WO2016106489A1 - 传输帧的发送、接收方法及装置、设备 - Google Patents
传输帧的发送、接收方法及装置、设备 Download PDFInfo
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- 230000010076 replication Effects 0.000 claims abstract description 54
- 238000010586 diagram Methods 0.000 description 31
- 238000013468 resource allocation Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- 238000012549 training Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
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- 230000006872 improvement Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000003362 replicative effect Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and a device and a device for transmitting and receiving a transmission frame.
- an access point (English: Access Point, AP for short) is used to transmit a transmission frame between one or more stations (English: Station, abbreviated as STA)
- STA stations
- some STAs may not be accurate due to channels and other reasons.
- the AP may not be able to accurately receive the transmission frame sent by the STA.
- an AP needs to first transmit a trigger frame (Trigger frame) to multiple STAs to be scheduled to allocate uplink transmissions of these STAs. Or the downlink received resource, that is, the AP simultaneously schedules multiple STAs to transmit uplink or downlink on different subchannels.
- the AP sends a Trigger frame, where the uplink and downlink resource scheduling information of the subsequent multiple STAs is included; the scheduled STA transmits or receives according to the content in the Trigger frame at the corresponding time and frequency band.
- the Trigger frame can also schedule only UL-only, or only DL-only, or schedule uplink and downlink simultaneously.
- MIMO multi-user multiple input multiple output
- the receiving object of the Trigger frame is a plurality of users to be scheduled. If some of the users fail to receive the Trigger frame correctly, all subsequent scheduling for the user is invalid, and the corresponding resources are wasted. Therefore, it is particularly important to improve the reliability of the Trigger frame.
- Trigger frame as an example to illustrate the problem of unreliable transmission between the AP and the STA.
- the problem of unreliable transmission exists in the transmission of any type of frame. Therefore, it is necessary to improve the frame transmission between the access point and the station.
- the reliability is only in the multicast scene like Trigger frame, the transmission reliability problem of the frame is particularly prominent.
- the method for improving the reliability of frame transmission is to use a lower modulation coding scheme (English: Modulation and Coding Scheme, MCS for short), that is, a lower modulation rate and a channel coding rate.
- MCS Modulation and Coding Scheme
- the lowest MCS in 802.11ac is MCS0, that is, the code rate is 1/2
- the modulation mode is Binary Phase Shift Keying (English: Binary Phase Shift Keying, BPSK).
- BPSK Binary Phase Shift Keying
- 802.11ah a more The low-order MCS repeats the result of the modulation coding of MCS0 to enhance reliability.
- the essence of this lower-order MCS is to introduce more redundancy in exchange for the improvement of reliability, but it will lead to an increase in the amount of data to be transmitted, a longer transmission time, and a lower transmission efficiency.
- a non-HT duplicate transmission method is proposed in 802.11n, as shown in Figure 1.
- First construct a 20MHz transmission frame, then copy it on multiple 20MHz channels, and then send it out.
- the purpose of non-HT duplicate is to reserve a wider channel. For example, when an 802.11ac device intends to transmit to another 802.11ac device using 80 MHz, four request-to-send (English: Request to Send, RTS) frames are transmitted in a non-HT duplicate manner on the 80 MHz channel.
- RTS Request to Send
- any other third-party device hears the RTS on its own basic channel (the basic channel of different cells may be different), it can know that the other party will use the channel at a later time, so it will not Actively go to the competition channel, so as not to cause interference to the other party's transmission.
- non-HT duplicate does not have the ability to improve transmission reliability, because for a receiving user, when it receives a transmission frame on a 20MHz channel, it is impossible to know whether the frame is also It was copied on other channels and copied on which channels. Therefore, even if the transmitting end actually copies the frame over multiple 20 MHz, the receiving end cannot use these copies for merging to improve reliability.
- the embodiment of the invention provides a method and a device and a device for transmitting and receiving a transmission frame, so as to improve the reliability of frame transmission between the transmitting end and the receiving end.
- a method for transmitting a transmission frame including:
- the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap of a transmission subchannel used for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly form a transmission of the transmission The transmission channel of the frame.
- the at least one field after the first signaling field of the transmission frame includes: the first part of the transmission frame All fields after a signaling field, or, a data field, or a second signaling field, or a data field and a second signaling field.
- the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
- a method for receiving a transmission frame including:
- each of the at least one copy One copy corresponds to a specific bandwidth in the transport channel
- the received at least one copy is decoded.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is used to transmit the transmission a bitmap of a transmission subchannel of the input frame, all of the transmission subchannels indicated by the bitmap together constitute a transmission channel for transmitting the transmission frame, and the transmission channel indicated by the bandwidth information according to the copy indication information Receiving at least one copy of at least one field subsequent to the first signaling field of the copied transmission frame, including:
- the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
- a field includes: all fields following the first signaling field of the transmission frame, or a data field, or a second signaling field, or a data field and a second signaling field.
- a third aspect provides a transmitting apparatus for transmitting a frame, including:
- a generating unit configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame;
- a copying unit configured to perform frequency domain copying at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth information Indicated transmission channel frequency bandwidth;
- a sending unit configured to send the copied transmission on a transport channel indicated by the bandwidth information Incoming frames.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap of a transmission subchannel for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly constitute a transmission channel for transmitting the transmission frame.
- the at least one field after the first signaling field of the transmission frame includes: the first information of the transmission frame Let all fields after the field, or, the data field, or the second signaling field, or the data field and the second signaling field.
- the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
- a fourth aspect provides a receiving device for transmitting a frame, including:
- a detecting unit configured to detect, in a first signaling field of the transmission frame, a copy indication signal of the transmission frame Information and bandwidth information;
- a receiving unit configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on a transport channel indicated by the bandwidth information, where the at least one copy Each copy of a copy corresponds to a particular bandwidth in the transport channel;
- a first decoding unit configured to decode the received at least one copy.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap for transmitting a transmission subchannel of the transmission frame, where all transmission subchannels indicated by the bitmap form a transmission of the transmission frame Transmission channel, the receiving device is specifically used to:
- the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
- the at least after the first signaling field of the transmission frame A field includes: all fields following the first signaling field of the transmission frame, or a data field, or a second signaling field, or a data field and a second signaling field.
- the first decoding unit includes:
- a merging unit configured to merge the received at least one copy
- a second decoding unit configured to decode the combined transmission frame.
- a fifth aspect provides a transmitting device for transmitting a frame, including: a processor and a transmitter;
- the processor is configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame;
- the processor is further configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth.
- the transmitter is configured to send the copied transmission frame on a transmission channel indicated by the bandwidth information.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate at least one after the first signaling field of the transmission frame.
- the frequency domain bandwidth unit when the fields are used for frequency domain replication.
- the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap of a transmission subchannel used for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly form a transmission of the transmission The transmission channel of the frame.
- the at least one field after the first signaling field of the transmission frame includes: the first information of the transmission frame Let all fields after the field, or, the data field, or the second signaling field, or the data field and the second signaling field.
- the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
- a sixth aspect provides a receiving device for transmitting a frame, including: a processor and a receiver;
- the processor is configured to detect, in a first signaling field of a transmission frame, replication indication information and bandwidth information of the transmission frame;
- the receiver is configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on a transport channel indicated by the bandwidth information, where the at least one copy Each copy of a copy corresponds to a particular bandwidth in the transport channel;
- the processor is further configured to decode the received at least one copy.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether at least one after the first signaling field of the transmission frame Fields are used for frequency domain replication.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap for transmitting a transmission subchannel of the transmission frame, where all transmission subchannels indicated by the bitmap form a transmission of the transmission frame Transport channel, the receiver is specifically used to:
- the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
- the at least after the first signaling field of the transmission frame A field includes: all fields following the first signaling field of the transmission frame, or a data field, or a second signaling field, or a data field and a second signaling field.
- the step of the processor performing the decoding of the received at least one copy including:
- the transmitting end carries the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be sent, according to the copy indication information.
- At least one field after the first signaling field of the transmission frame is frequency-domain-copied in units of a specific bandwidth, such that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the transmission channel indicated by the bandwidth information.
- the transmission frame after the transmission is sent, so that the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the reliability of data transmission in the transmission frame between the transmitting end and the receiving end.
- FIG. 1 is a schematic diagram of a transmission mode of a transmission frame in the prior art
- FIG. 2 is a schematic flowchart of a method for transmitting a transmission frame according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of replication of a transmission frame
- FIG. 5 is a schematic diagram of modulation coding of an MCS32 in the prior art
- Figure 6 is a schematic diagram of replication of another transmission frame
- Figure 7 is a schematic diagram of replication of another transmission frame
- Figure 8 is a schematic diagram of replication of another transmission frame
- Figure 9 is a schematic diagram of replication of another transmission frame
- FIG. 10 is a schematic flowchart diagram of a method for receiving a transmission frame according to an embodiment of the present disclosure
- FIG. 11 is a schematic structural diagram of a device for transmitting a transmission frame according to an embodiment of the present invention.
- FIG. 12 is a schematic structural diagram of a device for receiving a transmission frame according to an embodiment of the present invention.
- FIG. 13 is a schematic structural diagram of a sending device for transmitting a frame according to an embodiment of the present disclosure
- FIG. 14 is a schematic structural diagram of a receiving device for transmitting a frame according to an embodiment of the present invention.
- FIG. 2 is a schematic flowchart of a method for transmitting a transmission frame according to an embodiment of the present invention, where the method includes the following steps:
- Step S101 Generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame.
- the sending end may be an AP
- the receiving end is one or more STAs
- the sending end may also be a STA
- the receiving end is an AP
- the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
- an AP advertises a specific 20 MHz basic channel to its associated users
- the receiving end generally listens to the basic channel.
- the transmitting end generates a transmission frame to be transmitted, and the transmission frame includes a first signaling field, and of course, a data field and the like.
- the transmitting end writes the copy indication information and the bandwidth information in the first signaling field, where the copy indication information may include a copy indication, configured to indicate whether to transmit one or more fields after the first signaling field of the transmission frame Domain replication; this bandwidth information indicates the transmission channel frequency bandwidth that the replicated transmission frame should fill.
- the first signaling field and all the fields before it are copied and transmitted in the frequency domain in units of 20 MHz, and the first signaling field Subsequent other fields are transmitted in the manner indicated by the first signaling field.
- Step S102 Perform, according to the copy indication information, at least one field subsequent to the first signaling field of the transmission frame in a specific bandwidth unit, so that the copied transmission frame is filled with the bandwidth information.
- Transmission channel frequency bandwidth
- the field to be copied is frequency-domain-copied in units of a specific bandwidth, and then the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information.
- the specific bandwidth is 20 MHz and the transmission channel frequency bandwidth is 80 MHz
- the first letter of the transmission frame should be One or more fields after the field are copied four times, so that the copied transmission frame is filled with the transmission channel frequency bandwidth of 80 MHz.
- Step S103 transmitting the copied transmission frame on a transmission channel indicated by the bandwidth information.
- the transmitting end After the preparation of the transmission frame and the partial or all fields after the first signaling field in the transmission transmission frame is completed, the transmitting end transmits the copied transmission frame on the transmission channel indicated by the bandwidth information, so that the receiving end When receiving, if it is detected that the copy indication information and the bandwidth information are in the first signaling field, the receiving end may determine the first signaling of the transmission frame received on the transmission channel frequency bandwidth indicated by the bandwidth information.
