WO2018028436A1 - Procédé d'accès aléatoire, dispositif côté réseau et terminal - Google Patents

Procédé d'accès aléatoire, dispositif côté réseau et terminal Download PDF

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Publication number
WO2018028436A1
WO2018028436A1 PCT/CN2017/094604 CN2017094604W WO2018028436A1 WO 2018028436 A1 WO2018028436 A1 WO 2018028436A1 CN 2017094604 W CN2017094604 W CN 2017094604W WO 2018028436 A1 WO2018028436 A1 WO 2018028436A1
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WIPO (PCT)
Prior art keywords
trp
random access
terminal
trp group
group
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PCT/CN2017/094604
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English (en)
Chinese (zh)
Inventor
王磊
郑方政
潘学明
陈润华
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电信科学技术研究院
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Publication of WO2018028436A1 publication Critical patent/WO2018028436A1/fr

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    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method for random access, a network side device, and a terminal.
  • the mobile Internet is subverting the traditional mobile communication business model, providing users with an unprecedented experience, which has a profound impact on all aspects of people's work and life.
  • the mobile Internet will promote the further upgrade of human social information interaction methods, providing users with a richer business experience such as augmented reality, virtual reality, ultra high definition (3D) 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 has expanded the range of services for mobile communications, from human-to-human communication to the intelligent interconnection of people and things, things and things, making mobile communication technology penetrate into a wider range of industries and fields.
  • 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.
  • 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.
  • the terminal The machine access procedure is divided into contention-based random access and non-contention random access according to whether dedicated resources are allocated.
  • contention-based random access procedure different terminals may use the same resource; in a non-contention random process, different terminals use different resources for random access.
  • the flow chart of the two random access processes is shown in FIG. 1 and FIG. 2.
  • the resource configuration information required by the base station to carry the random access in the system message (such as SIB2) includes: a system information block physical random access channel configuration PRACH-ConfigSIB, and a random access channel communication configuration RACH-ConfigComm.
  • the entire random access procedure includes the message Msg1-Msg4.
  • the base station configures exclusive resources for each accessed terminal, so only the Msg 1 and Msg 2 can complete the access process.
  • the msg1 is a preamble preamble sent by the terminal on a PRACH (Physical Random Access Channel) resource configured by the base station, and the Msg 2 includes a preamble index, a timing advance command, and a random access response.
  • the Msg3 contains the unique identifier of the UE, and the Msg 4 includes the contention resolution flag Resolve contention and the terminal C-RNTI determined by the temporary C-RNTI.
  • the terminal after completing the downlink synchronization and correctly receiving the primary information MIB, SIB1, and SIB2, the terminal completes the random access procedure on the resources configured in the SIB2.
  • the base station working bandwidth may include multiple sub-bands (different sub-bands may have different sub-carrier spacing, and the terminal may only work on a certain sub-band), or
  • the current random access procedure is not applicable to the application scenarios of some wireless communication systems.
  • the purpose of the disclosure is to provide a method for random access, a network side device, and a terminal, so that the terminal accesses the group of sending and receiving nodes in the network to meet the requirements of the communication system.
  • an embodiment of the present disclosure provides a method for random access, including:
  • the target TRP that has sent the downlink synchronization signal and the system information in the TRP group that the terminal camps on, and feeds back the random access response of the TRP group to the terminal according to the preamble. response.
  • Part of the TRP within the TRP group is synchronized.
  • the step of transmitting, by the at least one TRP, the downlink synchronization signal to the terminal and the system information of the TRP group in which the TRP is located includes:
  • At least one of the TRP groups operating in the low frequency band transmits a downlink synchronization signal and system information of the TRP group to the terminal.
  • the step of receiving the preamble sent on the random access resource carried in the system information of the TRP group in which the terminal resides includes:
  • At least one TRP in the TRP group receives a preamble sent by the terminal on a random access resource carried in system information of a TRP group in which the terminal resides.
  • the step of feeding back the random access response response of the TRP group to the terminal includes:
  • the step of obtaining the random access response response of the TRP group according to the random access response information generated by the preamble received by the target TRP includes:
  • the target TRP group if only the target TRP receives the preamble sent by the terminal, the random access response response of the TRP group is generated by the target TRP.
  • the step of generating the random access response response of the TRP group by the target TRP includes:
  • the multiple target TRPs exchange the random access response information generated by each of the target TRPs to obtain a random access response response of the TRP group.
  • the random access response of the TRP group is obtained according to random access response information generated by other TRPs in the TRP group that have not sent the downlink synchronization signal and the system information but received the preamble sent by the terminal.
  • the steps to respond include:
  • the generated random access response information is sent by the other TRP to the target TRP, and the target TRP is according to the random access.
  • the response information is obtained, and the random access response response of the TRP group is obtained.
  • the step of feeding back the random access response response of the TRP group to the terminal includes:
  • an embodiment of the present disclosure further provides a network side device, including:
  • a first sending module configured to send, by the at least one TRP in the TRP group of the receiving node, a downlink synchronization signal to the terminal, and to send system information of the TRP group in which the TRP is located, where the system information carries random access resource information;
  • a first receiving module configured to receive a preamble sent by the terminal on a random access resource indicated by the random access resource information carried in the system information of the TRP group in which the terminal resides; where the terminal resides in the TRP The group is selected by the terminal according to the downlink synchronization signal it receives;
  • a second sending module configured to: in the TRP group in which the terminal resides, a target TRP that has sent the downlink synchronization signal and the system information, and feeds back to the terminal according to the preamble Random access response response of the TRP group.
  • TRPs in the TRP group are synchronized; or part of the TRPs in the TRP group are synchronized.
  • the first sending module includes:
  • the first sending submodule is configured to send, by the TRP in the low frequency band, at least one TRP group to the terminal to send a downlink synchronization signal and system information of the TRP group.
