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WO2015035567A1 - Procédé, appareil, et système permettant à des terminaux d'accéder à un système de nœud b évolué - Google Patents

Procédé, appareil, et système permettant à des terminaux d'accéder à un système de nœud b évolué Download PDF

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Publication number
WO2015035567A1
WO2015035567A1 PCT/CN2013/083300 CN2013083300W WO2015035567A1 WO 2015035567 A1 WO2015035567 A1 WO 2015035567A1 CN 2013083300 W CN2013083300 W CN 2013083300W WO 2015035567 A1 WO2015035567 A1 WO 2015035567A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminals
group
base station
information
target base
Prior art date
Application number
PCT/CN2013/083300
Other languages
English (en)
Chinese (zh)
Inventor
朱松
鲁振伟
李龠
郭小龙
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/083300 priority Critical patent/WO2015035567A1/fr
Priority to CN201380002255.5A priority patent/CN104662963B/zh
Publication of WO2015035567A1 publication Critical patent/WO2015035567A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for a terminal to access a base station system.
  • UE User Equipment
  • switching between base stations is an essential mechanism for ensuring continuity of communication services.
  • some special scenes such as high-speed moving trains, cars, ships, airplanes, subways, etc., there will be a large number of UEs that are close to each other, switching at the same time or within a short time interval.
  • the embodiments of the present invention provide a method, a device, and a system for a terminal to access a base station system, which are used to improve efficiency when a large number of UEs are simultaneously switched.
  • a first aspect of the present invention provides a method for a terminal to access a base station system, where the base station system includes a source base station and a target base station, and may include:
  • the source base station divides the terminals of the same type into the first group of terminals and the second group of terminals; when the measurement result of the terminal of the same type meets the preset switching condition, sending a handover request to the target base station,
  • the handover request is used to request that the first group of terminals and the second group of terminals switch from the source base station to the target base station;
  • the method further includes: if the target base station receives an access request initiated by the second group of terminals, to the first group of terminals and the second group of terminals Sending a random access response message, where the random access response message includes uplink resource allocation information and uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals acquire the uplink Resource allocation information and uplink synchronization information.
  • the method further includes: if the target base station receives the access initiated by the second group of terminals And sending, by the request, the random access response message to the first group of terminals and the second group of terminals, where the random access response message includes uplink resource allocation information of the first group of terminals, and uplink of the second group of terminals The resource allocation information and the uplink synchronization information of the second group of terminals, so that the first group of terminals acquires uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals, where the second The group terminal acquires uplink resource allocation information of the second group of terminals and uplink synchronization information of the second group of terminals.
  • the handover request response information further includes a sounding reference signal resource allocated by the target base station to the first group of terminals.
  • the method further includes: sending, to the first group of terminals, information about the sounding reference signal resources allocated by the target base station to the first group of terminals, where The first group of terminals sends a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • a second aspect of the present invention provides a method for a terminal to access a base station system, where the base station system includes a source base station and a target base station, and may include:
  • the first group of terminals receives information about the random access resources allocated by the source base station for the second group of terminals, and the second group of terminals is the same type of terminals as the first group of terminals except the first group.
  • the method further includes: receiving a random access response message sent by the target base station;
  • the method further includes:
  • the target base station Obtaining, by the target base station, the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the Uplink synchronization information of the second group of terminals, and accessing the target base station according to uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals.
  • the information that the target base station sends the sounding reference signal resource allocated by the target base station to the first group of terminals is received;
  • a third aspect of the present invention provides a base station system, which may include:
  • the source base station is configured to divide the terminals of the same type into the first group terminal and the second group terminal;
  • the group of terminals and the second group of terminals enable the first group of terminals to acquire uplink synchronization information and uplink resource allocation information according to the information of the random access resource to access the target base station.
  • the target base station is configured to send a random connection to the first group of terminals and the second group of terminals if receiving an access request initiated by the second group of terminals
  • the random access response message includes the uplink resource allocation information and the uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals acquire the uplink resource allocation information. And uplink synchronization information.
  • the target base station is further configured to: if receiving an access request initiated by the second group of terminals, Sending a random access response message to the first group of terminals and the second group of terminals, where the random access response message includes uplink resource allocation information of the first group of terminals and uplink resource allocation of the second group of terminals The information and the uplink synchronization information of the second group of terminals, so that the first group of terminals acquires uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals, and the second group of terminals Obtaining uplink resource allocation information of the second group of terminals and uplink synchronization information of the second group of terminals.
  • the handover request response information further includes a sounding reference signal resource allocated by the target base station to the first group of terminals.
  • the source base station is further configured to send, to the first group of terminals, information of sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals are in the sounding reference signal. And transmitting, by the resource, the sounding reference signal to the target base station, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • a fourth aspect of the present invention provides a base station, which may include:
  • a grouping unit configured to: the source base station divides the terminal of the same type into the first group terminal and the second group terminal;
  • a sending unit configured to send a handover request to the target base station when the measurement result of the terminal of the same type meets a preset handover condition, where the handover request is used to request the first group of terminals and the second The group terminal switches from the source base station to the target base station;
  • a receiving unit configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals;
  • the sending unit is further configured to send the information about the random access resource allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group
  • the terminal acquires uplink synchronization information and uplink resource allocation information according to the information of the random access resource to access the target base station.
