WO2018133173A1 - 数据传输方法及装置 - Google Patents
数据传输方法及装置 Download PDFInfo
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- WO2018133173A1 WO2018133173A1 PCT/CN2017/075046 CN2017075046W WO2018133173A1 WO 2018133173 A1 WO2018133173 A1 WO 2018133173A1 CN 2017075046 W CN2017075046 W CN 2017075046W WO 2018133173 A1 WO2018133173 A1 WO 2018133173A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0606—Space-frequency coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0643—Properties of the code block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Definitions
- the present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
- LTE Long Term Evolution
- R14 defines an open-loop full-dimension multi-antenna (open-loop-FD-MIMO) scheme for high-speed motion scenarios.
- SFBC spatial frequency block coding
- PRB physical resource block
- a reference signal can be used.
- DMRS downlink demodulation reference signal
- CSI-RS channel state information reference signal
- RE resource element
- the LTE R10 is for isolated resource particles brought by the 2-port CSI-RS, and the terminal first determines whether the current orthogonal frequency division multiplexing (OFDM) symbol in the physical resource block is used, and is in the physical resource.
- OFDM orthogonal frequency division multiplexing
- the scheduled PRB includes CSI-RS and DMRS, so there are coexistence of two kinds of RSs.
- the SFBC pairing rule is unchanged, the location of the isolated resource particles is more complicated, the number and frequency of occurrence are also significantly increased, and the possibility of discarding the entire OFDM symbol is greater.
- the embodiment of the present application provides a data transmission method and apparatus, which solves the problem that the OFDM symbol including the isolated resource particles is discarded in the LTE R14, causing waste of resources.
- the first aspect of the present application provides a data transmission method, which is applicable to a first device and a second device based on an LTE standard in a communication system, where the first device may be a base station or a terminal, and correspondingly, the second device is optional.
- the method includes:
- the first device Determining, by the first device, a first resource set and a second resource set in the first transmission subframe, where the first resource set is that all resource particles used for data transmission in the first transmission subframe are paired according to a first pairing rule a remaining set of resource particles, the second set of resources being based on all resource particles used for data transmission in the first transmission subframe
- the first pairing rule completes the paired resource particle set
- the first device sends data to the second device by using the first transmission subframe or receives data sent by the second device on the first transmission subframe according to the determined data transmission manner.
- the first device can determine the locations of the first resource set and the second resource set on the first transmission subframe, and determine data transmission manners on different resource sets, respectively, to ensure that the SFBC transmission is in the hybrid reference.
- the physical layer resources on the first transmission subframe can be utilized to the greatest extent, thereby avoiding waste of resources.
- the transmission mode on the second resource set is a transmit diversity transmission of a space frequency block code
- the first device determines that the transmission mode on the first resource set is no transmission data or space time block code transmission.
- different data transmission modes are respectively determined on different resource combinations, and the physical layer resources can be utilized to the maximum extent under the premise of satisfying the SFBC mapping rule, thereby avoiding resource waste.
- the first pairing rule includes: two paired resource particles belong to the same time domain unit, the same frequency domain unit, and a maximum of three subcarriers;
- the frequency domain unit includes: a frequency domain width of one or more physical resource blocks, where the time domain unit includes: one or more OFDM symbols.
- the determining, by the first device, the first resource set and the second resource set in the first transmission subframe include:
- the first device determines the kth sub The carrier and the resource particles for mapping the data channel on the k+nth subcarrier belong to the second resource set, wherein the n is a positive integer less than 3, and the k is used for mapping the data channel. a sequence number of a subcarrier corresponding to the resource particle, where k is a positive integer greater than or equal to 1;
- the technical solution can accurately divide all resource particles in the first transmission subframe into a first resource set and a second resource set, which lays a foundation for accurate transmission of subsequent data.
- the method further includes:
- the first device After the determining, by the first device, all the resource particles in all the time domain units in the preset frequency domain unit in the first transmission subframe, the first device performs each of the preset frequency domain units.
- the determination result of the resource particle is copied to other frequency domain units in the first transmission subframe;
- the frequency domain unit in the first transmission subframe satisfies the following two conditions: the configuration of the demodulation reference signal and the channel state information reference signal in each frequency domain unit is the same, and the precoding matrix of the demodulation reference signal is the same.
- the method can greatly reduce the judgment complexity of the first device, improve the determination speed, and has high efficiency.
- the determining, by the first device, the first resource set and the second resource set in the first transmission subframe include:
- the resource ensemble includes multiple resource subsets, each resource subset includes one or more resource particles, and each resource The particle has a unique identification number;
- the first device configures one or more resource subsets included in the first configuration instruction as the first resource set, and all resource particles used for data transmission in the first transmission subframe A set of all resource particles except the first resource set is configured as the second resource set.
- the first device of the technical solution can determine the first resource set and the second resource set in the first transmission subframe, which lays a foundation for subsequently determining the data transmission method and realizing accurate data transmission.
- the determining, by the first device, the first resource set and the second resource set in the first transmission subframe include:
- the first device configures one or more resource subsets included in the first configuration instruction as the first resource set, and all resource particles used for data transmission in the first transmission subframe A set of all resource particles except the first resource set is configured as the second resource set.
- the first device can also accurately determine the first resource set and the second resource set in the first transmission subframe, which lays a foundation for determining the data transmission method and realizing accurate data transmission.
- the first device determines that the transmission mode on the second resource set is a transmit diversity transmission of a space frequency block code, including:
- the first device maps the transmission symbols encoded by the space frequency block code on each of the plurality of antenna ports to the physical resources, the first device sequentially maps to all the resource particles in the second resource set.
