terminal according to the PRACH resource configuration information, and then sends a random access response through the transceiver.

In a possible embodiment, after the transceiver 1203 transmits the initial synchronization signal of the TRP group to which the processor 1201 belongs and the system information of the TRP group to which the processor 1201 belongs, the transceiver 1203 transmits the system information of the TRP, where the system information of the TRP carries the PRACH resource configuration information of the TRP.

as will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

it will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for a terminal to initially access a network is characterized by comprising the following steps:

the terminal is initially accessed to the TRP needing to be accessed according to the PRACH resource configuration information;

The terminal determines the TRP needing to be accessed according to the system information of the affiliated TRP group, and the method comprises the following steps:

2. the method of claim 1, wherein the terminal initially accesses the TRP requiring access according to the PRACH resource configuration information, comprising:

3. the method of claim 1, wherein the terminal determining the TRP to be accessed according to the dedicated synchronization signal for each TRP of the home TRP set comprises:

4. The method of claim 1 or 2, wherein the determining, by the terminal, the Physical Random Access Channel (PRACH) resource configuration information of the TRP to be accessed according to the system information of the belonging TRP group comprises:

Alternatively, the first and second electrodes may be,

5. The method of claim 1 or 2, wherein the terminal determining a home set of transmission reception points, TRPs, comprises:

6. A method for a terminal to initially access a network is characterized by comprising the following steps:

the TRP needing to be accessed of the attributive TRP group receives a random access preamble signal sent by the terminal according to the PRACH resource configuration information;

The determining the TRP needing to be accessed according to the system information of the affiliated TRP group comprises the following steps: respectively receiving the dedicated synchronizing signal of each TRP of the attributive TRP group according to the configuration information of the dedicated synchronizing signal of the TRP carried in the system information of the attributive TRP group; and determining the TRP needing to be accessed according to the special synchronous signal of each TRP of the belonging TRP group.

7. the method of claim 6, wherein after the TRP of the assigned TRP group needing access receives a random access preamble signal sent by the terminal according to the PRACH resource configuration information, the method further comprises:

8. The method of claim 6 or 7, wherein after all or part of TRPs in each transmission reception point TRP group transmit an initial synchronization signal of the TRP group to which the TRP group belongs and system information of the TRP group to which the TRP group belongs, the method further comprises:

9. The method of claim 6 or 7, wherein the system information of the TRP group comprises PRACH resource configuration information of each TRP belonging to the TRP group.

10. A terminal, comprising:

A third processing module, configured to initially access the TRP that needs to be accessed according to the PRACH resource configuration information;

The second processing module is specifically configured to:

11. the terminal of claim 10, wherein the third processing module is specifically configured to:

receiving a random access response on the TRP requiring access.

12. the terminal of claim 10, wherein the second processing module is specifically configured to:

13. the terminal according to claim 10 or 11, wherein the second processing module is specifically configured to:

Alternatively, the first and second electrodes may be,

14. The terminal according to claim 10 or 11, wherein the first processing module is specifically configured to:

15. A transmission reception point, TRP, comprising:

A sending module, configured to send an initial synchronization signal of an associated TRP group and system information of the associated TRP group, determine, by a terminal, an associated TRP group according to the initial synchronization signal and acquire the system information of the associated TRP group, determine, according to the system information of the associated TRP group, a TRP to be accessed and physical random access channel PRACH resource configuration information of the TRP to be accessed, where the TRP to be accessed belongs to the associated TRP group; and/or

A receiving module, configured to receive a random access preamble signal sent by a terminal according to the PRACH resource configuration information;

16. the TRP of claim 15, wherein the receiving module, after receiving a random access preamble signal transmitted by the terminal according to the PRACH resource configuration information, the transmitting module is further configured to: and sending a random access response.

17. the TRP of claim 15 or 16, wherein the transmitting module is further configured to:

18. The TRP of claim 15 or 16, wherein the system information of the TRP group includes PRACH resource configuration information for each TRP belonging to the TRP group.