- the merging technique can be any combination of techniques, such as selective merging, maximum ratio merging, depending on the selection and implementation of the receiving end.
- a replication frame of a transmission frame is configured by using a physical layer convergence procedure protocol data unit (PPDU) as shown in FIG. 3.
- the PPDU includes an old pilot (L-preamble), a first signaling field (HE-SIG-A), a short training field (HE-STF), a long training field (HE-LTF), and a data field (Data).
- a second signaling field (HE-SIG-B) may also be included.
- the first signaling field includes a bandwidth (English: Bandwidth, BW for short) and a duplicate indication.
- the BW can be set to N ⁇ 20 MHz, where the specific bandwidth is 20 MHz, where The specific bandwidth is a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end does not need to re-notify the receiving end.
- N does not represent the number of transmission channels, and it can be understood that the frequency of the transmission channel full of N ⁇ 20 MHz needs to be N times.
- the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
- the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver. Of course, it can also be explicitly performed in the first signaling field.
- the identifier that is, the first signaling field contains identification information of one or more fields for performing frequency domain copying. Then, one or more fields after the first signaling field of the above 20 MHz PPDU are copied on the N ⁇ 20 MHz transmission channel frequency bandwidth, and the copied transmission frame is transmitted on the N ⁇ 20 MHz transmission channel frequency bandwidth.
- the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
- the transmission frame is a Trigger frame, and the data field contains scheduling information.
- the constellation mapping may have phase rotation, in order to reduce the peak to average power ratio (English: Peak to Average Power Ratio, referred to as: PAPR). This is a general-purpose technology in the current standard where the bandwidth is greater than 20 MHz, and will not be particularly emphasized later.
- the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in FIG. A copy of the transmission frame, in which the third 20 MHz is unused, in which case the receiving end should exclude unused subbands when performing reception or combining operations.
- FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
- a modulation coding method called MCS32 is proposed.
- MCS modulation coding method
- the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only a fixed MCS can be used (because the MCS field in the HT-SIG has been set to 32, it cannot be used to indicate the Data portion.
- MCS32 is 20MHz
- Other modulation and coding methods due to the use of the combined technology to improve the signal to interference plus noise ratio (English: Signal to Interference plus Noise Ratio, referred to as: SINR), the Data part may use a higher MCS.
- SINR Signal to Interference plus Noise Ratio
- the embodiment of the present invention improves it. Please refer to the replication diagram of another transmission frame shown in FIG. 6 and FIG. 7.
- FIG. 6 when the channel condition is good, copy in the 80 MHz bandwidth in units of 40 MHz. Two times is a better choice to reduce the time domain transmission time and improve transmission efficiency;
- Fig. 7 when the channel conditions are poor, copying in units of 20 MHz may not be sufficient, and copying in units of 10 MHz can ensure reliability. Therefore, the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
- the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit
- the non-replicating PPDU structure can be seen as a special case of the copy PPDU structure.
- the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
- the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
- BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
- the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
- the solution designed by the present invention is not limited to the resource scheduling frame, but can be used for any transmission frame to improve the reliability of the transmission.
- the AP needs to reply to the STAs with an acknowledgement frame, that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important. At this time, the transmission of the confirmation frame can also adopt the manner of the present invention. send.
- an acknowledgement frame that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important.
- the transmission of the confirmation frame can also adopt the manner of the present invention. send.
- the invention is also not limited to multi-user transmissions, but may be transmissions between an AP and a single STA.
- the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency field copying in units of a specific bandwidth, so that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
- the receiving end can reliably receive the data in the field copied in the transmission frame, and improves the reliability field of the transmission of the data in the transmission frame between the transmitting end and the receiving end.
- FIG. 10 is a schematic flowchart of a method for receiving a transmission frame according to an embodiment of the present invention, where the method includes the following steps:
- Step S201 detecting replication indication information and bandwidth information of the transmission frame in a first signaling field of the transmission frame.
- the sending end may be an AP
- the receiving end is one or more STAs
- the sending end may also be a STA
- the receiving end is an AP
- the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
- an AP advertises a specific 20 MHz basic channel to its associated users
- the receiving end generally listens to the basic channel.
- the receiving end first detects, on the basic channel, whether the first signaling field of the transmission frame includes the copy indication information and the bandwidth information, where the transmission frame includes the first signaling field, and of course, the data field and the like.
- the copy indication information may include a copy indication, configured to indicate whether to perform frequency domain copying on one or more fields subsequent to the first signaling field of the transmission frame, where the copy indication information may further include the transmission frame of the copy Identification information of at least one field following the first signaling field; the bandwidth information refers to a transmission channel frequency bandwidth that the copied transmission frame should be full.
- At least one field following the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling field, or, a data field and a second signaling Field.
- the first signaling field of the transmitting end and all the previous fields thereof are copied and transmitted in the frequency domain in units of 20 MHz, and the first letter The other fields following the field are transmitted in the manner indicated by the first signaling field.
- Step S202 receiving, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on the transport channel indicated by the bandwidth information, the at least one copy Each of the copies corresponds to a particular bandwidth in the transport channel.
- the at least one field is specified by a protocol, or the two parties negotiate in advance, receiving one or more of at least one field after the first signaling field of the copied transmission frame on the transmission channel indicated by the bandwidth information Copies.
- At least one field is indicated by the identification information in the copy indication information, after receiving the first signaling field of the copied transmission frame indicated by the identification information, on the transmission channel indicated by the bandwidth information One or more copies of at least one field.
- the specific bandwidth may be a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end may not need to re-notify the receiving end.
- the copy indication information includes a specific bandwidth used to indicate a frequency domain bandwidth unit when frequency domain copying is performed on at least one field subsequent to the first signaling field of the transmission frame.
- Step S203 decoding the received at least one copy.
- the receiving end decodes multiple copies of the copied field in the received transmission frame, specifically, combining the copies by using a merge technique, and then decoding the combined transmission frame, so that the copy can be accurately and reliably received.
- the content of the field thereby improving the reliability of data transmission in the transmission frame between the sender and the receiver.
- the merging technique can be any merging technique, such as merging, that is, the receiving end receives on a specific bandwidth, for example, the specific bandwidth is 20 MHz, and if any of the 20 MHz decoding is correct, the frame transmission is successful; Merging, that is, the receiving end combines multiple copies of the received fields on the 20 MHz and then decodes them.
- the specific combining technique depends on the selection and implementation of the receiving end.
- the specific bandwidth herein may also be a frequency domain bandwidth unit for indicating frequency domain copying of at least one field after the first signaling field of the transmission frame, which will be described in detail later.
- a schematic diagram of a transmission frame is transmitted, and the transmission frame adopts a PPDU structure as shown in FIG. 3.
- the PPDU includes L-preamble, HE-SIG-A, HE-STF, HE-LTF, and Data, and may also include HE-SIG-B.
- the first signaling field includes a BW and a copy indication.
- the BW may be set to be N ⁇ 20 MHz, where the transmitting end frequency-transmits one or more fields after the HE-SIG-A with a specific bandwidth. Domain replication, the specific bandwidth is 20MHz.
- the specific bandwidth is the preset bandwidth, that is, the bandwidth that the sender and the receiver have pre-negotiated, or The pre-defined bandwidth, the sender may not need to re-notify the receiver, and the receiver receives a copy of the copied field according to the preset bandwidth agreed by the protocol.
- the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
- the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver.
- the identifier may also be explicitly identified in the first signaling field, that is, the first signaling field includes identification information of one or more fields for performing frequency domain replication.
- the receiving end decodes multiple copies of the received copied field according to the protocol convention or according to the identification information.
- the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
- the transmission frame is a Trigger frame, and the data field contains scheduling information.
- the bandwidth and copy indication are located in the unique HE-SIG field.
- the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in another transmission frame of FIG.
- the bandwidth information is a bitmap of the transmission subchannel of the transmission transmission frame, all the transmission subchannels indicated by the bitmap together constitute a transmission channel for transmitting the transmission frame, and step S202 is specifically: the transmission indicated by the bitmap At least one copy of at least one field following the first signaling field of the replicated transmission frame is received on the channel.
- FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
- a modulation coding method called MCS32 is proposed.
- MCS modulation coding method
- the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only fixed MCS can be used (because of the MCS word in the HT-SIG)
- MCS32 is 20MHz
- MCS maximum frequency division multiple access
- the segment has been set to 32 and cannot be used to indicate other modulation and coding modes of the Data section).
- SINR Signal to Interference plus Noise Ratio
- the embodiment of the present invention improves it.
- the transmitting end has a bandwidth of 80 MHz in units of 40 MHz. Copying twice is a better choice, which can reduce the time domain transmission time and improve the transmission efficiency.
- the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
- the receiving end decodes the copy of the received copied field according to the BU.
- the bandwidth of the basic channel negotiated by the transmitting end and the receiving end is constant, for example, 20 MHz, however, the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit.
- L-premble and HE-SIG-A remain unchanged, and the transmission is replicated in units of a basic channel bandwidth of 20 MHz, and only the subsequent fields are copied and transmitted.
- the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
- the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
- BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
- the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
- the receiving end decodes the copy of the received copied field according to the copy indication information.
- the solution designed by the present invention is not limited to the resource scheduling frame, but can be used for any transmission frame to improve the reliability of the transmission.
- a method for receiving a transmission frame according to an embodiment of the present invention where the transmitting end passes the transmission to be transmitted
- the first signaling field of the frame carries a copy indication message and bandwidth information, and according to the copy indication information, at least one field after the first signaling field of the transmission frame is frequency-domain copied in a specific bandwidth, so that the copied transmission is performed.
- the frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information, so that the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the transmission.
- the reliability of the transmission of data in the transmission frame between the terminal and the receiving end.
- FIG. 11 is a schematic structural diagram of a device for transmitting a transmission frame according to an embodiment of the present invention.
- the device 1000 includes:
- the generating unit 11 is configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame.
- the sending end may be an AP
- the receiving end is one or more STAs
- the sending end may also be a STA
- the receiving end is an AP
- the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
- an AP advertises a specific 20 MHz basic channel to its associated users
- the receiving end generally listens to the basic channel.
- the generating unit 11 generates a transmission frame to be transmitted, the transmission frame including a first signaling field, and of course, a data field and the like thereafter.
- the transmitting end writes the copy indication information and the bandwidth information in the first signaling field, where the copy indication information may include a copy indication, configured to indicate whether to transmit one or more fields after the first signaling field of the transmission frame Domain replication; this bandwidth information indicates the transmission channel frequency bandwidth that the replicated transmission frame should fill.
- the first signaling field and all the fields before it are copied and transmitted in the frequency domain in units of 20 MHz, and the first signaling field Subsequent other fields are transmitted in the manner indicated by the first signaling field.
- the copying unit 12 is configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth information.
- the indicated transmission channel frequency bandwidth is configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth information.
- the copy unit 12 performs frequency domain copying of the field to be copied in units of a specific bandwidth according to the copy indication information, and then the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information. For example, if the specific bandwidth is 20 MHz and the transmission channel frequency bandwidth is 80 MHz, the transmission should be One or more fields following the first signaling field of the frame are replicated four times such that the copied transmission frame is full of the 80 MHz transmission channel frequency bandwidth.
