WO2016090604A1 - 一种数据流的传输方法、发送端设备、接收端设备及系统 - Google Patents

一种数据流的传输方法、发送端设备、接收端设备及系统 Download PDF

Info

Publication number
WO2016090604A1
WO2016090604A1 PCT/CN2014/093586 CN2014093586W WO2016090604A1 WO 2016090604 A1 WO2016090604 A1 WO 2016090604A1 CN 2014093586 W CN2014093586 W CN 2014093586W WO 2016090604 A1 WO2016090604 A1 WO 2016090604A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmitting
data
end device
combination
sending
Prior art date
Application number
PCT/CN2014/093586
Other languages
English (en)
French (fr)
Inventor
吴涛
陈特彦
刘乐
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/093586 priority Critical patent/WO2016090604A1/zh
Priority to CN201480083914.7A priority patent/CN107005295B/zh
Publication of WO2016090604A1 publication Critical patent/WO2016090604A1/zh

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data stream transmission method, a sender device, a receiver device, and a system.
  • WiFi Wireless Fidelity
  • WiFi Wireless Fidelity
  • MIMO Multiple-Input Multiple-Output
  • Multi-user MIMO technology means that there are multiple transmitting devices at the same time on the transmitting end, and each transmitting device is provided with one or more antennas, and the transmitting devices simultaneously send signals to the receiving device, and the receiving end receives with multiple antennas. And restore the original signal, the technology can further effectively improve the transmission efficiency in the multi-user scenario.
  • Multi-user MIMO technology In a common WiFi environment, there are generally multiple sender devices (such as smart phones, tablets, and personal computers), and multi-user MIMO technology can be applied to WiFi.
  • the multi-channel technology is applied to a wireless communication system. If the channel is divided into several sub-channels, the conventional technique is to assign a sub-channel to each transmitting device to transmit signals, and the multi-channel technology is characterized in that each transmitting device is allocated a large amount. Sub-channels, such as assigning two adjacent sub-channels to one transmitting device, increase the bandwidth of each transmitting device and increase the transmission rate.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDM Orthogonal Frequency Division Multiplexing
  • a channel is divided into a plurality of orthogonal sub-channels, and a high-speed signal is converted into a parallel low-speed sub-data stream, modulated to Transmission is performed on each subchannel, which increases the spectrum utilization of the wireless communication system.
  • the embodiment of the invention provides a data stream transmission method, a sender device, a receiver device and a system, which can improve the transmission gain of the WiFi.
  • a first aspect of the embodiments of the present invention provides a data stream sending method, where the method is applied to a wireless communication system using a multiple input multiple output technology, where the wireless communication system includes a receiving end device and is composed of multiple transmitting end devices.
  • a sender device group wherein at least one of the sender devices includes a plurality of transmit antennas, and the total number of data streams received by the receiver device is smaller than all of the sender devices in the sender device group for transmitting data streams
  • the total number of transmit antennas includes:
  • the sending, by the receiving end device, the data part of the data frame in the data stream includes:
  • the resource unit being composed of a time domain resource and a frequency domain resource
  • the acquiring, by using the at least one type of the sending antenna includes:
  • Receiving a combination manner of the transmitting antennas fed back by the receiving end device, where the feedback transmitting antennas are combined by the receiving end device after performing channel estimation according to the pilot signals, from all the channels for transmitting data streams The combination of one or more of the transmit antennas whose quality of the corresponding channel information selected in the transmit antenna meets a preset requirement.
  • the acquiring a combination manner of at least one of the sending antennas includes:
  • the data part is sent to the receiving end device by using one of the resource units in a combination manner of the Nth type of transmitting antennas, where the N is not greater than M
  • the natural number, the serial number of the transmission cycle is cyclically ordered in the order of 1 to M.
  • the acquiring, by using the at least one type of the sending antenna includes:
  • the resource unit is composed of one or more consecutive OFDM symbols on a time domain resource
  • the resource unit is composed of one or more channels on a frequency domain resource or a group of subcarriers on a frequency domain resource.
  • a second aspect of the embodiments of the present invention provides a data stream receiving method, where the method is applied to a wireless communication system using a multiple input multiple output technology, where the wireless communication system includes a receiving end device and is composed of multiple transmitting end devices.
  • a sender device group wherein at least one of the sender devices includes a plurality of transmit antennas, and the total number of data streams received by the receiver device is smaller than all of the sender devices in the sender device group for transmitting data streams
  • the total number of transmit antennas includes:
  • the receiving, by the receiving, the data part of the data frame in the data stream that is sent by the sending end device includes:
  • Performing signal detection on the data portion of the data frame according to the channel information to obtain data information of the data portion including:
  • the channel estimation is performed according to the specified number of pilot signals carried in a header portion of the data frame.
  • the method further includes:
  • the receiving, by the at least one resource unit, receiving the sending end device in each preset sending period The data portion transmitted by a combination of the specified at least one transmit antenna includes:
  • the one resource unit Receiving, by the one resource unit, the data part that is sent by the sending end device in a combination manner of the Nth type of the transmitting antenna, where the transmitting antenna is combined in the sending period with the sequence number N
  • the M is a natural number
  • the N is a natural number not greater than M
  • the serial numbers of the sending periods are cyclically sorted in the order of 1 to M;
  • the receiving, by the at least one resource unit, receiving the sending end device in each preset sending period The data portion transmitted by a combination of the specified at least one transmit antenna includes:
  • the combination of the transmission antennas is M
  • the combination of the M transmission antennas has J types
  • the M and the J are natural numbers
  • the N is a natural number not greater than M.
  • the serial number of the sending cycle is cyclically sorted in the order of 1 to M
  • the K is a natural number not greater than J;
  • the Nth device in the Kth arrangement manner is adopted for the transmitting end device.
  • the data portion transmitted by the combination of the transmitting antennas performs signal detection to acquire data information of the data portion.
  • the resource unit is composed of one or more consecutive OFDM symbols on a time domain resource
  • the resource unit is composed of one or more channels on a frequency domain resource or a group of subcarriers on a frequency domain resource.
  • a third aspect of the embodiments of the present invention provides a transmitting end device, where the sending end device is applied to A wireless communication system using a multiple input multiple output technique, the wireless communication system comprising a receiving end device and a transmitting end device group comprising a plurality of the transmitting end devices, wherein at least one of the transmitting end devices comprises a plurality of transmitting antennas,
  • the total number of data streams received by the receiving device is smaller than the total number of all transmitting antennas for sending data streams of all the transmitting devices in the sending device group.
  • the transmitting device includes:
  • a frame header part sending module configured to send, to the receiving end device, a frame header part of the data frame in the data stream, where the frame header part carries a specified number of pilot signals, where the specified quantity is equal to all used in the sending end device group The total number of all transmit antennas of the transmitting device that sends the data stream;
  • a data part sending module configured to send, to the receiving end device, a data part of the data frame in the data stream.
  • the data part sending module where the sending antenna is combined, is a set of the plurality of sending antennas that belong to different sending end devices, and includes:
  • An antenna combination acquiring unit configured to acquire a combination manner of at least one of the transmitting antennas
  • a resource unit acquiring unit configured to determine at least one resource unit, where the resource unit is composed of a time domain resource and a frequency domain resource;
  • a data part sending unit configured to send the data part to the receiving end device by using the specified combination of the sending antennas by using the resource unit in each preset sending period.
  • the antenna combination acquiring unit is specifically configured to receive a combination manner of a transmitting antenna fed back by the receiving end device, where The combination of the transmit antennas of the feedback is that after the channel estimation by the receiving end device according to the pilot signal, the quality of the corresponding channel information selected from all the transmitting antennas for transmitting the data stream is consistent.
  • the antenna combination acquiring unit is configured to acquire a combination manner of the M types of the transmitting antennas, where The M is a natural number;
  • the data part sending unit is configured to send the data part to the receiving end device by using a combination manner of the Nth type of the transmitting antenna by using one of the resource units in the sending period with the sequence number N
  • N is a natural number not greater than M
  • the sequence numbers of the transmission periods are cyclically ordered in an order of 1 to M.
  • the antenna combination acquiring unit is configured to acquire a combination manner of the M types of the transmitting antennas, and obtain a type J arrangement of combinations of the types of the transmitting antennas, wherein the M and the J are natural numbers;
  • the data part sending unit is configured to: in the transmission period with the sequence number N, use the Kth resource unit, and adopt a combination manner of the Nth transmit antenna in the Kth arrangement manner, Sending the data part to the receiving end device, where the N is a natural number not greater than M, and the serial number of the sending period is cyclically sorted in an order of 1 to M, and the K is a natural number not greater than J.
  • the resource unit is composed of one or more consecutive OFDM symbols on a time domain resource
  • the resource unit is composed of one or more channels on a frequency domain resource or a group of subcarriers on a frequency domain resource.
  • a fourth aspect of the embodiments of the present invention provides a receiving end device, where the receiving end device is applied to a wireless communication system using multiple input multiple output technologies, where the wireless communication system includes the receiving end device and multiple transmitting ends.
  • a transmitting device group of the device wherein at least one of the transmitting devices includes a plurality of transmitting antennas, and the total number of data streams received by the receiving device is smaller than all of the transmitting devices in the transmitting device group for sending The total number of transmitting antennas of the data stream, and the receiving device includes:
  • a header part receiving module configured to receive a frame header part of a data frame in a data stream sent by the sending end device, where the frame header part carries a specified number of pilot signals, where the specified quantity is equal to all used in the sending end device group The total number of all transmit antennas of the transmitting device that transmit data;
  • a channel information acquiring module configured to perform channel estimation according to the specified number of pilot signals carried in a header portion of the data frame to obtain channel information corresponding to the transmitting antennas for transmitting a data stream;
  • a data part receiving module configured to receive a data part of a data frame in the data stream sent by the sending end device
  • a data information obtaining module configured to perform, according to the channel information, a data portion of the data frame Signal detection to obtain data information of the data portion;
  • the data information acquiring module is configured to perform signal detection on the data portion of the data frame to obtain data information of the data portion according to the channel information corresponding to the transmitting antenna in the combined manner of the specified transmitting antenna.
  • the data part receiving module is configured to receive, by using at least one resource unit, the sending end device by using the specified at least one type of sending in each preset sending period. The portion of the data transmitted by the combination of antennas.
  • the receiving device further includes:
  • An antenna combination selection module configured to detect, according to the pilot signal, a channel used by each of the transmitting antennas, and select a quality of the corresponding channel information from all the transmitting antennas used for transmitting the data stream to meet a preset requirement. a combination of one or more of the transmitting antennas;
  • an antenna combination feedback module configured to feed back the selected combination manner of the one or more of the sending antennas to the sending end device.
  • the data part receiving module is specifically configured to use the sending period of sequence number N by using one
  • the resource unit receives the data part that is sent by the sending end device in a combination manner of the Nth type of the transmitting antenna, where the transmitting antenna has a combination of M types, and the M is a natural number, N is a natural number not greater than M, and the serial numbers of the transmission periods are cyclically sorted in the order of 1 to M;
  • the data information acquiring module is specifically configured to send, according to the channel information corresponding to the transmitting antenna in the combination manner of the Nth transmitting antenna, the transmitting device to use the combination of the Nth transmitting antennas.
  • the data portion performs signal detection to obtain data information of the data portion.
  • the data part receiving module is specifically configured to use the sending period of the sequence number N
  • the K data units receive the data part that is sent by the sending end device by using a combination of the Nth transmit antennas in the Kth arrangement, wherein the sending antennas are combined
  • the M and the J are natural numbers, and the N is a natural number not greater than M, and the serial number of the sending period is Sequence sequential ordering of 1 to M, the K being a natural number not greater than J;
  • the data information obtaining module is specifically configured to use the channel information corresponding to the transmitting antenna in the combination mode of the Nth transmitting antenna in the Kth arrangement, and adopt the Kth type in the transmitting device
  • the data portion transmitted by the combination of the Nth transmit antennas in the arrangement manner performs signal detection to acquire data information of the data portion.
  • the resource unit is composed of one or more consecutive OFDM symbols on a time domain resource
  • the resource unit is composed of one or more channels on a frequency domain resource or a group of subcarriers on a frequency domain resource.
  • a fifth aspect of the embodiments of the present invention provides a wireless communication system, where the wireless communication system includes the sender device provided by the third aspect, and the receiver device provided by the fourth aspect.
  • a sixth aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of a method for transmitting a data stream provided by the first aspect.
  • a seventh aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the method for receiving a data stream provided by the second aspect.
  • An eighth aspect of the embodiments of the present invention provides a transmitting end device, including: an antenna interface, a memory, and a processor, wherein the memory stores a set of programs, and the processor is configured to call a program stored in the memory, to perform the following operations. :
  • a ninth aspect of the embodiments of the present invention provides a receiving end device, including: an antenna interface, a memory, and a processor, wherein the memory stores a set of programs, and the processor is configured to call a program stored in the memory, to perform the following operations. :
  • the sender device in the embodiment of the present invention first sends a frame header portion of the data frame in the data stream to the receiver device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to the sender device group.
  • the total number of all transmitting antennas for transmitting data streams of all the transmitting devices is that the data portion of the data frames in the transmitted data stream is diversityd in the embodiment of the present invention, so that the data portion includes all the transmissions in the transmitting device group.
  • the message sent by the transmitting antenna of the end device can ensure that the receiving end device can obtain the channel information corresponding to all transmitting antennas by carrying the pilot signals of all transmitting antennas in the frame header portion of the data frame; then the transmitting end device is further sent to the receiving end device.
  • the data portion of the data frame in the data stream is sent, wherein the data portion has been divided, and the transmission gain of the WiFi can be improved.
  • FIG. 1 is a schematic structural diagram of a data frame in a WiFi standard according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a scenario of a multi-user MIMO technology according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of channel division according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an OFDM data part according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for sending a data stream according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of another method for sending a data stream according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of a method for transmitting a data stream according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of another method for transmitting a data stream according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a device at a transmitting end according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a data part sending module according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a receiving end device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a wireless communication system for data flow according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another sending end device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another receiving end device according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic diagram of a scenario of data stream transmission according to an embodiment of the present invention.
  • FIG. 16 is a schematic diagram of a time diversity manner according to an embodiment of the present invention.
  • FIG. 17 is a schematic diagram of a time and frequency diversity manner according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of another time diversity manner according to an embodiment of the present invention.
  • FIG. 19 is a schematic diagram of another time and frequency diversity manner according to an embodiment of the present invention.
  • 20 is a schematic diagram of a pilot subcarrier in a time division manner according to an embodiment of the present invention.
  • FIG. 21 is a schematic diagram of a pilot subcarrier in a frequency division manner according to an embodiment of the present disclosure.
  • FIG. 22 is a schematic diagram of a pilot subcarrier based on orthogonal matrix code division according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Global Interconnected Microwave Access
  • the sender device group refers to a group of sender devices that are in a working state for implementing a transmission task
  • the sender device may be a smart phone, a tablet computer, a desktop computer, a notebook computer, or a handheld device.
  • the transmitting device should include at least one transmitting antenna for transmitting a message to the receiving device.
  • the receiving end device may be a switching device such as a wireless router, and the receiving end device should include multiple sending antennas for receiving the message sent by the sending end device.
  • the WiFi standard is 802.11a, 802.11b, 802.11d, 802.11n, and 802.11ac.
  • the 802.11a is used as an example.
  • the data frame is divided into frame headers. , data part and end of frame.
  • the frame header carries a pilot signal, which is carried in an LTF (Long Training Field), wherein the pilot signal is used for channel estimation, that is, the receiving end device can detect the channel according to the pilot signal, and the specific implementation manner is not described herein again.
  • LTF Long Training Field
  • the data part, the Data Field is used to carry data messages.
  • the end of the frame is used to fill the tail bits so that the data frame can fill an integer multiple of the OFDM symbol.
  • h 11 and h 21 are the channels of the first and second antennas of STA1 to AP
