WO2012092898A2 - 重传控制方法、通信***及设备 - Google Patents

重传控制方法、通信***及设备 Download PDF

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Publication number
WO2012092898A2
WO2012092898A2 PCT/CN2012/071022 CN2012071022W WO2012092898A2 WO 2012092898 A2 WO2012092898 A2 WO 2012092898A2 CN 2012071022 W CN2012071022 W CN 2012071022W WO 2012092898 A2 WO2012092898 A2 WO 2012092898A2
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WO
WIPO (PCT)
Prior art keywords
base station
control entity
radio link
handover command
entity
Prior art date
Application number
PCT/CN2012/071022
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English (en)
French (fr)
Other versions
WO2012092898A3 (zh
Inventor
杨东利
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12732081.0A priority Critical patent/EP2802172A4/en
Priority to CN201280000163.9A priority patent/CN102742207B/zh
Priority to PCT/CN2012/071022 priority patent/WO2012092898A2/zh
Publication of WO2012092898A2 publication Critical patent/WO2012092898A2/zh
Publication of WO2012092898A3 publication Critical patent/WO2012092898A3/zh
Priority to US14/449,440 priority patent/US20140341189A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • H04L1/1671Details of the supervisory signal the supervisory signal being transmitted together with control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0058Transmission of hand-off measurement information, e.g. measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02Data link layer protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a retransmission control method, a communication system, and a device.
  • LTE Long Term Evolution
  • MAC Media Access Control
  • HARQ Hybrid Automatic Repeat Request
  • the retransmission of the handover command message can be implemented by using the HARQ technology to ensure that the handover command message is successfully received by the user equipment (User Equipment, UE).
  • An existing handover command retransmission method may be summarized as follows: The UE sends a measurement report (RRC_MEAS_RPRT) to an evolved Node Base Station (eNB), where the measurement report indicates that the signal strength of the target cell is better than the signal strength of the serving cell.
  • the eNB is configured to initiate a handover of the UE; the eNB sends a handover command message (HO_CMD) to the Radio Link Control (RNC) entity of the eNB; the RLC entity of the eNB encapsulates the handover command message into an RLC protocol data unit (Protocol Data Unit) And the PDU is sent to the MAC entity of the eNB; the MAC entity of the eNB encapsulates the RLC PDU into a MAC PDU and delivers the MAC PDU to the MAC entity of the UE through the HARQ channel; the MAC entity of the UE decapsulates the MAC PDU into an RLC PDU and sends the The RLC entity of the UE, and the MAC entity that sends an acknowledgment (ACK) message to the eNB through the HARQ channel; the RLC entity of the UE decapsulates the RLC PDU, obtains a handover command message and sends the message to the UE, and the UE triggers the handover
  • the RLC entity of the eNB cannot learn whether the UE successfully receives the handover command message, and in order to ensure that the handover command message is successfully received by the UE, the RLC entity of the eNB transmits the RLC PDU to the MAC of the eNB multiple times.
  • Entity this process is also called Automatic Repeat Request (ARQ) retransmission;
  • ARQ Automatic Repeat Request
  • each ARQ retransmission of the RLC entity of the eNB causes the MAC entity of the eNB to encapsulate the RLC PDU into a MAC PDU again.
  • the MAC entity that is sent to the UE through the air interface using the HARQ channel (this process is also called HARQ retransmission).
  • the RLC entity of the eNB still triggers the RLC entity ARQ retransmission of the eNB and the HARQ retransmission of the MAC entity of the eNB caused by the ARQ retransmission, thereby seriously consuming the system air interface resources.
  • the embodiment of the invention provides a retransmission control method, a communication system and a device, which can save system air interface resources.
  • An aspect of the present invention provides a retransmission control method, including:
  • the media access control entity of the base station sends the media access control protocol data unit to the terminal by using the hybrid automatic repeat request channel, where the content of the media access control protocol data unit includes a switch command message;
  • the medium access control entity of the base station receives a hybrid automatic repeat request acknowledgement message sent by the terminal by using a hybrid automatic repeat request channel;
  • hybrid automatic repeat request channel of the medium access control protocol data unit of the base station of the base station is the same as the hybrid automatic repeat request channel of the hybrid automatic repeat request acknowledgement message sent by the terminal, And notifying the radio link control entity of the base station to stop sending the handover command message.
  • Another aspect of the present invention provides a retransmission control method, including:
  • the radio link control entity of the base station sends a handover command message to the media access control entity of the base station;
  • the radio link control entity of the base station receives a first notification message sent by the media access control entity of the base station, where the first notification message is used to indicate that the radio link control entity of the base station stops sending the handover command Message
  • the radio link control entity of the base station stops transmitting the handover command message.
  • An aspect of the present invention provides a base station, where the base station includes a media access control entity and a wireless link control entity, where the media access control entity includes:
  • a sending unit configured to send, by using a hybrid automatic repeat request channel, a media access control protocol data unit to the terminal, where the content of the media access control protocol data unit includes a handover command message
  • a receiving unit configured to receive the a hybrid automatic repeat request acknowledgement message sent by the terminal through the hybrid automatic repeat request channel
  • a processing unit configured to trigger the sending unit when the hybrid automatic repeat request channel that sends the media access control protocol data unit is the same as the hybrid automatic repeat request channel that sends the hybrid automatic repeat request acknowledge message to the terminal Notifying the radio link control entity to stop transmitting the handover command message;
  • the sending unit is further configured to notify the radio link control entity to stop sending the handover command message when triggered by the processing unit.
  • An aspect of the present invention provides a base station, where the base station includes a medium access control entity and a wireless link control entity, where the radio link control entity includes:
  • a sending unit configured to send a handover command message to the media access control entity
  • a receiving unit configured to receive a first notification message sent by the media access control entity, where the first notification message is used to instruct the radio link control entity to stop sending the handover command message
  • a control unit configured to: And when the receiving unit receives the first notification message, controlling the sending unit to stop sending the switching command message.
  • An aspect of the present invention provides a communication system, including a base station and a terminal, where the media access control entity of the base station is configured to send, by using a hybrid automatic repeat request channel, a media access control protocol data unit to the terminal, where And the content of the media access control protocol data unit includes a handover command message; and receiving a hybrid automatic repeat request acknowledgement message sent by the terminal by using a hybrid automatic repeat request channel; sending the media access control protocol data in the The hybrid automatic repeat request channel of the unit notifies the radio link control entity of the base station to stop sending the handover command message when the hybrid automatic repeat request channel of the hybrid automatic repeat request acknowledgement message is sent by the terminal.
  • Another aspect of the present invention provides a communication system, including a base station and a terminal, where the radio link control entity of the base station is configured to send a handover command message to a media access control entity of the base station; and receive the base station a first notification message sent by the media access control entity, the first notification message is used to instruct the radio link control entity to stop sending the handover command message; and the radio link control entity stops sending the handover Command message.
  • the RLC entity that informs the eNB stops sending the handover command message, so that the RLC entity of the eNB can stop the ARQ. Retransmission.
  • the foregoing technical solution can reduce the ARQ weight between the RLC entity of the eNB and the MAC entity of the eNB. Therefore, the HARQ retransmission between the MAC entity of the eNB and the MAC entity of the UE caused by the ARQ retransmission can be reduced, thereby effectively saving system air interface resources.
