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WO2014067475A1 - Procédé et dispositif de transmission de données de liaison montante dans une agrégation de porteuses - Google Patents

Procédé et dispositif de transmission de données de liaison montante dans une agrégation de porteuses Download PDF

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Publication number
WO2014067475A1
WO2014067475A1 PCT/CN2013/086361 CN2013086361W WO2014067475A1 WO 2014067475 A1 WO2014067475 A1 WO 2014067475A1 CN 2013086361 W CN2013086361 W CN 2013086361W WO 2014067475 A1 WO2014067475 A1 WO 2014067475A1
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WO
WIPO (PCT)
Prior art keywords
base station
preamble sequence
user equipment
information
rar message
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/086361
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English (en)
Chinese (zh)
Inventor
常俊仁
黄曲芳
曾清海
李亚娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2014067475A1 publication Critical patent/WO2014067475A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information

Definitions

  • the present invention belongs to the field of communications, and in particular, to a method and an apparatus for transmitting uplink data in carrier aggregation. Background technique
  • CA Carrier Aggregation
  • the user equipment can use multiple component carriers (CC) for uplink and downlink communication. Supports high-speed data transmission. When the user rate is reduced, some component carriers can be released, and only one resident carrier is reserved, so that the released transmission resources can be used by other users, thereby achieving flexible and dynamic transmission purposes.
  • the intra-station carrier aggregation two kinds of base stations are generally used: a macro base station and a small base station, and the macro base station mainly uses a low frequency band component carrier for wide coverage, so as to perform mobility management and connection control well.
  • the small base station mainly uses the high frequency band to form a carrier, and its characteristics are mainly rich in resources, and can allocate a large bandwidth for data transmission, for example, a carrier of 3.5 GHz or 6 GHz, which can provide a high rate data service for the UE.
  • optical fiber, DSL (Digital Subscriber Line), and other methods are generally used for connection, so that the widely covered macro base station and the small coverage small base station perform mutual mutual Communication.
  • the transmission delay between the two is approximately 0, and when the macro base station and the small base station are connected to each other through an optical fiber or indirectly through an optical fiber,
  • the transmission delay is generally not negligible and can generally be assumed to be 10-20ms.
  • the prior art proposes a method for acquiring an uplink timing advance, the steps of which are mainly as follows:
  • the user equipment acquires a preamble sequence
  • the user equipment sends the obtained preamble sequence to the base station;
  • the base station sends a RAR (Random Access Response) message to the user, where the RAR message includes an uplink timing advance calculated by the base station and the preamble sequence identification information;
  • RAR Random Access Response
  • the uplink data transmission is performed by using the uplink timing advance in the RAR message.
  • the base station is as described above: the macro base station and the small base station
  • the delay between the macro base station and the small base station is greater than 10 ms
  • the receiving window of the RAR message is less than 10 ms
  • the user equipment may appear before the base station starts to send the RAR message.
  • the receiving window of the RAR message has been exceeded, and the user equipment is never able to receive the RAR message.
  • the purpose of the embodiments of the present invention is to provide a method and an apparatus for transmitting uplink data in carrier aggregation, so as to solve the problem that the RAW information cannot be received in the prior art.
  • the embodiment of the present invention is implemented by the method for transmitting uplink data in carrier aggregation, where the method includes:
  • the base station includes: a first base station or a second base station, where the secondary cell is located in the first Two base stations;
  • the RAW information including the uplink timing advance amount, where the uplink timing advance amount is obtained by the base station according to the preamble sequence calculation; according to the received RAR message
  • the uplink timing advance is performed, and uplink data transmission is performed by the secondary cell.
  • Another embodiment of the present invention further provides a method for transmitting uplink data in carrier aggregation, where the method includes: Sending, to the user equipment, information for the user equipment to receive the random access response message, and sending, to the user equipment, a synchronization indication message, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell,
  • the secondary cell is located at the second base station;
  • Another embodiment of the present invention further provides a method for transmitting uplink data in carrier aggregation, where the method includes:
  • An embodiment of the present invention provides a device for transmitting uplink data in carrier aggregation, where the device includes:
  • An information acquiring unit configured to acquire information used to receive a random access response message
  • a synchronization indication message receiving unit configured to: after the information acquiring unit acquires the information, receive a synchronization indication message sent by the base station, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell, where the base station
  • the method includes: a first base station or a second base station;
  • a preamble sequence sending unit configured to send, by the secondary cell, a preamble sequence to the second base station after the synchronization indication message receiving unit receives the synchronization indication message;
  • an RAR message receiving unit configured to receive, according to the information used by the information acquiring unit, the RAW information, the RAR message that includes the uplink timing advance, where the uplink timing advance is a preamble sent by the base station according to the preamble sending unit. Sequence calculation obtained;
  • an uplink data transmission unit configured to perform uplink data transmission by using the secondary cell according to an uplink timing advance in the RAR message received by the RAW information receiving unit.
  • Another embodiment of the present invention further provides an apparatus for transmitting uplink data in carrier aggregation, where the apparatus includes:
  • An information sending unit configured to send, to the user equipment, the user equipment to receive a random access response Information of the message
  • a synchronization indication message sending unit configured to send a synchronization indication message to the user equipment after the information sending unit sends the information, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell;
  • a preamble sequence receiving unit configured by the user equipment, by using a preamble sequence sent by the secondary cell indicated by the synchronization indication message sending unit;
  • a sending unit configured to send, to the first base station, a preamble sequence received by the preamble sequence receiving unit or an uplink timing advance amount calculated according to the preamble sequence.