  • h 12 and h 22 are the channels of the first and second antennas of STA2 to AP
  • the AP uses the corresponding detection algorithm for signal detection. Processing, information of signals S 1 and S 2 can be obtained. For example, taking the zero-forcing detection algorithm as an example, the estimates corresponding to S 1 and S 2 can be obtained by the following formula (2):
  • [] -1 represents the matrix inversion. It can be seen that the WiFi system adopts multi-user MIMO technology, and the message transmitted twice can be transmitted at one time, thereby greatly improving the transmission efficiency and throughput. It is to be noted that the AP needs to detect the channels used by the two transmitting antennas in order to implement the demodulation of the two data streams of the STA1 and the STA2 to the AP. In the specific implementation process, the data stream carried by the STA1 is carried in the detection. The pilot signal of the channel used by the transmitting antenna of STA1 carries the pilot signal for detecting the channel used by the transmitting antenna of STA2 in the data stream transmitted by STA2.
  • the conventional technique is to allocate one subchannel to each transmitting device.
  • the multi-channel technology allocates multiple sub-channels to each transmitting device at the same time. For example, each transmitting device simultaneously allocates two adjacent sub-channels to achieve a bandwidth of 44 Mhz, which improves the transmission rate.
  • the embodiment of the present invention is directed to a scenario in which a multi-channel technology and an OFDM technology are introduced in a multi-user MIMO technology, and a method for performing time diversity and/or frequency diversity on a transmission signal is proposed.
  • FIG. 5 is a schematic flowchart of a method for sending a data stream according to an embodiment of the present invention.
  • the method for transmitting a data stream in this embodiment is applied to a wireless communication system employing a multiple input multiple output technology, where the wireless communication system includes a receiving end device and a transmitting end device group composed of a plurality of transmitting end devices, at least one of which The sender device includes multiple transmit antennas, and the total number of data streams received by the receiver device
  • the flow of the method for transmitting the data stream in the embodiment of the present invention may be:
  • the frame header part of the data frame in the data stream is sent to the receiving end device, where the frame header part carries a specified number of pilot signals, where the specified quantity is equal to all the sending end devices in the sending end device group are used for sending.
  • the total number of transmit antennas of the data stream is the frame header part of the data frame in the data stream.
  • the specified number of pilot signals are used for channel estimation to obtain channel information corresponding to all transmitting antennas for transmitting data streams of all the transmitting end devices in the transmitting device group.
  • the reason why the transmitting end device sends the pilot signals of all the transmitting antennas is that the subsequent steps of the embodiment of the present invention will divide the data portions of the data frames in the transmitted data stream, and the data portion after the diversity includes all the sending in the transmitting device group.
  • the message sent by the different transmit antenna combinations of the end device can ensure that the receiving end device can obtain the channel information corresponding to all the transmitting antennas by carrying the pilot signals of all the transmitting antennas in the frame header portion of the data frame, and the receiving device acquires and transmits the channel information.
  • the manner in which the frame header portion of the data frame carries the pilot signal is a distinguishing technical feature from the existing standard, for example, assuming that there are m transmitting antennas for transmitting data streams, and There are n (n ⁇ m) data streams transmitted to the receiving device.
  • the existing standard only the pilot signals of the n transmitting antennas are carried in the frame header portion of the data frame in the data stream, and the solution is optimal.
  • the diversity or selection effect requires that the pilot signals of the m transmit antennas be carried in the header portion of the data frame.
  • pilot signal transmitted in the embodiment of the present invention is also different from the pilot signal in the existing standard.
  • the pilot signal cannot be distributed from which transmitting antenna, and can only be distributed.
  • the pilot signal transmitted in the embodiment of the present invention has the following two characteristics:
  • each pilot signal has no interference with each other, and the receiving device can detect the channel of the transmitting antenna according to the pilot signal corresponding to each transmitting antenna.
  • the transmission method of the pilot signal includes time division, frequency division, and orthogonal matrix code division.
  • the following describes the transmission method of the next time division and frequency division.
  • the pilot signals of the time-division pilot signals occupy different symbols corresponding to the pilot signals of different transmitting antennas
  • the pilot signals of the frequency-divided pilot signals occupy different sub-carriers corresponding to the pilot signals of different transmitting antennas.
  • two transmit antennas refer to FIG. 20.
  • all subcarriers on the first symbol transmit the pilot signal of the first antenna (as shown in the white square), on the second symbol.
  • All subcarriers are transmitted second
  • the pilot signal of the transmitting antenna (as shown in the gray square); see Figure 21, in the frequency division mode, the pilot signal of the first transmitting antenna (as shown in the white square) and the second transmitting antenna
  • the frequency signals (as shown in the gray squares) occupy different subcarriers.
  • one LTF symbol in FIG. 22(A) represents one OFDM symbol
  • one OFDM symbol in FIG. 22(B) is composed of several subcarriers in the frequency domain.
  • the signal on the kth subcarrier is as shown in formula (3).
  • r 1, k is the received signal of the receiving antenna on the first symbol, the kth subcarrier, and r 2,k is the signal received by the receiving antenna on the second symbol, the kth subcarrier; h 1 , k is the channel of the first data stream on the kth subcarrier, and h 2,k is the channel of the second data stream on the kth subcarrier, and the channel is substantially unchanged for two consecutive symbol periods; p is a pilot constant. For the convenience of description, we will not skip the mention of p, and does not affect the specific content of the present invention.
  • n 1, k is the noise signal of the receiving antenna on the first symbol and the kth subcarrier.
  • n 2,k is the noise signal of the receiving antenna on the second symbol and the kth subcarrier.
  • channel estimation using LTF can be implemented by equation (4).
  • inv() represents the matrix inversion
  • the embodiment of the present invention introduces the data stream transmission scenario shown in FIG. 15 as an example.
  • the sender device group includes two sender devices, STA1 and STA2. Each sender device has two transmit antennas, and the sink device is an AP.
  • the sending end device performs the operation of “sending the data part of the data frame in the data stream to the receiving end device”, and adopts the diversity sending manner to obtain more gains, and the specific implementation manner can be implemented by the following steps:
  • step 1 a combination of at least one of the transmitting antennas is obtained, and the combination of the transmitting antennas is a set of a plurality of the transmitting antennas belonging to different transmitting end devices.
  • a combination manner in which a transmitting end device acquires at least one type of transmitting antenna can pass The first or second method described below is implemented.
  • the transmitting device sets a plurality of transmitting antennas belonging to different transmitting devices to be a combination of transmitting antennas, so as to obtain a combination manner of at least one transmitting antenna.
  • a plurality of transmitting antennas belonging to different transmitting end devices exist in four combinations as shown in Table 1, that is, a combination manner in which the transmitting end device acquires four types of transmitting antennas.
  • Combination method 1 (transmit antenna 1, transmit antenna 3) Combination mode 2 (transmit antenna 1, transmit antenna 4)
  • Combination method 3 (transmit antenna 2, transmit antenna 3)
  • Combination method 4 (transmit antenna 2, transmit antenna 4)
  • the transmitting device receives the combination of the transmitting antennas fed back by the receiving device, and the combined manner of the feedback transmitting antennas is performed by the receiving device after performing channel estimation according to the pilot signals.
  • the combination of different transmit antennas may have different gains on the same channel.
  • the receiver device may first select a combination of high-gain transmit antennas according to channel quality and feed back to the transmit end.
  • the device, the transmitting device, and the combination of the transmitting antennas fed back by the receiving device are used as a combination of the transmitting antennas to be used later.
  • the preset requirement may be a combination of one or more transmit antennas that have the best channel gain.
  • Step 2 Determine at least one resource unit, where the resource unit is composed of a time domain resource and a frequency domain resource.
  • the sending end device determines at least one resource unit on the transmission resource, and it is pointed out that the resource unit determined by the receiving end device should be consistent with the sending end device to ensure the sending and receiving correspondence.
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource; the resource unit is composed of one or more channels on the frequency domain resource, or one on the frequency domain resource.
  • Group subcarrier composition The composition of the resource unit in the frequency domain can be understood to be composed of one or more channels if multi-channel technology is adopted, and a group of sub-carriers if OFDM technology is adopted.
  • Step 3 Send, in each preset transmission period, the data part to the receiving end device by using the specified combination of the sending antennas by using the resource unit.
  • the transmitting device acquires the combined mode of the transmitting antenna
  • the first method in step 1 is adopted, that is, a plurality of transmitting antennas belonging to different transmitting devices are set as a combination of transmitting antennas, thereby obtaining A combination of at least one transmit antenna.
  • the transmitting end device acquires a combination manner of M types of transmitting antennas, where the M is a natural number. Then, the transmitting device sends a data part to the receiving end device by using a combination of the Nth type of transmitting antennas through a resource unit in a transmission period of sequence number N, where N is a natural number not greater than M, and the sequence number of the sending period is The loop is sorted in the order of 1 to M.
  • the transmitting device can obtain a combination of four different transmitting antennas, and can set four different transmission periods.
  • the specific implementation process refer to the schematic diagram of the time diversity mode shown in FIG. 16, that is, the sender device.
  • the combination method 1 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the transmitting end device acquires the combination manner of the M types of transmitting antennas and the J types of the combined manners of the M types of transmitting antennas, where M and J are natural numbers. Then, the transmitting device transmits the data part to the receiving end device by using the Kth resource unit in the transmission period of the sequence number N by using the Kth resource unit in the Kth resource unit, wherein, For a natural number not greater than M, the serial number of the transmission cycle is cyclically sorted in the order of 1 to M, and K is a natural number not greater than J.
  • the transmitting device can obtain a combination of four different transmitting antennas.
  • 12 types of arrangements can be obtained, and Set 4 different transmission periods to determine 0 to 12 resource units.
  • the specific implementation process refer to the schematic diagram of the time and frequency diversity mode shown in Figure 17.
  • the example only identifies two resource units, and only two types of arrangement are selected, that is, "combination mode 1, combination mode 2, Combination mode 3, combination mode 4" and "combination mode 4, combination mode 3, combination mode 2, combination mode 1" two types of arrangement, then the transmitting device,
  • the combination method 1 is used to transmit the data portion
  • the combination method 4 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 4 is used to transmit the data portion, and on the resource unit 2, the combination method 1 is used to transmit the data portion;
  • the transmitting device acquires the combined mode of the transmitting antenna
  • the second method in step 1 is adopted, that is, the transmitting device receives the combined manner of the transmitting antennas fed back by the receiving device.
  • the transmitting device only needs to adopt a combination of the feedback transmitting antennas to transmit the data portion of the data frame in the data stream.
  • the transmitting device can send the data portion analogously to the two alternative embodiments described above.
  • the combination mode 1 is a combination mode of the transmitting antennas fed back by the receiving device, and then the transmitting device,
  • the data portion is transmitted in combination 1 on one resource unit. Until the message is transferred.
  • the combination mode 1 and the combination mode 3 are combinations of the transmitting antennas fed back by the receiving device, then the transmitting device,
  • the combination method 1 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 1 is used to transmit the data portion
  • the sender device in the embodiment of the present invention first sends a frame header portion of the data frame in the data stream to the receiver device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to the sender device group.
  • the total number of all transmitting antennas for transmitting data streams of all the transmitting devices is that the data portion of the data frames in the transmitted data stream is diversityd in the embodiment of the present invention, so that the data portion includes all the transmissions in the transmitting device group.
  • the message sent by the transmitting antenna of the end device can ensure that the receiving end device can obtain the channel information corresponding to all transmitting antennas by carrying the pilot signals of all transmitting antennas in the frame header portion of the data frame; then the transmitting end device is further sent to the receiving end device.
  • the data portion of the data frame in the data stream is sent, wherein the data portion has been divided, and the transmission gain of the WiFi can be improved.
  • FIG. 6 is a schematic flowchart diagram of another method for transmitting a data stream according to an embodiment of the present invention, where the method is applied to a wireless communication system using a multiple input multiple output technology, where the wireless communication system includes a receiving end device and is sent by multiple a sender device group composed of end devices, wherein at least one of the sender devices includes multiple transmit antennas, and the total number of data streams received by the receiver device is smaller than all of the sender devices in the sender device group.
  • the total number of transmit antennas that send data streams which can include:
  • the frame header part of the data frame in the data stream is sent to the receiving end device, where the frame header part carries a specified number of pilot signals, where the specified quantity is equal to all the sending end devices in the sending end device group are used for sending.
  • the total number of transmit antennas of the data stream is the frame header part of the data frame in the data stream.
  • the manner in which the frame header portion of the data frame carries the pilot signal is a distinguishing technical feature from the existing standard, for example, assuming that there are m transmitting antennas for transmitting data streams, and There are n (n ⁇ m) data streams transmitted to the receiving device.
  • the existing standard only the pilot signals of the n transmitting antennas are carried in the frame header portion of the data frame in the data stream, and the solution is optimal.
  • the diversity or selection effect requires that the pilot signals of the m transmit antennas be carried in the header portion of the data frame.
  • S202 Acquire at least one combination manner of the sending antennas, where the sending antennas are combined in a set of multiple sending antennas belonging to different sending end devices.
  • the embodiment of the present invention introduces the data stream transmission scenario shown in FIG. 15 as an example.
  • the sender device group includes two sender devices, STA1 and STA2. Each sender device has two transmit antennas, and the sink device is an AP.
  • a plurality of transmitting antennas belonging to different transmitting end devices exist in four combinations as shown in Table 1, that is, a combination manner in which the transmitting end device acquires four types of transmitting antennas.
  • S203 Determine at least one resource unit, where the resource unit is composed of a time domain resource and a frequency domain resource.
  • the sending end device determines at least one resource unit on the transmission resource, and it is pointed out that the resource unit determined by the receiving end device should be consistent with the sending end device to ensure the sending and receiving correspondence.
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource; the resource unit is composed of one or more channels on the frequency domain resource, or one on the frequency domain resource.
  • Group subcarrier composition The composition of the resource unit in the frequency domain can be understood to be composed of one or more channels if multi-channel technology is adopted, and a group of sub-carriers if OFDM technology is adopted.
  • S204 Send, in each preset transmission period, the data part to the receiving end device by using the specified combination of the sending antennas by using the resource unit.
  • the transmitting end device acquires a combination manner of M types of transmitting antennas, where the M is a natural number. Then, the transmitting device sends a data part to the receiving end device by using a combination of the Nth type of transmitting antennas through a resource unit in a transmission period of sequence number N, where N is a natural number not greater than M, and the sequence number of the sending period is The loop is sorted in the order of 1 to M.
  • the transmitting device can obtain a combination of four different transmitting antennas, and can set four different transmission periods.
  • the specific implementation process refer to the schematic diagram of the time diversity mode shown in FIG. 16, that is, the sender device.
  • the combination method 1 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the transmitting end device acquires the combination manner of the M types of transmitting antennas and the J types of the combined manners of the M types of transmitting antennas, where M and J are natural numbers. Then, the transmitting device transmits the data part to the receiving end device by using the Kth resource unit in the transmission period of the sequence number N by using the Kth resource unit in the Kth resource unit, wherein, For a natural number not greater than M, the serial number of the transmission cycle is cyclically sorted in the order of 1 to M, and K is a natural number not greater than J.
  • the sender device can obtain a combination of four different transmit antennas. According to the combination of the four transmit antennas, 12 arrangements can be obtained, and four different transmissions can be set. Cycle, determine 0 to 12 resource units.
  • the specific implementation process refer to the schematic diagram of the time and frequency diversity mode shown in Figure 17.
  • the example only identifies two resource units, and only two types of arrangement are selected, that is, "combination mode 1, combination mode 2, Combination mode 3, combination mode 4" and "combination mode 4, combination mode 3, combination mode 2, combination mode 1" two types of arrangement, then the transmitting device,
  • the combination method 1 is used to transmit the data portion
  • the combination method 4 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 4 is used to transmit the data portion, and on the resource unit 2, the combination method 1 is used to transmit the data portion;
  • the sender device in the embodiment of the present invention first sends a frame header portion of the data frame in the data stream to the receiver device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to the sender device group.
  • the total number of all transmitting antennas for transmitting data streams of all the transmitting devices is that the data portion of the data frames in the transmitted data stream is diversityd in the embodiment of the present invention, so that the data portion includes all the transmissions in the transmitting device group.
  • the message sent by the transmitting antenna of the end device can ensure that the receiving device can obtain all the signals by carrying the pilot signals of all transmitting antennas in the frame header portion of the data frame. Transmitting the channel information corresponding to the antenna; then the transmitting device sends the data portion of the data frame in the data stream to the receiving device, wherein the data portion has been divided, and the transmission gain of the WiFi can be improved.
