WO2015018078A1 - 一种用于帧确认的方法和装置 - Google Patents

一种用于帧确认的方法和装置 Download PDF

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Publication number
WO2015018078A1
WO2015018078A1 PCT/CN2013/081214 CN2013081214W WO2015018078A1 WO 2015018078 A1 WO2015018078 A1 WO 2015018078A1 CN 2013081214 W CN2013081214 W CN 2013081214W WO 2015018078 A1 WO2015018078 A1 WO 2015018078A1
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Prior art keywords
resource
downlink
frame
uplink
channel
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PCT/CN2013/081214
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English (en)
French (fr)
Inventor
刘慎发
鲍东山
Original Assignee
北京新岸线移动多媒体技术有限公司
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Application filed by 北京新岸线移动多媒体技术有限公司 filed Critical 北京新岸线移动多媒体技术有限公司
Priority to EP13890897.5A priority Critical patent/EP3032900B1/en
Priority to DK13890897.5T priority patent/DK3032900T3/da
Priority to PCT/CN2013/081214 priority patent/WO2015018078A1/zh
Priority to US14/910,870 priority patent/US10027443B2/en
Priority to CN201380078605.6A priority patent/CN105594271A/zh
Publication of WO2015018078A1 publication Critical patent/WO2015018078A1/zh

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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
    • H04L1/1607Details of the supervisory signal
    • H04L1/1621Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • 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
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention belongs to the field of wireless communications, and in particular, to a method and apparatus for frame confirmation.
  • the IEEE 802.11 system is a content-based system, and the strategy of using instant response (ack) is simple and effective.
  • IEEE 802.11 a/b/g widely adopts the ack strategy, that is, when a station receives a unicast frame (such as a DATA frame), it immediately feeds back an ACK frame for confirmation.
  • the ⁇ Block ACK mechanism is used to jointly acknowledge a batch of data packets, thereby improving efficiency.
  • the HT immediate block ack strategy is an efficient Block ack mechanism for HT sites, that is, when an HT station sends a batch of aggregated frames and its ack policy bit is set to normal ack. At the time, the default type is confirmed by default.
  • IEEE 802.11 ⁇ also defines a delay-type ack strategy. If a delayed ACK is used, the transmission delay of the packet will increase, which is not conducive to the transmission of delay-sensitive services.
  • HARQ-ack hybrid automatic repeat request
  • the HARQ mechanism is to confirm the physical resource block, and the timeliness and effectiveness are guaranteed, but it inevitably brings the complexity of the implementation, and the reliability is also compared with the MAC-level ACK mechanism of the IEEE 802.11 system. Great discount.
  • the downlink HARQ mechanism of the LTE system is briefly described as follows.
  • the downlink channel of the system includes a control signal, a reference signal, and a data signal.
  • the downlink shared channel (PDSCH) transmits the downlink data signal, and the downlink control signaling (PDCCH) transmits the data transmission scheduling result.
  • the uplink signal also includes a control signal and a data signal.
  • the uplink control channel (PUSCH) can be used to transmit uplink control signals, including ACK/NACK, CQI indication, and the like.
  • the HARQ-ack mechanism in the LTE system confirms the physical subframe, and the RLC layer of the LTE system needs to perform relatively complex segmentation and reassembly to ensure that the transport layer (TB) of the physical layer is adapted.
  • the H-ARQ strategy is also added, and more complicated segmentation is required to form the HARQ sub-packet, and the H-ARQ is confirmed for the HARQ sub-packet.
  • HARQ leads to lower system reliability and higher implementation complexity, and the effectiveness is improved.
  • the MAC layer of the 802.1 6 system uses the optional ARQ policy. However, because the ACK is used as the uplink data frame, the acknowledgment is low, the delay is large, and the implementation complexity is low.
  • the ARQ function of the MAC layer of the 802.1 6 system is optional.
  • the scheduling of the ACK is not instantaneous, and the scheduling complexity is relatively high.
  • its ARQ requires ARQ-BLOCK to be acknowledged, and the ARQ-BLOCK sub-packet needs to be split, resulting in lower frame validation efficiency.
  • Another object of the present invention is to provide a method and apparatus for frame confirmation.
  • a brief summary is given below. This generalization is not a general comment, nor is it intended to identify key/critical constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in the form of a Another object of the present invention is to provide a method for frame acknowledgment, including: allocating feedback resources in an uplink of the physical frame after scheduling and resource allocation of downlink service data; or scheduling of uplink service data After the resource allocation is completed, the feedback resource is allocated in the downlink of the next frame, and is used to send a group acknowledgement response Group ACK;
  • the feedback resource control signaling is used to indicate the allocation of the feedback resource
  • the feedback resource control signaling is sent on a control channel of the physical frame.
  • the feedback resource is: a transmission channel resource, or a short signaling channel resource.
  • the downlink scheduled channel user is allocated for the Nth frame, and the corresponding uplink transmission channel resource is allocated in the uplink of the Nth frame.
  • An uplink short signaling channel resource configured to send a group acknowledgement response Group ACK of the MAC layer;
  • the feedback resource control signaling is sent on the control channel of the Nth frame.
  • the method further includes:
  • the downlink scheduled user demodulates the control channel in the Nth frame to obtain corresponding downlink transmission resource indication signaling information and feedback resource control signaling information.
  • the feedback resource is: uplink transmission channel resource or uplink short signaling. Channel resources.
  • the method further includes:
  • the user After receiving one or more MAC packet MPDUs in the corresponding downlink transmission resource, the user generates an acknowledgement response of one or more MPDUs, and encapsulates the group acknowledgement response Group ACK of the MAC layer, and the uplink transport channel of the Nth frame. Or sent to the CAP in the uplink short signaling channel.
  • the method further includes:
  • the user scheduled for the uplink of the Nth frame allocates the corresponding downlink transmission channel resource or downlink short signaling channel resource in the downlink of the N+1th frame,
  • the group acknowledgement response Group ACK is sent at the MAC layer;
  • the feedback resource control signaling is sent on the control channel of the (N+1)th frame.
  • the method further includes:
  • the uplink scheduled user demodulates the control channel in the Nth frame to obtain the indication signaling information of the corresponding uplink transport channel resource, and demodulates the control channel in the N+1th frame to obtain corresponding feedback resource control signaling.
  • the feedback resource is: a downlink transport channel resource or a downlink short signaling channel resource.
  • the method further includes:
  • the CAP After receiving the one or more MAC packet MPDUs in the corresponding uplink transport channel resource in the Nth frame, the CAP generates an acknowledgement response of one or more MPDUs, and encapsulates the group acknowledgement response group ACK of the MAC layer, at the N+th
  • the downlink transmission channel or the downlink short signaling channel of one frame is transmitted.
  • control channel can indicate a feedback resource allocation of a downlink transport channel or a downlink short signaling channel of the current frame corresponding to the uplink scheduled user of the previous frame, and is used for the CAP sending group acknowledgement response Group ACK. And/or, indicating a feedback resource allocation of an uplink transmission channel or an uplink short signaling channel of a user scheduled to downlink in the current frame, for the STA to send a group acknowledgement response Group ACK.
  • Another object of the present invention is to provide an apparatus for frame confirmation, comprising: An allocation module, configured to allocate a feedback resource in an uplink of the physical frame after the scheduling and resource allocation of the downlink service data is completed; or, to allocate feedback in a downlink of the next frame after the scheduling and resource allocation of the uplink service data is completed. Resource, to send a group confirmation response Group ACK;
  • An encapsulating module configured to encapsulate, according to the allocated feedback resource, a corresponding feedback resource control signaling, where the feedback resource control signaling is used to indicate allocation of a feedback resource;
  • a sending module configured to send the feedback resource control signaling on a control channel of the physical frame.
  • the feedback resource is: a transmission channel resource, or a short signaling channel resource.
  • the allocating module is specifically configured to: after the scheduling and resource allocation of the downlink service data in the Nth frame, the downlink scheduled user in the Nth frame, in the uplink of the Nth frame, Allocating a corresponding uplink transport channel resource or uplink short signaling channel resource for transmitting a group acknowledgement group ACK of the MAC layer;
  • the encapsulating module is specifically configured to encapsulate corresponding feedback resource control signaling according to the allocated uplink transport channel resource or the uplink short signaling channel resource;
  • the sending module is specifically configured to send the feedback resource control signaling on a control channel of the Nth frame.
  • the allocation module is further configured to: after the scheduling and resource allocation of the uplink service data in the Nth frame, allocate the corresponding downlink transmission channel resource in the downlink of the N+1 frame for the uplink scheduled user in the Nth frame. Or a downlink short signaling channel resource, configured to send a group acknowledgement response Group ACK;
  • the encapsulating module is further configured to encapsulate corresponding feedback resource control signaling according to the allocated downlink transport channel resource or the downlink short signaling channel resource;
  • the sending module is specifically configured to send the feedback resource control signaling on a control channel of the (N+1)th frame.
  • the method further includes:
  • a generating module configured to generate one or more MPDU acknowledgment responses after receiving one or more MAC layer packet MPDUs in the corresponding uplink transport channel resources, and encapsulate the group acknowledgment group ACK of the MAC layer;
  • a second sending module configured to send the Group ACK in a downlink transport channel or a downlink short signaling channel of the (N+1)th frame.
  • control channel can indicate the resource allocation of the downlink transport channel or the downlink short signaling channel of the current frame corresponding to the uplink scheduled user of the previous frame, and is used for the CAP sending group acknowledgement response Group ACK; And/or, indicating resource allocation of an uplink transmission channel or an uplink short signaling channel of a user scheduled to be downlinked in the current frame, for the STA to send a Group ACK.
  • Another object of the present invention is to provide an apparatus for frame confirmation, comprising:
  • a receiving module configured to receive a downlink physical frame
  • the demodulation module is configured to demodulate the control channel of the physical frame, and obtain corresponding downlink transmission resource indication signaling information and feedback resource control signaling information.
  • the feedback resource is: an uplink transport channel resource or an uplink short signaling channel resource.
  • the method further includes:
  • a generating module configured to generate an acknowledgment response of one or more MPDUs after receiving one or more MAC layer packet MPDUs in the corresponding downlink transmission resource, and encapsulate the group acknowledgement response Group ACK of the MAC layer;
  • a sending module configured to send the group in an uplink transport channel or an uplink short signaling channel of the current frame ACK.
  • Another object of the present invention is to provide an apparatus for frame confirmation, comprising:
  • a receiving module configured to receive a downlink physical frame
  • the demodulation module is configured to demodulate the control channel of the physical frame to obtain corresponding uplink transmission resource indication signaling information, and is also used to demodulate the control channel of the next frame to obtain corresponding feedback resource control signaling. information.
  • the feedback resource is: a downlink transport channel resource or a downlink short signaling channel resource.
  • group aggregation frame G-MPDU rarely contains fragmentation, which makes the use of fragmentation less.