- the sending unit 13 is configured to send the copied transmission frame on a transport channel indicated by the bandwidth information.
- the transmitting unit 13 transmits the copied information on the transmission channel indicated by the bandwidth information. Transmitting a frame, so that when receiving the receiving end, if the copy indication information and the bandwidth information are detected in the first signaling field, the receiving end may determine that the received channel frequency bandwidth indicated by the bandwidth information is received.
- the merging technique can be any combination of techniques, such as selective merging, maximum ratio merging, depending on the selection and implementation of the receiving end.
- a replication frame of a transmission frame is configured by using a physical layer convergence procedure protocol data unit (PPDU) as shown in FIG. 3.
- the PPDU includes an old pilot (L-preamble), a first signaling field (HE-SIG-A), a short training field (HE-STF), a long training field (HE-LTF), and a data field (Data).
- a second signaling field (HE-SIG-B) may also be included.
- the first signaling field includes a bandwidth (English: Bandwidth, BW for short) and a duplicate indication.
- the BW can be set to N ⁇ 20 MHz, where the specific bandwidth is 20 MHz, where The specific bandwidth is a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end does not need to re-notify the receiving end.
- N does not represent the number of transmission channels, and it can be understood that the frequency of the transmission channel full of N ⁇ 20 MHz needs to be N times.
- the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
- the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver. Of course, it can also be explicitly performed in the first signaling field.
- the identifier that is, the first signaling field contains identification information of one or more fields for performing frequency domain copying. Then, one or more fields after the first signaling field of the above 20 MHz PPDU are copied on the N ⁇ 20 MHz transmission channel frequency bandwidth, and the copied transmission frame is transmitted on the N ⁇ 20 MHz transmission channel frequency bandwidth.
- the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
- the transmission frame is a Trigger frame, and the data field contains scheduling information.
- the constellation mapping may have phase rotation, in order to reduce the peak to average power ratio (English: Peak to Average Power Ratio, referred to as: PAPR). This is a general-purpose technology in the current standard where the bandwidth is greater than 20 MHz, and will not be particularly emphasized later.
- the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in FIG. A copy of the transmission frame, in which the third 20 MHz is unused, in which case the receiving end should exclude unused subbands when performing reception or combining operations.
- FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
- a modulation coding method called MCS32 is proposed.
- MCS modulation coding method
- the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only a fixed MCS can be used (because the MCS field in the HT-SIG has been set to 32, it cannot be used to indicate the Data portion.
- MCS32 is 20MHz
- Other modulation and coding methods due to the use of the combined technology to improve the signal to interference plus noise ratio (English: Signal to Interference plus Noise Ratio, referred to as: SINR), the Data part may use a higher MCS.
- SINR Signal to Interference plus Noise Ratio
- the embodiment of the present invention improves it. Please refer to the replication diagram of another transmission frame shown in FIG. 6 and FIG. 7.
- FIG. 6 when the channel condition is good, copy in the 80 MHz bandwidth in units of 40 MHz. Two times is a better choice to reduce the time domain transmission time and improve transmission efficiency;
- Fig. 7 when the channel conditions are poor, copying in units of 20 MHz may not be sufficient, and copying in units of 10 MHz can ensure reliability. Therefore, the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
- the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit
- the non-replicating PPDU structure can be seen as a special case of the copy PPDU structure.
- the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
- the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
- BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
- the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
- the solution designed by the present invention is not limited to the resource scheduling frame, but can be used for any transmission frame to improve the reliability of the transmission.
- the AP needs to reply to the STAs with an acknowledgement frame, that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important. At this time, the transmission of the confirmation frame can also adopt the manner of the present invention. send.
- an acknowledgement frame that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important.
- the transmission of the confirmation frame can also adopt the manner of the present invention. send.
- the invention is also not limited to multi-user transmissions, but may be transmissions between an AP and a single STA.
- the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency field copying in units of a specific bandwidth, so that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
- the receiving end can reliably receive the data in the field copied in the transmission frame, and improves the reliability field of the transmission of the data in the transmission frame between the transmitting end and the receiving end.
- FIG. 12 is a schematic structural diagram of a device for receiving a transmission frame according to an embodiment of the present invention.
- the device 2000 includes:
- the detecting unit 21 is configured to detect the copy indication information and the bandwidth information of the transmission frame in a first signaling field of the transmission frame.
- the sending end may be an AP
- the receiving end is one or more STAs
- the sending end may also be a STA
- the receiving end is an AP
- the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
- an AP advertises a specific 20 MHz basic channel to its associated users
- the receiving end generally listens to the basic channel.
- the detecting unit 21 first detects, on the basic channel, whether the first signaling field of the transmission frame includes copy indication information and bandwidth information, and the transmission frame includes a first signaling field, and of course, a data field and the like.
- the copy indication information may include a copy indication, configured to indicate whether to perform frequency domain copying on one or more fields subsequent to the first signaling field of the transmission frame, where the copy indication information may further include the transmission frame of the copy Identification information of at least one field following the first signaling field; the bandwidth information refers to a transmission channel frequency bandwidth that the copied transmission frame should be full.
- At least one field following the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling field, or, a data field and a second signaling Field.
- the first signaling field of the transmitting end and all the previous fields thereof are copied and transmitted in the frequency domain in units of 20 MHz, and the first letter The other fields following the field are transmitted in the manner indicated by the first signaling field.
- the receiving unit 22 is configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on the transport channel indicated by the bandwidth information, Each of the at least one copy corresponds to a particular one of the transmission channels.
- the receiving unit 22 receives at least one field after the first signaling field of the copied transmission frame on the transmission channel indicated by the bandwidth information. One or more copies.
- the receiving unit 22 receives the first letter of the copied transmission frame indicated by the identification information on the transmission channel indicated by the bandwidth information. One or more copies of at least one field following the field.
- the specific bandwidth may be a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end may not need to re-notify the receiving end.
- the copy indication information includes a specific bandwidth used to indicate a frequency domain bandwidth unit when frequency domain copying is performed on at least one field subsequent to the first signaling field of the transmission frame.
- the first decoding unit 23 is configured to decode the received at least one copy.
- the first decoding unit 23 decodes multiple copies of the copy field in the transmission frame received by the receiving unit 22, specifically, the first decoding unit 23 includes: a merging unit and a second decoding unit, and a merging unit for receiving The at least one copy to be merged; the second decoding unit is configured to decode the combined transmission frame.
- the merge technique is used to combine the copies, and then the combined transmission frames are decoded, so that the contents of the copied fields can be accurately and reliably received, thereby improving the data transmission in the transmission frame between the transmitting end and the receiving end. reliability.
- the merging technique can be any merging technique, such as merging, that is, the receiving end receives on a specific bandwidth, for example, the specific bandwidth is 20 MHz, and if any of the 20 MHz decoding is correct, the frame transmission is successful; Merging, that is, the receiving end combines multiple copies of the received fields on the 20 MHz and then decodes them.
- the specific combining technique depends on the selection and implementation of the receiving end.
- the specific bandwidth herein may also be a frequency domain bandwidth unit for indicating frequency domain copying of at least one field after the first signaling field of the transmission frame, which will be described in detail later.
- a schematic diagram of a transmission frame is transmitted, and the transmission frame adopts a PPDU structure as shown in FIG. 3.
- the PPDU includes L-preamble, HE-SIG-A, HE-STF, HE-LTF, and Data, and may also include HE-SIG-B.
- the first signaling field includes BW and
- the BW can be set to N ⁇ 20 MHz, wherein the transmitting end performs frequency domain copying on one or more fields after the HE-SIG-A with a specific bandwidth of 20 MHz, where the specific bandwidth is The preset bandwidth, that is, the bandwidth that has been pre-negotiated by the sender and the receiver, or the bandwidth pre-defined by the protocol, the sender may not need to re-notify the receiver, and the receiver receives a copy of the copied field according to the preset bandwidth agreed by the protocol.
- the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
- the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver.
- the identifier may also be explicitly identified in the first signaling field, that is, the first signaling field includes identification information of one or more fields for performing frequency domain replication.
- the receiving end decodes multiple copies of the received copied field according to the protocol convention or according to the identification information.
- the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
- the transmission frame is a Trigger frame, and the data field contains scheduling information.
- the bandwidth and copy indication are located in the unique HE-SIG field.
- the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in another transmission frame of FIG.
- FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
- a modulation coding method called MCS32 is proposed.
- MCS modulation coding method
- the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only a fixed MCS can be used (because the MCS field in the HT-SIG has been set to 32, it cannot be used to indicate the Data portion.
- MCS32 is 20MHz
- Other modulation and coding methods due to the use of the combined technology to improve the signal to interference plus noise ratio (English: Signal to Interference plus Noise Ratio, referred to as: SINR), the Data part may use a higher MCS.
- SINR Signal to Interference plus Noise Ratio
- the embodiment of the present invention improves it.
- the transmitting end has a bandwidth of 80 MHz in units of 40 MHz. Copying twice is a better choice, which can reduce the time domain transmission time and improve the transmission efficiency.
- the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
- the receiving end decodes the copy of the received copied field according to the BU.
- the bandwidth of the basic channel negotiated by the transmitting end and the receiving end is constant, for example, 20 MHz, however, the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit.
- L-premble and HE-SIG-A remain unchanged, and the transmission is replicated in units of a basic channel bandwidth of 20 MHz, and only the subsequent fields are copied and transmitted.
- the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
- the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
- BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
- the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
- the receiving end decodes the copy of the received copied field according to the copy indication information.
- the solution designed by the present invention is It is not limited to resource scheduling frames, but can be used for any transmission frame to improve the reliability of its transmission.
- the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency domain copying in a specific bandwidth, such that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
- the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the reliability of data transmission in the transmission frame between the transmitting end and the receiving end.
- FIG. 13 is a schematic structural diagram of a transmitting device for transmitting a frame according to an embodiment of the present invention, where the sending device 3000 includes: a processor 31 and a transmitter 32;
- the processor is configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame;
- the processor is further configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth.
- the transmitter is configured to send the copied transmission frame on a transmission channel indicated by the bandwidth information.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identifier information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap of a transmission subchannel for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly constitute a transmission channel for transmitting the transmission frame.
- At least one field after the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling Field, or, data field and second signaling field.
- the copy indication information includes at least two bit information of a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying of at least one field after the first signaling field of the transmission frame.
- the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency field copying in units of a specific bandwidth, so that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
- the receiving end can reliably receive the data in the field copied in the transmission frame, and improves the reliability field of the transmission of the data in the transmission frame between the transmitting end and the receiving end.
- FIG. 14 is a schematic structural diagram of a receiving device for transmitting a frame according to an embodiment of the present invention, where the receiving device 4000 includes: a processor 41 and a receiver 42;
- the processor is configured to detect, in a first signaling field of a transmission frame, replication indication information and bandwidth information of the transmission frame;
- the receiver is configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on a transport channel indicated by the bandwidth information, where the at least one copy Each copy of a copy corresponds to a particular bandwidth in the transport channel;
- the processor is further configured to decode the received at least one copy.
- the copy indication information includes a copy indication
- the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
- the specific bandwidth is a preset bandwidth.