  • the first receiving module includes:
  • the receiving submodule is configured to: at least one TRP in the TRP group receives a preamble sent by the terminal on a random access resource carried in system information of a TRP group in which the terminal resides.
  • the second sending module includes:
  • a processing submodule configured to obtain a random access response response of the TRP group according to the random access response information generated by the preamble received by the target TRP, and/or according to the downlink in the TRP group a synchronization access signal and the system information but receiving the random access response information generated by the other TRPs of the preamble sent by the terminal, obtaining a random access response response of the TRP group, and feeding back to the terminal by the target TRP The random access response response of the TRP group.
  • the processing submodule includes:
  • a first processing unit configured to: in the TRP group, if only the target TRP receives the preamble sent by the terminal, the random access response response of the TRP group is generated by the target TRP.
  • the first processing unit includes:
  • a processing subunit configured to: in the TRP group, if multiple target TRPs respectively receive the preamble sent by the terminal, the multiple target TRPs exchange the random access response information generated by the respective TRP groups to obtain the TRP group Random access response response.
  • the processing submodule includes:
  • a second processing unit configured to: in the TRP group, if the other TRP receives the preamble sent by the terminal, sending, by the other TRP, the generated random access response information to the target TRP, where the target The TRP obtains a random access response response of the TRP group according to the random access response information.
  • the second sending module includes:
  • a second sending submodule configured to feed back, by the terminal, a random access response response of the TRP group by using a sending manner that is the same as sending the downlink synchronization signal and the system information.
  • an embodiment of the present disclosure further provides a method for random access, including:
  • the terminal sends a preamble on the random access resource indicated by the random access resource information of the TRP group;
  • the terminal receives the random access that is sent by the target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the preamble Response response.
  • the step of determining, by the terminal, the resident TRP group according to the received downlink synchronization signal of the TRP group of the sending and receiving node includes:
  • the terminal acquires a signal strength of a downlink synchronization signal of the received TRP group
  • the TRP group corresponding to the downlink synchronization signal with the highest signal strength among the downlink synchronization signals of all the received TRP groups is determined to be the TRP group in which the terminal resides.
  • the random access response response is obtained by the target TRP according to the random access response information generated by the preamble received by the target TRP, and/or according to the downlink synchronization that is not sent according to the TRP group.
  • the signal and the system information are obtained by receiving random access response information generated by other TRPs of the preamble transmitted by the terminal.
  • TRP group wherein all TRPs in the TRP group are synchronized, and at least one TRP sends a downlink synchronization signal and system information;
  • Part of the TRP within the TRP group is synchronized.
  • the TRP in the low frequency band of the TRP group sends a downlink synchronization signal and system information of the TRP group to the terminal.
  • an embodiment of the present disclosure further provides a terminal, including:
  • a processing module configured to determine, by the terminal, the resident TRP group according to the downlink synchronization signal of the received TRP group, and obtain system information of the TRP group; where the system information carries random access resource information;
  • a third sending module configured to send, by the terminal, a preamble on a random access resource indicated by the random access resource information of the TRP group;
  • a second receiving module configured to receive, by the terminal, a target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the bandwidth of receiving the downlink synchronization signal of the TRP group, according to the The random access response response of the preamble feedback.
  • the processing module includes:
  • Obtaining a submodule configured to acquire, by the terminal, a signal strength of a downlink synchronization signal of the received TRP group;
  • the determining submodule is configured to determine, according to the signal strength, that the TRP group corresponding to the downlink synchronization signal with the highest signal strength among the downlink synchronization signals of all the received TRP groups is the TRP group in which the terminal resides.
  • the random access response response is obtained by the target TRP according to the random access response information generated by the preamble received by the target TRP, and/or according to the downlink synchronization that is not sent according to the TRP group.
  • the signal and the system information are obtained by receiving random access response information generated by other TRPs of the preamble transmitted by the terminal.
  • TRPs in the TRP group are synchronized, but at least one of the TRPs sends downlink synchronization signals and system information;
  • Part of the TRP within the TRP group is synchronized.
  • the TRP in the low frequency band of the TRP group sends a downlink synchronization signal and system information of the TRP group to the terminal.
  • An embodiment of the present disclosure further provides a network side device, including: a transceiver, a processor, and a memory, where
  • the transceiver is configured to send, by the at least one TRP in the TRP group of the receiving node, the downlink synchronization signal to the terminal, and the system information of the TRP group in which the TRP is located, where the system information carries random access resource information; And receiving a preamble sent on the random access resource indicated by the random access resource information carried in the system information of the TRP group in which the terminal resides; wherein the TRP group in which the terminal resides is received by the terminal according to the terminal The selected downlink synchronization signal is selected;
  • the processor by executing the program and data stored in the memory, for transmitting, in the TRP group in which the terminal resides, the downlink synchronization signal and the target TRP of the system information, And feeding back, according to the preamble, a random access response response of the TRP group to the terminal.
  • An embodiment of the present disclosure further provides a terminal, including: a transceiver, a processor, and a memory, where
  • the processor by executing the program and data stored in the memory, is configured to determine a resident TRP group according to the received downlink synchronization signal of the TRP group of the transmitting and receiving node, and obtain system information of the TRP group;
  • the system information carries random access resource information;
  • the transceiver is configured to send a preamble on a random access resource indicated by the random access resource information of the TRP group, and configured to receive the TRP on a bandwidth of receiving a downlink synchronization signal of the TRP group.
  • the downlink synchronization signal and the target TRP of the system information have been sent in the group according to the random access response response fed back by the preamble.
  • At least one TRP in the TRP group sends a downlink synchronization signal and system information of the TRP group in which the TRP is located, where the system information carries random access resource information. Then, the TRP of the TRP group can receive the preamble sent by the terminal on the random access resource corresponding to the TRP group. Then, the downlink synchronization signal and the target TRP of the system information are sent in the TRP group, and the random access response response of the TRP group is fed back to the terminal.