  • Another embodiment of the present invention further provides an apparatus for transmitting uplink data in carrier aggregation, where the apparatus includes:
  • An information sending unit configured to send, to the user equipment, information for the user equipment to receive a random access response message
  • a synchronization indication message sending unit configured to send a synchronization indication message to the user equipment after the information sending unit sends the information, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell;
  • a receiving unit configured to receive a preamble sequence or an uplink timing advance sent by the second base station after the synchronization indication message sending unit sends the message
  • a RAW information sending unit configured to generate, according to the preamble sequence or the uplink timing advance quantity received by the receiving unit, an RAR message that includes the uplink timing advance quantity, and send the RAR message to the user equipment by using a primary cell, where The primary cell is located at the first base station.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • FIG. 1 is a flowchart of a method for transmitting uplink data in carrier aggregation according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for transmitting uplink data in carrier aggregation according to another embodiment of the present invention
  • FIG. 3 is another embodiment of the present invention
  • FIG. 4 is a flowchart of a method for transmitting uplink data in carrier aggregation according to another embodiment of the present invention
  • FIG. 5 is a schematic diagram of uplink in carrier aggregation according to an embodiment of the present invention
  • FIG. 6 is a structural diagram of an uplink data transmission apparatus in carrier aggregation according to another embodiment of the present invention
  • FIG. 7 is a structural diagram of an uplink data transmission apparatus in carrier aggregation according to an embodiment of the present invention
  • 8 is a structural diagram of a user equipment provided by an embodiment of the present invention
  • FIG. 9 is a structural diagram of a second base station according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of a first base station according to an embodiment of the present invention. detailed description
  • Embodiment 1 In order to explain the technical solutions of the present invention, the following description will be made by way of specific embodiments. Embodiment 1
  • FIG. 1 is a flowchart of a method for transmitting uplink data in carrier aggregation according to an embodiment of the present disclosure, where the method includes the following steps:
  • step S101 the user equipment acquires information for the user equipment to acquire a random access response message.
  • the user equipment obtains information about the random access response (RAR) message obtained by the user equipment from the network side, and the information may be used as a basis for the user equipment to obtain the RAW information.
  • Information includes:
  • the base station includes: a first base station and/or a second base station; or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the listening lag time is the time delayed or extended by the user equipment when listening to the RAR message.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2;
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • step S102 the base station sends a synchronization indication message to the user equipment, where the synchronization refers to The message is used to indicate that the user equipment performs random access on the secondary cell, and the base station includes: a first base station or a second base station.
  • the base station sends a synchronization indication message indicating that the user equipment performs random access on the secondary cell located in the second base station, so that the user equipment receives the first base station sends in a subsequent step.
  • RAW information and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • step S103 the user equipment sends a preamble sequence to the second base station by using the secondary cell.
  • the user equipment receives the synchronization indication message sent by the base station, accesses the secondary cell of the second base station according to the indication of the synchronization indication message, and sends a preamble sequence to the second base station by using the secondary cell.
  • the preamble sequence includes:
  • step S104 the second base station receives the preamble sequence, and sends the preamble sequence or the uplink timing advance calculated according to the preamble sequence to the first base station (Timing Advance)
  • the second base station after receiving the preamble sequence sent by the user equipment, the second base station sends the preamble sequence to the first base station, or calculates an uplink timing advance amount according to the preamble sequence, and the uplink is performed.
  • the timing advance is sent to the first base station, and the method for calculating the uplink timing advance according to the preamble sequence is prior art, and details are not described herein.
  • the definition of the timing advance can be referred to the prior art, which is usually the time required by the user equipment to send a signal to the base station to compensate for the delay of the transmission.
  • step S105 the first base station receives a preamble sequence or an uplink timing advance sent by the second base station, and generates an RAR message including an uplink timing advance according to the preamble sequence or the uplink timing advance amount, and passes the primary cell to the location.
  • the user equipment sends the RAW information.
  • the first base station after receiving the preamble sequence sent by the second base station, calculates an uplink timing advance according to the preamble sequence, and generates an RAR including the uplink timing advance amount.
  • the message, or the first base station generates a RAR message according to the received uplink timing advance.
  • the first base station sends the RAW message to the user equipment by using the primary cell. It should be noted that the RAR message may only include the uplink timing advance and the preamble sequence.
  • step S106 the user equipment receives the RAR message according to the obtained information for acquiring an RAR message.
  • the user equipment receives the RAR message including the uplink timing advance according to the acquired information. among them:
  • the user equipment receives the RAR message according to the obtained delay information of the first base station and the second base station, and includes:
  • n is a non-negative integer preset value
  • the user equipment When there is a backhaul link delay between the first base station and the second base station, the user equipment detects and acquires the RAW information or the slave station from the secondary cell starting from the n subframe times after the sending of the preamble sequence Starting at the k+n subframe time after the preamble sequence, detecting, and receiving, the RAR message from the primary cell, where k, n are preset times for the user equipment, in a case and a subsequent embodiment. , k is a non-negative integer preset; or,
  • the user equipment When the backhaul link delay time between the first base station and the second base station is T, the user equipment starts from T+n subframe times or ⁇ subframe time after transmitting the preamble sequence, from the primary cell. Detecting and receiving the RAR message; or
  • the user equipment detects and receives the RAR message from the secondary cell starting from the n subframe times after the sending of the preamble sequence. Or, the RAR message is detected and received from the primary cell, where the ⁇ is the preset number of subframes of the user terminal, that is, the user equipment, starting from the first subframe after the sending of the preamble sequence, ⁇ can be equal to T1; or
  • ⁇ is a preset value, where ⁇ can be equal to ⁇ 2.