- the first device determines that the transmission mode on the first resource set is non-transmission data or space-time block code transmission, including:
- the first device Determining, by the first device, that all resource particles on the first resource set do not perform mapping of any transmission symbols or the first device sequentially transmits a space-time block code encoded on each of the plurality of antenna ports The symbol is mapped to all resource particles in the first set of resources.
- a second aspect of the embodiments of the present application provides a data transmission apparatus, which is integrated in a first device, where the apparatus includes:
- a processing module configured to determine a first resource set and a second resource set in the first transmission subframe, where the first resource set is based on the first pairing of all resource particles used for data transmission in the first transmission subframe a resource resource set remaining after the rule pairing, where the second resource set is a resource particle set that is completed by the resource particles for data transmission in the first transmission subframe based on the first pairing rule;
- the processing module is further configured to determine a data transmission side on the first resource set and the second resource set formula
- transceiver module configured to send data to the second device by using the first transmission subframe or receive data sent by the second device on the first transmission subframe according to the determined data transmission manner.
- the determining, by the processing module, determining that the transmission mode on the second resource set is a space frequency block code Transmit diversity transmission determining that the transmission mode on the first resource set is no transmission data or space time block code transmission.
- the first pairing rule includes: two paired resource particles belong to the same time domain unit, the same frequency domain unit, and a maximum of three subcarriers;
- the frequency domain unit includes: a frequency domain width of one or more physical resource blocks, where the time domain unit includes: one or more OFDM symbols.
- the processing module when the determining, by the processing module, the first resource set and the second resource set in the first transmission subframe, specifically determining, in a preset order, all the data transmissions in the first transmission subframe Whether the resource particles satisfy the first pairing rule, and the resource particles for mapping the data channel on the kth subcarrier and the resource particles for mapping the data channel on the k+n subcarriers satisfy the first pairing rule Determining, that the resource particles for mapping the data channel on the kth subcarrier and the k+n subcarriers belong to the second resource set, and determining that all data in the first transmission subframe is used for data transmission
- the set of all resource particles except the second resource set in the resource particle is the first resource set;
- n is a positive integer less than 3
- the k is a sequence number of a subcarrier corresponding to a resource particle used for mapping a data channel
- the k is a positive integer greater than or equal to 1.
- the processing module is further configured to: in the preset frequency domain unit, complete all in the first transmission subframe After determining the resource particles in the time domain unit, copying the determination result of each resource particle in the preset frequency domain unit to other frequency domain units in the first transmission subframe;
- the frequency domain unit in the first transmission subframe satisfies the following two conditions: the configuration of the demodulation reference signal and the channel state information reference signal in each frequency domain unit is the same, and the precoding matrix of the demodulation reference signal is the same.
- each resource subset includes one or more resource particles, and each resource particle has a unique identification sequence number
- receives the first configuration signaling sent by the second device The first configuration signaling includes an identifier number of one or more resource subsets, and configures one or more resource subsets included in the first configuration instruction as the first resource set, where the first A set of all resource particles except for the first resource set among all resource particles for data transmission in a transmission subframe is configured as the second resource set.
- the processing module when the determining, by the processing module, the first resource set and the second resource set in the first transmission subframe, the processing module is configured to receive the second configuration signaling sent by the second device, where the second configuration The instruction is used to indicate a corpus of resources, and according to the second configuration instruction, a resource ensemble is determined in the first transmission subframe, where the resource ensemble includes multiple resource subsets, and each resource subset includes 1 One or more resource particles, each resource particle having a unique identification sequence number, and receiving the first configuration signaling sent by the second device, where the first configuration signaling includes one or more resource subsets
- the identification sequence number, the one or more resource subsets included in the first configuration instruction are configured as the first resource set, and all resource particles used for data transmission in the first transmission subframe are excluded.
- the first capital A collection of all resource particles other than the source set is configured as the second resource set.
- the processing module when determining that the transmission mode on the second resource set is a transmit diversity transmission of a space frequency block code, is configured to pass a space frequency block code on each antenna port of the multiple antenna ports.
- the encoded transmission symbols are mapped to physical resources, they are sequentially mapped to all resource particles in the second resource set.
- the processing module when the determining, by the processing module, that the transmission mode on the first resource set is not transmitting data or space-time block code transmission, specifically determining that all resource particles on the first resource set do not perform any Mapping of the transmitted symbols or the first device sequentially maps the transmitted symbols encoded by the space time block code on each of the plurality of antenna ports onto all of the resource particles in the first set of resources.
- a third aspect of the embodiments of the present application provides a data transmission apparatus, where the apparatus includes a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to execute the method provided by the first aspect of the embodiment of the present application.
- a fourth aspect of embodiments of the present application provides a data transmission apparatus comprising at least one processing element (or chip) for performing the method provided by the above first aspect.
- a fifth aspect of the embodiments of the present application provides a communication system, where the system includes a first device and a second device, where the first device is integrated in the data transmission device of the foregoing aspect, the first device and the second device Data transfer between devices.
- a sixth aspect of the embodiments of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the methods described in the above aspects.
- a seventh aspect of the embodiments of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the above aspects.
- the first device determines a first resource set and a second resource set in the first transmission subframe, where the first resource set is based on all the resource particles used for data transmission in the first transmission subframe. a set of resource particles remaining after the pairing rule is paired.
- the second resource set is a resource particle set for all resource fragments for data transmission in the first transmission subframe based on the first pairing rule, and the first device determines the first resource set and a data transmission manner on the second resource set, and transmitting data to the second device by using the first transmission subframe or receiving data sent by the second device on the first transmission subframe according to the determined data transmission manner, so that the In the SFBC transmission, when the hybrid reference signal configuration is adopted, the physical layer resources on the first transmission subframe can be utilized to the greatest extent, and resource waste is avoided.
- FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
- FIG. 2 is a schematic diagram showing the location of isolated resource particles that appear when only DMRS is configured in the PRB;
- FIG. 3 is an RE pairing rule of SFBC in LTE R10;
- Figure 4 is a schematic diagram showing the distribution of ambiguity in isolated resource particles
- FIG. 5 is a schematic flowchart diagram of Embodiment 1 of a data transmission method according to the present application.
- FIG. 6 is a schematic flowchart of Embodiment 2 of a data transmission method provided by the present application.
- FIG. 7 is a schematic flowchart of a first device confirming a first resource set and a second resource set
- FIG. 8 is a schematic diagram of a determination result of an isolated RE included in the first resource set in FIG. 7;
- FIG. 9 is a schematic flowchart diagram of Embodiment 3 of a data transmission method according to the present application.
- Figure 10 is a first resource set and a second resource set determined by the method of the embodiment shown in Figure 9;
- FIG. 11 is a schematic flowchart diagram of Embodiment 4 of a data transmission method according to the present application.
- Figure 12 is a first resource set and a second resource set determined by the method of the embodiment shown in Figure 11;
- FIG. 13 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application.
- FIG. 14 is a schematic structural diagram of still another data transmission apparatus according to an embodiment of the present application.
- FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
- the communication system provided in this embodiment includes: a network device 11 and a terminal device 12.
- the communication system may be an LTE communication system, or may be other communication systems in the future, and is not limited herein.
- the data transmission method provided by the embodiment of the present application is applied to data transmission between the network device 11 and the terminal device 12 in the communication system shown in FIG. 1, and it should be understood that it may be the downlink of the network device 11 transmitting data to the terminal device 12.
- the network device 11 can also receive the uplink transmission of the data information sent by the terminal device 12, and the specific form is determined according to actual needs, which is not limited herein.
- the communications system may also include other network entities, such as a network controller, a mobility management entity, and the like.
- network entities such as a network controller, a mobility management entity, and the like.
- the embodiment of the present application is not limited thereto.
- the communication system used in the embodiments of the present application may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, or a wideband code division multiple access (wideband code division multiple access).
- 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
- OFDM orthogonal frequency division multiplexing
- the network device 11 involved in the embodiment of the present application can be used to provide the terminal device 12 with a wireless communication function.
- the network device 11 may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like.
- the network device 11 may be a base transceiver station (BTS) in GSM or CDMA, or may be a base station (nodeB, NB) in WCDMA, or may be an evolved base station (eNB or LTE) in LTE. e-NodeB), and may be the corresponding device gNB in the 5G network.
- BTS base transceiver station
- NB base station
- eNB evolved base station
- e-NodeB evolved base station
- the foregoing apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device.
- the terminal device 12 may also be referred to as a user equipment (UE), a mobile station (MS), a mobile terminal, a terminal, etc., and the terminal The device 12 can communicate with one or more core networks via a radio access network (RAN), for example, the terminal device 12 can be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc.
- RAN radio access network
- the terminal device 12 can also be portable, pocket-sized, handheld, built-in or on-board.
- Mobile devices that exchange language and/or data with a wireless access network. The embodiment of the present application does not specifically limit it.
- the terminal device 12 and the network device 11 communicate via a physical channel.
- the network device 11 transmits a reference signal on the physical channel for the terminal device 12 to perform channel estimation.
- the network device 11 transmits a data signal on a physical channel, and the terminal device 12 receives the data signal and performs demodulation.
- the data signal and the reference signal appear in the same scheduling bandwidth, and the reference signal and the data signal are time-division-frequency division multiplexed transmission in units of time-frequency resource particles.
- the reference signal may include specific categories for a variety of different uses, for example, may include CSI-RS for acquiring channel state information and DMRS for demodulation, and the like. Any of the above reference signals having a specific purpose has a certain time-frequency resource pattern.
- the network device 11 and the terminal device 12 will widely use multi-antenna technology.
- beamforming techniques will be employed for the transmission of reference signals and the transmission of data signals.
- the semi-open loop multi-antenna transmission discussed in 3GPP R14 refers to a data transmission technique of performing RE-level open-loop precoding on the data channel based on the closed-loop pre-coded DMRS.
- the precoding matrix P 1 of the DMRS can be determined based on the channel feedback information of the terminal device, and thus the precoding matrix P 2 (j) on the jth RE on the data channel is equal to the precoding matrix P 1 of the DMRS in the resource block multiplied by Open-loop precoding matrix P which is Open loop precoding matrix on each RE It is inconsistent.
- a plurality means two or more.
- "and/or” describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
- the character "/" generally indicates that the contextual object is an "or" relationship.
- LTE As a long-term evolution standard, LTE enables the research and commercialization of new technologies for terrestrial mobile communication networks to be carried out smoothly.
- LTE R13 full-dimension multi-antenna (FD-MIMO) technology is introduced, that is, horizontal and vertical dimension beamforming is performed simultaneously on the network device side by means of a 2-dimensional antenna array.
- FD-MIMO full-dimension multi-antenna
- This performs corresponding precoding codebook enhancements, feedback flow enhancements, and the like, and these enhancements significantly increase cell capacity.
- the 2D beamforming makes the LTE R13 precoded codebook significantly larger than that of LTE R12, and the feedback process is more complicated. Therefore, the precoding feedback period of LTE R13 is long, and it can only work in relatively static mode.
- the open-loop-3D-MIMO scheme has become an important issue for LTE R14.
