CN107734600A - A kind of method and relevant device of terminal initial access network - Google Patents

A kind of method and relevant device of terminal initial access network Download PDF

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Publication number
CN107734600A
CN107734600A CN201610666254.6A CN201610666254A CN107734600A CN 107734600 A CN107734600 A CN 107734600A CN 201610666254 A CN201610666254 A CN 201610666254A CN 107734600 A CN107734600 A CN 107734600A
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China
Prior art keywords
trp
groups
terminal
ownership
access
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CN201610666254.6A
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Chinese (zh)
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CN107734600B (en
Inventor
王磊
郑方政
潘学明
高秋彬
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to CN201610666254.6A priority Critical patent/CN107734600B/en
Priority to PCT/CN2017/089215 priority patent/WO2018028311A1/en
Publication of CN107734600A publication Critical patent/CN107734600A/en
Application granted granted Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Abstract

The invention discloses the method and relevant device of a kind of terminal initial access network, to provide solution for accessing terminal to network in future mobile communication system.Method is：Terminal determines the transmission receiving point TRP groups of ownership, and obtains the system information of the TRP groups；The terminal needs the TRP and determination TRP for needing to access accessed Physical Random Access Channel PRACH resource allocation informations according to the determination of the system information of the TRP groups of the ownership, wherein, the TRP for needing to access belongs to the TRP groups of the ownership；The terminal is initially accessed the TRP for needing to access according to the PRACH resource allocation informations.

Description

A kind of method and relevant device of terminal initial access network
Technical field
The present invention relates to communication technical field, more particularly to the method and relevant device of a kind of terminal initial access network.
Background technology
1) next generation mobile communication technology
Mobile Internet will promote human society information interaction approach further upgrading, provide the user augmented reality, The more abundant business experiences such as virtual reality, ultra high-definition (Ultra High-Definition) video, mobile cloud.It is mobile mutual The further development of networking will bring following mobile flow to surpass thousand times of growths, promote a new round for mobile communication technology and industry to become Leather.Internet of Things extends the service range of mobile communication, extends to people and thing, thing and thing intelligent interconnection from person to person's communication, makes Mobile communication technology infiltrates into more wide industry and field.Future, portable medical, car networking, smart home, industry control System, environmental monitoring etc. will promote Internet of Things application explosive growth, and number will access network with hundred billion equipment, realize real " all things on earth interconnection ".Meanwhile the equipment connection of magnanimity and diversified internet of things service can also bring new technology to mobile communication Challenge.
With the appearance of new business demand, higher performance requirement is proposed to future mobile communication system, such as more High peak rate, more preferable Consumer's Experience speed, smaller time delay, higher reliability, higher spectrum efficiency and Geng Gao Energy consumption efficiency etc., and need to support more users to access and use miscellaneous service type.It is more harsh in order to meet Performance requirement, transmitting-receiving node is needed with higher distribution density (especially hot spot region), branch in future mobile communications network Hold more number of antennas, support higher frequency range and bigger bandwidth etc..During accessing terminal to network, it may be necessary to according to business Demand be linked into node distribution bandwidth some subband is wide or some wave beam on.
2) existing Long Term Evolution (Long Term Evolution, LTE) system random access process
Terminal is divided into Stochastic accessing based on competition and non-according to whether being assigned with private resource, by random access procedure The Stochastic accessing of competition.In random access procedure based on competition, different terminals can use identical resource；It is non-competing with In machine access procedure, the resource that different terminals Stochastic accessing uses is different.Fig. 1 show the random access procedure based on competition and shown It is intended to, Fig. 2 show non-competing random access procedure schematic diagram.
Before the Stochastic accessing based on competition, terminal completes down-going synchronous by downlink synchronous signal.Base station disappears in system The resource distribution required for Stochastic accessing is carried in breath block (System Information Block, SIB) 2.It is whole random Access procedure includes msg1-msg4.For non-competing Stochastic accessing, base station is the exclusive money of the terminal configuration each accessed Source, therefore msg1 and msg2 are only needed with regard to access procedure can be completed.Wherein msg1 is that terminal connects in the physical accidental that base station configures Enter the lead code (preamble) sent in channel (Physical Random Access Channel, PRACH) resource, msg2 To include the information such as preamble index (preamble index), timing adjustment command (timing advance command) Stochastic accessing response message.The unique mark of terminal (User Equipment, UE) is included in Msg3, competition is included in msg4 Solves mark.
In existing LTE system, terminal completes down-going synchronous, and has correctly received Master Information Block (Master Information Block, MIB), after SIB1 and SIB2, random access procedure is completed in the resource that is configured in SIB2.
In future broadband wireless communication systems, the deployment way and working method of wireless site are more diversified, such as one Or multiple wireless sites form a group (group), terminal needs to reside in group and accessed when needing and transmitting data To some website, each website can be operated in different frequency ranges, and the subband in site works frequency range is wide may to have difference Subcarrier spacing and different length OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol, some subband that terminal may be operated in site works frequency range is first-class, and terminal may need The different beams that the different sub-band or website being respectively connected in site works bandwidth are sent.
But the process of accessing terminal to network can not adapt to the need of future mobile communication system completely in current LTE system Ask.
The content of the invention
The embodiment of the present invention provides a kind of method and relevant device of terminal initial access network, to lead to for future movement Accessing terminal to network provides solution in letter system.
Concrete technical scheme provided in an embodiment of the present invention is as follows：
In a first aspect, the embodiments of the invention provide a kind of method of terminal initial access network, including：
Terminal determines the transmission receiving point TRP groups of ownership, and obtains the system information of the TRP groups；
The terminal determines to need the TRP and the determination need accessed according to the system information of the TRP groups of the ownership The Physical Random Access Channel PRACH resource allocation informations for the TRP to be accessed, wherein, the TRP for needing to access belongs to described The TRP groups of ownership；
The terminal is initially accessed the TRP for needing to access according to the PRACH resource allocation informations.