  • the user equipment receives the RAR message according to the acquired end information of the obtained RAR message include:
  • the user equipment detects and receives the RAR message from the primary cell;
  • the user equipment detects and receives the RAR message from the secondary cell of the sending preamble sequence;
  • the secondary cell transmitting the preamble sequence When the secondary cell transmitting the preamble sequence performs blind detection of the common search space, the RAW information is detected and received from the secondary cell transmitting the preamble sequence.
  • the user equipment receives the RAR message according to the obtained path loss information of the primary cell and the secondary cell, including:
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is less than N, the user equipment receives the RAR message from the primary cell, where the N is a path preset by the user equipment. Poor loss; or,
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is greater than or equal to N, the user equipment receives the RAR message from the secondary cell, where the N is preset by the user equipment. Poor path loss.
  • the method for receiving the RAR message according to the obtained monitoring delay time information configured by the first base station or the second base station for the user equipment including:
  • the user equipment detects and receives the RAR message from the primary cell, starting from T3+n subframe times after sending the preamble sequence or starting from T3 subframes, according to the acquired monitoring lag time T3, where ⁇ is the default value.
  • step S107 the user equipment performs uplink data transmission by using the secondary cell according to the uplink timing advance amount in the received RAR message.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • the method further includes the following steps:
  • the first base station manages a preamble sequence of the second base station, where the preamble sequence is a second base station To use the leader sequence.
  • the preamble sequence of the second base station is controlled by the first base station, because the first base station needs to ensure that the dedicated preamble sequence allocated for each user equipment is unique, and the dedicated preamble sequence received by the user equipment may be
  • the first base station needs to manage the preamble sequence of the second base station, and the specific management method includes:
  • the first base station allocates a preamble sequence to the second base station;
  • the second base station Before the second base station allocates a preamble sequence to the user equipment, the second base station requests the first base station to allocate a preamble sequence for the user equipment;
  • the first base station allocates a preamble sequence to the user equipment, and sends the allocated preamble sequence to the second base station. .
  • the method further includes the following steps: the second base station needs to change the preamble sequence, and the second base station is to the A base station sends a request to add or release a preamble sequence;
  • the first base station processes the request, and sends the processing to the second base station, where the processing includes: information about a preamble sequence added or released by the first base station to the second base station according to the request. .
  • the method further includes the following steps:
  • the second base station periodically reports the usage rate of the preamble sequence to the first base station; or, when the usage rate of the preamble sequence is higher or lower than a preset preamble sequence usage threshold, the The second base station reports the usage rate of the preamble sequence to the first base station.
  • FIG. 2 is a flow chart of a method for transmitting uplink data in carrier aggregation according to another embodiment of the present invention, where the method includes:
  • step S201 information for receiving a random access response message is obtained.
  • the user equipment obtains information about the random access response (RAR) message obtained by the user equipment from the network side by using multiple methods, where the information includes: a delay information between a base station and a second base station, where the base station includes: a first base station and/or a second base station; or The acquiring end information of the RAR message sent by the base station to the user equipment; or the path loss information of the primary cell acquired by the user equipment and the secondary cell that is or is about to perform random access; or
  • RAR random access response
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • step S202 the synchronization indication message sent by the base station is received, where the synchronization indication message is used to refer to The user equipment is shown to perform random access on a secondary cell, where the base station includes: a first base station or a second base station.
  • the user equipment receives a synchronization indication message that is sent by the base station to indicate that the user equipment performs random access on the secondary cell of the second base station, so that the user equipment receives the RAR message sent by the first base station in the following.
  • the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • step S203 a preamble sequence is sent to the second base station by the secondary cell.
  • the user equipment receives the synchronization indication message sent by the base station, accesses the secondary cell of the second base station according to the indication of the synchronization indication message, and sends a preamble sequence to the second base station by using the secondary cell.
  • the preamble sequence includes:
  • step S204 the RAW information including the uplink timing advance is received according to the obtained information for receiving the RAR message, and the uplink timing advance is obtained by the base station according to the preamble sequence calculation.
  • the user equipment receives the RAR message including the uplink timing advance according to the acquired information. among them:
  • the user equipment receives the RAR message according to the obtained delay information of the first base station and the second base station, and includes:
  • the user equipment When there is no backhaul link delay time between the first base station and the second base station, the user equipment detects and receives the RAR message from the primary cell starting from n subframe times after sending the preamble sequence, n is the default value; or,
  • the user equipment When there is a backhaul link delay between the first base station and the second base station, the user equipment detects and acquires the RAW information or the slave station from the secondary cell starting from the n subframe times after the sending of the preamble sequence Starting at the k+n subframe time after the preamble sequence, detecting, and receiving, the RAR message from the primary cell, where k, n is a time preset for the user equipment; or
  • the backhaul link delay time between the first base station and the second base station is T
  • the user equipment starts from T+n subframe times or ⁇ subframe time after transmitting the preamble sequence, from the primary cell. Detecting and receiving the RAW information; or
  • the user equipment detects and receives the RAR message from the secondary cell starting from n subframe times after sending the preamble sequence. Or, starting from the M subframes after the sending of the preamble sequence, detecting, and receiving, by the primary cell, the RAR message, where M is a preset number of subframes of the user terminal, and M may be equal to T1; or
  • n is the default value, where n can be equal to T2.