  • the terminal can access the TRP group including at least one TRP in the network, and implement different working in different sub-bands within the working bandwidth of the access station or different beam directions sent by the station, so as to meet the requirement of a wider data transmission rate of the mobile communication system.
  • Support more terminal access ensure lower network latency, and provide a richer set of services.
  • FIG. 1 is a schematic diagram of a contention-based random access procedure in an LTE system of the related art
  • FIG. 2 is a schematic diagram of a non-contention random access procedure in an LTE system of the related art
  • FIG. 3 is a flowchart of basic steps of a method for random access according to a first embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a TRP group of a first example and a second example in a method for random access according to a first embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a TRP group of a third example and a fourth example in the method for random access according to the first embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a TRP group of a fifth example and a sixth example in the method for random access according to the first embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a network side device according to a second embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a network side device according to a third embodiment of the present disclosure.
  • FIG. 9 is a flowchart of basic steps of a method for random access according to a fourth embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a terminal according to a fifth embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a terminal according to a sixth embodiment of the present disclosure.
  • a method for random access according to a first embodiment of the present disclosure includes:
  • Step 301 Send at least one TRP in the TRP group of the receiving node to send a downlink synchronization signal to the terminal, and send system information of the TRP group in which the TRP is located.
  • the system information carries random access resource information.
  • Step 302 Receive a preamble sent by the terminal on a random access resource indicated by the random access resource information carried in the system information of the TRP group in which the terminal resides; where the TRP group in which the terminal resides is a terminal basis.
  • the downlink synchronization signal of the received TRP group is selected;
  • Step 303 In the TRP group where the terminal is camped, the downlink synchronization signal and the target TRP of the system information have been sent, and the randomness of the TRP group is fed back to the terminal according to the preamble. Access response response.
  • At least one TRP sends a downlink synchronization signal to the terminal and system information of the TRP group in which the TRP is located, where the system information carries a random access resource configuration. Therefore, when receiving the downlink synchronization signal, the terminal can select to camp on the TRP group according to the received downlink synchronization signal (the TRP group has its corresponding TRP group address ID), and obtain the TRP group after the terminal selects to camp on the TRP group.
  • the system information of the TRP group sends a preamble on the random access resource indicated by the random access resource information according to the random access resource information carried therein.
  • At least one TRP of the TRP group can receive the preamble sent by the terminal on the corresponding random access resource.
  • the downlink synchronization signal and the target TRP of the system information are sent, and the random access response response of the TRP group is fed back to the terminal according to the preamble.
  • the terminal can access the TRP group including at least one TRP in the network, and respectively work on different sub-bands within the working bandwidth of the access station or different beam directions sent by the station, so as to meet the needs of the mobile communication system for wider data. Transmission rates, support for more terminal access, lower network latency and the need for a richer set of services.
  • step 301 includes:
  • Step 3011 The TRP in the low frequency band of the TRP group sends a downlink synchronization signal and system information of the TRP group to the terminal.
  • the downlink synchronization signal and the system information of the TRP group may be sent to the terminal by working in the low frequency band TRP, or the downlink synchronization signal and the system information of the TRP group may be sent to the terminal by working in the high frequency band TRP.
  • the system information of the TRP group (such as the main system information block MIB and the system information block SIB-X) is configuration information that is valid for all TRPs in the TRP group area (SIA, System Information Area), and may be configured by At least one TRP (eg, one, multiple, or all TRPs) within the TRP group may be transmitted by at least one TRP operating in the low frequency band or at least one TRP operating in the high frequency band within the TRP group.
  • TRP eg, one, multiple, or all TRPs
  • the downlink synchronization signal may be single-stage or multi-stage, and the downlink synchronization signal is sent by the TRP that sends the system information, so that the terminal selects the resident TRP group according to the downlink synchronization information.
  • the terminal can detect one or more downlink synchronization signals 1 and downlink synchronization signals 2 (sync 1/2), and considers the received signal when detecting sync 1/2 corresponding to multiple TRP groups. The quality of the TRP group corresponding to the sync 1/2 of the signal strength can be selected to reside.
  • each TRP in the TRP group has a corresponding ID
  • each TRP may also have a specific physical layer configuration, such as a subcarrier spacing, a bandwidth, and the like.
  • each TRP can also have corresponding synchronization information and own system information.
  • the terminal of the idle IDLE can reside in the TRP group, and the terminal of the IDLE does not need to recognize the TRP before random access.
  • all TRPs in the TRP group are synchronized, but at least one TRP sends a downlink synchronization signal and system information; or a part of the TRPs in the TRP group are synchronized.
  • step 302 includes:
  • Step 3021 At least one TRP in the TRP group receives a preamble sent by the terminal on a random access resource carried in system information of a TRP group in which the terminal resides.
  • the target TRP in the TRP group can feed back the TRP group to the terminal. Random access response response.
  • the step of feeding back the random access response response of the TRP group to the terminal in step 303 includes:
  • Step 3031 According to the random access response information generated by the preamble received by the target TRP, And/or random access response information generated by other TRPs in the TRP group that have not sent the downlink synchronization signal and the system information but received the preamble sent by the terminal, to obtain a random access response of the TRP group. Responding to, and feeding back, by the target TRP, the random access response response of the TRP group to the terminal.
  • the TRP in the TRP group does not necessarily send the downlink synchronization signal and the system information, that is, the TRP in the TRP group is not necessarily the target TRP. Therefore, as in step 3031, the random access generated according to the preamble received by the target TRP is required.
  • the target TRP then feeds back to the terminal the random access response response of the TRP group.