  • FIG. 7 is a schematic flowchart diagram of a method for transmitting a data stream according to an embodiment of the present invention, where the method is applied to a wireless communication system using multiple input multiple output technology, where the wireless communication system includes a receiving end device and multiple transmitting ends.
  • a transmitting device group of the device wherein at least one of the transmitting devices includes a plurality of transmitting antennas, and the total number of data streams received by the receiving device is smaller than all of the transmitting devices in the transmitting device group for sending
  • the total number of transmit antennas of the data stream may include:
  • the sending end device sends, to the receiving end device, a frame header portion of the data frame in the data stream, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to all the transmitting device devices in the sending device group.
  • the manner in which the frame header portion of the data frame carries the pilot signal is a distinguishing technical feature from the existing standard, for example, assuming that there are m transmitting antennas for transmitting data streams, and There are n (n ⁇ m) data streams transmitted to the receiving device.
  • the existing standard only the pilot signals of the n transmitting antennas are carried in the frame header portion of the data frame in the data stream, and the solution is optimal.
  • the diversity or selection effect requires that the pilot signals of the m transmit antennas be carried in the header portion of the data frame.
  • the receiving end device receives a frame header portion of a data frame in a data stream sent by the sending end device.
  • the receiving end device performs channel estimation according to the specified number of pilot signals carried by the frame header portion of the data frame to obtain channel information corresponding to the transmitting antennas for transmitting the data stream.
  • the receiving device selects a combination of one or more of the transmitting antennas whose quality of the corresponding channel information meets a preset requirement from all the transmitting antennas for transmitting the data stream, and is selected.
  • the combination of the one or more of the transmitting antennas is fed back to the transmitting device.
  • the sending end device sends the data part of the data frame in the data stream to the receiving end device.
  • the embodiment of the present invention introduces the data stream transmission scenario shown in FIG. 15 as an example.
  • the sender device group includes two sender devices, STA1 and STA2. Each sender device has two transmit antennas, and the sink device is an AP.
  • the sending end device performs the operation of “sending the data part of the data frame in the data stream to the receiving end device”, and adopts the diversity sending manner to obtain more gains, and the specific implementation manner can be implemented by the following steps:
  • Step 1 Acquire at least one combination of the transmitting antennas.
  • the combination manner in which the transmitting end device obtains at least one type of transmitting antenna can be implemented in the following manner or manner 2.
  • the transmitting device sets a plurality of transmitting antennas belonging to different transmitting devices to be a combination of transmitting antennas, so as to obtain a combination manner of at least one transmitting antenna.
  • a plurality of transmitting antennas belonging to different transmitting end devices exist in four combinations as shown in Table 1, that is, a combination manner in which the transmitting end device acquires four types of transmitting antennas.
  • the transmitting device receives the combination of the transmitting antennas fed back by the receiving device, and the combined manner of the transmitting antennas is determined by the receiving device detecting the channels used by the transmitting antennas according to the pilot signals.
  • the combination of different transmit antennas may have different gains on the same channel.
  • the receiver device may first select a combination of high-gain transmit antennas according to channel quality and feed back to the transmit end.
  • the device, the transmitting device, and the combination of the transmitting antennas fed back by the receiving device are used as a combination of the transmitting antennas to be used later.
  • the preset requirement may be a combination of one or more transmit antennas that have the best channel gain.
  • Step 2 Determine at least one resource unit, where the resource unit is composed of a time domain resource and a frequency domain resource.
  • the sending end device determines at least one resource unit on the transmission resource, and it is pointed out that the resource unit determined by the receiving end device should be consistent with the sending end device to ensure the sending and receiving correspondence.
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource; the resource unit is composed of one or more channels on the frequency domain resource, or one on the frequency domain resource.
  • Group subcarrier composition The composition of the resource unit in the frequency domain can be understood to be composed of one or more channels if multi-channel technology is adopted, and a group of sub-carriers if OFDM technology is adopted.
  • Step 3 in each preset transmission period, by using the resource unit, adopting the specified The combination of sending antennas sends the data portion to the receiving device.
  • the transmitting device acquires the combined mode of the transmitting antenna
  • the first method in step 1 is adopted, that is, a plurality of transmitting antennas belonging to different transmitting devices are set as a combination of transmitting antennas, thereby obtaining A combination of at least one transmit antenna.
  • the transmitting end device acquires a combination manner of M types of transmitting antennas, where the M is a natural number. Then, the transmitting device sends a data part to the receiving end device by using a combination of the Nth type of transmitting antennas through a resource unit in a transmission period of sequence number N, where N is a natural number not greater than M, and the sequence number of the sending period is The loop is sorted in the order of 1 to M.
  • the transmitting end device acquires the combination manner of the M types of transmitting antennas and the J types of the combined manners of the M types of transmitting antennas, where M and J are natural numbers. Then, the transmitting device transmits the data part to the receiving end device by using the Kth resource unit in the transmission period of the sequence number N by using the Kth resource unit in the Kth resource unit, wherein, For a natural number not greater than M, the serial number of the transmission cycle is cyclically sorted in the order of 1 to M, and K is a natural number not greater than J.
  • the transmitting device acquires the combined mode of the transmitting antenna
  • the second method in step 1 is adopted, that is, the transmitting device receives the combined manner of the transmitting antennas fed back by the receiving device.
  • the transmitting device only needs to adopt a combination of the feedback transmitting antennas to transmit the data portion of the data frame in the data stream.
  • the transmitting device can send the data portion analogously to the two alternative embodiments described above.
  • the receiving end device receives a data part of a data frame in the data stream sent by the sending end device.
  • the receiving end device receives the data part sent by the sending end device by using at least one resource unit and using a specified combination of at least one transmitting antenna in each preset sending period.
  • the data part of the data frame in the data stream is sent by the sending end device as described in S304.
  • the receiving end device only needs to send and send to the corresponding sending period and corresponding resource unit in each mode.
  • the end device can use the data part sent by the corresponding combination of the transmitting antennas. As for each specific receiving mode, it will not be repeated here.
  • the receiving end device performs signal detection on the data part of the data frame according to the channel information to obtain data information of the data part.
  • the receiving device performs signal detection on the data portion of the data frame to obtain data information of the data portion according to channel information corresponding to the transmitting antenna in the combined manner of the transmitting antenna.
  • the receiving end device uses the channel information corresponding to the transmitting antenna in the combination manner of the Nth type of transmitting antennas, and adopts the Nth type to the transmitting end device.
  • the data portion transmitted by the combination of the transmitting antennas performs signal detection to acquire data information of the data portion.
  • the receiving end device according to the channel information corresponding to the transmitting antenna in the combination mode of the Nth transmitting antenna in the Kth type arrangement manner, The transmitting end device performs signal detection by using the data portion sent by the combination of the Nth transmission antennas in the Kth arrangement manner to acquire data information of the data portion.
  • the sender device in the embodiment of the present invention first sends a frame header portion of the data frame in the data stream to the receiver device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to the sender device group.
  • the total number of all transmitting antennas for transmitting data streams of all the transmitting devices is that the data portion of the data frames in the transmitted data stream is diversityd in the embodiment of the present invention, so that the data portion includes all the transmissions in the transmitting device group.
  • the message sent by the transmitting antenna of the end device can ensure that the receiving end device can obtain the channel information corresponding to all transmitting antennas by carrying the pilot signals of all transmitting antennas in the frame header portion of the data frame; then the transmitting end device is further sent to the receiving end device.
  • the data portion of the data frame in the data stream is sent, wherein the data portion has been divided, and the transmission gain of the WiFi can be improved.
  • FIG. 8 is a schematic flowchart diagram of another method for transmitting a data stream according to an embodiment of the present invention.
  • the method is applied to a wireless communication system using a multiple input multiple output technology, where the wireless communication system includes a receiving end device and is sent by multiple a sender device group composed of end devices, wherein at least one of the sender devices includes multiple transmit antennas, and the total number of data streams received by the receiver device is smaller than all of the sender devices in the sender device group.
  • the total number of transmit antennas that send data streams which can include:
  • the sending end device sends, to the receiving end device, a frame header portion of the data frame in the data stream, where the frame is
  • the header portion carries a specified number of pilot signals equal to the total number of all transmit antennas used to transmit data streams for all of the source devices in the source device group.
  • the manner in which the frame header portion of the data frame carries the pilot signal is a distinguishing technical feature from the existing standard, for example, assuming that there are m transmitting antennas for transmitting data streams, and There are n (n ⁇ m) data streams transmitted to the receiving device.
  • the existing standard only the pilot signals of the n transmitting antennas are carried in the frame header portion of the data frame in the data stream, and the solution is optimal.
  • the diversity or selection effect requires that the pilot signals of the m transmit antennas be carried in the header portion of the data frame.
  • the receiving end device receives a frame header portion of a data frame in a data stream sent by the sending end device.
  • the receiving end device performs channel estimation according to the specified number of pilot signals carried by the frame header portion of the data frame to obtain channel information corresponding to the transmitting antennas for transmitting the data stream.
  • the receiving end device After receiving the frame header part of the data frame in the data stream sent by the sending end device, the receiving end device detects, according to the pilot signal, a channel used by the transmitting antennas of all the transmitting end devices in the transmitting device group.
  • the receiving end device selects, from the transmitting antennas for sending data streams, a combination manner of one or more types of the transmitting antennas whose quality of the corresponding channel information meets a preset requirement.
  • the combination of different transmit antennas will have different gains on the same channel, and the preset requirement may be a combination of one or more transmit antennas with the best channel gain.
  • the receiving end device feeds back the selected combination manner of the one or more types of the sending antennas to the sending end device.
  • the sending end device receives a combination manner of the transmitting antennas fed back by the receiving end device.
  • the source device determines at least one resource unit, where the resource unit is composed of a time domain resource and a frequency domain resource.
  • the sending end device determines at least one resource unit on the transmission resource, and it is pointed out that the resource unit determined by the receiving end device should be consistent with the sending end device to ensure the sending and receiving correspondence.
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource; the resource unit is composed of one or more channels on the frequency domain resource, or one on the frequency domain resource.
  • Group subcarrier composition wherein, the composition of the resource unit in the frequency domain can be understood as Multi-channel technology is used to form one or more channels; if OFDM technology is used, it consists of a group of sub-carriers.
  • the transmitting end device sends the data part to the receiving end device by using the specified combination of the sending antennas by using the resource unit in each preset sending period.
  • the transmitting end device uses a combined manner of the feedback transmitting antenna to transmit the data portion of the data frame in the data stream.
  • the transmitting device can transmit the data portion analogously to the two alternative embodiments in step S304 of FIG.
  • the receiving end device receives a data part of a data frame in the data stream sent by the sending end device.
  • the receiving end device receives the data part sent by the sending end device by using at least one resource unit and using a specified combination of at least one transmitting antenna in each preset sending period.
  • the receiving end device performs signal detection on the data part of the data frame according to the channel information to obtain data information of the data part.
  • the receiving device performs signal detection on the data portion of the data frame to obtain data information of the data portion according to channel information corresponding to the transmitting antenna in the combined manner of the transmitting antenna.
  • the receiving end device uses the channel information corresponding to the transmitting antenna in the combination manner of the Nth type of transmitting antennas, and adopts the Nth type to the transmitting end device.
  • the data portion transmitted by the combination of the transmitting antennas performs signal detection to acquire data information of the data portion.
  • the receiving end device according to the channel information corresponding to the transmitting antenna in the combination mode of the Nth transmitting antenna in the Kth type arrangement manner, The transmitting end device performs signal detection by using the data portion sent by the combination of the Nth transmission antennas in the Kth arrangement manner to acquire data information of the data portion.
  • the sender device in the embodiment of the present invention first sends a frame header portion of the data frame in the data stream to the receiver device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to the sender device group.
  • the total number of all transmit antennas used by all sender devices to send data streams the reason
  • the data portion of the data frame in the transmitted data stream is divided, and the data portion includes a message sent by the transmitting antennas of all the transmitting end devices in the transmitting device group, through the frame header portion of the data frame.
  • Carrying the pilot signals of all the transmitting antennas can ensure that the receiving end device can obtain the channel information corresponding to all the transmitting antennas; then the transmitting end device sends the data part of the data frames in the data stream to the receiving end device, wherein the data part has been divided, and the data part can be divided into Realize the transmission gain of WiFi.
  • FIG. 9 is a schematic structural diagram of a device at a transmitting end according to an embodiment of the present invention.
  • the transmitting end device is applied to a wireless communication system employing a multiple input multiple output technology, and the wireless communication system includes a receiving end device and a transmitting end device group composed of a plurality of the transmitting end devices, wherein at least one of the transmitting ends
  • the device includes a plurality of transmitting antennas, and the total number of data streams received by the receiving device is smaller than the total number of transmitting antennas for transmitting data streams of all the transmitting devices in the transmitting device group, as shown in the present invention.
  • the transmitting device in the example may include at least a header portion transmitting module 510 and a data portion transmitting module 520, where:
  • the header portion sending module 510 is configured to send, to the receiving end device, a header portion of the data frame in the data stream, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to all the sending in the sending device group. The total number of all transmit antennas of the end device used to transmit the data stream.
  • the manner in which the frame header portion of the data frame carries the pilot signal is a distinguishing technical feature from the existing standard, for example, assuming that there are m transmitting antennas for transmitting data streams, and There are n (n ⁇ m) data streams transmitted to the receiving device.
  • the existing standard only the pilot signals of the n transmitting antennas are carried in the frame header portion of the data frame in the data stream, and the solution is optimal.
  • the diversity or selection effect requires that the pilot signals of the m transmit antennas be carried in the header portion of the data frame.
  • the data part sending module 520 is configured to send the data part of the data frame in the data stream to the receiving end device.
  • the data part sending module 520 may further include an antenna combination acquiring unit 521, a resource unit acquiring unit 522, and a data part sending unit 523, as shown in FIG.
  • the antenna combination acquiring unit 521 is configured to acquire a combination manner of at least one of the transmitting antennas, where the combination manner of the transmitting antennas is a set of the plurality of transmitting antennas belonging to different transmitting end devices.
  • the embodiment of the present invention introduces the data stream transmission scenario shown in FIG. 15 as an example.
  • the sender device group includes two sender devices, STA1 and STA2. Each sender device has two transmit antennas, and the sink device is an AP.
  • the combination manner in which the antenna combination acquiring unit 521 acquires at least one type of transmitting antenna can be implemented by the following manner or the second method.
  • the antenna combination acquiring unit 521 sets a plurality of transmitting antennas belonging to different transmitting end devices as a combination of transmitting antennas, thereby acquiring a combination manner of at least one transmitting antenna.
  • a plurality of transmitting antennas belonging to different transmitting end devices exist in four combinations as shown in Table 1, that is, a combination manner in which the transmitting end device acquires four types of transmitting antennas.
  • the antenna combination acquiring unit 521 receives the combination manner of the transmitting antennas fed back by the receiving device, and the combined manner of the feedback transmitting antennas is performed by the receiving device after performing channel estimation according to the pilot signals.
  • the combination of different transmit antennas has different gains on the same channel.
  • the receiver device can select the combination of the high-gain transmit antennas according to the channel quality and feed back to the antenna combination.
  • the obtaining unit 521, the antenna combination acquiring unit 521 further uses the combination of the transmitting antennas fed back by the receiving device as a combination of the transmitting antennas to be used later.
  • the preset requirement may be a combination of one or more transmit antennas that have the best channel gain.
  • the resource unit acquiring unit 522 is configured to determine at least one resource unit, where the resource unit is composed of a time domain resource and a frequency domain resource.
  • the resource unit acquiring unit 522 determines at least one resource unit on the transmission resource, and it should be noted that the resource unit determined by the receiving end device should be consistent with the sending end device to ensure the corresponding transmission and reception.