  • resource scheduling mode to achieve ACK transmission configure the uplink and downlink channels, from the perspective of timing, configure the short signaling channel to the front, the scheduling is transmitted in the signaling feedback channel, so that the ACK is received at the time of transmission and reception, the delay is small, the response Fast, conducive to the scheduling of resource scheduling and retransmission.
  • FIG. 1 is a schematic diagram of a system architecture of a newly defined medium and short range wireless communication system
  • FIG. 2 is a schematic diagram of another frame structure provided by an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a G-MPDU
  • FIG. 4 is a schematic structural diagram of a G-MPDU
  • FIG. 5 is a schematic flowchart of a method for frame acknowledgment according to Embodiment 1 of the present invention
  • FIG. 6 is a schematic diagram of a system frame structure of an uplink and downlink scheduling transmission process according to Embodiments 2 to 4 of the present invention
  • Embodiment 7 is a schematic diagram of another frame structure provided by Embodiment 5 of the present invention.
  • FIG. 8 is a schematic diagram of a system frame structure of an uplink and downlink scheduling transmission process provided by Embodiments 6 to 9 of the present invention.
  • Embodiment 10 of the present invention is a schematic diagram of an apparatus for frame acknowledgement according to Embodiment 10 of the present invention.
  • FIG. 10 is a schematic diagram of another apparatus for frame acknowledgement according to Embodiment 10 of the present invention.
  • FIG. 11 is a schematic diagram of another apparatus for frame acknowledgment according to Embodiment 11 of the present invention
  • FIG. 12 is a schematic diagram of another apparatus for frame acknowledgment according to Embodiment 12 of the present invention.
  • the embodiment of the present invention is implemented based on a wireless communication system.
  • the system has the following features: the physical frame structure is divided into downlink and uplink frame periods, and the uplink and downlink frame periods include a data transmission channel and a signaling channel.
  • the wireless communication system requires centralized scheduling, and the resources of the downlink frame period and the uplink frame period need to be centrally scheduled and allocated by the CAP.
  • Fig. 1 the figure shows the PHY layer frame structure of the newly defined medium and short range wireless communication system, and the frame structure is as shown in Fig. 2.
  • the definition of each subchannel in the frame structure is shown in Table 1.
  • the MAC PDUs in the system do not have to be complexly sliced and cut, and the formed G-MPDUs can be directly transmitted in the DL-TCH and UL-TCH in the physical frame structure, as shown in FIGS. 3 and 4.
  • ACK is usually scheduled to be transmitted in DL-TCH and UL-TCH, or scheduled to be transmitted in the short signaling channel in front of the transmission channel.
  • When transmitting in the transmission channel it can be combined with ordinary data frames to form a G-MPDU.
  • the above G-MPDU is for explaining data frames.
  • a MAC-level, universal immediate ACK strategy is proposed, thereby achieving low latency and high reliability with minimum complexity. confirm.
  • the method for frame confirmation provided by the embodiment of the present invention is applicable to both a management frame and a data frame. After the sender sends the frame, the receiver immediately returns an acknowledgment response to inform the sender whether the data is successfully received, so that the data transmission success can be effectively monitored.
  • a central access point is an entity that provides access services for an accessed STA; a STA is a terminal that has a media access control (MAC) and a physical layer (PHY) functional interface and can communicate with the CAP. device.
  • the CAP communicates with the STA through a physical frame, and each physical frame period includes a downlink period and an uplink period in sequence: the CAP sends data to the STA in a downlink period; the STA sends data to the CAP in an uplink period.
  • system resources are allocated and scheduled by the CAP, and the scheduling result is broadcast to the user through the resource allocation control signaling CCH.
  • the downlink scheduling of the CAP mainly completes resource allocation in the downlink frame period, including: resource allocation of the DL-TCH service and generation of CCH control signaling.
  • the uplink scheduling mainly completes resource allocation in the uplink frame period, including: resource allocation of the UL-TCH service and generation of CCH control signaling.
  • the instant type ACK method proposed in the embodiment of the present invention is implemented by scheduling and generating corresponding CCH control signaling by the system.
  • the uplink and downlink scheduling result information of the Nth frame needs to be prepared in advance before the Nth physical frame transmission.
  • a first embodiment of the present invention provides a method for frame acknowledgment.
  • the method includes: Step S101: After the scheduling of the downlink service data and the resource allocation are completed, the feedback resource is allocated in the uplink of the physical frame; or After the scheduling of the uplink service data and the resource allocation are completed, the feedback resource is allocated in the downlink of the next frame, and is used to send the group acknowledgement response Group ACK;
  • Step S102 Encapsulate corresponding feedback resource control signaling according to the allocated feedback resource, where the feedback resource control signaling is used to indicate allocation of the feedback resource.
  • Step S103 Send the feedback resource control signaling on a control channel of the physical frame.
  • the feedback resource is: a transmission channel resource, or a short signaling channel resource.
  • control channel may indicate a feedback resource allocation of a downlink transmission channel or a downlink short signaling channel of a corresponding current frame of the uplink scheduled user of the previous frame, for the CAP to send a group acknowledgement response Group ACK; and/or, The feedback resource allocation of the uplink transmission channel or the uplink short signaling channel of the user that is scheduled to be downlinked in the current frame is used for the STA to send the Group ACK.
  • the CAP further encapsulates the downlink transmission resource indication signaling, and is used to send the service data. And it is also sent to the STA on the control channel of the physical frame.
  • the CAP further encapsulates the uplink transmission resource indication signaling, and is used to send the service data. And it is also sent to the STA on the control channel of the physical frame.
  • control channel of the physical frame indicates the resource allocation of the uplink/downlink of the physical frame, which is specifically as follows:
  • a second embodiment of the present invention provides a method for frame acknowledgment.
  • the method includes: Step S201: After the scheduling and resource allocation of the downlink service data of the Nth frame is completed, the CAP is downlinked for the Nth frame. The scheduled user, in the uplink transmission channel of the Nth frame, allocates corresponding uplink feedback resources for transmitting the group acknowledgement response Group ACK of the MAC layer.
  • Step S202 The CAP encapsulates a corresponding feedback resource control channel signal according to the allocated uplink transmission resource, where the feedback resource control signaling is used to indicate allocation of the feedback resource.
  • the CAP further encapsulates the downlink transmission resource indication signaling, and is used to send the downlink service data.
  • Step S203 The CAP sends the feedback resource control signaling on the control channel of the Nth frame, where the feedback resource control signaling is uplink transmission channel resource control.
  • the CAP also sends downlink transmission resource indication signaling on the control channel of the Nth frame.
  • the method further includes:
  • Step S204 The downlink scheduled user STA demodulates the control channel in the Nth frame to obtain corresponding downlink transmission resource indication signaling information and uplink transport channel resource control signaling information.
  • the method further includes:
  • Step S205 After receiving one or more MAC packet MPDUs in the corresponding downlink transmission resource, the downlink scheduled user STA generates an acknowledgement response of one or more MPDUs, and confirms the acknowledgement of the one or more MPDUs.
  • the group acknowledgment Group ACK encapsulated as the MAC layer is sent to the CAP in the uplink transport channel of the Nth frame.
  • control channel may indicate a feedback resource allocation of the downlink transport channel of the current frame corresponding to the uplink scheduled user of the previous frame, for the CAP to send the group acknowledgement response Group ACK; and/or, indicating that the downlink of the frame is scheduled.
  • the feedback resource allocation of the uplink transmission channel of the user is used by the STA to send a Group ACK.
  • a third embodiment of the present invention provides a method for frame acknowledgment.
  • the method includes: Step S301: After the scheduling and resource allocation of the uplink service data of the Nth frame is completed, the CAP is uplinked for the Nth frame. The scheduled user, in the downlink of the (N+1)th frame, allocates a corresponding downlink transport channel resource, and is used to send a group acknowledgement response Group ACK.
  • Step S302 The CAP encapsulates a corresponding feedback resource control signal according to the allocated downlink transport channel resource, where the feedback resource control signaling is used to indicate the allocation of the feedback resource.
  • the CAP further encapsulates the uplink transmission resource indication signaling, and is used to send the uplink service data.
  • Step S303 The CAP sends the feedback resource control signaling on the control channel of the (N+1)th frame, where the feedback resource control signaling is downlink transport channel resource control signaling.
  • the CAP also sends uplink transmission resource indication signaling on the control channel of the (N+1)th frame.
  • the method further includes:
  • Step S304 The uplink scheduled user demodulates the control channel in the Nth frame, obtains corresponding uplink transmission resource indication signaling information, and sends service data to the CAP; and performs control channel on the N+1 frame. Demodulation, obtaining corresponding downlink transport channel resource control signaling information.
  • the method further includes:
  • Step S305 After receiving the one or more MAC packet MPDUs in the corresponding uplink transmission resource in the Nth frame, the CAP generates an acknowledgement response of one or more MPDUs, and encapsulates the acknowledgement response of the one or more MPDUs into The group of the MAC layer acknowledges the response Group ACK and transmits it in the downlink transport channel of the (N+1)th frame.
  • control channel may indicate a feedback resource allocation of the downlink transport channel of the current frame corresponding to the uplink scheduled user of the previous frame, for the CAP to send the group acknowledgement response Group ACK; and/or, indicating that the downlink of the frame is scheduled.
  • the feedback resource allocation of the uplink transmission channel of the user is used by the STA to send a Group ACK.
  • a fourth embodiment of the present invention provides a method for frame acknowledgment. As shown in FIG. 6, the method includes: Step S401: After the scheduling and resource allocation of the downlink service data of the Nth frame is completed, the CAP is downlinked for the Nth frame. The scheduled user, in the uplink transmission channel of the Nth frame, allocates corresponding uplink feedback resources for transmitting the group acknowledgement response Group ACK of the MAC layer.
  • Step S402 The CAP encapsulates a corresponding feedback resource control channel signaling according to the allocated uplink transmission resource, where the feedback resource control signaling is used to indicate allocation of the feedback resource.
  • the CAP further encapsulates the downlink transmission resource indication signaling, and is used to send the downlink service data.
  • Step S403 The CAP sends the feedback resource control signaling on the control channel of the Nth frame, where the feedback resource control signaling is uplink short signaling channel resource control signaling.
  • the CAP also sends downlink transmission resource indication signaling on the control channel of the Nth frame.
  • the method further includes:
  • Step S404 The downlink scheduled user STA demodulates the control channel in the Nth frame to obtain corresponding downlink transmission resource indication signaling information and uplink transport channel resource control signaling information.
  • the method further includes:
  • Step S405 After receiving one or more MAC packet MPDUs in the corresponding downlink transmission resource, the downlink scheduled user STA generates an acknowledgement response of one or more MPDUs, and confirms the acknowledgement of the one or more MPDUs.
  • the group acknowledgment Group ACK encapsulated as the MAC layer is sent to the CAP in the uplink transport channel of the Nth frame.