  • step 3031 the step of obtaining the random access response response of the TRP group according to the random access response information generated by the preamble received by the target TRP includes:
  • Step 3031a in the TRP group, if only the target TRP receives the preamble sent by the terminal, the random access response response of the TRP group is generated by the target TRP.
  • the random access response response of the TRP group can be directly generated by the target TRP.
  • step 3031a includes:
  • Step 3031a1 In the TRP group, if multiple target TRPs respectively receive the preamble sent by the terminal, the multiple target TRPs exchange the random access response information generated by the respective TRP groups to obtain random access of the TRP group. Response response.
  • the target TRP cannot determine that the random access response information generated by the target TRP corresponds to all the terminals that send the preamble to the TRP group. Therefore, in the TRP group, as in step 3031a1, multiple target TRPs exchange each other for random generation.
  • the access response information is obtained, and a random access response response of the TRP group is obtained.
  • the random access response response of the TRP group obtained by the target TRP can include complete random access response information, and feedback to the TRP group for target TRP reception.
  • the terminal corresponding to the preamble.
  • the mutual exchange of random access response responses between target TRPs may be, but is not limited to, implemented by a backhaul link between TRPs.
  • the TRP group is obtained according to random access response information generated by other TRPs in the TRP group that have not sent the downlink synchronization signal and the system information but received the preamble sent by the terminal.
  • the steps of the random access response response include:
  • Step 3031b in the TRP group, if the other TRP receives the preamble sent by the terminal, the generated random access response information is sent by the other TRP to the target TRP, where the target TRP is according to the Random access response information, obtaining a random access response response of the TRP group.
  • the other TRP receives the preamble sent by the terminal, and after the other TRP generates the corresponding random access response information, the other TRP cannot feed back the random access response of the TRP group to the terminal, so, as in step 3031b
  • the other TRP needs to send the generated random access response information to the target TRP, and then the target TRP that can feed back the random access response response of the TRP group to the terminal obtains the TRP group according to the received random access response information. Random access response response.
  • the specific implementation of the random access response information generated by the other TRPs to the target TRP includes, but is not limited to, the other TRPs transmitting the random access response information generated by the TRP through the backhaul link between the TRPs to the target TRP.
  • the preamble sent by the terminal is received.
  • the other TRPs send the generated random access response information to the target TRP, multiple target TRPs need to be exchanged with each other.
  • the random access response information so that the target TRP can obtain a random access response response including complete random access response information, and feed it back to the terminal.
  • step 303 the step of feeding back the random access response response of the TRP group to the terminal includes:
  • Step 3032 The random access response response of the TRP group is fed back to the terminal by using a sending manner that is the same as sending the downlink synchronization signal and the system information.
  • the terminal can attempt to receive the random access response response of the TRP group on the bandwidth of receiving the downlink synchronization signal and the system information.
  • the downlink synchronization signal and the TRP group are sent in the TRP group.
  • the target TRP of the system information can be: detecting a preamble sent by the receiving terminal on the random access resource of the TRP group; receiving a preamble in the TRP group that has not sent the downlink synchronization signal and the system information but receives the preamble sent by the terminal Random access response information generated by other TRPs, for example, through a backhaul link; includes multiple target TRPs in the TRP group, and exchanges random access response information between target TRPs, for example, through backhaul link exchange; The preamble and the random access response information of other TRP notifications are sent to the random access response of the TRP group.
  • the TRP that has not sent the downlink synchronization signal and the system information of the TRP group in the TRP group can implement: detecting the preamble sent by the receiving terminal on the random access resource of the TRP group; When detecting the preamble sent by the terminal on the random access resource, the target TRP in the TRP group is notified of the random access response information, for example, through the backhaul link. In addition, the TRP that has not sent the downlink synchronization signal and the system information of the TRP group does not feed back the random access response response of the TRP group to the terminal.
  • the target TRP in the TRP group sends the downlink synchronization signal and the system information of the TRP group to the terminal, and at least one TRP of the TRP group can receive the terminal to select to camp on the TRP.
  • the terminal works on different sub-bands within the working bandwidth of the access station or different beam directions sent by the station, so that the mobile communication system needs a wider data transmission rate, supports more terminal access, and ensures a lower network. Delay and provide a richer set of business needs.
  • the random access response response of the TRP group fed back to the terminal is obtained by different methods according to different conditions of receiving the preamble in the TRP group, and has better practicability.
  • the first case is a first case:
  • a TRP group contains multiple TRPs, and all TRPs in the TRP group are synchronized. At least one TRP (target TRP) in the TRP group transmits a secondary downlink synchronization signal (sync 1/2) and system information of the TRP group.
  • target TRP target TRP
  • secondary downlink synchronization signal sync 1/2
  • the terminal receives the downlink synchronization signal in a specific resource detection, and selects the sync 1/2 with the highest signal strength as the downlink synchronization signal of the resident TRP group according to all the received downlink synchronization signals, and according to The received sync1/2 determines the TRP group ID and the downlink timing.
  • the system information (MIB and SIB-X) of the transmitted TRP group is valid for the TRP group area (SIA) 400, and the system information carries random access resources (such as included in the SIB-X). Physical random access channel PRACH resource configuration information of the TRP group).
  • the terminal acquires the PRACH resource configuration information (that is, the configuration information of the physical random access resource) according to the TRP group ID and the downlink sequence, and sends a preamble on the PRACH resource specified by the PRACH resource configuration information.
  • the PRACH resource configuration information that is, the configuration information of the physical random access resource
  • the terminal UE1 that is camped on the TRP group needs to access the network, and after receiving the PRACH resource configuration information included in the SIB-X of the system information of the TRP group, the UE1 sends the resource indicated by the PRACH resource configuration information. Preamble.
  • At least one TRP in the TRP group detects that the preamble sent by the UE1 is received on the PRACH resource. After receiving the preamble, the TRP group sends a random access response response by at least one TRP that sends sync 1/2 and system information of the TRP group.
