WO2013087015A1 - 用于无线通信的方法和装置以及基站 - Google Patents

用于无线通信的方法和装置以及基站 Download PDF

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Publication number
WO2013087015A1
WO2013087015A1 PCT/CN2012/086591 CN2012086591W WO2013087015A1 WO 2013087015 A1 WO2013087015 A1 WO 2013087015A1 CN 2012086591 W CN2012086591 W CN 2012086591W WO 2013087015 A1 WO2013087015 A1 WO 2013087015A1
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Prior art keywords
data packet
data
identified
packet
frame
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PCT/CN2012/086591
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English (en)
French (fr)
Inventor
韩广林
张戬
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.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12857464.7A priority Critical patent/EP2790437A4/en
Publication of WO2013087015A1 publication Critical patent/WO2013087015A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic control in data switching networks
    • H04L47/10Flow control; Congestion control
    • H04L47/28Flow control; Congestion control in relation to timing considerations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic control in data switching networks
    • H04L47/10Flow control; Congestion control
    • H04L47/32Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames

Definitions

  • the present invention relates to wireless communication technologies, and more particularly to a method and apparatus for wireless communication and a base station.
  • the existing LTE user plane data transmission usually uses the dynamic scheduling of basic air interface resources.
  • the evolved base station eNodeB
  • the UE can send uplink data or receive downlink data.
  • the UE cannot perform the data transmission.
  • Data is sent and received.
  • the UE can only buffer the uplink data that needs to be sent, and wait for the eNodeB to schedule the transmission of the uplink data.
  • the eNodeB is used for the downlink direction.
  • the downlink data is buffered and waiting for the transmission resource of the downlink data to be allocated, and the UE monitors the data transmission indication channel and receives the data on the corresponding downlink resource when receiving the reception indication of the downlink data.
  • the timer of the buffer time of the packet is configured in the Packet Data Convergence Protocol (PDCP) layer (DT, Discard Timer I, for the UE, the timer The timing length is configured by the eNodeB.
  • PDCP Packet Data Convergence Protocol
  • DT Discard Timer I, for the UE, the timer The timing length is configured by the eNodeB.
  • the PDCP layer of the base station or the user equipment receives the data packet to be transmitted, the PDCP layer starts a drop timer for the data packet.
  • the timer expires, the PDCP layer discards the current data packet.
  • Instructing the Radio Link Control (RLC) layer to discard the packet. For the RLC layer, if the packet If it has not been sent, it discards the data packet; if the RLC layer has sent or is transmitting the data packet, it does not discard the data packet and continues to transmit.
  • RLC Radio Link Control
  • the above data transmission method of the prior art discards the data packet if the data packet has not been sent but the timeout period for the data packet has expired, thereby making it possible for the UE side or The network side cannot receive certain specific data packets in time, resulting in a decline in system performance.
  • embodiments of the present invention provide a method and apparatus for wireless communication and a base station, in which data is transmitted or forwarded, a specific data packet is identified and a specific transmission or forwarding is performed thereon. Policies to guarantee reliable receipt of specific packets.
  • An embodiment of the present invention provides a method for wireless communication, including: identifying a data packet that satisfies a predetermined condition in a received data packet; and extracting a first discarding policy for the identified data packet; wherein, the first The discarding policy includes: using a first discard timer for the identified data packet, discarding the identified data packet when the first discard timer expires; wherein, the predetermined condition is not satisfied The timing of the first discarding timer is greater than the timing of the second discarding timer.
  • the first discarding policy includes: : The identified data packet is discarded until the protocol data unit corresponding to the identified data packet is successfully transmitted or until the protocol data unit corresponding to the identified data packet has been delivered to the corresponding bottom layer.
  • An embodiment of the present invention provides a method for wireless communication, including: receiving a data packet sent by an upper layer and a discarding indication for the data packet; if the received data packet is a data packet that meets a predetermined condition, the data packet is not lost. Discarding the data packet; otherwise, if the data packet is not a data packet that satisfies a predetermined condition,
  • the embodiment of the present invention further provides a method for wireless communication, which is applied to a handover process, including: the source base station identifies a data packet in a data packet to be forwarded that satisfies a predetermined condition; and the source base station only targets the target base. The station forwards the identified data packet or the source base station preferentially forwards the identified data packet to the target base station.
  • the embodiment of the present invention further provides a method for wireless communication, which is applied to a handover process, including: at least one of a source base station estimating a forwarding delay and a target air scheduling delay; according to the estimated delay, if forwarding
  • the data packet can arrive at the target base station or be scheduled to the user equipment before the drop timer for the data packet expires, or if the data packet to be forwarded cannot reach the target base station or schedule before the drop timer for the data packet expires
  • the data packet is a data packet satisfying a predetermined condition, the data packet is forwarded; otherwise, the data packet is not forwarded.
  • the present invention further provides an apparatus for wireless communication, comprising: an identification module, configured to identify a data packet in a received data packet that satisfies a predetermined condition; and a processing module, configured to acquire, for the identified data packet a discarding policy, where the first discarding policy includes: using a first discarding timer for the identified data packet, discarding the identified data packet when the first discarding timer expires The timing of the first drop timer is greater than the duration of the second drop timer, compared to the second drop timer used for the data packet that does not satisfy the predetermined condition. Or the first discarding policy includes: until the protocol data unit corresponding to the identified data packet is successfully transmitted or until the protocol data unit corresponding to the identified data packet has been delivered to the corresponding bottom layer, The identified packet is discarded.
  • the embodiment of the present invention further provides an apparatus for wireless communication, including: a receiving module, configured to receive a data packet sent by an upper layer and a discarding indication for the data packet; and an identifying module, configured to identify the wireless link Whether the data packet received by the control layer entity is a data packet that satisfies a predetermined condition; and the processing module is configured to: when the data packet received by the receiving module is a data packet that meets a predetermined condition, does not discard the data packet; The data packet received by the receiving module is not a data packet that satisfies a predetermined condition, and the embodiment of the present invention further provides a base station, including: a first processing module, configured to identify data that meets a predetermined condition in a data packet to be forwarded a second processing module, configured to forward only the target base station Other data packets or preferentially forward the identified data packets to the target base station.
  • a receiving module configured to receive a data packet sent by an upper layer and a discarding indication for the data packet
  • the embodiment of the present invention further provides a base station, including: an estimating module, configured to estimate at least one of a forwarding delay and a target air scheduling delay; and a forwarding module, configured to: according to the estimated delay, if the data to be forwarded The packet can reach the target base station or be scheduled to the user equipment before the drop timer for the data packet times out, or if the data packet to be forwarded cannot reach the target base station or dispatch to the user before the drop timer for the data packet expires The device, but the data packet is a data packet that satisfies a predetermined condition, and the data packet is forwarded; otherwise, the data packet is not forwarded.
  • a base station including: an estimating module, configured to estimate at least one of a forwarding delay and a target air scheduling delay; and a forwarding module, configured to: according to the estimated delay, if the data to be forwarded The packet can reach the target base station or be scheduled to the user equipment before the drop timer for the data packet times out, or if the
  • the method and apparatus for wireless communication in the embodiment of the present invention ensure that a data packet that satisfies a predetermined condition is identified in an LTE air interface transmission, and different discarding or forwarding policies are used for the identified data packet, thereby ensuring a preset
  • the reliable transmission of specific data such as critical data avoids the degradation of system performance.
  • FIG. 1 is a schematic diagram of data transmission using a method for wireless communication according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of data transmission using a method for wireless communication according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of data transmission using a method for wireless communication according to still another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of data transmission using a method for wireless communication according to still another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an apparatus for wireless communication according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an apparatus for wireless communication according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a base station according to another embodiment of the present invention. detailed description
  • Embodiments of the present invention provide a scheme for wireless communication, according to which a device side or network side device or other node device on a wireless transmission link identifies a data packet that satisfies a predetermined condition; for the identified data packet Using the first discard timer, discarding the identified data packet when the first discard timer expires; wherein, the second discard is used for a data packet that does not satisfy the predetermined condition
  • the timing of the first discard timer is greater than the timing of the second discard timer; or, for the identified data packet, the protocol data unit corresponding to the identified data packet
  • the transmission is successful or until the protocol data unit corresponding to the identified data packet has been submitted to the corresponding underlying layer before being discarded.
  • FIG. 1 is a schematic diagram of an upper layer of a PDCP layer transmitting a data packet to a PDCP layer, and a PDCP layer transmitting a received data packet to a lower layer of a PDCP layer, in a method for wireless communication according to an embodiment of the present invention.
  • the lower layer of the PDCP is illustratively an RLC layer.
  • the data packet transmitted by the upper layer entity of the PDCP layer includes a specific data packet, and the specific data packet is provided with indication information for the data packet as a specific data packet.
  • the indication information may be that the upper layer entity of the PDCP layer is set according to the transmitted link condition or the content of the data packet or may be transmitted by other devices on the data packet transmission path before transmitting the data packet to the current device.
  • the link condition is set by the content of the packet.
  • the indication information may be an Explicit Congestion Notification (ECN) for indicating congestion, as may be an explicit congestion notification flag bit set to indicate a congestion status; or may be an explicit congestion notification Receiving an acknowledgment indication; or, may be an indication that the transmission rate has decreased; or, may be Other instructions specified.
  • ECN Explicit Congestion Notification
  • the PDCP entity of the PDCP layer After receiving the data packet, the PDCP entity of the PDCP layer detects the data packet to identify the specific data packet, and if the data packet including the foregoing indication information is identified, the first discarding policy is captured for the identified data packet. .
  • the first discarding strategy will be described in detail below.
  • the above layer transmits five IP packets as an example.
  • the ECN flag of one of the IP packets is set to indicate congestion, indicating that congestion is being experienced.
  • the Service Data Units (SDUs) corresponding to the five IP data packets, that is, SDU1 to SDU5, are sequentially transmitted to the PDCP layer.