In possible embodiment, the terminal is initially accessed the needs according to the PRACH resource allocation informations and connect The TRP entered, including：
The terminal determines PRACH resources according to the PRACH resource allocation informations, is sent in the PRACH resources PRACH；
The terminal receives Stochastic accessing response on the TRP for needing to access.
In possible embodiment, the terminal determines to need what is accessed according to the system information of the TRP groups of the ownership TRP, including：
The configuration of the special synchronous signal for the TRP that the terminal carries in the system information according to the TRP groups of the ownership Information, each TRP of the TRP groups of ownership special synchronous signal is received respectively；
The terminal determines what the needs accessed according to each TRP of the TRP groups of ownership special synchronous signal TRP。
In possible embodiment, the terminal according to each TRP of the TRP groups of ownership special synchronous signal, The TRP for needing to access is determined, including：
The terminal determines the maximum of signal intensity in each TRP of the TRP groups of ownership special synchronous signal, TRP corresponding to the maximum is defined as the TRP for needing to access.
In possible embodiment, the terminal determines that the needs connect according to the system information of the TRP groups of the ownership The TRP entered Physical Random Access Channel PRACH resource allocation informations, including：
The terminal obtains the system information of the TRP for needing to access, in the system information of the TRP for needing to access Carry the PRACH resource allocation informations of the TRP for needing to access；
Or
The terminal obtains the PRACH moneys of the TRP for needing to access from the system information of the TRP groups of the ownership Source configuration information.
In possible embodiment, terminal determines the transmission receiving point TRP groups of ownership, including：
The terminal receives the initial sync signal that at least one TRP groups are sent, and each TRP groups include at least one TRP；
The terminal is according to the initial sync signal that at least one TRP groups are sent carries out down-going synchronous and determination The TRP groups of terminal attaching.
Second aspect, the embodiments of the invention provide a kind of method of terminal initial access network, including：
Each all or part of TRP sent in receiving point TRP groups send belonging to TRP groups initial sync signal and The system information of affiliated TRP groups, as the terminal according to the initial sync signal determines TRP groups and the acquisition of ownership The system information of the TRP groups of ownership, determined to need TRP and the determination accessed according to the system information of the TRP groups of the ownership The Physical Random Access Channel PRACH resource allocation informations of the TRP for needing to access, wherein, the TRP category for needing to access In the TRP groups of the ownership；
The TRP of the needs access of the TRP groups of the ownership receives the terminal to be believed according to the PRACH resource distributions Cease the random access lead code signal sent.
In possible embodiment, the TRP of the needs access of the TRP groups of the ownership receives the terminal according to institute After the random access lead code signal for stating the transmission of PRACH resource allocation informations, methods described also includes：
The TRP of the needs access of the TRP groups of the ownership sends Stochastic accessing response.
In possible embodiment, each all or part of TRP sent in receiving point TRP groups sends affiliated TRP groups Initial sync signal and affiliated TRP groups system information after, methods described also includes：
Each TRP in each TRP groups sends the system information of the TRP respectively, in the system information of the TRP Carry the PRACH resource allocation informations of the TRP.
Include each TRP's for belonging to the TRP groups in possible embodiment, in the system information of the TRP groups PRACH resource allocation informations.
The third aspect, the embodiments of the invention provide a kind of terminal, including：
First processing module, for determining the transmission receiving point TRP groups of ownership, and obtain the system information of the TRP groups；
Second processing module, the system information for the TRP groups according to the ownership determine to need the TRP that accesses and really The fixed TRP for needing to access Physical Random Access Channel PRACH resource allocation informations, wherein, the TRP for needing to access Belong to the TRP groups of the ownership；
3rd processing module, for being initially accessed the TRP for needing to access according to the PRACH resource allocation informations.
In possible embodiment, the 3rd processing module is specifically used for：
PRACH resources are determined according to the PRACH resource allocation informations, PRACH is sent in the PRACH resources；
Stochastic accessing response is received on the TRP for needing to access.
In possible embodiment, the Second processing module is specifically used for：
According to the configuration information of the TRP carried in the system information of the TRP groups of the ownership special synchronous signal, difference Receive each TRP of the TRP groups of ownership special synchronous signal；
According to each TRP of the TRP groups of ownership special synchronous signal, the TRP for needing to access is determined.
In possible embodiment, the Second processing module is specifically used for：
The maximum of signal intensity in each TRP of the TRP groups of ownership special synchronous signal is determined, by described in most TRP corresponding to big value is defined as the TRP for needing to access.
In possible embodiment, the Second processing module is specifically used for：
Obtain the TRP system information for needing to access, carried in the system information of the TRP for needing to access described in Need the TRP PRACH resource allocation informations accessed；
Or
From the system information of the TRP groups of the ownership, the PRACH resource distributions letter of the TRP for needing to access is obtained Breath.
In possible embodiment, the first processing module is specifically used for：
The initial sync signal that at least one TRP groups are sent is received, each TRP groups include at least one TRP；
The initial sync signal sent according at least one TRP groups carries out down-going synchronous and determines the terminal attaching TRP groups.
Fourth aspect, the embodiments of the invention provide one kind to send receiving point TRP, including：
Sending module, for sending the affiliated initial sync signal of TRP groups and the system information of affiliated TRP groups, The TRP groups of ownership are determined according to the initial sync signal by the terminal and obtain the system information of the TRP groups of the ownership, Determined to need the TRP and determination TRP for needing to access accessed physics according to the system information of the TRP groups of the ownership RACH PRACH resource allocation informations, wherein, the TRP for needing to access belongs to the TRP groups of the ownership；And/or
Receiving module, the random access lead code sent for receiving terminal according to the PRACH resource allocation informations are believed Number.
In possible embodiment, the receiving module is receiving the terminal according to the PRACH resource allocation informations After the random access lead code signal of transmission, the sending module is additionally operable to：Send Stochastic accessing response.
In possible embodiment, the sending module is additionally operable to：
After the initial sync signal of TRP groups belonging to sending and the system information of affiliated TRP groups, described in transmission TRP system information, the PRACH resource allocation informations of the TRP are carried in the system information of the TRP.