  • the TRP that sends the synchronization 1/2 and the system information of the TRP group receives the preamble sent by the UE1, sends a random access response response according to the received preamble, and carries the received preamble related information in the random access response response. .
  • the preamble-related random access response information needs to be notified to send the sync 1/2 and the system information of the TRP group.
  • the TRP is notified by means of a backhaul link notification, and a random access response is sent by a TRP that sends sync1/2 and system information of the TRP group.
  • UE1 attempts to receive a random access response response of the TRP group on the bandwidth of receiving sync 1/2 and system information of the TRP group.
  • multiple terminals in the coverage of the TRP group send different preambles on the resources indicated by the PRACH resource configuration information of the SIB-X.
  • the TRP in the TRP group detects the receiving preamble on the PRACH resource.
  • TRP1 receives the preamble sent by UE3
  • TRP2 receives the preamble sent by UE2
  • TRP1 and TRP2 are the TRPs that send sync1/2 and the system information of the TRP group in the TRP group.
  • TRP1 and TRP2 need to exchange random access response information generated by each other according to the received preamble, so as to obtain random access response information in the TRP group.
  • TRP1 and TRP2 exchange each other's random access response information through a backhaul link or the like.
  • TRP1 and TRP2 After TRP1 and TRP2 obtain complete random access response information (in the second example, including random access response information for UE3 and random access response information of UE2), the complete random access response information is used as the TRP.
  • the random access response response of the group is sent to the terminal within the coverage of the TRP group.
  • UE3 and UE2 attempt to receive the random access response response on the bandwidth receiving the sync 1/2 and the system information of the TRP group.
  • the random access response information related to the received preamble needs to be sent to the transmission sync1/ 2 and the TRP of the system information of the TRP group, the random access response information shall include all received preamble related random access response information in the TRP group.
  • a TRP group contains multiple TRPs, and the TRPs in the TRP group are not all synchronized.
  • At least one TRP (target TRP) in the TRP group transmits a secondary downlink synchronization signal (sync 1/2) and system information of the TRP group.
  • the terminal receives the downlink synchronization signal in a specific resource detection, and selects the sync 1/2 with the strongest signal strength as the downlink synchronization signal of the resident TRP group according to all the received downlink synchronization signals, and determines the TRP group according to the received sync 1/2. ID and downlink timing.
  • the system information (MIB and SIB-X) of the transmitted TRP group is valid for the TRP group area (SIA) 500, and the system information carries random access resources (such as included in the SIB-X). PRACH resource configuration information of the TRP group).
  • the terminal acquires the PRACH resource configuration information according to the TRP group ID and the downlink sequence, and sends the preamble preamble on the PRACH resource specified by the PRACH resource configuration information.
  • the terminal UE4 that is camped on the TRP group needs to access the network, and after receiving the PRACH resource configuration information included in the SIB-X of the system information of the TRP group, the UE4 sends the resource indicated by the PRACH resource configuration information. Preamble.
  • At least one TRP in the TRP group detects that the UE4 sends the received on the PRACH resource. Preamble.
  • the TRP group After receiving the preamble, the TRP group sends a random access response response by at least one TRP that sends sync 1/2 and system information of the TRP group.
  • the TRP that sends the sync 1/2 and the system information of the TRP group receives the preamble sent by the UE4, sends a random access response response according to the received preamble, and carries the received preamble related information in the random access response response. .
  • the preamble-related random access response information needs to be notified to send the sync 1/2 and the system information of the TRP group.
  • the TRP is notified by means of a backhaul link notification, and a random access response is sent by a TRP that sends sync1/2 and system information of the TRP group.
  • the UE 4 attempts to receive a random access response response of the TRP group on the bandwidth of receiving the sync 1/2 and the system information of the TRP group.
  • multiple terminals in the coverage of the TRP group send different preambles on the resources indicated by the PRACH resource configuration information of the SIB-X.
  • the TRP in the TRP group detects the receiving preamble on the PRACH resource.
  • TRP1 receives the preamble sent by UE5
  • TRP2 receives the preamble sent by UE6
  • TRP1 and TRP2 are the TRPs that send sync1/2 and the system information of the TRP group in the TRP group.
  • TRP1 and TRP2 need to exchange random access response information generated by each other according to the received preamble, so as to obtain random access response information in the TRP group.
  • TRP1 and TRP2 exchange each other's random access response information through a backhaul link or the like.
  • TRP1 and TRP2 After TRP1 and TRP2 obtain complete random access response information (in the fourth example, including random access response information for UE5 and random access response information of UE6), the complete random access response information is used as the TRP.
  • the random access response response of the group is sent to the terminal within the coverage of the TRP group.
  • UE5 and UE6 attempt to receive the random access response response on the bandwidth receiving the sync 1/2 and the system information of the TRP group.
  • the random connection related to the received preamble needs to be received.
  • the incoming response information is sent to the TRP that sends sync 1/2 and the system information of the TRP group, and the random access response information should include all received preamble related random access response information in the TRP group.
  • a TRP group contains multiple TRPs, some TRPs operate in the low frequency band, and some TRPs operate in the high frequency band. At least one TRP (target TRP) operating in the low frequency band transmits a secondary downlink synchronization signal (sync 1/2) and system information of the TRP group.
  • target TRP secondary downlink synchronization signal
  • the terminal can complete the selection and camping of the TRP group by receiving sync 1/2, and receive the system information MIB and SIB-X of the TRP group. As shown in FIG. 6, the system information (MIB and SIB- of the TRP group sent) is sent. X) is valid for the TRP group area (SIA) 600.
  • the terminal transmits the preamble preamble on the PRACH resource specified by the PRACH resource configuration information according to the received PRACH resource configuration information of the TRP group in the received SIB-X.