  • the PDCP entity of the PDCP layer After receiving the data packet from the upper layer, the PDCP entity of the PDCP layer detects the received data packets SDU1 to SDU5, and extracts the first discarding policy for the ECN flag bit data packet, such as SDU3, which is set to indicate congestion; For a data packet that does not contain an ECN flag bit set to indicate congestion, a second drop policy is retrieved.
  • the second discarding policy includes: starting a second discarding timer for the data packet, and discarding the data packet when the second discarding timing duration of the second discarding timer expires.
  • the first discarding policy for the identified data packet that satisfies the predetermined condition includes: not starting the discard timer until The protocol data unit corresponding to the data packet is transmitted successfully or until the protocol data unit corresponding to the identified data packet has been submitted to the corresponding bottom layer before being discarded. In this case, there is no requirement for whether or not the packet containing the ECN flag set to indicate the congestion status is associated with the drop timer or associated with the drop timer.
  • the first discarding policy includes: starting the discarding timer, but if the protocol data unit corresponding to the data packet has not been successfully transmitted when the discarding timer expires, the data packet is not discarded until the data packet corresponds to After the protocol data unit is successfully transmitted, it is discarded.
  • there is no requirement for which packet containing the ECN flag set to indicate congestion is associated with which drop timer.
  • a packet containing an ECN flag set to indicate congestion may be associated with a second timer. Association.
  • the second drop timer expires, if the protocol data unit corresponding to the data packet has not been successfully transmitted, the data packet is not discarded until the protocol data unit corresponding to the data packet is successfully transmitted to the peer end, and then It is discarded.
  • the first discarding policy includes: starting the first discarding timer, and discarding the data packet when the first discarding timer expires, where the timing of the first discarding timer is greater than the second discarding timer The timing of the time.
  • the first discarding policy includes: starting a discarding timer, detecting whether a protocol data unit corresponding to the data packet has been delivered to the bottom layer when the discarding timer expires, and discarding the data packet if it has been delivered to the bottom layer; Otherwise, the data packet corresponding to the data packet is discarded after the protocol data unit corresponding to the data packet is delivered to the bottom layer.
  • the identified data packet that satisfies the predetermined condition for example, whether the data packet whose ECN flag bit is set to indicate the congestion status is associated with the drop timer, or which drop timer is associated with the request is not required.
  • the first discarding policy includes: starting the discarding timer, and discarding the data packet until the protocol data unit corresponding to the data packet is delivered to the bottom layer.
  • discarding the data packet may include: the PDCP entity discards the data packet after receiving the indication that the underlying entity successfully transmits; or the PDCP entity receives the packet data convergence protocol from the peer end. After the entity's reception is successfully acknowledged, the packet is discarded.
  • the data may be retransmitted without receiving an indication that the reception success is confirmed from the peer or the transmission from the bottom layer is successful.
  • the retransmission timer is started for the sent data packet. If the timer data packet expires, the protocol data unit corresponding to the data packet has not been successfully transmitted, for example, there is still no Upon receiving an indication of successful reception confirmation from the peer or success from the underlying transmission, the packet is resent.
  • the PDCP entity detects that the ECN flag bit in the SDU3 is set. Set to indicate congestion, neither SDU1, SDU2, SDU4, and SDU5 contain an ECN flag set to indicate congestion.
  • the PDCP entity starts a corresponding second drop timer for each SDU. As shown in Figure 1, the discarding timers for SDU1 to SDU4 are all timed out.
  • the PDCP entity discards SDU1, SDU2, and SDU4, and further instructs the lower layer to discard PDU1, PDU2, and PDU4.
  • the PDCP entity does not discard SDU3, and does not indicate the lower layer.
  • the PDU3 is discarded until the PDCP entity receives an indication that the underlying entity has successfully transmitted the packet, and then discards the packet.
  • the embodiment only describes that the ECN flag set to indicate congestion is detected in the data packet.
  • other indication information may be selected to identify a specific data packet.
  • the PDCP entity can also identify the received data packet by detecting it.
  • a PDCP entity may determine whether a data packet should retrieve the first discarding policy by detecting whether the received data packet contains predetermined content.
  • the data packet generated during the video encoding process is taken as an example for description.
  • three types of frames are generally generated.
  • the frame may be divided into an I frame, a P frame, and a B frame.
  • the I frame is a main key frame, and the included The video information is the most
  • the P frame is the secondary key frame, and the information contained therein is slightly less than the I frame
  • the B frame is the non-key frame, which contains the least information and plays the role of enhancing the video quality.
  • the PDCP entity of the device on the user equipment side or the network side or other device on the data packet transmission path may receive the IP data packet from the upper layer, and detect the received data packet.
  • the first discarding policy may be extracted for the data packet.
  • the data packet including the data of the I frame or the partial data of the I frame and the P frame may be included. The data packet of the data or the partial data of the P frame is captured by the first discarding policy.
  • the PDCP entity may further detect whether the data packet includes data or partial data of the initialization segment in the video, and when the data packet includes data or part of data for initializing the segment in the video, Take the first discard policy.
  • data packets containing a particular frame type in the above data packet may be considered in combination with data or partial data containing initialization segments in the video.
  • the PDCP entity can detect the data packet, and can extract the first discarding policy for the data packet containing the I frame or the data of the partial data of the I frame and the data packet containing the data of the initialization segment in the video or part of the data; For other data packets, the second drop policy is taken.
  • the above-described data packet including the ECN flag bit set to indicate congestion, a data packet containing a specific frame type, and/or data or partial data including an initialization segment in the video may also be considered.
  • the PDCP entity may detect, by detecting a data packet, a data packet including an ECN flag bit set to indicate congestion, a data packet containing I frame data or partial data of an I frame, and a data or part including an initialization segment in the video.
  • the data packet is captured by the first discarding policy; for other packets, the second discarding policy is taken.
  • FIG. 2 is a schematic diagram of an upper layer of a PDCP layer transmitting a data packet to a PDCP layer, and a PDCP layer transmitting a received data packet to a lower layer of a PDCP layer, in a method for wireless communication according to still another embodiment of the present invention.
  • the lower layer of the PDCP is illustratively an RLC layer.
  • the PDCP entity of the PDCP layer extracts a corresponding discarding policy for the received data packet according to the indication. For example, if the received data packet is a specific data packet that needs to retrieve the first drop policy according to the indication, the first discarding policy is retrieved; otherwise, the second discard is captured for the received data packet. Strategy.
  • the above indication that the transmitted data packet is a specific data packet may be used to indicate The data packet satisfies an indication of at least one of the following conditions: in the data packet, for example, the header of the data packet includes an ECN flag bit set to indicate congestion; the data packet includes an explicit congestion notification reception confirmation indication; Contains an indication that the transmission rate has been reduced; the data packet contains the data of the I frame in the video or the partial data of the I frame; the data packet contains the data of the P frame in the video or the partial data of the P frame; the data packet contains the initialization points in the video. Segment data or partial data.
  • the above indication may also be an indication to indicate that the data packet meets other predetermined conditions.
  • the first indication information may be used to indicate that the data packet is the specific data packet, and the second indication information is used to indicate that the data packet is not the specific data packet; or the first indication information may be used to indicate that the data packet is The specific data packet described above is not indicated for a data packet that is not the specific data packet.
  • the indication may be indicated by a message such as an inter-layer message, or by using a packet such as its header.
  • the above indication information may be provided using existing fields, existing reserved fields, extended new fields, and the like.
  • the upper layer entity of the PDCP layer may add a field indicating the content of the data packet in the data packet. For example, when the data packet includes the data of the I frame or the partial data of the I frame, the field of the data packet is set to and indicated.
  • This case corresponds to the case of the data packet; when the data packet contains the data of the P frame or the partial data of the P frame, the field of the data packet is set to correspond to the case indicating the data packet; when the data packet contains B When the frame is set, the field of the packet is set to correspond to the case indicating the packet. When the data packet contains data or partial data of the initialization segment in the video, the field of the data packet is set to correspond to the case indicating the data packet.
  • the PDCP layer may not need to detect the data packet, but directly extract the first discarding policy for the data packet according to the received indication of the first discarding policy for the data packet.
  • the corresponding indication information can be identified by detecting the data packet.
  • the RLC layer may be received from its upper layer, for example After the PDCP layer discards the indication of the data packet, it detects whether the received data packet is a specific data packet. If it is detected that the data packet is a predetermined specific data packet, the RLC entity of the RLC layer does not discard the data packet; otherwise, if the data packet is not a specific data packet, and the protocol data unit corresponding to the data packet is still If not transmitted, the RLC entity discards the packet.
  • the RLC layer detects the received data packet to determine if the received data packet is a particular data packet that satisfies at least one of the following conditions:
  • the packet contains an explicit congestion notification indication for indicating congestion
  • the data packet includes an explicit congestion notification receiving confirmation indication
  • the packet contains an indication that the transmission rate has decreased
  • the data packet contains data of an I frame or partial data of an I frame in the video
  • the data packet contains data of a P frame or a partial data of a P frame in the video
  • the data packet contains data or partial data of the initialization segment in the video.
  • the RLC entity is not limited to detecting whether the data packet satisfies the above conditions, and the RLC entity detects whether the data packet satisfies any of the preset conditions as needed.
  • the RLC entity of the RLC layer when the PDCP layer transmits the data packet to the RLC layer, and simultaneously indicates whether the data packet is a specific data packet, the RLC entity of the RLC layer receives the discarded data from the PDCP layer. After the indication of the packet, determining whether to discard the data packet according to whether the data packet is an indication of a specific data packet; if the PDCP layer indicates that the transmitted data packet is a specific data packet, the RLC entity of the RLC layer does not discard the data packet. The data packet; otherwise, if the data packet is not a specific data packet and the data packet has not been transmitted yet, the RLC entity discards the data packet.