  • FIG. 5 are flowcharts of several retransmission control methods according to an embodiment of the present invention.
  • FIG. 6 is a structural diagram of a MAC entity of a base station according to an embodiment of the present invention.
  • FIG. 7 is a structural diagram of an RLC entity of a base station according to an embodiment of the present invention.
  • FIG. 8 to FIG. 9 are structural diagrams of two communication systems according to an embodiment of the present invention.
  • the embodiment of the invention provides a retransmission control method, a communication system and a device, which can save system air interface resources.
  • the embodiments of the present invention are applicable to a variety of communication systems, and are particularly applicable to a variety of base stations, particularly base stations including a MAC entity and an RLC entity.
  • the following examples of systems and devices made in detail in the various embodiments of the retransmission control method are not to be construed as limiting the invention.
  • One embodiment of the present invention provides a retransmission control method in which the steps in the embodiment can be performed by a MAC entity of an eNB. As shown in FIG. 1, this embodiment includes the following steps.
  • the MAC entity of the eNB sends the MAC PDU to the UE through the HARQ channel, where the content of the MAC PDU includes a handover command message.
  • the MAC entity of the eNB receives the HARQ acknowledgement message sent by the UE through the HARQ channel.
  • the HARQ channel in which the MAC entity of the eNB sends the MAC PDU is the same as the HARQ channel in which the UE sends the HARQ acknowledgment message, notify the RLC entity of the base station to stop sending the handover command message.
  • the MAC entity of the eNB Before the MAC PDU is sent to the UE by using the HARQ channel, the handover command message sent by the RLC entity of the eNB may be further received, and the handover command message is encapsulated into a MAC PDU.
  • the receiving, by the MAC entity of the eNB, the handover command message sent by the RLC entity of the eNB may include:
  • the MAC entity of the eNB receives the first identifier and the RLC PDU sent by the RLC entity of the eNB, where the first identifier is used to indicate that the content of the RLC PDU includes a handover command message.
  • the MAC entity of the eNB may also be before step 103, for example, while performing the step of step 101, or during the period between step 101 and step 103. , record the HARQ channel that sends the MAC PDU. Therefore, the MAC entity of the eNB can conveniently compare whether the HARQ channel that sends the MAC PDU is the same as the HARQ channel that the UE sends the HARQ acknowledgment message, and notify the RLC entity of the eNB to stop sending the handover command message when the comparison result is the same.
  • the MAC entity of the eNB in the foregoing step 103 notifying the RLC entity of the eNB to stop sending the handover command message may be: the MAC entity of the eNB sends the first notification message to the RLC entity of the eNB, where the A notification message is used to indicate that the RLC entity of the eNB stops transmitting the handover command message.
  • the MAC entity of the eNB determines that the MAC PDU is transmitted.
  • the RLC entity that informs the eNB stops transmitting the handover command message, so that the RLC entity of the eNB can stop the ARQ retransmission.
  • the embodiment described in FIG. 1 can reduce ARQ retransmission between an RLC entity of an eNB and a MAC entity of an eNB, thereby reducing HARQ retransmission between a MAC entity of an eNB and a MAC entity of a UE caused by ARQ retransmission, Therefore, the system air interface resources can be effectively saved.
  • Another embodiment of the present invention provides a retransmission control method, which is described by taking a MAC entity of an eNB in an LTE system as an example. As shown in FIG. 2, this embodiment includes the following steps.
  • the MAC entity of the eNB receives a message that is sent by the RLC entity of the eNB, where the message carries the RLC PDU and the first identifier.
  • the first identifier is used to indicate that the content of the RLC PDU includes Change the command message.
  • the MAC entity of the eNB may receive a message sent by the RLC entity of the eNB through the call function.
  • the first identifier may occupy an entry parameter field of the calling function. Thereby, the carrying of the first identification can be easily realized.
  • the MAC entity of the eNB encapsulates the handover command message into a MAC PDU.
  • the MAC entity of the eNB sends the MAC PDU to the MAC entity of the UE through the HARQ channel.
  • the MAC entity of the eNB records the HARQ channel that sends the MAC PDU.
  • the sequence of the foregoing steps 203 and 204 of the MAC entity of the eNB is not limited in the embodiment of the present invention.
  • the MAC entity of the eNB receives the HARQ acknowledgement message sent by the UE through the HARQ channel.
  • the MAC entity of the eNB determines whether the HARQ channel that sends the MAC PDU is the same as the HARQ channel that the UE sends the HARQ acknowledgment message. If yes, sends a first notification message to the RLC entity of the eNB, where the first notification message is used to indicate the RLC of the eNB. The entity stops sending a switch command message.
  • the RLC entity of the eNB may learn that the handover command message has been successfully received by the UE, and the RLC entity of the eNB may stop sending the handover command message, thereby stopping the ARQ retransmission, thereby reducing The ARQ retransmission between the RLC entity of the eNB and the MAC entity of the eNB, and the HARQ retransmission between the MAC entity of the eNB and the MAC entity of the UE caused by the ARQ retransmission, thereby effectively saving system air interface resources.
  • the MAC entity of the eNB in this embodiment determines the same after step 205, the HARQ channel that learns that the UE sends the HARQ acknowledgment message is not the HARQ channel used to send the MAC PDU in the foregoing step 203, so that the eNB The MAC entity cannot determine whether the MAC PDU transmitted by the HARQ channel in the above step 203 includes the handover command message is successfully received by the UE.
  • the MAC entity of the eNB will not send the first notification message to the RLC entity of the eNB, and the RLC entity of the eNB will continue to send the handover command message, that is, perform ARQ retransmission to ensure that the handover command message can be successfully received by the UE.
  • Another embodiment of the present invention provides a retransmission control method, which is an LTE system.
  • the RLC entity of the eNB in the example is taken as an example. As shown in FIG. 3, this embodiment includes the following steps.
  • the RLC entity of the eNB sends a handover command message to the MAC entity of the eNB.
  • the RLC entity of the eNB receives a first notification message sent by the MAC entity of the eNB, where the first notification message is used to indicate that the RLC entity of the eNB stops sending the handover command message.
  • the RLC entity of the eNB stops sending the handover command message.
  • the RLC entity of the eNB in the step 301 sends the handover command message to the MAC entity of the eNB, which may be: the RLC entity of the eNB sends the first identifier and the RLC.
  • the PDU is sent to the MAC entity of the eNB, where the first identifier is used to indicate that the content of the RLC PDU includes a handover command message.
  • the RLC entity of the eNB may further receive the first identifier and the handover command message sent by the controller of the eNB, and the RLC entity of the eNB.
  • the handover command message is encapsulated into an RLC PDU.
  • the controller of the eNB is similar to the MAC entity and the RLC entity of the eNB, and functions as an entity inside the eNB.
  • the RLC entity of the eNB sends the handover command message to the MAC entity of the eNB, if the first notification message sent by the MAC entity of the eNB is received, the handover command message is stopped, so that the eNB
  • the RLC entity can stop the ARQ retransmission and reduce the HARQ retransmission between the MAC entity of the eNB and the MAC entity of the UE caused by the ARQ retransmission, thereby effectively saving system air interface resources.