Include each TRP's for belonging to the TRP groups in possible embodiment, in the system information of the TRP groups PRACH resource allocation informations.
5th aspect, the embodiments of the invention provide a kind of terminal, the terminal includes processor, memory and transceiver, Wherein, transceiver receives and sent under the control of a processor data, and default program is preserved in memory, and processor is read Program in memory, procedure below is performed according to the program：
It is determined that the transmission receiving point TRP groups of ownership, and obtain the system information of the TRP groups；
What the TRP and the determination needs accessed according to the system information of the TRP groups of ownership determination needs was accessed TRP Physical Random Access Channel PRACH resource allocation informations, wherein, the TRP for needing to access belongs to the ownership TRP groups；
The TRP for needing to access is initially accessed by transceiver according to the PRACH resource allocation informations.
In possible embodiment, processor determines PRACH resources according to the PRACH resource allocation informations, described PRACH is sent in PRACH resources；
Transceiver Stochastic accessing response is indicated on the TRP for needing to access.
In possible embodiment, TRP's that processor carries in the system information according to the TRP groups of the ownership is special The configuration information of synchronizing signal, receive each TRP of the TRP groups of ownership special synchronous signal respectively by transceiver；
According to each TRP of the TRP groups of ownership special synchronous signal, the TRP for needing to access is determined.
In possible embodiment, processor determines to believe in each TRP of the TRP groups of ownership special synchronous signal The maximum of number intensity, TRP corresponding to the maximum is defined as the TRP for needing to access.
In possible embodiment, processor obtains the system information of the TRP for needing to access, described to need what is accessed The PRACH resource allocation informations of the TRP for needing to access are carried in TRP system information；
Or
From the system information of the TRP groups of the ownership, the PRACH resource distributions letter of the TRP for needing to access is obtained Breath.
In possible embodiment, initial sync signal that processor is sent by least one TRP groups of transceiver, Each TRP groups include at least one TRP；
The initial sync signal sent according at least one TRP groups carries out down-going synchronous and determines the terminal attaching TRP groups.
6th aspect, the embodiments of the invention provide one kind to send receiving point TRP, including processor, memory and transmitting-receiving Machine, wherein transceiver receive and sent under the control of a processor data, and default program is preserved in memory, and processor is read Program in access to memory, procedure below is performed according to the program：
The affiliated initial sync signal of TRP groups and the system information of affiliated TRP groups are sent by transceiver, by institute Terminal is stated to determine the TRP groups of ownership according to the initial sync signal and obtain the system information of the TRP groups of the ownership, according to The system information of the TRP groups of the ownership determines to need the TRP and determination TRP for needing to access accessed physical accidental Channel PRACH resource allocation informations are accessed, wherein, the TRP for needing to access belongs to the TRP groups of the ownership；And/or
The random access lead code signal sent by transceiver terminal according to the PRACH resource allocation informations.
In possible embodiment, processor is believed by terminal described in transceiver according to the PRACH resource distributions After ceasing the random access lead code signal sent, Stochastic accessing response is sent by transceiver.
In possible embodiment, processor by transceiver send belonging to TRP groups initial sync signal and After the system information of affiliated TRP groups, the system information of the TRP is sent by transceiver, in the system information of the TRP Carry the PRACH resource allocation informations of the TRP.
Include each TRP's for belonging to the TRP groups in possible embodiment, in the system information of the TRP groups PRACH resource allocation informations.
Based on above-mentioned technical proposal, in the embodiment of the present invention, terminal determine the TRP groups of ownership and obtain the TRP groups be After information of uniting, the PRACH for the TRP for determining to need the TRP that accesses and determine needs access according to the system information of the TRP groups Resource allocation information, the TRP for needing to access is initially accessed according to the PRACH resource allocation informations, so as to be following movement Terminal in communication system access network provides solution.
Brief description of the drawings
Fig. 1 is the random access procedure schematic diagram based on competition；
Fig. 2 is non-competing random access procedure schematic diagram；
Fig. 3 is the method flow schematic diagram that terminal initial accesses network in the embodiment of the present invention；
Fig. 4 is the method flow schematic diagram that another terminal initial accesses network in the embodiment of the present invention；
Fig. 5 is the schematic diagram of a scenario that terminal initial accesses TRP in the first and second specific embodiments of the invention；
Fig. 6 is the schematic diagram of a scenario that terminal initial accesses TRP in the 3rd specific embodiment of the invention；
Fig. 7 is the schematic diagram of a scenario that terminal initial accesses TRP in the 4th specific embodiment of the invention；
Fig. 8 is the schematic diagram of a scenario that terminal initial accesses TRP in the 5th specific embodiment of the invention；
Fig. 9 is terminal structure schematic diagram in the embodiment of the present invention；
Figure 10 is TRP structural representations in the embodiment of the present invention；
Figure 11 is another terminal structure schematic diagram in the embodiment of the present invention；
Figure 12 is another TRP structural representations in the embodiment of the present invention.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, the present invention is made below in conjunction with accompanying drawing into One step it is described in detail, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole implementation Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made All other embodiment, belongs to the scope of protection of the invention.
In the embodiment of the present invention, as shown in figure 3, the method detailed flow of terminal initial access network is as follows：
Step 301：Terminal determine ownership transmission receiving point (Transmission and Reception Point, TRP) group, and obtain the system information of the TRP groups.
In implementation, terminal determines that the detailed process of the TRP groups of ownership is：Terminal receives the first of at least one TRP groups transmission Beginning synchronizing signal, each TRP groups include at least one TRP；The initial sync signal that terminal is sent according at least one TRP groups Carry out down-going synchronous and determine the TRP groups of the terminal attaching.
Specifically, terminal detects the initial sync signal of at least one TRP groups, selects signal at least one TRP groups TRP group of the most strong TRP groups of intensity as the terminal attaching.Herein only exemplified by the TRP groups of ownership are selected according to signal intensity, In practical application, terminal can also be arranged and pass through the other performance index of the initial sync signal of TRP groups as according to determination ownership TRP groups, protection scope of the present invention is not limited thereto system.