  • the PDCP layer may indicate whether the data packet is a specific data packet by using a message such as an inter-layer message or by using a data packet such as its packet header.
  • a message such as an inter-layer message
  • a data packet such as its packet header.
  • the existing field, the existing reserved field, the extended new field, etc. may be used to provide the data packet.
  • the PDCP layer indicates whether the transmitted data packet is at least one of the following conditions Specific data package for the item:
  • the packet contains an explicit congestion notification indication for indicating congestion
  • the data packet includes an explicit congestion notification receiving confirmation indication
  • the packet contains an indication that the transmission rate has decreased
  • the data packet contains data of an I frame or partial data of an I frame in the video
  • the data packet contains data of a P frame or a partial data of a P frame in the video
  • the data packet contains data or partial data of the initialization segment in the video.
  • the PDCP layer indication is not limited to indicating whether the data packet satisfies the above conditions, and the PDCP layer can indicate whether the data packet satisfies any of the preset conditions as needed.
  • FIG. 3 is a schematic diagram of a method for wireless communication according to an embodiment of the present invention, in a handover process between a source base station and a target base station, from a source base station such as a PDCP layer of a source evolved base station (eNodeB) to a target base station such as a target evolved base station (eNodeB)
  • a source base station such as a PDCP layer of a source evolved base station (eNodeB)
  • eNodeB source evolved base station
  • eNodeB target evolved base station
  • the data packet generated during the process of receiving the received video encoding is taken as an example for description.
  • the PDCP entity of the source base station first identifies whether the data packet is a predetermined specific data packet before forwarding the data packet, and if the data packet is a predetermined specific data packet, the data packet is forwarded to the data packet.
  • the target base station forwards; otherwise, it does not forward.
  • the PDCP entity of the source base station may identify the specific data packet by detecting the received data packet or according to the received indication, and the process of identifying the specific data packet is similar to the foregoing embodiment. Further details will be given.
  • the predetermined specific data packet may be a data packet that satisfies one of the following predetermined conditions:
  • the packet contains an explicit congestion notification indication for indicating congestion
  • the data packet includes an explicit congestion notification receiving confirmation indication
  • the packet contains an indication that the transmission rate has decreased
  • the data packet includes data of an I frame in the video or partial data of the I frame;
  • the data packet includes data of a P frame in the video or partial data of the P frame;
  • the data packet contains data or partial data of the initialization segment in the video.
  • the PDCP entity first identifies whether the data packet contains data of an I frame or a P frame in the video or part of data of an I frame or a P frame before forwarding the data packet; if yes, forwarding; otherwise , not forwarded.
  • P1 contains P frame data
  • P6 contains I frame data.
  • the PDCP entity of the source base station after identifying the P frame data in P1 and the I frame data in P6, forwards only P1 and P6, but does not forward other data packets P2 to P5 and P7 and P8.
  • the identified specific packet may be preferentially forwarded, and at this time, P2 to P5, P7, and P8 are also forwarded, but P1 and P6 are forwarded preferentially.
  • the relationship between the I frame or the P frame and the PDCP SDU is one-to-one.
  • the relationship between an I frame or a P frame and a PDCP SDU is one-to-many.
  • FIG. 4 is a schematic diagram of forwarding a buffered data packet from a PDCP layer of a source base station to a PDCP layer of a target base station during handover of a source base station and a target base station by using a method for wireless communication according to another embodiment of the present invention.
  • the PDCP entity of the source base station can estimate the delay before forwarding the buffered data packet, and the estimated delay estimate includes forwarding delay and/or packet from the source base station to the target base station.
  • the forwarding delay and the target air scheduling delay may be estimated by using the forwarding information of the S1-U interface or the forwarding information of the X2 interface or the like.
  • the PDCP entity determines, according to the estimated delay, whether the data packet to be forwarded can reach the target base station or be scheduled to the user equipment (UE, User Equipment) before the drop timer for the data packet expires. Or whether it can reach the target base station or schedule to the UE within the delay required by QoS (Quality of Service); if yes, forward the data packet; otherwise, the PDCP entity further identifies whether the data packet is a predetermined specific Data; if If it is a predetermined data packet, the predetermined data packet is forwarded; otherwise, the data packet is not forwarded.
  • the PDCP entity can determine whether the data packet is a predetermined specific data packet by detecting the data packet or according to the received indication.
  • the PDCP entity may determine whether the data packet is a data packet satisfying a predetermined condition by detecting the data packet or according to the received indication, for example, determining whether the data packet is a data packet satisfying at least one of the predetermined conditions described above.
  • a specific packet is described as an example of a packet including I frame or P frame data or partial data of an I frame or a P frame.
  • the PDCP entity determines that the data packets P1 to P6 cannot be in the same
  • the drop timer corresponding to P2 to P5 arrives at the target base station before the timeout expires, and P7 and P8 can reach the target base station before the corresponding drop timer for it expires; and, the PDCP entity recognizes that P1 is the data containing the P frame.
  • the data packet, and P6 are data packets containing I frame data; therefore, the PDCP entity of the last source base station does not forward P2 to P5, and forwards P1, P6, P7, and P8.
  • P1 and P6 including I frame data or P frame data can be preferentially forwarded.
  • the step of identifying whether the data packet is a specific data packet and the estimated delay and determining whether the data packet can reach the target within the specified time limit of the drop timer or the time required by Qos The steps of the base station are not limited to the above order. In other variations, it is also possible to first identify whether a data packet is a particular data packet with a particular feature.
  • an embodiment of the present invention provides an apparatus 500 for wireless communication, including: an identification module 501, configured to identify a data packet in a received data packet that satisfies a predetermined condition; and a processing module 502. And extracting a first discarding policy for the identified data packet, where the first discarding policy is: using a first discarding timer for the identified data packet, in the first discarding timer When the timeout expires, discarding the identified data packet; wherein, the timing of the first drop timer is greater than the second discard timer used for the data packet that does not satisfy the predetermined condition
  • the timing of the second drop timer is: or the first discarding policy is: until the protocol data unit corresponding to the identified data packet is successfully transmitted or until the protocol data unit corresponding to the identified data packet has been Submit to After the corresponding underlying layer, the identified packets are discarded.
  • identification modules and processing modules may be implemented in a packet data aggregation protocol entity or in other entities that implement the functions of the packet data aggregation protocol layer, by way of example and not limitation.
  • the predetermined condition may include at least one of the following conditions: receiving an indication that the first drop policy is used for the data packet; the data packet includes an explicit for indicating congestion The congestion notification indication; the data packet includes an explicit congestion notification reception confirmation indication; the data packet includes an indication that the transmission rate has decreased; the data packet includes the data of the I frame in the video or the partial data of the I frame; the data packet includes the video The data of the P frame or the partial data of the P frame; the data packet contains the data of the initialization segment in the video or the partial data of the initialization segment.
  • the identification module further identifies the data packet satisfying the predetermined condition by detecting the received data packet or according to the received indication.
  • the discarding the identified data packet until the protocol data unit corresponding to the identified data packet is successfully transmitted includes: not discarding the discard timing for the identified data packet And discarding the identified data packet until the protocol data unit corresponding to the identified data packet is successfully transmitted; or, for the identified data packet, starting a discard timer, if the data is identified for When the packet discarding timer expires, the protocol data unit corresponding to the identified data packet has not been successfully transmitted, and the identified data packet is not discarded until the identified data packet is successfully transmitted, and the identified data packet is recognized. Packets are dropped.
  • the successfully transmitting the protocol data unit corresponding to the identified data packet includes: receiving an indication that the transmission from the bottom layer is successful; or receiving the packet data convergence protocol entity from the peer end successfully. confirm.
  • discarding the identified data packet includes:
  • a retransmission timer is started for the transmitted data packet, if And before the expiration of the retransmission timer, the protocol data unit corresponding to the identified data packet has not been successfully transmitted, and the identified data packet is retransmitted.
  • the discarding the identified data packet until the protocol data unit corresponding to the identified data packet has been delivered to the corresponding bottom layer includes: for the identified data packet, Do not start the discard timer until the identified data packet corresponding to the identified data packet has been delivered to the bottom layer, and then discard the identified data packet; or, for the identified data packet, start the discard timing And, if the protocol data unit corresponding to the identified data packet has not been delivered to the bottom layer when the discard timer for the identified data packet times out, the identified data packet is not discarded until The identified data packet is discarded after the protocol data unit corresponding to the identified data packet has been delivered to the bottom layer.
  • the embodiment of the present invention further provides an apparatus 600 for wireless communication, including: a receiving module 601, configured to receive a data packet sent by an upper layer and a discarding indication for the data packet;
  • the module 602 is configured to identify whether the data packet received by the receiving module is a data packet that meets a predetermined condition, and the processing module 603 is configured to: when the data packet received by the receiving module is a data packet that meets a predetermined condition, Discarding the data packet; the data packet received by the receiving module is not for pre-discarding the data packet.
  • the receiving module, the identifying module, and the processing module of the embodiment may be implemented in a radio link control layer entity or other entity capable of implementing radio link control layer functions, by way of example and not limitation. .
  • the preset condition includes one of the following: the data packet includes an explicit congestion notification indication for indicating congestion; and the data packet includes an explicit congestion notification reception confirmation indication;
  • the data packet includes an indication that the transmission rate has been reduced;
  • the data packet includes data of an I frame in the video or part of data of the I frame;
  • the data packet includes data of a P frame in the video or part of data of the P frame;
  • the identification module identifies whether the data packet satisfies a predetermined condition by detecting the received data packet or according to the received indication.
  • the embodiment of the present invention further provides a base station 700, including: a first processing module 701, configured to identify a data packet in a data packet to be forwarded that satisfies a predetermined condition; and a second processing module 702, The identified data packet is forwarded only to the target base station or the identified data packet is preferentially forwarded to the target base station.