  • the sending unit is further configured to send, to the first group of terminals, information of a sounding reference signal resource allocated by the target base station to the first group of terminals, where The first group of terminals sends a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • a fifth aspect of the present invention provides a base station, which may include:
  • the processor is configured to divide, by the source base station, the terminals of the same type into the first group terminal and the second group terminal;
  • the transmitter is configured to send a handover request to the target base station when the measurement result of the terminal of the same type meets a preset handover condition, where the handover request is used to request the first group of terminals and the The second group of terminals switches from the source base station to the target base station;
  • the receiver is configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals; And transmitting, to the first group of terminals and the second group of terminals, the information about the random access resources allocated to the second group of terminals, so that the first group of terminals according to the random
  • the information of the access resource acquires uplink synchronization information and uplink resource allocation information to access the target base station.
  • a sixth aspect of the present invention provides a terminal, which may include:
  • a receiving information unit configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals a terminal other than the first group of terminals;
  • an information unit configured to listen to an access response message of the second group of terminals according to the information about the random access resources of the second group of terminals received by the receiving information unit, and obtain the access response message Uplink synchronization information and uplink resource allocation information of the second group of terminals;
  • the access unit is configured to access the target base station according to the uplink synchronization information and uplink resource allocation information acquired by the acquiring unit information.
  • the receiving information unit is further configured to receive a random access response message sent by the target base station;
  • the acquiring information unit is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message;
  • the access unit is further configured to access the target base station according to uplink resource allocation information and uplink synchronization information of the second group of terminals.
  • the acquiring information unit is further configured to acquire the target included in the random access response message Uplink resource allocation information of the first group of terminals, uplink resource allocation information of the second group of terminals, and uplink synchronization information of the second group of terminals sent by the base station to the second group of terminals;
  • the access unit is further configured to access the target base station according to uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals.
  • the receiving information unit is further configured to receive, by the source base station, the target base station as the first group of terminals Information of the allocated sounding reference signal resources;
  • the device further includes: a sending signal unit, configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects the first group according to the received sounding reference signal Uplink synchronization information of the terminal.
  • a sending signal unit configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects the first group according to the received sounding reference signal Uplink synchronization information of the terminal.
  • a seventh aspect of the present invention provides a terminal, which may include:
  • the receiver is configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals. a terminal other than the first group of terminals;
  • the processor is configured to: according to the information about the random access resource of the second group of terminals received by the receiving information unit, listen to an access response message of the second group of terminals, and obtain the access response message Uplink synchronization information and uplink resource allocation information of the second group of terminals;
  • the processor is further configured to: use the uplink synchronization information acquired according to the acquiring unit information, and The uplink resource allocation information is accessed by the target base station.
  • the receiver is further configured to receive a random access response message sent by the target base station, and receive the target base station sent by the source base station as the first group of terminals.
  • Information of the allocated sounding reference signal resources
  • the processor is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message, and obtain the location included in the random access response message.
  • the processor is further configured to access the target base station according to the uplink resource allocation information and the uplink synchronization information of the second group of terminals, and the uplink resource allocation information according to the first group of terminals and the Uplink synchronization information of the two groups of terminals accesses the target base station;
  • the transmitter is configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • the source base station divides the terminals of the same type into the first group terminal and the second group terminal, and the measurement results of the terminals of the same type meet the preset switching conditions. And transmitting, to the target base station, a handover request for accessing the target base station to the target base station, where the handover request response information sent by the target base station received by the source base station only carries the information of the second group of terminal random access resources, and is allocated to the The information about the access resources of the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains the random access response of the second group of terminals according to the random access resource.
  • FIG. 1 is a schematic diagram of another embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of another embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of still another embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a terminal accessing a base station system according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of an embodiment of a base station system according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of an embodiment of a base station according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another embodiment of a base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an embodiment of a terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another embodiment of a terminal according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of still another embodiment of a terminal according to an embodiment of the present invention. detailed description
  • the embodiments of the present invention provide a method and a device for a terminal to access a base station system, which are used to improve efficiency when a large number of UEs simultaneously switch. The details are described below separately.
  • an embodiment of a method for a terminal to access a base station system includes:
  • the source base station divides the terminal of the same type into the first group terminal and the second group terminal.
  • the base station system in this embodiment includes a source base station and a target base station, where the source base station is a base station currently accessed by the terminal, and the target base station is The base station that the terminal is ready to access.
  • the source base station divides the terminals of the same type into a first group of terminals (i.e., unseeded UEs) and a second group of terminals (i.e., seeded UEs).
  • the terminal of the same type refers to a terminal that is relatively close in position and has the same action, wherein the relatively close position means that the distance between the terminals is less than a preset distance value, and the specific setting of the preset distance value is
  • the actual application is related, for example, according to the distance between the terminal and the base station and the distance comparison between the base stations, and is not limited to the implementation of the solution of the present invention.
  • the same action means that the terminal performs the same behavior, for example, each terminal initiates a handover request.