In, the initial sync signal of TRP groups can be single-stage, twin-stage or multilevel signal.For example, TRP's is initial same Step signal includes synchronizing signal 1 (being expressed as sync1) and synchronizing signal 2 (being expressed as sync2).
In implementation, the initial sync signal of TRP groups can serve to indicate that TRP groups identify.
In implementation, TRP groups have any one or more following characteristic：
Include at least one TRP；
Identified with unique TRP groups；
With the system information for organizing special (group-specific) synchronizing signal and group, for example, group special synchronous letter Number it is sync1 and sync2, the system information of group is MIB and/or SIB-X；
The terminal of idle (IDLE) state is allowed to reside in TRP groups.
In implementation, TPR has any one or more following characteristic：
TRP can be the wave beam (beam) or subband of a transmission receiving node；
Each TRP has unique mark；
Each TRP has specific physical layer configurations, such as subcarrier spacing, bandwidth, PRACH resources etc.；
Each TRP has special (TRP-specific) synchronizing signal and TRP system information, such as TRP special synchronous Signal is expressed as sync3, and TRP system information is expressed as SIB-Y；
The terminal of Idle state need not identify TRP before Stochastic accessing.
In implementation, terminal determines that descending sequential and TRP groups identify according to the initial sync signal of the TRP groups received, Receive the system information of the TRP groups, such as MIB and SIB-X.
In implementation, the system informations of TRP groups has any one or more in following characteristic：
The system information of TRP groups is system information area (SIA, the System information for the TRP groups Area all effective configuration informations of all TRP in)；
The system information of TRP groups includes the necessary information for the special synchronous signal for being used for terminal detection TRP；
Each TRP PRACH resource allocation informations can be included in the system information of TRP groups.
Step 302：The TRP and determine the needs that terminal accesses according to the system information of the TRP groups of ownership determination needs The TRP of access PRACH resource allocation informations, wherein it is desired to which the TRP of access belongs to the TRP groups of the ownership.
In one embodiment, terminal determines to need the TRP accessed, tool according to the system information of the TRP groups of ownership Body is：The configuration information of the special synchronous signal for the TRP that terminal carries in the system information according to the TRP groups of ownership, connects respectively Receive each TRP of the TRP groups of ownership special synchronous signal；The terminal is special according to each TRP's of the TRP groups of the ownership Synchronizing signal, determine the TRP of needs access.
In another embodiment, terminal selects a TRP to be used as according to preset rules from the TRP groups of ownership to be needed The TRP to be accessed, for example, terminal randomly chooses the TRP that a TRP accesses as needs from the TRP groups of ownership.
Alternatively, terminal determine ownership TRP groups each TRP special synchronous signal in signal intensity maximum, TRP corresponding to the maximum is defined as to need the TRP accessed.TRP only to need to access according to signal intensity selection herein Exemplified by, in practical application, it is to be connect according to selection needs that can also arrange the other performance index that terminal passes through special synchronous signal The TRP entered, protection scope of the present invention are not limited thereto system.
Specifically, terminal receives the special synchronous signal designation of the TRP according to the TRP received special synchronous signal TRP system information, be expressed as SIB-Y.Wherein, the PRACH resource allocation informations of the TRP can be included in SIB-Y.
In implementation, the PRACH resource distributions for the TRP that terminal needs to access according to the determination of the system information of the TRP groups of ownership Information, including but not limited to following two implementations：
First, terminal obtains the system information for the TRP for needing to access, and is carried in the TRP of needs access system information The TRP of needs access PRACH resource allocation informations.
Second, terminal obtains the PRACH resource distributions letter for the TRP for needing to access from the system information of the TRP groups of ownership Breath.
Step 303：Terminal is initially accessed the TRP of needs access according to PRACH resource allocation informations.
In implementation, terminal is initially accessed the TRP of needs access according to PRACH resource allocation informations, is specially：Terminal root PRACH resources are determined according to PRACH resource allocation informations, PRACH is sent to the TRP that needs access in the PRACH resources；The end The Stochastic accessing response for holding the TRP for receiving needs access on the TRP of needs access to return.
Specifically, send random access lead code in the PRACH resources for the TRP that terminal accesses in the needs, TRP with from Random access lead code is detected in oneself related PRACH resources, and according to the lead code received in bandwidth of operation or subband Or beam side sends up Stochastic accessing response.
Based on same inventive concept, in the embodiment of the present invention, as shown in figure 4, the method detailed of terminal initial access network Flow is as follows：
Step 401：All or part of TRP in each TRP groups sends initial sync signal and the institute of affiliated TRP groups The system information of the TRP groups of category, as the terminal according to the initial sync signal determine ownership TRP groups and obtain described in return The system information of the TRP groups of category, determined to need TRP and the determination institute accessed according to the system information of the TRP groups of the ownership The Physical Random Access Channel PRACH resource allocation informations for the TRP for needing to access are stated, wherein, the TRP for needing to access belongs to The TRP groups of the ownership.
In one embodiment, all or part of TRP in each TRP groups sends the initial same of affiliated TRP groups After the system information for walking signal and affiliated TRP groups, the broadcast transmission TRP is respectively by each TRP in each TRP groups Unite information, the PRACH resource allocation informations of the TRP are carried in the system information of the TRP.
In another embodiment, the PRACH for each TRP for belonging to the TRP groups is included in the system information of TRP groups Resource allocation information.
Step 402：The TRP of the needs access of the TRP groups of ownership receives the terminal and matched somebody with somebody according to the PRACH resources The random access lead code signal that confidence breath is sent.
In implementation, the TRP of the needs access of the TRP groups of the ownership receives the terminal and provided according to the PRACH After the random access lead code signal that source configuration information is sent, the TRP of the needs access of the TRP groups of the ownership is sent Stochastic accessing response sends Stochastic accessing response.
The process for accessing network to terminal initial in future mobile communication system below by way of several specific embodiments is carried out Describe in detail.