- the copy indication information includes the specific bandwidth
- the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
- the copy indication information further includes identifier information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
- the bandwidth information is a bitmap for transmitting a transmission subchannel of the transmission frame, where all transmission subchannels indicated by the bitmap jointly constitute a transmission channel for transmitting the transmission frame,
- the receiver is specifically used to:
- the copy indication information includes at least two bit information of a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying of at least one field after the first signaling field of the transmission frame.
- At least one field after the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling Field, or, data field and second signaling field.
- step of the processor performing the decoding of the received at least one copy comprises:
- the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency domain copying in a specific bandwidth, such that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
- the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the reliability of data transmission in the transmission frame between the transmitting end and the receiving end.
- Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
- a storage medium may be any available media that can be accessed by a computer.
- the computer readable medium may include a random access memory (RAM), a read-only memory (ROM), and an electrically erasable programmable read-only memory (Electrically Erasable Programmable).
- EEPROM Electrically Error Read-Only Memory
- CD-ROM Compact Disc Read-Only Memory
- Any connection may suitably be a computer readable medium.
- the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, Then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the associated medium.
- DSL Digital Subscriber Line
- a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.
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Abstract
本发明实施例公开了传输帧的发送、接收方法及装置、设备,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性。
Description
本发明涉及通信技术领域,尤其涉及传输帧的发送、接收方法及装置、设备。
接入点(英文:Access Point,简称:AP)与AP下的一个或多个站点(英文:Station,简称:STA)之间进行传输帧的传输时,某些STA可能因为信道等原因无法准确地接收到AP发送的传输帧,AP也有可能无法准确地接收到STA发送的传输帧。
例如,在正交频分复用(英文:Orthogonal Frequency Division Multiple Access,简称:OFDMA)机制中,AP需首先向待调度的多个STA传输触发帧(Trigger帧),以分配这些STA的上行传输或下行接收的资源,即AP同时调度多个STA在不同子信道上上行或下行传输。AP发送Trigger帧,其中包含后续多个STA的上下行资源调度信息;被调度的STA根据Trigger帧中的内容在相应时间和频段上进行发送或接收。当然,Trigger帧也可只调度上行(UL-only),或只调度下行(DL-only),或同时调度上下行。在上行多用户多入多出(英文:Multiple Input Multiple Output,简称:MIMO)机制中,多个用户同时同频传输,但每个用户使用不同流。这用传输技术同样需要AP事先调度资源,即也需要Trigger帧。
无论在OFDMA还是MIMO中,Trigger帧的接收对象都是多个待调度的用户。如果其中部分用户未能正确接收Trigger帧,则后续针对该用户的所有调度都是无效的,相应的资源也就浪费了,因此,提高Trigger帧的可靠性显得特别重要。
那么,Trigger帧传输不可靠的问题是否经常出现呢?当前802.11标准中,AP会向其关联用户公告一个特定的20MHz基本信道(primary channel),每个用户通常只侦听该基本信道。只有当在基本信道上听到后续使用更宽带宽的通知时,后续才会扩展到更宽带宽上去。但无论使用何种带宽,基本信道都必须包含在其中。基于此原理,Trigger帧的发送频带也必须包括基本信道。而在802.11ax设备密集分布场景中,由于待调度的用户位于不同位置,每个用户的
干扰环境大不相同:在基本信道上,有的用户测量到干扰很小,而有的用户很大。对于后者,很难正确接收Trigger帧。因此,由于设备密集分布以及基本信道的存在,Trigger帧传输不可靠的概率较大。
以上仅以Trigger帧为例说明AP和STA之间传输不可靠的问题,事实上传输不可靠的问题存在于任一种帧的传输中,因此,需要提高接入点和站点之间的帧传输的可靠性,只是在类似Trigger帧这样的多播场景中,帧的传输可靠性问题显得尤为突出。
一般情况下,提高帧传输可靠性的方法是使用更低的调制编码方式(英文:Modulation and Coding Scheme,简称:MCS),即更低的调制速率和信道编码码率。例如,802.11ac中最低MCS为MCS0,即码率为1/2、调制方式为二进制相移键控(英文:Binary Phase Shift Keying,简称:BPSK);而在802.11ah中,提出了一种更低阶的MCS,即将MCS0的调制编码的结果再重复一遍,从而增强可靠性。然而,这种更低阶MCS的本质是引入更多冗余以换取可靠性的提高,但却会导致需传输的数据增多,传输时间更长,降低了传输效率。
802.11n中提出了一种non-HT duplicate传输方式,如图1所示。首先构建一个20MHz的传输帧,然后在多个20MHz信道进行复制,然后发送出去。non-HT duplicate的目的是为了预约较宽信道。例如,当一个802.11ac设备打算使用80MHz向另一个802.11ac设备进行传输时,将在80MHz信道上以non-HT duplicate方式发送4个请求发送(英文:Request to Send,简称:RTS)帧。其它任何第三方设备(本小区或邻小区的)在自己的基本信道(不同小区的基本信道可能不同)听到该RTS时,即可知道对方在后面的时间要使用该信道,于是就不会主动去竞争信道了,以免对对方的传输造成干扰。需要特别说明的是,non-HT duplicate并不具备提高传输可靠性的能力,因为对于一个接收用户来说,当它在某个20MHz信道上收到一个传输帧时,是无法知道该帧是否也在其它信道上复制了,以及在哪些信道上复制了。因此,即使发送端真的在多个20MHz上复制了该帧,接收端也无法利用这些副本进行合并以提高可靠性。
由上可知,现有技术无法使接收端可靠的接收到发送端发送的传输帧,需要提高发送端和接收端之间的帧传输的可靠性。
发明内容
本发明实施例提供了传输帧的发送、接收方法及装置、设备,以提高发送端和接收端之间的帧传输的可靠性。
第一方面,提供了一种传输帧的发送方法,包括:
生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;
根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽;
在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
在第一种可能的实现方式中,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
结合第一方面或第一方面的第一种可能的实现方式,在第二种可能的实现方式中,所述特定带宽为预设带宽。
结合第一方面或第一方面的第一种可能的实现方式,在第三种可能的实现方式中,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式,在第四种可能的实现方式中,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式或第一方面的第四种可能的实现方式,在第五种可能的实现方式中,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式或第一方面的第四种可
能的实现方式或第一方面的第五种可能的实现方式,在第六种可能的实现方式中,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
结合第一方面,在第七种可能的实现方式中,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
第二方面,提供了一种传输帧的接收方法,包括:
在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息;
根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;
将接收到的所述至少一个副本进行解码。
在第一种可能的实现方式中,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
结合第二方面或第二方面的第一种可能的实现方式,在第二种可能的实现方式中,所述特定带宽为预设带宽。
结合第二方面或第二方面的第一种可能的实现方式,在第三种可能的实现方式中,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种可能的实现方式或第二方面的第三种可能的实现方式,在第四种可能的实现方式中,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种可能的实现方式或第二方面的第三种可能的实现方式或第二方面的第四种可能的实现方式,在第五种可能的实现方式中,所述带宽信息为用于传输所述传
输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,包括:
在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
结合第二方面,在第六种可能的实现方式中,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种可能的实现方式或第二方面的第三种可能的实现方式或第二方面的第四种可能的实现方式或第二方面的第五种可能的实现方式或第二方面的第六种可能的实现方式,在第七种可能的实现方式中,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种可能的实现方式或第二方面的第三种可能的实现方式或第二方面的第四种可能的实现方式或第二方面的第五种可能的实现方式或第二方面的第六种可能的实现方式或第二方面的第七种可能的实现方式,在第八种可能的实现方式中,所述将接收到的所述至少一个副本进行解码,包括:
将接收到的所述至少一个副本进行合并;
对所述合并后的传输帧进行解码。
第三方面,提供了一种传输帧的发送装置,包括:
生成单元,用于生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;
复制单元,用于根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽;
发送单元,用于在所述带宽信息所指示的传输信道上发送所述复制后的传
输帧。
在第一种可能的实现方式中,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
结合第三方面或第三方面的第一种可能的实现方式,在第二种可能的实现方式中,所述特定带宽为预设带宽。
结合第三方面或第三方面的第一种可能的实现方式,在第三种可能的实现方式中,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
结合第三方面或第三方面的第一种可能的实现方式或第三方面的第二种可能的实现方式或第三方面的第三种可能的实现方式,在第四种可能的实现方式中,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
结合第三方面或第三方面的第一种可能的实现方式或第三方面的第二种可能的实现方式或第三方面的第三种可能的实现方式,在第四种可能的实现方式中,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道。
结合第三方面或第三方面的第一种可能的实现方式或第三方面的第二种可能的实现方式或第三方面的第三种可能的实现方式或第三方面的第四种可能的实现方式或第三方面的第五种可能的实现方式,在第六种可能的实现方式中,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