  • a first processing module 701 configured to identify a data packet in a data packet to be forwarded that satisfies a predetermined condition
  • a second processing module 702 The identified data packet is forwarded only to the target base station or the identified data packet is preferentially forwarded to the target base station.
  • the preset condition includes one of the following: the data packet includes an explicit congestion notification indication for indicating congestion; and the data packet includes an explicit congestion notification reception confirmation indication;
  • the data packet includes an indication that the transmission rate has been reduced; the data packet includes the data of the I frame in the video or the partial data of the I frame; the data packet includes the data of the P frame in the video or the partial data of the P frame;
  • the embodiment of the present invention further provides a base station 800, including: an estimating module 801, configured to estimate at least one of a forwarding delay and a target air scheduling delay; and a forwarding module 802, configured to use the estimated delay If the packet to be forwarded can reach the target base station or be scheduled to the user equipment before the drop timer for the data packet expires, or if the data packet to be forwarded cannot arrive before the drop timer for the data packet expires The target base station or the user equipment is scheduled, but the data packet is a data packet that satisfies a predetermined condition, and the data
  • the predetermined condition includes one of the following: the data packet includes an explicit congestion notification identifier for indicating congestion; the data packet includes an explicit congestion notification reception confirmation indication; and the data packet includes Including the indication that the transmission rate has been reduced; the data packet includes the data of the I frame or the partial data of the I frame in the video; the data packet includes the data of the P frame or the partial data of the P frame in the video; the data packet should be understood by those skilled in the art
  • the various entities or modules included in the device may be implemented by means of software, hardware or a combination of software and hardware.

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Abstract

本发明提供了一种用于无线通信的方法和装置以及基站,该方法包括:识别所接收的数据包中满足预定条件的数据包;针对所识别的数据包采取第一丢弃策略;其中,第一丢弃策略包括:针对所识别的数据包采用第一丢弃定时器,在第一丢弃定时器超时时,丢弃所识别的数据包;其中,与针对不满足预定条件的数据包所采用的第二丢弃定时器相比,第一丢弃定时器的定时时长大于第二丢弃定时器的定时时长;或者,第一丢弃策略包括:直到所识别的数据包所对应的协议数据单元传输成功或直到所识别的数据包所对应的协议数据单元已经被递交给相应的底层后,才将所识别的数据包丢弃。利用该方案,可以保障预先设定的特定数据包的可靠传输。

Description

用于无线通信的方法和装置以及基站
本申请要求于 2011 年 12 月 13 日提交中国专利局、 申请号为 201110425822.0、 发明名称为"用于无线通信的方法和装置以及基站"的中国专 利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术,特别涉及一种用于无线通信的方法和装置以及 基站。
背景技术
现有的 LTE 用户面数据传输通常釆用基本空口资源动态调度的方式。 利 用这种方式来进行数据传输, 当演进型基站 ( eNodeB )调度资源给用户设备 ( UE, User Equipment ) 时, UE才能发送上行数据或接收下行数据; 当没有 资源调度给 UE时, UE不能进行数据的收发。 在 UE因为没有资源调度给它 的资源而不能进行数据的收发的情况下, 对于上行方向, UE只能緩存需要发 送的上行数据,并等待 eNodeB调度分配上行数据的发送资源;对于下行方向, eNodeB緩存下行数据并等待分配下行数据的发送资源, 而 UE则监听数据传 输指示信道,并当其接收到下行数据的接收指示时在对应的下行资源上接收数 据。
为了避免数据在 eNodeB或 UE中緩存时间过长,在长期演进( LTE , Long
Term Evolution )的系统的分组数据汇聚协议 ( PDCP, Packet Data Convergence Protocol )层中配置一个数据包的緩存时间的定时器即丟弃定时器( DT, Discard Timer I 对于 UE 而言, 该定时器的定时长度由 eNodeB 配置。 当基站或用户 设备的 PDCP层接收到需要传输的数据包时, PDCP层针对该数据包启动丟弃 定时器。 当该定时器超时, 则 PDCP层丟弃当前数据包并指示无线链路控制 ( RLC, Radio Link Control )层丟弃该数据包。 对于 RLC层, 如果该数据包 还没有被发送, 则其丟弃该数据包; 如果 RLC层已经发送或正在发送该数据 包, 则不丟弃该数据包, 并继续发送。
现有技术的上述数据传输方法,对于所有的数据包、 均在数据包尚未被发 送而针对数据包的丟弃定时器已超时的情况下丟弃该数据包,从而有可能使得 由于 UE侧或网络侧不能及时接收到某些特定的数据包而导致系统性能的下 降。
发明内容
考虑到现有技术的上述缺陷,本发明实施例提供一种用于无线通信的方法 和装置以及基站, 在数据的传输或转发中,识别特定的数据包并对其釆取特定 的传输或转发策略, 以保障特定数据包的可靠接收。
本发明实施例提供一种用于无线通信的方法, 包括: 识别所接收的数据包 中满足预定条件的数据包; 针对所识别的数据包釆取第一丟弃策略; 其中, 所 述第一丟弃策略包括: 针对所识别的数据包釆用第一丟弃定时器,在所述第一 丟弃定时器超时时, 丟弃所识别的数据包; 其中, 与针对不满足所述预定条件 的数据包所釆用的第二丟弃定时器相比,所述第一丟弃定时器的定时时长大于 所述第二丟弃定时器的定时时长; 或者, 所述第一丟弃策略包括: 直到所识别 的数据包所对应的协议数据单元传输成功或直到所识别的数据包对应的协议 数据单元已经被递交给相应的底层后, 才将所识别的数据包丟弃。
本发明实施例提供一种用于无线通信的方法, 包括: 接收上层发送的数据 包和针对所述数据包的丟弃指示;如果所接收的数据包为满足预定条件的数据 包,则不丟弃所述数据包; 否则,如果所述数据包不为满足预定条件的数据包,
本发明实施例还提供一种用于无线通信的方法, 应用于切换过程, 包括: 源基站识别要转发的数据包中满足预定条件的数据包;所述源基站只向目标基 站转发所识别的数据包或者所述源基站优先向所述目标基站转发所识别的数 据包。
本发明实施例还提供一种用于无线通信的方法, 应用于切换过程, 包括: 源基站估计转发时延和目标空中调度时延中的至少一项; 根据所估计的时延, 如果要转发的数据包能够在针对该数据包的丟弃定时器超时前到达目标基站 或调度给用户设备,或者如果要转发的数据包不能在针对该数据包的丟弃定时 器超时前到达目标基站或调度给用户设备,但是所述数据包为满足预定条件的 数据包, 则转发所述数据包; 否则, 不转发所述数据包。
