WO2018028311A1

WO2018028311A1 - Method for terminal to initially access network and relevant device

Info

Publication number: WO2018028311A1
Application number: PCT/CN2017/089215
Authority: WO
Inventors: 王磊; 郑方政; 潘学明; 高秋彬
Original assignee: 电信科学技术研究院
Priority date: 2016-08-12
Filing date: 2017-06-20
Publication date: 2018-02-15
Also published as: CN107734600B; CN107734600A

Abstract

Disclosed are a method for a terminal to initially access a network and a relevant device, wherein same are used to provide a solution for a terminal to access a network in a future mobile communication system. The method comprises: a terminal determining a transmitting/receiving point (TRP) group to which same belongs, and obtaining system information about the TRP group; the terminal determining, according to the system information about the TRP group to which same belongs, a TRP needing to be accessed, and determining physical random access channel (PRACH) resource configuration information about the TRP needing to be accessed, wherein the TRP needing to be accessed belongs to the TRP group to which same belongs; and according to the PRACH resource configuration information, the terminal initially accessing the TRP needing to be accessed.

Description

Method for initial accessing network of terminal and related equipment

The present application claims priority to Chinese Patent Application No. 201610666254.6, entitled "A Method for Terminal Initial Access Network and Related Equipment", filed on August 12, 2016, the entire contents of which are incorporated by reference. Combined in this application.

Technical field

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

Background technique

1) Next generation mobile communication technology

The mobile Internet will promote the further upgrading of human social information interaction methods, providing users with a richer business experience such as augmented reality, virtual reality, Ultra High-Definition video, mobile cloud and so on. The further development of the mobile Internet will bring about a thousand times increase in mobile traffic in the future, and promote a new round of changes in mobile communication technologies and industries. The Internet of Things expands the range of services for mobile communications, from human-to-human communication to the intelligent interconnection of people and things, things and things, enabling mobile communication technologies to penetrate into a wider range of industries and fields. In the future, mobile medical, car networking, smart home, industrial control, environmental monitoring, etc. will promote the explosive growth of IoT applications, and hundreds of billions of devices will access the network to achieve a true “Internet of Everything”. At the same time, massive device connectivity and diverse IoT services will also bring new technical challenges to mobile communications.

With the emergence of new business requirements, higher performance requirements for future mobile communication systems are proposed, such as higher peak rates, better user experience rates, smaller latency, higher reliability, and higher Spectrum efficiency and higher energy efficiency, etc., and need to support more user access and use various types of services. In order to meet more stringent performance requirements, transceiver nodes in future mobile communication networks need to have higher distribution density (especially hotspot areas), support more antennas, support higher frequency bands and larger bandwidths. When a terminal accesses a network, it may need to access a certain sub-bandwidth or a certain beam of the allocated bandwidth of the node according to service requirements.

2) Existing Long Term Evolution (LTE) system random access process

The terminal divides the random access procedure into contention-based random access and non-contention random access according to whether dedicated resources are allocated. In a contention-based random access procedure, different terminals may use the same resource; in a non-contention random access procedure, different terminals use different resources for random access. FIG. 1 is a schematic diagram of a contention-based random access procedure, and FIG. 2 is a schematic diagram of a non-contention random access procedure.

Before the contention based random access, the terminal completes downlink synchronization through the downlink synchronization signal. Base station in system message block The System Information Block (SIB) 2 carries the resource configuration required for random access. The entire random access procedure includes msg1-msg4. 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 sent by the terminal on a physical random access channel (PRACH) resource configured by the base station, and the msg2 includes a preamble index and a timing advance command. ) Random access response information of information. The Msg3 includes a unique identifier of the terminal (User Equipment, UE), and the content resolution flag is included in the msg4.

In the existing LTE system, after the terminal completes the downlink synchronization and correctly receives the master information block (MIB), the SIB1, and the SIB2, the terminal completes the random access procedure on the resources configured in the SIB2.

