WO2016062066A1 - Procédé de réception, procédé d'émission, appareil de réception et appareil d'émission pour données - Google Patents

Procédé de réception, procédé d'émission, appareil de réception et appareil d'émission pour données Download PDF

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Publication number
WO2016062066A1
WO2016062066A1 PCT/CN2015/078621 CN2015078621W WO2016062066A1 WO 2016062066 A1 WO2016062066 A1 WO 2016062066A1 CN 2015078621 W CN2015078621 W CN 2015078621W WO 2016062066 A1 WO2016062066 A1 WO 2016062066A1
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Prior art keywords
data
antennas
transmitting
antenna
grouping
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PCT/CN2015/078621
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English (en)
Chinese (zh)
Inventor
庄东风
李萍
张婷
黄�俊
秦洪峰
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中兴通讯股份有限公司
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Publication of WO2016062066A1 publication Critical patent/WO2016062066A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Definitions

  • the present invention relates to the field of communications, and in particular to a data receiving method, a transmitting method, a receiving device, and a transmitting device.
  • Spread spectrum technology Direct sequence spread spectrum technology
  • GSM Global Mobile Communications
  • CDMA Code Division Multiple Access
  • LTE Long-Term Evolution
  • GSM Global Mobile Communications
  • CDMA Code Division Multiple Access
  • LTE Long-Term Evolution
  • the use of spread spectrum techniques allows narrowband signals to be transmitted over a wider frequency band, allowing the receiver to demodulate at a lower signal to noise ratio, with useful signal power approaching noise power or even submerging under noise.
  • Spread spectrum communication improves anti-jamming performance, but it occupies more bandwidth resources.
  • more communication systems use different spreading sequences for different terminals to share frequency resources to improve frequency band utilization, that is, code division multiple access.
  • the maximum number of terminals that the code division multiple access method can support does not exceed the number of available spreading sequences, such as the Physical Uplink Control Channel (PUCCH) in the LTE system. Therefore, in the related art, the number of terminals that can simultaneously transmit data in the data transmission system is small.
  • PUCCH Physical Uplink Control Channel
  • the embodiment of the invention provides a data receiving method, a transmitting method, a receiving device and a transmitting device, so as to solve at least the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited.
  • a data receiving method includes: grouping, according to a predetermined grouping rule, an antenna for transmitting data of a terminal; and notifying the terminal of the grouped result of the grouping; And the data obtained by processing, by the terminal, the sent data according to the grouping result, wherein the grouping result is used by the terminal to perform data on each antenna of the antenna according to a spreading code sequence corresponding to the group to which the antenna belongs.
  • Spread spectrum processing includes: grouping, according to a predetermined grouping rule, an antenna for transmitting data of a terminal; and notifying the terminal of the grouped result of the grouping; And the data obtained by processing, by the terminal, the sent data according to the grouping result, wherein the grouping result is used by the terminal to perform data on each antenna of the antenna according to a spreading code sequence corresponding to the group to which the antenna belongs.
  • the grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; transmitting the same information between different antennas
  • the antennas of the terminals are respectively allocated to different groups; the antennas of the terminals transmitting different information between different antennas are respectively allocated to the same group; the antennas of the terminals transmitting different information between different antennas are respectively allocated to different groups.
  • the method further includes: performing equalization processing on the received data.
  • performing equalization processing on the received data includes: when the packet in which the antenna for transmitting the data is located includes two or more antennas, performing multi-user multiple input and multiple output on the data. MU-MIMO equalization processing; and/or, when one antenna is included in the packet in which the antenna transmitting the data is located, single-user multiple input and multiple-output SU-MIMO equalization processing is performed.
  • a data transmission method including: receiving, by a base station, a grouping result of grouping antennas set to transmit data; and data corresponding to each antenna according to a group to which the antenna belongs
  • the spreading code sequence is subjected to spreading processing; the data after the spreading processing is transmitted and processed.
  • a data receiving apparatus comprising: a grouping module configured to group an antenna for transmitting data of a terminal according to a predetermined grouping rule; and a notification module configured to group the group The grouping result is sent to the terminal; the first receiving module is configured to receive data obtained by processing, by the terminal, the data sent according to the grouping result, wherein the grouping result is used by the terminal pair
  • the data on each antenna is spread-spectrum processed according to the spreading code sequence corresponding to the group to which the antenna belongs.
  • the grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; transmitting the same information between different antennas
  • the antennas of the terminals are respectively allocated to different groups; the antennas of the terminals transmitting different information between different antennas are respectively allocated to the same group; the antennas of the terminals transmitting different information between different antennas are respectively allocated to different groups.