本发明实施了还提供一种用于无线通信的装置, 包括: 识别模块, 用于识 别所接收的数据包中满足预定条件的数据包; 处理模块, 用于针对所识别的数 据包釆取第一丟弃策略; 其中, 所述第一丟弃策略包括: 针对所识别的数据包 釆用第一丟弃定时器, 在所述第一丟弃定时器超时时, 丟弃所识别的数据包; 其中, 与针对不满足所述预定条件的数据包所釆用的第二丟弃定时器相比, 所 述第一丟弃定时器的定时时长大于所述第二丟弃定时器的定时时长; 或者, 所 述第一丟弃策略包括:直到所识别的数据包所对应的协议数据单元传输成功或 直到所识别的数据包对应的协议数据单元已经被递交给相应的底层后,才将所 识别的数据包丟弃。
本发明实施例还提供一种用于无线通信的装置, 包括: 接收模块, 用于接 收上层发送的数据包和针对所述数据包的丟弃指示; 识别模块, 用于识别所述 无线链路控制层实体所接收的数据包是否为满足预定条件的数据包; 处理模 块, 用于在所述接收模块所接收的数据包为满足预定条件的数据包时, 不丟弃 所述数据包; 在所述接收模块所接收的数据包不为满足预定条件的数据包、并 本发明实施例还提供一种基站, 包括: 第一处理模块, 用于识别要转发的 数据包中满足预定条件的数据包; 第二处理模块, 用于只向目标基站转发所识 别的数据包或者优先向所述目标基站转发所识别的数据包。
本发明实施例还提供一种基站, 包括: 估计模块, 用于估计转发时延和目 标空中调度时延中的至少一项; 转发模块, 用于根据所估计的时延, 如果要转 发的数据包能够在针对该数据包的丟弃定时器超时前到达目标基站或调度给 用户设备,或者如果要转发的数据包不能在针对该数据包的丟弃定时器超时前 到达目标基站或调度给用户设备, 但是所述数据包为满足预定条件的数据包, 则转发所述数据包; 否则, 不转发所述数据包。
本发明实施例的用于无线通信的方法及装置, 通过在 LTE空口传输中识 别出满足预定条件的数据包,并针对所识别的数据包釆用不同的丟弃或转发策 略,保障了预先设定的特定数据如关键数据的可靠传输,避免了系统性能的下 降。
附图说明
图 1 为利用根据本发明一实施例的用于无线通信的方法进行数据传输的 示意图;
图 2 为利用根据本发明另一实施例的用于无线通信的方法进行数据传输 的示意图;
图 3 为利用根据本发明又一实施例的用于无线通信的方法进行数据传输 的示意图;
图 4 为利用根据本发明又一实施例的用于无线通信的方法进行数据传输 的示意图;
图 5为本发明一实施例的用于无线通信的装置的示意图;
图 6为本发明另一实施例的用于无线通信的装置的示意图;
图 7为本发明一实施例的基站的示意图;
图 8为本发明另一实施例的基站的示意图。 具体实施方式
本发明的实施例提供一种用于无线通信的方案,按照该方案,设备侧或网 络侧的设备或者无线传输链路上的其它节点设备识别满足预定条件的数据包; 针对所识别的数据包釆用第一丟弃定时器,在所述第一丟弃定时器超时时,丟 弃所识别的数据包; 其中, 与针对不满足所述预定条件的数据包所釆用的第二 丟弃定时器相比,所述第一丟弃定时器的定时时长大于所述第二丟弃定时器的 定时时长; 或者, 针对所识别的数据包, 直到所识别的数据包所对应的协议数 据单元传输成功或直到所识别的数据包对应的协议数据单元已经被递交给相 应的底层后, 才将其丟弃。 如本领域的技术人员所理解的, 可以根据需要和 / 或具体的应用场景来设置上述预定条件。 下面将结合附图详细描述本发明的各个实施例。 图 1为在根据本发明一实施例的用于无线通信的方法中, PDCP层的上层 将数据包传送至 PDCP层,以及 PDCP层将所接收的数据包传送至 PDCP层的 下层的示意图。 在该实施例中, PDCP的下层示例性地为 RLC层。
如图 1中所示出的, PDCP层的上层实体所传送的数据包中包括特定数据 包, 所述特定数据包中设置有用于数据包为特定数据包的指示信息。该指示信 息可以是 PDCP层的上层实体根据传输的链路情况或者是数据包的内容所设 置的或者可以是由数据包传输路径上的其他设备在将数据包传送至当前的设 备前根据传输的链路情况或者是数据包的内容所设置的。 示例性地, 该指示信 息可以是用于指示拥塞的显式拥塞通告( ECN, Explicit Congestion Notification ) 指示如可以是被设置为指示拥塞状态的显式拥塞通告标志位;或者可以是显式 拥塞通告接收确认指示; 或者, 可以是发送速率已降低的指示; 或者, 可以是 所指定的其它指示信息。
PDCP层的 PDCP实体在接收到数据包后, 对数据包进行检测, 以识别出 特定数据包,如果识别出包含上述指示信息的数据包, 则针对识别出的数据包 釆取第一丟弃策略。 第一丟弃策略将在下文详细描述。
该例中, 以上层传送 5个 IP数据包为例。 其中一个 IP数据包的 ECN标 志位被设置成指示拥塞, 即指示正在经历拥塞。 这 5个 IP数据包对应的服务 数据单元( SDU, Service Data Unit ) 即 SDU1至 SDU5按照顺序依次被发送 到 PDCP层。
PDCP层的 PDCP 实体接收来自上层的数据包后, 对所接收的各数据包 SDU1至 SDU5进行检测, 对于包含被设置为指示拥塞的 ECN标志位数据包 如 SDU3 , 釆取第一丟弃策略; 对于不包含被设置为指示拥塞的 ECN标志位 的数据包, 釆取第二丟弃策略。
其中, 第二丟弃策略包括: 针对数据包启动第二丟弃定时器, 并在第二丟 弃定时器的第二丟弃定时时长超时时, 丟弃数据包。
其中,对于所识别的满足预定条件的数据包(该例中是对于包含被设置为 指示拥塞的 ECN标志位的数据包)釆取的第一丟弃策略包括: 不启动丟弃定 时器,直到数据包所对应的协议数据单元传输成功或直到所识别的数据包对应 的协议数据单元已经被递交给相应的底层后, 才将其丟弃。 在该情况下, 对于 包含 ECN标志位被设置为指示拥塞状态的数据包是否与丟弃定时器相关联, 或者与哪一个丟弃定时器相关联不作要求。
或者, 第一丟弃策略包括: 启动丟弃定时器, 但是, 如果在丟弃定时器超 时时, 数据包所对应的协议数据单元还未传输成功, 则不丟弃数据包, 直到数 据包对应的协议数据单元传输成功后, 才将其丟弃。 在该情况下, 对于包含 ECN 标志位被设置为指示拥塞的数据包与哪一个丟弃定时器相关联不作要 求。 例如, 包含 ECN标志位被设置为指示拥塞的数据包可以与第二定时器相 关联。在第二丟弃定时器超时时, 如果数据包对应的协议数据单元还未传输成 功, 则不丟弃数据包, 直到数据包对应的协议数据单元传输成功即成功传输到 对端后, 才将其丟弃。
或者, 第一丟弃策略包括: 启动第一丟弃定时器, 在第一丟弃定时器超时 时, 丟弃数据包, 其中, 第一丟弃定时器的定时时长大于第二丟弃定时器的定 时时长。
或者, 第一丟弃策略包括: 启动丟弃定时器, 在丟弃定时器超时时, 检测 数据包对应的协议数据单元是否已经递交给底层, 如果已经递交给底层, 则丟 弃该数据包; 否则, 等待该数据包对应的协议数据单元递交给底层后, 才丟弃 该数据包。 在该情况下, 对于所识别的满足预定条件的数据包例如包含 ECN 标志位被设置为指示拥塞状态的数据包是否与丟弃定时器相关联,或者与哪一 个丟弃定时器相关联不作要求。
或者, 第一丟弃策略包括: 不启动丟弃定时器, 直到该数据包对应的协议 数据单元递交给底层后, 才丟弃该数据包。
其中, 上述数据包传输成功后, 才将数据包丟弃可以包括: PDCP实体在 接收到底层实体传输成功的指示后, 才丟弃数据包; 或者 PDCP实体在接收到 来自对端的分组数据汇聚协议实体的接收成功确认后, 才丟弃数据包。 其中, 示例性地,在没有接收到来自对端的接收成功确认或来自底层的传输成功的指 示的情况下, 可以重新发送数据。 具体实现时, 可以在向对端发送数据包后, 针对所发送的数据包启动重传定时器, 如果在该定时器超时时,数据包所对应 的协议数据单元还未传输成功,例如仍然没有接收到来自对端的接收成功确认 或来自底层的传输成功的指示, 则重新发送该数据包。
这样, 通过对包含被设置为指示拥塞的 ECN标志位的数据包釆取特殊的 丟弃策略, 可以在一定程度上保证该类数据包能被可靠传输至对端。
本实施例中, 示例性地, PDCP实体检测到 SDU3中的 ECN标志位被设 置为指示拥塞, SDU1、 SDU2、 SDU4和 SDU5中均不包含被设置为指示拥塞 的 ECN标志位。 PDCP实体在接收到各 SDU时, 针对各 SDU分别启动相应 的第二丟弃定时器。如图 1 ,针对 SDU1至 SDU4的丟弃定时器均超时, PDCP 实体丟弃 SDU1、 SDU2和 SDU4, 并进一步指示下层丟弃 PDU1、 PDU2和 PDU4, PDCP实体不丟弃 SDU3 , 也不指示下层丟弃 PDU3 , 直至 PDCP实体 接收到底层实体已将该数据包传输成功的指示后, 才丟弃该数据包。
当然, 本实施例只是以检测出数据包中包含被设置为指示拥塞的 ECN标 志位为例进行了说明, 除了该指示信息外,还可以选择设置其它的指示信息来 对特定的数据包进行标识。 对于设置有其它指示信息的特定数据包, 同样的, PDCP实体可以通过对接收的数据包进行检测来进行识别。
在根据本发明另一实施例的用于无线通信的方法中, PDCP实体可以通过 检测所接收的数据包中是否包含预定的内容来确定数据包是否应釆取上述第 一丟弃策略。
以视频编码过程中产生的数据包为例来进行说明。在视频编码过程中, 一 般可以产生 3种类型的帧, 根据帧所包含的信息内容的不同, 可以分为 I帧、 P帧和 B帧; 其中, I帧为主要关键帧, 其所包含的视频信息最多, P帧为次 要关键帧, 其所包含的信息略少于 I帧, B帧为非关键帧, 其所包含的信息最 少, 起到增强视频质量的作用。
利用本实施例的方法来传输视频编码过程中产生的数据包时,用户设备侧 或网络侧的装置或者数据包传输路径上的其它设备的 PDCP 实体可以从上层 接收 IP数据包, 检测所接收的数据包, 并在接收到的数据包中包含 I帧的数 据或 I帧的部分数据时, 针对该数据包釆取第一丟弃策略, 否则, 针对该数据 包釆取第二丟弃策略。在另一示例中,也可以在数据包中包含 P帧的数据或者 包含 P帧的数据的一部分时, 针对该数据包釆取第一丟弃策略。 或者, 在又一 实施例中, 可以针对包含 I帧的数据或 I帧的部分数据的数据包以及包含 P帧 的数据或 P帧的部分数据的数据包均釆取第一丟弃策略。
在又一示例中, PDCP实体还可以检测数据包中是否包含视频中初始化分 段的数据或部分数据,并在数据包中包含视频中初始化分段的数据或部分数据 时, 针对该数据包釆取第一丟弃策略。