  • the user equipment receives the RAR message according to the acquired end information of the obtained RAR message, and includes:
  • the user equipment detects and receives the RAR message from the primary cell;
  • the user equipment detects and receives the RAW information from the secondary area of the sending preamble sequence;
  • the secondary cell transmitting the preamble sequence When the secondary cell transmitting the preamble sequence performs blind detection of the common search space, the RAW information is detected and received from the secondary cell transmitting the preamble sequence.
  • the user equipment receives the RAR message according to the obtained path loss information of the primary cell and the secondary cell, including:
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is less than N, the user equipment receives the RAR message from the primary cell, where the N is a path preset by the user equipment. Poor loss; or,
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is greater than or equal to N, the user equipment receives the RAR message from the secondary cell, where the N is preset by the user equipment. Poor path loss.
  • the method for receiving the RAR message according to the obtained monitoring delay time information configured by the first base station or the second base station for the user equipment including: According to the acquired monitoring lag time T3, the user equipment detects and receives the RAR message from the primary cell starting from ⁇ 3+n subframe times after transmitting the preamble sequence or starting from ⁇ 3 subframes, where ⁇ is the default value.
  • step S205 uplink data transmission is performed by the secondary cell according to the received uplink timing advance in the RAR message.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • FIG. 3 is a flowchart of a method for transmitting uplink data in carrier aggregation according to another embodiment of the present invention, where the method includes the following steps:
  • step S301 information for the user equipment to receive the random access response message is sent to the user equipment.
  • the second base station sends, to the user equipment, information for the user equipment to obtain a random access response (RAR) message, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including: There is no backhaul delay between the first base station and the second base station; or there is a backhaul link delay between the first base station and the second base station, but the specific delay time is unknown; or
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • step S302 a synchronization indication message is sent to the user equipment, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell.
  • the second base station sends, to the user equipment, a synchronization indication message indicating that the user equipment performs random access in the secondary cell located in the second base station, so that the user equipment receives the first base station to send in a subsequent step.
  • the RAW information, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • step S303 a preamble sequence sent by the user equipment by using the secondary cell is received.
  • the second base station receives the preamble ⁇ ij sent by the user equipment by using the secondary cell, and the preamble sequence includes: a preamble sequence allocated by the first base station or the second base station to the user equipment; or
  • step S304 the received preamble sequence or the uplink timing advance amount calculated according to the preamble sequence is transmitted to the first base station.
  • the second base station may directly send the preamble sequence to the first base station, so that the first base station calculates according to the preamble sequence.
  • Uplink timing advance or the second base station locally calculates an uplink timing advance through the preamble sequence, and transmits the uplink timing advance to the first base station.
  • the method further includes the following steps:
  • the preamble sequence being a preamble sequence usable by the second base station.
  • the preamble sequence of the second base station is controlled by the first base station, because the first base station needs to ensure that the dedicated preamble sequence allocated for each user equipment is unique, and the dedicated preamble sequence received by the user equipment may be For the second base station or the first base station, that is, the same preamble sequence may have a possibility of repeated allocation, and therefore the first base station needs to manage the preamble sequence of the second base station.
  • the management includes:
  • the second base station Before the second base station allocates a preamble sequence to the user equipment, requesting, by the first base station, to allocate a preamble sequence for the user equipment;
  • the method further includes the following steps:
  • the method further includes the following steps:
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • FIG. 4 is a flowchart of a method for transmitting uplink data in carrier aggregation according to another embodiment of the present invention, where the method includes:
  • step S401 information for the user equipment to receive the random access response message is sent to the user equipment.
  • the first base station sends, to the user equipment, information for the user equipment to obtain a random access response (RAR) message, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • step S402 a synchronization indication message is sent to the user equipment, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell.
  • the first base station sends, to the user equipment, a synchronization indication message indicating that the user equipment performs random access in the secondary cell located in the second base station, so that the user equipment receives the first base station to send in a subsequent step.
  • the RAW information, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • step S403 receiving a preamble sequence or an uplink timing advance amount sent by the second base station, generating an RAR message including the uplink timing advance amount, and transmitting the RAR message to the user equipment by using a primary cell, where the primary cell Located at the first base station.
  • the first base station generates an RAR message including the uplink timing advance amount according to the received preamble sequence or the uplink timing advance amount sent by the second base station, and after generating the RAR message, passes the main The cell sends the RAR message to the user equipment.
  • the RAR message may include only the uplink timing advance and the preamble sequence.
  • the preamble sequence includes:
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • the method further includes the following steps:
  • the preamble sequence is a preamble sequence that can be used by the second base station.
  • the management includes:
  • the method further includes the following steps:
  • Receiving a usage rate of the preamble sequence periodically reported by the second base station; or receiving the second base station when a usage rate of the preamble sequence is higher or lower than a preset preamble sequence usage threshold The reported usage rate of the leader sequence.
  • FIG. 5 is a structural diagram of an uplink data transmission apparatus in a carrier aggregation according to an embodiment of the present invention. For convenience of description, only the related parts of the embodiment of the present invention are included, including:
  • the information obtaining unit 501 is configured to acquire information for receiving a random access response message.
  • the information acquiring unit 501 in the user equipment acquires information about the random access response (RAR) message obtained by the user equipment from the network side, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • Path loss information of the primary cell acquired by the user equipment and the secondary cell that is or is about to perform random access or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including: The absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell.