  • the data receiving apparatus further includes: a first processing module, configured to perform equalization processing on the received data.
  • the first processing module includes: a first processing unit, configured to perform multi-user on the data when two or more antennas are included in a packet in which an antenna that transmits the data is included Multi-input and multi-output MU-MIMO equalization processing; and/or, the second processing unit is configured to perform single-user multi-input and multi-output SU- on the data when the antenna in which the antenna transmitting the data is located includes one antenna MIMO equalization processing.
  • a data transmitting apparatus including: a second receiving module, configured to receive a grouping result sent by a base station to group an antenna for transmitting data; and a second processing module, set In order to perform data spreading processing on the data of each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs, the transmitting module is configured to perform transmission processing on the data after the spreading processing.
  • the antenna for transmitting data of the terminal is grouped according to a predetermined grouping rule; the result of the grouping after the grouping is notified to the terminal; and the method for transmitting the packet according to the grouping result sent by the terminal is received.
  • the problem that the number of terminals that can simultaneously transmit data in the transmission system is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.
  • FIG. 1 is a flowchart of a data receiving method according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a data transmitting method according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of transmission data of a MIMO system according to an embodiment of the present invention.
  • FIG. 4 is a block diagram showing the structure of a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 5 is a block diagram showing a preferred structure of a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a first processing module 62 in a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a block diagram showing the structure of a data transmitting apparatus according to an embodiment of the present invention.
  • FIG. 9 is a structural block diagram of a terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of time domain symbol positions of data signals and pilot signals in accordance with an embodiment of the present invention.
  • FIG. 1 is a flowchart of a data receiving method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 grouping antennas of the terminal for transmitting data according to a predetermined grouping rule
  • Step S104 notifying the terminal of the grouping result after the grouping
  • Step S106 The data obtained by processing the sent data according to the grouping result sent by the terminal, where the result of the grouping is used by the terminal to spread the data on each antenna of the antenna according to the spreading code sequence corresponding to the group to which the antenna belongs. deal with.
  • the antennas for transmitting data of the terminal are grouped according to a predetermined grouping rule; the result of the grouping after the grouping is notified to the terminal; and the data obtained by the receiving terminal after processing the transmitted data according to the result of the grouping, wherein
  • the result of the grouping is used by the terminal to perform spreading processing on the data of each antenna of the terminal according to the spreading code sequence corresponding to the group to which the antenna belongs, that is, the result of the grouping is used by the terminal to use data on the antennas belonging to the same group.
  • the same spreading code sequence is spread-spectrum processing, and the antennas are grouped, and the data transmitted on one group of antennas is spread using the same spreading code sequence, so that the number of the spreading code sequences is kept constant.
  • the number of receiving antennas is increased to increase the spatial freedom of the multi-antenna wireless channel, thereby increasing the number of terminals that can simultaneously perform data transmission.
  • the invention solves the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.
  • one base station can support data transmission of multiple terminals, and each terminal can transmit data using a single antenna or multiple antennas.
  • the base station can group all antennas of all terminals, and all antennas in the same group can use the same time domain and frequency domain resources to transmit data, and all antennas in different groups use the same or different time domain and frequency domain resources to send data.
  • the above grouping rule may include at least one of: allocating antennas of different terminals to the same group; allocating antennas of different terminals to different groups; respectively assigning antennas of terminals transmitting the same information between different antennas to Different groups; antennas of terminals transmitting different information between different antennas are respectively assigned to the same group; antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.
  • the method further includes: performing equalization processing on the received data.
  • the terminal is received at the base station After the transmitted data, the received data is first de-framed, and then the de-framed data of each receiving antenna is despread on each spreading code track, and then equalized on each code channel to obtain each Demodulated data of data on all antennas in each code channel.