  • the source base station can learn which terminals are the same type of terminal by measuring each terminal. Since the second group of terminals has more signaling interactions with the base station system, the source base station can select a group of terminals with strong selection signals or strong terminal capabilities as the second group of terminals, and of course, a group of terminals can be randomly selected. The end serves as the second group of terminals. Preferably, the source base station selects one terminal with the highest signal strength and the strongest terminal processing capability as the second group terminal.
  • the source base station sends measurement signaling to the first group of terminals and the second group of terminals according to the current service quality, and receives the returned measurement report, according to the first group of terminals and the first The status of the two groups of terminals determines whether to switch. Further, the second group of terminals is selected from the status of each terminal in the measurement report.
  • the handover request is for requesting the first group of terminals and the second group of terminals to switch from the source base station to a target base station.
  • the measurement result shows that the two groups of terminals meet the preset switching condition, and then determines that the first group terminal and the second group terminal switch, Sending a handover request to the target base station, requesting to switch the first group of terminals and the second group of terminals from the source base station to the target base station.
  • the handover request response information includes information about a random access resource allocated to the second group of terminals
  • the information about the random access resource allocated to the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals according to the random access resource information And acquiring uplink synchronization information and uplink resource allocation information to access the target base station.
  • the source base station sends the information of the random access resource allocated by the target base station to the second group of terminals to the second group of terminals and the first group of terminals, where the first group of terminals can be randomly connected by the random access resource
  • the random access response message sent by the target base station is monitored. Therefore, the uplink synchronization information and the uplink resource allocation information are further obtained according to the monitored random access response message to access the target base station.
  • the first group of terminals can obtain the following information by listening to the random access response message: a time advance command sent by the station system to the second group of terminals (English: Timing Advance Command, abbreviation: TAC), and uplink physical resources allocated by the base station system for the second group of terminals and the first group of terminals, and may be based on time
  • TAC Timing Advance Command
  • the uplink synchronization information and the uplink resource allocation information acquired in the TA (Timing Advance) and the random access response message obtained in the advance command are accessed to the target base station.
  • the second group of terminals needs to initiate random access on the corresponding random access resources, and the first group of terminals and the second group of terminals can listen to the corresponding random access response message in the random access response window.
  • a group of terminals and a second group of terminals can access the target base station according to the command of the monitored network side base station system.
  • the source base station divides the terminal of the same type into the first group terminal and the second group terminal, and when the measurement result of the terminal of the same type meets the preset switching condition, sending a request to the target base station
  • the terminal accesses the handover request of the target base station, and the handover request response information sent by the target base station that is received by the source base station only carries the information of the second group of terminal random access resources, and the information about the access resources allocated to the second group of terminals Sending to the first group of terminals and the second group of terminals, so that the first group of terminals acquires random access response information of the second group of terminals according to the random access resource, and monitors the second group by
  • the random access response message of the terminal acquires the same uplink synchronization information and uplink resource allocation information of the second group of terminals, and accesses the target base station, so that the handover is initiated simultaneously with all the terminals, because only the second group is The terminal initiates random access on the access channel, and the first group of terminal
  • another embodiment of the terminal accessing the base station system in the embodiment of the present invention includes:
  • the source base station divides the terminal of the same type into the first group terminal and the second group terminal.
  • the source base station divides the terminals of the same type into the first group terminal and the second group terminal.
  • the terminal of the same type refers to a terminal that is relatively close in position and has the same action.
  • the relatively close position means that the distance between the terminals is less than a preset distance value, and the specific setting of the preset distance value is
  • the actual application is related, for example, according to the distance between the terminal and the base station and the distance comparison between the base stations, and is not limited to the implementation of the solution of the present invention.
  • the same action means that the terminal performs the same behavior. For example, each terminal initiates a handover request.
  • the source base station can learn which terminals are the same type of terminal by measuring each terminal. E.g A group of terminals with strong selection signal strength or terminal capability can be selected as the second group terminal, and of course, a group of terminals can be randomly selected as the second group terminal. Preferably, the source base station selects one terminal with the highest signal strength and the strongest terminal processing capability as the second group terminal.
  • the source base station sends measurement signaling to the first group of terminals and the second group of terminals according to the current service quality, and receives the returned measurement report, according to the first group of terminals and the first The status of the two groups of terminals determines whether to switch. Further, the second group of terminals is selected from the status of each terminal in the measurement report.
  • the handover request is for requesting the first group of terminals and the second group of terminals to switch from the source base station to a target base station.
  • the measurement result shows that the two groups of terminals meet the preset switching condition, and then determines that the first group terminal and the second group terminal switch, Sending a handover request to the target base station, requesting to switch the first group of terminals and the second group of terminals from the source base station to the target base station.
  • the handover request response information carries information of a random access resource allocated to the second group of terminals.
  • the target base station determines that the first group of terminals and the second group of terminals are accessible, sending, to the source base station, handover request response information, where the target base station is randomly connected to the second group of terminals.
  • Information about resources
  • the information about the random access resource allocated to the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals acquires the information according to the information about the access resource.