First specific embodiment
In the specific embodiment, define a TRP group and only include a TRP, then each TRP is required to send down-going synchronous Signal sync1 and sync2, current TRP groups mark and descending timing are determined for terminal.Terminal detects in specific resources Sync1 and sync2, and according to each sync1 and sync2 received signal intensity, the most strong sync1 of selection signal intensity With sync2 as the downlink synchronous signal for being resident TRP groups, and determine that TRP groups identify according to the sync1 and sync2 that receive.Often TRP in individual TRP groups is required to the system information (System Information) of broadcast transmission this TRP groups.
It is illustrated in figure 5 terminal initial access TRP schematic diagram of a scenario.Such as TRP1 is needed in system information area System information is sent in (System Information Area, SIA) 1, TRP2 needs to send system information etc. in SIA2. Downlink synchronous signal sync3 relevant information is included in system information, wherein downlink synchronous signal sync3 is the special same of TRP Walk signal.
Illustrate the random access procedure of the scene by taking TRP groups 1 as an example, the TRP groups 1 is in SIA1 regions shown in Fig. 5 TRP.Terminal obtains the necessary information for being used to detect sync3 included in system information, is detected and received according to the necessary information sync3.Terminal is according to sync3 signal strength, it is determined that needing the TRP wave beam or certain height of TRP bandwidth of operation accessed Band.
TRP wave beam or some subband of TRP bandwidth of operation, which have in independent system information SIB-Y, SIB-Y, to be included The beam or the subband PRACH resource allocation informations.PRACH resource distribution letter of the terminal in the SIB-Y received Breath, PRACH is sent in the PRACH resources.
TRP is detected on the wave beam or the specific PRACH resources of subband receives lead code.Before TRP is according to receiving Leading code, Stochastic accessing response either is sent on subband or bandwidth of operation in wave beam corresponding to the PRACH resources, informs where is terminal Individual lead code is properly received.
Terminal needs the bandwidth of operation in TRP either to receive Stochastic accessing response message on subband or wave beam.
Second specific embodiment
In the specific embodiment, a TRP group only includes a TRP.Each TRP is required to send downlink synchronous signal Sync1 and sync2, TRP groups mark and descending timing are determined for terminal.
Terminal detects sync1 and sync2 in specific resources, and strong according to the sync1 and sync2 received, selection signal Downlink synchronous signals of the degree most strong sync1 and sync2 as resident TRP groups, and it is true according to the sync1 and sync2 received Determine TRP groups mark.
As shown in figure 5, the TRP in each TRP groups is required to send the system information of the TRP groups, such as TRP1 needs System information is sent in SIA1 regions, TRP2 needs to send system information in SIA2 regions.It is false by taking the terminal in SIA1 as an example If TRP1 need not send downlink synchronous signal sync3, then need to carry PRACH resource allocation informations in SIB-X.Terminal exists After detecting sync1 and sync2, it is determined that need the TRP marks accessed, and according to sync1 and the sync2 sequential relationship determined and TRP marks receive the system information MIB and SIB-X of the TRP.
Terminal is sent according to the PRACH resources configured in the system information SIB-X received in the PRACH resources PRACH.TRP is detected in the PRACH resources that system information SIB-X is configured receives lead code.If receive some or it is some The lead code that terminal is sent, then carry the preamble information received in Stochastic accessing response.Terminal needs the work in TRP Bandwidth either receives Stochastic accessing response on subband or wave beam.
3rd specific embodiment
In the specific embodiment, it is assumed that multiple TRP are included in a TRP group, and all TRP in TRP groups are synchronous 's.Then each TRP groups are required to send downlink synchronous signal sync1 and sync2, and current TRP groups mark is determined for terminal With descending timing.Sync1, sync2 and system information of TRP groups can be sent by one or several TRP in TRP groups. Terminal is and most strong according to the sync1 and sync2 received, selection signal intensity in specific resources measurement sync1 and sync2 Downlink synchronous signal as resident TRP groups of sync1 and sync2, and TRP groups are determined according to the sync1 and sync2 received Mark.
As shown in fig. 6, network sends the system information MIB and SIB-X of TRP groups in SIA.Terminal is according to receiving Configuration information in SIB-X on sync3, detected in specific position and receive sync3.Terminal according to the powers of sync3 signals, It is determined that need the TRP accessed.
For example, terminal determines to need to access TRP1, then TRP1 system information SIB-Y is continued to.Included in SIB-Y TRP1 PRACH resource allocation informations.The PRACH resource allocation informations, can be the PRACH resource distributions letter of each wave beam The PRACH resource allocation informations of some subband in breath or TRP1 bandwidth of operation.Terminal is according to PRACH in SIB-Y Resource allocation information sends lead code.TRP1 is detected in the PRACH resources oneself configured receives lead code.When TRP1 detections connect The lead code of 1 or the transmission of multiple terminals are received, then the lead code relevant information received is carried in Stochastic accessing response. Bandwidth of operation of the terminal in TRP1 either detects reception Stochastic accessing response on subband or wave beam.
Further, each TRP PRACH resource allocation informations can also be sent in SIB-X.
4th specific embodiment
In the specific embodiment, it is assumed that multiple TRP are included in a TRP group, and the TRP in TRP groups is not all same Step.Sync1, sync2 and system information of TRP groups can be sent by one or several TRP in TRP groups.
Terminal detects sync1 and sync2 in specific resources, and strong according to the sync1 and sync2 received, selection signal Downlink synchronous signals of the degree most strong sync1 and sync2 as resident TRP groups, and it is true according to the sync1 and sync2 received Determine TRP groups mark.
As shown in fig. 7, network sends the system information MIB and SIB-X of TRP groups in SIA.
Terminal detects in specific position according to the configuration information in the SIB-X received on sync3 and receives sync3. Terminal is according to the powers of sync3 signals, it is determined that needing the TRP accessed.