  • Step S406 After the scheduling and resource allocation of the uplink service data in the Nth frame is completed, the CAP is the uplink scheduled user in the Nth frame, and allocates the corresponding downlink transport channel resource in the downlink of the N+1 frame, and is used for sending. The group acknowledges the response Group ACK.
  • Step S407 The CAP encapsulates the corresponding feedback resource control signal according to the allocated downlink transport channel resource.
  • the CAP further encapsulates the uplink transmission resource indication signaling, and is used to send the uplink service data.
  • Step S408 The CAP sends the feedback resource control signaling on the control channel of the (N+1)th frame, where the feedback resource control signaling is downlink short signaling channel resource control signaling.
  • the CAP also sends uplink transmission resource indication signaling on the control channel of the (N+1)th frame.
  • the method further includes:
  • Step S409 The uplink scheduled user demodulates the control channel in the Nth frame, obtains corresponding uplink transmission resource indication signaling information, and sends service data to the CAP; performs control channel on the N+1 frame. Demodulation, obtaining corresponding downlink transport channel resource control signaling information.
  • the method further includes:
  • Step S410 After receiving the one or more MAC packets in the corresponding uplink transmission resource in the Nth frame, the CAP generates an acknowledgement response of one or more MPDUs, and encapsulates the acknowledgement response of the one or more MPDUs into a MAC address.
  • the group of layers confirms the response Group ACK and transmits in the downlink transport channel of the N+1th frame.
  • control channel is used to indicate the feedback resource allocation of the downlink transport channel of the current frame corresponding to the uplink scheduled user of the previous frame, for the CAP to send the group acknowledgement response Group ACK; and/or to indicate that the downlink of the frame is scheduled.
  • the feedback resource allocation of the uplink transmission channel of the user is used by the STA to send a Group ACK.
  • the DL-TCH downlink transmission channel in the frame structure of FIG. 2 is specifically divided into two parts: a header part: a DL-TCH downlink short signaling channel, and a latter part: a DL-TCH downlink transmission channel;
  • the UL-TCH uplink transmission channel is divided into two parts: a header part: a UL-TCH uplink short signaling channel, and a latter part: a UL-TCH downlink transmission channel.
  • the DL-TCH downlink short signaling channel and the UL-TCH uplink short signaling channel are used for transmitting ACK; the DL-TCH downlink transmission channel and the UL-TCH uplink transmission channel are used for transmitting service data.
  • a sixth embodiment of the present invention provides a method for frame acknowledgment. As shown in FIG. 8, the method includes: Step S501: After the scheduling and resource allocation of the downlink service data of the Nth frame is completed, the CAP is downlinked for the Nth frame. The scheduled user, in the uplink of the Nth frame, allocates corresponding uplink short signaling channel resources for transmitting the group acknowledgement group ACK of the MAC layer.
  • Step S502 The CAP encapsulates the corresponding feedback resource control signaling according to the allocated uplink short signaling channel resource, where the feedback resource control signaling is used to indicate the allocation of the feedback resource.
  • the CAP further encapsulates the downlink transmission resource indication signaling, and is used to send the downlink service data.
  • Step S503 The CAP sends the feedback resource control signaling on the control channel of the Nth frame, where the feedback resource control signaling is uplink short signaling channel resource control signaling.
  • the CAP also sends downlink transmission resource indication signaling on the control channel of the Nth frame.
  • Step S504 The downlink scheduled user STA demodulates the control channel in the Nth frame, and obtains corresponding downlink transmission resource indication instruction information and uplink short signaling channel resource control signaling information.
  • Step S505 After receiving the packet in the corresponding downlink transmission resource, the downlink scheduled user STA generates an acknowledgement response of one or more MPDUs, and encapsulates the acknowledgement response of the one or more MPDUs into a group of the MAC layer. Confirm the response Group ACK.
  • control channel is used to indicate the feedback resource allocation of the downlink short signaling channel of the current frame corresponding to the uplink scheduled user of the previous frame, and is used for the CAP sending group acknowledgement response Group ACK; and/or, indicating that the downlink of the frame is
  • the feedback resource allocation of the uplink short signaling channel of the scheduled user is used by the STA to send a Group ACK.
  • a seventh embodiment of the present invention provides a method for frame acknowledgment. As shown in FIG. 8, the method includes: Step S601: After the scheduling and resource allocation of the uplink service data in the Nth frame is completed, the CAP is the Nth. The user whose frame uplink is scheduled, in the downlink of the N+1th frame, allocates corresponding downlink short signaling channel resources for transmitting ACK.
  • Step S602 The CAP encapsulates the corresponding feedback resource control signaling according to the allocated downlink short signaling channel resource, where the feedback resource control signaling is used to indicate the allocation of the feedback resource.
  • the CAP further encapsulates the uplink transmission resource indication signaling, and is used to send the uplink service data.
  • Step S603 The CAP sends the feedback resource control signaling on the control channel of the (N+1)th frame, where the feedback resource control signaling is downlink transport channel resource control signaling.
  • the CAP also sends uplink transmission resource indication signaling on the control channel of the (N+1)th frame.
  • the method further includes:
  • Step S604 The uplink scheduled user demodulates the control channel in the Nth frame, obtains corresponding uplink transmission resource indication signaling, and sends service data to the CAP; demodulates the control channel in the N+1th frame to obtain Corresponding downlink transport channel resource control signaling information.
  • the method further includes:
  • Step S605 After receiving one or more MAC packet MPDUs in the corresponding uplink transmission resource, the CAP generates an acknowledgement response of one or more MPDUs, and encapsulates the acknowledgement response of the one or more MPDUs into a MAC layer.
  • the group acknowledges the response Group ACK and transmits in the downlink short signaling channel of the N+1th frame.
  • control channel may indicate a feedback resource allocation of the downlink short signaling channel of the current frame corresponding to the uplink scheduled user of the previous frame, and is used for the CAP to send the group acknowledgement response Group ACK; and/or, indicating that the downlink of the frame is scheduled.
  • the feedback resource allocation of the uplink short signaling channel of the user is used by the STA to send a Group ACK.
  • the eighth embodiment of the present invention provides a method for frame confirmation based on the frame structure of the fifth embodiment. As shown in FIG. 8, the method includes:
  • Step S701 After the scheduling and resource allocation of the downlink service data of the Nth frame is completed, the CAP allocates corresponding uplink short signaling channel resources for the uplink of the Nth frame, and is used for the sending group. Confirm the response Group ACK.
  • Step S702 The CAP encapsulates the corresponding feedback resource control signaling according to the allocated uplink short signaling channel resource, where the feedback resource control signaling is used to indicate the allocation of the feedback resource.
  • Step S703 The CAP sends the feedback resource control signaling on the control channel of the Nth frame, where the feedback resource control signaling is uplink short signaling channel resource control signaling.
  • the CAP also sends downlink transmission resource indication signaling on the control channel of the Nth frame.
  • the method further includes:
  • Step S704 The downlink scheduled user STA demodulates the control channel in the Nth frame to obtain corresponding downlink transmission resource indication signaling information and uplink short signaling channel resource control signaling information.
  • the method further includes:
  • Step S705 After receiving one or more MAC packet MPDUs in the corresponding downlink transmission resource, the downlink scheduled user STA generates an acknowledgement response of one or more MPDUs, and confirms the acknowledgement of the one or more MPDUs.
  • the group acknowledgment Group ACK encapsulated as the MAC layer is sent to the CAP in the uplink short signaling channel of the Nth frame.
  • the method further includes:
  • Step S706 The CAP is the Nth frame after the uplink service data scheduling and resource allocation in the Nth frame is completed.
  • the uplink scheduled user allocates a corresponding downlink short signaling channel resource for transmitting the group acknowledgement response Group ACK in the downlink of the N+1th frame.
  • Step S707 The CAP encapsulates the corresponding feedback resource control signaling according to the allocated downlink short signaling channel resource.
  • Step S708 The CAP sends the feedback resource control signaling on the control channel of the (N+1)th frame, where the feedback resource control signaling is downlink short signaling channel resource control signaling.
  • the CAP also sends uplink transmission resource indication signaling on the control channel of the (N+1)th frame.
  • the method further includes:
  • Step S709 The uplink scheduled user demodulates the control channel in the Nth frame, obtains corresponding uplink transmission resource indication signaling information, and sends service data to the CAP; demodulates the control channel in the N+1th frame, Obtain corresponding downlink short signaling channel resource control signaling information.
  • the method further includes:
  • Step S710 After receiving the one or more MAC packets in the corresponding uplink transmission resource in the Nth frame, the CAP generates an acknowledgement response of one or more MPDUs, and encapsulates the acknowledgement response of the one or more MPDUs into a MAC address.
  • the group of layers confirms the acknowledgement Group ACK and transmits in the downlink short signaling channel of the N+1th frame.
  • control channel may indicate a feedback resource allocation of the downlink short signaling channel of the current frame corresponding to the uplink scheduled user of the previous frame, and is used for the CAP to send the group acknowledgement response Group ACK; and/or, indicating that the downlink of the frame is scheduled.
  • the feedback resource allocation of the uplink short signaling channel of the user is used by the STA to send a Group ACK.
  • Embodiment 9 of the present invention is a specific application embodiment.
  • FIG. 8 is a schematic diagram of a system frame structure of an uplink and downlink scheduling transmission process provided by an application example.
  • the frame is divided into a preamble sequence, a system information channel, a control channel, a downlink short signaling channel, a downlink traffic transmission channel, a downlink guard interval DGI, an uplink sounding channel, an uplink scheduling request channel, an uplink short signaling channel, and an uplink service.
  • the preamble sequence specifically includes a short preamble and a long preamble.
  • a CAP association has 3 STAs: STA1, STA2, and STA3.
  • the downlink universal ack strategy includes the following steps:
  • Step S801 After the scheduling and resource allocation of the downlink service data of the Nth frame is completed, the CAP allocates a corresponding feedback resource for sending the Group ACK in the uplink of the Nth frame for the downlink scheduled user, as shown in FIG.
  • STA (1) or STA (2) is allocated an uplink short signaling channel resource for transmitting a Group ACK.
  • Step S802 The CAP generates corresponding CCH signaling for the scheduling result of the foregoing ACK, and sends the CCH signaling channel on the CCH control channel of the Nth frame.
  • Step S803 STA (1) or STA (2) demodulates the control channel CCH in the Nth frame, and obtains a corresponding downlink TCH resource and an uplink ACK feedback resource. After receiving one or more MAC packet MPDUs in the corresponding DL-TCH, generating an acknowledgement response of one or more MPDUs, and encapsulating the acknowledgement response of the one or more MPDUs into a group acknowledgement response of the MAC layer Group ACK, and send an immediate type Group ACK in the allocated uplink short signaling channel for confirmation.
  • Step S804 When the uplink scheduling of the Nth frame is completed, the CAP determines that the transmission user of the UL-TCH of the Nth frame is the STA (3), and then needs to ensure that the uplink user STA scheduled in the Nth frame is the Nth frame. (3) A downlink resource is allocated for sending an immediate ACK. For example, in FIG. 8, the Nth frame schedules the uplink STA3, and then the N+1th frame allocates DL short signaling resources for the STA (3) for transmitting the immediate type ACK.