  • the first group of terminals can obtain the following information by listening to the random access response message: a time advance command sent by the base station system to the second group terminal (English: Timing Advance Command, abbreviation: TAC), and the base station system is
  • TAC Timing Advance Command
  • the second group of terminals and the first group of terminals are allocated uplink resources, and can access the target base station according to the uplink resources acquired in the TA (Timing Advance) and the random access response message acquired in the time advance command.
  • the random access is initiated on the access resources of the device, and the first group of terminals and the second group of terminals can listen to the corresponding random access response message in the random access response window, and the first group of terminals and the second group of terminals can be configured according to The command of the monitored network side base station system accesses the target base station.
  • the source base station sends an RRC Connection Reconfiguration message carrying the handover command to the UE, where the RRC Connection Reconfiguration message carries the random access resource information of the UE at the target base station, including a random access channel (English: RandomAccessChannel, abbreviation: RACH) and a Preamble (preamble sequence) ) Information.
  • RACH RandomAccessChannel
  • Preamble sequence Preamble sequence
  • the source base station sends the information about the random access resource allocated by the target base station to the second group of terminals to the second group of terminals and the first group of terminals, where the first group of terminals can know the information of the random access resource.
  • the source base station allocates a random access channel and a preamble sequence to the second group of terminals.
  • the first group of terminals can listen to the random access response message sent by the target base station in the random access response window corresponding to the random access resource. Therefore, the uplink synchronization information and the uplink resource allocation information are obtained according to the monitored random access response message, and the target base station is accessed according to the uplink synchronization information and the uplink resource allocation information.
  • the handover request response information sent by the target base station may include information of a sounding reference signal (English: sounding reference signal, abbreviation: SRS) resource allocated by the target base station to the first group of terminals.
  • a sounding reference signal English: sounding reference signal, abbreviation: SRS
  • the source base station After receiving the handover request response information sent by the target base station, the source base station sends, to the first group of terminals, information about the SRS resource allocated by the target base station to the first group of terminals, where the first group of terminals may be Sending an SRS signal to the target base station on the SRS resource, the target base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals.
  • the target base station receives the access request initiated by the second group of terminals, send a random access response message to the first terminal and the second group of terminals, where the uplink resource allocation of the second group of terminals is included.
  • the information and the uplink synchronization information are such that the first group of terminals and the second group of terminals acquire the uplink resource allocation information and the uplink synchronization information.
  • the second group of terminals initiates an access request to the target base station, and sends the allocated Preamble on the allocated random access resource.
  • the target base station After receiving the corresponding Preamble, the target base station sends a random access response (English: Random Access Response, abbreviation: RAR) message, including the destination in the RAR message
  • RAR Random Access Response
  • the uplink base station allocates uplink resource allocation (English: Uplink allocation, abbreviation: UL allocation) information and uplink synchronization information, wherein the uplink synchronization information may be a timing advance (English: Timing Advance, abbreviation: TA).
  • the uplink synchronization information of the following embodiments is exemplified by TA.
  • the UL allocation information is used to indicate the resource location of the uplink data sent by the UE, and the TA is used for the UE to perform time adjustment on the transmitted data to reduce inter-symbol interference.
  • the first group of terminals may calculate the location of the RAR message sent by the target base station according to the received random access resource allocated to the second group of terminals, and listen to the RAR message, thereby obtaining the uplink resource allocation information and the TA, and thus may
  • the target base station transmits uplink data and transmits data to the target base station in advance according to the TA to reduce inter-symbol interference.
  • the RAR message sent by the target base station to the second group of terminals includes the uplink resource of the first group of terminals. Allocating information, the uplink resource allocation information of the second group of terminals, and the timing advance of the second group of terminals, so that the first group of terminals acquires the second group in the RAR message of the second group of terminals The timing advance of the terminal and the uplink resource allocation information of the first group of terminals.
  • the target base station when the target base station sends the uplink resource allocation information of the second group of terminals and the TA of the second group of terminals to the second group of terminals, the target base station may further send the uplink resource allocation of the first group of terminals to the first group of terminals.
  • the information and the TA of the second group of terminals so that the first group of terminals obtain the uplink resource allocation information of the first group of terminals and the time advance amount of the second group of terminals in the RAR message of the second group of terminals, and Accordingly, uplink data is transmitted to the target base station and data is transmitted to the target base station in advance according to the TA to reduce inter-symbol interference.
  • the TAs of the first group of terminals herein may be identical to the TAs of the second group of terminals, or may be obtained according to the TA correction of the second group of terminals, or may be omitted, but not obtained by the TA of the second group of terminals.
  • Uplink synchronization may be identical to the TAs of the second group of terminals, or may be obtained according to the TA correction of the second group of terminals, or may be omitted, but not obtained by the TA of the second group of terminals.
  • the first group of terminals sends information of the SRS resource to the target base station on the pre-assigned SRS resource, and the target base station may correct the TA according to the received SRS signal.
  • the UE After the UE successfully connects to the target base station, the UE sends an RRC Connection to the target base station.
  • the Reconfiguration Complete message is used to notify the target base station that the UE has completed the handover.