In the future wireless communication system, the deployment mode and working mode of the wireless station are more diverse. For example, one or more wireless stations form a group, and the terminal needs to reside in the group and access to a certain when the data needs to be transmitted. Sites, each site can work in different frequency bands. The sub-bandwidth in the working frequency band of the site may have different sub-carrier spacing and different lengths of Orthogonal Frequency Division Multiplexing (OFDM) symbols. The terminal may Working on a sub-band of the working frequency band of the station, the terminal may need to access different sub-bands within the working bandwidth of the station or different beams sent by the station.

However, the process of the terminal accessing the network in the current LTE system cannot fully meet the requirements of the future mobile communication system.

Summary of the invention

The embodiments of the present invention provide a method for a terminal to initially access a network and related devices, which are used to provide a solution for a terminal access network in a future mobile communication system.

The specific technical solutions provided by the embodiments of the present invention are as follows:

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

The terminal determines a home sending and receiving point TRP group, and acquires system information of the TRP group;

Determining, by the terminal, the TRP that needs to be accessed according to the system information of the belonging TRP group, and determining the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the The belonging TRP group;

The terminal initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information.

In a possible implementation, the terminal initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information, including:

Determining, by the terminal, the PRACH resource according to the PRACH resource configuration information, and sending the PRACH on the PRACH resource;

The terminal receives a random access response on the TRP that needs to be accessed.

In a possible implementation manner, the terminal determines, according to the system information of the home TRP group, the TRP that needs to be accessed, including:

Receiving, by the terminal, 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;

The terminal determines the TRP that needs to be accessed according to a dedicated synchronization signal of each TRP of the belonging TRP group.

In a possible implementation manner, the determining, by the terminal, the TRP that needs to be accessed according to the dedicated synchronization signal of each TRP of the belonging TRP group, includes:

The terminal determines the maximum value of the 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 that needs to be accessed.

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

The terminal acquires the system information of the TRP that needs to be accessed, and the system information of the TRP that needs to be accessed carries the PRACH resource configuration information of the TRP that needs to be accessed;

or,

The terminal obtains the PRACH resource configuration information of the TRP that needs to be accessed from the system information of the home TRP group.

In a possible implementation, the terminal determines the home sending and receiving point TRP group, including:

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

The terminal performs downlink synchronization according to the initial synchronization signal sent by the at least one TRP group and determines a 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, including:

The initial synchronization signal of the TRP group to which all or part of the TRPs in each of the transmitting and receiving TRP groups are transmitted and the system information of the associated TRP group, the terminal determines the belonging TRP group according to the initial synchronization signal, and acquires the Determining, by the system information of the belonging TRP group, the TRP that needs to be accessed according to the system information of the belonging TRP group, and determining the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the required The incoming TRP belongs to the belonging TRP group;

The TRP that needs to be accessed by the home TRP group receives a random access preamble signal that is sent by the terminal according to the PRACH resource configuration information.

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

The TRP of the belonging TRP group that needs to access sends a random access response.

In a possible implementation, after 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:

Each TRP in each of the TRP groups separately sends system information of the TRP, where the system information of the TRP carries PRACH resource configuration information of the TRP.

In a possible implementation manner, the system information of the TRP group includes PRACH resource configuration information of each TRP that belongs to the TRP group.

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

a first processing module, configured to determine a home sending and receiving point TRP group, and obtain 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 a physical random access channel (PRACH) resource configuration information of the TRP that needs to be accessed, where the required access is required. The TRP belongs to the belonging TRP group;

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

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

Determining a PRACH resource according to the PRACH resource configuration information, and transmitting a PRACH on the PRACH resource;

Receiving a random access response on the TRP that needs to be accessed.

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

Receiving, according to the configuration information of the dedicated synchronization signal of the TRP carried in the system information of the belonging TRP group, respectively, receiving a dedicated synchronization signal of each TRP of the belonging TRP group;

Determining the TRP that needs to be accessed according to a dedicated synchronization signal of each TRP of the belonging TRP group.