  • Step S805 The CAP generates corresponding CCH signaling for the scheduling result of the foregoing ACK, and the signaling is sent on the CCH control channel of the (N+1)th frame.
  • Step S806 After demodulating the CCH in the Nth frame, the STA3 obtains the corresponding uplink TCH resource, and sends the service data in the UL-TCH.
  • Step S807 After receiving one or more MAC packet MPDUs in the UL-TCH of STA3 in the Nth frame, the CAP generates an acknowledgement response of one or more MPDUs, and encapsulates the acknowledgement response of the one or more MPDUs.
  • the acknowledgment Group ACK is acknowledged for the group of the MAC layer, and the Group ACK is transmitted in the downlink short signaling channel of the (N+1)th frame.
  • an embodiment of the present invention provides a device (network device CAP) for frame confirmation, as shown in FIG. 9, including:
  • the allocation module 11 is configured to allocate a feedback resource in an uplink of the physical frame after the scheduling and resource allocation of the downlink service data is completed; or, after the scheduling and resource allocation of the uplink service data is completed, allocate the feedback resource in the downlink of the next frame. , to send a group confirmation response Group ACK;
  • the encapsulating module 12 is configured to encapsulate corresponding feedback resource control signaling according to the allocated feedback resource, where the feedback resource control signaling is used to indicate allocation of the feedback resource;
  • the sending module 13 is configured to send the feedback resource control signaling on a control channel of the physical frame.
  • the feedback resource is: a transmission channel resource, or a short signaling channel resource.
  • the downlink ACK policy the above device may also have the following characteristics:
  • the allocating module 11 is configured to: after the scheduling of the downlink service data of the Nth frame and the resource allocation is completed, allocate the corresponding uplink transmission channel resource or the uplink short message to the uplink scheduled user in the Nth frame. Let the channel resource be used to send the MAC layer's group acknowledgment response GROUP ACK.
  • the encapsulating module 12 is specifically configured to encapsulate corresponding feedback resource control channel signaling according to the allocated uplink transport channel resource or the uplink short signaling channel resource;
  • the sending module 13 is specifically configured to send the feedback resource control signaling on the control channel of the Nth frame.
  • the uplink ACK policy the above device may also have the following characteristics:
  • the allocating module 11 is further configured to: after the scheduling of the uplink service data of the Nth frame and the resource allocation is completed, allocate the corresponding downlink transmission channel resource for the downlink scheduled user in the Nth frame, or the downlink of the N+1 frame.
  • a downlink short signaling channel resource configured to send a group acknowledgement response Group ACK;
  • the encapsulating module 12 is further configured to encapsulate corresponding feedback resource control signaling according to the allocated downlink transport channel resource or the downlink short signaling channel resource;
  • the sending module 13 is specifically configured to send the feedback resource control signaling on the control channel of the (N+1)th frame.
  • the foregoing apparatus further includes:
  • the generating module 14 is configured to: after receiving the packet in the corresponding uplink transmission resource, generate an acknowledgement response of one or more MPDUs, and encapsulate the acknowledgement response of the one or more MPDUs into a group acknowledgement response group of the MAC layer. ACK;
  • the second sending module 15 is configured to send the Group ACK in a downlink transport channel or a downlink short signaling channel of the (N+1)th frame.
  • the above device may also have the following features:
  • the control channel may indicate a downlink transmission channel or a downlink of the current frame corresponding to the uplink scheduled user of the previous frame.
  • the feedback resource allocation of the short signaling channel is used for the CAP to send the group acknowledgement response Group ACK; and/or the feedback resource allocation of the uplink transmission channel or the uplink short signaling channel of the user that is scheduled to be downlinked in the current frame, for the STA to send the Group ACK .
  • an embodiment of the present invention provides a device (terminal device STA) for frame confirmation, as shown in FIG.
  • the receiving module 21 is configured to receive a downlink physical frame.
  • the demodulation module 22 is configured to demodulate the control channel of the physical frame, and obtain corresponding downlink transmission resource indication signaling information and feedback resource control signaling information;
  • the feedback resource is: an uplink transmission channel resource or an uplink short signaling channel resource; preferably, the method further includes:
  • the generating module 23 is configured to: after receiving one or more packets in the corresponding downlink transmission resource, generate an acknowledgement response of one or more MPDUs, and encapsulate the acknowledgement response of the one or more MPDUs into a MAC layer Group acknowledgment Group ACK; and,
  • the sending module 24 is configured to send the Group ACK in an uplink transport channel or an uplink short signaling channel of the current frame.
  • the embodiment of the present invention further provides a device (terminal device STA) for frame confirmation, as shown in FIG. 12, including:
  • the receiving module 31 is configured to receive a downlink physical frame.
  • the demodulation module 32 is configured to demodulate the control channel of the physical frame to obtain corresponding uplink transmission resource indication signaling information, and is further configured to demodulate the control channel of the next frame to obtain a corresponding feedback resource control signal. Order information
  • the feedback resource is a downlink transport channel resource or a downlink short signaling channel resource.
  • the data packet is transmitted and acknowledged in the form of a MAC frame at the MAC level, and the group confirms that the lowest acknowledgement delay is achieved at the lowest complexity. High reliability; short signaling channel, short delay, fast response, is conducive to resource scheduling and retransmission scheduling; and group aggregation frame G-MPDU rarely contains fragmentation, reducing the use of fragmentation. Unless specifically stated otherwise, terms such as processing, computing, computing, determining, displaying, etc.
  • the physical (e.g., electronic) amount of data manipulation and conversion within the registers or memory of the processing system is similarly represented as memory, registers, or other such information of the processing system to store, transmit, or otherwise display other quantities of data within the device.
  • Information and signals can be represented using any of a variety of different techniques and methods.
  • the data, instructions, commands, information, signals, bits, symbols, and chips referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.
  • the steps of a method or algorithm described in connection with the embodiments herein may be embodied directly in hardware, a software module executed by a processor, or a combination thereof.
  • the software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be part of the processor.
  • the processor and storage media can be located in an ASIC.
  • the ASIC can be located in the user terminal.
  • the processor and the storage medium can also exist as discrete components in the user terminal.
  • the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described herein.
  • modules e.g., procedures, functions, etc.
  • These software codes can be stored in a memory unit and executed by the processor.
  • the memory unit can be implemented within the processor or external to the processor. In the latter case, it is communicatively coupled to the processor via various means, which are well known in the art.

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Abstract

本发明公开了一种用于帧确认的方法,包括:在下行业务数据的调度和资源分配完成后,在本物理帧的上行分配反馈资源;或,在上行业务数据的调度和资源分配完成后,在下一帧的下行分配反馈资源,用于发送组确认应答Group ACK;根据分配的反馈资源,封装对应的反馈资源控制信令,该反馈资源控制信令用于指示反馈资源的分配;在物理帧的控制信道发送该反馈资源控制信令。本发明还公开了一种用于帧确认的装置。采用本发明提供的方法和装置,在基于集中式调度的具有上下行帧结构的无线通信系统中,在MAC级实现以MAC帧的形式进行数据分组的发送和确认,该组确认以最低的复杂度为代价,实现了最低的确认延迟和很高的可靠性,有利于资源调度和重传的调度。

Description

本发明属于无线通信领域, 尤其涉及一种用于帧确认的方法和装置。
背景技术
IEEE802.11 系统是基于竟争的系统, 所釆用的即时型应答( ack ) 的策略简单 有效。 例如, IEEE 802.11 a/b/g中广泛釆用了 ack的策略, 即站点在接收到单播帧 (如 DATA帧), 立即反馈 ACK帧进行确认。 在 IEEE 802.11 η系统中, 釆用了 ΗΤ Block ACK机制来对一批数据分组进行联合确认, 从而提高了效率。 特别的, HT 立即型的 block ack策略是针对 HT站点之间而言的一种高效的 Block ack机制, 即 当一个 HT站点发送了一批聚合帧且其携带的 ack policy位设定为 normal ack时, 就默认釆用立即型确认。 另外, IEEE 802.11 η还定义了延迟型 ack策略, 如果釆用 延迟型 ACK, 分组的传输延时会加大, 不利于传输对时延敏感的业务。
现有的基于集中式调度的通信系统, 如 IEEE 802.1 6和长期演进( Long Term Evolution,简称 LTE )系统中, 均釆用了基于混合自动重传请求( HARQ-ack )机制。 HARQ机制是针对物理资源块来进行确认, 时效性和有效性得到了保证, 但其不可 避免带来了实现的复杂度,而且与 IEEE 802.11 系统的 MAC级别的 ACK机制相比, 其可靠性也大打折扣。
LTE系统的下行 HARQ机制简单描述如下, 其系统的下行信道包括控制信号、 参考信号和数据信号。 其中下行共享信道( PDSCH )传输下行的数据信号, 下行控 制信令(PDCCH )传输数据传输调度结果。 上行信号也包括控制信号和数据信号。 可利用上行控制信道(PUSCH )来传输上行控制信号, 包括 ACK/NACK, CQI指 示等。 LTE系统中的 HARQ-ack机制针对物理子帧进行确认, LTE系统的 RLC层 需要进行比较复杂的分割和重组以保证适应物理层的传输块( TB )。
IEEE 802.1 6系统中,也加入了 H-ARQ策略, 需要进行比较复杂的分割来形成 HARQ子包, H-ARQ是针对 HARQ子包来进行确认。 总之, HARQ导致了系统的 可靠性较低且实现复杂度较高, 有效性则有所提高。 802.1 6系统的 MAC层釆用了 可选的 ARQ策略, 但由于将 ACK作为上行数据帧需要进行调度, 导致确认的效率 低且延迟较大、 实现复杂度较低。
802.1 6系统的 MAC层的 ARQ功能是可选的, ACK的调度不是即时的, 其延 迟较大调度复杂度也比较高。 同时其 ARQ 要求对 ARQ-BLOCK 进行确认, 而 ARQ-BLOCK子包需要分割, 导致帧确认的效率较低。
发明内容
有鉴于此, 本发明的一个目的是提供一种用于帧确认的方法和装置。 为了对披 露的实施例的一些方面有一个基本的理解, 下面给出了简单的概括。 该概括部分不 是泛泛评述, 也不是要确定关键 /重要组成元素或描绘这些实施例的保护范围。 其 唯一目的是用简单的形式呈现一些概念, 以此作为后面的详细说明的序言。 本发明的另一个目的是提供的一种用于帧确认的方法, 包括: 在下行业务数据的调度和资源分配完成后, 在本物理帧的上行分配反馈资源; 或, 在上行业务数据的调度和资源分配完成后, 在下一帧的下行分配反馈资源, 用 于发送组确认应答 Group ACK;
根据分配的反馈资源, 封装对应的反馈资源控制信令, 该反馈资源控制信令用 于指示反馈资源的分配;
在物理帧的控制信道发送该反馈资源控制信令。
在一些可选的实施例中, 所述反馈资源为: 传输信道资源, 或, 短信令信道资 源。
在一些可选的实施例中, 在第 N帧的下行业务数据的调度和资源分配完成后, 为第 N帧下行被调度的用户,在第 N帧的上行, 分配相应的上行传输信道资源或上 行短信令信道资源, 用于发送 MAC层的组确认应答 Group ACK;
根据分配的上行传输信道资源或上行短信令信道资源, 封装对应的反馈资源控 制信道信令;
在第 N帧的控制信道发送该反馈资源控制信令。
在一些可选的实施例中, 还包括:
下行被调度的用户在第 N帧对控制信道进行解调, 获得对应的下行传输资源指 示信令信息和反馈资源控制信令信息; 其中, 所述反馈资源为: 上行传输信道资源 或上行短信令信道资源。
在一些可选的实施例中, 还包括:
用户在接收完对应的下行传输资源中的一个或多个 MAC分组 MPDU后, 生成 一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认应答 Group ACK,在 第 N帧的上行传输信道或上行短信令信道中发送给 CAP。
在一些可选的实施例中, 还包括:
在第 N帧的上行业务数据的调度和资源分配完成后,为第 N帧上行被调度的用 户, 在第 N+1帧的下行, 分配相应的下行传输信道资源或下行短信令信道资源, 用 于发送 MAC层的组确认应答 Group ACK;
根据分配的下行传输信道资源或下行短信令信道资源, 封装对应的反馈资源控 制信令;
在第 N+1帧的控制信道发送该反馈资源控制信令。
在一些可选的实施例中, 还包括:
上行被调度的用户在第 N帧对控制信道进行解调, 获得对应的上行传输信道资 源的指示信令信息, 在第 N+1帧对控制信道进行解调, 获得对应的反馈资源控制信 令信息; 其中, 所述反馈资源为: 下行传输信道资源或下行短信令信道资源。
在一些可选的实施例中, 还包括:
CAP 在第 N 帧接收完对应的上行传输信道资源中的一个或多个 MAC 分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认应答 Group ACK, 在第 N+1帧的下行传输信道或下行短信令信道中发送。
在一些可选的实施例中, 所述控制信道能够指示上一帧上行被调度的用户对应 的本帧的下行传输信道或下行短信令信道的反馈资源分配,用于 CAP发送组确认应 答 Group ACK;和 /或,指示本帧下行被调度的用户的上行传输信道或上行短信令信 道的反馈资源分配, 用于 STA发送组确认应答 Group ACK。
本发明的另一个目的是提供的一种用于帧确认的装置, 包括: 分配模块, 用于在下行业务数据的调度和资源分配完成后, 在本物理帧的上行 分配反馈资源; 或, 用于在上行业务数据的调度和资源分配完成后, 在下一帧的下 行分配反馈资源, 以发送组确认应答 Group ACK;
封装模块, 用于根据分配的反馈资源, 封装对应的反馈资源控制信令, 所述反 馈资源控制信令用于指示反馈资源的分配; 和,
发送模块, 用于在物理帧的控制信道发送所述反馈资源控制信令。
在一些可选的实施例中, 所述反馈资源为: 传输信道资源, 或, 短信令信道资 源。