  • the terminal UE7 that is camped on the TRP group needs to access the network, and after receiving the PRACH resource configuration information included in the SIB-X of the system information of the TRP group, the UE7 sends the resource indicated by the PRACH resource configuration information.
  • the PRACH resource can be in the high frequency band or in the low frequency band.
  • At least one TRP in the TRP group detects that the preamble sent by the UE 7 is received on the PRACH resource.
  • the TRP group After receiving the preamble, the TRP group sends a random access response response by at least one TRP that sends sync 1/2 and system information of the TRP group.
  • the TRP that sends the sync 1/2 and the system information of the TRP group receives the preamble sent by the UE 7, sends a random access response response according to the received preamble, and carries the received preamble related information in the random access response response. ;
  • the preamble-related random access response information needs to be notified to send the sync 1/2 and the system information of the TRP group.
  • the TRP is notified by means of a backhaul link notification, and a random access response is sent by a TRP that sends sync1/2 and system information of the TRP group.
  • the UE 7 attempts to receive a random access response response of the TRP group on the bandwidth of receiving the sync 1/2 and the system information of the TRP group.
  • the multiple terminals in the coverage of the TRP group send different preambles on the resources indicated by the PRACH resource configuration information of the SIB-X.
  • the TRP in the TRP group detects the receiving preamble on the PRACH resource.
  • TRP1 receives the preamble sent by UE8
  • TRP2 receives the preamble sent by UE9
  • TRP1 and TRP2 are the TRPs that send sync1/2 and the system information of the TRP group in the TRP group. Then, TRP1 and TRP2 need to exchange random access response information generated by each other according to the received preamble, so as to obtain random access response information in the TRP group.
  • TRP1 and TRP2 exchange each other's random access response information through a backhaul link or the like. After TRP1 and TRP2 obtain complete random access response information (in the sixth example, including random access response information for UE8 and random access response information of UE9), the complete random access response information is used as the TRP. The random access response response of the group is sent to the terminal within the coverage of the TRP group.
  • the UE 8 and the UE 9 attempt to receive the random access response response on the bandwidth receiving the sync 1/2 and the system information of the TRP group.
  • the random access response information related to the received preamble needs to be sent to the transmission sync 1/1 2 and the TRP of the system information of the TRP group, the random access response information shall include all received preamble related random access response information in the TRP group.
  • the second embodiment of the present disclosure further provides a network side device, including:
  • the first sending module 701 is configured to send, by the at least one TRP in the TRP group of the receiving node, the downlink synchronization signal to the terminal, and the system information of the TRP group in which the TRP is located.
  • the system information carries the random access resource information.
  • the first receiving module 702 is configured to receive a preamble sent by the terminal on a random access resource indicated by the random access resource information carried in the system information of the TRP group in which the terminal resides; where the terminal resides The TRP group is selected by the terminal according to the downlink synchronization signal of the TRP group it receives;
  • a second sending module 703 configured to send, in the TRP group where the terminal resides Deriving a downlink access signal and a target TRP of the system information, and feeding back, according to the preamble, a random access response response of the TRP group to the terminal.
  • all TRPs in the TRP group are synchronized, but at least one TRP sends a downlink synchronization signal and system information; or
  • Part of the TRP within the TRP group is synchronized.
  • the first sending module includes:
  • the first sending submodule is configured to send, by the TRP in the low frequency band, at least one TRP group to the terminal to send a downlink synchronization signal and system information of the TRP group.
  • the first receiving module includes:
  • the receiving submodule is configured to: at least one TRP in the TRP group receives a preamble sent by the terminal on a random access resource carried in system information of a TRP group in which the terminal resides.
  • the second sending module includes:
  • a processing submodule configured to obtain a random access response response of the TRP group according to the random access response information generated by the preamble received by the target TRP, and/or the downlink synchronization is not sent in the TRP group And obtaining, by the signal and the system information, the random access response information generated by the other TRPs of the preamble sent by the terminal, obtaining a random access response response of the TRP group, and feeding back, by the target TRP, the terminal Random access response response of the TRP group.
  • the processing submodule includes:
  • a first processing unit configured to: in the TRP group, if only the target TRP receives the preamble sent by the terminal, the random access response response of the TRP group is generated by the target TRP.
  • the first processing unit includes:
  • a processing subunit configured to: in the TRP group, if multiple target TRPs respectively receive the preamble sent by the terminal, the multiple target TRPs exchange the random access response information generated by the respective TRP groups to obtain the TRP group Random access response response.
  • the processing submodule includes:
  • a second processing unit configured to: in the TRP group, if the other TRP receives the preamble sent by the terminal, sending, by the other TRP, the generated random access response information to the target TRP, where the target The TRP obtains a random access response response of the TRP group according to the random access response information.
  • the second sending module includes:
  • a second sending submodule configured to feed back, by the terminal, a random access response response of the TRP group by using a sending manner that is the same as sending the downlink synchronization signal and the system information.
  • the at least one TRP in the TRP group sends the downlink synchronization signal and the system information of the TRP group to the terminal, and at least one TRP in the TRP group can receive the terminal to select to camp on the TRP.
  • the terminal works on different sub-bands within the working bandwidth of the access station or different beam directions sent by the station, so that the mobile communication system needs a wider data transmission rate, supports more terminal access, and ensures a lower network. Delay and provide a richer set of business needs.
  • the random access response response of the TRP group fed back to the terminal is obtained by different methods according to different conditions of receiving the preamble in the TRP group, and has better practicability.
  • the network side device provided by the second embodiment of the present disclosure is a device that applies the method for random access provided by the foregoing first embodiment, and all embodiments of the foregoing random access method are applicable to the network. Side devices, and all achieve the same or similar benefits.