  • the performing equalization processing on the received data by the base station may include: performing multi-user multiple input and multiple MU-MIMO equalization processing on the data when the packet in which the antenna for transmitting data is located includes two or more antennas; and/or When the antenna in which the antenna for transmitting data is located includes one antenna, the data is subjected to single-user multiple input and multiple-output SU-MIMO equalization processing. That is, if there are multiple antennas in the packet corresponding to the current code channel, MU-MIMO equalization is performed; if there is only one antenna in the packet corresponding to the current code channel, SU-MIMO equalization is performed. And, if the same information is transmitted between different antennas of the same user terminal, the inter-antenna combining is performed.
  • FIG. 2 is a flowchart of a data sending method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 receiving a grouping result sent by the base station to group the antennas for transmitting data
  • Step S204 performing spreading processing on the data on each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs;
  • Step S206 performing transmission processing on the data after the spread spectrum processing.
  • the result of grouping the antennas for transmitting data sent by the base station is received; the data on each antenna is subjected to spreading processing according to the spreading code sequence corresponding to the group to which the antenna belongs; and the data after the spreading processing is performed.
  • Transmitting processing is implemented to group antennas, and data transmitted on a group of antennas is spread using the same spreading code sequence, so that the number of receiving antennas is increased while keeping the number of spreading code sequences unchanged.
  • the spatial freedom of the multi-antenna wireless channel is increased, thereby increasing the number of terminals that can be simultaneously transmitted.
  • the invention solves the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.
  • MIMO Multiple Input Multiple Output
  • Step S302 the base station groups each antenna of each user terminal, each packet corresponds to a spreading code sequence, and the base station notifies the user terminal of the grouping result;
  • Step S304 each user terminal performs coding and constellation point mapping on the data transmitted on each antenna, and performs spreading according to the grouping result sent by the base station, and transmits data on the corresponding antenna after resource mapping and framing;
  • Step S306 the base station despreads the data received on each of the receiving antennas on each of the spreading code channels, and then performs MU-MIMO or SU-MIMO equalization on each code channel to obtain each of each user terminal.
  • the demodulation result of the data transmitted on the transmitting antenna is the demodulation result of the data transmitted on the transmitting antenna.
  • a data receiving device and a data transmitting device are provided, which are used to implement the above-mentioned embodiments and preferred embodiments, and are not described again.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 4 is a structural block diagram of a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a grouping module 42, a notification module 44, and a first receiving module 46. The device will be described below.
  • the grouping module 42 is configured to group the antennas for transmitting data of the terminal according to a predetermined grouping rule; the notification module 44 is connected to the grouping module 42, and is configured to notify the terminal of the grouping result after the grouping; the first receiving module 46. Connect to the foregoing notification module 44, and set the data obtained by processing the sent data according to the grouping result sent by the terminal, where the result of the grouping is used by the terminal to correspond to the data of each antenna of the antenna according to the group to which the antenna belongs.
  • the spreading code sequence is subjected to spread spectrum processing.
  • the foregoing grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; and assigning antennas of terminals transmitting the same information between different antennas to respectively Different groups; antennas of terminals transmitting different information between different antennas are respectively assigned to the same group; antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.
  • FIG. 5 is a block diagram showing a preferred structure of a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes a first processing module 52 in addition to all the modules shown in FIG. Description.
  • the first processing module 52 is coupled to the first receiving module 46 and configured to perform equalization processing on the received data.
  • FIG. 6 is a structural block diagram of a first processing module 52 in a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 6, the first processing module 52 includes a first processing unit 62 and/or a second processing unit 64. The first processing module 52 will be described below.
  • the first processing unit 62 is configured to perform multi-user multiple input and multiple MU-MIMO equalization processing on the data when the packet in which the antenna for transmitting data is included includes two or more antennas; and/or the second processing unit 64.
  • a base station performs deframing processing on data of each of its receiving antennas, and the base station despreads data of each of its receiving antennas in each spread spectrum. Perform despreading on the code track, and then perform equalization on each code channel to obtain demodulated data of all antennas in each code channel: if the current spread spectrum code corresponding packet includes multiple antennas, perform MU-MIMO equalization If the current packet of the spreading code channel includes only one antenna, SU-MIMO equalization is performed. If the same information is transmitted between different antennas of the same user terminal, the inter-antenna combining is performed.
  • FIG. 8 is a structural block diagram of a data transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes a second receiving module 82, a second processing module 84, and a transmitting module 86. The device will be described below.