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • the synchronization indication message receiving unit 502 is configured to: after the information acquiring unit 501 acquires the information, receive a synchronization indication message sent by the base station, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell, where
  • the base station includes: a first base station or a second base station.
  • the synchronization indication message receiving unit 502 receives a synchronization indication message that is sent by the base station to indicate that the user equipment performs random access on the secondary cell of the second base station, so that the user equipment receives the first base station in the following.
  • the RAW information is sent, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • the preamble sequence sending unit 503 is configured to send a preamble sequence to the second base station by using the secondary cell after the synchronization indication message receiving unit 502 receives the synchronization indication message.
  • the user equipment receives the synchronization indication message sent by the base station, accesses the secondary cell of the second base station according to the indication of the synchronization indication message, and sends a preamble sequence to the second base station by using the secondary cell.
  • the preamble sequence includes:
  • the RAR message receiving unit 504 is configured to receive, according to the information about the RAR message that is acquired by the information acquiring unit 501, an RAR message that includes an uplink timing advance quantity, where the uplink timing advance quantity is a base station according to the preamble sequence sending unit 503.
  • the transmitted preamble sequence is calculated.
  • the RAW information receiving unit 504 receives the RAR message including the uplink timing advance amount according to the information for receiving the RAR message acquired by the information acquiring unit 501.
  • the RAR message receiving unit 504 specifically includes:
  • the delay information acquisition sub-unit 5041 is configured to receive the RAR message according to the obtained delay information of the first base station and the second base station, and includes: When there is no backhaul link delay time between the first base station and the second base station, the user equipment detects and receives the RAR message from the primary cell starting from n subframe times after sending the preamble sequence, n is the default value; or,
  • the user equipment When there is a backhaul link delay between the first base station and the second base station, the user equipment detects and acquires the RAW information or the slave station from the secondary cell starting from the n subframe times after the sending of the preamble sequence Starting at the k+n subframe time after the preamble sequence, detecting, and receiving, the RAR message from the primary cell, where k, n is a time preset for the user equipment; or
  • the user equipment When the backhaul link delay time between the first base station and the second base station is T, the user equipment starts from T+n subframe times or ⁇ subframe time after transmitting the preamble sequence, from the primary cell. Detecting and receiving the RAR message; or
  • the user equipment detects and receives the RAR message from the secondary cell starting from the n subframe times after the sending of the preamble sequence. Or, starting from the first subframe after the sending of the preamble sequence, detecting, and receiving, by the primary cell, the RAR message, where ⁇ is the number of subframes preset by the user terminal, and ⁇ may be equal to T1; or
  • ⁇ is a preset value, where ⁇ can be equal to ⁇ 2.
  • the obtaining end information obtaining subunit 5042 is configured to receive the RAR message according to the acquired end information of the obtained RAW information, including:
  • the user equipment detects and receives the RAR message from the primary cell;
  • the user equipment detects and receives the RAW information from the secondary area of the sending preamble sequence;
  • the secondary cell transmitting the preamble sequence When the secondary cell transmitting the preamble sequence performs blind detection of the common search space, the RAW information is detected and received from the secondary cell transmitting the preamble sequence.
  • the path loss information obtaining subunit 5043 is configured to receive the RAR message according to the obtained path loss information of the primary cell and the secondary cell, including:
  • the user equipment receives the RAR message from the primary cell, where the N is a path loss difference preset by the user equipment;
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is greater than or equal to N, the user equipment receives the RAR message from the secondary cell, where the N is preset by the user equipment. Poor path loss.
  • the monitoring lag time information obtaining sub-unit 5044 is configured to receive the RAR message according to the obtained monitoring lag time information configured by the first base station or the second base station for the user equipment, including: according to the acquired monitoring lag time T3, the user equipment detects and receives the RAR message from the primary cell starting from T3+n subframe times after sending the preamble sequence or starting from T3 subframes, where n is a preset value.
  • the uplink data transmission unit 505 is configured to perform uplink data transmission by using the secondary cell according to an uplink timing advance in the RAR message received by the RAID receiving unit 504.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • FIG. 6 is a structural diagram of an uplink data transmission apparatus in a carrier aggregation according to another embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, including:
  • the information sending unit 601 is configured to send, to the user equipment, information for the user equipment to receive the random access response message.
  • the second base station sends, to the user equipment, information for the user equipment to obtain a random access response (RAR) message, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • the synchronization indication message sending unit 602 is configured to send a synchronization indication message to the user equipment after the information sending unit 601 sends the information, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell.
  • the second base station sends, to the user equipment, a synchronization indication message indicating that the user equipment performs random access in the secondary cell located in the second base station, so that the user equipment is in a subsequent step.
  • the RAW information sent by the first base station is received, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • the preamble sequence receiving unit 603 is configured to send, by the user equipment, a preamble sequence sent by the secondary cell indicated by the unit 602 by using the synchronization indication message.
  • the second base station receives the preamble ij ij sent by the user equipment by using the secondary cell, and the preamble sequence includes:
  • the sending unit 604 is configured to send, to the first base station, a preamble sequence received by the preamble sequence receiving unit 603 or an uplink timing advance amount calculated according to the preamble sequence.
  • the second base station may directly send the preamble sequence to the first base station, so that the first base station calculates according to the preamble sequence.
  • Uplink timing advance or the second base station locally calculates an uplink timing advance through the preamble sequence, and transmits the uplink timing advance to the first base station.