在具体实现中, 可以将上述不同的实施例进行组合。 示例性地, 可以将上 述数据包中包含特定帧类型的数据包和包含视频中初始化分段的数据或部分 数据结合起来进行考虑。 例如, PDCP实体通过检测数据包, 可以对包含 I帧 的数据或 I帧的部分数据的数据包和包含视频中初始化分段的数据或部分数据 的数据包均釆取第一丟弃策略; 而针对其它的数据包, 则釆取第二丟弃策略。
示例性地,还可以将上述包含被设置为指示拥塞的 ECN标志位的数据包、 包含特定帧类型的数据包和 /或包含视频中初始化分段的数据或部分数据结合 起来进行考虑。 例如, PDCP实体通过检测数据包, 可以对包含被设置为指示 拥塞的 ECN标志位的数据包、 包含 I帧的数据或 I帧的部分数据的数据包和 包含视频中初始化分段的数据或部分数据的数据包均釆取第一丟弃策略;而针 对其它的数据包, 则釆取第二丟弃策略。
图 2为在根据本发明又一实施例的用于无线通信的方法中, PDCP层的上 层将数据包传送至 PDCP层,以及 PDCP层将所接收的数据包传送至 PDCP层 的下层的示意图。 在该实施例中, PDCP的下层示例性地为 RLC层。
如图 2所示出的, PDCP层的上层的实体在传送数据包给 PDCP层时, 对 所传送的数据包是否为特定数据包进行了指示,例如对数据包是否需釆用上述 第一丟弃策略进行了指示。 PDCP层的 PDCP实体接收到数据包和对应的指示 后,根据该指示对所接收的数据包釆取相应的丟弃策略。例如,如果根据指示, 所接收的数据包为需釆取第一丟弃策略的特定数据包 ,则釆取上述第一丟弃策 略; 否则, 针对所接收的数据包釆取上述第二丟弃策略。
示例性地,上述指示所传送的数据包为特定数据包的指示可以是用于指示 数据包满足如下条件中的至少一项的指示:数据包中例如可以是数据包的包头 中包含被设置为指示拥塞的 ECN标志位; 数据包中包含显式拥塞通告接收确 认指示; 数据包中包含发送速率已降低的指示; 数据包中包含视频中 I帧的数 据或 I帧的部分数据; 数据包中包含视频中 P帧的数据或 P帧的部分数据; 数 据包中包含视频中初始化分段的数据或部分数据。
本领域的技术人员应当知道,上述指示还可以是用于指示数据包满足其它 预定条件的指示。
一个示例中, 可以利用第一指示信息来指示数据包为上述特定数据包, 而 利用第二指示信息来指示数据包不为上述特定数据包; 或者, 可以利用第一指 示信息来指示数据包为上述特定数据包,而对不是上述特定数据包的数据包不 进行指示。
示例性地, 向 PDCP层进行指示的方式有多种。 例如, 可以通过消息如层 间消息来进行指示, 或者利用数据包如其包头来设置指示信息。 示例性地, 可 以利用现有字段、 现有保留字段、 扩展新字段等方法来提供上述指示信息。 作 为一个例子, PDCP 层的上层实体可以在数据包中增加指示数据包内容的字 段, 例如当数据包中包含 I帧的数据或 I帧的部分数据时, 将数据包的该字段 设置为与指示数据包的该情况相对应;当数据包中包含 P帧的数据或 P帧的部 分数据时, 将数据包的该字段设置为与指示该数据包的该情况相对应; 当数据 包中包含 B 帧时, 将数据包的该字段设置为与指示数据包的该情况相对应。 当数据包中包含视频中初始化分段的数据或部分数据,将数据包的该字段设置 为与指示数据包的该情况相对应。 在本发明的另一个实施例中, PDCP层可以 无需对数据包进行检测,而是直接根据接收到的对数据包釆取第一丟弃策略的 指示对数据包釆取第一丟弃策略。在本发明的其它实施例中, 可以通过对数据 包进行检测来识别相应的指示信息。
在本发明的又一个实施例中, 可以由 RLC 层在接收到来自其上层例如 PDCP层的丟弃数据包的指示后, 对所接收的数据包是否为特定的数据包进行 检测。 如果检测出数据包为预先设定的特定数据包, 则 RLC层的 RLC实体不 丟弃该数据包; 否则, 如果该数据包不是特定的数据包, 并且该数据包所对应 的协议数据单元还没有被传输过, 则 RLC实体丟弃该数据包。
示例性地, RLC 层对所接收的数据包进行检测, 以确定所接收的数据包 是否为满足如下条件中的至少一项的特定数据包:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
数据包中包含视频中初始化分段的数据或部分数据。
但是, 本领域的技术人员应当理解, RLC 实体并不限于检测数据包是否 满足上述条件, 根据需要, RLC 实体检测数据包是否满足预先设定的任何条 件。
在本发明的另一个实施例中, PDCP层在将数据包传送给 RLC层时, 同 时对该数据包是否为特定数据包进行指示, RLC层的 RLC实体在接收到来自 PDCP层的丟弃数据包的指示后, 根据上述该数据包是否为特定数据包的指示 来确定是否丟弃数据包; 如果 PDCP层指示所传送的数据包为特定的数据包, 则 RLC层的 RLC实体不丟弃该数据包; 否则, 如果该数据包不是特定的数据 包, 并且该数据包还没有被传输过, 则 RLC实体丟弃该数据包。 其中, PDCP 层可以通过消息例如层间消息或者通过数据包如其包头来指示数据包是否为 特定的数据包, 示例性地, 可以利用现有字段、 现有保留字段、 扩展新字段等 方法来提供上述指示。
示例性地, PDCP层指示所传送的数据包是否为满足如下条件中的至少一 项的特定数据包:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
数据包中包含视频中初始化分段的数据或部分数据。
但是, 本领域的技术人员应当理解, PDCP层指示并不限于指示数据包是 否满足上述条件, 根据需要, PDCP层可以对数据包是否满足预先设定的任何 条件进行指示。
图 3 为利用本发明实施例的用于无线通信的方法在源基站与目标基站的 切换过程中, 从源基站如源演进型基站 ( eNodeB ) 的 PDCP层向目标基站如 目标演进型基站(eNodeB )的 PDCP层转发所接收的数据包的示意图。 其中, 以传送所接收的视频编码过程中产生的数据包为例进行说明。
该例中, 源基站的 PDCP实体在将数据包进行转发前,先对数据包是否为 预先设定的特定数据包进行识别,如果数据包是预先设定的特定数据包, 则将 数据包向目标基站转发; 否则, 不转发。 其中, 源基站的 PDCP实体可以通过 对所接收的数据包进行检测或者根据所接收的指示来识别上述特定数据包,识 别特定数据包的过程与上文所述的实施例相类似, 在此不再进行详述。
其中, 示例性但不作为限制地,预先设定的特定数据包可以是满足如下预 定条件中的一项的数据包:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据; 数据包中包含视频中 P帧的数据或 P帧的部分数据;
数据包中包含视频中初始化分段的数据或部分数据。
示例性地, 该例中, PDCP实体在将数据包进行转发前, 先识别数据包是 否为包含视频中 I帧或 P帧的数据或 I帧或 P帧的部分数据; 如是, 则转发; 否则, 不转发。
具体地, 如图 3 中所示出的, 源基站的 PDCP层从上层接收到的数据包 P1至 P8中, P1包含 P帧数据, P6包含 I帧数据。 源基站的 PDCP实体在识 别出 P1中包含 P帧数据、 P6中包含 I帧数据后, 只转发 P1和 P6, 而不转发 其它的数据包 P2至 P5以及 P7和 P8。
图 3 中示出了只转发满足预定的特定数据包的例子, 但是在其它的变形 中, 还可以优先转发所识别的特定数据包, 此时, P2至 P5、 P7和 P8也被转 发, 但是 P1和 P6被优先转发。
另外, 该例中, I帧或 P帧与 PDCP SDU的关系是一对一。 但是, 如本领 域技术人员所知道的, I帧或 P帧与 PDCP SDU的关系是一对多。
图 4 为利用本发明另一实施例的用于无线通信的方法在源基站与目标基 站的切换过程中,从源基站的 PDCP层向目标基站的 PDCP层转发所緩存的数 据包的示意图。 在该例中, 源基站的 PDCP实体在转发緩存的数据包之前, 可 以估计时延,所估计的时延估计包括将数据包从源基站转发到目标基站的转发 时延和 /或数据包从目标基站调度给 UE的目标空中调度时延。示例性地可以利 用 S1-U接口的转发信息或 X2接口的转发信息等来估计上述转发时延和目标 空中调度时延。 在估计完时延后, PDCP实体根据所估计的时延确定需转发的 数据包是否能在针对该数据包的丟弃定时器超时前到达目标基站或者调度给 用户设备 ( UE, User Equipment ), 或者是否能够在服务质量( QoS, Quality of Service ) 所要求的时延范围内到达目标基站或者调度给 UE; 如是, 则转发该 数据包; 否则, PDCP实体进一步识别该数据包是否为预定的特定数据; 如果 是预定的数据包, 则转发该预定的数据包; 否则, 不转发该数据包。 其中, 与上文所述实施例相类似的, PDCP实体可以通过对数据包进行检 测或根据所接收的指示来确定数据包是否为预定的特定数据包。 示例性地,
PDCP 实体可以通过对数据包进行检测或根据所接收的指示来确定数据包是 否为满足预定条件的数据包,例如确定数据包是否为满足上文所述的预定条件 中的至少一项的数据包。 该例中, 以特定数据包为包含 I帧或 P帧数据或者 I 帧或 P帧的部分数据的数据包为例来进行说明。
如图 4所示出的, 该例中, PDCP实体判断出数据包 P1至 P6不能在与
P2至 P5相对应的丟弃定时器超时前到达目标基站, P7和 P8能够在针对其的 相对应的丟弃定时器超时前到达目标基站; 并且, PDCP实体识别出 P1为包 含 P帧数据的数据包, 以及 P6为包含 I帧数据的数据包; 所以, 最后源基站 的 PDCP实体不转发 P2至 P5 , 转发 Pl、 P6、 P7和 P8。 并且, 在转发的数据 中, 可以优先转发包含 I帧数据或 P帧数据的 P1和 P6。
本领域的技术人员应当理解,本实施例中识别数据包是否为特定数据包的 步骤和估计时延并判断数据包能否在丟弃定时器超时或 Qos 所要求的时延规 定范围内到达目标基站的步骤之间并不限于上述的顺序。在其它变形中, 也可 以先识别数据包是否为具有特定特征的特定数据包。