- LTE R8 Although some open-loop transmission modes for high-speed motion scenarios have been defined, such as transmission mode 2 transmit diversity and transmission mode, 3 large cyclic delay transmissions. Since the channel estimation depends on the reference signal at the cell level, in the above two transmission modes, only the signal transmission of only 4 antennas is allowed at the maximum, and the vertical dimension beamforming cannot be effectively performed to improve the cell capacity. Therefore, in LTE R14, a vertical dimension beamforming scheme similar to LTE R13, that is, an open-loop-FD-MIMO scheme, needs to be defined for a high-speed motion scenario.
- SFBC transmission requires two pairs of two REs with a frequency domain span of no more than three subcarriers in the same OFDM symbol and the same PRB.
- the SFBC transmission discussed in LTE R14 uses DMRS as the reference signal. Considering the time-frequency resources occupied by the DMRS, during the RE pairing process of the SFBC, there may be resource particles that cannot be paired, that is, isolated resource particles.
- FIG. 2 is a schematic diagram showing the location of isolated resource particles that appear when only DMRS is configured in the PRB.
- one row represents one subcarrier
- one column represents one OFDM symbol
- the twelve subcarriers constitute one physical resource block PRB.
- isolated resource particles (isolated RE) appear at positions corresponding to the 12th subcarrier, 6, 7, 13, and 14 OFDM symbols.
- the location and frequency of the isolated resource particles change according to the RE pairing rule in the SFBC defined above, even for a reference signal configuration. There are many possibilities for the location of isolated resource particles.
- the isolated resource particle may be brought by the 2-port CSI-RS.
- the processing flow in the existing LTE R10 is specifically as follows: In the SFBC transmission in the LTE R10, the terminal device first determines whether the current OFDM symbol is used, and if the current OFDM symbol is used, in the resource mapping, the entire mapping is performed. OFDM symbol, otherwise the OFDM symbol is directly discarded, and the entire OFDM symbol is not mapped at the time of resource mapping.
- Figure 3 shows the RE pairing rules for SFBC in LTE R10. In LTE R10, referring to FIG. 3, based on SFBC-based RE pairing, the following rules are defined:
- the two REs participating in the SFBC pairing must be from the same OFDM symbol
- the two REs participating in the SFBC pairing must be within the same physical resource block PRB;
- the two REs participating in the SFBC pairing must span a maximum of 3 subcarriers, that is, there are at most 1 subcarrier between the two paired REs.
- the two data signals RE in (a) of FIG. 3 and (b) of FIG. 3 can implement SFBC pairing, and (c) in FIG. 3 and FIG.
- the two data signals RE in (d) cannot complete the SFBC pairing.
- some data signals RE cannot find their own SFBC pair, and these data signals RE are isolated REs.
- Step 1 Determine whether the resource particles used for the CSI-RS are removed from one PRB within the current OFDM symbol and within the scheduling bandwidth, and whether the number of remaining resource particles is an even number. If yes, the second step is performed. Otherwise, it indicates that there is an isolated RE in the current OFDM symbol, and therefore, the resource mapping in the current OFDM symbol is suspended.
- Step 2 When the CSI-RS crosses more than two consecutive subcarriers, it is judged whether the resource particles cannot be paired under the SFBC. If so, the resource mapping in the current OFDM symbol is suspended, and if not, the resource particle pairing and the SFBC resource mapping are performed.
- the terminal device may determine, by using the foregoing determining criterion, whether the current OFDM symbol satisfies the condition of resource mapping. When it is satisfied, resource mapping and decoding are performed, thereby reducing the implementation complexity of the terminal device.
- the above solution has the following drawbacks: First, in the R14, when the PDSCH adopts transmit diversity transmission, the scheduled PRB includes not only the CSI-RS but also Includes DMRS. Under the coexistence of two kinds of reference signals RS, if the pairing rule of SFBC is unchanged, the isolated RE is more complicated. At this time, the above search and processing of isolated resource particles cannot be used to confirm whether the current OFDM symbol is used for resource mapping. Matches the rate. Second, in R14, the DMRS also brings an isolated RE, and the DMRS may exist in each subframe. In this case, if the entire OFDM symbol that does not satisfy the mapping condition in R10 is directly discarded, the resource will be wasted.
- LTE R14 since a new aperiodic CSI-RS and a part of the aperiodic CSI-RS are dynamically activated, and the number of periodic CSI-RSs is also significantly increased, compared to LTE R10, CSI -RS and The problem of isolated REs brought about by DMRS may be more complicated, and there may be cases where the location of the isolated RE is ambiguous.
- Figure 4 is a schematic diagram of the distribution of ambiguous resource particles.
- resource particles on the fourth subcarrier and resource particles on the eighth subcarrier can perform SFBC pairing with resource particles on the seventh subcarrier. Therefore, in (a) of FIG. 4, the isolated RE may be the sixth and seventh OFDM symbols, the resource particles on the fourth subcarrier, or the sixth and seventh OFDM symbols, and the eighth sub The resource particles on the carrier, that is, the location of the isolated RE may be disambiguated.
- the resource particles on the sixth and seventh OFDM symbols there is a possibility of pairing resource particles on the sixth and seventh OFDM symbols: the first possibility, the resource particles on the second subcarrier and the third subcarrier The resource particles implement SFBC pairing, and the resource particles on the seventh subcarrier and the resource particles on the eighth subcarrier implement SFBC pairing, when the resource particles on the ninth subcarrier become isolated REs; the second possibility, the second subcarrier The upper resource particles need to implement SFBC pairing with the resource particles on the third subcarrier, and the resource particles on the ninth subcarrier and the resource particles on the eighth subcarrier implement SFBC pairing, and the resource particles on the seventh subcarrier become An isolated RE; a third possibility, the resource particles on the ninth subcarrier and the resource particles on the eighth subcarrier implement SFBC pairing, and the resource particles on the seventh subcarrier and the resource particles on the fifth subcarrier implement SFBC pairing, At this time, the resource particles on the second subcarrier become isolated REs.