  • the device further includes:
  • a receiving unit configured to receive, by the first base station, management of a preamble sequence that can be used, where the preamble sequence is a preamble sequence that can be used by the second base station.
  • the receiving unit specifically includes:
  • a preamble receiving subunit configured to receive, before running, a preamble sequence allocated by the first base station to the second base station;
  • a requesting a preamble sequence subunit configured to request, by the first base station, a preamble sequence for the user equipment, before the second base station is the user equipment preamble sequence
  • a receiving and receiving subunit configured to receive, after the requesting preamble sequence subunit requests a preamble sequence, the first base station as the preamble sequence allocated for the device.
  • the receiving unit further includes: a change request sending subunit, configured to send, to the first base station, a request for adding or releasing a preamble sequence when the preamble sequence received by the preamble receiving subunit needs to be changed;
  • a change information receiving subunit configured to receive, after the change request sending subunit sends a change request, the first base station to process the request, where the processing includes: the first base station is configured according to the request The information of the preamble sequence added or released by the second base station.
  • the receiving unit further includes:
  • a usage reporting unit configured to periodically report usage of the preamble sequence to the first base station; or, when a usage rate of the preamble sequence is higher or lower than a preset preamble usage threshold, The usage rate of the preamble sequence is reported to the first base station.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • FIG. 7 is a structural diagram of an uplink data transmission apparatus in carrier aggregation according to an embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown:
  • the information sending unit 701 is configured to send, to the user equipment, information for the user equipment to receive the random access response message.
  • the first base station sends, to the user equipment, information for the user equipment to obtain a random access response (RAR) message, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting high A base station of a frequency band carrier, characterized in that the carrier frequency band is high but the coverage is narrow.
  • the first base station and/or the second base station send information to the user equipment by using dedicated signaling or a broadcast message, where the information is used by the user equipment to obtain
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • the synchronization indication message sending unit 702 is configured to send a synchronization indication message to the user equipment after the information sending unit 701 sends the information, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell.
  • the first base station sends, to the user equipment, a synchronization indication message indicating that the user equipment performs random access in the secondary cell located in the second base station, so that the user equipment receives the first base station to send in a subsequent step.
  • the RAW information, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, and a medium access control element (Medium Access) Control Control Element MAC CE ), or Physical Downlink Control Channel ( Physical Downlink)
  • the receiving unit 703 is configured to receive a preamble sequence or an uplink timing advance sent by the second base station after the synchronization indication message sending unit 702 sends the message.
  • the first base station receives the preamble sequence sent by the second base station or the uplink timing advance calculated by the second base station according to the preamble sequence, where the preamble sequence includes:
  • the RAW information sending unit 704 is configured to generate an RAR message including the uplink timing advance amount according to the preamble sequence or the uplink timing advance received by the receiving unit 703, and send the RAR message to the user equipment by using the primary cell.
  • the primary cell is located at the first base station.
  • the first base station generates an RAR message including the uplink timing advance amount according to the received preamble sequence or the uplink timing advance amount sent by the second base station, and after generating the RAR message, passes the main The cell sends the RAR message to the user equipment.
  • the RAR message may only include the uplink timing advance and the preamble sequence.
  • the RAW information sending unit 704 specifically includes:
  • the direct generation subunit 7041 is configured to generate, according to the received uplink timing advance quantity, a RAW information including the uplink timing advance amount.
  • the indirect generation subunit 7042 is configured to calculate an uplink timing advance according to the received preamble sequence, and generate an RAR message including the uplink timing advance amount.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • the device further includes:
  • a management unit configured to manage a preamble sequence stored by the second base station, where the preamble sequence is a preamble sequence that can be used by the second base station.
  • the management unit specifically includes: An allocation subunit, configured to allocate a preamble sequence to the second base station before the second base station is operated; or
  • An allocation request receiving subunit configured to receive a request sent by the second base station to allocate a preamble sequence to the user equipment
  • an allocation sending subunit configured to send, to the second base station, a preamble sequence allocated for the user equipment after the allocation request receiving subunit receives the request.
  • the management unit further includes:
  • a change request receiving subunit configured to receive, when the second base station needs to change a preamble sequence allocated by the allocation subunit, a request for adding or releasing a preamble sequence sent by the second base station;
  • Processing a sending subunit configured to process a request received by the change request receiving subunit, and send the result of the processing to the second base station, where the processing includes: performing, according to the request, the second base station Information about the leader sequence that is added or released.
  • the management unit further includes:
  • a usage receiving subunit configured to receive a usage rate of the preamble sequence periodically reported by the second base station; or, when the usage rate of the preamble sequence is higher or lower than a preset preamble sequence usage threshold Receiving, by using the second base station, the usage rate of the preamble sequence.
  • FIG. 8 is a structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment includes a receiver 801, a processor 802, and a transmitter 803.
  • the processor 802 is configured to perform the following steps:
  • the user equipment obtains information about the random access response (RAR) message obtained by the user equipment from the network side by using multiple methods, where the information includes: a delay information between a base station and a second base station, where the base station includes: a first base station and/or a second base station; or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide;
  • the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station sends information to the user equipment by using dedicated signaling or a broadcast message, where the information is used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • the base station And receiving, by the base station, a synchronization indication message, where the synchronization indication message is used to indicate that the user equipment performs random access on the secondary cell, where the base station includes: a first base station or a second base station.
  • the user equipment receives a synchronization indication message that is sent by the base station to indicate that the user equipment performs random access on the secondary cell of the second base station, so that the user equipment receives the RAW information sent by the first base station in a subsequent manner.