  • Another embodiment of the present invention provides a retransmission control method, which is described by taking an RLC entity of an eNB in an LTE system as an example. As shown in FIG. 4, this embodiment includes the following steps.
  • the RLC entity of the eNB receives the first identifier and the handover command message sent by the controller of the eNB.
  • the RLC entity of the eNB encapsulates the foregoing handover command message into an RLC PDU.
  • the RLC entity of the eNB carries the foregoing first identifier and the RLC PDU in a message, and sends the message to the MAC entity of the eNB.
  • the first identifier is used to indicate that the content of the RLC PDU includes a handover command message.
  • the RLC entity of the eNB may carry the foregoing first identifier and the RLC PDU in a message, and send the MAC entity to the eNB by using a calling function, where the first identifier may occupy the calling function. Entry parameter field. 404.
  • the RLC entity of the eNB receives a first notification message that is reported by the MAC entity of the eNB, where the first notification message is used to indicate that the RLC entity of the eNB stops sending the handover command message.
  • the RLC entity of the eNB stops sending the handover command message, thereby stopping the ARQ retransmission.
  • the RLC entity of the eNB learns that the handover command message has been successfully received by the UE, and the RLC entity of the eNB may stop sending the handover command message to stop the ARQ retransmission.
  • the RLC entity of the eNB may continue to send the handover command message, that is, continue to perform ARQ retransmission, to ensure that the handover command message can be used by the UE. Received successfully.
  • the RLC entity of the eNB of the LTE system sends the handover command message to the MAC entity of the eNB, if the first notification message sent by the MAC entity of the eNB is received, the handover command message is stopped. Therefore, the RLC entity of the eNB can stop the ARQ retransmission, and reduce the HARQ retransmission between the MAC entity of the eNB and the MAC entity of the UE caused by the ARQ retransmission, so that the air interface resources of the LTE system can be effectively saved.
  • the UE sends a measurement report (RRC_MEAS_RPRT) to the eNB of the serving cell.
  • the measurement report indicates that the signal strength of the target cell is better than the signal strength of the serving cell, and triggers the eNB to initiate handover of the UE.
  • the controller of the eNB sends the first identifier and the handover command message (HO_CMD) to the RLC entity of the eNB.
  • HO_CMD handover command message
  • the RLC entity of the eNB encapsulates the foregoing handover command message into an RLC PDU, and carries the first identifier and the RLC PDU in a message and sends the MAC entity to the eNB (this process is also called initial transmission);
  • An identifier is used to indicate that the content of the RLC PDU includes a handover command message.
  • the MAC entity of the eNB receives the message sent by the RLC entity of the eNB, and encapsulates the handover command message into a MAC PDU, and sends the MAC PDU to the MAC entity of the UE through the HARQ channel.
  • the MAC entity of the eNB may also record the HARQ channel that sends the MAC PDU. 505.
  • the MAC entity of the UE decapsulates the MAC PDU into an RLC PDU and sends the RLC entity to the RLC entity of the UE, and sends a first notification message to the MAC entity of the eNB through the HARQ channel.
  • the RLC entity of the UE decapsulates the RLC PDU, obtains a handover command message, and sends the message to the UE, and the UE triggers a random access request to the target cell.
  • the MAC entity of the eNB receives the MAC entity of the UE and sends the MAC entity through the HARQ channel.
  • the HARQ ACK message is determined, and the recorded HARQ channel is the same as the HARQ channel in which the UE sends the HARQ acknowledgment message, and the first notification message is sent to the RLC entity of the eNB, indicating that the RLC entity of the eNB stops sending the handover command message.
  • the RLC entity of the eNB receives the first notification message reported by the MAC entity of the eNB, stops sending the handover command message, and stops the ARQ retransmission.
  • ARQ retransmission between the RLC entity of the eNB and the MAC entity of the eNB may be reduced, and HARQ retransmission between the MAC entity of the eNB and the MAC entity of the UE caused by ARQ retransmission may be reduced. Therefore, the air interface resources of the LTE system can be effectively saved.
  • An embodiment of the present invention also provides a base station including a MAC entity and an RLC entity.
  • the MAC entity includes a transmitting unit 601, a receiving unit 602, and a processing unit 603.
  • the sending unit 601 is configured to send the MAC PDU to the UE by using the HARQ channel, where the content of the MAC PDU includes a handover command message
  • the receiving unit 602 is configured to receive the HARQ acknowledgment message sent by the UE through the HARQ channel
  • the processing unit 603 is configured to:
  • the trigger sending unit 601 notifies the RLC entity to stop transmitting the handover command message.
  • the sending unit 601 is further configured to notify the RLC entity to stop sending the handover command message when triggered by the processing unit 603.
  • the receiving unit 601 is further configured to receive a handover command message sent by the RLC entity.
  • the MAC entity may further include an encapsulating unit 604, and the encapsulating unit 604 is configured to encapsulate the handover command message received by the receiving unit 601 into a MAC PDU.
  • the receiving unit 601 may receive a message sent by an RLC entity of the base station, where the message carries a first identifier and an RLC PDU.
  • the first identifier is used to indicate that the content of the RLC PDU includes a handover command message. Therefore, the receiving unit 601 can receive the RLC entity to send. Switch command message.
  • the MAC entity may further include a recording unit 605, configured to record a HARQ channel in which the sending unit 601 sends a MAC PDU.
  • the sending unit 601 may send a first notification message to the RLC entity when triggered by the processing unit 603, where the first notification message is used to indicate the RLC entity. Stop sending the switch command message.
  • the base station provided in this embodiment is an eNB.
  • the processing unit 603 notifies the RLC entity to stop transmitting the handover command message in the 601 transmitting the MAC PDU, so that the RLC entity of the base station can stop the ARQ retransmission.
  • the MAC entity of the base station described in FIG. 6 can reduce the ARQ retransmission between the RLC entity of the base station and the MAC entity of the base station, so that the HARQ weight between the MAC entity of the base station and the MAC entity of the UE caused by the ARQ retransmission can be reduced. Pass, which can effectively save system air interface resources.
  • the RLC entity may include a transmitting unit 701, a receiving unit 702, and a control unit 703.
  • the sending unit 701 is configured to send a handover command message to the MAC entity
  • the receiving unit 702 is configured to receive a first notification message sent by the MAC entity, where the first notification message is used to instruct the RLC entity to stop sending the handover command message;
  • the control transmitting unit 701 stops transmitting the handover command message.
  • the sending unit 701 may send a message to the MAC entity, where the message carries the first identifier and the RLC PDU to the MAC entity, where the first identifier is used to indicate that the content of the RLC PDU includes a handover command message.
  • the transmitting unit 701 can be configured to send a handover command message to the MAC entity.
  • the receiving unit 702 is further configured to receive a first identifier and a handover command message sent by a controller of the base station.
  • the RLC entity may further include an encapsulating unit 704, and the encapsulating unit 704 is configured to encapsulate the handover command message into an RLC PDU.
  • the base station provided in this embodiment is an eNB.
  • the transmitting unit 701 sends a handover command message to the base.