- the isolated RE may be a resource particle on the second subcarrier, or may be a resource particle on the seventh subcarrier, or may be a resource particle on the ninth subcarrier.
- isolated REs defined as polysemy.
- the embodiment of the present application provides a data transmission method and apparatus, for determining a hybrid configuration problem of any reference signal configured in a transmission subframe, by determining the location of the isolated resource particle and the isolated resource particle in the current reference signal configuration in the SFBC transmission.
- Data transmission scheme to achieve resource mapping and rate matching in SFBC transmission, avoiding waste of resources.
- FIG. 5 is a schematic flowchart diagram of Embodiment 1 of a data transmission method provided by the present application.
- the embodiments of the present application are applicable to all terminals and base stations based on the LTE standard, and the LTE baseband transceiver module of the terminal and the base station will adopt the technical solution of the embodiment of the present application. Therefore, in this embodiment, the first device may be a terminal, or may be a base station, which may actually need to be determined, which is not limited in this embodiment.
- the data transmission method may include the following steps:
- Step 51 The first device determines a first resource set and a second resource set in the first transmission subframe.
- the first resource set is a resource particle set remaining after all the resource particles used for data transmission in the first transmission subframe are paired according to the first pairing rule, and the second resource set is used in all the first transmission subframes.
- the resource particles of the data transfer complete the paired resource particle set based on the first pairing rule.
- the first pairing rule includes: the paired resource particles belong to the same time domain unit, the same frequency domain unit, and a maximum of three subcarriers.
- the frequency domain unit includes: a frequency domain width of one or more physical resource blocks, and the time domain unit includes: one or more OFDM symbols.
- the frequency domain unit includes, but is not limited to, a frequency domain width of one or more physical resource blocks.
- the frequency domain unit may be a subband with the same DMRS precoding matrix P1.
- the time domain unit includes, but is not limited to, one or more OFDM symbols. The definition and range of the frequency domain unit and the time domain unit can be determined according to actual conditions, and are not limited in this embodiment.
- the base station and the terminal in the communication system can respectively learn the location of the isolated RE set by using the first pairing rule.
- the set of isolated REs is defined as a first resource set
- a set of resource particles after removing the first resource set among all resource particles for data transmission in the first transmission subframe is defined as a second resource set.
- the resource particle RE on the kth subcarrier on a certain OFDM symbol is used for transmitting diversity PDSCH transmission, it needs to be able to find the PD+ transmission on the k+nth subcarrier in the same OFDM symbol.
- the resource particles are paired and transmitted, n ⁇ 3. If the kth subcarrier cannot find the resource particles for pairing, it is considered that the resource particles on the kth subcarrier cannot be paired and marked as isolated REs.
- k is a sequence number of a subcarrier corresponding to a resource particle for mapping a data channel, and k is a positive integer greater than or equal to 1.
- the first device may also implement configuration of the first resource set and the second resource set by receiving configuration instructions.
- the first resource set may pass RRC or MAC layer control element (MAC CE) or downlink control information ( Downlink control information, DCI) is activated.
- RRC radio resource management
- MAC CE MAC layer control element
- DCI downlink control information
- the subset can be activated by transmitting the corresponding number, that is, the ensemble is divided into the first resource set and the second resource set.
- the subset is semi-statically activated by RRC, and when the CSI-RS and the subset are simultaneously activated on some REs, the subset is covered by the CSI-RS, ie, the subset is removed activation.
- Step 52 The first device determines a data transmission manner on the first resource set and the second resource set.
- the first device can be configured according to the following rules: First, it can be left blank on the isolated RE, and no data is sent. At this time, the isolated RE is not considered in the rate matching; second, isolated RE When resource mapping is performed by using spatial time block coding (STBC), it is first mapped to normal OFDM symbols and then mapped to STBC-encoded OFDM symbols. Third, SFBC pairing is not performed on isolated REs. Use a single port for transmission.
- STBC spatial time block coding
- the first device determines, according to the characteristics of the transmission mode, the data transmission manners on the first resource set and the second resource set, respectively. That is, the first device determines that the transmission mode on the second resource set is a transmit diversity transmission of the space frequency block code, and determines that the transmission mode on the first resource set is no transmission data or space time block code transmission.
- the first device determines that the transmission mode on the second resource set is a transmit diversity transmission of the space frequency block code, and includes: in the transmit diversity transmission of the SFBC, the first device passes each antenna port of the multiple antenna ports.
- the transport symbols encoded by the space-frequency block code are mapped to the physical resources, they are sequentially mapped to all the resource particles in the second resource set, thereby ensuring that the resource mapping satisfies the SFBC mapping rule.
- the first device determines that the transmission mode on the first resource set is a space time block code transmission, including: the first device sequentially or multiple times before or after the resource mapping of the transmission symbol corresponding to the space frequency block code encoding The transmission symbols encoded by the space time block code on each of the antenna ports are mapped onto all resource particles in the first resource set.
- the first device determines that the transmission mode on the first resource set is not transmitting data, and the first device determines that all resource particles on the first resource set do not perform mapping of any transmission symbols.
- Step 53 The first device transmits the first transmission subframe to the second device according to the determined data transmission manner. The data or the data transmitted by the second device on the first transmission subframe.