  • the third embodiment of the present disclosure further provides a network side device, where the network side device includes: a processor 800; and is connected to the processor 800 through a bus interface. a memory 820, and a transceiver 810 connected to the processor 800 through a bus interface; the memory 820 is configured to store programs and data used by the processor 800 when performing operations;
  • the transceiver 810 is configured to send, by the at least one TRP in the TRP group of the receiving node, the downlink synchronization signal to the terminal, and the system information of the TRP group in which the TRP is located, where the system information carries random access resource information;
  • the transceiver 810 is further configured to receive a preamble sent on a random access resource indicated by the random access resource information carried in the system information of the TRP group in which the terminal resides; wherein the terminal resides
  • the TRP group is selected by the terminal according to the downlink synchronization signal of the TRP group it receives.
  • the processor 800 calls and executes the program and data stored in the memory, the following functions are implemented: the processor 800 is configured to: in the group of TRPs in which the terminal resides, a downlink synchronization signal and a target TRP of the system information, according to the preamble, to the end The terminal feeds back the random access response response of the TRP group.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 810 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.
  • the third embodiment of the present disclosure provides that the network side device corresponds to the network side device provided by the foregoing second embodiment, and therefore all embodiments of the random access method provided by the foregoing first embodiment are applicable to the Network side devices, and can achieve the same or similar benefits.
  • the fourth embodiment of the present disclosure further provides a method for random access, including:
  • Step 901 The terminal determines, according to the received downlink synchronization signal of the TRP group of the sending and receiving node, the resident TRP group, and obtains system information of the TRP group, where the system information carries random access resource information.
  • Step 902 The terminal sends a preamble on the random access resource indicated by the random access resource information of the TRP group.
  • Step 903 The terminal receives, on the bandwidth of the downlink synchronization signal of the TRP group, the target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the preamble feedback. Random access response response.
  • the at least one TRP in the TRP group sends the downlink synchronization signal to the terminal and the system information of the TRP group in which the TRP is located. Therefore, the terminal determines the resident TRP group according to the downlink synchronization signal of the received TRP group, and obtains the System information of the TRP group.
  • the terminal sends a preamble on the random access resource indicated by the random access resource information according to the random access resource information carried in the system information, so as to determine that at least one TRP in the resident TRP group receives the Preamble.
  • the terminal can receive the random access response response that the target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the preamble is received on the bandwidth of the downlink synchronization signal of the TRP group.
  • the terminal realizes that the terminal includes at least one TRP TRP group in the access network, and works on different sub-bands within the working bandwidth of the access station or different beam directions sent by the station, so that the mobile communication system needs wider data transmission. Speed, support for more terminal access, guarantee lower network latency and provide a richer set of services.
  • step 901 the step of determining, by the terminal, the resident TRP group according to the received downlink synchronization signal of the TRP group of the transmitting and receiving node includes:
  • Step 9011 The terminal acquires a signal strength of a downlink synchronization signal of the received TRP group.
  • Step 9012 Determine, according to the signal strength, that the TRP group corresponding to the downlink synchronization signal with the highest signal strength among the downlink synchronization signals of all the received TRP groups is the TRP group where the terminal resides.
  • the TRP group in which the terminal resides is determined according to the signal strength of the downlink synchronization signal of the received TRP group.
  • the signal of the downlink synchronization signal received by the TRP group is obtained first.
  • the TRP group corresponding to the strength, and then determining the downlink synchronization signal with the highest signal strength among the downlink synchronization signals of all the received TRP groups is the TRP group in which the terminal resides.
  • the TRP group in which the terminal resides may be determined by referring to other parameters of the downlink synchronization signal of the TRP group, and details are not described herein again.
  • the random access response response is obtained by the target TRP according to the random access response information generated by the preamble received by the target TRP, and/or according to the downlink in the TRP group. And synchronizing the signal and the system information but receiving the random access response information generated by other TRPs of the preamble sent by the terminal.
  • the TRP group includes not only the downlink synchronization signal sent to the terminal but also the system information target TRP of the TRP group in which the TRP is located, and may also include the TRP that does not send the downlink synchronization signal and the system information TRP, so the terminal receives the preamble. It can be a target TRP and/or other TRP. Therefore, the random access response response finally received by the terminal is obtained according to the random access response information generated by the preamble received by the target TRP, and/or the downlink synchronization signal is not sent according to the TRP group and the system The information is obtained by receiving the random access response information generated by other TRPs of the preamble transmitted by the terminal.
  • TRPs in the TRP group are synchronized, but at least one of the TRPs transmits a downlink synchronization signal and system information; or a part of the TRPs in the TRP group are synchronized.
  • At least one TRP in the TRP group works in a low frequency band to send a downlink synchronization signal and system information of the TRP group to the terminal.
  • TRPs in the TRP group work in the low frequency band, and some TRPs work in the high frequency band.
  • the terminal determines the resident TRP group according to the received downlink synchronization signal of the TRP group, and obtains system information of the TRP group. Then, the preamble is sent on the random access resource indicated by the random access resource information according to the random access resource information carried in the system information, so as to determine that at least one TRP in the resident TRP group receives the preamble code. Then, the terminal receives the random access response response that the target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the preamble is received on the bandwidth of the downlink synchronization signal of the TRP group.
  • the terminal realizes that the terminal includes at least one TRP TRP group in the access network, and works on different sub-bands within the working bandwidth of the access station or different beam directions sent by the station, so that the mobile communication system needs wider data transmission.
  • Speed support for more terminal access, guarantee lower network latency and provide a richer set of services.
  • the method for random access provided by the fourth embodiment of the present disclosure cooperates with the random access method provided by the foregoing first embodiment to implement a TRP group including at least one TRP in the terminal access network, respectively.
  • a TRP group including at least one TRP in the terminal access network, respectively.