如图 5所示出的,本发明实施例提供一种用于无线通信的装置 500,包括: 识别模块 501 , 用于识别所接收的数据包中满足预定条件的数据包; 处理模块 502, 用于针对所识别的数据包釆取第一丟弃策略; 其中, 所述第一丟弃策略 为:针对所识别的数据包釆用第一丟弃定时器,在所述第一丟弃定时器超时时, 丟弃所识别的数据包; 其中, 与针对不满足所述预定条件的数据包所釆用的第 二丟弃定时器相比,所述第一丟弃定时器的定时时长大于所述第二丟弃定时器 的定时时长; 或者, 所述第一丟弃策略为: 直到所识别的数据包所对应的协议 数据单元传输成功或直到所识别的数据包对应的协议数据单元已经被递交给 相应的底层后, 才将所识别的数据包丟弃。
本领域的技术人员可以理解, 示例性但不作为限制的, 可以在分组数据汇 聚协议实体或者在实现分组数据汇聚协议层功能的其它实体中实现上述识别 模块和处理模块。
在本发明实施例的装置中, 所述预定条件可以包括如下条件中的至少一 项: 接收到对该数据包釆用第一丟弃策略的指示; 数据包中包含用于指示拥塞 的显式拥塞通告指示; 数据包中包含显式拥塞通告接收确认指示; 数据包中包 含发送速率已降低的指示; 数据包中包含视频中 I帧的数据或 I帧的部分数 据;数据包中包含视频中 P帧的数据或 P帧的部分数据;数据包中包含视频中 初始化分段的数据或初始化分段的部分数据。
在本发明实施例的装置中,所述识别模块进一步通过对所接收的数据包进 行检测或者根据所接收的指示来识别满足预定条件的数据包。
在本发明实施例的装置中,所述直到所识别的数据包所对应的协议数据单 元传输成功后, 才将所识别的数据包丟弃包括: 针对所识别的数据包, 不启动 丟弃定时器, 直到所识别的数据包所对应的协议数据单元传输成功后, 才将所 识别的数据包丟弃; 或者, 针对所识别的数据包, 启动丟弃定时器, 如果在针 对所识别的数据包的丟弃定时器超时时,所识别的数据包所对应的协议数据单 元还未传输成功,则不丟弃所识别的数据包,直到所识别的数据包传输成功后, 才将所识别的数据包丟弃。
在本发明实施例的装置中,所述所识别的数据包所对应的协议数据单元传 输成功包括: 接收到来自底层的传输成功的指示; 或者接收到来自对端的分组 数据汇聚协议实体的接收成功确认。
在本发明实施例的装置中,所述直到所识别的数据包所对应的协议数据单 元传输成功后, 才将所识别的数据包丟弃包括:
在发送所识别的数据包后,针对所发送的数据包启动重传定时器,如果在 所述重传定时器到期前所述所识别的数据包所对应的协议数据单元还未传输 成功, 则重新发送所述所识别的数据包。
在本发明实施例的装置中,所述直到所识别的数据包所对应的协议数据单 元已经被递交给相应的底层后, 才将所识别的数据包丟弃包括: 针对所识别的 数据包, 不启动丟弃定时器, 直到所识别的数据包所对应的协议数据单元已经 递交给所述底层后, 才将所识别的数据包丟弃; 或者, 针对所识别的数据包, 启动丟弃定时器, 并且, 如果在针对所识别的数据包的丟弃定时器超时时, 所 识别的数据包对应的协议数据单元还未被递交到所述底层,则不丟弃所识别的 数据包, 直到所识别的数据包所对应的协议数据单元已经被递交到所述底层 后, 才将所识别的数据包丟弃。
如图 6所示出的, 本发明实施例还提供一种用于无线通信的装置 600, 包 括:接收模块 601 ,用于接收上层发送的数据包和针对所述数据包的丟弃指示; 识别模块 602, 用于识别所述接收模块所接收的数据包是否为满足预定条件的 数据包; 处理模块 603, 用于在所述接收模块所接收的数据包为满足预定条件 的数据包时, 不丟弃所述数据包; 在所述接收模块所接收的数据包不为满足预 丟弃所述数据包。
本领域的技术人员可以理解, 示例性但不作为限制的, 该实施例的接收模 块、识别模块和处理模块可以在无线链路控制层实体或者能实现无线链路控制 层功能的其它实体中实现。
在本发明实施例的装置中, 所述预先设定的条件包括如下中的一项: 数据 包中包含用于指示拥塞的显式拥塞通告指示;数据包中包含显式拥塞通告接收 确认指示; 数据包中包含发送速率已降低的指示; 数据包中包含视频中 I帧的 数据或 I帧的部分数据; 数据包中包含视频中 P帧的数据或 P帧的部分数据; 在本发明实施例的装置中,所述识别模块通过对所接收的数据包进行检测 或者根据所接收的指示来识别数据包是否满足预定条件。
如图 7所示出的, 本发明实施例还提供一种基站 700, 包括: 第一处理模 块 701 , 用于识别要转发的数据包中满足预定条件的数据包; 第二处理模块 702, 用于只向目标基站转发所识别的数据包或者优先向所述目标基站转发所 识别的数据包。
在本发明实施例的基站中, 所述预先设定的条件包括如下中的一项: 数据 包中包含用于指示拥塞的显式拥塞通告指示;数据包中包含显式拥塞通告接收 确认指示; 数据包中包含发送速率已降低的指示; 数据包中包含视频中 I帧的 数据或 I帧的部分数据; 数据包中包含视频中 P帧的数据或 P帧的部分数据; 如图 8所示出的,本发明实施例还提供一种基站 800,包括:估计模块 801 , 用于估计转发时延和目标空中调度时延中的至少一项; 转发模块 802, 用于根 据所估计的时延,如果要转发的数据包能够在针对该数据包的丟弃定时器超时 前到达目标基站或调度给用户设备,或者如果要转发的数据包不能在针对该数 据包的丟弃定时器超时前到达目标基站或调度给用户设备,但是所述数据包为 满足预定条件的数据包, 则转发所述数据包; 否则, 不转发所述数据包。
在本发明实施例的基站中, 所述预定条件包括如下中的一项: 数据包中包 含用于示拥塞的显式拥塞通告标识; 数据包中包含显式拥塞通告接收确认指 示; 数据包中包含发送速率已降低的指示; 数据包中包含视频中 I帧的数据或 I帧的部分数据; 数据包中包含视频中 P帧的数据或 P帧的部分数据; 数据包 本领域技术人员应当理解,装置所包括的各个实体或模块,可以利用软件、 硬件或者软硬件结合的方式来实现。
本领域技术人员应当理解, 本发明的各个实施例所公开的方法和装置, 可 以在不偏离发明实质的情况下做出各种变形和改变,这些变形和改变都应当落 入在本发明的保护范围之内。 因此, 本发明的保护范围由所附的权利要求书来 定义。

Claims

权 利 要 求
1、 一种用于无线通信的方法, 其特征在于, 包括:
识别所接收的数据包中满足预定条件的数据包;
针对所识别的数据包釆取第一丟弃策略;
其中,所述第一丟弃策略包括:针对所识别的数据包釆用第一丟弃定时器, 在所述第一丟弃定时器超时时, 丟弃所识别的数据包; 其中, 与针对不满足所 述预定条件的数据包所釆用的第二丟弃定时器相比,所述第一丟弃定时器的定 时时长大于所述第二丟弃定时器的定时时长; 或者, 所述第一丟弃策略包括: 直到所识别的数据包所对应的协议数据单元传输成功或直到所识别的数据包 对应的协议数据单元已经被递交给相应的底层后, 才将所识别的数据包丟弃。
2、 根据权利要求 1所述的方法, 其特征在于, 所述预定条件包括如下条 件中的至少一项:
接收到对该数据包釆用第一丟弃策略的指示;
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
3、 根据权利要求 2所述的方法, 其特征在于, 所述识别所接收的数据包 中满足预定条件的数据包包括:
通过对所接收的数据包进行检测或者根据所接收的指示来识别满足所述 预定条件的数据包。
4、 根据权利要求 1所述的方法, 其特征在于, 所述直到所识别的数据包 所对应的协议数据单元传输成功后, 才将所识别的数据包丟弃包括:
针对所识别的数据包, 不启动丟弃定时器, 直到所识别的数据包对应的协 议数据单元传输成功后, 才将所识别的数据包丟弃; 或者,
针对所识别的数据包, 启动丟弃定时器, 并且, 如果在针对所识别的数据 包的丟弃定时器超时时, 所识别的数据包对应的协议数据单元还未传输成功, 则不丟弃所识别的数据包,直到所识别的数据包对应的协议数据单元传输成功 后, 才将所识别的数据包丟弃。
5、 根据权利要求 4所述的方法, 其特征在于, 所述所识别的数据包所对 应的协议数据单元传输成功包括:
接收到来自所述底层的传输成功的指示; 或者
接收到来自对端的接收成功确认。
6、 根据权利要求 1所述的方法, 其特征在于, 直到所识别的数据包所对 应的协议数据单元传输成功后, 才将所识别的数据包丟弃包括:
在发送所识别的数据包后,针对所发送的数据包启动重传定时器,如果在 所述重传定时器到期前所述所识别的数据包所对应的协议数据单元还未传输 成功, 则重新发送所述所识别的数据包。
7、 根据权利要求 1所述的方法, 其特征在于, 直到所识别的数据包所对 应的协议数据单元已经被递交给相应的底层后, 才将所识别的数据包丟弃包 括:
针对所识别的数据包, 不启动丟弃定时器, 直到所识别的数据包所对应的 协议数据单元已经递交给所述底层后, 才将所识别的数据包丟弃; 或者, 针对所识别的数据包, 启动丟弃定时器, 并且, 如果在针对所识别的数据 包的丟弃定时器超时时,所识别的数据包所对应的协议数据单元还未被递交到 所述底层, 则不丟弃所识别的数据包, 直到所识别的数据包所对应的协议数据 单元已经被递交到所述底层后, 才将所识别的数据包丟弃。
8、 一种用于无线通信的方法, 其特征在于, 包括:
接收上层发送的数据包和针对所述数据包的丟弃指示;
如果所接收的数据包为满足预定条件的数据包, 则不丟弃所述数据包; 否 则,如果所述数据包不为满足预定条件的数据包, 并且所述数据包对应的协议 数据单元还没有被传输过, 则丟弃所述数据包。
9、 根据权利要求 8所述的方法, 其特征在于, 所述预先设定的条件包括 如下中的一项:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
10、 根据权利要求 8或 9所述的方法, 其特征在于, 通过对所接收的数据 包进行检测或者根据所接收的指示来识别数据包是否满足所述预定条件。
11、 一种用于无线通信的方法, 应用于切换过程, 其特征在于, 包括: 源基站识别要转发的数据包中满足预定条件的数据包;
所述源基站只向目标基站转发所识别的数据包或者所述源基站优先向所 述目标基站转发所识别的数据包。
12、 根据权利要求 11所述的方法, 其特征在于, 所述预先设定的条件包 括如下中的一项:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
f部分数据。
13、 一种用于无线通信的方法, 应用于切换过程, 其特征在于, 包括: 源基站估计转发时延和目标空中调度时延中的至少一项;