结合第三方面,在第七种可能的实现方式中,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
第四方面,提供了一种传输帧的接收装置,包括:
检测单元,用于在传输帧的第一信令字段中检测所述传输帧的复制指示信
息和带宽信息;
接收单元,用于根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;
第一解码单元,用于将接收到的所述至少一个副本进行解码。
在第一种可能的实现方式中,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
结合第四方面或第四方面的第一种可能的实现方式,在第二种可能的实现方式中,所述特定带宽为预设带宽。
结合第四方面或第四方面的第一种可能的实现方式,在第三种可能的实现方式中,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式,在第四种可能的实现方式中,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式或第四方面的第四种可能的实现方式,在第五种可能的实现方式中,所述带宽信息为用于传输所述传输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述接收装置具体用于:
在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
结合第四方面,在第六种可能的实现方式中,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式或第四方面的第四种可能的实现方式或第四方面的第五种可能的实现方式或第四方面的第六种可能的实现方式,在第七种可能的实现方式中,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式或第四方面的第四种可能的实现方式或第四方面的第五种可能的实现方式或第四方面的第六种可能的实现方式或第四方面的第七种可能的实现方式,在第八种可能的实现方式中,所述第一解码单元包括:
合并单元,用于将接收到的所述至少一个副本进行合并;
第二解码单元,用于对所述合并后的传输帧进行解码。
第五方面,提供了一种传输帧的发送设备,包括:处理器和发送器;
所述处理器用于生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;
所述处理器还用于根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽;
所述发送器用于在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
在第一种可能的实现方式中,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
结合第五方面或第五方面的第一种可能的实现方式,在第二种可能的实现方式中,所述特定带宽为预设带宽。
结合第五方面或第五方面的第一种可能的实现方式,在第三种可能的实现方式中,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一
个字段进行频域复制时的频域带宽单位。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式,在第四种可能的实现方式中,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式或第五方面的第四种可能的实现方式,在第五种可能的实现方式中,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式或第五方面的第四种可能的实现方式或第五方面的第五种可能的实现方式,在第六种可能的实现方式中,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
结合第五方面,在第七种可能的实现方式中,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
第六方面,提供了一种传输帧的接收设备,包括:处理器和接收器;
所述处理器用于在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息;
所述接收器用于根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;
所述处理器还用于将接收到的所述至少一个副本进行解码。
在第一种可能的实现方式中,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一
个字段进行频域复制。
结合第六方面或第六方面的第一种可能的实现方式,在第二种可能的实现方式中,所述特定带宽为预设带宽。
结合第六方面或第六方面的第一种可能的实现方式,在第三种可能的实现方式中,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
结合第六方面或第六方面的第一种可能的实现方式或第六方面的第二种可能的实现方式或第六方面的第三种可能的实现方式,在第四种可能的实现方式中,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
结合第六方面或第六方面的第一种可能的实现方式或第六方面的第二种可能的实现方式或第六方面的第三种可能的实现方式或第六方面的第四种可能的实现方式,在第五种可能的实现方式中,所述带宽信息为用于传输所述传输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述接收器具体用于:
在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
结合第六方面,在第六种可能的实现方式中,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
结合第六方面或第六方面的第一种可能的实现方式或第六方面的第二种可能的实现方式或第六方面的第三种可能的实现方式或第六方面的第四种可能的实现方式或第六方面的第五种可能的实现方式或第六方面的第六种可能的实现方式,在第七种可能的实现方式中,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
结合第六方面或第六方面的第一种可能的实现方式或第六方面的第二种可能的实现方式或第六方面的第三种可能的实现方式或第六方面的第四种可能的实现方式或第六方面的第五种可能的实现方式或第六方面的第六种可能
的实现方式或第六方面的第七种可能的实现方式,在第八种可能的实现方式中,所述处理器执行所述将接收到的所述至少一个副本进行解码的步骤,包括:
将接收到的所述至少一个副本进行合并;
对所述合并后的传输帧进行解码。
可见,采用本发明实施例提供的传输帧的发送、接收方法及装置、设备,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性。
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为现有技术中的一种传输帧的传输方式示意图;
图2为本发明实施例提供的一种传输帧的发送方法的流程示意图;
图3为一种传输帧的复制示意图;
图4为另一个传输帧的复制示意图;
图5为现有技术中一种MCS32的调制编码示意图;
图6为又一个传输帧的复制示意图;
图7为又一个传输帧的复制示意图;
图8为又一个传输帧的复制示意图;
图9为又一个传输帧的复制示意图;
图10为本发明实施例提供的一种传输帧的接收方法的流程示意图;
图11为本发明实施例提供的一种传输帧的发送装置的结构示意图;
图12为本发明实施例提供的一种传输帧的接收装置的结构示意图;
图13为本发明实施例提供的一种传输帧的发送设备的结构示意图;
图14为本发明实施例提供的一种传输帧的接收设备的结构示意图。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
请参阅图2,为本发明实施例提供的一种传输帧的发送方法的流程示意图,该方法包括以下步骤:
步骤S101,生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息。
在本发明实施例中,发送端可以是AP,则接收端是一个或多个STA,发送端也可以是STA,则接收端是AP,发送端和接收端会协商一个基本信道,例如,当前802.11标准中,AP会向其关联用户公告一个特定的20MHz基本信道,接收端一般会侦听该基本信道。
发送端生成一个待传输的传输帧,该传输帧包括第一信令字段,当然其后还包括数据字段等。发送端在第一信令字段中写入复制指示信息和带宽信息,该复制指示信息可以包括复制指示,用于指示是否对该传输帧的第一信令字段之后的一个或多个字段进行频域复制;该带宽信息指示复制后的传输帧所应充满的传输信道频率带宽。
通常情况下,当传输信道的总带宽大于20MHz且为20MHz的整数倍时,第一信令字段及其之前的所有字段是以20MHz为单位在频域进行复制传输的,而第一信令字段之后的其它字段,则按照第一信令字段所指示的方式进行传输。
步骤S102,根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽。
根据该复制指示信息,将待复制的字段以特定带宽为单位进行频域复制,然后,复制后的传输帧充满带宽信息所指示的传输信道频率带宽。例如,该特定带宽为20MHz,传输信道频率带宽为80MHz,则应该对该传输帧的第一信
令字段后的一个或多个字段进行四次复制,使得复制后的传输帧充满80MHz的传输信道频率带宽。
步骤S103,在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
生成传输帧、复制传输帧中的第一信令字段后的部分或全部字段的准备工作完成后,发送端在该带宽信息所指示的传输信道上发送该复制后的传输帧,这样,接收端进行接收时,如果检测到在第一信令字段中有该复制指示信息和带宽信息,则接收端可以确定,在带宽信息所指示的传输信道频率带宽上接收到的传输帧的第一信令字段之后的至少一个字段的多个副本,是以特定带宽为单位在频域复制传输的,因此可以对多个副本进行解码,具体地,采用合并技术将这些副本进行合并,然后,对合并的传输帧进行解码,从而能准确而可靠地接收到复制的至少一个字段的数据内容,从而提高了发送端和接收端之间的传输帧中数据传输的可靠性。合并技术可以是任何一种合并技术,如选择合并、最大比合并,取决于接收端的选择和实现。
具体的实现中,如图3所示的一种传输帧的复制示意图,传输帧采用如图3所示的物理层汇聚过程协议数据单元(physical layer convergence procedure protocol data unit,PPDU)的结构。该PPDU包含旧有导频(L-preamble)、第一信令字段(HE-SIG-A)、短训练字段(HE-STF)、长训练字段(HE-LTF)和数据字段(Data),还可以包括第二信令字段(HE-SIG-B)。在该具体实现中,第一信令字段中包括带宽(英文:Bandwidth,简称:BW)和复制指示(duplicate indication),例如,可以设置BW为N×20MHz,其中,特定带宽为20MHz,在这里,该特定带宽是预设带宽,即发送端和接收端已经预先协商好的带宽,或协议预先规定的带宽,发送端可以不需要重新通知接收端。需要说明的是,这里N并不表示传输信道的个数,可以理解为充满N×20MHz的传输信道频率带宽需要进行N次复制。复制指示可以设置为0或1或者其它双方可以识别的标识,例如,设置为1表示对传输帧中的第一信令字段后的一个或多个字段进行复制,设置为0则表示未进行复制。该复制指示消息可以指示对第一信令字段后的所有字段例如HE-STF、HE-LTF、HE-SIG-B和Data字段进行复制,也可以选择其中一个或多个字段进行复制。具体复制哪些字段,通常是协议事先规定的,或发送端和接收端事先协商的。当然,也可以在第一信令字段中显式进行
标识,即第一信令字段中包含进行频域复制的一个或多个字段的标识信息。然后,将上述20MHzPPDU的第一信令字段后的一个或多个字段在N×20MHz的传输信道频率带宽上进行复制,并在N×20MHz的传输信道频率带宽上发送复制后的传输帧。例如,在图3中,是对Data字段进行复制,BW=80MHz,则需要对Data字段复制四次。在图3中,复制指示和BW位于第一信令字段HE-SIG-A中,待复制传输的字段位于数据字段,该数据字段中的数据内容例如可以是资源分配信息。例如,该传输帧为Trigger帧,数据字段中包含调度信息。值得说明的是,高频的三个20MHz相比于最低20MHz的传输,其星座映射时可能存在相位旋转,目的是为了降低峰均功率比(英文:Peak to Average Power Ratio,简称:PAPR)。这是当前标准中带宽大于20MHz传输时的通用技术,后面不再特别强调。
当然,如果上述PPDU结构中去掉HE-SIG-B,此时,带宽和复制指示位于唯一的HE-SIG字段中。
需要特别说明的是,由于可能使用不连续频带,带宽的指示不一定是一个值,而可能是一个组成当前传输信道的频率传输子信道的位图(Bitmap),如图4所示的另一个传输帧的复制示意图,其中,第三个20MHz未使用,此时,接收端进行接收或合并操作时应排除未使用的子带。
请参阅图5,为现有技术中一种MCS32的调制编码示意图,802.11n中提出了一种称为MCS32的调制编码方式,当一个用户在基本信道上检测到HT-SIG中的MCS=32时,则意味着后续数据字段将以40MHz进行传输,并且两个20MHz上的数据是重复的,所使用的调制编码方式为MCS0。此时,用户可将两个20MHz的数据进行合并(如最大比合并),然后解码,从而提高数据部分传输的可靠性。这种方法,数据部分只能以固定带宽为单位进行重复(MCS32为20MHz),并且只能采用固定的MCS(因为HT-SIG中的MCS字段已经设置为32了,不能用来指示Data部分的其它调制编码方式)。而事实上,由于合并技术的使用提高了信号与干扰加噪声比(英文:Signal to Interference plus Noise Ratio,简称:SINR),Data部分有可能使用更高MCS。
本发明实施例对其进行了改进,请参阅图6和图7所示的又一个传输帧的复制示意图,如图6所示,当信道条件较好时,以40MHz为单位在80MHz带宽中复制两次是一种更好的选择,可减少时域传输时长,提高传输效率;同
理,如图7所示,当信道条件较差时,以20MHz为单位进行复制可能是不够的,以10MHz为单位进行复制才能保证可靠性。因此,在这里复制指示消息中需要包括特定带宽的信息,该特定带宽用于指示将传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位(英文:Bandwidth Unit,BU)。在这里,复制传输帧时,因为发送端和接收端协商好的基本信道的带宽是不变的,例如为20MHz,然而,进行字段复制的特定频域带宽单位可以大于或小于基本带宽单位,因此,复制和发送传输帧时,L-premble和HE-SIG-A仍保持不变,以基本信道带宽20MHz为单位复制传输,仅对其后的字段进行复制发送。
如图8所示,为又一个传输帧的复制示意图,基于BU,(Duplicate Indication=1,BW=BU=80)和(Duplicate Indication=0,BW=80)所指示的实际PPDU结构是相同的,因此,非复制PPDU结构可看做复制PPDU结构的一种特例。