  • Working in different sub-bands within the working bandwidth of the access station or in different beam directions sent by the station, meeting the mobile communication system requires a wider data transmission rate, supporting more terminal access, ensuring lower network delay and providing The need for a richer business type. Therefore, all the embodiments of the random access method provided by the foregoing first embodiment are applicable to the random access method of the fourth embodiment, and all of the same or similar beneficial effects can be achieved.
  • the second embodiment of the present disclosure further provides a terminal, including:
  • the processing module 1001 is configured to determine, by the terminal, the resident TRP group according to the received downlink synchronization signal of the TRP group of the sending and receiving node, and obtain system information of the TRP group, where the system information is Information carries random access resource information;
  • the third sending module 1002 is configured to send, by the terminal, a preamble on a random access resource indicated by the random access resource information of the TRP group;
  • the second receiving module 1003 is configured to receive, by the terminal, a target TRP that has sent the downlink synchronization signal and the system information in the TRP group on a bandwidth of receiving the downlink synchronization signal of the TRP group.
  • the random access response response of the preamble feedback is configured to receive, by the terminal, a target TRP that has sent the downlink synchronization signal and the system information in the TRP group on a bandwidth of receiving the downlink synchronization signal of the TRP group.
  • the processing module includes:
  • Obtaining a submodule configured to acquire, by the terminal, a signal strength of a downlink synchronization signal of the received TRP group;
  • the determining submodule is configured to determine, according to the signal strength, that the TRP group corresponding to the downlink synchronization signal with the highest signal strength among the downlink synchronization signals of all the received TRP groups is the TRP group in which the terminal resides.
  • the random access response response is random access response information generated by the target TRP according to the preamble received by the target TRP, and/or in the TRP group.
  • a random access response response obtained by not transmitting the downlink synchronization signal and the system information but receiving the random access response information generated by other TRPs of the preamble transmitted by the terminal.
  • all TRPs in the TRP group are synchronized, but at least one TRP sends a downlink synchronization signal and system information; or
  • Part of the TRP within the TRP group is synchronized.
  • At least one TRP group working in the low frequency band sends a downlink synchronization signal and system information of the TRP group to the terminal.
  • the terminal provided by the sixth embodiment of the present disclosure determines the resident TRP group according to the received downlink synchronization signal of the TRP group, and obtains system information of the TRP group. Then, the preamble is sent on the random access resource indicated by the random access resource information according to the random access resource information carried in the system information, so as to determine that at least one TRP in the resident TRP group receives the preamble code. Then, the terminal receives the random access response response that the target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the preamble is received on the bandwidth of the downlink synchronization signal of the TRP group.
  • the terminal implements a TRP group that includes at least one TRP in the access network, and works on different sub-bands within the working bandwidth of the access station or in different beam directions sent by the station, respectively.
  • TRP group that includes at least one TRP in the access network, and works on different sub-bands within the working bandwidth of the access station or in different beam directions sent by the station, respectively.
  • Mobile communication systems require wider data transmission rates, support for more terminal access, guarantee lower network latency, and provide a richer set of traffic types.
  • the terminal provided by the fifth embodiment of the present disclosure is a terminal that applies the method for random access provided by the foregoing fourth embodiment, and all embodiments of the method for random access are applicable to the terminal, and Both can achieve the same or similar benefits.
  • the sixth embodiment of the present disclosure further provides a terminal, where the terminal includes: a processor 1100; a memory 1120 connected to the processor 1100 through a bus interface, And a transceiver 1110 connected to the processor 1100 through a bus interface; the memory 1120 is configured to store programs and data used by the processor 1100 when performing operations.
  • the processor 1100 is configured to determine, by the terminal, the resident TRP group according to the received downlink synchronization signal of the TRP group of the transmitting and receiving node, and obtain system information of the TRP group, where the system information carries random access Resource information.
  • the transceiver 1110 is configured to send, by the terminal, a preamble on a random access resource indicated by the random access resource information of the TRP group.
  • the transceiver 1110 is further configured to: receive, by the terminal, a target TRP that has sent the downlink synchronization signal and the system information in the TRP group according to the bandwidth of receiving the downlink synchronization signal of the TRP group, according to the The random access response response of the preamble feedback.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1110 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1130 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1100 is responsible for managing the bus architecture and the usual processing, and the memory 1120 can store the processor 1100 at The data used to perform the operation.
  • the terminal provided by the sixth embodiment of the present disclosure is different from the terminal provided by the foregoing fifth embodiment. Therefore, all embodiments of the method for random access provided by the foregoing fifth embodiment are applicable to the terminal, and both are applicable to the terminal. Can achieve the same or similar benefits.

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

Abstract

La présente invention concerne un procédé d'accès aléatoire, un dispositif côté réseau et un terminal, se rapportant au domaine des communications. Le procédé d'accès aléatoire consiste : à envoyer, par au moins un point d'émission et de réception (TRP) d'un groupe TRP, un signal de synchronisation de liaison descendante à un terminal, et à envoyer des informations de système concernant le groupe TRP où se trouve le TRP, les informations de système comportant des informations de ressource d'accès aléatoire ; à recevoir un préambule envoyé par le terminal sur une ressource d'accès aléatoire indiquée par les informations de ressources d'accès aléatoire contenues dans les informations de système du groupe TRP où se trouve le terminal, le groupe TRP où se trouve le terminal étant sélectionné par le terminal selon le signal de synchronisation de liaison descendante reçu par le terminal ; et dans le groupe TRP où se trouve le terminal, à renvoyer, par le TRP cible ayant envoyé le signal de synchronisation de liaison descendante et les informations de système, une réponse d'accès aléatoire du groupe TRP au terminal.
PCT/CN2017/094604 2016-08-12 2017-07-27 Procédé d'accès aléatoire, dispositif côté réseau et terminal WO2018028436A1 (fr)

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