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource; the resource unit is composed of one or more channels on the frequency domain resource, or one on the frequency domain resource.
  • Group subcarrier composition The composition of the resource unit in the frequency domain can be understood to be composed of one or more channels if multi-channel technology is adopted, and a group of sub-carriers if OFDM technology is adopted.
  • the data part sending unit 523 is configured to pass the resource unit in each preset sending period.
  • the data portion is transmitted to the receiving device by using a combination of the specified transmitting antennas.
  • the antenna combination acquiring unit 521 adopts the first method in step 1, that is, a plurality of transmitting antennas belonging to different transmitting end devices are set as a combination of transmitting antennas, This acquires a combination of at least one transmit antenna.
  • the antenna combination acquiring unit 521 acquires a combination manner of M types of transmitting antennas, where the M is a natural number. Then, the data part transmitting unit 523 transmits a data part to the receiving end device by using a combination of the Nth type of transmitting antennas through a resource unit in a transmission period of sequence number N, where N is a natural number not greater than M, and the transmission period is The serial numbers are sorted in a sequence from 1 to M.
  • the antenna combination obtaining unit 521 can acquire a combination of four different transmitting antennas, and can set four different transmission periods.
  • the combination method 1 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the antenna combination acquiring unit 521 acquires the combination manner of the M types of transmitting antennas, and the J types of the combinations of the M types of transmitting antennas, wherein M and J are natural numbers. Then, the data part transmitting unit 523 transmits the data part to the receiving end device by using the Kth resource unit and the Nth transmitting antenna in the Kth sorting mode in the transmission period of the sequence number N, wherein , N is a natural number not greater than M, the serial number of the transmission cycle is cyclically sorted in the order of 1 to M, and K is a natural number not greater than J.
  • the antenna combination acquiring unit 521 can obtain a combination of four different transmitting antennas, and according to the combination of the four transmitting antennas, 12 types of arrangement can be obtained, and 4 different types can be set.
  • the transmission period determines 0 to 12 resource elements.
  • the specific implementation process Please refer to the schematic diagram of the time and frequency diversity mode shown in FIG. 17.
  • the example only determines two resource units, and only two types of arrangement are selected, that is, "combination mode 1, combination mode 2, combination mode 3, combination "4" and "Combination 4, Combination 3, Combination 2, Combination 1", then the data portion transmission unit 523,
  • the combination method 1 is used to transmit the data portion
  • the combination method 4 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 2 is used to transmit the data portion
  • the combination method 4 is used to transmit the data portion, and on the resource unit 2, the combination method 1 is used to transmit the data portion;
  • the antenna combination acquiring unit 521 adopts the second method in the first step, that is, the antenna combination acquiring unit 521 receives the combination manner of the transmitting antennas fed back by the receiving end device.
  • the data part transmitting unit 523 only needs to adopt a combined manner of the feedback transmitting antennas to transmit the data part of the data frame in the data stream.
  • the data portion transmitting unit 523 can transmit the data portion analogously to the above two alternative embodiments.
  • the combination mode 1 is a combination manner of the transmitting antennas fed back by the receiving device, and then the data part transmitting unit 523,
  • the data portion is transmitted in combination 1 on one resource unit. Until the message is transferred.
  • the combination mode 1 and the combination mode 3 are combinations of the transmitting antennas fed back by the receiving device, then the data part transmitting unit 523,
  • the combination method 1 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion
  • the combination method 3 is used to transmit the data portion. Dividing, on the resource unit 2, using the combination mode 1, transmitting the data portion;
  • FIG. 11 is a schematic structural diagram of a receiving end device according to an embodiment of the present invention.
  • the receiving end device is applied to a wireless communication system employing a multiple input multiple output technology, the wireless communication system including the receiving end device and a transmitting end device group composed of a plurality of transmitting end devices, wherein at least one of the transmitting ends
  • the device includes a plurality of transmitting antennas, and the total number of data streams received by the receiving device is smaller than the total number of transmitting antennas for transmitting data streams of all the transmitting devices in the transmitting device group, as shown in the present invention.
  • the receiving device in the example may include at least a frame header portion receiving module 610, a channel information acquiring module 620, a data portion receiving module 630, and a data information acquiring module 640, where:
  • the header portion receiving module 610 is configured to receive a frame header portion of a data frame in a data stream sent by the sending end device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to all in the sending end device group. The total number of all transmit antennas used by the transmitting device to transmit data.
  • the manner in which the frame header portion of the data frame carries the pilot signal is a distinguishing technical feature from the existing standard, for example, assuming that there are m transmitting antennas for transmitting data streams, and There are n (n ⁇ m) data streams transmitted to the receiving device.
  • the existing standard only the pilot signals of the n transmitting antennas are carried in the frame header portion of the data frame in the data stream, and the solution is optimal.
  • the diversity or selection effect requires that the pilot signals of the m transmit antennas be carried in the header portion of the data frame.
  • the channel information obtaining module 620 is configured to perform channel estimation according to the specified number of pilot signals carried in a header portion of the data frame to obtain channel information corresponding to the transmitting antennas for transmitting a data stream.
  • the data part receiving module 630 is configured to receive a data part of the data frame in the data stream sent by the sending end device.
  • the data part receiving module 630 is configured to receive, by using at least one resource unit, the data part that is sent by the sending end device in a combination of the specified at least one transmitting antenna by using at least one resource unit in each preset sending period.
  • the combination of the transmitting antennas is a combination of a plurality of transmitting antennas belonging to different transmitting end devices.
  • the resource unit is composed of one or more consecutive OFDM symbols on a time domain resource;
  • the resource unit is composed of one or more channels on a frequency domain resource or a group of subcarriers on a frequency domain resource.
  • the data part receiving module 630 is specifically configured to: in the sending period with the sequence number N, receive, by using one of the resource units, the sending end device by using the Nth type of sending The data portion sent by the combination of the antennas, wherein the combination of the transmitting antennas has M types, the M is a natural number, the N is a natural number not greater than M, and the serial number of the sending period is 1 to M The order of the loop is sorted.
  • the method for the transmitting end device to send the data part of the data frame in the data stream may be: assuming that the transmitting end device acquires a combination manner of the M types of transmitting antennas, where the M is a natural number. Then, the transmitting device sends a data part to the receiving end device by using a combination of the Nth type of transmitting antennas through a resource unit in a transmission period of sequence number N, where N is a natural number not greater than M, and the sequence number of the sending period is The loop is sorted in the order of 1 to M.
  • the data part receiving module 630 is specifically configured to: in the sending period with the sequence number N, receive the Kth type by using the Kth resource unit The data portion transmitted by the combination of the Nth transmit antennas in the arrangement, wherein there are M types of combinations of the transmit antennas, and J types of the transmit antennas are combined.
  • the M and the J are natural numbers
  • the N is a natural number not greater than M
  • the serial numbers of the transmission periods are cyclically sorted in the order of 1 to M
  • the K is a natural number not greater than J.
  • the method for the transmitting end device to send the data part of the data frame in the data stream may be: assuming that the transmitting end device acquires the combination manner of the M types of transmitting antennas, and the J types of the combinations of the M types of transmitting antennas are obtained. , where M and J are natural numbers. Then, the transmitting device transmits the data part to the receiving end device by using the Kth resource unit in the transmission period of the sequence number N by using the Kth resource unit in the Kth resource unit, wherein, For a natural number not greater than M, the serial number of the transmission cycle is cyclically sorted in the order of 1 to M, and K is a natural number not greater than J.
  • the data information obtaining module 640 is configured to perform signal detection on the data portion of the data frame to obtain data information of the data portion according to the channel information corresponding to the transmitting antenna in the combined manner of the specified transmitting antenna.
  • the data information obtaining module 640 is configured according to the specified combination manner of the transmitting antennas. Transmitting channel information corresponding to the antenna, performing signal detection on the data portion of the data frame to obtain data information of the data portion.
  • the data information acquiring module 640 adopts the Nth type of the transmitting end device according to the channel information corresponding to the transmitting antenna in the combination manner of the Nth transmitting antenna.
  • the data portion transmitted by the combined manner of the transmitting antenna performs signal detection to acquire data information of the data portion.
  • the data information obtaining module 640 is configured to: according to the channel information corresponding to the transmitting antenna in the combination manner of the Nth transmitting antennas in the Kth arrangement manner, And performing, by the transmitting end device, the data part sent by using a combination manner of the Nth transmitting antennas in the Kth arrangement manner to perform signal detection to acquire data information of the data part.
  • the receiving end device in the embodiment of the present invention may further include an antenna combination selecting module 650 and an antenna combining feedback module 660, where:
  • the antenna combination selection module 650 is configured to select, from the transmitting antennas for transmitting data streams, a combination manner of one or more of the transmitting antennas whose quality of the corresponding channel information meets a preset requirement.
  • the combination of different transmit antennas will have different gains on the same channel, and the preset requirement may be a combination of one or more transmit antennas with the best channel gain.
  • the antenna combination selection module 650 detects the channel used by the transmitting antennas of all the transmitting devices in the transmitting device group according to the pilot signal, and then according to the pilot signal, Channel quality selects the combination of one or more transmit antennas that have the best channel gain.
  • the antenna combination feedback module 660 is configured to feed back the selected combination manner of the one or more types of the sending antennas to the sending end device.
  • the method for the transmitting end device to send the data part of the data frame in the data stream may be: the transmitting end device only needs to adopt a combined manner of the feedback transmitting antenna to send the data part of the data frame in the data stream.
  • the transmitting device can send the data portion analogously to the two alternative embodiments described above.
  • FIG. 12 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention.
  • the wireless communication system in the illustrated embodiment of the present invention may include at least a transmitting device 710 and a receiving device 720, where:
  • the sending end device 710 is a transmitting end device as described above with reference to FIG. 9 , and is configured to send, to the receiving end device 720 , a frame header portion of a data frame in the data stream, where the frame header portion carries a specified number of pilot signals.
  • the specified number is equal to the total number of all the transmitting antennas for transmitting data streams of all the transmitting devices in the transmitting device group.
  • the receiving end device 720 is a receiving end device as described above with reference to FIG. 11 and is configured to receive a frame header portion of a data frame in a data stream sent by the transmitting end device 710, where the frame header portion carries a specified number of pilots. a signal, the specified number being equal to a total number of all the transmitting antennas for transmitting data of all the transmitting devices in the transmitting device group; performing according to the specified number of pilot signals carried in the header portion of the data frame Channel estimation to obtain channel information corresponding to all the transmitting antennas for transmitting the data stream; receiving a data portion of the data frame in the data stream sent by the transmitting end device 710; and the data frame according to the channel information
  • the data portion performs signal detection to obtain data information of the data portion.
  • FIG. 13 is a schematic structural diagram of a transmitting end device according to an embodiment of the present invention.
  • the transmitting end device may include: at least one processor 801, such as a CPU, at least one antenna interface 803, and a memory 804, at least A communication bus 802.
  • the communication bus 802 is used to implement connection communication between these components.
  • the memory 804 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 804 may also be at least one storage device located away from the foregoing processor 801.
  • a set of program codes is stored in the memory 804, and the processor 801 is configured to call the program code stored in the memory 804 for performing the following operations:
  • the specific operation of the processor 801 to send the data part of the data frame in the data stream to the receiving end device is:
  • the resource unit being composed of a time domain resource and a frequency domain resource
  • the specific operation performed by the processor 801 to obtain a combination manner of the at least one of the sending antennas may be:
  • Receiving a combination manner of the transmitting antennas fed back by the receiving end device, where the feedback transmitting antennas are combined by the receiving end device after performing channel estimation according to the pilot signals, from all the channels for transmitting data streams The combination of one or more of the transmit antennas whose quality of the corresponding channel information selected in the transmit antenna meets a preset requirement.
  • the processor 801 performs, in each preset transmission period, the specific operation of sending the data part to the receiving end device by using the specified combination of the sending antennas by using the resource unit:
  • the data part is sent to the receiving end device by using one of the resource units in a combination manner of the Nth type of transmitting antennas, where the N is not greater than M
  • the natural number, the serial number of the transmission cycle is cyclically ordered in the order of 1 to M.
  • the processor 801 performs, in each preset transmission period, the specific operation of sending the data part to the receiving end device by using the specified combination of the sending antennas by using the resource unit:
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource
  • the resource unit is composed of one or more channels on a frequency domain resource or by frequency domain resources A group of subcarriers.
  • FIG. 14 is a schematic structural diagram of a receiving end device according to an embodiment of the present invention.
  • the receiving end device may include: at least one processor 901, such as a CPU, at least one antenna interface 903, and a memory 904, at least A communication bus 902.
  • the communication bus 902 is used to implement connection communication between these components.
  • the memory 904 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 904 may also be at least one storage device located away from the foregoing processor 901.
  • a set of program codes is stored in the memory 904, and the processor 901 is configured to call the program code stored in the memory 904 for performing the following operations:
  • the specific operation of the processor 901 to receive the data part of the data frame in the data stream sent by the sending end device is:
  • the processor 901 performs signal detection on the data portion of the data frame according to the channel information to obtain data information of the data portion:
  • processor 901 further performs:
  • the processor 901 performs, in each preset transmission period, the specific operation of receiving, by using at least one resource unit, the data part that is sent by the sending end device by using a specified combination of at least one transmitting antenna is:
  • the one resource unit Receiving, by the one resource unit, the data part that is sent by the sending end device in a combination manner of the Nth type of the transmitting antenna, where the transmitting antenna is combined in the sending period with the sequence number N
  • the M is a natural number
  • the N is a natural number not greater than M
  • the serial numbers of the transmission periods are cyclically sorted in the order of 1 to M.
  • the processor 901 performs channel detection according to the specified transmit antenna in the combined manner of the transmit antenna, and performs signal detection on the data portion of the data frame to obtain data information of the data portion. :
  • the processor 901 performs, in each preset transmission period, the specific operation of receiving, by using at least one resource unit, the data part sent by the sending end device by using a specified combination of at least one transmitting antenna. :
  • the combination of the transmission antennas is M
  • the combination of the M transmission antennas has J types
  • the M and the J are natural numbers
  • the N is a natural number not greater than M.
  • the sequence numbers of the transmission periods are cyclically ordered in the order of 1 to M
  • the K is a natural number not greater than J.
  • the processor 901 performs channel detection according to the specified transmit antenna in the combined manner of the transmit antenna, and performs signal detection on the data portion of the data frame to obtain data information of the data portion. :
  • the Nth of the Kth arrangement is adopted for the transmitting device
  • the data portion transmitted by the combination of the transmitting antennas performs signal detection to acquire data information of the data portion.
  • the resource unit is composed of one or more consecutive OFDM symbols on the time domain resource
  • the resource unit is composed of one or more channels on a frequency domain resource or a group of subcarriers on a frequency domain resource.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes a plurality of instructions for executing a data stream sending method described in the embodiment of the present invention, as shown in FIG. 5 to FIG. Some or all of the steps in .
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes a plurality of instructions for executing a data stream transmission method described in the embodiments of the present invention, as shown in FIG. 7 to FIG. Some or all of the steps in .
  • the sender device in the embodiment of the present invention first sends a frame header portion of the data frame in the data stream to the receiver device, where the frame header portion carries a specified number of pilot signals, where the specified number is equal to the sender device group.
  • the total number of all transmitting antennas for transmitting data streams of all the transmitting devices is that the data portion of the data frames in the transmitted data stream is diversityd in the embodiment of the present invention, so that the data portion includes all the transmissions in the transmitting device group.
  • the message sent by the transmitting antenna of the end device can ensure that the receiving end device can obtain the channel information corresponding to all transmitting antennas by carrying the pilot signals of all transmitting antennas in the frame header portion of the data frame; then the transmitting end device is further sent to the receiving end device.
  • the data portion of the data frame in the data stream is sent, wherein the data portion has been divided, and the transmission gain of the WiFi can be improved.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