在前面的实施例中,资源分配信息均位于媒体接入控制层(英文:Medium Access Control,简称:MAC),即PPDU结构的Data字段中。实际上,资源分配信息还有可能位于物理头中,如图9中的HE-SIG-B。此时,BW、Duplicate Indication、BU(可选)位于HE-SIG-A中,并且其所指示的复制并非Data字段的复制,而是HE-SIG-B的复制。
作为另一种实施方式,复制指示信息还可以是包括用于指示是否对传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。例如,用两个比特位信息表示,如果00表示不复制,01表示以20MHz为单位复制,10表示以40MHz为单位复制,11表示以40MHz为单位复制。
需要说明的是,虽然上文以资源调度帧进行描述,但本发明设计的方案并不仅限于资源调度帧,而是可以用于任何传输帧,以提高其传输的可靠性。
例如,当多个STA收到AP的上行资源调度帧(Trigger),并以OFDMA或MU MIMO向AP发送数据之后,AP需向这些STA回复确认帧,即ACK或BA。由于确认帧的发送并非OFDMA或MIMO方式各自向各个STA发送,而是单帧方式广播发送(内容在MAC层,即Data字段中),需要被多个STA接收,因此其可靠性也特别重要。此时,确认帧的发送也可采用本发明的方式
发送。
本发明也不仅限于多用户传输,可以是AP与单个STA之间的传输。
根据本发明实施例提供的传输帧的发送方法,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频字段复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性字段。
请参阅图10,为本发明实施例提供的一种传输帧的接收方法的流程示意图,该方法包括以下步骤:
步骤S201,在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息。
在本发明实施例中,发送端可以是AP,则接收端是一个或多个STA,发送端也可以是STA,则接收端是AP,发送端和接收端会协商一个基本信道,例如,当前802.11标准中,AP会向其关联用户公告一个特定的20MHz基本信道,接收端一般会侦听该基本信道。
接收端首先在基本信道上检测传输帧的第一信令字段中是否包含复制指示信息和带宽信息,该传输帧包括第一信令字段,当然其后还包括数据字段等。该复制指示信息可以包括复制指示,用于指示是否对该传输帧的第一信令字段之后的一个或多个字段进行频域复制,该复制指示信息还可以包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息;该带宽信息指复制后的传输帧所应充满的传输信道频率带宽。传输帧的第一信令字段之后的至少一个字段包括:传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
通常情况下,当传输信道的总带宽大于20MHz且为20MHz的整数倍时,发送端的第一信令字段及其之前的所有字段是以20MHz为单位在频域进行复制传输的,而第一信令字段之后的其它字段,则按照第一信令字段所指示的方式进行传输。
步骤S202,根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽。
如果所述至少一个字段是协议规定的,或双方事先协商的,则在该带宽信息所指示的传输信道上,接收复制后的传输帧的第一信令字段之后的至少一个字段的一个或多个副本。
如果所述至少一个字段是通过复制指示信息中的标识信息指示的,则在该带宽信息所指示的传输信道上,接收所述标识信息所指示的复制后的传输帧的第一信令字段之后的至少一个字段的一个或多个副本。
该特定带宽可以为预设带宽,即发送端和接收端已经预先协商好的带宽,或协议预先规定的带宽,发送端可以不需要重新通知接收端。
该复制指示信息包括特定带宽,该特定带宽用于指示将传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
步骤S203,将接收到的所述至少一个副本进行解码。
接收端对接收到的传输帧中的复制字段的多个副本进行解码,具体地,采用合并技术将这些副本进行合并,然后,对合并的传输帧进行解码,从而能准确而可靠地接收到复制的字段的内容,从而提高了发送端和接收端之间的传输帧中数据传输的可靠性。合并技术可以是任何一种合并技术,如选择合并,即接收端在特定带宽上进行接收,例如该特定带宽为20MHz,只要其中任一20MHz解码正确,则该帧传输成功;也可以是最大比合并,即接收端将多个20MHz上接收到复制的字段的副本进行合并,然后进行解码,具体采用哪种合并技术取决于接收端的选择和实现。这里的特定带宽也可以是用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位,后面进行详细描述。
具体的实现中,如图3所示的一种传输帧的复制示意图,传输帧采用如图3所示的PPDU的结构。该PPDU包含L-preamble、HE-SIG-A、HE-STF、HE-LTF和Data,还可以包括HE-SIG-B。在该具体实现中,第一信令字段中包括BW和复制指示,例如,可以设置BW为N×20MHz,其中,发送端以特定带宽对HE-SIG-A后的一个或多个字段进行频域复制,特定带宽为20MHz,在这里,该特定带宽是预设带宽,即发送端和接收端已经预先协商好的带宽,或协
议预先规定的带宽,发送端可以不需要重新通知接收端,接收端根据协议约定的预设带宽接收复制的字段的副本。
需要说明的是,这里N并不表示传输信道的个数,可以理解为充满N×20MHz的传输信道频率带宽需要进行N次复制。复制指示可以设置为0或1或者其它双方可以识别的标识,例如,设置为1表示对传输帧中的第一信令字段后的一个或多个字段进行复制,设置为0则表示未进行复制。该复制指示消息可以指示对第一信令字段后的所有字段例如HE-STF、HE-LTF、HE-SIG-B和Data字段进行复制,也可以选择其中一个或多个字段进行复制。具体复制哪些字段,通常是协议事先规定的,或发送端和接收端事先协商的。当然,也可以在第一信令字段中显式进行标识,即第一信令字段中包含进行频域复制的一个或多个字段的标识信息。接收端根据协议约定或根据标识信息对接收到的复制的字段的多个副本进行解码。
在图3中,复制指示和BW位于第一信令字段HE-SIG-A中,待复制传输的字段位于数据字段,该数据字段中的数据内容例如可以是资源分配信息。例如,该传输帧为Trigger帧,数据字段中包含调度信息。当然,如果上述PPDU结构中去掉HE-SIG-B,此时,带宽和复制指示位于唯一的HE-SIG字段中。
需要特别说明的是,由于可能使用不连续频带,带宽的指示不一定是一个值,而可能是一个组成当前传输信道的频率传输子信道的位图,如图4所示的另一个传输帧的复制示意图,其中,第三个20MHz未使用,此时,接收端进行接收或合并操作时应排除未使用的子带。如果带宽信息为传输传输帧的传输子信道的位图,则该位图指示的所有传输子信道共同组成传输该传输帧的传输信道,则步骤S202具体为:在所述位图所指示的传输信道上接收复制后的传输帧的第一信令字段之后的至少一个字段的至少一个副本。
请参阅图5,为现有技术中一种MCS32的调制编码示意图,802.11n中提出了一种称为MCS32的调制编码方式,当一个用户在基本信道上检测到HT-SIG中的MCS=32时,则意味着后续数据字段将以40MHz进行传输,并且两个20MHz上的数据是重复的,所使用的调制编码方式为MCS0。此时,用户可将两个20MHz的数据进行合并(如最大比合并),然后解码,从而提高数据部分传输的可靠性。这种方法,数据部分只能以固定带宽为单位进行重复(MCS32为20MHz),并且只能采用固定的MCS(因为HT-SIG中的MCS字
段已经设置为32了,不能用来指示Data部分的其它调制编码方式)。而事实上,由于合并技术的使用提高了信号与干扰加噪声比(英文:Signal to Interference plus Noise Ratio,简称:SINR),Data部分有可能使用更高MCS。
本发明实施例对其进行了改进,请参阅图6和图7所示的又一个传输帧的复制示意图,如图6所示,当信道条件较好时,发送端以40MHz为单位在80MHz带宽中复制两次是一种更好的选择,可减少时域传输时长,提高传输效率;同理,如图7所示,当信道条件较差时,发送端以20MHz为单位进行复制可能是不够的,以10MHz为单位进行复制才能保证可靠性。因此,在这里复制指示消息中需要包括特定带宽的信息,该特定带宽用于指示将传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位(英文:Bandwidth Unit,BU)。接收端根据BU,对接收到的复制的字段的副本进行解码。在这里,复制传输帧时,因为发送端和接收端协商好的基本信道的带宽是不变的,例如为20MHz,然而,进行字段复制的特定频域带宽单位可以大于或小于基本带宽单位,因此,复制和发送传输帧时,L-premble和HE-SIG-A仍保持不变,以基本信道带宽20MHz为单位复制传输,仅对其后的字段进行复制发送。
在前面的实施例中,资源分配信息均位于媒体接入控制层(英文:Medium Access Control,简称:MAC),即PPDU结构的Data字段中。实际上,资源分配信息还有可能位于物理头中,如图9中的HE-SIG-B。此时,BW、Duplicate Indication、BU(可选)位于HE-SIG-A中,并且其所指示的复制并非Data字段的复制,而是HE-SIG-B的复制。
作为另一种实施方式,复制指示信息还可以是包括用于指示是否对传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。例如,用两个比特位信息表示,如果00表示不复制,01表示以20MHz为单位复制,10表示以40MHz为单位复制,11表示以40MHz为单位复制。接收端根据该复制指示信息,对接收到的复制的字段的副本进行解码。
需要说明的是,虽然上文以资源调度帧进行描述,但本发明设计的方案并不仅限于资源调度帧,而是可以用于任何传输帧,以提高其传输的可靠性。
根据本发明实施例提供的传输帧的接收方法,发送端通过在待发送的传输
帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性。
请参阅图11,为本发明实施例提供的一种传输帧的发送装置的结构示意图,该装置1000包括:
生成单元11,用于生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息。
在本发明实施例中,发送端可以是AP,则接收端是一个或多个STA,发送端也可以是STA,则接收端是AP,发送端和接收端会协商一个基本信道,例如,当前802.11标准中,AP会向其关联用户公告一个特定的20MHz基本信道,接收端一般会侦听该基本信道。
生成单元11生成一个待传输的传输帧,该传输帧包括第一信令字段,当然其后还包括数据字段等。发送端在第一信令字段中写入复制指示信息和带宽信息,该复制指示信息可以包括复制指示,用于指示是否对该传输帧的第一信令字段之后的一个或多个字段进行频域复制;该带宽信息指示复制后的传输帧所应充满的传输信道频率带宽。
通常情况下,当传输信道的总带宽大于20MHz且为20MHz的整数倍时,第一信令字段及其之前的所有字段是以20MHz为单位在频域进行复制传输的,而第一信令字段之后的其它字段,则按照第一信令字段所指示的方式进行传输。
复制单元12,用于根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽。
复制单元12根据该复制指示信息,将待复制的字段以特定带宽为单位进行频域复制,然后,复制后的传输帧充满带宽信息所指示的传输信道频率带宽。例如,该特定带宽为20MHz,传输信道频率带宽为80MHz,则应该对该传输
帧的第一信令字段后的一个或多个字段进行四次复制,使得复制后的传输帧充满80MHz的传输信道频率带宽。
发送单元13,用于在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
生成单元11生成传输帧、复制单元12复制传输帧中的第一信令字段后的部分或全部字段的准备工作完成后,发送单元13在该带宽信息所指示的传输信道上发送该复制后的传输帧,这样,接收端进行接收时,如果检测到在第一信令字段中有该复制指示信息和带宽信息,则接收端可以确定,在带宽信息所指示的传输信道频率带宽上接收到的传输帧的第一信令字段之后的至少一个字段的多个副本,是以特定带宽为单位在频域复制传输的,因此可以对多个副本进行解码,具体地,采用合并技术将这些副本进行合并,然后,对合并的传输帧进行解码,从而能准确而可靠地接收到复制的至少一个字段的数据内容,从而提高了发送端和接收端之间的传输帧中数据传输的可靠性。合并技术可以是任何一种合并技术,如选择合并、最大比合并,取决于接收端的选择和实现。
具体的实现中,如图3所示的一种传输帧的复制示意图,传输帧采用如图3所示的物理层汇聚过程协议数据单元(physical layer convergence procedure protocol data unit,PPDU)的结构。该PPDU包含旧有导频(L-preamble)、第一信令字段(HE-SIG-A)、短训练字段(HE-STF)、长训练字段(HE-LTF)和数据字段(Data),还可以包括第二信令字段(HE-SIG-B)。在该具体实现中,第一信令字段中包括带宽(英文:Bandwidth,简称:BW)和复制指示(duplicate indication),例如,可以设置BW为N×20MHz,其中,特定带宽为20MHz,在这里,该特定带宽是预设带宽,即发送端和接收端已经预先协商好的带宽,或协议预先规定的带宽,发送端可以不需要重新通知接收端。需要说明的是,这里N并不表示传输信道的个数,可以理解为充满N×20MHz的传输信道频率带宽需要进行N次复制。复制指示可以设置为0或1或者其它双方可以识别的标识,例如,设置为1表示对传输帧中的第一信令字段后的一个或多个字段进行复制,设置为0则表示未进行复制。该复制指示消息可以指示对第一信令字段后的所有字段例如HE-STF、HE-LTF、HE-SIG-B和Data字段进行复制,也可以选择其中一个或多个字段进行复制。具体复制哪些字段,通常是协议事先规定的,或发送端和接收端事先协商的。当然,也可以在第一信令字段中显式进行
标识,即第一信令字段中包含进行频域复制的一个或多个字段的标识信息。然后,将上述20MHzPPDU的第一信令字段后的一个或多个字段在N×20MHz的传输信道频率带宽上进行复制,并在N×20MHz的传输信道频率带宽上发送复制后的传输帧。例如,在图3中,是对Data字段进行复制,BW=80MHz,则需要对Data字段复制四次。在图3中,复制指示和BW位于第一信令字段HE-SIG-A中,待复制传输的字段位于数据字段,该数据字段中的数据内容例如可以是资源分配信息。例如,该传输帧为Trigger帧,数据字段中包含调度信息。值得说明的是,高频的三个20MHz相比于最低20MHz的传输,其星座映射时可能存在相位旋转,目的是为了降低峰均功率比(英文:Peak to Average Power Ratio,简称:PAPR)。这是当前标准中带宽大于20MHz传输时的通用技术,后面不再特别强调。
当然,如果上述PPDU结构中去掉HE-SIG-B,此时,带宽和复制指示位于唯一的HE-SIG字段中。