根据所估计的时延,如果要转发的数据包能够在针对该数据包的丟弃定时 器超时前到达目标基站或调度给用户设备,或者如果要转发的数据包不能在针 对该数据包的丟弃定时器超时前到达目标基站或调度给用户设备,但是所述数 据包为满足预定条件的数据包,则转发所述数据包;否则,不转发所述数据包。
14、 根据权利要求 13所述的方法, 其特征在于, 所述预定条件包括如下 中的一项:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示; 数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
f部分数据(
15、 一种用于无线通信的装置, 其特征在于, 包括:
识别模块, 用于识别所接收的数据包中满足预定条件的数据包;
处理模块, 用于针对所识别的数据包釆取第一丟弃策略;
其中,所述第一丟弃策略包括:针对所识别的数据包釆用第一丟弃定时器, 在所述第一丟弃定时器超时时, 丟弃所识别的数据包; 其中, 与针对不满足所 述预定条件的数据包所釆用的第二丟弃定时器相比,所述第一丟弃定时器的定 时时长大于所述第二丟弃定时器的定时时长; 或者, 所述第一丟弃策略包括: 直到所识别的数据包所对应的协议数据单元传输成功或直到所识别的数据包 对应的协议数据单元已经被递交给相应的底层后, 才将所识别的数据包丟弃。
16、 根据权利要求 15所述的装置, 其特征在于, 所述预定条件包括如下 条件中的至少一项:
接收到对该数据包釆用第一丟弃策略的指示;
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
f部分数据。
17、 根据权利要求 16所述的装置, 其特征在于, 所述识别模块进一步通 过对所接收的数据包进行检测或者根据所接收的指示来识别满足所述预定条 件的数据包。
18、 根据权利要求 15所述的装置, 其特征在于, 所述直到所识别的数据 包所对应的协议数据单元传输成功后, 才将所识别的数据包丟弃包括:
针对所识别的数据包, 不启动丟弃定时器, 直到所识别的数据包所对应的 协议数据单元传输成功后, 才将所识别的数据包丟弃; 或者,
针对所识别的数据包, 启动丟弃定时器,如果在针对所识别的数据包的丟 弃定时器超时时, 所识别的数据包所对应的协议数据单元还未传输成功, 则不 丟弃所识别的数据包, 直到所识别的数据包对应的协议数据单元传输成功后 , 才将所识别的数据包丟弃。
19、 根据权利要求 18所述的装置, 其特征在于, 所述所识别的数据包所 对应的协议数据单元传输成功包括:
接收到来自所述底层的传输成功的指示; 或者
接收到来自对端的分组数据汇聚协议实体的接收成功确认。
20、 根据权利要求 15所述的装置, 其特征在于, 直到所识别的数据包所 对应的协议数据单元传输成功后, 才将所识别的数据包丟弃包括:
在发送所识别的数据包后,针对所发送的数据包启动重传定时器,如果在 所述重传定时器到期前所述所识别的数据包所对应的协议数据单元还未传输 成功, 则重新发送所述所识别的数据包。
21、 根据权利要求 15所述的装置, 其特征在于, 直到所识别的数据包所 对应的协议数据单元已经被递交给相应的底层后,才将所识别的数据包丟弃包 括:
针对所识别的数据包, 不启动丟弃定时器, 直到所识别的数据包所对应的 协议数据单元已经递交给所述底层后, 才将所识别的数据包丟弃; 或者, 针对所识别的数据包, 启动丟弃定时器, 并且, 如果在针对所识别的数据 包的丟弃定时器超时时,所识别的数据包对应的协议数据单元还未被递交到所 述底层, 则不丟弃所识别的数据包, 直到所识别的数据包所对应的协议数据单 元已经被递交到所述底层后, 才将所识别的数据包丟弃。
22、 一种用于无线通信的装置, 其特征在于, 包括:
接收模块, 用于接收上层发送的数据包和针对所述数据包的丟弃指示; 识别模块,用于识别所述接收模块所接收的数据包是否为满足预定条件的 数据包;
处理模块,用于在所述接收模块所接收的数据包为满足预定条件的数据包 时, 不丟弃所述数据包; 在所述接收模块所接收的数据包不为满足预定条件的
Figure imgf000027_0001
23、 根据权利要求 22所述的装置, 其特征在于, 所述预先设定的条件包 括如下中的一项:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
24、 根据权利要求 22或 23所述的装置, 其特征在于, 所述识别模块通过 对所接收的数据包进行检测或者根据所接收的指示来识别数据包是否满足所 述预定条件。
25、 一种基站, 其特征在于, 包括:
第一处理模块, 用于识别要转发的数据包中满足预定条件的数据包; 第二处理模块,用于只向目标基站转发所识别的数据包或者优先向所述目 标基站转发所识别的数据包。
26、 根据权利要求 25所述的基站, 其特征在于, 所述预先设定的条件包 括如下中的一项:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
f部分数据。
27、 一种基站, 其特征在于, 包括:
估计模块, 用于估计转发时延和目标空中调度时延中的至少一项; 转发模块, 用于根据所估计的时延,如果要转发的数据包能够在针对该数 据包的丟弃定时器超时前到达目标基站或调度给用户设备,或者如果要转发的 数据包不能在针对该数据包的丟弃定时器超时前到达目标基站或调度给用户 设备, 但是所述数据包为满足预定条件的数据包, 则转发所述数据包; 否则, 不转发所述数据包。
28、 根据权利要求 27所述的基站, 其特征在于, 所述预定条件包括如下 中的一项:
数据包中包含用于指示拥塞的显式拥塞通告指示;
数据包中包含显式拥塞通告接收确认指示;
数据包中包含发送速率已降低的指示;
数据包中包含视频中 I帧的数据或 I帧的部分数据;
数据包中包含视频中 P帧的数据或 P帧的部分数据;
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104254106A (zh) * 2013-06-29 2014-12-31 华为终端有限公司 无线接入网络ran拥塞处理方法及装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108616925B (zh) * 2016-12-13 2023-03-21 中兴通讯股份有限公司 一种数据流的处理方法及装置
WO2019019025A1 (zh) * 2017-07-25 2019-01-31 北京小米移动软件有限公司 一种数据包丢弃方法、装置和系统
CN108848532B (zh) * 2018-06-06 2022-01-28 Oppo广东移动通信有限公司 一种数据传输优化方法、装置及计算机存储介质
WO2021016790A1 (zh) * 2019-07-29 2021-02-04 Oppo广东移动通信有限公司 无线通信的方法、终端设备和网络设备
CN113467979A (zh) * 2020-03-30 2021-10-01 华为技术有限公司 一种数据递交方法及装置
CN113923713A (zh) * 2020-07-09 2022-01-11 维沃移动通信有限公司 数据处理的方法及装置
CN115996420A (zh) * 2021-10-19 2023-04-21 维沃移动通信有限公司 数据处理方法、装置及终端
CN114640725B (zh) * 2022-05-08 2022-09-27 荣耀终端有限公司 数据传输方法及电子设备
CN117640531A (zh) * 2022-08-16 2024-03-01 中国电信股份有限公司 数据传输方法、装置、pdcp、基站以及存储介质
CN118175582A (zh) * 2022-12-09 2024-06-11 维沃移动通信有限公司 数据包处理方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1463166A (zh) * 2002-05-28 2003-12-24 株式会社Ntt都科摩 数据包传输方法及通信系统
WO2009086679A1 (zh) * 2007-12-29 2009-07-16 Zte Corporation 无线链路控制实体的复位控制方法
CN101843057A (zh) * 2007-10-30 2010-09-22 高通股份有限公司 服务数据单元丢弃计时器
CN101965705A (zh) * 2007-10-01 2011-02-02 交互数字专利控股公司 用于pcdp丢弃的方法和装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101194449A (zh) * 2005-04-11 2008-06-04 诺基亚公司 用于语音动态时间偏离的方法和装置
US8339944B2 (en) * 2007-11-05 2012-12-25 Qualcomm Incorporated SDU discard mechanisms for wireless communication systems
CN101483505B (zh) * 2008-01-08 2013-02-27 中兴通讯股份有限公司 一种服务数据单元丢弃方法
CN101527674B (zh) * 2008-03-04 2011-04-27 中国移动通信集团公司 一种数据处理的方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1463166A (zh) * 2002-05-28 2003-12-24 株式会社Ntt都科摩 数据包传输方法及通信系统
CN101965705A (zh) * 2007-10-01 2011-02-02 交互数字专利控股公司 用于pcdp丢弃的方法和装置
CN101843057A (zh) * 2007-10-30 2010-09-22 高通股份有限公司 服务数据单元丢弃计时器
WO2009086679A1 (zh) * 2007-12-29 2009-07-16 Zte Corporation 无线链路控制实体的复位控制方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104254106A (zh) * 2013-06-29 2014-12-31 华为终端有限公司 无线接入网络ran拥塞处理方法及装置

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