Assuming that terminal determines to need to access TRP1, then terminal continues to TRP1 system information SIB-Y.Wrapped in SIB-Y PRACH resource allocation informations containing TRP1.The PRACH resource allocation informations, can be the PRACH resource distributions letter of each wave beam The PRACH resource allocation informations of some subband in breath or TRP1 bandwidth of operation.Terminal is according to PRACH in SIB-Y Resource allocation information sends lead code.TRP1 is detected in the PRACH resources of configuration receives lead code.
When TRP1 detections receive the lead code that 1 or multiple terminals send, then carry and connect in Stochastic accessing response The lead code relevant information received.Terminal TRP1 bandwidth of operation either on subband or wave beam detection receive Stochastic accessing should Answer information.
Further, each TRP PRACH resource allocation informations can also be sent in SIB-X.
5th specific embodiment
In the specific embodiment, it is assumed that include multiple TRP in a TRP group, part TRP is operated in low-frequency range, part TRP It is operated in high band.One or several TRP for being operated in low-frequency range send sync1, sync2 and system information of TRP groups.
Terminal can complete the selection of TRP groups by receiving sync1 and sync2 and be resident, and receive the system letter of TRP groups Cease MIB and SIB-X.
Terminal receives sync3 according to the configuration in SIB-X on sync3, and wherein sync3 is sent in high band, and is selected The most strong TRP of sync3 signal intensities is as access TRP.
As shown in Figure 8, it is assumed that terminal determines to need to access TRP1, then terminal continues to receive TRP1 system letter in high band Cease SIB-Y.TRP1 PRACH resource allocation informations are included in SIB-Y.The PRACH resource allocation informations, can be each wave beam PRACH resource allocation informations or TRP1 bandwidth of operation in some subband PRACH resource allocation informations.Eventually End sends lead code according to PRACH resource allocation informations in SIB-Y.It is leading that TRP1 detects reception in the PRACH resources of configuration Code.When TRP1 detections receive the lead code that 1 or multiple terminals send, then carry what is received in Stochastic accessing response Lead code relevant information.Bandwidth of operation of the terminal in TRP1 either detects reception Stochastic accessing response letter on subband or wave beam Breath.
Further, each TRP PRACH resource allocation informations can also be sent in SIB-X.
In above all of specific embodiment, the initial sync signals of TRP groups can be single-stage, twin-stage or multistage, A kind of implementation for downlink synchronous signal that sync1 and sync2 is only possible to.Equally, TRP special synchronous signal can be Single-stage, twin-stage or multistage, the embodiment of the present invention is not limited.
In addition, the system information MIB and SIB-X of TRP groups, and TRP system information SIB-Y, merely to description It is convenient, it is not excluded that using the possibility of other titles description.
Based on same inventive concept, a kind of terminal is provided in the embodiment of the present invention, the specific implementation of the terminal can be found in The description of embodiment of the method part, repeat part and repeat no more, as shown in figure 9, the terminal mainly includes：
First processing module 901, for determining the transmission receiving point TRP groups of ownership, and obtain the system letter of the TRP groups Breath；
Second processing module 902, the system information for the TRP groups according to the ownership determine to need the TRP that accesses with And the Physical Random Access Channel PRACH resource allocation informations of the TRP for needing to access are determined, wherein, it is described to need to access TRP belong to the TRP groups of the ownership；
3rd processing module 903, for being initially accessed what the needs accessed according to the PRACH resource allocation informations TRP。
In possible embodiment, the 3rd processing module is specifically used for：
PRACH resources are determined according to the PRACH resource allocation informations, PRACH is sent in the PRACH resources；
Stochastic accessing response is received on the TRP for needing to access.
In possible embodiment, the Second processing module is specifically used for：
According to the configuration information of the TRP carried in the system information of the TRP groups of the ownership special synchronous signal, difference Receive each TRP of the TRP groups of ownership special synchronous signal；
According to each TRP of the TRP groups of ownership special synchronous signal, the TRP for needing to access is determined.
In possible embodiment, the Second processing module is specifically used for：
The maximum of signal intensity in each TRP of the TRP groups of ownership special synchronous signal is determined, by described in most TRP corresponding to big value is defined as the TRP for needing to access.
In possible embodiment, the Second processing module is specifically used for：
Obtain the TRP system information for needing to access, carried in the system information of the TRP for needing to access described in Need the TRP PRACH resource allocation informations accessed；
Or
From the system information of the TRP groups of the ownership, the PRACH resource distributions letter of the TRP for needing to access is obtained Breath.
In possible embodiment, the first processing module is specifically used for：
The initial sync signal that at least one TRP groups are sent is received, each TRP groups include at least one TRP；
The initial sync signal sent according at least one TRP groups carries out down-going synchronous and determines the terminal attaching TRP groups.
Based on same inventive concept, the embodiments of the invention provide a kind of TRP, the specific implementation of the TRP can be found in method The description of embodiment part, repeat part and repeat no more, as shown in Figure 10, the TRP mainly includes：
Sending module 1001, for sending the initial sync signal of affiliated TRP groups and the system letter of affiliated TRP groups Breath, the system for determining the TRP groups of ownership according to the initial sync signal by the terminal and obtaining the TRP groups of the ownership are believed Breath, the TRP accessed according to the system information of the TRP groups of ownership determination needs and the determination TRP's for needing to access Physical Random Access Channel PRACH resource allocation informations, wherein, the TRP for needing to access belongs to the TRP groups of the ownership； And/or
Receiving module 1002, the random access guiding sent for receiving terminal according to the PRACH resource allocation informations Code signal.
In possible embodiment, the receiving module is receiving the terminal according to the PRACH resource allocation informations After the random access lead code signal of transmission, the sending module is additionally operable to：Send Stochastic accessing response.
In possible embodiment, the sending module is additionally operable to：
After the initial sync signal of TRP groups belonging to sending and the system information of affiliated TRP groups, described in transmission TRP system information, the PRACH resource allocation informations of the TRP are carried in the system information of the TRP.
Include each TRP's for belonging to the TRP groups in possible embodiment, in the system information of the TRP groups PRACH resource allocation informations.