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

Obtaining the system information of the TRP that needs to be accessed, where the system information of the TRP that needs to be accessed carries the PRACH resource configuration information of the TRP that needs to be accessed;

or,

The PRACH resource configuration information of the TRP that needs to be accessed is obtained from the system information of the belonging TRP group.

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

Receiving an initial synchronization signal sent by at least one TRP group, each TRP group including at least one TRP;

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

In a fourth aspect, an embodiment of the present invention provides a sending and receiving point TRP, including:

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

The receiving module is configured to receive a 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 that is sent by the terminal according to the PRACH resource configuration information, the sending module is further configured to: send a random access response.

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

After transmitting the initial synchronization signal of the associated TRP group and the system information of the associated TRP group, the system information of the TRP is sent, and the system information of the TRP carries the PRACH resource configuration 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, wherein the transceiver receives and transmits data under the control of the processor, and the preset program is stored in the memory, and the processing is performed. The program reads the program in the memory and executes the following process according to the program:

Determining a home transmission and reception point TRP group, and acquiring system information of the TRP group;

Determining, according to the system information of the belonging TRP group, a TRP that needs to be accessed, and determining a physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the belonging TRP group;

And initially accessing the TRP that needs to be accessed by the transceiver according to the PRACH resource configuration information.

In a possible implementation, the processor determines a PRACH resource according to the PRACH resource configuration information, and sends a PRACH on the PRACH resource.

Instructing the transceiver to receive a random access response on the TRP that needs to be accessed.

In a possible implementation, the processor receives, according to the configuration information of the dedicated synchronization signal of the TRP carried in the system information of the belonging TRP group, the dedicated synchronization signal of each TRP of the belonging TRP group by the transceiver.

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

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

or,

In a possible implementation, the processor receives, by the transceiver, an initial synchronization signal sent by at least one TRP group, where each TRP group includes at least one TRP;

In a sixth aspect, an embodiment of the present invention provides a transmitting and receiving point TRP, including a processor, a memory, and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the preset program is stored in the memory, and the processing is performed. The program reads the program in the memory and executes the following process according to the program:

Receiving, by the transceiver, the initial synchronization signal of the associated TRP group and the system information of the associated TRP group, the terminal determines the home TRP group according to the initial synchronization signal, and acquires system information of the belonging TRP group, according to the The system information of the belonging TRP group determines the TRP that needs to be accessed, and the physical random access channel PRACH resource configuration information that determines the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the belonging TRP group. ;and / or

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

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

In a possible implementation, the processor sends the system information of the TRP through the transceiver after the initial synchronization signal of the associated TRP group and the system information of the associated TRP group are sent by the transceiver, where the TRP system information is carried. PRACH resource configuration information of the TRP.

Based on the foregoing technical solution, in the embodiment of the present invention, after the terminal determines the home TRP group and obtains the system information of the TRP group, the terminal determines the TRP to be accessed according to the system information of the TRP group, and determines the PRACH of the TRP to be accessed. The resource configuration information initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information, thereby providing a solution for the terminal access network in the future mobile communication system.

DRAWINGS

1 is a schematic diagram of a contention based random access procedure;

2 is a schematic diagram of a non-contention random access procedure;

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

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

FIG. 5 is a schematic diagram of a scenario in which a terminal initially accesses a TRP according to the first and second embodiments of the present invention;

FIG. 6 is a schematic diagram of a scenario in which a terminal initially accesses a TRP according to a third embodiment of the present invention;

FIG. 7 is a schematic diagram of a scenario in which a terminal initially accesses a TRP according to a fourth embodiment of the present invention;

FIG. 8 is a schematic diagram of a scenario in which a terminal initially accesses 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 structural diagram of a TRP according to 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 according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should be understood that, in the embodiment of the present invention, the user equipment (User Equipment, UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" The telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or It is an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, and the present invention is not limited thereto.