  • the control unit 703 controls the sending unit 701 to stop sending the handover command message, so that the RLC entity of the base station can stop the ARQ retransmission, which is reduced by The HARQ retransmission between the MAC entity of the base station and the MAC entity of the UE caused by the ARQ retransmission can effectively save system air interface resources.
  • the communication system may include a base station 801 and a terminal 802.
  • the MAC entity of the base station 801 is configured to send a MAC PDU to the terminal 802 through the HARQ channel.
  • the content of the MAC PDU includes a handover command message; and the HARQ acknowledgment message sent by the receiving terminal 802 through the HARQ channel; when the HARQ channel that sends the MAC PDU is the same as the HARQ channel that the terminal 802 sends the HARQ acknowledgment message, the RLC of the base station 801 is notified.
  • the entity stops sending a switch command message.
  • the structure of the MAC entity of the base station 801 shown in FIG. 8 may be described in detail in the foregoing embodiments, and details are not described herein.
  • the MAC entity of the terminal 802 may decapsulate the MAC PDU into an RLC PDU and send it to the RLC entity of the terminal 802, and send a HARQ acknowledgement message to the MAC entity of the base station 801 through the HARQ channel; and decapsulate the RLC entity of the terminal 802.
  • the RLC PDU may trigger the handover to the target cell.
  • the communication system may include a base station 901 and a terminal 902.
  • the RLC entity of the base station 901 is configured to send a handover command message to the MAC entity of the base station 901. And receiving a first notification message sent by the MAC entity of the base station 901, the first notification message is used to instruct the RLC entity to stop sending the handover command message; and the RLC entity stops sending the handover command message.
  • the structure of the MAC entity and the RLC entity of the base station 901 shown in FIG. 9 may be described in detail in the foregoing embodiments, and details are not described herein.
  • the base station in the communication system shown in Figure 8 and Figure 9 above may be an eNB.
  • the above communication system can reduce the relationship between the RLC entity of the base station and the MAC entity of the base station
  • the ARQ retransmission and the HARQ retransmission between the MAC entity of the base station and the MAC entity of the UE caused by the ARQ retransmission can effectively save system air interface resources.
  • the retransmission control method, the communication system, and the device provided by the embodiments of the present invention can be applied to systems such as LTE and LTE-A.
  • the dotted line indicates that there is a wireless link between the base station and the terminal.
  • the program can be stored in a computer readable storage medium.
  • the storage medium can include: Flash drive, Read-Only Memory (ROM), Random Access Memory (RAM), disk or CD.

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Description

重传控制方法、 通信***及设备 技术领域
本发明涉及移动通信领域,尤其涉及一种重传控制方法、通信***及设备。
背景技术
在长期演进( Long Term Evolution, LTE ) ***中, 为了对抗无线信道时 变和多径衰落对信号传输的影响, 在媒体接入控制 (Media Access Control, MAC )层中引入了混合自动重传请求 ( Hybrid Automatic Repeat Request, HARQ )技术。 其中, HARQ技术能够提高信号传输的可靠性, 已成为 LTE ***中不可或缺的关键技术之一。