在一些可选的实施例中, 所述分配模块, 具体用于在第 N帧的下行业务数据的 调度和资源分配完成后, 为第 N帧下行被调度的用户, 在第 N帧的上行, 分配相应 的上行传输信道资源或上行短信令信道资源,用于发送 MAC层的组确认应答 Group ACK;
所述封装模块,具体用于根据分配的上行传输信道资源或上行短信令信道资源, 封装对应的反馈资源控制信令;
所述发送模块, 具体用于在第 N帧的控制信道发送该反馈资源控制信令。
在一些可选的实施例中,
所述分配模块, 还用于在第 N帧的上行业务数据的调度和资源分配完成后, 为 第 N帧上行被调度的用户,在第 N+1帧的下行,分配相应的下行传输信道资源或下 行短信令信道资源, 用于发送组确认应答 Group ACK;
所述封装模块, 还用于根据分配的下行传输信道资源或下行短信令信道资源, 封装对应的反馈资源控制信令;
所述发送模块, 具体用于在第 N+1帧的控制信道发送该反馈资源控制信令。 在一些可选的实施例中, 还包括:
生成模块, 用于在接收完对应的上行传输信道资源中的一个或多个 MAC层分 组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认 应答 Group ACK;
第二发送模块, 用于在第 N+1 帧的下行传输信道或下行短信令信道中发送该 Group ACK。
在一些可选的实施例中, 所述控制信道能够指示上一帧上行被调度的用户对应 的本帧的下行传输信道或下行短信令信道的资源分配, 用于 CAP 发送组确认应答 Group ACK; 和 /或, 指示本帧下行被调度的用户的上行传输信道或上行短信令信道 的资源分配, 用于 STA发送 Group ACK。
本发明的另一个目的是提供的一种用于帧确认的装置, 包括:
接收模块, 用于接收下行物理帧;
解调模块, 用于对该物理帧的控制信道进行解调, 获得对应的下行传输资源指 示信令信息和反馈资源控制信令信息。
在一些可选的实施例中, 所述反馈资源为: 上行传输信道资源或上行短信令信 道资源。
在一些可选的实施例中, 还包括:
生成模块, 用于在接收完对应的下行传输资源中的一个或多个 MAC 层分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认应答 Group ACK; 和,
发送模块, 用于在本帧的上行传输信道或上行短信令信道中发送该 Group ACK。
本发明的另一个目的是提供的一种用于帧确认的装置, 包括:
接收模块, 用于接收下行物理帧;
解调模块, 用于对该物理帧的控制信道进行解调, 获得对应的上行传输资源指 示信令信息, 还用于对下一帧的控制信道进行解调, 获得对应的反馈资源控制信令 信息。
在一些可选的实施例中, 所述反馈资源为: 下行传输信道资源或下行短信令信 道资源。
釆用本发明的方法和装置, 有如下效果:
1 ,在基于集中式调度的具有上下行帧结构的无线通信系统中,在 M A C级实现 以 MAC帧的形式进行数据分组的发送和确认, 该组确认以最低的复杂度为代价, 实现了最低的确认延迟和很高的可靠性。
2, 组聚合帧 G-MPDU很少包含分片, 使得减少分片的使用。
3, 资源调度方式实现 ACK的传输, 配置上下行信道, 从时序角度考虑, 配置 短信令信道靠前,调度在信令反馈信道中传输,使得发转收时刻收到 ACK, 时延小, 反应快, 有利于资源调度和重传的调度。
4, 聚合, G-ACK。
为了上述以及相关的目的, 一个或多个实施例包括后面将详细说明并在权利要 求中特别指出的特征。 下面的说明以及附图详细说明某些示例性方面, 并且其指示 的仅仅是各个实施例的原则可以利用的各种方式中的一些方式。 其它的益处和新颖 性特征将随着下面的详细说明结合附图考虑而变得明显, 所公开的实施例是要包括 所有这些方面以及它们的等同。
说明书附图
图 1是新定义的中短距离无线通信系统的系统架构示意图;
图 2是本发明实施例提供的另一种帧结构的示意图;
图 3是 G-MPDU的结构示意图;
图 4是 G-MPDU的结构示意图;
图 5是本发明实施例一提供的一种用于帧确认的方法的流程示意图; 图 6 是本发明实施例二至四提供的上下行调度传输过程的系统帧结构的示意 图;
图 7是本发明实施例五提供的另一种帧结构的示意图;
图 8 是本发明实施例六至九提供的上下行调度传输过程的系统帧结构的示意 图;
图 9是本发明实施例十提供的一种用于帧确认的装置的示意图;
图 10是本发明实施例十提供的另一种用于帧确认的装置的示意图;
图 11是本发明实施例十一提供的另一种用于帧确认的装置的示意图; 图 12是本发明实施例十二提供的另一种用于帧确认的装置的示意图。
实施方式
以下描述和附图充分地示出本发明的具体实施方案, 以使本领域的技术人员能 够实践它们。 其他实施方案可以包括结构的、 逻辑的、 电气的、 过程的以及其他的 改变。 实施例仅代表可能的变化。 除非明确要求, 否则单独的组件和功能是可选的, 并且操作的顺序可以变化。 一些实施方案的部分和特征可以被包括在或替换其他实 施方案的部分和特征。 本发明的实施方案的范围包括权利要求书的整个范围, 以及 权利要求书的所有可获得的等同物。 在本文中, 本发明的这些实施方案可以被单独 地或总地用术语 "发明" 来表示, 这仅仅是为了方便, 并且如果事实上公开了超过 一个的发明, 不是要自动地限制该应用的范围为任何单个发明或发明构思。
本发明实施例是基于一种无线通信系统实现的, 该系统具备如下特点, 物理帧 结构中分为下行和上行帧周期, 上下行帧周期包括了数据传输信道和信令信道。 该 无线通信系统需要集中式的调度,下行帧周期和上行帧周期的资源需要由 CAP进行 集中的调度分配。 参见图 1 , 该图示出了新定义的中短距离无线通信系统的 PHY层 帧结构, 帧结构如图 2所示。 帧结构中各子信道的定义如表 1所示。
表 1
Figure imgf000006_0001
该系统中的 MAC PDU不必进行复杂的分片和切割, 所形成的 G-MPDU可以 在物理帧结构中的 DL-TCH和 UL-TCH中直接发送, 如图 3和图 4所示。 解释: ACK通常被调度在 DL-TCH和 UL-TCH里面进行传输, 或者被调度在 传输信道前面的短信令信道里面进行传输, 在传输信道里面传输时, 可以与普通数 据帧一起组成 G-MPDU。 上述的 G-MPDU是为了解释数据帧。
本发明实施例在一个具备上下行结构的釆用集中式调度无线通信系统中, 提出 一种在 MAC级别的, 通用立即型 ACK策略, 从而以最低的复杂度来实现低延迟和 高可靠性的确认。 本发明实施例提供的帧确认的方法, 既适用于管理帧也适用于数 据帧。 发送端发送帧后, 接收端立即返回确认应答, 以告知发送端所述数据是否被 成功接收, 从而能够对数据发送成功与否进行有效监控。
本发明实施例中, 中心接入点 ( CAP )是为接入的 STA提供访问服务的实体; STA是具有媒体接入控制 (MAC)和物理层(PHY )功能接口, 能与 CAP通信的终 端设备。 CAP与 STA之间通过物理帧进行通信, 每个物理帧周期依次包括下行周 期和上行周期: CAP在下行周期向 STA发送数据; STA在上行周期向 CAP发送数 据。
该无线通信系统中, 由 CAP完成系统资源的分配和调度功能,调度结果通过资 源分配控制信令 CCH广播给用户。
其中 CAP的下行调度主要完成对下行帧周期内的资源分配, 包括: DL-TCH业 务的资源分配和 CCH控制信令的生成。
上行调度主要完成对上行帧周期内的资源分配, 包括: UL-TCH 业务的资源分 配和 CCH控制信令的生成。
本发明实施例中所提出的即时型 ACK 方法是通过系统的调度并产生的相应的 CCH控制信令来实现。 第 N帧的上下行调度结果信息, 需要在第 N帧物理帧发送 之前提前准备好。 实施例一
本发明实施例一提出了一种用于帧确认的方法, 如图 5所示, 包括: 步骤 S101 : 在下行业务数据的调度和资源分配完成后,在本物理帧的上行分配 反馈资源; 或, 在上行业务数据的调度和资源分配完成后, 在下一帧的下行分配反 馈资源, 用于发送组确认应答 Group ACK;
步骤 S102: 根据分配的反馈资源, 封装对应的反馈资源控制信令, 该反馈资源 控制信令用于指示反馈资源的分配。
步骤 S103: 在物理帧的控制信道发送该反馈资源控制信令。
较佳地, 反馈资源为: 传输信道资源, 或, 短信令信道资源。
较佳地, 该控制信道可以指示上一帧上行被调度的用户的对应的本帧的下行传 输信道或下行短信令信道的反馈资源分配,用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下行被调度的用户的上行传输信道或上行短信令信道的反馈资源分 配, 用于 STA发送 Group ACK。
较佳地, CAP在下行业务数据的调度和资源分配完成后, 还封装下行传输资源 指示信令, 用于发送业务数据。 并且也是在在物理帧的控制信道发送给 STA。
较佳地, CAP在上行业务数据的调度和资源分配完成后, 还封装上行传输资源 指示信令, 用于发送业务数据。 并且也是在在物理帧的控制信道发送给 STA。
较佳地, 本物理帧的控制信道指示的是本物理帧的上 /下行的资源分配情况, 具 体如下:
当在本物理帧的上行分配反馈资源, 则相应的是, 在本物理帧的控制信道发送 该反馈资源控制信令;
当在下一帧的下行分配反馈资源, 则相应的是, 在下一帧的控制信道发送该反 馈资源控制信令。 实施例二
本发明实施例二提出了一种用于帧确认的方法, 如图 6所示, 包括: 步骤 S201 : CAP在第 N帧的下行业务数据的调度和资源分配完成后, 为第 N 帧下行被调度的用户, 在第 N帧的上行传输信道, 分配相应的上行反馈资源, 用于 发送 MAC层的组确认应答 Group ACK。
步骤 S202: CAP根据分配的上行传输资源, 封装对应的反馈资源控制信道信 令, 该反馈资源控制信令用于指示反馈资源的分配;
较佳地, CAP在下行业务数据的调度和资源分配完成后, 还封装下行传输资源 指示信令, 用于发送下行业务数据。
步骤 S203: CAP在第 N帧的控制信道发送该反馈资源控制信令, 该反馈资源 控制信令是上行传输信道资源控制。
较佳地, CAP在第 N帧的控制信道还发送下行传输资源指示信令。
较佳地, 还包括:
步骤 S204: 下行被调度的用户 STA在第 N帧对控制信道进行解调, 获得对应 的下行传输资源指示信令信息和上行传输信道资源控制信令信息。
较佳地, 还包括:
步骤 S205: 下行被调度的用户 STA在接收完对应的下行传输资源中的一个或 多个 MAC分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并将所述一个 或者多个 MPDU的确认应答封装为 MAC层的组确认应答 Group ACK, 并在第 N 帧的上行传输信道中发送给 CAP。
较佳地, 控制信道可以指示上一帧上行被调度的用户对应的本帧的下行传输信 道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下行 被调度的用户的上行传输信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例三
本发明实施例三提出了一种用于帧确认的方法, 如图 6所示, 包括: 步骤 S301 : CAP在第 N帧的上行业务数据的调度和资源分配完成后, 为第 N 帧上行被调度的用户, 在第 N+1帧的下行, 分配相应的下行传输信道资源, 用于发 送组确认应答 Group ACK。
步骤 S302: CAP根据分配的下行传输信道资源, 封装对应的反馈资源控制信 令, 该反馈资源控制信令用于指示反馈资源的分配;
较佳地, CAP在上行业务数据的调度和资源分配完成后, 还封装上行传输资源 指示信令, 用于发送上行业务数据。
步骤 S303: CAP在第 N+1帧的控制信道发送该反馈资源控制信令, 该反馈资 源控制信令为下行传输信道资源控制信令。
较佳地, CAP在第 N+1帧的控制信道还发送上行传输资源指示信令。
较佳地, 还包括:
步骤 S304: 上行被调度的用户在第 N帧对控制信道进行解调, 获得对应的上 行传输资源指示信令信息, 并向 CAP发送业务数据; ,在第 N+1帧对控制信道进行 解调, 获得对应的下行传输信道资源控制信令信息。
较佳地, 还包括:
步骤 S305: CAP在第 N帧接收完对应的上行传输资源中的一个或多个 MAC 分组 MPDU 后, 生成一个或者多个 MPDU 的确认应答, 并将所述一个或者多个 MPDU的确认应答封装为 MAC层的组确认应答 Group ACK,并在第 N+1帧的下行 传输信道中发送。
较佳地, 控制信道可以指示上一帧上行被调度的用户对应的本帧的下行传输信 道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下行 被调度的用户的上行传输信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例四
本发明实施例四提出了一种用于帧确认的方法, 如图 6所示, 包括: 步骤 S401 : CAP在第 N帧的下行业务数据的调度和资源分配完成后, 为第 N 帧下行被调度的用户, 在第 N帧的上行传输信道, 分配相应的上行反馈资源, 用于 发送 MAC层的组确认应答 Group ACK。
步骤 S402: CAP根据分配的上行传输资源, 封装对应的反馈资源控制信道信 令, 该反馈资源控制信令用于指示反馈资源的分配;
较佳地, CAP在下行业务数据的调度和资源分配完成后, 还封装下行传输资源 指示信令, 用于发送下行业务数据。