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

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

Step 301: The terminal determines a transmission and reception point (TRP) group of the home, and acquires system information of the TRP group.

In the implementation, the specific process of the terminal determining the home TRP group is: the terminal receives the initial synchronization signal sent by the at least one TRP group, and each TRP group includes at least one TRP; the terminal performs downlink synchronization according to the initial synchronization signal sent by the at least one TRP group. And determine the TRP group to which the terminal belongs.

Specifically, the terminal detects an initial synchronization signal of the at least one TRP group, and selects a TRP group with the strongest signal strength in the at least one TRP group as the TRP group to which the terminal belongs. For example, the TRP group that is selected according to the signal strength is taken as an example. In actual applications, the TRP group that the terminal determines to belong to the original synchronization signal of the TRP group may be used as the basis for determining the belonging TRP group. The protection scope of the present invention is not This is a limitation.

In the application, the initial synchronization signal of the TRP group may be a single-stage, two-level or multi-level signal. For example, the initial synchronization signal of the TRP includes a synchronization signal 1 (denoted as sync1) and a synchronization signal 2 (denoted as sync2).

In implementation, the initial synchronization signal of the TRP group can be used to indicate the TRP group identification.

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

Containing at least one TRP;

Have a unique TRP group ID;

System information having a group-specific synchronization signal and a group, for example, group-specific synchronization signals are sync1 and sync2, and system information of the group is MIB and/or SIB-X;

Terminals that allow idle (IDLE) state reside in the TRP group.

In implementation, the TPR has any one or more of the following characteristics:

The TRP can be a beam or subband of a transmitting and receiving node;

Each TRP has a unique identifier;

Each TRP has a specific physical layer configuration, such as subcarrier spacing, bandwidth, PRACH resources, and the like;

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

A terminal in an idle state does not need to recognize a TRP before random access.

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

In implementation, the system information of the TRP group has any one or more of the following characteristics:

The system information of the TRP group is configuration information that is valid for all terminals in the system information area (SIA) of the TRP group;

The system information of the TRP group contains necessary information for the terminal to detect the 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 to be accessed according to the system information of the belonging TRP group, and determines the PRACH resource configuration information of the TRP that needs to be accessed. The TRP that needs to be accessed belongs to the belonging TRP group.

In a specific implementation, the terminal determines the TRP to be accessed according to the system information of the belonging TRP group. Specifically, the terminal separately receives the belonging according to the configuration information of the dedicated synchronization signal of the TRP carried in the system information of the belonging TRP group. The dedicated synchronization signal of each TRP of the TRP group; the terminal determines the TRP to be accessed according to the dedicated synchronization signal of each TRP of the belonging TRP group.

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

Optionally, the terminal determines a maximum value of the 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 that needs to be accessed. For example, the TRP that needs to be accessed according to the signal strength is taken as an example. In an actual application, the terminal may also be configured to select a TRP to be accessed according to other performance indicators of the dedicated synchronization signal, and the protection scope of the present invention is not For the limit.

Specifically, the terminal receives the system information of the TRP indicated by the dedicated synchronization signal of the TRP according to the received dedicated synchronization signal of the TRP, and is represented as SIB-Y. The SIB-Y may include PRACH resource configuration information of the TRP.

In the implementation, the terminal determines the PRACH resource configuration information of the TRP that needs to be accessed according to the system information of the belonging TRP group, including but not limited to the following two implementation manners:

First, the terminal acquires the system information of the TRP that needs to be accessed, and the system information of the TRP that needs to be accessed carries the PRACH resource configuration information of the TRP that needs to be accessed.

Second, the terminal obtains the PRACH resource configuration information of the TRP that needs to be accessed from the system information of the home TRP group.

Step 303: The terminal initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information.