在 LTE***中, 采用 HARQ技术可以实现切换命令消息的重传, 以确保 切换命令消息成功被用户设备 ( User Equipment, UE )接收。 现有的切换命令 重传方法可以概述如下: UE发送测量报告 ( RRC_MEAS_RPRT )至服务小区 的基站 ( evolved Node Base Station, eNB ), 该测量报告指示目标小区的信号 强度好于服务小区的信号强度, 触发 eNB启动 UE的切换; eNB发送切换命 令消息 (HO_CMD ) 至 eNB的无线链路控制 ( Radio Link Control, RLC ) 实 体; eNB的 RLC实体将该切换命令消息封装成 RLC协议数据单元(Protocol Data Unit, PDU )并发送至 eNB的 MAC实体; eNB的 MAC实体将该 RLC PDU 封装成 MAC PDU并通过 HARQ通道下发至 UE的 MAC实体; UE的 MAC 实体将 MAC PDU解封装成 RLC PDU并发送至 UE的 RLC实体,以及通过该 HARQ通道发送确认 ( ACK ) 消息给 eNB的 MAC实体; UE的 RLC实体解 封装 RLC PDU, 获得切换命令消息并发送至 UE, UE触发切换到目标小区。 在上述切换命令重传方法中, eNB的 RLC实体无法获悉 UE是否成功接收到 切换命令消息, 而为了确保切换命令消息成功被 UE接收, eNB的 RLC实体 只有多次将 RLC PDU发送至 eNB的 MAC实体(这一过程又称为自动重复请 求( Automatic Repeat Request, ARQ )重传;); eNB的 RLC实体的每次 ARQ 重传又会引起 eNB的 MAC实体再次将该 RLC PDU封装成 MAC PDU并使用 HARQ通道通过空口发送给 UE的 MAC实体(这一过程又称为 HARQ重传)。
实践中发现, 上述切换命令重传方法中, 即使切换命令消息已经被 UE正 确接收的情况下, eNB的 RLC实体仍然触发 eNB的 RLC实体 ARQ重传, 以 及由 ARQ重传导致的 eNB的 MAC实体的 HARQ重传,从而严重消耗了*** 空口资源。
发明内容
本发明实施例提供了一种重传控制方法、通信***及设备, 能够节约*** 空口资源。
本发明的一方面提供一种重传控制方法, 包括:
基站的媒体接入控制实体通过混合自动重传请求通道将媒体接入控制协 议数据单元发送给终端, 其中, 所述媒体接入控制协议数据单元的内容包含切 换命令消息;
所述基站的媒体接入控制实体接收所述终端通过混合自动重传请求通道 发送的混合自动重传请求确认消息;
如果所述基站的媒体接入控制实体发送所述媒体接入控制协议数据单元 的混合自动重传请求通道与所述终端发送所述混合自动重传请求确认消息的 混合自动重传请求通道相同,则通知所述基站的无线链路控制实体停止发送所 述切换命令消息。
本发明的另一方面提供一种重传控制方法, 包括:
基站的无线链路控制实体发送切换命令消息给所述基站的媒体接入控制 实体;
所述基站的无线链路控制实体接收所述基站的媒体接入控制实体发送的 第一通知消息,所述第一通知消息用于指示所述基站的无线链路控制实体停止 发送所述切换命令消息;
所述基站的无线链路控制实体停止发送所述切换命令消息。
本发明的一方面提供一种基站,所述基站包括媒体接入控制实体和无线链 路控制实体, 其中, 所述媒体接入控制实体包括:
发送单元,用于通过混合自动重传请求通道将媒体接入控制协议数据单元 发送给终端,其中,所述媒体接入控制协议数据单元的内容包含切换命令消息; 接收单元,用于接收所述终端通过混合自动重传请求通道发送的混合自动 重传请求确认消息; 及 处理单元,用于在发送所述媒体接入控制协议数据单元的混合自动重传请 求通道与所述终端发送混合自动重传请求确认消息的混合自动重传请求通道 相同时,触发所述发送单元通知所述无线链路控制实体停止发送所述切换命令 消息;
其中, 所述发送单元还用于在受到所述处理单元的触发时,通知所述无线 链路控制实体停止发送所述切换命令消息。
本发明的一方面提供一种基站,所述基站包括媒体接入控制实体和无线链 路控制实体, 其中, 所述无线链路控制实体包括:
发送单元, 用于发送切换命令消息给所述媒体接入控制实体;
接收单元, 用于接收所述媒体接入控制实体发送的第一通知消息, 所述第 一通知消息用于指示所述无线链路控制实体停止发送所述切换命令消息; 及 控制单元, 用于在所述接收单元接收到所述第一通知消息时,控制所述发 送单元停止发送所述切换命令消息。
本发明的一方面提供一种通信***, 包括基站和终端; 其中, 基站的媒体 接入控制实体用于通过混合自动重传请求通道将媒体接入控制协议数据单元 发送给所述终端, 其中, 所述媒体接入控制协议数据单元的内容包含切换命令 消息;以及接收所述终端通过混合自动重传请求通道发送的混合自动重传请求 确认消息;在所述发送所述媒体接入控制协议数据单元的混合自动重传请求通 道与所述终端发送所述混合自动重传请求确认消息的混合自动重传请求通道 相同时, 通知所述基站的无线链路控制实体停止发送所述切换命令消息。
本发明的另一方面提供一种通信***, 包括基站和终端; 其中, 所述基站 的无线链路控制实体用于发送切换命令消息给所述基站的媒体接入控制实体; 以及接收所述基站的媒体接入控制实体发送的第一通知消息,所述第一通知消 息用于指示所述无线链路控制实体停止发送所述切换命令消息;以及所述无线 链路控制实体停止发送所述切换命令消息。
上述技术方案中, eNB的 MAC实体在判断出发送 MAC PDU的 HARQ 通道与 UE发送 HARQ确认消息的 HARQ通道相同后, 通知 eNB的 RLC实 体停止发送切换命令消息, 从而使得 eNB的 RLC实体可以停止 ARQ重传。 上述技术方案可以减少 eNB的 RLC实体与 eNB的 MAC实体之间的 ARQ重 传, 从而可以减少由 ARQ重传导致的 eNB的 MAC实体与 UE的 MAC实体 之间的 HARQ重传, 从而可以有效地节约***空口资源。
附图说明 施例中所需要使用的附图作筒单地介绍, 显而易见地, 下面描述中的附图仅 仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性 劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1~图 5是本发明实施例提供的几种重传控制方法的流程图;
图 6是本发明实施例提供的一种基站的 MAC实体的结构图;
图 7是本发明实施例提供的一种基站的 RLC实体的结构图;
图 8~图 9是本发明实施例提供的两种通信***的结构图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而 不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明实施例提供了一种重传控制方法、通信***及设备, 能够节约*** 空口资源。 本发明实施例适用于多种通信***, 并且具体适用于多种基站, 特 别是包含有 MAC实体和 RLC实体的基站。 以下在各实施例中详细说明重传 控制方法时所作的***和设备的举例不应理解为对本发明的限制。
本发明的一个实施例提供了一种重传控制方法,该实施例中的各步骤可以 由 eNB的 MAC实体来执行。 如图 1所示, 该实施例包括以下步骤。
101、 eNB的 MAC实体通过 HARQ通道将 MAC PDU发送给 UE, 其中, 该 MAC PDU的内容包含切换命令消息。
102、 eNB的 MAC实体接收 UE通过 HARQ通道发送的 HARQ确认消息。
103、 如果 eNB的 MAC实体发送 MAC PDU的 HARQ通道与 UE发送 HARQ确认消息的 HARQ通道相同,则通知基站的 RLC实体停止发送切换命 令消息。
作为一种可选的实施方式, 在图 1所描述的实施例中, eNB的 MAC实体 通过 HARQ通道将 MAC PDU发送给 UE之前,还可以进一步接收 eNB的 RLC 实体发送的切换命令消息, 并将该切换命令消息封装成 MAC PDU。