本发明实施例公开了一种数据流的发送方法,包括:向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有用于发送数据流的所述发送端设备的所有发送天线的总数;向所述接收端设备发送所述数据流中数据帧的数据部分。相应地,本发明实施例还公开了一种数据流的接收方法、发送端设备、接收端设备和无线通信系统。采用本发明,可以实现提高WiFi的传输增益。

Description

一种数据流的传输方法、发送端设备、接收端设备及系统 技术领域
本发明涉及无线通信技术领域,尤其涉及一种数据流的传输方法、发送端设备、接收端设备及系统。
背景技术
WiFi(Wireless Fidelity,无线保真)是一种无线通信技术,由于其特有的灵活性,广泛应用于家用和商用环境。随着数据传输量的不断增大,以及传输质量要求的不断增高,开发具有高吞吐率的WiFi技术已成为目前主要研究方向。
MIMO(Multiple-Input Multiple-Output,多输入多输出)技术应用于无线通信系统,其特点在于分别在发射端和接收端配置多个天线进行无线通信,即发射端的多个天线各自独立发送信号,同时接收端用多个天线接收并恢复原信号,形成空间域上多个并行传输的独立信道,可见MIMO系统在不增加系统带宽的情况下,成倍地提高了系统的容量和频率利用率。多用户MIMO技术是指在发射端同时有多个发送端设备,每个发送端设备设有一个或多个天线,这些发送端设备同时向接收端设备发送信号,同时接收端用多个天线接收并恢复原信号,该技术可进一步地有效提高多用户情景下的传输效率。常见WiFi环境中一般存在多个发送端设备(如智能手机、平板电脑和个人电脑等用户设备),可见多用户MIMO技术可应用于WiFi。
多信道技术应用于无线通信系统,若将信道分成若干个子信道,传统技术是给每个发送端设备分配一个子信道用以传输信号,而多信道技术的特点在于给每个发送端设备分配多个子信道,如给一个发送端设备分配相邻的两个子信道,其增大了每个发送端设备的带宽,提高了传输速率。
OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)技术是一种多载波调制技术,其特点在于将信道分成若干个正交子信道,将高速信号转换成并行的低速子数据流,调制到在每个子信道上进行传输,其增大了无线通信系统的频谱利用率。
现有WiFi在多用户MIMO技术上,针对引入多信道技术和OFDM技术 的情景,并未提出对传输信号进行时间分集和/或频率分集的策略,未能更进一步地提高传输增益。
发明内容
本发明实施例提供了一种数据流的传输方法、发送端设备、接收端设备及系统,可以实现提高WiFi的传输增益。
本发明实施例第一方面提供了一种数据流的发送方法,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述方法包括:
向所述接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于所述发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数;
向所述接收端设备发送所述数据流中数据帧的数据部分。
在第一方面的第一种可能实现方式中,所述向所述接收端设备发送所述数据流中数据帧的数据部分,包括:
获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合;
确定至少一个资源单元,所述资源单元由时域资源和频域资源组成;
在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
结合第一方面以及第一方面的第一种可能实现方式,在第二种可能实现方式中,所述获取至少一种所述发送天线的组合方式,包括:
接收所述接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
结合第一方面以及第一方面的第一或第二种可能实现方式,在第三种可能 实现方式中,所述获取至少一种所述发送天线的组合方式,包括:
获取M种所述发送天线的组合方式,其中,所述M为自然数;
所述在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分,包括:
在序号为N的所述发送周期,通过一个所述资源单元,采用第N种所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
结合第一方面以及第一方面的第一或第二种可能实现方式,在第四种可能实现方式中,所述获取至少一种所述发送天线的组合方式,包括:
获取M种所述发送天线的组合方式,以及获取M种所述发送天线的组合方式的J种排列方式,其中,所述M和所述J为自然数;
所述在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分,包括:
在序号为N的所述发送周期,通过第K个所述资源单元,采用第K种所述排列方式中的第N个所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
结合第一方面以及第一方面的第一至第四种可能实现方式,在第五种可能实现方式中,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
本发明实施例第二方面提供了一种数据流的接收方法,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述方法包括:
接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所 有用于发送数据的所述发送天线的总数;
根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
接收所述发送端设备发送的所述数据流中数据帧的数据部分;
根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
在第二方面的第一种可能实现方式中,所述接收所述发送端设备发送的所述数据流中数据帧的数据部分,包括:
在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分;
所述根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息,包括:
根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
结合第二方面以及第二方面的第一种可能实现方式,在第二种可能实现方式中,所述根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息之后,还包括:
从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式;
将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
结合第二方面以及第二方面的第一或第二种可能实现方式,在第三种可能实现方式中,所述在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分,包括:
在序号为N的所述发送周期,通过一个所述资源单元,接收所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,所述M为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序;
所述根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息,包括:
根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
结合第二方面以及第二方面的第一或第二种可能实现方式,在第四种可能实现方式中,所述在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分,包括:
在序号为N的所述发送周期,通过第K个所述资源单元,接收所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,M种所述发送天线的组合方式有J种排列方式,所述M和所述J为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数;
所述根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息,包括:
根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
结合第二方面以及第二方面的第一至第四种可能实现方式,在第五种可能实现方式中,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
本发明实施例第三方面提供了一种发送端设备,所述发送端设备应用于采 用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个所述发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述发送端设备包括:
帧头部分发送模块,用于向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有用于发送数据流的所述发送端设备的所有发送天线的总数;
数据部分发送模块,用于向所述接收端设备发送所述数据流中数据帧的数据部分。
在第三方面的第一种可能实现方式中,所述数据部分发送模块,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合,包括:
天线组合获取单元,用于获取至少一种所述发送天线的组合方式;
资源单元获取单元,用于确定至少一个资源单元,所述资源单元由时域资源和频域资源组成;
数据部分发送单元,用于在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
结合第三方面以及第三方面的第一种可能实现方式,在第二种可能实现方式中,所述天线组合获取单元,具体用于接收所述接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
结合第三方面以及第三方面的第一或第二种可能实现方式,在第三种可能实现方式中,所述天线组合获取单元,用于获取M种所述发送天线的组合方式,其中,所述M为自然数;
所述数据部分发送单元,具体用于在序号为N的所述发送周期,通过一个所述资源单元,采用第N种所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
结合第三方面以及第三方面的第一或第二种可能实现方式,在第四种可能实现方式中,所述天线组合获取单元,用于获取M种所述发送天线的组合方式,以及获取M种所述发送天线的组合方式的J种排列方式,其中,所述M和所述J为自然数;
所述数据部分发送单元,具体用于在序号为N的所述发送周期,通过第K个所述资源单元,采用第K种所述排列方式中的第N个所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
结合第三方面以及第三方面的第一至第四种可能实现方式,在第五种可能实现方式中,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
本发明实施例第四方面提供了一种接收端设备,所述接收端设备应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括所述接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述接收端设备包括:
帧头部分接收模块,用于接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有用于发送数据的所述发送端设备的所有发送天线的总数;
信道信息获取模块,用于根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
数据部分接收模块,用于接收所述发送端设备发送的所述数据流中数据帧的数据部分;
数据信息获取模块,用于根据所述信道信息对所述数据帧的数据部分进行 信号检测以获取所述数据部分的数据信息;
数据信息获取模块,具体用于根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
在第四方面的第一种可能实现方式中,所述数据部分接收模块,具体用于在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分。
结合第四方面以及第四方面的第一种可能实现方式,在第二种可能实现方式中,所述接收端设备还包括:
天线组合选择模块,用于根据所述导频信号检测各个所述发送天线所用的信道,从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式;
天线组合反馈模块,用于将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
结合第四方面以及第四方面的第一或第二种可能实现方式,在第三种可能实现方式中,所述数据部分接收模块,具体用于在序号为N的所述发送周期,通过一个所述资源单元,接收所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,所述M为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序;
所述数据信息获取模块,具体用于根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
结合第四方面以及第四方面的第一或第二种可能实现方式,在第四种可能实现方式中,所述数据部分接收模块,具体用于在序号为N的所述发送周期,通过第K个所述资源单元,接收所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,M种所述发送天线的组合方式有J种排列方式,所述M和所述J为自然数,所述N为不大于M的自然数,所述发送周期的序号以 1至M的顺序循环排序,所述K为不大于J的自然数;
所述数据信息获取模块,具体用于根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
结合第四方面以及第四方面的第一至第四种可能实现方式,在第五种可能实现方式中,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
本发明实施例第五方面提供了一种无线通信系统,所述无线通信系统包括第三方面提供的发送端设备,和第四方面提供的接收端设备。
本发明实施例第六方面提供了一种计算机存储介质,所述计算机存储介质存储有程序,该程序执行时包括第一方面提供的一种数据流的发送方法的部分或全部步骤。
本发明实施例第七方面提供了一种计算机存储介质,所述计算机存储介质存储有程序,该程序执行时包括第二方面提供的一种数据流的接收方法的部分或全部步骤。
本发明实施例第八方面提供了一种发送端设备,包括:天线接口、存储器以及处理器,其中,存储器中存储一组程序,且处理器用于调用存储器中存储的程序,用于执行以下操作:
向所述接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于所述发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数;
向所述接收端设备发送所述数据流中数据帧的数据部分。
本发明实施例第九方面提供了一种接收端设备,包括:天线接口、存储器以及处理器,其中,存储器中存储一组程序,且处理器用于调用存储器中存储的程序,用于执行以下操作:
接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据的所述发送天线的总数;
根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
接收所述发送端设备发送的所述数据流中数据帧的数据部分;
根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
由上可见,本发明实施例中的发送端设备先向接收端设备发送数据流中数据帧的帧头部分,帧头部分携带有指定数量的导频信号,其中指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,原因在于本发明实施例将会对发送的数据流中数据帧的数据部分进行分集,故数据部分包括发送端设备组中所有发送端设备的发送天线所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有发送天线对应的信道信息;然后发送端设备再向接收端设备发送数据流中数据帧的数据部分,其中数据部分已作分集,可以实现提高WiFi的传输增益。
附图说明
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是本发明实施例提供的一种WiFi标准中数据帧的结构示意图;
图2是本发明实施例提供的一种多用户MIMO技术的场景示意图;
图3是本发明实施例提供的一种信道划分的示意图;
图4是本发明实施例提供的一种OFDM数据部分的结构示意图;
图5是本发明实施例提供的一种数据流的发送方法的流程示意图
图6是本发明实施例提供的另一种数据流的发送方法的流程示意图;
图7是本发明实施例提供的一种数据流的传输方法的流程示意图;
图8是本发明实施例提供的另一种数据流的传输方法的流程示意图;
图9是本发明实施例提供的一种发送端设备的结构示意图;
图10是本发明实施例提供的一种数据部分发送模块的结构示意图;
图11是本发明实施例提供的一种接收端设备的结构示意图;
图12是本发明实施例提供的一种数据流的无线通信系统的结构示意图;
图13是本发明实施例提供的另一种发送端设备的结构示意图;
图14是本发明实施例提供的另一种接收端设备的结构示意图;
图15是本发明实施例提供的一种数据流传输的场景示意图;
图16是本发明实施例提供的一种时间分集方式的示意图;
图17是本发明实施例提供的一种时间和频率分集方式的示意图;
图18是本发明实施例提供的另一种时间分集方式的示意图;
图19是本发明实施例提供的另一种时间和频率分集方式的示意图;
图20是本发明实施例提供的一种时分方式的导频子载波的示意图;
图21是本发明实施例提供的一种频分方式的导频子载波的示意图;
图22是本发明实施例提供的一种基于正交矩阵码分的导频子载波的示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有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。
应理解,本发明实施例的技术方案尤其应用于WiFi系统,但不限于WiFi系统,还可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,简称为“GSM”)系统、码分多址(Code Division Multiple Access,简称为“CDMA”)系统、宽带码分多址(Wideband Code Division  Multiple Access,简称为“WCDMA”)系统、通用分组无线业务(General Packet Radio Service,简称为“GPRS”)、长期演进(Long Term Evolution,简称为“LTE”)系统、LTE频分双工(Frequency Division Duplex,简称为“FDD”)系统、LTE时分双工(Time Division Duplex,简称为“TDD”)、通用移动通信系统(Universal Mobile Telecommunication System,简称为“UMTS”)或全球互联微波接入(Worldwide Interoperability for Microwave Access,简称为“WiMAX”)通信系统等。
还应理解,在本发明实施例中,发送端设备组是指为实现传输任务而处于工作状态的一组发送端设备,发送端设备可以是智能手机、平板电脑、台式电脑、笔记本电脑、手持游戏机、数字音视频播放器或电子阅读器等用户设备,发送端设备应包括至少一个发送天线,用于向接收端设备发送消息。另外,在本发明实施例中,接收端设备可以是无线路由器等交换设备,接收端设备应包括多个发送天线,用于接收发送端设备发送的消息。
为了便于理解,先介绍一下WiFi标准中的数据帧结构。其中WiFi标准历经802.11a、802.11b、802.11d、802.11n和802.11ac等各个版本,以802.11a为例,请参阅图1所示的WiFi标准中数据帧的结构示意图,数据帧分为帧头、数据部分和帧尾。一般地,帧头携带有导频信号,承载于LTF(Long Training Field)中,其中,导频信号用于信道估计,即接收端设备可根据导频信号检测信道,具体实现方式这里不再赘述。数据部分,即Data Field,用于承载数据消息。帧尾用于填充尾比特,使数据帧能够填满整数倍的OFDM符号。
然后,介绍一下多用户MIMO技术。以简单的2*2MIMO为例,请参阅图2所示的多用户MIMO技术的场景示意图,假设发送端设备组中的发送端设备(即STA1和STA2)各有1个天线,接收端设备(即AP)有两根天线,STA 1和STA2同时发送信号S1和S2给AP,AP接收到的信号R可以如公式(1)所示。其中,
Figure PCTCN2014093586-appb-000001
h11和h21为STA1到AP第一个和第二个天线的信道,h12和h22为STA2到AP第一个和第二个天线的信道,AP采用相应的检测算法,进行信号检测处理,可 获取信号S1和S2的信息。如以采用迫零检测算法为例,S1和S2对应的估值可以采用如下公式(2)求得:
Figure PCTCN2014093586-appb-000002
其中[]-1表示矩阵求逆。由此可见,WiFi系统采用了多用户MIMO技术,原来分两次传输的消息可以一次传完,从而极大地提升了传输效率和吞吐量。需要指出的是,AP为了实现对STA1和STA2分别到AP的两个数据流进行解调,需要检测两个发送天线所用的信道,具体实现过程中:在STA1发送的数据流中携带用于检测STA1的发送天线所用的信道的导频信号,在STA2发送的数据流中携带用于检测STA2的发送天线所用的信道的导频信号。
接着,介绍一下多信道技术。请参阅图3所示的信道划分的示意图,若将WiFi系统带宽为2.4GHz的信道划分为14个子信道,每个子信道分配22MHz的带宽,传统技术是给每个发送端设备分配一个子信道,而多信道技术则给每个发送端设备同时分配多个子信道,例如:给每个发送端设备同时分配相邻的两个子信道,使其带宽可以达到44Mhz,提高了传输速率。
最后,介绍一下OFDM技术。请参阅图4所示的OFDM数据部分的结构示意图,现有WiFi标准中,数据部分上所有的子载波(除了用于估计相位旋转的导频子载波)都分配给了一个发送端设备,而引入OFDM技术后的WiFi标准,将数据部分上不同子载波组(即一组子载波)分配给不同的发射极,增大了频谱利用率。需要指出的是,为了简化,图4中没有画出导频子载波和0中频。
应说明的是,本发明实施例是针对WiFi在多用户MIMO技术上,引入多信道技术和OFDM技术的情景,提出的对传输信号进行时间分集和/或频率分集的实施方法,具体实施方法参阅下文。
图5是本发明实施例中一种数据流的发送方法的流程示意图。本实施例中的数据流的发送方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数 小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,如图所示本实施例中的数据流的发送方法的流程可以包括:
S101,向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数。