Based on same inventive concept, the embodiments of the invention provide another terminal, the specific implementation of the terminal can be found in The description of embodiment of the method part, repeat part and repeat no more, as shown in figure 11, the terminal mainly includes processor 1101, deposited Reservoir 1102 and transceiver 1103, wherein, transceiver 1103 receives and sent data, memory under the control of processor 1101 Default program is preserved in 1102, processor 1101 reads the program in memory 1102, and following mistake is performed according to the program Journey：
It is determined that the transmission receiving point TRP groups of ownership, and obtain the system information of the TRP groups；
What the TRP and the determination needs accessed according to the system information of the TRP groups of ownership determination needs was accessed TRP Physical Random Access Channel PRACH resource allocation informations, wherein, the TRP for needing to access belongs to the ownership TRP groups；
The TRP for needing to access is initially accessed by transceiver according to the PRACH resource allocation informations.
In possible embodiment, processor 1101 determines PRACH resources according to the PRACH resource allocation informations, PRACH is sent in the PRACH resources；
Transceiver Stochastic accessing response is indicated on the TRP for needing to access.
In possible embodiment, TRP's that processor 1101 carries in the system information according to the TRP groups of the ownership The configuration information of special synchronous signal, receive each TRP of the TRP groups of ownership special synchronous letter respectively by transceiver Number；
According to each TRP of the TRP groups of ownership special synchronous signal, the TRP for needing to access is determined.
In possible embodiment, processor 1101 determines each TRP of the TRP groups of ownership special synchronous signal The maximum of middle signal intensity, TRP corresponding to the maximum is defined as the TRP for needing to access.
In possible embodiment, processor 1101 obtains the system information of the TRP for needing to access, and the needs connect The PRACH resource allocation informations of the TRP for needing to access are carried in the TRP entered system information；
Or
From the system information of the TRP groups of the ownership, the PRACH resource distributions letter of the TRP for needing to access is obtained Breath.
In possible embodiment, processor 1101 receives the initial of at least one TRP groups transmission by transceiver 1103 Synchronizing signal, each TRP groups include at least one TRP；
The initial sync signal sent according at least one TRP groups carries out down-going synchronous and determines the terminal attaching TRP groups.
Based on same inventive concept, the embodiment of the present invention additionally provides another TRP, and the specific implementation of the TRP can be found in The description of embodiment of the method part, repeat part and repeat no more, as shown in figure 12, the TRP mainly includes processor 1201, storage Device 1202 and transceiver 1203, wherein transceiver 1203 receive and sent data, memory under the control of processor 1201 Default program is preserved in 1202, processor 1201 reads the program in memory 1202, and following mistake is performed according to the program Journey：
The affiliated initial sync signal of TRP groups and the system information of affiliated TRP groups are sent by transceiver 1203, The TRP groups of ownership are determined according to the initial sync signal by the terminal and obtain the system information of the TRP groups of the ownership, Determined to need the TRP and determination TRP for needing to access accessed physics according to the system information of the TRP groups of the ownership RACH PRACH resource allocation informations, wherein, the TRP for needing to access belongs to the TRP groups of the ownership；And/or
The random access lead code sent by the receiving terminal of transceiver 1203 according to the PRACH resource allocation informations is believed Number.
In possible embodiment, processor 1201 receives the terminal by transceiver 1203 and provided according to the PRACH After the random access lead code signal that source configuration information is sent, Stochastic accessing response is sent by transceiver.
In possible embodiment, processor 1201 is sending the initial synchronisation of affiliated TRP groups by transceiver 1203 After the system information of signal and affiliated TRP groups, the system information of the TRP, the TRP are sent by transceiver 1203 System information in carry the PRACH resource allocation informations of the TRP.
Include each TRP's for belonging to the TRP groups in possible embodiment, in the system information of the TRP groups PRACH resource allocation informations.
Based on above-mentioned technical proposal, in the embodiment of the present invention, terminal determine the TRP groups of ownership and obtain the TRP groups be After information of uniting, the PRACH for the TRP for determining to need the TRP that accesses and determine needs access according to the system information of the TRP groups Resource allocation information, the TRP for needing to access is initially accessed according to the PRACH resource allocation informations, so as to be following movement Terminal in communication system access network provides solution.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more The shape for the computer program product that usable storage medium is implemented on (including but is not limited to magnetic disk storage and optical memory etc.) Formula.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (20)

  1. A kind of 1. method of terminal initial access network, it is characterised in that including：
    Terminal determines the transmission receiving point TRP groups of ownership, and obtains the system information of the TRP groups；
    The TRP and determine that the needs connect that the terminal accesses according to the system information of the TRP groups of ownership determination needs The TRP entered Physical Random Access Channel PRACH resource allocation informations, wherein, the TRP for needing to access belongs to the ownership TRP groups；
    The terminal is initially accessed the TRP for needing to access according to the PRACH resource allocation informations.
  2. 2. the method as described in claim 1, it is characterised in that the terminal is initial according to the PRACH resource allocation informations The TRP for needing to access is accessed, including：
    The terminal determines PRACH resources according to the PRACH resource allocation informations, is sent in the PRACH resources PRACH；
    The terminal receives Stochastic accessing response on the TRP for needing to access.
  3. 3. method as claimed in claim 1 or 2, it is characterised in that the terminal is believed according to the system of the TRP groups of the ownership Breath determines the TRP that needs access, including：
    The configuration information of the special synchronous signal for the TRP that the terminal carries in the system information according to the TRP groups of the ownership, Each TRP of the TRP groups of ownership special synchronous signal is received respectively；
    The terminal determines the TRP for needing to access according to each TRP of the TRP groups of ownership special synchronous signal.
  4. 4. method as claimed in claim 3, it is characterised in that the terminal is according to each TRP's of the TRP groups of the ownership Special synchronous signal, the TRP for needing to access is determined, including：
    The terminal determines the maximum of signal intensity in each TRP of the TRP groups of ownership special synchronous signal, by institute State TRP corresponding to maximum and be defined as the TRP for needing to access.