其中, eNB的 MAC实体将该切换命令消息封装成 MAC PDU的具体实现 过程以及 MAC PDU的具体表现形式都是本领域技术人员所公知的常识,本发 明实施例不作赘述。
作为一种可选的实施方式,上述的 eNB的 MAC实体接收 eNB的 RLC实 体发送的切换命令消息具体可以包括:
eNB的 MAC实体接收 eNB的 RLC实体发送的第一标识和 RLC PDU,其 中, 所述第一标识用于指示所述 RLC PDU的内容包含切换命令消息。
作为一种可选的实施方式, 在图 1所描述的实施例中, eNB的 MAC实体 还可以在步骤 103之前, 例如执行步骤 101 步骤的同时, 或者执行步骤 101 和步骤 103之间的时段内, 记录发送 MAC PDU的 HARQ通道。 从而, eNB 的 MAC实体可以很方便的比较发送 MAC PDU的 HARQ通道与 UE发送 HARQ确认消息的 HARQ通道是否相同, 以及在比较结果相同时通知 eNB的 RLC实体停止发送切换命令消息。
作为一种可选的实施方式,上述步骤 103中的 eNB的 MAC实体通知 eNB 的 RLC实体停止发送切换命令消息具体可以为: eNB的 MAC实体发送第一 通知消息给 eNB的 RLC实体, 所述第一通知消息用于指示 eNB的 RLC实体 停止发送切换命令消息。
在图 1所描述的实施例中, eNB的 MAC实体在判断出发送 MAC PDU的
HARQ通道与 UE发送 HARQ确认消息的 HARQ通道相同后, 通知 eNB的 RLC实体停止发送切换命令消息, 从而使得 eNB的 RLC实体可以停止 ARQ 重传。 图 1所描述的实施例可以减少 eNB的 RLC实体与 eNB的 MAC实体之 间的 ARQ重传, 从而可以减少由 ARQ重传导致的 eNB的 MAC实体与 UE 的 MAC实体之间的 HARQ重传, 从而可以有效地节约***空口资源。
本发明的另一个实施例提供了一种重传控制方法, 该实施例以 LTE *** 中的 eNB的 MAC实体为例进行说明。 如图 2所示, 本实施例包括以下步骤。
201、 eNB的 MAC实体接收 eNB的 RLC实体下发的消息, 该消息中携 带有 RLC PDU和第一标识; 该第一标识用于指示该 RLC PDU的内容包含切 换命令消息。
一个实施例中, eNB的 MAC实体可以接收 eNB的 RLC实体通过调用函 数发送的消息。 其中, 该第一标识可以占用调用函数的入口参数字段。 从而可 以容易实现第一标识的携带。
202、 eNB的 MAC实体将切换命令消息封装成 MAC PDU。
203、 eNB的 MAC实体通过 HARQ通道将 MAC PDU发送至 UE的 MAC 实体。
204、 eNB的 MAC实体记录发送 MAC PDU的 HARQ通道。
其中, 本发明实施例对 eNB的 MAC实体执行上述步骤 203和步骤 204 之间的先后顺序不作限定。
205、 eNB的 MAC实体接收 UE通过 HARQ通道发送的 HARQ确认消息。
206、 eNB的 MAC实体判断发送 MAC PDU的 HARQ通道与 UE发送 HARQ确认消息的 HARQ通道是否相同, 若是, 则发送第一通知消息至 eNB 的 RLC实体, 该第一通知消息用于指示 eNB的 RLC实体停止发送切换命令 消息。
其中, eNB的 RLC实体接收到 eNB的 MAC实体发送的第一通知消息后, 可以获悉切换命令消息已经被 UE成功接收, eNB的 RLC实体可以停止发送 切换命令消息, 实现停止 ARQ重传, 从而减少 eNB的 RLC实体与 eNB的 MAC实体之间的 ARQ重传, 以及由 ARQ重传导致的 eNB的 MAC实体与 UE的 MAC实体之间的 HARQ重传, 从而可以有效地节约***空口资源。
需要说明的是,如果本实施例中的 eNB的 MAC实体在步骤 205之后判断 相同, 则获悉 UE发送 HARQ确认消息的 HARQ通道并不是上述步骤 203中 的用于发送 MAC PDU的 HARQ通道, 从而 eNB的 MAC实体无法确定上述 步骤 203中通过 HARQ通道发送的内容包含切换命令消息的 MAC PDU是否 被 UE成功接收。此时, eNB的 MAC实体将不再发送第一通知消息至 eNB的 RLC实体, eNB的 RLC实体将会继续发送切换命令消息, 即执行 ARQ重传, 以确保切换命令消息可以被 UE成功接收。
本发明的另一个实施例提供了一种重传控制方法, 该实施例以 LTE *** 中的 eNB的 RLC实体为例进行说明。 如图 3所示, 该实施例包括以下步骤。
301、 eNB的 RLC实体发送切换命令消息给 eNB的 MAC实体。
302、 eNB的 RLC实体接收 eNB的 MAC实体发送的第一通知消息, 该 第一通知消息用于指示 eNB的 RLC实体停止发送切换命令消息。
303、 eNB的 RLC实体停止发送切换命令消息。
作为一种可选的实施方式,在图 3所描述的实施例中, 步骤 301中的 eNB 的 RLC实体发送切换命令消息给 eNB的 MAC实体具体可以为: eNB的 RLC 实体发送第一标识和 RLC PDU给 eNB的 MAC实体, 其中, 第一标识用于指 示 RLC PDU的内容包含切换命令消息。
作为一种可选的实施方式, 在图 3所描述的实施例中, 在步骤 301之前, eNB的 RLC实体还可以接收 eNB的控制器发送的第一标识和切换命令消息, 以及 eNB的 RLC实体将切换命令消息封装成 RLC PDU。 可选的, eNB的控 制器与 eNB的 MAC实体、 RLC实体类似, 均作为 eNB内部的一种实体。
在图 3所描述的实施例中, eNB的 RLC实体在发送切换命令消息给 eNB 的 MAC实体之后, 如果接收到 eNB的 MAC实体发送的第一通知消息, 则停 止发送切换命令消息,从而 eNB的 RLC实体可以停止 ARQ重传,减少由 ARQ 重传导致的 eNB的 MAC实体与 UE的 MAC实体之间的 HARQ重传,从而可 以有效地节约***空口资源。
本发明的另一个实施例提供了一种重传控制方法, 该实施例以 LTE *** 中的 eNB的 RLC实体为例进行说明。 如图 4所示, 本实施例包括以下步骤。
401、 eNB的 RLC实体接收 eNB的控制器发送的第一标识和切换命令消 息。
402、 eNB的 RLC实体将上述切换命令消息封装成 RLC PDU。
403、 eNB的 RLC实体将上述第一标识和 RLC PDU携带在一条消息中, 并发送至 eNB的 MAC实体; 该第一标识用于指示 RLC PDU的内容包含切换 命令消息。
可选的, 本实施例中, eNB的 RLC实体可以将上述第一标识和 RLC PDU 携带在一条消息中, 并通过调用函数发送至 eNB的 MAC实体; 其中, 该第一 标识可以占用调用函数的入口参数字段。 404、 eNB的 RLC实体接收 eNB的 MAC实体上报的第一通知消息, 该 第一通知消息用于指示 eNB的 RLC实体停止发送切换命令消息。
405、 eNB的 RLC实体停止发送切换命令消息,进而实现停止 ARQ重传。 其中, eNB的 RLC实体接收到 eNB的 MAC实体发送的第一通知消息之 后, 获悉切换命令消息已经被 UE成功接收, 此时 eNB的 RLC实体可以停止 发送切换命令消息, 实现停止 ARQ重传。
需要说明的是,如果 eNB的 RLC实体没有接收 eNB的 MAC实体发送的 第一通知消息, 那么 eNB的 RLC实体可以继续发送切换命令消息, 即继续执 行 ARQ重传, 以确保切换命令消息可以被 UE成功接收。
在图 4所描述的实施例中, LTE***的 eNB的 RLC实体在发送切换命令 消息给 eNB的 MAC实体之后, 如果接收到 eNB的 MAC实体发送的第一通 知消息, 则停止发送切换命令消息, 从而 eNB的 RLC实体可以停止 ARQ重 传,减少由 ARQ重传导致的 eNB的 MAC实体与 UE的 MAC实体之间的 HARQ 重传, 从而可以有效地节约 LTE***的空口资源。
为更好的说明本发明的又一个实施例提供的一种重传控制方法,以下参考 图 5, 从 LTE***中的 eNB和 UE的角度对该实施例进行说明。 该实施例可 以包括以下步骤。