  • the second group of terminals initiates access to the target base station, and the target base station sends a random access response message to the first group of terminals and the second group of terminals, where the uplink resource allocation information and the uplink synchronization information are included, so that the The first group of terminals acquires the uplink resource allocation according to the random access response message Information and the uplink synchronization information, so that the first group of terminals can access and transmit data to the target base station according to the acquired second group of terminal uplink resource allocation information and uplink synchronization information, so as to implement handover from the source base station to the target base station,
  • the first group of terminals can obtain access signaling and resources by listening to access the target base station, thereby reducing The signaling interaction in the handover saves random access resources and improves the efficiency of the user simultaneously switching the base station.
  • the handover request response information sent by the target base station to the source base station may further include information about the SRS resources allocated by the target base station to the first group of terminals, so that the first group of terminals simultaneously acquires SRS resources, and is used for further Correct the TA to enhance the communication quality with the target base station.
  • the above is a method for accessing the base station system from the base station system side, that is, the terminal described from the network side.
  • the following describes the method for the terminal to access the base station system from the first group terminal side. Referring to FIG. 3, the terminal in the embodiment of the present invention is connected.
  • the method of entering the base station system includes:
  • the first group of terminals receives information about the random access resources of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminals as the first group of terminals.
  • External terminal
  • the source base station divides the terminal of the same type into the first group terminal and the second group terminal, where the first group terminal does not send a random access request to the source base station, and the second group terminal can The source base station sends a random access request.
  • the terminal of the same type refers to a terminal whose distance between the terminals is smaller than a preset distance value and the actions are the same.
  • the first group of terminals receives information about random access resources of the second group of terminals sent by the source base station.
  • the first group of terminals can listen to the random access response message sent by the target base station in the random access response window corresponding to the random access resource. Thereby, uplink synchronization information and uplink resource allocation information are obtained from the random access response message.
  • the source base station divides the terminals of the same type into the first group terminal and the second group terminal.
  • the second group of terminals sends a random access request to the source base station, and the first group of terminals does not send a random access request to the source base station, and the target base station sent by the source base station is the random access resource allocated by the second group of terminals.
  • the base station does not need to send a random access request to the base station system, and the base station system only sends the access signaling and the allocated access resources to the second group of terminals, and the first group of terminals can listen to the access information by using the information of the random access resources.
  • the access and the access resources can access the target base station, which can reduce the signaling interaction in the handover and save random access resources. Improve the efficiency of users switching base stations at the same time.
  • a method for the terminal accessing the base station system is described in detail in another embodiment.
  • another embodiment of the method for the terminal to access the base station system in the embodiment of the present invention includes:
  • the first group of terminals receives information about random access resources of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals.
  • External terminal
  • the source base station divides the terminal of the same type into the first group terminal and the second group terminal, where the first group terminal does not send a random access request to the source base station, and the second group terminal can The source base station sends a random access request.
  • the terminal of the same type refers to a terminal whose distance between the terminals is smaller than a preset distance value and the actions are the same.
  • the source base station sends the information about the random access resource allocated by the target base station to the second group of terminals to the second group of terminals and the first group of terminals, where the first group of terminals can know the information of the random access resource.
  • the source base station allocates a random access channel and a preamble sequence to the second group of terminals.
  • the first group of terminals may listen to the random access response message sent by the target base station in the random access response window corresponding to the random access resource. Therefore, the uplink synchronization information is further obtained according to the monitored random access response message.
  • the first group of terminals can obtain the following information by using a random access response message: a time advance command sent by the base station system to the second group terminal (English: Timing Advance Command, abbreviated as TAC), and the base station system is the second The uplink resource allocated by the group terminal and the first group of terminals, and the TA resource obtained by the TA in the random access response message is acquired in the TAC, and the target base station is accessed according to the TA and the acquired uplink resource.
  • TAC Timing Advance Command
  • the second group of terminals sends an access request to the target base station, and the allocated Preamble is sent on the allocated random access resource.
  • the target base station After receiving the corresponding Preamble, the target base station sends an RAR message, where the target base station is included in the RAR message.
  • the UL allocation information and the TA allocated by the group terminal are used to indicate the resource location of the uplink data sent by the UE, and the TA is used for the UE to adjust the time of transmitting the data to reduce inter-symbol interference.
  • the first group of terminals may calculate the location of the RAR message sent by the target base station according to the received random access resource allocated to the second group of terminals, and listen to the RAR message, thereby obtaining the uplink resource allocation information and the TA, and thus may
  • the target base station transmits uplink data and transmits data to the target base station in advance according to the TA to reduce inter-symbol interference.
  • the RAR message sent by the target base station to the second group of terminals includes the uplink resource of the first group of terminals. Allocating information, the uplink resource allocation information of the second group of terminals, and the timing advance of the second group of terminals, so that the first group of terminals acquires the second group in the RAR message of the second group of terminals The timing advance of the terminal and the uplink resource allocation information of the first group of terminals.
  • the target base station when the target base station sends the uplink resource allocation information of the second group of terminals and the TA of the second group of terminals to the second group of terminals, the target base station may further send the uplink resource allocation of the first group of terminals to the first group of terminals.
  • the information and the TA of the second group of terminals so that the first group of terminals obtain the uplink resource allocation information of the first group of terminals and the time advance amount of the second group of terminals in the RAR message of the second group of terminals, and Accordingly, uplink data is transmitted to the target base station and data is transmitted to the target base station in advance according to the TA to reduce inter-symbol interference.