  • the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a radio resource control protocol (Radio Resource Control RRC) message, Medium Access Control Control Element (MAC CE), or Physical Downlink Control Channel (PDCCH) command.
  • Radio Resource Control RRC Radio Resource Control RRC
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • the user equipment receives the synchronization indication message sent by the base station, accesses the secondary cell of the second base station according to the indication of the synchronization indication message, and sends a preamble sequence to the second base station by using the secondary cell.
  • the preamble sequence includes:
  • the uplink timing advance amount is obtained by the base station according to the preamble sequence calculation.
  • the user equipment receives the RAR message including the uplink timing advance according to the acquired information. among them:
  • the user equipment receives the RAR message according to the obtained delay information of the first base station and the second base station, and includes:
  • the user equipment When there is no backhaul link delay time between the first base station and the second base station, the user equipment detects and receives the RAR message from the primary cell starting from n subframe times after sending the preamble sequence, n is the default value; or,
  • the user equipment When there is a backhaul link delay between the first base station and the second base station, the user equipment detects and acquires the RAW information or the slave station from the secondary cell starting from the n subframe times after the sending of the preamble sequence Starting at the k+n subframe time after the preamble sequence, detecting, and receiving, the RAR message from the primary cell, where k, n is a time preset for the user equipment; or
  • the user equipment When the backhaul link delay time between the first base station and the second base station is T, the user equipment starts from T+n subframe times or ⁇ subframe time after transmitting the preamble sequence, from the primary cell. Detecting and receiving the RAR message; or
  • the user equipment detects and receives the RAR message from the secondary cell starting from the n subframe times after the sending of the preamble sequence. Or, starting from the subframe after the sending of the preamble sequence, detecting, and receiving, by the primary cell, the RAR message, where ⁇ is the number of subframes preset by the user terminal, and may be equal to T1; or
  • n is the default value, where n can be equal to T2.
  • the user equipment receives the RAR message according to the acquired end information of the obtained RAR message, and includes:
  • the user equipment detects and receives the RAR message from the primary cell;
  • the user equipment detects and receives the RAR message from the secondary cell of the sending preamble sequence;
  • the secondary cell transmitting the preamble sequence When the secondary cell transmitting the preamble sequence performs blind detection of the common search space, the RAW information is detected and received from the secondary cell transmitting the preamble sequence.
  • the user equipment receives the RAR message according to the obtained path loss information of the primary cell and the secondary cell, including:
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is less than N, the user equipment receives the RAR message from the primary cell, where the N is a path preset by the user equipment. Poor loss; or,
  • the user equipment When the absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell is greater than or equal to N, the user equipment receives the RAR message from the secondary cell, where the N is preset by the user equipment. Poor path loss.
  • the method for receiving the RAR message according to the obtained monitoring delay time information configured by the first base station or the second base station for the user equipment including:
  • the user equipment detects and receives the RAR message from the primary cell, starting from T3+n subframe times after sending the preamble sequence or starting from ⁇ 3 subframes, according to the acquired monitoring lag time T3, where ⁇ is the default value.
  • Uplink data transmission is performed by the secondary cell according to the received uplink timing advance in the RAW information.
  • the UE acquires information for acquiring the RAR message, and sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the uplink that is calculated according to the preamble sequence.
  • the RAR message of the timing advance quantity is used for uplink data transmission by the secondary cell according to the uplink timing advance quantity, and not only the scheme for receiving the RAR message may be determined according to the information, so that the UE ensures that the RAR message is received, and may be based on the uplink timing advance amount. , to ensure the transmission of subsequent uplink data.
  • FIG. 9 is a structural diagram of a second base station according to an embodiment of the present invention.
  • the second base station includes a receiver 901, a processor 902, and a transmitter 903.
  • the transmitter 903 performs the following steps: Sending information for the user equipment to receive a random access response message.
  • the second base station sends, to the user equipment, information for the user equipment to obtain a random access response (RAR) message, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Pcell primary cell
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including:
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • the second base station sends, to the user equipment, a synchronization indication message indicating that the user equipment performs random access in the secondary cell located in the second base station, so that the user equipment receives the first base station to send in a subsequent step.
  • the RAW information, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, a Medium Access Control Control Element (MAC CE), or a Physical Downlink Control Channel (PDCCH) command.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • PDCCH Physical Downlink Control Channel
  • the second base station receives the preamble ij ij sent by the user equipment by using the secondary cell, and the preamble sequence includes:
  • the received preamble sequence or the uplink timing advance calculated according to the preamble sequence is transmitted to the first base station.
  • the second base station may directly send the preamble sequence to the first base station, so that the first base station calculates according to the preamble sequence.
  • Uplink timing advance or the second base station locally calculates an uplink timing advance through the preamble sequence, and transmits the uplink timing advance to the first base station.
  • the processor 902 further performs the following steps: receiving, by the first base station, management of a preamble sequence that can be used, the preamble sequence being a preamble sequence that can be used by the second base station.
  • the preamble sequence of the second base station is controlled by the first base station, because the first base station needs to ensure that the dedicated preamble sequence allocated for each user equipment is unique, and the dedicated preamble sequence received by the user equipment may be For the second base station or the first base station, that is, the same preamble sequence may have a possibility of repeated allocation, and therefore the first base station needs to manage the preamble sequence of the second base station.