- the first device determines the transmission mode of all the resource particles used for data transmission in the first transmission subframe, it notifies the second device to the determined data transmission manner, so that the first device and the first device
- the second device can implement data transmission by using a determined data transmission manner, that is, the first device sends data to the second device by using the first transmission subframe or receives the second device according to the determined data transmission manner. Transmit data sent on a sub-frame.
- the second device cannot receive the data information from the first resource set in the first transmission subframe.
- the first device sends the data to the second device by using the transmission mode of the space-time block code on the first resource set or the transmission mode of the space-frequency block code on the second resource set, correspondingly, the second device follows The transmission mode of the first device receives data from the first resource set and the second resource set in the first transmission subframe, respectively.
- the first device separately Receiving, according to a data transmission manner of the second device, data sent by the second device on the first resource set and the second resource set in the first transmission subframe.
- the first device determines a first resource set and a second resource set in the first transmission subframe, where the first resource set is all resources used for data transmission in the first transmission subframe.
- the particle is based on the remaining resource particle set after the first pairing rule is paired, and the second resource set is a resource particle set for all the resource particles used for data transmission in the first transmission subframe to be paired according to the first pairing rule, and the first device determines a data transmission manner on a resource set and a second resource set, and transmitting data to the second device by using the first transmission subframe or receiving data sent by the second device on the first transmission subframe according to the determined data transmission manner.
- the first device can determine the locations of the first resource set and the second resource set, and determine the data transmission manners on the different resource sets respectively, thereby ensuring that the SFBC transmission can be utilized to the maximum extent under the mixed reference signal configuration.
- the physical layer resources on the first transmission subframe avoid resource waste.
- the foregoing step 51 (the first device determines the first resource set and the second resource set in the first transmission subframe) may be implemented in the following possible manner, such as Figure 6 shows.
- FIG. 6 is a schematic flowchart diagram of Embodiment 2 of a data transmission method provided by the present application. As shown in FIG. 6, in the embodiment of the present application, the foregoing step 51 may include the following steps:
- Step 61 The first device sequentially determines, in a preset order, whether all resource particles used for data transmission in the first transmission subframe satisfy the first pairing rule.
- one frequency domain unit and one time domain unit may be first determined, so that the frequency domain unit and the time domain are All the resource particles in the unit start from the first subcarrier number corresponding to the resource particles used to map the data channel, and confirm whether each resource particle satisfies the first pairing rule one by one, that is, each resource particle belongs to one by one.
- the first resource collection is also the second resource collection.
- Step 62 When the resource particles for mapping the data channel on the kth subcarrier and the resource particles for mapping the data channel on the k+n subcarrier satisfy the first pairing rule, the first device determines the kth subcarrier and The resource particles for mapping the data channel on the k+n subcarriers all belong to the second resource set.
- n is a positive integer less than 3
- k is a sequence number of a subcarrier corresponding to a resource particle for mapping a data channel
- k is a positive integer greater than or equal to 1.
- the two may perform SFBC pairing, indicating that the resource segment
- the resource particles for mapping the data channel on the k subcarriers and the resource particles for mapping the data channel on the k+n subcarriers do not become isolated REs, that is, the first device determines the kth subcarrier and the k+n
- the resource particles used to map the data channel on each subcarrier belong to the second resource set.
- the first device completes the judgment of the set of resource particles used to map the data channel on the kth subcarrier, set k to the subcarrier number corresponding to the resource particle used for mapping the data channel, and repeat The above judging process until the resource particle determination for mapping the data channel on the last subcarrier in the first transmission subframe ends.
- Step 63 The first device determines that all the resource particles except the second resource set in the resource particles for data transmission in the first transmission subframe are the first resource set.
- the resource particles that can implement the SFBC pairing are classified into the second resource set, and then the first transmission subframe is All the resource particles in the resource particles used for data transmission that cannot implement SFBC pairing are classified into the first resource set.
- the first resource set is the resource particle used for data transmission in the first transmission subframe. A collection of all resource particles outside of the two resource collections.
- the second device that is to be in data communication with the first device also determines the first resource set on the first transmission subframe according to the determining step of steps 61 to 63. And the second resource set, so that the first device and the second device can implement data communication in the same data transmission manner.
- the method may further include the following step 62a.
- Step 62a After the first device completes the determination of all resource particles in all the time domain units in the preset frequency domain unit in the first transmission subframe, the first device determines the determination result of each resource particle in the preset frequency domain unit. Copies to other frequency domain units in the first transmission subframe.
- the frequency domain unit in the first transmission subframe satisfies the following two conditions: the configuration of the demodulation reference signal and the channel state information reference signal in each frequency domain unit is the same, and the precoding matrix of the demodulation reference signal is the same.
- the first device may determine, by dividing the resource particles on the first transmission subframe into multiple frequency domain units and multiple time domain units. For example, after the first device completes the determination of all resource particles in the preset time domain unit on the first transmission subframe, it may switch to the next time domain unit, and repeat the above determination process until all time domain units in the first transmission subframe. The determination of all resource particles within is ended.
- the resources in the preset frequency domain unit may be The result of determining whether the particle belongs to the first resource set is copied to other frequency domain units.
- the frequency domain unit capable of adopting the method described in step 62a must satisfy the following two conditions: that is, the configuration of the reference signals in each frequency domain unit is completely consistent (ie, demodulation reference signal and channel state information reference signal).
- the configuration positions are the same, and the precoding matrix of the demodulation reference signal is the same.
- each frequency domain unit is a subband having the same DMRS precoding matrix.
- step 62a By using the method described in step 62a, the determination complexity of the first device can be greatly reduced, the determination speed is improved, and the efficiency is high.
- the first device determines a first resource set in the first transmission subframe and When the second resource is set, the first device may sequentially determine, according to a preset sequence, whether all resource particles used for data transmission in the first transmission subframe satisfy the first pairing rule, and the resource used for mapping the data channel on the kth subcarrier.