  • the TAs of the first group of terminals may be identical to the TAs of the second group of terminals, or may be obtained according to the TA correction of the second group of terminals, or may be omitted, but not according to the TA of the second group of terminals. Get upstream synchronization.
  • the first group of terminals receives information about the SRS resources allocated by the target base station to the first group of terminals, and the first group of terminals may send an SRS signal to the target base station on the SRS resource, the target The base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals.
  • the first group of terminals listen to the access response message of the second group of terminals, and obtain uplink synchronization information of the second group of terminals and
  • the uplink resource allocation information is used to access the base station, and the handover is initiated simultaneously with all the terminals. Since the base station system only sends signaling on the access channel of the second group of terminals, the first group of terminals are monitored on the access channel. The access signaling and the resource can be obtained, and the target base station can be accessed synchronously with the second group of terminals, which can reduce the signaling interaction in the handover, save the random access resources, and improve the efficiency of the user simultaneously switching the base station.
  • the first group of terminals can calculate the location of the RAR message sent by the target base station according to the received random access resource allocated to the second group of terminals, and listen to the RAR message, thereby obtaining the uplink resource allocation information and the TA,
  • the uplink data may be sent to the target base station, and the data may be sent to the target base station in advance according to the TA to reduce inter-symbol interference.
  • the first group of terminals receives the SRS resource allocated by the target base station to the first group of terminals.
  • the first group of terminals may send an SRS signal to the target base station on the SRS resource, and the target base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals to enhance communication quality with the target base station.
  • the source base station sends the group information to the second group terminal.
  • This step can also be performed after 502.
  • the source base station sends measurement control information Measurement Configuration to the first group of terminals and the second group of terminals, and notifies the UE to perform measurement and report the measurement result.
  • the first group of terminals and the second group of terminals send a measurement report to the source base station. 504. Determine a handover.
  • the source base station makes a handover decision.
  • the source base station sends a handover request to the target base station, requesting the first group of terminals and the second group of terminals to switch to the target base station.
  • the target base station determines that the first group of terminals and the second group of terminals can be handed over to the target base station.
  • the target base station sends a handover request ACK, which is an answer to the handover request sent by the source base station, indicating that the target base station is ready to perform handover.
  • the information of the random access channel is carried in the handover request response information.
  • the handover request response information may also carry the target base station to be allocated to the first group of terminals.
  • the information of the SRS resource is used for the first group of terminal correction TA.
  • the source base station sends an RRC Connection Reconfiguration message carrying a handover command to the first group of terminals and the second group of terminals, where the RRC Connection Reconfiguration message carries the random access resource information of the UE at the target base station.
  • the information about the SRS resource allocated by the target base station to the first group of terminals sent by the source base station may also be sent, so that the target base station corrects the TA of the first group of terminals.
  • the target base station sends the RAR message to the first group of terminals, where the uplink resource allocation information and the time advancement amount of the second group of terminals are included, and the uplink resource allocation information of the first group and the second group of terminals and the second group may also be included.
  • the amount of time advancement of the terminal is included, and the uplink resource allocation information of the first group and the second group of terminals and the second group may also be included.
  • the information about the SRS resources allocated by the target base station to the first group of terminals may be sent in this step, and used to modify the TA of the first group of terminals.
  • the information of the SRS resource allocated by the target base station to the first group of terminals may be monitored for modifying the TA.
  • the base station system in this embodiment includes:
  • the source base station 601 is configured to divide the terminal of the same type into the first group terminal and the second group terminal;
  • handover request response information includes information of a random access resource allocated to the second group of terminals
  • the information acquires uplink synchronization information and uplink resource allocation information to access the target base station.
  • the target base station 602 is configured to: if receiving an access request initiated by the second group of terminals, send a random access response message to the first group of terminals and the second group of terminals, where the random access
  • the response message includes the uplink resource allocation information and the uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals acquire the uplink resource allocation information and the uplink synchronization information.
  • the target base station 602 is further configured to: if receiving an access request initiated by the second group of terminals, send a random access response message to the first group of terminals and the second group of terminals, where The random access response message includes the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the uplink synchronization information of the second group of terminals, so that the first group of terminals acquires the The uplink resource allocation information of the first group of terminals and the uplink synchronization information of the second group of terminals, the second group of terminals acquiring the uplink resource allocation information of the second group of terminals and the uplink synchronization information of the second group of terminals .
  • the handover request response information further includes information of the sounding reference signal resource allocated by the target base station 602 for the first group of terminals;
  • the source base station 601 is further configured to send information of the sounding reference signal resource allocated by the target base station 602 to the first group of terminals to the first group of terminals, where the first group of terminals are in the detecting Sending a sounding reference signal to the target base station on the reference signal resource, such that the target base station 602 And correcting uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • the source base station 601 divides the terminals of the same type into the first group of terminals and the second group of terminals.
  • the request is sent to the target base station 602.
  • the terminal accesses the handover request of the target base station, and the handover request response information sent by the target base station received by the source base station 601 carries only the information of the second group of terminal random access resources, and is allocated to the access resources of the second group of terminals.