501、 UE发送测量报告 ( RRC_MEAS_RPRT )至服务小区的 eNB, 该测 量报告指示目标小区的信号强度好于服务小区的信号强度,触发 eNB启动 UE 的切换。
502、 eNB 的控制器发送第一标识和切换命令消息 ( HO_CMD ) 至 eNB 的 RLC实体。
503、 eNB的 RLC实体将上述切换命令消息封装成 RLC PDU, 并将上述 第一标识和 RLC PDU携带在消息中发送至 eNB的 MAC实体(这一过程又称 为初传); 其中, 该第一标识用于指示 RLC PDU的内容包含切换命令消息。
504、 eNB的 MAC实体接收 eNB的 RLC实体发送的消息, 并将切换命 令消息封装成 MAC PDU,并通过 HARQ通道将 MAC PDU发送至 UE的 MAC 实体。
可选地, eNB的 MAC实体还可以记录发送 MAC PDU的 HARQ通道。 505、 UE的 MAC实体将 MAC PDU解封装成 RLC PDU并发送至 UE的 RLC实体, 以及通过该 HARQ通道发送第一通知消息给 eNB的 MAC实体。
506、 UE的 RLC实体解封装 RLC PDU,获得切换命令消息并发送至 UE, UE触发向目标小区发起随机接入请求。
507、 eNB的 MAC实体接收 UE的 MAC实体通过 HARQ通道发送的
HARQ ACK消息,并判断出记录的 HARQ通道与 UE发送 HARQ确认消息的 HARQ通道相同, 发送第一通知消息至 eNB的 RLC实体, 指示 eNB的 RLC 实体停止发送切换命令消息。
其中, 本发明实施例对上述步骤 506和 507的顺序不作限定。
508、 eNB的 RLC实体接收 eNB的 MAC实体上报的第一通知消息, 停 止发送切换命令消息, 实现停止 ARQ重传。
在图 5所描述的实施例中,可以减少 eNB的 RLC实体与 eNB的 MAC实 体之间的 ARQ重传,以及由 ARQ重传导致的 eNB的 MAC实体与 UE的 MAC 实体之间的 HARQ重传, 从而可以有效地节约 LTE***的空口资源。
本发明的一个实施例还提供了一种基站, 该基站包括 MAC 实体和 RLC 实体。 如图 6所示, 该 MAC实体包括发送单元 601、 接收单元 602和处理单 元 603。 其中: 发送单元 601用于通过 HARQ通道将 MAC PDU发送给 UE, 其中, 该 MAC PDU的内容包含切换命令消息; 接收单元 602用于接收 UE通 过 HARQ通道发送的 HARQ确认消息; 处理单元 603用于在发送 MAC PDU 的 HARQ通道与 UE发送 HARQ确认消息的 HARQ通道相同时,触发发送单 元 601通知 RLC实体停止发送切换命令消息。 其中, 发送单元 601还用于在 受到处理单元 603的触发时, 通知 RLC实体停止发送切换命令消息。
作为一种可选的实施方式, 图 6所示的 MAC实体中, 接收单元 601还用 于接收 RLC实体发送的切换命令消息。 相应地, 如图 6所示, 该 MAC实体 还可以包括封装单元 604, 封装单元 604用于将接收单元 601接收到的切换命 令消息封装成 MAC PDU。
作为一种可选的实施方式, 接收单元 601可以接收基站的 RLC实体发送 的消息, 该消息携带有第一标识和 RLC PDU; 该第一标识用于指示 RLC PDU 的内容包含切换命令消息。 从而, 可以实现接收单元 601接收 RLC实体发送 的切换命令消息。
作为一种可选的实施方式, 图 6所示的 MAC实体中, MAC实体还可以 包括记录单元 605, 用于记录发送单元 601发送 MAC PDU的 HARQ通道。
作为一种可选的实施方式, 图 6所示的 MAC实体中, 发送单元 601可以 在受到处理单元 603的触发时, 发送第一通知消息给 RLC实体, 该第一通知 消息用于指示 RLC实体停止发送切换命令消息。
可选的, 本实施例提供的基站为 eNB。
在图 6所描述的基站的 MAC实体中, 处理单元 603在发送 MAC PDU的 601通知 RLC实体停止发送切换命令消息, 从而使得基站的 RLC实体可以停 止 ARQ重传。 图 6所描述的基站的 MAC实体可以减少基站的 RLC实体与基 站的 MAC实体之间的 ARQ重传, 从而可以减少由 ARQ重传导致的基站的 MAC实体与 UE的 MAC实体之间的 HARQ重传, 从而可以有效地节约*** 空口资源。
本发明的另一个实施例提供了一种基站, 该基站包括 MAC 实体和 RLC 实体。 如图 7所示, 该 RLC实体可以包括发送单元 701、 接收单元 702和控 制单元 703。 其中: 发送单元 701用于发送切换命令消息给 MAC实体; 接收 单元 702用于接收 MAC实体发送的第一通知消息, 该第一通知消息用于指示 RLC实体停止发送切换命令消息; 控制单元 703用于在接收单元 702接收到 第一通知消息时, 控制发送单元 701停止发送切换命令消息。
作为一种可选的实施方式, 发送单元 701可以发送消息给 MAC实体, 该 消息携带有的第一标识和 RLC PDU给 MAC实体, 该第一标识用于指示 RLC PDU的内容包含切换命令消息。 从而, 可以实现发送单元 701发送切换命令 消息给 MAC实体。
作为一种可选的实施方式,接收单元 702还用于接收基站的控制器发送的 第一标识和切换命令消息。 相应地, 如图 7所示的 RLC实体中, RLC实体还 可以包括封装单元 704, 封装单元 704用于将切换命令消息封装成 RLC PDU。
可选的, 本实施例提供的基站为 eNB。
在图 7所示的基站的 RLC实体中, 发送单元 701发送切换命令消息给基 站的 MAC实体之后, 如果接收单元 702接收到基站的 MAC实体发送的第一 通知消息, 则控制单元 703控制发送单元 701停止发送切换命令消息,从而基 站的 RLC实体可以停止 ARQ重传, 减少由 ARQ重传导致的基站的 MAC实 体与 UE的 MAC实体之间的 HARQ重传,从而可以有效地节约***空口资源。
本发明的一个实施例提供了一种通信***,如图 8所示, 该通信***可以 包括基站 801和终端 802; 其中, 基站 801的 MAC实体用于通过 HARQ通道 将 MAC PDU发送给终端 802,其中,该 MAC PDU的内容包含切换命令消息; 以及接收终端 802通过 HARQ通道发送的 HARQ确认消息;在发送 MAC PDU 的 HARQ通道与终端 802发送 HARQ确认消息的 HARQ通道相同时,通知基 站 801的 RLC实体停止发送切换命令消息。
可选的, 图 8所示的基站 801的 MAC实体的结构可以参考在前面实施例 中进行了详细介绍, 本发明实施例不作赘述。
可选的, 终端 802的 MAC实体可以将 MAC PDU解封装成 RLC PDU并 发送至终端 802的 RLC实体,以及通过该 HARQ通道发送 HARQ确认消息给 基站 801的 MAC实体; 终端 802的 RLC实体解封装 RLC PDU, 获得切换命 令消息后, 终端 802可以触发切换到目标小区。
本发明的另一个实施例提供了一种通信***,如图 9所示, 该通信***可 以包括基站 901和终端 902; 其中, 基站 901的 RLC实体用于发送切换命令 消息给基站 901的 MAC实体; 以及接收基站 901的 MAC实体发送的第一通 知消息,该第一通知消息用于指示 RLC实体停止发送切换命令消息;以及 RLC 实体停止发送切换命令消息。
可选的, 图 9所示的基站 901的 MAC实体、 RLC实体的结构可以参考在 前面实施例中进行了详细介绍, 本发明实施例不作赘述。
可选的, 上述图 8和图 9所示的通信***中的基站可以为 eNB。
上述的通信***可以减少基站的 RLC 实体与基站的 MAC 实体之间的
ARQ重传, 以及由 ARQ重传导致的基站的 MAC实体与 UE的 MAC实体之 间的 HARQ重传, 从而可以有效地节约***空口资源。