In an implementation, the terminal initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information, where the terminal determines the PRACH resource according to the PRACH resource configuration information, and sends a PRACH to the TRP that needs to be accessed on the PRACH resource; The TRP that needs to access receives the random access response returned by the TRP that needs 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 associated with the TRP, and operates the bandwidth according to the received preamble or A random access response is sent in the subband or beam direction.

Based on the same inventive concept, in the embodiment of the present invention, as shown in FIG. 4, the detailed method for the terminal to initially access the network is as follows:

Step 401: All or part of the TRPs in each TRP group send the initial synchronization signal of the associated TRP group and the system information of the associated TRP group, and the terminal determines the belonging TRP group according to the initial synchronization signal and acquires the Determining, by the system information of the belonging TRP group, the TRP that needs to be accessed according to the system information of the belonging TRP group, and determining the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the required The incoming TRP belongs to the belonging TRP group.

In a specific implementation, after all or part of the TRPs in each TRP group send the initial synchronization signal of the associated TRP group and the system information of the associated TRP group, each TRP in each TRP group broadcasts the TRP separately. System information, the system information of the TRP carries the PRACH resource configuration information of the TRP.

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

Step 402: The TRP that needs to be accessed by the home TRP group receives a random access preamble signal that is sent by the terminal according to the PRACH resource configuration information.

In the implementation, after the TRP that needs to be accessed by the home TRP group receives the random access preamble signal sent by the terminal according to the PRACH resource configuration information, the required access of the belonging TRP group is required. The TRP sends a random access response to send a random access response.

The process of initially accessing a network by a terminal in a future mobile communication system will be described in detail below through several specific embodiments.

First specific embodiment

In this embodiment, a TRP group is defined to include only one TRP, and each TRP needs to send downlink synchronization signals sync1 and sync2 for the terminal to determine the current TRP group identifier and downlink timing. The terminal detects sync1 and sync2 at a specific resource, and according to the received signal strength of each sync1 and sync2, selects sync1 and sync2 with the strongest signal strength as the downlink synchronization signal of the resident TRP group, and according to the received sync1 and sync2. Determine the TRP group ID. The TRP in each TRP group needs to broadcast the system information of the TRP group.

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

The random access procedure in this scenario is described by taking TRP group 1 as an example. The TRP group 1 is a TRP in the SIA1 area shown in FIG. The terminal obtains necessary information for detecting sync3 included in the system information, and detects according to the necessary information. Receive sync3. The terminal determines the beam of the TRP to be accessed or a certain subband of the TRP working bandwidth according to the strength of the signal of the sync3.

The sub-band of the TRP or the TRP working bandwidth has independent system information SIB-Y, and the SIB-Y includes the PRACH resource configuration information of the beam or the sub-band. 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. The TRP sends a random access response on the beam or subband or working bandwidth corresponding to the PRACH resource according to the received preamble, and informs the terminal which preamble is successfully received.

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

Second specific embodiment

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

The terminal detects sync1 and sync2 at a specific resource, and selects sync1 and sync2 with the strongest signal strength as the downlink synchronization signal of the resident TRP group according to the received sync1 and sync2, and determines the TRP group identifier according to the received sync1 and sync2.

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

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

Third specific embodiment

In this particular embodiment, it is assumed that a TRP group contains multiple TRPs, and all TRPs within the TRP group are synchronized. Then, each TRP group needs to send downlink synchronization signals sync1 and sync2 for the terminal to determine the current TRP group identifier and downlink timing. The sync1, sync2, and system information of the TRP group can be sent by one or several TRPs in the TRP group. The terminal detects sync1 and sync2 in a specific resource, and selects sync1 and sync2 with the strongest signal strength as the downlink synchronization signal of the resident TRP group according to the received sync1 and sync2, and determines the TRP group identifier according to the received sync1 and sync2. .

As shown in FIG. 6, the network transmits the system information MIB and SIB-X of the TRP group in 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. The terminal is based on the sync3 signal Strength and weakness, determine the TRP that needs to be accessed.