- the resource particles for mapping the data channel on the k+n subcarriers satisfy the first pairing rule, determining that resource particles for mapping the data channel on the kth subcarrier and the k+n subcarrier belong to the second resource
- the technical solution can accurately divide all resource particles in the first transmission subframe into a first resource set and a second resource set, which lays a foundation for accurate transmission of subsequent data.
- FIG. 7 is a schematic flowchart of a first device confirming a first resource set and a second resource set.
- FIG. 8 is a schematic diagram of the determination result of the isolated RE included in the first resource set in FIG. 7.
- This embodiment describes the first device as a terminal.
- the physical resource block includes 12 subcarriers, and each subcarrier is considered to be one RE, that is, the physical resource block includes 12 REs.
- Step 701 Determine whether the kth RE is the reference signal RE. If yes, step 702 and step 711 are performed in sequence, and if no, step 703 is performed.
- the kth RE is the reference signal RE, it means that it can neither perform SFBC pairing nor mark it as an isolated RE, so k+1 is assigned to k, and the physical is not exceeded in the k+1th RE.
- the k+1th RE is judged. If the kth RE is not the reference signal RE, then go to step 703 for further judgment.
- Step 703 Determine whether the k+1th RE exceeds the boundary of the physical resource block. If yes, go to step 707. If no, go to step 704.
- the k+1th RE exceeds the boundary of the physical resource block, it means that the kth RE is already the last RE, and there is no possibility that the RE is paired with it, so it is determined that the kth RE is an isolated RE, and the determination ends. If the k+1th RE does not exceed the boundary of the physical resource block, the determination is continued.
- Step 704 Determine whether the k+1th RE is the reference signal RE. If yes, go to step 705. If no, go to step 706 and step 711 in sequence.
- the next step of determining is performed. If the k+1th RE is not the reference signal RE, it indicates that the kth RE and the k+1th RE can complete the SFBC pairing. Assign k+2 to k and determine if the k+2 RE exceeds the boundary of the physical resource block.
- Step 705 Determine whether the k+2th RE exceeds the boundary of the physical resource block. If yes, go to step 707. If no, go to step 708.
- the k+2 REs exceed the boundary of the physical resource block, meaning that the kth RE is already the last RE, it is impossible to have the RE and the pairing thereof, so it is determined that the kth RE is an isolated RE, and it is determined. End. If the k+1th RE does not exceed the boundary of the physical resource block, the determination is continued.
- Step 707 Determine that the kth RE is an isolated RE.
- Step 708 Determine whether the k+2th RE is the reference signal RE. If yes, step 709 and step 710 are performed in sequence, and if not, step 710 is directly executed.
- the k+2th RE is the reference signal RE
- the kth RE can no longer be compared with the RE with a distance less than 3 subcarriers.
- the pairing is completed, so the kth RE is marked as an isolated RE. If the k+2th RE is not the reference signal RE, the kth RE and the k+2th RE may complete pairing. Further, after the above steps, k+3 is assigned to k, and it is determined whether the k+3th RE exceeds the boundary of the physical resource block.
- Step 709 Mark the kth RE as an isolated RE.
- Step 711 Determine whether k at this time has exceeded the boundary of the physical resource block. If yes, the process ends. If no, the process proceeds to step 701 to re-execute the above-described determination process.
- the position of the isolated RE is determined as shown in (a) of FIG. 8, and correspondingly, in (b) of the above FIG.
- the position of the RE is determined as shown in (b) of FIG.
- the foregoing step 51 (the first device determines the first resource set and the second resource set in the first transmission subframe) may also be implemented in the following possible manner. Specifically, as shown in Figure 9.
- FIG. 9 is a schematic flowchart diagram of Embodiment 3 of a data transmission method provided by the present application.
- FIG. 10 is a first resource set and a second resource set determined by the method of the embodiment shown in FIG. 9.
- the foregoing step 51 may include the following steps:
- Step 91 The first device determines a complete resource set in the first transmission subframe.
- the resource ensemble includes a plurality of resource subsets, each resource subset includes one or more resource particles, and each resource particle has a unique identification sequence number.
- the first device first determines, according to the configured position of the reference signal, that the reference signal may affect several symbols of the SFBC pairing. Referring to Figure 10, the reference signal may affect only four symbols (5, 6, 12, 13). Second, the first device numbers all subsets of physical resource blocks.
- the first device numbers all the subsets of the physical resource blocks
- the following two methods may be used.
- the first mode is that the first device numbers all the physical resource pairs of the data channel according to the symbols that the reference signal may affect.
- the second mode is that the first device numbers all the physical resource pairs according to the symbols that the reference signal may affect.
- the resource complete set of the first transmission subframe determined by the first device includes 9 resource subsets, and the schematic diagram of the resource complete set is specifically shown in FIG. 10( a ), and the numbers are as follows: :
- the resource collection of the first transmission subframe determined by the first device includes 12 A subset of resources, the schematic diagram of the complete set of resources at this time is specifically shown in Figure (c), the numbers are as follows:
- Step 92 The first device receives the first configuration signaling sent by the second device, where the first configuration signaling includes an identification sequence number of one or more resource subsets.
- the first configuration command sent by the second device is received, and the first device may be configured according to one or more resources included in the first configuration signaling.
- the identification number of the set determines the first resource set and the second resource set.
- the configuration of the base station is stronger than that of the terminal.
- the first device may be a terminal
- the second device may be a base station.
- the first configuration signaling may be semi-static configuration signaling.
- the semi-static configuration signaling may include, but is not limited to, radio resource management signaling defined in an LTE system.