步骤 S403: CAP在第 N帧的控制信道发送该反馈资源控制信令, 该反馈资源 控制信令是上行短信令信道资源控制信令。
较佳地, CAP在第 N帧的控制信道还发送下行传输资源指示信令。
较佳地, 还包括:
步骤 S404: 下行被调度的用户 STA在第 N帧对控制信道进行解调, 获得对应 的下行传输资源指示信令信息和上行传输信道资源控制信令信息。
较佳地, 还包括:
步骤 S405: 下行被调度的用户 STA在接收完对应的下行传输资源中的一个或 多个 MAC分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并将所述一个 或者多个 MPDU的确认应答封装为 MAC层的组确认应答 Group ACK, 并在第 N 帧的上行传输信道中发送给 CAP。
步骤 S406: CAP在第 N帧的上行业务数据的调度和资源分配完成后, 为第 N 帧上行被调度的用户, 在第 N+1帧的下行, 分配相应的下行传输信道资源, 用于发 送组确认应答 Group ACK。
步骤 S407: CAP根据分配的下行传输信道资源, 封装对应的反馈资源控制信 令;
较佳地, CAP在上行业务数据的调度和资源分配完成后, 还封装上行传输资源 指示信令, 用于发送上行业务数据。
步骤 S408: CAP在第 N+1帧的控制信道发送该反馈资源控制信令, 该反馈资 源控制信令为下行短信令信道资源控制信令。
较佳地, CAP在第 N+1帧的控制信道还发送上行传输资源指示信令。
较佳地, 还包括:
步骤 S409: 上行被调度的用户在第 N帧对控制信道进行解调, 获得对应的上 行传输资源指示信令信息, 并向 CAP发送业务数据; 在第 N+1 帧对控制信道进行 解调, 获得对应的下行传输信道资源控制信令信息。
较佳地, 还包括:
步骤 S410: CAP在第 N帧接收完对应的上行传输资源中的一个或多个 MAC 分组后, 生成一个或者多个 MPDU的确认应答, 并将所述一个或者多个 MPDU的 确认应答封装为 MAC层的组确认应答 Group ACK,并在第 N+1帧的下行传输信道 中发送。
较佳地, 控制信道用于指示上一帧上行被调度的用户对应的本帧的下行传输信 道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下行 被调度的用户的上行传输信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例五
如图 7所示,是将图 2的帧结构中的 DL-TCH下行传输信道具体划分为两部分: 头部分: DL-TCH下行短信令信道, 和后部分: DL-TCH下行传输信道; 将 UL-TCH 上行传输信道具体划分为两部分: 头部分: UL-TCH上行短信令信道, 和后部分: UL-TCH下行传输信道。 DL-TCH下行短信令信道和 UL-TCH上行短信令信道用于 发送 ACK; DL-TCH下行传输信道和 UL-TCH上行传输信道用于发送业务数据。 实施例六
本发明实施例六提出了一种用于帧确认的方法, 如图 8所示, 包括: 步骤 S501 : CAP在第 N帧的下行业务数据的调度和资源分配完成后, 为第 N 帧下行被调度的用户, 在第 N帧的上行, 分配相应的上行短信令信道资源, 用于发 送 MAC层的组确认应答 Group ACK。
步骤 S502: CAP根据分配的上行短信令信道资源, 封装对应的反馈资源控制 信令, 该反馈资源控制信令用于指示反馈资源的分配;
较佳地, CAP在下行业务数据的调度和资源分配完成后, 还封装下行传输资源 指示信令, 用于发送下行业务数据。
步骤 S503: CAP在第 N帧的控制信道发送该反馈资源控制信令, 该反馈资源 控制信令是上行短信令信道资源控制信令。
较佳地, CAP在第 N帧的控制信道还发送下行传输资源指示信令。
还包括:
步骤 S504: 下行被调度的用户 STA在第 N帧对控制信道进行解调, 获得对应 的下行传输资源指示指令信息和上行短信令信道资源控制信令信息。
还包括:
步骤 S505:下行被调度的用户 STA在接收完对应的下行传输资源中的分组后, 生成一个或者多个 MPDU的确认应答, 并将所述一个或者多个 MPDU的确认应答 封装为 MAC层的组确认应答 Group ACK。
较佳地, 控制信道用于指示上一帧上行被调度的用户对应的本帧的下行短信令 信道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下 行被调度的用户的上行短信令信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例七
本发明实施例七提出了一种用于帧确认的方法, 如图 8所示, 包括: 步骤 S601 : CAP在第 N帧的上行业务数据的调度和资源分配完成后, 为第 N 帧上行被调度的用户, 在第 N+1帧的下行, 分配相应的下行短信令信道资源, 用于 发送 ACK。
步骤 S602: CAP根据分配的下行短信令信道资源, 封装对应的反馈资源控制 信令, 该反馈资源控制信令用于指示反馈资源的分配;
较佳地, CAP在上行业务数据的调度和资源分配完成后, 还封装上行传输资源 指示信令, 用于发送上行业务数据。
步骤 S603: CAP在第 N+1帧的控制信道发送该反馈资源控制信令, 该反馈资 源控制信令为下行传输信道资源控制信令。
较佳地, CAP在第 N+1帧的控制信道还发送上行传输资源指示信令。
较佳地, 还包括:
步骤 S604: 上行被调度的用户在第 N帧对控制信道进行解调, 获得对应的上 行传输资源指示信令, 并向 CAP发送业务数据; 在第 N+1帧对控制信道进行解调, 获得对应的下行传输信道资源控制信令信息。
较佳地, 还包括:
步骤 S605: CAP 在接收完对应的上行传输资源中的一个或多个 MAC 分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并将所述一个或者多个 MPDU 的确认应答封装为 MAC层的组确认应答 Group ACK,并在第 N+1帧的下行短信令 信道中发送。
较佳地, 控制信道可以指示上一帧上行被调度的用户对应的本帧的下行短信令 信道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下 行被调度的用户的上行短信令信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例八
本发明实施例八基于实施例五的帧结构提出了一种用于帧确认的方法, 如图 8 所示, 包括:
步骤 S701 : CAP在第 N帧的下行业务数据的调度和资源分配完成后, 为第 N 帧下行被调度的用户, 在第 N帧的上行, 分配相应的上行短信令信道资源, 用于发 送组确认应答 Group ACK。
步骤 S702: CAP根据分配的上行短信令信道资源, 封装对应的反馈资源控制 信令, 该反馈资源控制信令用于指示反馈资源的分配;
步骤 S703: CAP在第 N帧的控制信道发送该反馈资源控制信令, 该反馈资源 控制信令是上行短信令信道资源控制信令。
较佳地, CAP在第 N帧的控制信道还发送下行传输资源指示信令。
较佳地, 还包括:
步骤 S704: 下行被调度的用户 STA在第 N帧对控制信道进行解调, 获得对应 的下行传输资源指示信令信息和上行短信令信道资源控制信令信息。
较佳地, 还包括:
步骤 S705: 下行被调度的用户 STA在接收完对应的下行传输资源中的一个或 多个 MAC分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并将所述一个 或者多个 MPDU的确认应答封装为 MAC层的组确认应答 Group ACK, 并在第 N 帧的上行短信令信道中发送给 CAP。
较佳地, 还包括:
步骤 S706: CAP在第 N帧的上行业务数据调度和资源分配完成后, 为第 N帧 上行被调度的用户, 在第 N+1帧的下行, 分配相应的下行短信令信道资源, 用于发 送组确认应答 Group ACK。
步骤 S707: CAP根据分配的下行短信令信道资源, 封装对应的反馈资源控制 信令;
步骤 S708: CAP在第 N+1帧的控制信道发送该反馈资源控制信令, 该反馈资 源控制信令为下行短信令信道资源控制信令。
较佳地, CAP在第 N+1帧的控制信道还发送上行传输资源指示信令。
较佳地, 还包括:
步骤 S709: 上行被调度的用户在第 N帧对控制信道进行解调, 获得对应的上 行传输资源指示信令信息, 并向 CAP发送业务数据; 在第 N+1 帧对控制信道进行 解调, 获得对应的下行短信令信道资源控制信令信息。
较佳地, 还包括:
步骤 S710: CAP在第 N帧接收完对应的上行传输资源中的一个或多个 MAC 分组后, 生成一个或者多个 MPDU的确认应答, 并将所述一个或者多个 MPDU的 确认应答封装为 MAC层的组确认应答 Group ACK,并在第 N+1帧的下行短信令信 道中发送。
较佳地, 控制信道可以指示上一帧上行被调度的用户对应的本帧的下行短信令 信道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下 行被调度的用户的上行短信令信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例九
本发明实施例九为具体应用实施例。
图 8为应用实例提供的上下行调度传输过程的系统帧结构的示意图。
如图 8所示, 帧被划分前导序列、 系统信息信道、 控制信道、 下行短信令信道、 下行业务传输信道、 下行保护间隔 DGI、 上行探测信道、 上行调度请求信道、 上行 短信令信道、 上行业务传输信道、 上行随机接入信道和上行保护间隔 UGL
其中, 前导序列具体包括短前导和长前导。
某个 CAP关联有 3个 STA: STA1、 STA2和 STA3。
其中, 下行的通用即时 ack策略包括如下步骤:
步骤 S801 : CAP在第 N帧的下行业务数据的调度和资源分配完成后, 为下行 被调度的用户在第 N帧的上行分配相应的反馈资源用于发送 Group ACK, 如图 8 所示, 第 N帧的 CCH里面为 STA ( 1 )或者 STA ( 2 )分配了上行的短信令信道资 源用于发送 Group ACK。
步骤 S802: CAP为上述 ACK的调度结果产生对应的 CCH信令, 并在第 N帧 的 CCH控制信道发送。
步骤 S803: STA ( 1 )或者 STA ( 2 )在第 N帧对控制信道 CCH进行解调, 获 得的对应的下行 TCH资源和上行的 ACK反馈资源。在其接收完对应的 DL-TCH中 的一个或多个 MAC分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并将 所述一个或者多个 MPDU的确认应答封装为 MAC层的组确认应答 Group ACK,并 在分配的上行短信令信道中发送即时型的 Group ACK进行确认。
对于上行的通用即时 ACK策略, 包含如下步骤:
步骤 S804: CAP在第 N帧的上行调度完成时,确定了第 N帧的 UL-TCH的传 输用户为 STA ( 3 ), 那么需要确保在第 N+1帧为第 N帧调度的上行用户 STA ( 3 ) 分配下行资源, 用于发送立即 ACK。 例如图 8中, 第 N帧调度了上行 STA3, 那么 第 N+1帧会为 STA ( 3 )分配 DL短信令资源用于发送立即型 ACK。
步骤 S805: CAP为上述 ACK的调度结果产生对应的 CCH信令, 该信令在第 N+1帧的 CCH控制信道发送。
步骤 S806: STA3在第 N帧解调 CCH之后, 获得的对应的上行 TCH资源, 并在 UL-TCH中发送业务数据。
步骤 S807: CAP在第 N帧, 接收完 STA3的 UL-TCH中的一个或多个 MAC 分组 MPDU 后, 生成一个或者多个 MPDU 的确认应答, 并将所述一个或者多个 MPDU的确认应答封装为 MAC层的组确认应答 Group ACK,并在第 N+1帧的下行 短信令信道中发送 Group ACK。 实施例十
为了实现上述方法, 本发明实施例提供了一种用于帧确认的装置 (网络设备 CAP ), 如图 9所示, 包括:
分配模块 11 , 用于在下行业务数据的调度和资源分配完成后, 在本物理帧的上 行分配反馈资源; 或, 在上行业务数据的调度和资源分配完成后, 在下一帧的下行 分配反馈资源, 以发送组确认应答 Group ACK;
封装模块 12, 用于根据分配的反馈资源, 封装对应的反馈资源控制信令, 该反 馈资源控制信令用于指示反馈资源的分配; 和,
发送模块 13 , 用于在物理帧的控制信道发送该反馈资源控制信令。
较佳地, 反馈资源为: 传输信道资源, 或, 短信令信道资源。
进一步, 下行 ACK策略, 上述装置还可具有以下特点:
分配模块 11 ,具体用于在第 N帧的下行业务数据的调度和资源分配完成后, 为 第 N帧下行被调度的用户,在第 N帧的上行, 分配相应的上行传输信道资源或上行 短信令信道资源, 用于发送 MAC层的组确认应答 GROUP ACK。
封装模块 12 , 具体用于根据分配的上行传输信道资源或上行短信令信道资源, 封装对应的反馈资源控制信道信令;
发送模块 13, 具体用于在第 N帧的控制信道发送该反馈资源控制信令。
进一步, 上行 ACK策略, 上述装置还可具有以下特点:
分配模块 11 ,还用于在第 N帧的上行业务数据的调度和资源分配完成后, 为第 N帧上行被调度的用户, 在第 N+1帧的下行, 分配相应的下行传输信道资源或下行 短信令信道资源, 用于发送组确认应答 Group ACK;