本发明实施例提供的重传控制方法、 通信***及设备可以应用于 LTE、 LTE-A等***中。 其中, 虚线表示基站与终端之间是无线链接。 本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成, 该程序可以存储于一计算机可 读存储介质中, 存储介质可以包括: 闪存盘、 只读存储器 ( Read-Only Memory , ROM ) 、 随机存取器 ( Random Access Memory, RAM ) 、 磁盘或 光盘等。
以上对本发明实施例所提供的重传控制方法、通信***及设备进行了详细 实施例的说明只是用于帮助理解本发明的方法及其核心思想; 同时, 对于本 领域的一般技术人员, 依据本发明的思想, 在具体实施方式及应用范围上均 会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种重传控制方法, 其特征在于, 包括:
基站的媒体接入控制实体通过混合自动重传请求通道将媒体接入控制协 议数据单元发送给终端, 其中, 所述媒体接入控制协议数据单元的内容包含切 换命令消息;
所述基站的媒体接入控制实体接收所述终端通过混合自动重传请求通道 发送的混合自动重传请求确认消息;
如果所述基站的媒体接入控制实体发送所述媒体接入控制协议数据单元 的混合自动重传请求通道与所述终端发送所述混合自动重传请求确认消息的 混合自动重传请求通道相同,则通知所述基站的无线链路控制实体停止发送所 述切换命令消息。
2、 根据权利要求 1所述的重传控制方法, 其特征在于, 在基站的媒体接 入控制实体通过混合自动重传请求通道将媒体接入控制协议数据单元发送给 终端之前, 所述方法还包括:
所述基站的媒体接入控制实体接收所述基站的无线链路控制实体发送的 切换命令消息;
所述基站的媒体接入控制实体将所述切换命令消息封装成所述媒体接入 控制协议数据单元。
3、 根据权利要求 2所述的重传控制方法, 其特征在于, 所述基站的媒体 接入控制实体接收所述基站的无线链路控制实体发送的切换命令消息包括: 所述基站的媒体接入控制实体接收所述基站的无线链路控制实体发送的 第一标识和无线链路控制协议数据单元, 其中, 所述第一标识用于指示所述无 线链路控制协议数据单元的内容包含切换命令消息。
4、 根据权利要求 1~3任一项所述的重传控制方法, 其特征在于, 所述方 法还包括:
所述基站的媒体接入控制实体记录发送所述媒体接入控制协议数据单元 的混合自动重传请求通道。
5、 根据权利要求 1~4任一项所述的重传控制方法, 其特征在于, 所述通 知所述基站的无线链路控制实体停止发送所述切换命令消息包括: 所述基站的媒体接入控制实体发送第一通知消息给所述基站的无线链路 控制实体,所述第一通知消息用于指示所述基站的无线链路控制实体停止发送 所述切换命令消息。
6、 一种重传控制方法, 其特征在于, 包括:
基站的无线链路控制实体发送切换命令消息给所述基站的媒体接入控制 实体;
所述基站的无线链路控制实体接收所述基站的媒体接入控制实体发送的 第一通知消息,所述第一通知消息用于指示所述基站的无线链路控制实体停止 发送所述切换命令消息;
所述基站的无线链路控制实体停止发送所述切换命令消息。
7、 根据权利要求 6所述的重传控制方法, 其特征在于, 所述基站的无线 链路控制实体发送切换命令消息给所述基站的媒体接入控制实体包括:
基站的无线链路控制实体发送第一标识和无线链路控制协议数据单元给 所述基站的媒体接入控制实体, 其中, 所述第一标识用于指示所述无线链路控 制协议数据单元的内容包含切换命令消息。
8、 根据权利要求 7所述的重传控制方法, 其特征在于, 在基站的无线链 路控制实体发送第一标识和无线链路控制协议数据单元给所述基站的媒体接 入控制实体之前, 所述方法还包括:
基站的无线链路控制实体接收所述基站的控制器发送的第一标识和切换 命令消息;
基站的无线链路控制实体将所述切换命令消息封装成无线链路控制协议 数据单元。
9、 一种基站, 其特征在于, 所述基站包括媒体接入控制实体和无线链路 控制实体, 其中, 所述媒体接入控制实体包括:
发送单元,用于通过混合自动重传请求通道将媒体接入控制协议数据单元 发送给终端,其中,所述媒体接入控制协议数据单元的内容包含切换命令消息; 接收单元,用于接收所述终端通过混合自动重传请求通道发送的混合自动 重传请求确认消息; 及
处理单元,用于在发送所述媒体接入控制协议数据单元的混合自动重传请 求通道与所述终端发送混合自动重传请求确认消息的混合自动重传请求通道 相同时,触发所述发送单元通知所述无线链路控制实体停止发送所述切换命令 消息;
其中, 所述发送单元还用于在受到所述处理单元的触发时,通知所述无线 链路控制实体停止发送所述切换命令消息。
10、 根据权利要求 9所述的基站, 其特征在于,
所述接收单元还用于接收所述无线链路控制实体发送的切换命令消息; 所述媒体接入控制实体还包括: 封装单元, 用于将所述接收单元接收到的 切换命令消息封装成媒体接入控制协议数据单元。
11、 根据权利要求 10所述的基站, 其特征在于, 所述接收单元具体用于 接收所述基站的无线链路控制实体发送的消息,所述消息携带有第一标识和无 线链路控制协议数据单元;所述第一标识用于指示所述无线链路控制协议数据 单元的内容包含切换命令消息。
12、 根据权利要求 9~11任一项所述的基站, 其特征在于, 所述媒体接入 控制实体还包括:
记录单元,用于记录所述发送单元发送所述媒体接入控制协议数据单元的 混合自动重传请求通道。
13、 根据权利要求 9~12任一项所述的基站, 其特征在于, 所述发送单元 具体用于在受到所述处理单元的触发时,发送第一通知消息给所述无线链路控 制实体,所述第一通知消息用于指示所述无线链路控制实体停止发送所述切换 命令消息。
14、一种基站,其特征在于, 包括媒体接入控制实体和无线链路控制实体, 其中, 所述无线链路控制实体包括:
发送单元, 用于发送切换命令消息给所述媒体接入控制实体;
接收单元, 用于接收所述媒体接入控制实体发送的第一通知消息, 所述第 一通知消息用于指示所述无线链路控制实体停止发送所述切换命令消息; 及 控制单元, 用于在所述接收单元接收到所述第一通知消息时,控制所述发 送单元停止发送所述切换命令消息。
15、 根据权利要求 14述的基站, 其特征在于, 所述发送单元具体用于发 送消息给所述媒体接入控制实体,所述消息携带有的第一标识和无线链路控制 协议数据单元给所述媒体接入控制实体,所述第一标识用于指示所述无线链路 控制协议数据单元的内容包含切换命令消息。
16、 根据权利要求 15所述的基站, 其特征在于,
所述接收单元还用于接收所述基站的控制器发送的第一标识和切换命令 消息;
所述无线链路控制实体还包括: 封装单元, 用于将所述切换命令消息封装 成无线链路控制协议数据单元。
17、 一种通信***, 其特征在于, 包括基站和终端; 其中, 基站的媒体接 入控制实体用于通过混合自动重传请求通道将媒体接入控制协议数据单元发 送给所述终端, 其中, 所述媒体接入控制协议数据单元的内容包含切换命令消 息;以及接收所述终端通过混合自动重传请求通道发送的混合自动重传请求确 认消息;在所述发送所述媒体接入控制协议数据单元的混合自动重传请求通道 与所述终端发送所述混合自动重传请求确认消息的混合自动重传请求通道相 同时, 通知所述基站的无线链路控制实体停止发送所述切换命令消息。
18、 一种通信***, 其特征在于, 包括基站和终端; 其中, 所述基站的无 线链路控制实体用于发送切换命令消息给所述基站的媒体接入控制实体;以及 接收所述基站的媒体接入控制实体发送的第一通知消息,所述第一通知消息用 于指示所述无线链路控制实体停止发送所述切换命令消息;以及所述无线链路 控制实体停止发送所述切换命令消息。
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EP2802172A2 (en) 2014-11-12
US20140341189A1 (en) 2014-11-20

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