其中,所述指定数量的导频信号用于信道估计以获取发送端设备组中所有发送端设备的所有用于发送数据流的发送天线对应的信道信息。发送端设备发送所有发送天线的导频信号的原因在于,本发明实施例后续步骤将会对发送的数据流中数据帧的数据部分进行分集,分集后的数据部分包括发送端设备组中所有发送端设备的不同发送天线组合所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有发送天线对应的信道信息,另外,接收端设备获取发送天线对应的信道信息的目的前文已作介绍,这里不再赘述。需要指出的是,本发明实施例中数据帧的帧头部分携带导频信号的方式,是较现有标准的一个区别技术特征,例如,假设有m个用于传输数据流的发送天线,以及有n(n<m)个向接收端设备传输的数据流,现有标准中,只在数据流中数据帧的帧头部分携带n个发送天线的导频信号,而本方案为了达到最优的分集或选择效果,要求在数据帧的帧头部分携带m个发送天线的导频信号。
还需指出的是,本发明实施例中发送的导频信号较现有标准中导频信号也是有区别的,现有标准中导频信号是不能区分发自于哪个发送天线,只能区分发自于哪个逻辑端口,而本发明实施例中发送的导频信号具有以下两个特点:
第一,各个导频信号之间是彼此无干扰的,接收端设备能根据每个发送天线对应的导频信号检测出该发送天线的信道。
第二,导频信号的发送方式包括时分、频分和基于正交矩阵码分等。
具体实现过程中,首先介绍下时分和频分的发送方式。以OFDM系统为例,时分的导频信号对应不同发送天线的导频信号占用不同的符号,频分的导频信号对应不同发送天线的导频信号占用不同的子载波。以2个发送天线为例,请参阅图20,在时分方式中,第一个符号上所有的子载波都传输第一个天线的导频信号(如图白色的方块),第二个符号上所有的子载波都传输第二 个发送天线的导频信号(如图灰色的方块);请参阅图21,在频分方式中,第一个发送天线的导频信号(如图白色的方块)和第二个发送天线的导频信号(如图灰色的方块)分别占用不同的子载波。
然后介绍下基于正交矩阵码分的发送方式。以发送2个数据流为例,请参阅图22,图22(A)中一个LTF符号代表一个OFDM符号,图22(B)中一个OFDM符号在频域上由若干个子载波构成。那么,接收端设备的一个天线接收的第一个和第二个LTF符号上,第k个子载波上的信号如公式(3)所示,
Figure PCTCN2014093586-appb-000003
其中,r1,k为接收天线在第1个符号,第k个子载波上接收到的信号,r2,k为接收天线在第2个符号,第k个子载波上接收到的信号;h1,k为第1个数据流在第k个子载波上的信道,h2,k为第2个数据流在第k个子载波上的信道,利用连续2个符号时间内信道基本不变的特性;p为导频常数,后续为了方便描述,我们将p略去不提,并不影响本发明的具体内容,n1,k为接收天线在第1个符号及第k个子载波上的噪声信号,n2,k为接收天线在第2个符号及第k个子载波上的噪声信号。进一步地,利用LTF进行信道估计可通过公式(4)实现。
Figure PCTCN2014093586-appb-000004
其中,inv()表示矩阵求逆。
S102,向所述接收端设备发送所述数据流中数据帧的数据部分。
为了便于理解,本发明实施例以图15所示的数据流传输场景为例进行介绍。请参阅图15,发送端设备组包括STA1和STA2两个发送端设备,每个发送端设备上有两个发送天线,接收端设备为AP。
具体的,发送端设备执行“向接收端设备发送数据流中数据帧的数据部分”的操作,采用了分集的发送方式以获得更多增益,具体实现方式可通过以下步骤实现:
步骤1,获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合。
具体实现过程中,发送端设备获取至少一种发送天线的组合方式可通过以 下描述的方式一或方式二实现。
方式一,发送端设备将属于不同的发送端设备的多个发送天线设定为一种发送天线的组合方式,以此获取至少一种发送天线的组合方式。
例如,请参阅图15,属于不同的发送端设备的多个发送天线的存在如表1所示的4种组合方式,即发送端设备获取到4种发送天线的组合方式。
表1
组合方式1 (发送天线1,发送天线3)
组合方式2 (发送天线1,发送天线4)
组合方式3 (发送天线2,发送天线3)
组合方式4 (发送天线2,发送天线4)
方式二,发送端设备接收接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
其中,不同的发送天线的组合方式在相同的信道上会有不同的增益,为了获得最佳增益,可以先由接收端设备根据信道质量选出高增益的发送天线的组合方式并反馈给发送端设备,发送端设备再将接收端设备反馈的发送天线的组合方式作为后续使用的发送天线的组合方式。另外,所述预设要求可以是信道增益最佳的一个或多个发送天线的组合方式。
步骤2,确定至少一个资源单元,所述资源单元由时域资源和频域资源组成。
具体实现过程中,发送端设备在传输资源上确定至少一个资源单元,需要指出的是,接收端设备确定的资源单元应与发送端设备保持一致以保证收发对应。
进一步可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。其中,资源单元在频域上的组成方式,可理解为,若采用多信道技术,则由一个或多个信道组成;若采用OFDM技术,则由一组子载波组成。
步骤3,在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
一方面,发送端设备在获取发送天线的组合方式时,采用了步骤1中的方式一,即将属于不同的发送端设备的多个发送天线设定为一种发送天线的组合方式,以此获取至少一种发送天线的组合方式。
作为一种可选的实施方式,假设发送端设备获取到M种发送天线的组合方式,其中,所述M为自然数。那么,发送端设备在序号为N的发送周期,通过一个资源单元,采用第N种发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序。
例如,请参阅图15和表1,发送端设备可获取到4种不同的发送天线的组合方式,可设置4个不同的发送周期。具体实现过程中,请参阅图16所示的时间分集方式的示意图,即发送端设备,
在序号为1的发送周期,在一个资源单元上,采用组合方式1,发送数据部分;
在序号为2的发送周期,在一个资源单元上,采用组合方式2,发送数据部分;
在序号为3的发送周期,在一个资源单元上,采用组合方式3,发送数据部分;
在序号为4的发送周期,在一个资源单元上,采用组合方式4,发送数据部分;
然后以此循环发送,直至消息传输完毕。
作为另一种可选的实施方式,假设发送端设备获取到M种发送天线的组合方式,以及获取到M种发送天线的组合方式的J种排列方式,其中,M和J为自然数。那么,发送端设备在序号为N的发送周期,通过第K个资源单元,采用第K种所述排列方式中的第N个发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序,K为不大于J的自然数。
例如,请参阅图15和表1,发送端设备可获取到4种不同的发送天线的组合方式,根据这4种发送天线的组合方式可得到12种排列方式,以及可设 置4个不同的发送周期,确定0至12个资源单元。具体实现过程中,请参阅图17所示的时间和频率分集方式的示意图,为了便于理解,该示例只确定2个资源单元,只选用2种排列方式,即“组合方式1,组合方式2,组合方式3,组合方式4”和“组合方式4,组合方式3,组合方式2,组合方式1”的2种排列方式,那么发送端设备,
在序号为1的发送周期,在资源单元1上,采用组合方式1,发送数据部分,在资源单元2上,采用组合方式4,发送数据部分;
在序号为2的发送周期,在资源单元1上,采用组合方式2,发送数据部分,在资源单元2上,采用组合方式3,发送数据部分;
在序号为3的发送周期,在资源单元1上,采用组合方式3,发送数据部分,在资源单元2上,采用组合方式2,发送数据部分;
在序号为4的发送周期,在资源单元1上,采用组合方式4,发送数据部分,在资源单元2上,采用组合方式1,发送数据部分;
然后以此循环发送,直至消息传输完毕。
另一方面,发送端设备在获取发送天线的组合方式时,采用了步骤1中的方式二,即发送端设备接收接收端设备反馈的发送天线的组合方式。
具体实现过程中,发送端设备只需采用反馈的发送天线的组合方式,发送数据流中数据帧的数据部分。同理,发送端设备可类比上述两种可选的实施方式发送数据部分。
例如,请参阅图18所示的时间分集方式的示意图,假设组合方式1为接收端设备反馈的发送天线的组合方式,那么发送端设备,
在每个发送周期,在一个资源单元上,采用组合方式1,发送数据部分。直至消息传输完毕。
又如,请参阅图19所示的时间和频率分集方式的示意图,假设组合方式1和组合方式3为接收端设备反馈的发送天线的组合方式,那么发送端设备,
在序号为1的发送周期,在资源单元1上,采用组合方式1,发送数据部分,在资源单元2上,采用组合方式3,发送数据部分;
在序号为2的发送周期,在资源单元1上,采用组合方式3,发送数据部分,在资源单元2上,采用组合方式1,发送数据部分;
然后以此循环发送,直至消息传输完毕。
由上可见,本发明实施例中的发送端设备先向接收端设备发送数据流中数据帧的帧头部分,帧头部分携带有指定数量的导频信号,其中指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,原因在于本发明实施例将会对发送的数据流中数据帧的数据部分进行分集,故数据部分包括发送端设备组中所有发送端设备的发送天线所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有发送天线对应的信道信息;然后发送端设备再向接收端设备发送数据流中数据帧的数据部分,其中数据部分已作分集,可以实现提高WiFi的传输增益。
图6是本发明实施例中另一种数据流的发送方法的流程示意图,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,可以包括:
S201,向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数。
需要指出的是,本发明实施例中数据帧的帧头部分携带导频信号的方式,是较现有标准的一个区别技术特征,例如,假设有m个用于传输数据流的发送天线,以及有n(n<m)个向接收端设备传输的数据流,现有标准中,只在数据流中数据帧的帧头部分携带n个发送天线的导频信号,而本方案为了达到最优的分集或选择效果,要求在数据帧的帧头部分携带m个发送天线的导频信号。
S202,获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合。
为了便于理解,本发明实施例以图15所示的数据流传输场景为例进行介绍。请参阅图15,发送端设备组包括STA1和STA2两个发送端设备,每个发送端设备上有两个发送天线,接收端设备为AP。
例如,请参阅图15,属于不同的发送端设备的多个发送天线的存在如表1所示的4种组合方式,即发送端设备获取到4种发送天线的组合方式。
S203,确定至少一个资源单元,所述资源单元由时域资源和频域资源组成。
具体实现过程中,发送端设备在传输资源上确定至少一个资源单元,需要指出的是,接收端设备确定的资源单元应与发送端设备保持一致以保证收发对应。
进一步可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。其中,资源单元在频域上的组成方式,可理解为,若采用多信道技术,则由一个或多个信道组成;若采用OFDM技术,则由一组子载波组成。
S204,在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
作为一种可选的实施方式,假设发送端设备获取到M种发送天线的组合方式,其中,所述M为自然数。那么,发送端设备在序号为N的发送周期,通过一个资源单元,采用第N种发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序。
例如,请参阅图15和表1,发送端设备可获取到4种不同的发送天线的组合方式,可设置4个不同的发送周期。具体实现过程中,请参阅图16所示的时间分集方式的示意图,即发送端设备,
在序号为1的发送周期,在一个资源单元上,采用组合方式1,发送数据部分;
在序号为2的发送周期,在一个资源单元上,采用组合方式2,发送数据部分;
在序号为3的发送周期,在一个资源单元上,采用组合方式3,发送数据部分;
在序号为4的发送周期,在一个资源单元上,采用组合方式4,发送数据部分;
然后以此循环发送,直至消息传输完毕。
作为另一种可选的实施方式,假设发送端设备获取到M种发送天线的组合方式,以及获取到M种发送天线的组合方式的J种排列方式,其中,M和J为自然数。那么,发送端设备在序号为N的发送周期,通过第K个资源单元,采用第K种所述排列方式中的第N个发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序,K为不大于J的自然数。
例如,请参阅图15和表1,发送端设备可获取到4种不同的发送天线的组合方式,根据这4种发送天线的组合方式可得到12种排列方式,以及可设置4个不同的发送周期,确定0至12个资源单元。具体实现过程中,请参阅图17所示的时间和频率分集方式的示意图,为了便于理解,该示例只确定2个资源单元,只选用2种排列方式,即“组合方式1,组合方式2,组合方式3,组合方式4”和“组合方式4,组合方式3,组合方式2,组合方式1”的2种排列方式,那么发送端设备,
在序号为1的发送周期,在资源单元1上,采用组合方式1,发送数据部分,在资源单元2上,采用组合方式4,发送数据部分;
在序号为2的发送周期,在资源单元1上,采用组合方式2,发送数据部分,在资源单元2上,采用组合方式3,发送数据部分;
在序号为3的发送周期,在资源单元1上,采用组合方式3,发送数据部分,在资源单元2上,采用组合方式2,发送数据部分;
在序号为4的发送周期,在资源单元1上,采用组合方式4,发送数据部分,在资源单元2上,采用组合方式1,发送数据部分;
然后以此循环发送,直至消息传输完毕。
由上可见,本发明实施例中的发送端设备先向接收端设备发送数据流中数据帧的帧头部分,帧头部分携带有指定数量的导频信号,其中指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,原因在于本发明实施例将会对发送的数据流中数据帧的数据部分进行分集,故数据部分包括发送端设备组中所有发送端设备的发送天线所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有 发送天线对应的信道信息;然后发送端设备再向接收端设备发送数据流中数据帧的数据部分,其中数据部分已作分集,可以实现提高WiFi的传输增益。
图7是本发明实施例中一种数据流的传输方法的流程示意图,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,可以包括:
S301,发送端设备向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数。
需要指出的是,本发明实施例中数据帧的帧头部分携带导频信号的方式,是较现有标准的一个区别技术特征,例如,假设有m个用于传输数据流的发送天线,以及有n(n<m)个向接收端设备传输的数据流,现有标准中,只在数据流中数据帧的帧头部分携带n个发送天线的导频信号,而本方案为了达到最优的分集或选择效果,要求在数据帧的帧头部分携带m个发送天线的导频信号。
S302,接收端设备接收发送端设备发送的数据流中数据帧的帧头部分。
S303,接收端设备根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息。
可选的,接收端设备从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式,将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
S304,发送端设备向所述接收端设备发送所述数据流中数据帧的数据部分。
为了便于理解,本发明实施例以图15所示的数据流传输场景为例进行介绍。请参阅图15,发送端设备组包括STA1和STA2两个发送端设备,每个发送端设备上有两个发送天线,接收端设备为AP。
具体的,发送端设备执行“向接收端设备发送数据流中数据帧的数据部分”的操作,采用了分集的发送方式以获得更多增益,具体实现方式可通过以下步骤实现:
步骤1,获取至少一种所述发送天线的组合方式。
具体实现过程中,发送端设备获取至少一种发送天线的组合方式可通过以下描述的方式一或方式二实现。
方式一,发送端设备将属于不同的发送端设备的多个发送天线设定为一种发送天线的组合方式,以此获取至少一种发送天线的组合方式。
例如,请参阅图15,属于不同的发送端设备的多个发送天线的存在如表1所示的4种组合方式,即发送端设备获取到4种发送天线的组合方式。
方式二,发送端设备接收接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由接收端设备根据导频信号检测各个发送天线所用的信道后,选出的质量符合预设要求的一种或多种发送天线的组合方式。
其中,不同的发送天线的组合方式在相同的信道上会有不同的增益,为了获得最佳增益,可以先由接收端设备根据信道质量选出高增益的发送天线的组合方式并反馈给发送端设备,发送端设备再将接收端设备反馈的发送天线的组合方式作为后续使用的发送天线的组合方式。另外,所述预设要求可以是信道增益最佳的一个或多个发送天线的组合方式。
步骤2,确定至少一个资源单元,所述资源单元由时域资源和频域资源组成。
具体实现过程中,发送端设备在传输资源上确定至少一个资源单元,需要指出的是,接收端设备确定的资源单元应与发送端设备保持一致以保证收发对应。
进一步可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。其中,资源单元在频域上的组成方式,可理解为,若采用多信道技术,则由一个或多个信道组成;若采用OFDM技术,则由一组子载波组成。
步骤3,在各个预设的发送周期,通过所述资源单元,采用指定的所述发 送天线的组合方式,向所述接收端设备发送所述数据部分。
一方面,发送端设备在获取发送天线的组合方式时,采用了步骤1中的方式一,即将属于不同的发送端设备的多个发送天线设定为一种发送天线的组合方式,以此获取至少一种发送天线的组合方式。
作为一种可选的实施方式,假设发送端设备获取到M种发送天线的组合方式,其中,所述M为自然数。那么,发送端设备在序号为N的发送周期,通过一个资源单元,采用第N种发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序。
作为另一种可选的实施方式,假设发送端设备获取到M种发送天线的组合方式,以及获取到M种发送天线的组合方式的J种排列方式,其中,M和J为自然数。那么,发送端设备在序号为N的发送周期,通过第K个资源单元,采用第K种所述排列方式中的第N个发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序,K为不大于J的自然数。
另一方面,发送端设备在获取发送天线的组合方式时,采用了步骤1中的方式二,即发送端设备接收接收端设备反馈的发送天线的组合方式。
具体实现过程中,发送端设备只需采用反馈的发送天线的组合方式,发送数据流中数据帧的数据部分。同理,发送端设备可类比上述两种可选的实施方式发送数据部分。
S305,接收端设备接收所述发送端设备发送的所述数据流中数据帧的数据部分。
具体的,接收端设备在各个预设的发送周期,通过至少一个资源单元,采用指定的至少一种发送天线的组合方式,接收所述发送端设备发送的所述数据部分。
需要指出的是,发送端设备发送数据流中数据帧的数据部分方式如S304介绍的有多种,接收端设备只需在每种方式下,到对应的发送周期和对应的资源单元,接收发送端设备采用对应的发送天线的组合方式发送的数据部分即可,至于每种具体的接收方式,这里不再一一赘述。
S306,接收端设备根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
具体的,接收端设备根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
作为一个可选的示例,对应图16所示的方案,接收端设备根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
作为另一个可选的示例,对应图17所示的方案,接收端设备根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
由上可见,本发明实施例中的发送端设备先向接收端设备发送数据流中数据帧的帧头部分,帧头部分携带有指定数量的导频信号,其中指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,原因在于本发明实施例将会对发送的数据流中数据帧的数据部分进行分集,故数据部分包括发送端设备组中所有发送端设备的发送天线所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有发送天线对应的信道信息;然后发送端设备再向接收端设备发送数据流中数据帧的数据部分,其中数据部分已作分集,可以实现提高WiFi的传输增益。
图8是本发明实施例中另一种数据流的传输方法的流程示意图,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,可以包括:
S401,发送端设备向接收端设备发送数据流中数据帧的帧头部分,所述帧 头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数。
需要指出的是,本发明实施例中数据帧的帧头部分携带导频信号的方式,是较现有标准的一个区别技术特征,例如,假设有m个用于传输数据流的发送天线,以及有n(n<m)个向接收端设备传输的数据流,现有标准中,只在数据流中数据帧的帧头部分携带n个发送天线的导频信号,而本方案为了达到最优的分集或选择效果,要求在数据帧的帧头部分携带m个发送天线的导频信号。
S402,接收端设备接收发送端设备发送的数据流中数据帧的帧头部分。
S403,接收端设备根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息。
具体的,接收端设备在接收到发送端设备发送的数据流中数据帧的帧头部分后,根据导频信号检测发送端设备组中所有发送端设备的发送天线所用的信道。
S404,接收端设备从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
需要指出的是,不同的发送天线的组合方式在相同的信道上会有不同的增益,所述预设要求可以是信道增益最佳的一个或多个发送天线的组合方式。
S405,接收端设备将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
S406,发送端设备接收所述接收端设备反馈的发送天线的组合方式。
S407,发送端设备确定至少一个资源单元,所述资源单元由时域资源和频域资源组成。
具体的,发送端设备在传输资源上确定至少一个资源单元,需要指出的是,接收端设备确定的资源单元应与发送端设备保持一致以保证收发对应。
进一步可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。其中,资源单元在频域上的组成方式,可理解为,若 采用多信道技术,则由一个或多个信道组成;若采用OFDM技术,则由一组子载波组成。
S408,发送端设备在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
具体的,发送端设备采用反馈的发送天线的组合方式,发送数据流中数据帧的数据部分。同理,发送端设备可类比图7步骤S304中两种可选的实施方式发送数据部分。
S409,接收端设备接收所述发送端设备发送的所述数据流中数据帧的数据部分。