For example, if the terminal determines that it needs to access TRP1, it continues to receive the system information SIB-Y of TRP1. The SIB-Y contains the PRACH resource configuration information of the TRP1. 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 the operating bandwidth of the TRP1. The terminal transmits the preamble according to the PRACH resource configuration information in the SIB-Y. The TRP1 detects the receiving preamble on the configured PRACH resource. When the TRP1 detects that the preamble sent by one or more terminals is received, the received preamble related information is carried in the random access response. The terminal detects a random access response on the working bandwidth or subband or beam of the TRP1.

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

Fourth specific embodiment

In this embodiment, it is assumed that a TRP group contains multiple TRPs, and the TRPs in the TRP group are not all synchronized. The sync1, sync2, and system information of the TRP group can be sent by one or several TRPs in the TRP group.

As shown in FIG. 7, the network transmits the system information MIB and SIB-X of the TRP group in 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. The terminal determines the TRP to be accessed according to the strength of the sync3 signal.

Assuming that the terminal determines that it needs to access TRP1, the terminal continues to receive the system information SIB-Y of TRP1. The SIB-Y contains the PRACH resource configuration information of the TRP1. 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 the operating bandwidth of the TRP1. The terminal transmits the preamble 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 that the preamble sent by one or more terminals is received, the received preamble related information is carried in the random access response. The terminal detects the received random access response information on the working bandwidth or subband or beam of the TRP1.

Fifth specific embodiment

In this embodiment, it is assumed that one TRP group contains multiple TRPs, some TRPs operate in a low frequency band, and some TRPs operate in a high frequency band. One or several TRPs operating in the low frequency band send sync1, sync2, and system information of the TRP group.

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

The terminal receives sync3 according to the configuration of sync3 in SIB-X, where sync3 is transmitted in the high frequency band, and the TRP with the strongest signal strength of sync3 is selected as the access TRP.

As shown in FIG. 8, assuming that the terminal determines that TRP1 needs to be accessed, the terminal continues to receive the system information SIB-Y of the TRP1 in the high frequency band. The SIB-Y contains the PRACH resource configuration information of the TRP1. 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 the operating bandwidth of the TRP1. The terminal transmits the preamble 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 that the preamble sent by one or more terminals is received, the received preamble related information is carried in the random access response. The terminal detects the received random access response information on the working bandwidth or subband or beam of the TRP1.

In all of the above specific embodiments, the initial synchronization signal of the TRP group may be single-stage, two-level or multi-stage, and sync1 and sync2 are only possible implementations of a downlink synchronization signal. Similarly, the dedicated synchronization signal of the TRP may be single-stage, dual-stage or multi-level, which is not limited in the embodiment of the present invention.

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

Based on the same inventive concept, a terminal is provided in the embodiment of the present invention. For the specific implementation of the terminal, refer to the description of the method embodiment. The repeated description is not repeated. As shown in FIG. 9, the terminal mainly includes:

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

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

The third processing module 903 is 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 that needs to be accessed.

or,

Based on the same inventive concept, an embodiment of the present invention provides a TRP. For details of the implementation of the TRP, refer to the description of the method embodiment. The repeated description is not repeated. As shown in FIG. 10, the TRP mainly includes:

The sending module 1001 is configured to send an initial synchronization signal of the associated TRP group and system information of the associated TRP group, and the terminal determines the home TRP group according to the initial synchronization signal, and acquires system information of the belonging TRP group. Determining, according to the system information of the belonging TRP group, a TRP that needs to be accessed, and determining a physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the belonging TRP group; and/or

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

Based on the same inventive concept, an embodiment of the present invention provides another terminal. For details about the implementation of the terminal, refer to the description of the method embodiment. The details are not repeated here. As shown in FIG. 11, the terminal mainly includes a processor 1101. The memory 1102 and the transceiver 1103, wherein the transceiver 1103 receives and transmits data under the control of the processor 1101, the memory 1102 stores a preset program, and the processor 1101 reads the program in the memory 1102 and executes according to the program. The following process:

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

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

In a possible implementation, the processor 1101 acquires the system information of the TRP that needs to be accessed, and the system information of the TRP that needs to be accessed carries the PRACH resource configuration information of the TRP that needs to be accessed;

or,

In a possible implementation, the processor 1101 receives, by the transceiver 1103, an initial synchronization signal sent by at least one TRP group, where each TRP group includes at least one TRP;

Based on the same inventive concept, the embodiment of the present invention further provides another TRP. For the specific implementation of the TRP, refer to the description of the method embodiment. The repeated description is not repeated. As shown in FIG. 12, the TRP mainly includes a processor. 1201, a memory 1202, and a transceiver 1203, wherein the transceiver 1203 receives and transmits data under the control of the processor 1201, the memory 1202 stores a preset program, and the processor 1201 reads the program in the memory 1202, and executes according to the program. The following process:

The initial synchronization signal of the associated TRP group and the system information of the associated TRP group are transmitted by the transceiver 1203, and the terminal determines the home TRP group according to the initial synchronization signal, and acquires system information of the belonging TRP group, according to The system information of the belonging TRP group determines the TRP that needs to be accessed, and the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the belonging TRP. Group; and/or

The random access preamble signal sent by the terminal according to the PRACH resource configuration information is received by the transceiver 1203.

In a possible implementation manner, after receiving the random access preamble signal sent by the terminal according to the PRACH resource configuration information by the transceiver 1203, the processor 1201 sends a random access response through the transceiver.

In a possible implementation, the processor 1201 sends the system information of the TRP through the transceiver 1203 after transmitting the initial synchronization signal of the associated TRP group and the system information of the associated TRP group by the transceiver 1203, the TRP system. The information carries the PRACH resource configuration information of the TRP.

Those skilled in the art will appreciate that embodiments of the present invention can 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 a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A method for initially accessing a network by a terminal, comprising:

The terminal determines a home sending and receiving point TRP group, and acquires system information of the TRP group;

Determining, by the terminal, the TRP that needs to be accessed according to the system information of the belonging TRP group, and determining the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the TRP that needs to be accessed belongs to the The belonging TRP group;

The terminal initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information.
The method according to claim 1, wherein the terminal initially accesses the TRP that needs to be accessed according to the PRACH resource configuration information, and includes:

Determining, by the terminal, the PRACH resource according to the PRACH resource configuration information, and sending the PRACH on the PRACH resource;

The terminal receives a random access response on the TRP that needs to be accessed.
The method according to claim 1 or 2, wherein the terminal determines the TRP to be accessed according to the system information of the belonging TRP group, including:

Receiving, by the terminal, 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;

The terminal determines the TRP that needs to be accessed according to a dedicated synchronization signal of each TRP of the belonging TRP group.
The method according to claim 3, wherein the determining, by the terminal, the TRP that needs to be accessed according to the dedicated synchronization signal of each TRP of the belonging TRP group includes:

The terminal determines the maximum value of the 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 that needs to be accessed.
The method according to claim 1 or 2, wherein the determining, by the terminal, the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed according to the system information of the belonging TRP group, includes:

The terminal acquires the system information of the TRP that needs to be accessed, and the system information of the TRP that needs to be accessed carries the PRACH resource configuration information of the TRP that needs to be accessed;

or,

The terminal obtains the PRACH resource configuration information of the TRP that needs to be accessed from the system information of the home TRP group.
The method according to claim 1 or 2, wherein the terminal determines the home transmission and reception point TRP group, including:

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

The terminal performs downlink synchronization according to an initial synchronization signal sent by the at least one TRP group and determines the terminal. The belonging TRP group.
A method for initially accessing a network by a terminal, comprising:

The initial synchronization signal of the TRP group to which all or part of the TRPs in each of the transmitting and receiving TRP groups are transmitted and the system information of the associated TRP group, the terminal determines the belonging TRP group according to the initial synchronization signal, and acquires the Determining, by the system information of the belonging TRP group, the TRP that needs to be accessed according to the system information of the belonging TRP group, and determining the physical random access channel PRACH resource configuration information of the TRP that needs to be accessed, where the required The incoming TRP belongs to the belonging TRP group;

The TRP that needs to be accessed by the home TRP group receives a random access preamble signal that is sent by the terminal according to the PRACH resource configuration information.
The method according to claim 7, wherein the TRP of the home TRP group that needs to access the UE receives the random access preamble signal sent by the terminal according to the PRACH resource configuration information, The method also includes:

The TRP of the belonging TRP group that needs to access sends a random access response.
The method according to claim 7 or 8, wherein after all or part of the TRPs in each of the transmitting and receiving TRP groups transmit the initial synchronization signal of the associated TRP group and the system information of the associated TRP group, the method Also includes:

Each TRP in each of the TRP groups separately sends system information of the TRP, where the system information of the TRP carries PRACH resource configuration information of the TRP.
The method according to claim 7 or 8, wherein the system information of the TRP group includes PRACH resource configuration information of each TRP belonging to the TRP group.
A terminal, comprising:

a first processing module, configured to determine a home sending and receiving point TRP group, and obtain 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 a physical random access channel (PRACH) resource configuration information of the TRP that needs to be accessed, where the required access is required. The TRP belongs to the belonging TRP group;

And a third processing module, configured to initially access the TRP that needs to be accessed according to the PRACH resource configuration information.
The terminal according to claim 11, wherein the third processing module is specifically configured to:

Determining a PRACH resource according to the PRACH resource configuration information, and transmitting a PRACH on the PRACH resource;

Receiving a random access response on the TRP that needs to be accessed.
The terminal according to claim 11 or 12, wherein the second processing module is specifically configured to:

Receiving, according to the configuration information of the dedicated synchronization signal of the TRP carried in the system information of the belonging TRP group, respectively, receiving a dedicated synchronization signal of each TRP of the belonging TRP group;

Determining the TRP that needs to be accessed according to a dedicated synchronization signal of each TRP of the belonging TRP group.
The terminal according to claim 13, wherein the second processing module is specifically configured to:

Determining a maximum value of signal strength in a dedicated synchronization signal of each TRP of the belonging TRP group, and determining a TRP corresponding to the maximum value as the TRP to be accessed.
The terminal according to claim 11 or 12, wherein the second processing module is specifically configured to:

Obtaining the system information of the TRP that needs to be accessed, where the system information of the TRP that needs to be accessed carries the PRACH resource configuration information of the TRP that needs to be accessed;

or,

The PRACH resource configuration information of the TRP that needs to be accessed is obtained from the system information of the belonging TRP group.
The terminal according to claim 11 or 12, wherein the first processing module is specifically configured to:

Receiving an initial synchronization signal sent by at least one TRP group, each TRP group including at least one TRP;

Performing downlink synchronization according to the initial synchronization signal sent by the at least one TRP group and determining a TRP group to which the terminal belongs.
A transmitting and receiving point TRP, comprising:

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

The receiving module is configured to receive a random access preamble signal sent by the terminal according to the PRACH resource configuration information.
The TRP according to claim 17, wherein the receiving module is further configured to: send a random connection after receiving the random access preamble signal sent by the terminal according to the PRACH resource configuration information Incoming response.
The TRP according to claim 17 or 18, wherein the sending module is further configured to:

After transmitting the initial synchronization signal of the associated TRP group and the system information of the associated TRP group, the system information of the TRP is sent, and the system information of the TRP carries the PRACH resource configuration information of the TRP.
The TRP according to claim 17 or 18, wherein the system information of the TRP group includes PRACH resource configuration information of each TRP belonging to the TRP group.