  • the management includes:
  • the second base station Before the second base station allocates a preamble sequence to the user equipment, requesting, by the first base station, to allocate a preamble sequence for the user equipment;
  • the method further includes the following steps:
  • the processor 902 further performs the following steps: periodically reporting the usage rate of the preamble sequence to the first base station; or, when the usage rate of the preamble sequence is higher than or When the preamble sequence usage threshold is lower than the preset, the usage rate of the preamble sequence is reported to the first base station.
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell to perform uplink data transmission.
  • the scheme for receiving the RAR message may be determined according to the information, so that the UE can ensure that the RAR message is received, and the subsequent uplink data transmission can be ensured according to the uplink timing advance.
  • FIG. 10 is a structural diagram of a first base station according to an embodiment of the present invention.
  • the first base station includes a receiver 1001, a processor 1002, and a transmitter 1003.
  • the processor 1002 performs the following steps: Information for the user equipment to receive a random access response message is sent to the user equipment.
  • the first base station sends, to the user equipment, information for the user equipment to obtain a random access response (RAR) message, where the information includes:
  • the base station includes: a first base station and/or a second base station; or
  • Path loss information of the primary cell acquired by the user equipment and the secondary cell that is or is about to perform random access or
  • the first base station or the second base station that is sent by the base station to the user equipment is monitoring delay time information configured by the user equipment.
  • the first base station is a macro base station, and the macro base station is a base station for transmitting a low frequency band carrier, which is characterized in that the carrier frequency band is low but the coverage area is wide; the second base station is a small base station, and the small base station is used for transmitting a high frequency band.
  • the base station of the carrier is characterized by a high carrier frequency band but a narrow coverage.
  • the first base station and/or the second base station transmits information to the user equipment by using dedicated signaling or a broadcast message, the information being used by the user equipment to acquire the RAR message. among them:
  • the delay information of the first base station and the second base station including:
  • the backhaul link delay time between the first base station and the second base station is T; or
  • the backhaul link delay time between the first base station and the second base station is greater than T1;
  • the backhaul link delay time between the first base station and the second base station is less than T2.
  • the information about the acquiring end of the RAR message includes:
  • Scell secondary cell
  • Common Search Space CSS Common Search Space CSS
  • the path loss information of the primary cell and the secondary cell that is or is about to perform random access including: The absolute value of the difference between the path loss of the primary cell and the path loss of the secondary cell.
  • the secondary cell is a cell corresponding to the high frequency carrier on the small base station
  • the primary cell is a cell corresponding to the low frequency carrier on the small base station.
  • the secondary cell that sends the preamble sequence is: In a subsequent step, the user equipment is used to send the secondary cell of the preamble sequence to the base station.
  • the first base station sends, to the user equipment, a synchronization indication message indicating that the user equipment performs random access in the secondary cell located in the second base station, so that the user equipment receives the first base station to send in a subsequent step.
  • the RAW information, and the synchronization indication message further includes a dedicated preamble sequence allocated by the first base station or the second base station to the user equipment.
  • the synchronization indication message may be a Radio Resource Control (RRC) message, and a medium access control element (Medium Access)
  • the first base station generates an RAR message including the uplink timing advance amount according to the received preamble sequence or the uplink timing advance amount sent by the second base station, and after generating the RAR message, passes the main The cell sends the RAR message to the user equipment.
  • the RAW information may only include the uplink timing advance and the preamble sequence.
  • generating the RAR message that includes the uplink timing advance including:
  • the UE acquires the information for acquiring the RAR message, sends a preamble sequence to the secondary cell, and receives, according to the information for acquiring the RAR message, the RAW information including the uplink timing advance amount calculated according to the preamble sequence, according to The uplink timing advance is performed by the secondary cell for uplink data transmission, and not only the scheme for receiving the RAR message but also the UE is guaranteed to receive the RAR according to the information.
  • the message can be transmitted according to the uplink timing advance amount to ensure subsequent uplink data transmission.
  • the processor 1002 further performs the following steps: managing a preamble sequence stored by the second base station, where the preamble sequence is a preamble sequence that can be used by the second base station.
  • the management includes:
  • the method further includes the following steps:
  • the processor 1002 further performs the following steps: receiving a usage rate of the preamble sequence periodically reported by the second base station; or, when the usage rate of the preamble sequence is high The usage rate of the preamble sequence reported by the second base station is received at or below a preset preamble sequence usage threshold.

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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 et un dispositif pour transmettre des données de liaison montante dans une agrégation de porteuses. Le procédé comprend : l'acquisition d'informations pour une utilisation pour la réception de messages de réponse d'accès aléatoire (RAR); la réception d'un message d'instruction de synchronisation transmis par une station de base; la transmission d'une séquence de préambule à la seconde station de base par l'intermédiaire de la cellule auxiliaire; la réception, sur la base des informations acquises pour une utilisation pour la réception de messages RAR, d'un message RAR comprenant une valeur d'avance de synchronisation de liaison montante; et la transmission des données de liaison montante par l'intermédiaire de la cellule auxiliaire sur la base de la valeur d'avance de synchronisation de liaison montante dans le message RAR reçu. Des modes de réalisation de la présente invention sont non seulement capables de déterminer une solution pour recevoir le message RAR sur la base des informations, mais sont également capables de garantir la transmission de données de liaison montante suivante sur la base de la valeur d'avance de synchronisation de liaison montante.
PCT/CN2013/086361 2012-10-31 2013-10-31 Procédé et dispositif de transmission de données de liaison montante dans une agrégation de porteuses Ceased WO2014067475A1 (fr)

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