具体的,接收端设备在各个预设的发送周期,通过至少一个资源单元,采用指定的至少一种发送天线的组合方式,接收所述发送端设备发送的所述数据部分。
S410,接收端设备根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
具体的,接收端设备根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
作为一个可选的示例,对应图16所示的方案,接收端设备根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
作为另一个可选的示例,对应图17所示的方案,接收端设备根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
由上可见,本发明实施例中的发送端设备先向接收端设备发送数据流中数据帧的帧头部分,帧头部分携带有指定数量的导频信号,其中指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,原因 在于本发明实施例将会对发送的数据流中数据帧的数据部分进行分集,故数据部分包括发送端设备组中所有发送端设备的发送天线所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有发送天线对应的信道信息;然后发送端设备再向接收端设备发送数据流中数据帧的数据部分,其中数据部分已作分集,可以实现提高WiFi的传输增益。
图9是本发明实施例中一种发送端设备的结构示意图。所述发送端设备应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个所述发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,如图所示本发明实施例中的发送端设备至少可以包括帧头部分发送模块510和数据部分发送模块520,其中:
帧头部分发送模块510,用于向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数。
需要指出的是,本发明实施例中数据帧的帧头部分携带导频信号的方式,是较现有标准的一个区别技术特征,例如,假设有m个用于传输数据流的发送天线,以及有n(n<m)个向接收端设备传输的数据流,现有标准中,只在数据流中数据帧的帧头部分携带n个发送天线的导频信号,而本方案为了达到最优的分集或选择效果,要求在数据帧的帧头部分携带m个发送天线的导频信号。
数据部分发送模块520,用于向所述接收端设备发送所述数据流中数据帧的数据部分。具体实现中,数据部分发送模块520可以如图10所示进一步包括天线组合获取单元521、资源单元获取单元522以及数据部分发送单元523,其中:
天线组合获取单元521,用于获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合。
为了便于理解,本发明实施例以图15所示的数据流传输场景为例进行介绍。请参阅图15,发送端设备组包括STA1和STA2两个发送端设备,每个发送端设备上有两个发送天线,接收端设备为AP。
具体的,天线组合获取单元521获取至少一种发送天线的组合方式可通过以下描述的方式一或方式二实现。
方式一,天线组合获取单元521将属于不同的发送端设备的多个发送天线设定为一种发送天线的组合方式,以此获取至少一种发送天线的组合方式。
例如,请参阅图15,属于不同的发送端设备的多个发送天线的存在如表1所示的4种组合方式,即发送端设备获取到4种发送天线的组合方式。
方式二,天线组合获取单元521接收接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
其中,不同的发送天线的组合方式在相同的信道上会有不同的增益,为了获得最佳增益,可以先由接收端设备根据信道质量选出高增益的发送天线的组合方式并反馈给天线组合获取单元521,天线组合获取单元521再将接收端设备反馈的发送天线的组合方式作为后续使用的发送天线的组合方式。另外,所述预设要求可以是信道增益最佳的一个或多个发送天线的组合方式。
资源单元获取单元522,用于确定至少一个资源单元,所述资源单元由时域资源和频域资源组成。
具体的,资源单元获取单元522在传输资源上确定至少一个资源单元,需要指出的是,接收端设备确定的资源单元应与发送端设备保持一致以保证收发对应。
进一步可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。其中,资源单元在频域上的组成方式,可理解为,若采用多信道技术,则由一个或多个信道组成;若采用OFDM技术,则由一组子载波组成。
数据部分发送单元523,用于在各个预设的发送周期,通过所述资源单元, 采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
一方面,天线组合获取单元521在获取发送天线的组合方式时,采用了步骤1中的方式一,即将属于不同的发送端设备的多个发送天线设定为一种发送天线的组合方式,以此获取至少一种发送天线的组合方式。
作为一种可选的实施方式,假设天线组合获取单元521获取到M种发送天线的组合方式,其中,所述M为自然数。那么,数据部分发送单元523在序号为N的发送周期,通过一个资源单元,采用第N种发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序。
例如,请参阅图15和表1,天线组合获取单元521可获取到4种不同的发送天线的组合方式,可设置4个不同的发送周期。具体实现过程中,请参阅图16所示的时间分集方式的示意图,即数据部分发送单元523,
在序号为1的发送周期,在一个资源单元上,采用组合方式1,发送数据部分;
在序号为2的发送周期,在一个资源单元上,采用组合方式2,发送数据部分;
在序号为3的发送周期,在一个资源单元上,采用组合方式3,发送数据部分;
在序号为4的发送周期,在一个资源单元上,采用组合方式4,发送数据部分;
然后以此循环发送,直至消息传输完毕。
作为另一种可选的实施方式,假设天线组合获取单元521获取到M种发送天线的组合方式,以及获取到M种发送天线的组合方式的J种排列方式,其中,M和J为自然数。那么,数据部分发送单元523在序号为N的发送周期,通过第K个资源单元,采用第K种所述排列方式中的第N个发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序,K为不大于J的自然数。
例如,请参阅图15和表1,天线组合获取单元521可获取到4种不同的发送天线的组合方式,根据这4种发送天线的组合方式可得到12种排列方式,以及可设置4个不同的发送周期,确定0至12个资源单元。具体实现过程中, 请参阅图17所示的时间和频率分集方式的示意图,为了便于理解,该示例只确定2个资源单元,只选用2种排列方式,即“组合方式1,组合方式2,组合方式3,组合方式4”和“组合方式4,组合方式3,组合方式2,组合方式1”的2种排列方式,那么数据部分发送单元523,
在序号为1的发送周期,在资源单元1上,采用组合方式1,发送数据部分,在资源单元2上,采用组合方式4,发送数据部分;
在序号为2的发送周期,在资源单元1上,采用组合方式2,发送数据部分,在资源单元2上,采用组合方式3,发送数据部分;
在序号为3的发送周期,在资源单元1上,采用组合方式3,发送数据部分,在资源单元2上,采用组合方式2,发送数据部分;
在序号为4的发送周期,在资源单元1上,采用组合方式4,发送数据部分,在资源单元2上,采用组合方式1,发送数据部分;
然后以此循环发送,直至消息传输完毕。
另一方面,天线组合获取单元521在获取发送天线的组合方式时,采用了步骤1中的方式二,即天线组合获取单元521接收接收端设备反馈的发送天线的组合方式。
具体实现过程中,数据部分发送单元523只需采用反馈的发送天线的组合方式,发送数据流中数据帧的数据部分。同理,数据部分发送单元523可类比上述两种可选的实施方式发送数据部分。
例如,请参阅图18所示的时间分集方式的示意图,假设组合方式1为接收端设备反馈的发送天线的组合方式,那么数据部分发送单元523,
在每个发送周期,在一个资源单元上,采用组合方式1,发送数据部分。直至消息传输完毕。
又如,请参阅图19所示的时间和频率分集方式的示意图,假设组合方式1和组合方式3为接收端设备反馈的发送天线的组合方式,那么数据部分发送单元523,
在序号为1的发送周期,在资源单元1上,采用组合方式1,发送数据部分,在资源单元2上,采用组合方式3,发送数据部分;
在序号为2的发送周期,在资源单元1上,采用组合方式3,发送数据部 分,在资源单元2上,采用组合方式1,发送数据部分;
然后以此循环发送,直至消息传输完毕。
图11是本发明实施例中一种接收端设备的结构示意图。所述接收端设备应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括所述接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,如图所示本发明实施例中的接收端设备至少可以包括帧头部分接收模块610、信道信息获取模块620、数据部分接收模块630以及数据信息获取模块640,其中:
帧头部分接收模块610,用于接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据的所述发送天线的总数。
需要指出的是,本发明实施例中数据帧的帧头部分携带导频信号的方式,是较现有标准的一个区别技术特征,例如,假设有m个用于传输数据流的发送天线,以及有n(n<m)个向接收端设备传输的数据流,现有标准中,只在数据流中数据帧的帧头部分携带n个发送天线的导频信号,而本方案为了达到最优的分集或选择效果,要求在数据帧的帧头部分携带m个发送天线的导频信号。
信道信息获取模块620,用于根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息。
数据部分接收模块630,用于接收所述发送端设备发送的所述数据流中数据帧的数据部分。
具体的,数据部分接收模块630用于在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分。所述发送天线的组合方式,是属于不同的所述发送端设备的多个发送天线的组合方式。
其中,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成; 所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
可选的,具体实现过程中,所述数据部分接收模块630,具体用于在序号为N的所述发送周期,通过一个所述资源单元,接收所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,所述M为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
相应地,发送端设备发送数据流中的数据帧的数据部分的方法可以是:假设发送端设备获取到M种发送天线的组合方式,其中,所述M为自然数。那么,发送端设备在序号为N的发送周期,通过一个资源单元,采用第N种发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序。
另可选的,具体实现过程中,所述数据部分接收模块630,具体用于在序号为N的所述发送周期,通过第K个所述资源单元,接收所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,M种所述发送天线的组合方式有J种排列方式,所述M和所述J为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
相应地,发送端设备发送数据流中的数据帧的数据部分的方法可以是:假设发送端设备获取到M种发送天线的组合方式,以及获取到M种发送天线的组合方式的J种排列方式,其中,M和J为自然数。那么,发送端设备在序号为N的发送周期,通过第K个资源单元,采用第K种所述排列方式中的第N个发送天线的组合方式,向接收端设备发送数据部分,其中,N为不大于M的自然数,发送周期的序号以1至M的顺序循环排序,K为不大于J的自然数。
数据信息获取模块640,具体用于根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
具体的,数据信息获取模块640根据指定的所述发送天线的组合方式中的 发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
作为一个可选的示例,对应图16所示的方案,数据信息获取模块640根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
作为另一个可选的示例,对应图17所示的方案,数据信息获取模块640根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
可选的,请参阅图11,如图所示本发明实施例中的接收端设备还可以包括天线组合选择模块650和天线组合反馈模块660,其中:
天线组合选择模块650,用于从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
需要指出的是,不同的发送天线的组合方式在相同的信道上会有不同的增益,所述预设要求可以是信道增益最佳的一个或多个发送天线的组合方式。
具体的,天线组合选择模块650在接收到发送端设备发送的数据流中数据帧的帧头部分后,根据导频信号检测发送端设备组中所有发送端设备的发送天线所用的信道,进而根据信道质量选出信道增益最佳的一个或多个发送天线的组合方式。
天线组合反馈模块660,用于将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
相应地,发送端设备发送数据流中的数据帧的数据部分的方法还可以是:发送端设备只需采用反馈的发送天线的组合方式,发送数据流中数据帧的数据部分。同理,发送端设备可类比上述两种可选的实施方式发送数据部分。
图12是本发明实施例提供的一种无线通信系统的结构示意图。如图12 所示本发明实施例中的无线通信系统至少可以包括发送端设备710和接收端设备720,其中:
所述发送端设备710为如前文结合图9所描述的发送端设备,用于向接收端设备720发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数。
所述接收端设备720为如前文结合图11所描述的接收端设备,用于接收发送端设备710发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据的所述发送天线的总数;根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;接收所述发送端设备710发送的所述数据流中数据帧的数据部分;根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
图13是本发明实施例中的一种发送端设备的结构示意图,如图13所示,该发送端设备可以包括:至少一个处理器801,例如CPU,至少一个天线接口803,存储器804,至少一个通信总线802。其中,通信总线802用于实现这些组件之间的连接通信。存储器804可以是高速RAM存储器,也可以是非易失的存储器(non-volatile memory),例如至少一个磁盘存储器。可选的,存储器804还可以是至少一个位于远离前述处理器801的存储装置。存储器804中存储一组程序代码,且处理器801用于调用存储器804中存储的程序代码,用于执行以下操作:
向所述接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于所述发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数;
向所述接收端设备发送所述数据流中数据帧的数据部分。
可选的,处理器801执行向所述接收端设备发送所述数据流中数据帧的数据部分的具体操作为:
获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于 不同的所述发送端设备的多个所述发送天线的集合;
确定至少一个资源单元,所述资源单元由时域资源和频域资源组成;
在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
可选的,处理器801执行获取至少一种所述发送天线的组合方式的具体操作可以为:
接收所述接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
进一步地,处理器801执行在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分的具体操作为:
获取M种所述发送天线的组合方式,其中,所述M为自然数;
在序号为N的所述发送周期,通过一个所述资源单元,采用第N种所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
进一步可选地,处理器801执行在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分的具体操作为:
获取M种所述发送天线的组合方式,以及获取M种所述发送天线的组合方式的J种排列方式,其中,所述M和所述J为自然数;
在序号为N的所述发送周期,通过第K个所述资源单元,采用第K种所述排列方式中的第N个所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
另可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由 一组子载波组成。
图14是本发明实施例中的一种接收端设备的结构示意图,如图14所示,该接收端设备可以包括:至少一个处理器901,例如CPU,至少一个天线接口903,存储器904,至少一个通信总线902。其中,通信总线902用于实现这些组件之间的连接通信。存储器904可以是高速RAM存储器,也可以是非易失的存储器(non-volatile memory),例如至少一个磁盘存储器。可选的,存储器904还可以是至少一个位于远离前述处理器901的存储装置。存储器904中存储一组程序代码,且处理器901用于调用存储器904中存储的程序代码,用于执行以下操作:
接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据的所述发送天线的总数;
根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
接收所述发送端设备发送的所述数据流中数据帧的数据部分;
根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
可选的,处理器901执行接收所述发送端设备发送的所述数据流中数据帧的数据部分的具体操作为:
在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分。
相应的,处理器901执行根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息的具体操作为:
根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
又可选的,处理器901还执行:
从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式;
将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
进一步地,处理器901执行在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分的具体操作为:
在序号为N的所述发送周期,通过一个所述资源单元,接收所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,所述M为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
相应的,处理器901执行根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息的具体操作为:
根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
进一步可选地,处理器901执行在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分的具体操作为:
在序号为N的所述发送周期,通过第K个所述资源单元,接收所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,M种所述发送天线的组合方式有J种排列方式,所述M和所述J为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
相应的,处理器901执行根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息的具体操作为:
根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N 个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
另可选的,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
本发明实施例还提出了一种计算机存储介质,所述计算机存储介质存储有程序,所述程序包括若干指令用以执行本发明实施例图5~图6所描述的一种数据流的发送方法中的部分或全部的步骤。
本发明实施例还提出了一种计算机存储介质,所述计算机存储介质存储有程序,所述程序包括若干指令用以执行本发明实施例图7~图8所描述的一种数据流的传输方法中的部分或全部的步骤。
由上可见,本发明实施例中的发送端设备先向接收端设备发送数据流中数据帧的帧头部分,帧头部分携带有指定数量的导频信号,其中指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,原因在于本发明实施例将会对发送的数据流中数据帧的数据部分进行分集,故数据部分包括发送端设备组中所有发送端设备的发送天线所发送的消息,通过在数据帧的帧头部分携带所有发送天线的导频信号可保证接收端设备能获取所有发送天线对应的信道信息;然后发送端设备再向接收端设备发送数据流中数据帧的数据部分,其中数据部分已作分集,可以实现提高WiFi的传输增益。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通过计算机程序来指令相关的硬件来完成,所述的程序可存储于一计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。其中,所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory,ROM)或随机存储记忆体(Random Access Memory,RAM)等。
在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示例”、 “具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中,“多个”的含义是至少两个,例如两个,三个等,除非另有明确具体的限定。
尽管上面已经示出和描述了本发明的实施例,可以理解的是,上述实施例是示例性的,不能理解为对本发明的限制,本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。
以上所揭露的仅为本发明较佳实施例而已,当然不能以此来限定本发明之权利范围,因此依本发明权利要求所作的等同变化,仍属本发明所涵盖的范围。