  • the information is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains random access response information of the second group of terminals according to the random access resource, and monitors the second
  • the random access response message of the group terminal acquires the same uplink synchronization information and uplink resource allocation information of the second group of terminals, and accesses the target base station according to the uplink synchronization information and the uplink resource allocation information, so that, simultaneously with all the terminals,
  • the first group of terminals monitors The corresponding random access response message to obtain the access signaling and resources to achieve the target base station 602 and access, handover signaling interaction can be reduced, saving the random access resources and improve efficiency of the user while switching the base station.
  • the target base station 602 sends a random access response message to the second group of terminals, where the uplink resource allocation information and the uplink synchronization information are included, so that the first group of terminals listens for the acquisition. Up to the uplink resource allocation information and the uplink synchronization information, so that the first group of terminals can access the target base station 602 according to the acquired second group of terminal uplink resource allocation information and uplink synchronization information, and send data to the source station 602 to implement the source
  • the base station 601 switches to the target base station 602.
  • the base station system only sends the signaling to the second group of terminals, the first group of terminals can obtain the access signaling and resources by monitoring.
  • the target base station 602 is accessed, so that the signaling interaction in the handover can be reduced, the random access resources are saved, and the efficiency of the user simultaneously switching the base station is improved. Further, the handover request response information sent by the target base station 602 to the source base station 601 may further include information about the SRS resources allocated by the target base station 602 for the first group of terminals, so that the first group of terminals simultaneously acquire SRS resources, and used for The TA is further modified to enhance the communication quality with the target base station 602.
  • an embodiment of the base station in this embodiment includes:
  • a grouping unit 701 configured to source, by the source base station, the terminal of the same type into the first group terminal and the second group terminal;
  • the sending unit 702 is configured to: when the measurement result of the terminal of the same type meets the preset switching condition, send a handover request to the target base station, where the handover request is used to request the first group of terminals and the second group The terminal switches from the source base station to the target base station;
  • the receiving unit 703 is configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals;
  • the sending unit 702 is further configured to send the information about the random access resource allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first The group terminal acquires uplink synchronization information and uplink resource allocation information according to the information of the random access resource to access the target base station.
  • the sending unit 702 is further configured to send, to the first group of terminals, information about the sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals are in the detecting
  • the sounding reference signal is sent to the target base station on the reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • the grouping unit 701 of the source base station divides the terminals of the same type into the first group terminal and the second group terminal.
  • the sending unit 702 sends The target base station sends a handover request requesting the terminal to access the target base station, and the handover request response information sent by the target base station received by the receiving unit 703 carries only the information of the second group of terminal random access resources, and the sending unit 702 allocates the information to the The information about the access resources of the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains the random access response information of the second group of terminals according to the random access resource.
  • the first group of terminals can obtain access signaling and resources by listening to the corresponding random access response message, and the access target base station can reduce the signaling interaction in the handover, save random access resources, and improve users simultaneously. Switch the efficiency of the base station.
  • the sending unit 702 sends, to the first group of terminals, information of the sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals is detecting
  • the sounding reference signal is sent to the target base station on the reference signal resource, so that the target base station corrects the uplink synchronization information of the first group of terminals according to the received sounding reference signal, and enhances the communication quality between the first terminal and the target base station.
  • another embodiment of the base station in this embodiment includes:
  • the processor 801 is configured to: the source base station divides the terminal of the same type into the first group terminal and the second group terminal;
  • the transmitter 802 is configured to: when a measurement result of the terminal of the same type meets a preset handover condition, send a handover request to the target base station, where the handover request is used to request the first group of terminals and a Translating, by the second group of terminals, the source base station to the target base station;
  • the receiver 803 is configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals; 802.
  • the 802 is further configured to send the information about the random access resource that is allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group of terminals according to the The information about the random access resource acquires uplink synchronization information and uplink resource allocation information to access the target base station.
  • the transmitter 802 is further configured to send, to the first group of terminals, information of sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals is located at the first group of terminals. Sending a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.
  • an embodiment of a terminal in the embodiment of the present invention includes:
  • the receiving information unit 901 is configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals. a terminal other than the first group of terminals;
  • the obtaining information unit 902 is configured to listen to the access response message of the second group of terminals according to the information about the random access resources of the second group of terminals received by the receiving information unit 901, and acquire the access response.
  • the source base station divides the terminal of the same type into the first group terminal and the second group terminal, wherein only the second group terminal sends a random access request to the source base station, and the first group terminal does not send the source terminal to the source base station.
  • the receiving information unit 901 receives the information of the random access resource allocated by the target base station to the second group of terminals, and the acquiring information unit 902 passes the information of the random access resource of the second group of terminals.
  • the ingress unit 903 accesses the target base station by using the uplink synchronization information and the uplink resource allocation information, so that the first group of base stations does not need to send a random access request to the base station system, but the base station system Only the second group of terminals sends access signaling and allocates access resources, and the first group of terminals can pass Information monitor the random access resources and access resources of the access signaling, can access the target base station, handover signaling interaction can be reduced, saving the random access resources and improve efficiency of the user while switching the base station.