封装模块 12, 还用于根据分配的下行传输信道资源或下行短信令信道资源, 封 装对应的反馈资源控制信令;
发送模块 13, 具体用于在第 N+1帧的控制信道发送该反馈资源控制信令。 如图 10所示, 进一步, 上述装置还包括:
生成模块 14, 用于在接收完对应的上行传输资源中的分组后, 生成一个或者多 个 MPDU的确认应答, 并将所述一个或者多个 MPDU的确认应答封装为 MAC层 的组确认应答 Group ACK;
第二发送模块 15, 用于在第 N+1 帧的下行传输信道或下行短信令信道中发送 该 Group ACK。
进一步, 上述装置还可具有以下特点:
控制信道可以指示上一帧上行被调度的用户对应的本帧的下行传输信道或下行 短信令信道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示 本帧下行被调度的用户的上行传输信道或上行短信令信道的反馈资源分配, 用于 STA发送 Group ACK。 实施例十一
为了实现上述方法, 本发明实施例提供了一种用于帧确认的装置 (终端设备 STA ), 如图 11所示, 包括:
接收模块 21 , 用于接收下行物理帧;
解调模块 22 , 用于对该物理帧的控制信道进行解调, 获得对应的下行传输资源 指示信令信息和反馈资源控制信令信息;
较佳地, 该反馈资源为: 上行传输信道资源或上行短信令信道资源; 较佳地, 还包括:
生成模块 23, 用于在接收完对应的下行传输资源中的一个或多个分组后, 生成 一个或者多个 MPDU的确认应答, 并将所述一个或者多个 MPDU的确认应答封装 为 MAC层的组确认应答 Group ACK; 和,
发送模块 24, 用于在本帧的上行传输信道或上行短信令信道中发送该 Group ACK。 实施例十二
为了实现上述方法, 本发明实施例还提供了一种用于帧确认的装置 (终端设备 STA ), 如图 12所示, 包括:
接收模块 31 , 用于接收下行物理帧;
解调模块 32 , 用于对该物理帧的控制信道进行解调, 获得对应的上行传输资源 指示信令信息, 还用于对下一帧对控制信道进行解调, 获得对应的反馈资源控制信 令信息;
较佳地, 该反馈资源为下行传输信道资源或下行短信令信道资源。 釆用本发明实施例所釆用的方法和装置,在 MAC级实现以 MAC帧的形式进行 数据分组的发送和确认, 该组确认以最低的复杂度为代价, 实现了最低的确认延迟 和很高的可靠性; 短信令信道靠前, 时延小, 反应快, 有利于资源调度和重传的调 度; 并且组聚合帧 G-MPDU很少包含分片, 减少分片的使用。 除非另外具体陈述, 术语比如处理、 计算、 运算、 确定、 显示等等可以指一个 或更多个处理或者计算系统、或类似设备的动作和 /或过程,所述动作和 /或过程将表 示为处理系统的寄存器或存储器内的物理 (如电子)量的数据操作和转换成为类似地 表示为处理系统的存储器、 寄存器或者其他此类信息存储、 发射或者显示设备内的 物理量的其他数据。 信息和信号可以使用多种不同的技术和方法中的任何一种来表 示。 例如, 在贯穿上面的描述中提及的数据、 指令、 命令、 信息、 信号、 比特、 符 号和码片可以用电压、 电流、 电磁波、 磁场或粒子、 光场或粒子或者其任意组合来 表示。
应该明白, 公开的过程中的步骤的特定顺序或层次是示例性方法的实例。 基于 设计偏好, 应该理解, 过程中的步骤的特定顺序或层次可以在不脱离本公开的保护 范围的情况下得到重新安排。 所附的方法权利要求以示例性的顺序给出了各种步骤 的要素, 并且不是要限于所述的特定顺序或层次。
在上述的详细描述中,各种特征一起组合在单个的实施方案中, 以简化本公开。 不应该将这种公开方法解释为反映了这样的意图, 即, 所要求保护的主题的实施方 案需要清楚地在每个权利要求中所陈述的特征更多的特征。 相反, 如所附的权利要 求书所反映的那样, 本发明处于比所公开的单个实施方案的全部特征少的状态。 因 此, 所附的权利要求书特此清楚地被并入详细描述中, 其中每项权利要求独自作为 本发明单独的优选实施方案。
本领域技术人员还应当理解, 结合本文的实施例描述的各种说明性的逻辑框、 模块、 电路和算法步骤均可以实现成电子硬件、 计算机软件或其组合。 为了清楚地 说明硬件和软件之间的可交换性, 上面对各种说明性的部件、 框、 模块、 电路和步 骤均围绕其功能进行了一般地描述。 至于这种功能是实现成硬件还是实现成软件, 取决于特定的应用和对整个系统所施加的设计约束条件。 熟练的技术人员可以针对 每个特定应用, 以变通的方式实现所描述的功能, 但是, 这种实现决策不应解释为 背离本公开的保护范围。
结合本文的实施例所描述的方法或者算法的步骤可直接体现为硬件、 由处理器 执行的软件模块或其组合。 软件模块可以位于 RAM存储器、 闪存、 ROM存储器、 EPROM存储器、 EEPROM存储器、 寄存器、 硬盘、 移动磁盘、 CD-ROM或者本 领域熟知的任何其它形式的存储介质中。 一种示例性的存储介质连接至处理器, 从 而使处理器能够从该存储介质读取信息, 且可向该存储介质写入信息。 当然, 存储 介质也可以是处理器的组成部分。 处理器和存储介质可以位于 ASIC 中。 该 ASIC 可以位于用户终端中。 当然, 处理器和存储介质也可以作为分立组件存在于用户终 端中。
对于软件实现, 本申请中描述的技术可用执行本申请所述功能的模块 (例如, 过 程、 函数等)来实现。 这些软件代码可以存储在存储器单元并由处理器执行。 存储器 单元可以实现在处理器内, 也可以实现在处理器外, 在后一种情况下, 它经由各种 手段以通信方式耦合到处理器, 这些都是本领域中所公知的。
上文的描述包括一个或多个实施例的举例。 当然, 为了描述上述实施例而描述 部件或方法的所有可能的结合是不可能的, 但是本领域普通技术人员应该认识到, 各个实施例可以做进一步的组合和排列。 因此, 本文中描述的实施例旨在涵盖落入 所附权利要求书的保护范围内的所有这样的改变、 修改和变型。 此外, 就说明书或 权利要求书中使用的术语 "包含", 该词的涵盖方式类似于术语 "包括", 就如同 "包 括,"在权利要求中用作衔接词所解释的那样。 此外, 使用在权利要求书的说明书中 的任何一个术语 "或者" 是要表示 "非排它性的或者"。

Claims

权 利 要 求 书
1 . 一种用于帧确认的方法, 其特征在于, 包括:
在下行业务数据的调度和资源分配完成后, 在本物理帧的上行分配反馈资源; 或, 在上行业务数据的调度和资源分配完成后, 在下一帧的下行分配反馈资源, 用 于发送组确认应答 Group ACK;
根据分配的反馈资源, 封装对应的反馈资源控制信令, 该反馈资源控制信令用 于指示反馈资源的分配;
在物理帧的控制信道发送该反馈资源控制信令。
2. 如权利要求 1所述的方法, 其特征在于, 所述反馈资源为: 传输信道资源, 或, 短信令信道资源。
3. 如权利要求 2所述的方法, 其特征在于:
在第 N帧的下行业务数据的调度和资源分配完成后,为第 N帧下行被调度的用 户, 在第 N帧的上行, 分配相应的上行传输信道资源或上行短信令信道资源, 用于 发送 MAC层的组确认应答 Group ACK;
根据分配的上行传输信道资源或上行短信令信道资源, 封装对应的反馈资源控 制信道信令;
在第 N帧的控制信道发送该反馈资源控制信令。
4. 如权利要求 3所述的方法, 其特征在于, 还包括:
下行被调度的用户在第 N帧对控制信道进行解调, 获得对应的下行传输资源指 示信令信息和反馈资源控制信令信息; 其中, 所述反馈资源为: 上行传输信道资源 或上行短信令信道资源。
5. 如权利要求 4所述的方法, 其特征在于, 还包括:
用户在接收完对应的下行传输资源中的一个或多个 MAC分组 MPDU后, 生成 一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认应答 Group ACK,在 第 N帧的上行传输信道或上行短信令信道中发送给 CAP。
6. 如权利要求 2至 5任一项中所述的方法, 其特征在于, 还包括:
在第 N帧的上行业务数据的调度和资源分配完成后,为第 N帧上行被调度的用 户, 在第 N+1帧的下行, 分配相应的下行传输信道资源或下行短信令信道资源, 用 于发送 MAC层的组确认应答 Group ACK;
根据分配的下行传输信道资源或下行短信令信道资源, 封装对应的反馈资源控 制信令;
在第 N+1帧的控制信道发送该反馈资源控制信令。
7. 如权利要求 6所述的方法, 其特征在于, 还包括: 上行被调度的用户在第 N帧对控制信道进行解调, 获得对应的上行传输信道资 源的指示信令信息, 在第 N+1帧对控制信道进行解调, 获得对应的反馈资源控制信 令信息; 其中, 所述反馈资源为: 下行传输信道资源或下行短信令信道资源。
8. 如权利要求 7所述的方法, 其特征在于, 还包括:
CAP 在第 N 帧接收完对应的上行传输信道资源中的一个或多个 MAC 分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认应答 Group ACK, 在第 N+1帧的下行传输信道或下行短信令信道中发送。
9. 如权利要求 1所述的方法, 其特征在于, 所述控制信道能够指示上一帧上行 被调度的用户对应的本帧的下行传输信道或下行短信令信道的反馈资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下行被调度的用户的上行传输 信道或上行短信令信道的反馈资源分配, 用于 STA发送组确认应答 Group ACK。
10. 一种用于帧确认的装置, 其特征在于, 包括:
分配模块, 用于在下行业务数据的调度和资源分配完成后, 在本物理帧的上行 分配反馈资源; 或, 用于在上行业务数据的调度和资源分配完成后, 在下一帧的下 行分配反馈资源, 以发送组确认应答 Group ACK;
封装模块, 用于根据分配的反馈资源, 封装对应的反馈资源控制信令, 所述反 馈资源控制信令用于指示反馈资源的分配; 和,
发送模块, 用于在物理帧的控制信道发送所述反馈资源控制信令。
11 . 如权利要求 10 所述的装置, 其特征在于, 所述反馈资源为: 传输信道资 源, 或, 短信令信道资源。
12. 如权利要求 10或 11所述的装置, 其特征在于:
所述分配模块, 具体用于在第 N帧的下行业务数据的调度和资源分配完成后, 为第 N帧下行被调度的用户,在第 N帧的上行, 分配相应的上行传输信道资源或上 行短信令信道资源, 用于发送 MAC层的组确认应答 Group ACK;
所述封装模块,具体用于根据分配的上行传输信道资源或上行短信令信道资源, 封装对应的反馈资源控制信令;
所述发送模块, 具体用于在第 N帧的控制信道发送该反馈资源控制信令。
13. 如权利要求 10、 11或 12中所述的装置, 其特征在于:
所述分配模块, 还用于在第 N帧的上行业务数据的调度和资源分配完成后, 为 第 N帧上行被调度的用户,在第 N+1帧的下行,分配相应的下行传输信道资源或下 行短信令信道资源, 用于发送组确认应答 Group ACK;
所述封装模块, 还用于根据分配的下行传输信道资源或下行短信令信道资源, 封装对应的反馈资源控制信令;
所述发送模块, 具体用于在第 N+1帧的控制信道发送该反馈资源控制信令。
14. 如权利要求 13所述的装置, 其特征在于, 还包括:
生成模块, 用于在接收完对应的上行传输信道资源中的一个或多个 MAC层分 组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认 应答 Group ACK;
第二发送模块, 用于在第 N+1 帧的下行传输信道或下行短信令信道中发送该 Group ACK。
15. 如权利要求 10 所述的装置, 其特征在于, 所述控制信道能够指示上一帧 上行被调度的用户对应的本帧的下行传输信道或下行短信令信道的资源分配, 用于 CAP发送组确认应答 Group ACK; 和 /或, 指示本帧下行被调度的用户的上行传输 信道或上行短信令信道的资源分配, 用于 STA发送 Group ACK。
16. 一种用于帧确认的装置, 其特征在于, 包括:
接收模块, 用于接收下行物理帧;
解调模块, 用于对该物理帧的控制信道进行解调, 获得对应的下行传输资源指 示信令信息和反馈资源控制信令信息。
17. 如权利要求 16 所述的装置, 其特征在于, 所述反馈资源为: 上行传输信 道资源或上行短信令信道资源。
18. 如权利要求 17所述的装置, 其特征在于, 还包括:
生成模块, 用于在接收完对应的下行传输资源中的一个或多个 MAC 层分组 MPDU后, 生成一个或者多个 MPDU的确认应答, 并封装为 MAC层的组确认应答 Group ACK; 和,
发送模块, 用于在本帧的上行传输信道或上行短信令信道中发送该 Group ACK。
19. 一种用于帧确认的装置, 其特征在于, 包括:
接收模块, 用于接收下行物理帧;
解调模块, 用于对该物理帧的控制信道进行解调, 获得对应的上行传输资源指 示信令信息, 还用于对下一帧的控制信道进行解调, 获得对应的反馈资源控制信令 信息。
20. 如权利要求 19 所述的装置, 其特征在于, 所述反馈资源为: 下行传输信 道资源或下行短信令信道资源。
PCT/CN2013/081214 2013-08-09 2013-08-09 一种用于帧确认的方法和装置 WO2015018078A1 (zh)

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