需要特别说明的是,由于可能使用不连续频带,带宽的指示不一定是一个值,而可能是一个组成当前传输信道的频率传输子信道的位图(Bitmap),如图4所示的另一个传输帧的复制示意图,其中,第三个20MHz未使用,此时,接收端进行接收或合并操作时应排除未使用的子带。
请参阅图5,为现有技术中一种MCS32的调制编码示意图,802.11n中提出了一种称为MCS32的调制编码方式,当一个用户在基本信道上检测到HT-SIG中的MCS=32时,则意味着后续数据字段将以40MHz进行传输,并且两个20MHz上的数据是重复的,所使用的调制编码方式为MCS0。此时,用户可将两个20MHz的数据进行合并(如最大比合并),然后解码,从而提高数据部分传输的可靠性。这种方法,数据部分只能以固定带宽为单位进行重复(MCS32为20MHz),并且只能采用固定的MCS(因为HT-SIG中的MCS字段已经设置为32了,不能用来指示Data部分的其它调制编码方式)。而事实上,由于合并技术的使用提高了信号与干扰加噪声比(英文:Signal to Interference plus Noise Ratio,简称:SINR),Data部分有可能使用更高MCS。
本发明实施例对其进行了改进,请参阅图6和图7所示的又一个传输帧的复制示意图,如图6所示,当信道条件较好时,以40MHz为单位在80MHz带宽中复制两次是一种更好的选择,可减少时域传输时长,提高传输效率;同
理,如图7所示,当信道条件较差时,以20MHz为单位进行复制可能是不够的,以10MHz为单位进行复制才能保证可靠性。因此,在这里复制指示消息中需要包括特定带宽的信息,该特定带宽用于指示将传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位(英文:Bandwidth Unit,BU)。在这里,复制传输帧时,因为发送端和接收端协商好的基本信道的带宽是不变的,例如为20MHz,然而,进行字段复制的特定频域带宽单位可以大于或小于基本带宽单位,因此,复制和发送传输帧时,L-premble和HE-SIG-A仍保持不变,以基本信道带宽20MHz为单位复制传输,仅对其后的字段进行复制发送。
如图8所示,为又一个传输帧的复制示意图,基于BU,(Duplicate Indication=1,BW=BU=80)和(Duplicate Indication=0,BW=80)所指示的实际PPDU结构是相同的,因此,非复制PPDU结构可看做复制PPDU结构的一种特例。
在前面的实施例中,资源分配信息均位于媒体接入控制层(英文:Medium Access Control,简称:MAC),即PPDU结构的Data字段中。实际上,资源分配信息还有可能位于物理头中,如图9中的HE-SIG-B。此时,BW、Duplicate Indication、BU(可选)位于HE-SIG-A中,并且其所指示的复制并非Data字段的复制,而是HE-SIG-B的复制。
作为另一种实施方式,复制指示信息还可以是包括用于指示是否对传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。例如,用两个比特位信息表示,如果00表示不复制,01表示以20MHz为单位复制,10表示以40MHz为单位复制,11表示以40MHz为单位复制。
需要说明的是,虽然上文以资源调度帧进行描述,但本发明设计的方案并不仅限于资源调度帧,而是可以用于任何传输帧,以提高其传输的可靠性。
例如,当多个STA收到AP的上行资源调度帧(Trigger),并以OFDMA或MU MIMO向AP发送数据之后,AP需向这些STA回复确认帧,即ACK或BA。由于确认帧的发送并非OFDMA或MIMO方式各自向各个STA发送,而是单帧方式广播发送(内容在MAC层,即Data字段中),需要被多个STA接收,因此其可靠性也特别重要。此时,确认帧的发送也可采用本发明的方式
发送。
本发明也不仅限于多用户传输,可以是AP与单个STA之间的传输。
根据本发明实施例提供的传输帧的发送装置,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频字段复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性字段。
请参阅图12,为本发明实施例提供的一种传输帧的接收装置的结构示意图,该装置2000包括:
检测单元21,用于在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息。
在本发明实施例中,发送端可以是AP,则接收端是一个或多个STA,发送端也可以是STA,则接收端是AP,发送端和接收端会协商一个基本信道,例如,当前802.11标准中,AP会向其关联用户公告一个特定的20MHz基本信道,接收端一般会侦听该基本信道。
检测单元21首先在基本信道上检测传输帧的第一信令字段中是否包含复制指示信息和带宽信息,该传输帧包括第一信令字段,当然其后还包括数据字段等。该复制指示信息可以包括复制指示,用于指示是否对该传输帧的第一信令字段之后的一个或多个字段进行频域复制,该复制指示信息还可以包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息;该带宽信息指复制后的传输帧所应充满的传输信道频率带宽。传输帧的第一信令字段之后的至少一个字段包括:传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
通常情况下,当传输信道的总带宽大于20MHz且为20MHz的整数倍时,发送端的第一信令字段及其之前的所有字段是以20MHz为单位在频域进行复制传输的,而第一信令字段之后的其它字段,则按照第一信令字段所指示的方式进行传输。
接收单元22,用于根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽。
如果所述至少一个字段是协议规定的,或双方事先协商的,则接收单元22在该带宽信息所指示的传输信道上,接收复制后的传输帧的第一信令字段之后的至少一个字段的一个或多个副本。
如果所述至少一个字段是通过复制指示信息中的标识信息指示的,则接收单元22在该带宽信息所指示的传输信道上,接收所述标识信息所指示的复制后的传输帧的第一信令字段之后的至少一个字段的一个或多个副本。
该特定带宽可以为预设带宽,即发送端和接收端已经预先协商好的带宽,或协议预先规定的带宽,发送端可以不需要重新通知接收端。
该复制指示信息包括特定带宽,该特定带宽用于指示将传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
第一解码单元23,用于将接收到的所述至少一个副本进行解码。
第一解码单元23对接收单元22接收到的传输帧中的复制字段的多个副本进行解码,具体地,第一解码单元23包括:合并单元和第二解码单元,合并单元,用于将接收到的所述至少一个副本进行合并;第二解码单元,用于对所述合并后的传输帧进行解码。采用合并技术将这些副本进行合并,然后,对合并的传输帧进行解码,从而能准确而可靠地接收到复制的字段的内容,从而提高了发送端和接收端之间的传输帧中数据传输的可靠性。合并技术可以是任何一种合并技术,如选择合并,即接收端在特定带宽上进行接收,例如该特定带宽为20MHz,只要其中任一20MHz解码正确,则该帧传输成功;也可以是最大比合并,即接收端将多个20MHz上接收到复制的字段的副本进行合并,然后进行解码,具体采用哪种合并技术取决于接收端的选择和实现。这里的特定带宽也可以是用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位,后面进行详细描述。
具体的实现中,如图3所示的一种传输帧的复制示意图,传输帧采用如图3所示的PPDU的结构。该PPDU包含L-preamble、HE-SIG-A、HE-STF、HE-LTF和Data,还可以包括HE-SIG-B。在该具体实现中,第一信令字段中包括BW和
复制指示,例如,可以设置BW为N×20MHz,其中,发送端以特定带宽对HE-SIG-A后的一个或多个字段进行频域复制,特定带宽为20MHz,在这里,该特定带宽是预设带宽,即发送端和接收端已经预先协商好的带宽,或协议预先规定的带宽,发送端可以不需要重新通知接收端,接收端根据协议约定的预设带宽接收复制的字段的副本。
需要说明的是,这里N并不表示传输信道的个数,可以理解为充满N×20MHz的传输信道频率带宽需要进行N次复制。复制指示可以设置为0或1或者其它双方可以识别的标识,例如,设置为1表示对传输帧中的第一信令字段后的一个或多个字段进行复制,设置为0则表示未进行复制。该复制指示消息可以指示对第一信令字段后的所有字段例如HE-STF、HE-LTF、HE-SIG-B和Data字段进行复制,也可以选择其中一个或多个字段进行复制。具体复制哪些字段,通常是协议事先规定的,或发送端和接收端事先协商的。当然,也可以在第一信令字段中显式进行标识,即第一信令字段中包含进行频域复制的一个或多个字段的标识信息。接收端根据协议约定或根据标识信息对接收到的复制的字段的多个副本进行解码。
在图3中,复制指示和BW位于第一信令字段HE-SIG-A中,待复制传输的字段位于数据字段,该数据字段中的数据内容例如可以是资源分配信息。例如,该传输帧为Trigger帧,数据字段中包含调度信息。当然,如果上述PPDU结构中去掉HE-SIG-B,此时,带宽和复制指示位于唯一的HE-SIG字段中。
需要特别说明的是,由于可能使用不连续频带,带宽的指示不一定是一个值,而可能是一个组成当前传输信道的频率传输子信道的位图,如图4所示的另一个传输帧的复制示意图,其中,第三个20MHz未使用,此时,接收端进行接收或合并操作时应排除未使用的子带。如果带宽信息为传输传输帧的传输子信道的位图,则该位图指示的所有传输子信道共同组成传输该传输帧的传输信道,则接收单元22具体用于:在所述位图所指示的传输信道上接收复制后的传输帧的第一信令字段之后的至少一个字段的至少一个副本。
请参阅图5,为现有技术中一种MCS32的调制编码示意图,802.11n中提出了一种称为MCS32的调制编码方式,当一个用户在基本信道上检测到HT-SIG中的MCS=32时,则意味着后续数据字段将以40MHz进行传输,并且两个20MHz上的数据是重复的,所使用的调制编码方式为MCS0。此时,用户可将
两个20MHz的数据进行合并(如最大比合并),然后解码,从而提高数据部分传输的可靠性。这种方法,数据部分只能以固定带宽为单位进行重复(MCS32为20MHz),并且只能采用固定的MCS(因为HT-SIG中的MCS字段已经设置为32了,不能用来指示Data部分的其它调制编码方式)。而事实上,由于合并技术的使用提高了信号与干扰加噪声比(英文:Signal to Interference plus Noise Ratio,简称:SINR),Data部分有可能使用更高MCS。
本发明实施例对其进行了改进,请参阅图6和图7所示的又一个传输帧的复制示意图,如图6所示,当信道条件较好时,发送端以40MHz为单位在80MHz带宽中复制两次是一种更好的选择,可减少时域传输时长,提高传输效率;同理,如图7所示,当信道条件较差时,发送端以20MHz为单位进行复制可能是不够的,以10MHz为单位进行复制才能保证可靠性。因此,在这里复制指示消息中需要包括特定带宽的信息,该特定带宽用于指示将传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位(英文:Bandwidth Unit,BU)。接收端根据BU,对接收到的复制的字段的副本进行解码。在这里,复制传输帧时,因为发送端和接收端协商好的基本信道的带宽是不变的,例如为20MHz,然而,进行字段复制的特定频域带宽单位可以大于或小于基本带宽单位,因此,复制和发送传输帧时,L-premble和HE-SIG-A仍保持不变,以基本信道带宽20MHz为单位复制传输,仅对其后的字段进行复制发送。
在前面的实施例中,资源分配信息均位于媒体接入控制层(英文:Medium Access Control,简称:MAC),即PPDU结构的Data字段中。实际上,资源分配信息还有可能位于物理头中,如图9中的HE-SIG-B。此时,BW、Duplicate Indication、BU(可选)位于HE-SIG-A中,并且其所指示的复制并非Data字段的复制,而是HE-SIG-B的复制。
作为另一种实施方式,复制指示信息还可以是包括用于指示是否对传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。例如,用两个比特位信息表示,如果00表示不复制,01表示以20MHz为单位复制,10表示以40MHz为单位复制,11表示以40MHz为单位复制。接收端根据该复制指示信息,对接收到的复制的字段的副本进行解码。
需要说明的是,虽然上文以资源调度帧进行描述,但本发明设计的方案并
不仅限于资源调度帧,而是可以用于任何传输帧,以提高其传输的可靠性。
根据本发明实施例提供的传输帧的接收装置,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性。
请参阅图13,为本发明实施例提供的一种传输帧的发送设备的结构示意图,该发送设备3000包括:处理器31和发送器32;
所述处理器用于生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;
所述处理器还用于根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽;
所述发送器用于在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
作为一种实施方式,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
作为另一种实施方式,所述特定带宽为预设带宽。
作为又一种实施方式,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
作为又一种实施方式,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
作为又一种实施方式,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道。
作为又一种实施方式,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
作为又一种实施方式,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
根据本发明实施例提供的传输帧的发送设备,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频字段复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性字段。
请参阅图14,为本发明实施例提供的一种传输帧的接收设备的结构示意图,该接收设备4000包括:处理器41和接收器42;
所述处理器用于在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息;
所述接收器用于根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;
所述处理器还用于将接收到的所述至少一个副本进行解码。
作为一种实施方式,所述复制指示信息包括复制指示;
所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