  • another embodiment of the terminal in the embodiment of the present invention includes:
  • a receiving information unit 1001 configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals a terminal other than the first group of terminals;
  • the obtaining information unit 1002 is configured to listen to the access response message of the second group of terminals according to the information about the random access resources of the second group of terminals received by the receiving information unit 1001, and acquire the access response The uplink synchronization information and the uplink resource allocation information of the second group of terminals in the message; the access unit 1003, configured to access the target according to the uplink synchronization information and the uplink resource allocation information acquired by the acquiring information unit 1002 Base station.
  • the receiving information unit 1001 is further configured to receive a random access response message sent by the target base station;
  • the acquiring information unit 1002 is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message;
  • the access unit 1003 is further configured to access the target base station according to uplink resource allocation information and uplink synchronization information of the second group of terminals. Further, the receiving information unit 1001 is further configured to receive a random access response message sent by the target base station;
  • the acquiring information unit 1002 is further configured to acquire uplink resource allocation information, the second, of the first group of terminals that are sent by the target base station to the second group of terminals included in the random access response message. Uplink resource allocation information of the group terminal and uplink synchronization information of the second group of terminals;
  • the access unit 1003 is further configured to access the target base station according to uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals;
  • the receiving information unit 1001 is further configured to receive information about the sounding reference signal resource allocated by the target base station to the first group of terminals.
  • the terminal may further include:
  • the sending signal unit 1004 is configured to send, by using the sounding reference signal resource, a sounding reference signal to the target base station, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal. .
  • the receiving information unit 1001 receives the random access response message sent by the target base station, and the acquiring information unit 1002 obtains the uplink resource allocation information of the second group of terminals included in the random access response message.
  • the uplink synchronization information, the access unit 1003 accesses the target base station according to the uplink resource allocation information and the uplink synchronization information of the second group of terminals, and therefore may send uplink data to the target base station and send data to the target base station according to the TA advance to reduce the code interval.
  • the receiving information unit 1001 receives the information of the SRS resource allocated by the target base station to the first group of terminals, and the first group of terminals may send an SRS signal to the target base station on the SRS resource, the target.
  • the base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals to enhance communication quality with the target base station.
  • another embodiment of the terminal in the embodiment of the present invention includes:
  • the receiver 1102 is configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type as the first group of terminals. a terminal other than the first group of terminals in the terminal;
  • the processor 1101 is configured to: according to the information about the random access resources of the second group of terminals received by the receiving information unit, listen to an access response message of the second group of terminals, and obtain the access response. Uplink synchronization information and uplink resource allocation information of the second group of terminals in the message;
  • the processor 1101 is further configured to access the target base station according to the uplink synchronization information and uplink resource allocation information acquired by the acquiring unit information.
  • the receiver 1102 is further configured to receive a random access response message sent by the target base station, and receive a sounding reference signal resource allocated by the target base station to the first group of terminals by the source base station.
  • Information ;
  • the processor 1101 is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message, and acquire the information included in the random access response message. Uplink resource allocation information of the first group of terminals, uplink resource allocation information of the second group of terminals, and uplink synchronization information of the second group of terminals sent by the target base station to the second group of terminals;
  • the processor 1101 is further configured to access the target base station according to the uplink resource allocation information and the uplink synchronization information of the second group of terminals, and the uplink resource allocation information according to the first group of terminals and the The uplink synchronization information of the second group of terminals accesses the target base station;
  • the transmitter 1103 is configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization of the first group of terminals according to the received sounding reference signal. information.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, the above mentioned storage medium. It can be a read-only memory, a disk or a disc, and the like.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Le mode de réalisation de la présente invention concerne un procédé, un appareil, et un système permettant à des terminaux d'accéder à un système de nœud B évolué pour améliorer l'efficacité d'accès des terminaux. Le procédé décrit dans le mode de réalisation de la présente invention comprend un nœud B évolué source qui : divise le même type de terminaux en un premier groupe de terminaux et un second groupe de terminaux ; quand le résultat de mesurage des terminaux du même type répond à une condition de commutation prédéfinie, envoie à un nœud B évolué cible une demande de commutation pour que le premier groupe de terminaux et le second groupe de terminaux soient commutés du nœud B évolué source au nœud B évolué cible ; reçoit des informations de réponse à la demande de commutation envoyées par le nœud B évolué cible, les informations de réponse à la demande de commutation contenant des informations sur une ressource d'accès aléatoire attribuée au second groupe de terminaux ; envoie les informations sur la ressource d'accès aléatoire au premier groupe de terminaux et au second groupe de terminaux pour que le premier groupe de terminaux obtienne des informations de synchronisation en liaison montante et des informations d'attribution de ressources en liaison montante d'après les informations sur la ressource d'accès aléatoire, de sorte à accéder au nœud B évolué cible.
PCT/CN2013/083300 2013-09-11 2013-09-11 Procédé, appareil, et système permettant à des terminaux d'accéder à un système de nœud b évolué WO2015035567A1 (fr)

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CN201380002255.5A CN104662963B (zh) 2013-09-11 2013-09-11 一种终端接入基站系统的方法、装置及系统

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CN109587746A (zh) * 2017-09-29 2019-04-05 日本电气株式会社 与无线接入网络相关的设备和方法

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