  • the second receiving module 82 is configured to receive a packet result sent by the base station to group the antenna for transmitting data
  • the second processing module 84 is connected to the second receiving module 82, and is configured to follow the data on each antenna.
  • the spreading code sequence corresponding to the group to which the antenna belongs is subjected to spreading processing; the transmitting module 86 is connected to the second processing module 84, and is configured to perform transmission processing on the data after the spreading processing.
  • each user terminal performs spreading processing on transmission data for each antenna according to a packet result notified by a base station: the same group uses the same A spreading code sequence, using different spreading code sequences between different groups. Then, the spread spectrum result is mapped to the specified time domain and frequency domain resource location, and data is sent after the data is framed.
  • a A data transmission system and device to increase the number of terminals that can be simultaneously transmitted in the system.
  • MIMO technology is based on multi-antenna transmission and multi-antenna reception, and has gradually become the core technology in modern communication systems.
  • Theoretical studies have shown that MIMO technology can multiply the channel capacity without increasing the channel bandwidth and antenna transmit power, and the channel capacity increases linearly with the number of antennas.
  • the spatial sub-channel formed between the transmitting end and the receiving end antenna array is sufficiently independent, the spatial channel can be regarded as a plurality of parallel spatial transmission channels, thereby allowing multiple data streams (multi-terminal data streams) to be The same time domain and frequency domain resources are transmitted through different spatial subchannels, that is, space division multiplexing.
  • a terminal device in a wireless communication system is provided, and the operations in the terminal are described below:
  • Orthogonal Frequency Division Multiplexing OFDM
  • the total number of subcarriers is
  • Each resource block (Resource Block, RB for short) includes Continuous subcarriers, the base station allocates different resource index parameters for each antenna of each user terminal
  • the data to be transmitted by the user terminal u is coded and modulated.
  • the spreading sequence that all user terminals can use is The antenna p of the user terminal u uses the index number as Spreading sequence for spreading:
  • l corresponds to the data symbol position index of the OFDM system.
  • the user terminal u cyclically shifts and precodes the spread data:
  • the RB location corresponding to the data z (u,p) (k,l) resource mapping of the user terminal u is:
  • the user terminal transmits a reference signal (or a pilot signal) at the same RB position as the data signal, and the reference signal consists of a base sequence and a cyclic shift:
  • FIG. 10 is a schematic diagram of the time domain symbol positions of the data signals and the pilot signals according to an embodiment of the present invention.
  • a base station apparatus in a wireless communication system is further provided, and the following operations in the base station are continued:
  • the base station side receives the signal of each terminal UE, and extracts the data signal according to the reverse process of resource mapping.
  • the channel estimation of the reference signal comprises the steps of: multiplying the received reference signal by a conjugate of the local mother code sequence to perform the annihilation of the mother code; and performing an FFT operation on the data after the mother code is decoded, the cyclically shifting is performed in the transformed data. Extract the corresponding symbol and the channel estimation value of the receiving antenna; the channel estimation value after the inter-symbol average
  • the data signal processing process includes the steps of: performing pre-coding and de-coupling in accordance with the pre-coding and cyclic shift inverse processes; for each sub-carrier data, performing despreading on each occupied spreading code channel:
  • I is the unit matrix
  • the (column vector) is the demodulation result of the two user terminals u 1 and u 2 , respectively.
  • z (u) (k) is the final demodulation result of the user u.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above embodiments and the preferred embodiments solve the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, and thus the terminal that simultaneously transmits data in the data transmission system is improved.
  • the effect of the quantity is limited, and thus the terminal that simultaneously transmits data in the data transmission system is improved.

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

Abstract

L'invention concerne un procédé de réception, un procédé d'émission, un appareil de réception et un appareil d'émission pour des données. Le procédé de réception de données comprend les étapes consistant à : regrouper les antennes de terminal pour émettre des données selon une règle de regroupement prédéfinie ; informer le terminal du résultat de regroupement une fois les antennes regroupées ; recevoir les données traitées parmi les données d'émission envoyées par le terminal selon le résultat de regroupement et le résultat de regroupement est utilisé par le terminal pour effectuer un étalement du spectre sur une séquence de code à étalement de spectre correspondant aux groupes d'antennes sur les données de chaque antenne du terminal. Le problème de la limitation du nombre de terminaux destinés à émettre des données simultanément dans un système d'émission de données de l'état de la technique est résolu par l'invention et permet ainsi d'obtenir un effet d'augmentation du nombre de terminaux destinés à émettre des données simultanément dans le système d'émission de données.
PCT/CN2015/078621 2014-10-23 2015-05-08 Procédé de réception, procédé d'émission, appareil de réception et appareil d'émission pour données WO2016062066A1 (fr)

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