作为另一种实施方式,所述特定带宽为预设带宽。
作为又一种实施方式,所述复制指示信息包括所述特定带宽;
其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
作为又一种实施方式,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
作为又一种实施方式,所述带宽信息为用于传输所述传输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述接收器具体用于:
在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
作为又一种实施方式,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
作为又一种实施方式,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
作为又一种实施方式,所述处理器执行所述将接收到的所述至少一个副本进行解码的步骤,包括:
将接收到的所述至少一个副本进行合并;
对所述合并后的传输帧进行解码。
根据本发明实施例提供的传输帧的接收设备,发送端通过在待发送的传输帧的第一信令字段中携带复制指示消息和带宽信息,根据复制指示信息,将传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满带宽信息所指示的传输信道频率带宽,然后在带宽信息所指示的传输信道上发送复制后的传输帧,使接收端能可靠的接收到传输帧中复制的字段中的数据,提高了发送端和接收端之间的传输帧中数据的传输的可靠性。
需要说明的是,对于前述的各方法实施例,为了简单描述,故将其都表述为一系列的动作组合,但是本领域技术人员应该知悉,本发明并不受所描述的动作顺序的限制,因为根据本发明,某些步骤可以采用其他顺序或者同时进行。其次,本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施例,所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中,对各个实施例的描述都各有侧重,某个实施例中没有详
述的部分,可以参见其他实施例的相关描述。
本发明实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本发明实施例装置中的单元可以根据实际需要进行合并、划分和删减。本领域的技术人员可以将本说明书中描述的不同实施例以及不同实施例的特征进行结合或组合。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本发明可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)、电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory,EEPROM)、只读光盘(Compact Disc Read-Only Memory,CD-ROM)或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(Digital Subscriber Line,DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本发明所使用的,盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟,其中盘通常磁性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之,以上所述仅为本发明技术方案的较佳实施例而已,并非用于限定本发明的保护范围。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (51)
- 一种传输帧的发送方法,其特征在于,包括:生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽;在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
- 如权利要求1所述的方法,其特征在于,所述复制指示信息包括复制指示;所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
- 如权利要求1或2所述的方法,其特征在于,所述特定带宽为预设带宽。
- 如权利要求1或2所述的方法,其特征在于,所述复制指示信息包括所述特定带宽;其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
- 如权利要求1-4任意一项所述的方法,其特征在于,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
- 如权利要求1-5任意一项所述的方法,其特征在于,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道 共同组成传输所述传输帧的传输信道。
- 如权利要求1-6任意一项所述的方法,其特征在于,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
- 如权利要求1所述的方法,其特征在于,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
- 一种传输帧的接收方法,其特征在于,包括:在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息;根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;将接收到的所述至少一个副本进行解码。
- 如权利要求9所述的方法,其特征在于,所述复制指示信息包括复制指示;所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
- 如权利要求9或10所述的方法,其特征在于,所述特定带宽为预设带宽。
- 如权利要求9或10所述的方法,其特征在于,所述复制指示信息包括所述特定带宽;其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
- 如权利要求9-12任意一项所述的方法,其特征在于,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
- 如权利要求9-13任意一项所述的方法,其特征在于,所述带宽信息为用于传输所述传输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,包括:在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
- 如权利要求9所述的方法,其特征在于,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
- 如权利要求9-15任意一项所述的方法,其特征在于,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
- 如权利要求9-16任意一项所述的方法,其特征在于,所述将接收到的所述至少一个副本进行解码,包括:将接收到的所述至少一个副本进行合并;对所述合并后的传输帧进行解码。
- 一种传输帧的发送装置,其特征在于,包括:生成单元,用于生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;复制单元,用于根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满 所述带宽信息所指示的传输信道频率带宽;发送单元,用于在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
- 如权利要求18所述的发送装置,其特征在于,所述复制指示信息包括复制指示;所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
- 如权利要求18或19所述的发送装置,其特征在于,所述特定带宽为预设带宽。
- 如权利要求18或19所述的发送装置,其特征在于,所述复制指示信息包括所述特定带宽;其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
- 如权利要求18-21任意一项所述的发送装置,其特征在于,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
- 如权利要求18-22任意一项所述的发送装置,其特征在于,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道。
- 如权利要求18-23任意一项所述的发送装置,其特征在于,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
- 如权利要求18所述的发送装置,其特征在于,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
- 一种传输帧的接收装置,其特征在于,包括:检测单元,用于在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息;接收单元,用于根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;第一解码单元,用于将接收到的所述至少一个副本进行解码。
- 如权利要求26所述的接收装置,其特征在于,所述复制指示信息包括复制指示;所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
- 如权利要求26或27所述的接收装置,其特征在于,所述特定带宽为预设带宽。
- 如权利要求26或27所述的接收装置,其特征在于,所述复制指示信息包括所述特定带宽;其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
- 如权利要求26-29任意一项所述的接收装置,其特征在于,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
- 如权利要求26-30任意一项所述的接收装置,其特征在于,所述带宽信息为用于传输所述传输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述接收装置具体用于:在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
- 如权利要求26所述的接收装置,其特征在于,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
- 如权利要求26-32任意一项所述的接收装置,其特征在于,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
- 如权利要求26-33任意一项所述的接收装置,其特征在于,所述第一解码单元包括:合并单元,用于将接收到的所述至少一个副本进行合并;第二解码单元,用于对所述合并后的传输帧进行解码。
- 一种传输帧的发送设备,其特征在于,包括:处理器和发送器;所述处理器用于生成一个传输帧,所述传输帧的第一信令字段中包含所述传输帧的复制指示信息和带宽信息;所述处理器还用于根据所述复制指示信息,将所述传输帧的第一信令字段之后的至少一个字段以特定带宽为单位进行频域复制,使得复制后的传输帧充满所述带宽信息所指示的传输信道频率带宽;所述发送器用于在所述带宽信息所指示的传输信道上发送所述复制后的传输帧。
- 如权利要求35所述的发送设备,其特征在于,所述复制指示信息包 括复制指示;所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
- 如权利要求35或36所述的发送设备,其特征在于,所述特定带宽为预设带宽。
- 如权利要求35或36所述的发送设备,其特征在于,所述复制指示信息包括所述特定带宽;其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
- 如权利要求35-38任意一项所述的发送设备,其特征在于,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
- 如权利要求35-39任意一项所述的发送设备,其特征在于,所述带宽信息为用于传输所述传输帧的的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道。
- 如权利要求35-40任意一项所述的发送设备,其特征在于,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
- 如权利要求35所述的发送设备,其特征在于,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
- 一种传输帧的接收设备,其特征在于,包括:处理器和接收器;所述处理器用于在传输帧的第一信令字段中检测所述传输帧的复制指示信息和带宽信息;所述接收器用于根据所述复制指示信息,在所述带宽信息所指示的传输信道上接收复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本,所述至少一个副本中的每个副本对应所述传输信道中的一个特定带宽;所述处理器还用于将接收到的所述至少一个副本进行解码。
- 如权利要求43所述的接收设备,其特征在于,所述复制指示信息包括复制指示;所述复制指示用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制。
- 如权利要求43或44所述的接收设备,其特征在于,所述特定带宽为预设带宽。
- 如权利要求43或44所述的接收设备,其特征在于,所述复制指示信息包括所述特定带宽;其中,所述特定带宽用于指示将所述传输帧的第一信令字段之后的至少一个字段进行频域复制时的频域带宽单位。
- 如权利要求43-46任意一项所述的接收设备,其特征在于,所述复制指示信息还包括进行复制的所述传输帧的第一信令字段之后的至少一个字段的标识信息。
- 如权利要求43-47任意一项所述的接收设备,其特征在于,所述带宽信息为用于传输所述传输帧的传输子信道的位图,所述位图指示的所有传输子信道共同组成传输所述传输帧的传输信道,所述接收器具体用于:在所述位图所指示的传输信道上接收所述复制后的所述传输帧的第一信令字段之后的至少一个字段的至少一个副本。
- 如权利要求43所述的接收设备,其特征在于,所述复制指示信息包括用于指示是否对所述传输帧的第一信令字段之后的至少一个字段进行频域复制以及复制的频域带宽单位的至少两个比特信息。
- 如权利要求43-49任意一项所述的接收设备,其特征在于,所述传输帧的第一信令字段之后的至少一个字段包括:所述传输帧的第一信令字段之后的所有字段,或,数据字段,或,第二信令字段,或,数据字段和第二信令字段。
- 如权利要求43-50任意一项所述的接收设备,其特征在于,所述处理器执行所述将接收到的所述至少一个副本进行解码的步骤,包括:将接收到的所述至少一个副本进行合并;对所述合并后的传输帧进行解码。
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