Claims (29)

  1. 一种数据流的发送方法,其特征在于,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述方法包括:
    向所述接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于所述发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数;
    向所述接收端设备发送所述数据流中数据帧的数据部分。
  2. 如权利要求1所述的方法,其特征在于,所述向所述接收端设备发送所述数据流中数据帧的数据部分,包括:
    获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合;
    确定至少一个资源单元,所述资源单元由时域资源和频域资源组成;
    在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
  3. 如权利要求2所述的方法,其特征在于,所述获取至少一种所述发送天线的组合方式,包括:
    接收所述接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
  4. 如权利要求2或3任一项所述的方法,其特征在于,所述获取至少一种所述发送天线的组合方式,包括:
    获取M种所述发送天线的组合方式,其中,所述M为自然数;
    所述在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分,包括:
    在序号为N的所述发送周期,通过一个所述资源单元,采用第N种所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
  5. 如权利要求2或3任一项所述的方法,其特征在于,所述获取至少一种所述发送天线的组合方式,包括:
    获取M种所述发送天线的组合方式,以及获取M种所述发送天线的组合方式的J种排列方式,其中,所述M和所述J为自然数;
    所述在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分,包括:
    在序号为N的所述发送周期,通过第K个所述资源单元,采用第K种所述排列方式中的第N个所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
  6. 如权利要求1至5任一项所述的方法,其特征在于,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
    所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
  7. 一种数据流的接收方法,其特征在于,所述方法应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述方法包括:
    接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据的所述发送天线的总数;
    根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
    接收所述发送端设备发送的所述数据流中数据帧的数据部分;
    根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
  8. 如权利要求7所述的方法,其特征在于,所述接收所述发送端设备发送的所述数据流中数据帧的数据部分,包括:
    在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分;
    所述根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息,包括:
    根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
  9. 如权利要求8所述的方法,其特征在于,所述根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息之后,还包括:
    从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式;
    将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
  10. 如权利要求8或9任一项所述的方法,其特征在于,所述在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分,包括:
    在序号为N的所述发送周期,通过一个所述资源单元,接收所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,所述M为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序;
    所述根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息,包括:
    根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
  11. 如权利要求8或9任一项所述的方法,其特征在于,所述在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分,包括:
    在序号为N的所述发送周期,通过第K个所述资源单元,接收所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,M种所述发送天线的组合方式有J种排列方式,所述M和所述J为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数;
    所述根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息,包括:
    根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
  12. 如权利要求7至11任一项所述的方法,其特征在于,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
    所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
  13. 一种发送端设备,其特征在于,所述发送端设备应用于采用多输入多 输出技术的无线通信系统,所述无线通信系统包括接收端设备和由多个所述发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述发送端设备包括:
    帧头部分发送模块,用于向接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数;
    数据部分发送模块,用于向所述接收端设备发送所述数据流中数据帧的数据部分。
  14. 如权利要求13所述的发送端设备,其特征在于,所述数据部分发送模块,包括:
    天线组合获取单元,用于获取至少一种所述发送天线的组合方式,所述发送天线的组合方式为属于不同的所述发送端设备的多个所述发送天线的集合;
    资源单元获取单元,用于确定至少一个资源单元,所述资源单元由时域资源和频域资源组成;
    数据部分发送单元,用于在各个预设的发送周期,通过所述资源单元,采用指定的所述发送天线的组合方式,向所述接收端设备发送所述数据部分。
  15. 如权利要求14所述的发送端设备,其特征在于,所述天线组合获取单元,具体用于接收所述接收端设备反馈的发送天线的组合方式,所述反馈的发送天线的组合方式是由所述接收端设备根据所述导频信号进行信道估计后,从所有用于发送数据流的所述发送天线中选出的其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式。
  16. 如权利要求14或15任一项所述的发送端设备,其特征在于,所述天线组合获取单元,用于获取M种所述发送天线的组合方式,其中,所述M为自然数;
    所述数据部分发送单元,具体用于在序号为N的所述发送周期,通过一个所述资源单元,采用第N种所述发送天线的组合方式,向所述接收端设备 发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序。
  17. 如权利要求14或15任一项所述的发送端设备,其特征在于,所述天线组合获取单元,用于获取M种所述发送天线的组合方式,以及获取M种所述发送天线的组合方式的J种排列方式,其中,所述M和所述J为自然数;
    所述数据部分发送单元,具体用于在序号为N的所述发送周期,通过第K个所述资源单元,采用第K种所述排列方式中的第N个所述发送天线的组合方式,向所述接收端设备发送所述数据部分,其中,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数。
  18. 如权利要求13至17任一项所述的发送端设备,其特征在于,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
    所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
  19. 一种接收端设备,其特征在于,所述接收端设备应用于采用多输入多输出技术的无线通信系统,所述无线通信系统包括所述接收端设备和由多个发送端设备组成的发送端设备组,其中至少一个所述发送端设备包括多个发送天线,所述接收端设备接收的数据流的总数小于所述发送端设备组中所有发送端设备的所有用于发送数据流的发送天线的总数,所述接收端设备包括:
    帧头部分接收模块,用于接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有用于发送数据的所述发送端设备的所有发送天线的总数;
    信道信息获取模块,用于根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
    数据部分接收模块,用于接收所述发送端设备发送的所述数据流中数据帧的数据部分;
    数据信息获取模块,用于根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
  20. 如权利要求19所述的接收端设备,其特征在于,所述数据部分接收模块,具体用于在各个预设的发送周期,通过至少一个资源单元,接收所述发送端设备采用指定的至少一种发送天线的组合方式发送的所述数据部分;
    数据信息获取模块,具体用于根据指定的所述发送天线的组合方式中的发送天线对应的信道信息,对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
  21. [根据细则91更正 30.01.2015]
    如权利要求20所述的接收端设备,其特征在于,所述接收端设备还包括:
    天线组合选择模块,用于从所有用于发送数据流的所述发送天线中选出其对应的信道信息的质量符合预设要求的一种或多种所述发送天线的组合方式;
    天线组合反馈模块,用于将选出的所述一种或多种所述发送天线的组合方式反馈给所述发送端设备。
  22. 如权利要求20或21任一项所述的接收端设备,其特征在于,所述数据部分接收模块,具体用于在序号为N的所述发送周期,通过一个所述资源单元,接收所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,所述M为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序;
    所述数据信息获取模块,具体用于根据第N种所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第N种所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
  23. 如权利要求20至21任一项所述的接收端设备,其特征在于,所述数据部分接收模块,具体用于在序号为N的所述发送周期,通过第K个所述资源单元,接收所述发送端设备采用第K种所述排列方式中的第N个所述发送 天线的组合方式发送的所述数据部分,其中,所述发送天线的组合方式有M种,M种所述发送天线的组合方式有J种排列方式,所述M和所述J为自然数,所述N为不大于M的自然数,所述发送周期的序号以1至M的顺序循环排序,所述K为不大于J的自然数;
    所述数据信息获取模块,具体用于根据第K种所述排列方式中的第N个所述发送天线的组合方式中的发送天线对应的信道信息,对所述发送端设备采用第K种所述排列方式中的第N个所述发送天线的组合方式发送的所述数据部分进行信号检测以获取所述数据部分的数据信息。
  24. 如权利要求19至23任一项所述的接收端设备,其特征在于,所述资源单元在时域资源上由一个或多个连续的OFDM符号组成;
    所述资源单元在频域资源上由一个或多个信道组成,或者在频域资源上由一组子载波组成。
  25. 一种无线通信系统,其特征在于,所述无线通信系统包括如权利要求13至18中任一项所述的发送端设备和如权利要求19至24中任一项所述的接收端设备。
  26. 一种计算机存储介质,其特征在于,所述计算机存储介质存储有程序,所述程序执行时包括权利要求1至6中任一项所述的步骤。
  27. 一种计算机存储介质,其特征在于,所述计算机存储介质存储有程序,所述程序执行时包括权利要求7至12中任一项所述的步骤。
  28. 一种发送端设备,其特征在于,所述发送端设备包括天线接口、存储器以及处理器,其中,存储器中存储一组程序,且处理器用于调用存储器中存储的程序,用于执行以下操作:
    向所述接收端设备发送数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于所述发送端设备组中所有发送端设备的所有用于发送数据流的所述发送天线的总数;
    向所述接收端设备发送所述数据流中数据帧的数据部分。
  29. 一种接收端设备,其特征在于,所述接收端设备包括天线接口、存储器以及处理器,其中,存储器中存储一组程序,且处理器用于调用存储器中存储的程序,用于执行以下操作:
    接收发送端设备发送的数据流中数据帧的帧头部分,所述帧头部分携带有指定数量的导频信号,所述指定数量等于发送端设备组中所有发送端设备的所有用于发送数据的所述发送天线的总数;
    根据所述数据帧的帧头部分携带的所述指定数量的导频信号进行信道估计以获取所有用于发送数据流的所述发送天线对应的信道信息;
    接收所述发送端设备发送的所述数据流中数据帧的数据部分;
    根据所述信道信息对所述数据帧的数据部分进行信号检测以获取所述数据部分的数据信息。
PCT/CN2014/093586 2014-12-11 2014-12-11 一种数据流的传输方法、发送端设备、接收端设备及系统 WO2016090604A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2014/093586 WO2016090604A1 (zh) 2014-12-11 2014-12-11 一种数据流的传输方法、发送端设备、接收端设备及系统
CN201480083914.7A CN107005295B (zh) 2014-12-11 2014-12-11 一种数据流的传输方法、发送端设备、接收端设备及系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/093586 WO2016090604A1 (zh) 2014-12-11 2014-12-11 一种数据流的传输方法、发送端设备、接收端设备及系统

Publications (1)

Publication Number Publication Date
WO2016090604A1 true WO2016090604A1 (zh) 2016-06-16

Family

ID=56106473

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/093586 WO2016090604A1 (zh) 2014-12-11 2014-12-11 一种数据流的传输方法、发送端设备、接收端设备及系统

Country Status (2)

Country Link
CN (1) CN107005295B (zh)
WO (1) WO2016090604A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113411641A (zh) * 2021-06-01 2021-09-17 深圳市洲明科技股份有限公司 数据传输方法、接收方法、发送端、接收端及通信系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101005303A (zh) * 2006-01-18 2007-07-25 中兴通讯股份有限公司 多输入多输出正交频分复用系统中的发射天线选择与自适应调制方法
CN101414859A (zh) * 2007-10-18 2009-04-22 华为技术有限公司 组播和广播服务协作传输的方法、系统及装置
US20090190684A1 (en) * 2005-01-13 2009-07-30 Panasonic Corporation Wireless communication method, radio receiving apparatus, radio transmitting apparatus, and wireless communication system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7039370B2 (en) * 2003-10-16 2006-05-02 Flarion Technologies, Inc. Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems
EP1643661B1 (en) * 2004-09-07 2008-05-28 Samsung Electronics Co.,Ltd. MIMO system with adaptive switching of transmission scheme
KR100706634B1 (ko) * 2004-11-12 2007-04-11 한국전자통신연구원 성능이 향상된 다중 안테나 시스템
CN101039136B (zh) * 2006-03-15 2011-09-14 华为技术有限公司 基于空频编码的多天线发射分集方法及其系统
CN100578963C (zh) * 2006-03-20 2010-01-06 华为技术有限公司 一种多天线通信中发射信号的方法及系统
KR100835285B1 (ko) * 2006-12-06 2008-06-05 한국전자통신연구원 빔 형성 방법 및 이를 위한 빔 형성 장치
WO2009001268A2 (en) * 2007-06-22 2008-12-31 Nokia Corporation Linear transformation matrices for distributed diversity
CN101340232B (zh) * 2007-07-04 2012-07-04 鼎桥通信技术有限公司 一种多媒体广播组播业务的传输方法和网络设备
CN101425832B (zh) * 2008-11-10 2012-09-26 中兴通讯股份有限公司 一种基于零陷展宽的自适应多用户波束成形方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090190684A1 (en) * 2005-01-13 2009-07-30 Panasonic Corporation Wireless communication method, radio receiving apparatus, radio transmitting apparatus, and wireless communication system
CN101005303A (zh) * 2006-01-18 2007-07-25 中兴通讯股份有限公司 多输入多输出正交频分复用系统中的发射天线选择与自适应调制方法
CN101414859A (zh) * 2007-10-18 2009-04-22 华为技术有限公司 组播和广播服务协作传输的方法、系统及装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113411641A (zh) * 2021-06-01 2021-09-17 深圳市洲明科技股份有限公司 数据传输方法、接收方法、发送端、接收端及通信系统

Also Published As

Publication number Publication date
CN107005295B (zh) 2020-09-29
CN107005295A (zh) 2017-08-01

Similar Documents

Publication Publication Date Title
US10680773B2 (en) Method and apparatus for transmitting pilot signal
US9295051B2 (en) Systems and methods for bundling resource blocks in a wireless communication network
KR101726864B1 (ko) 무선랜 시스템에서 mu-mimo 방법, mu-mimo를 위한 액세스 포인트 및 스테이션
CN115314083B (zh) 用于自适应解调参考信号的密度的方法和节点
US8873489B2 (en) Signaling methods for UE-specific dynamic downlink scheduler in OFDMA systems
CN102355325B (zh) 一种pucch资源映射的方法及装置
US11283569B2 (en) Data transmission method, network device, and terminal device
WO2019029378A1 (zh) 参考信号配置信息的指示方法、基站及终端
WO2019029823A1 (en) DYNAMIC MANAGEMENT OF UPLINK CONTROL SIGNALING RESOURCES IN A WIRELESS NETWORK
WO2014176967A1 (zh) 一种解调参考信号图样信息的选取方法、系统及装置
WO2019062585A1 (zh) 一种资源调度方法、网络设备以及通信设备
EP4017175A1 (en) Frequency domain resource allocation method and apparatus
EP3515141B1 (en) Method and device for obtaining and delivering drms port configuration information
WO2014166443A1 (zh) 一种干扰测量方法、系统、相关设备及存储介质
US11736328B2 (en) Wireless communication method and wireless communication terminal
US10959243B2 (en) Systems and methods for providing resource signaling within a wireless local area network (WLAN)
CN108667492B (zh) 一种预编码颗粒度的确定方法和装置
CN111193581B (zh) 发送和接收物理下行控制信道的方法以及通信装置
EP3934148A1 (en) Apparatus and method for communication based on multi-resource unit in wireless local area network system
WO2016090604A1 (zh) 一种数据流的传输方法、发送端设备、接收端设备及系统
WO2013138989A1 (en) Method and apparatus for determining the physical downlink shared channel fallback mode
WO2018201830A1 (zh) 资源配置方法、装置、存储介质及处理器
JP2017539146A (ja) 情報送信方法、アクセスポイントおよびユーザ装置
US11444818B2 (en) Signal transmission method and apparatus
WO2017028364A1 (zh) 一种参考信号配置方法及设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14907892

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14907892

Country of ref document: EP

Kind code of ref document: A1