  5. 5. method as claimed in claim 1 or 2, it is characterised in that the terminal is believed according to the system of the TRP groups of the ownership Breath determines the Physical Random Access Channel PRACH resource allocation informations of the TRP for needing to access, including：
    The terminal obtains the system information of the TRP for needing to access, is carried in the system information of the TRP for needing to access The PRACH resource allocation informations of the TRP for needing to access；
    Or
    The terminal from the system information of the TRP groups of the ownership, match somebody with somebody by the PRACH resources for obtaining the TRP for needing to access Confidence ceases.
  6. 6. method as claimed in claim 1 or 2, it is characterised in that terminal determines the transmission receiving point TRP groups of ownership, including：
    The terminal receives the initial sync signal that at least one TRP groups are sent, and each TRP groups include at least one TRP；
    The initial sync signal that the terminal is sent according at least one TRP groups carries out down-going synchronous and determines the terminal The TRP groups of ownership.
  7. A kind of 7. method of terminal initial access network, it is characterised in that including：
    Each all or part of TRP sent in receiving point TRP groups send belonging to the initial sync signal of TRP groups and affiliated TRP groups system information, by the terminal according to the initial sync signal determine ownership TRP groups and obtain the ownership TRP groups system information, according to the system information of the TRP groups of the ownership determines to need the TRP that accesses and determination The TRP Physical Random Access Channel PRACH resource allocation informations accessed are needed, wherein, the TRP for needing to access belongs to institute State the TRP groups of ownership；
    The TRP of the needs access of the TRP groups of the ownership receives the terminal and sent out according to the PRACH resource allocation informations The random access lead code signal sent.
  8. 8. method as claimed in claim 7, it is characterised in that the TRP of the needs access of the TRP groups of the ownership is received After the random access lead code signal that the terminal is sent according to the PRACH resource allocation informations, methods described also includes：
    The TRP of the needs access of the TRP groups of the ownership sends Stochastic accessing response.
  9. 9. method as claimed in claim 7 or 8, it is characterised in that each all or part sent in receiving point TRP groups After TRP sends the affiliated initial sync signal of TRP groups and the system information of affiliated TRP groups, methods described also includes：
    Each TRP in each TRP groups sends the system information of the TRP respectively, is carried in the system information of the TRP The PRACH resource allocation informations of the TRP.
  10. 10. method as claimed in claim 7 or 8, it is characterised in that included in the system information of the TRP groups and belong to described Each TRP of TRP groups PRACH resource allocation informations.
  11. A kind of 11. terminal, it is characterised in that including：
    First processing module, for determining the transmission receiving point TRP groups of ownership, and obtain the system information of the TRP groups；
    Second processing module, the system information for the TRP groups according to the ownership determine to need TRP and the determination institute accessed The Physical Random Access Channel PRACH resource allocation informations for the TRP for needing to access are stated, wherein, the TRP for needing to access belongs to The TRP groups of the ownership；
    3rd processing module, for being initially accessed the TRP for needing to access according to the PRACH resource allocation informations.
  12. 12. terminal as claimed in claim 11, it is characterised in that the 3rd processing module is specifically used for：
    PRACH resources are determined according to the PRACH resource allocation informations, PRACH is sent in the PRACH resources；
    Stochastic accessing response is received on the TRP for needing to access.
  13. 13. the terminal as described in claim 11 or 12, it is characterised in that the Second processing module is specifically used for：
    According to the configuration information of the TRP carried in the system information of the TRP groups of the ownership special synchronous signal, receive respectively Each TRP of the TRP groups of ownership special synchronous signal；
    According to each TRP of the TRP groups of ownership special synchronous signal, the TRP for needing to access is determined.
  14. 14. terminal as claimed in claim 13, it is characterised in that the Second processing module is specifically used for：
    The maximum of signal intensity in each TRP of the TRP groups of ownership special synchronous signal is determined, by the maximum Corresponding TRP is defined as the TRP for needing to access.
  15. 15. the terminal as described in claim 11 or 12, it is characterised in that the Second processing module is specifically used for：
    The system information of the TRP for needing to access is obtained, the needs are carried in the system information of the TRP for needing to access The TRP of access PRACH resource allocation informations；
    Or
    From the system information of the TRP groups of the ownership, the PRACH resource allocation informations of the TRP for needing to access are obtained.
  16. 16. the terminal as described in claim 11 or 12, it is characterised in that the first processing module is specifically used for：
    The initial sync signal that at least one TRP groups are sent is received, each TRP groups include at least one TRP；
    The initial sync signal sent according at least one TRP groups carries out down-going synchronous and determines the terminal attaching TRP groups.
  17. 17. one kind sends receiving point TRP, it is characterised in that including：
    Sending module, for sending the affiliated initial sync signal of TRP groups and the system information of affiliated TRP groups, by institute Terminal is stated to determine the TRP groups of ownership according to the initial sync signal and obtain the system information of the TRP groups of the ownership, according to The system information of the TRP groups of the ownership determines to need the TRP and determination TRP for needing to access accessed physical accidental Channel PRACH resource allocation informations are accessed, wherein, the TRP for needing to access belongs to the TRP groups of the ownership；And/or
    Receiving module, the random access lead code signal sent for receiving terminal according to the PRACH resource allocation informations.
  18. 18. TRP as claimed in claim 17, it is characterised in that the receiving module is receiving the terminal according to After the random access lead code signal that PRACH resource allocation informations are sent, the sending module is additionally operable to：Send Stochastic accessing Response.
  19. 19. the TRP as described in claim 17 or 18, it is characterised in that the sending module is additionally operable to：
    After the initial sync signal of TRP groups belonging to sending and the system information of affiliated TRP groups, the TRP is sent System information, the PRACH resource allocation informations of the TRP are carried in the system information of the TRP.
  20. 20. the TRP as described in claim 17 or 18, it is characterised in that included in the system information of the TRP groups and belong to described Each TRP of TRP groups PRACH resource allocation informations.
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