- the semi-static configuration signaling may further include a period of the first resource set and a subframe offset condition.
- the semi-static configuration signaling may further include a period and a subframe offset condition of each resource subset in the first resource set.
- a dynamically configured reference signal may appear in the first resource set configured according to the semi-static configuration signaling. At this time, resource particles that have been configured as reference signals should be excluded from the first resource set.
- the first configuration signaling may also be dynamic configuration signaling.
- the dynamic configuration command includes, but is not limited to, an access control layer control cell, physical layer downlink control information, and the like defined in an LTE system.
- Step 93 The first device configures one or more resource subsets included in the first configuration instruction as the first resource set, and divides all the resource particles used for data transmission in the first transmission subframe except the first resource set.
- the collection of all resource particles except the one is configured as the second resource collection.
- the first device may activate the one or more resource subsets in the resource set according to one or more resource subsets included in the first configuration instruction, and configure the first device or the resource subset For the first resource set, correspondingly, all the resource particles except for the first resource set among the resource particles for data transmission in the first transmission subframe are configured as the second resource set.
- the method for numbering the resource ensemble in the first manner is used. If the identifier number of the resource subset included in the first configuration command is 9, as shown in (b) of FIG. 10, A device may activate a subset of resources "9: ⁇ (11,5), (11,6), (11,12), (11,13) ⁇ " in the full set of resources, that is, the identification number is 9 The subset of resources is configured as the first set of resources. Similarly, in the method of numbering the resource ensemble in the second manner, if the identifier number of the resource subset included in the first configuration command is 1, as shown in (d) of FIG. 10, the first device may complete the resource collection. The resource subset "1: ⁇ (1,5),(1,6),(1,12),(1,13) ⁇ ”) is activated, that is, the resource subset whose identification number is 1 is configured as the first resource. set.
- the first device when the first device determines the first resource set and the second resource set in the first transmission subframe, the first device first determines a complete resource set in the first transmission subframe.
- the resource ensemble includes a plurality of resource subsets, each resource subset includes one or more resource particles, and each resource particle has a unique identification sequence number, and secondly receives the first configuration signaling sent by the second device.
- the first configuration signaling includes an identifier number of one or more resource subsets, and finally configures one or more resource subsets included in the first configuration instruction as a first resource set, and the first transmission subframe
- a set of all resource particles except for the first resource set among all resource particles for data transmission is configured as a second resource set.
- the first device of the technical solution can determine the first resource set and the second resource set in the first transmission subframe, which lays a foundation for subsequently determining the data transmission method and realizing accurate data transmission.
- the foregoing step 51 (the first device determines the first resource set and the second resource set in the first transmission subframe) may also be implemented in the following possible manner. Specifically, as shown in FIG.
- FIG. 11 is a schematic flowchart diagram of Embodiment 4 of a data transmission method according to the present application.
- FIG. 12 is a first resource set and a second resource set determined by the method of the embodiment shown in FIG.
- the foregoing step 51 may include the following steps:
- Step 111 The first device receives the second configuration signaling sent by the second device, where the second configuration command is used to indicate a complete set of resources.
- the first device receives a second configuration signaling from the second device, where the second configuration signaling indicates a complete set of resources, and the content that is specifically indicated by the second configuration command includes:
- the entire resource set includes N resource subsets, and N is a positive integer greater than one;
- Each resource subset corresponds to a unique identification sequence number
- the second configuration signaling is similar to the first configuration instruction, where the second configuration signaling is semi-static configuration signaling.
- the semi-static configuration signaling may include, but is not limited to, the radio resource defined in the LTE system. Management signaling.
- the semi-static configuration signaling may further include a period and a subframe offset of the resource ensemble.
- the semi-static configuration signaling may further include a period and a subframe offset of each candidate resource subset in the resource ensemble.
- the second configuration signaling may also be dynamic configuration signaling.
- the dynamic configuration command includes, but is not limited to, an access control layer control cell, physical layer downlink control information, and the like defined in an LTE system.
- Step 112 The first device determines, according to the second configuration instruction, a resource ensemble in the first transmission subframe.
- the resource ensemble includes a plurality of resource subsets, each resource subset includes one or more resource particles, and each resource particle has a unique identification sequence number;
- the first device first determines, according to the received second configuration instruction, a set of isolated resource particles that may appear, that is, a complete set of resources.
- the resource ensemble indicated by the second configuration instruction includes four resource subsets, and the numbers are as follows:
- the resource ensemble indicated by the second configuration instruction also includes four resource subsets, and the numbers are as follows:
- Step 113 The first device receives the first configuration signaling sent by the second device, where the first configuration signaling includes an identification sequence number of one or more resource subsets.
- the first device receives the first configuration command sent by the second device.
- the specific manifestation of the first configuration instruction is consistent with that in the embodiment shown in FIG.
- the present embodiment is similar to the embodiment shown in FIG. 9. Generally, since the configuration capability of the base station is stronger than the terminal, in this embodiment, the first configuration command and the second configuration command are sent.
- the second device may be a base station, and correspondingly, the first device that receives the first configuration command and the second configuration command may be a terminal.
- Step 114 The first device configures one or more resource subsets included in the first configuration instruction as the first resource set, and divides all the resource particles used for data transmission in the first transmission subframe by the first resource set. The collection of all resource particles except the one is configured as the second resource collection.
- the first device may allocate the resource as shown in (b) of FIG.
- the subset of resources in the ensemble "3: ⁇ (11,5),(11,6) ⁇ ” and “4: ⁇ (11,12),(11,13) ⁇ ” is activated, that is, the identification number is
- the resource subsets of 3 and 4 are configured as a first resource set.
- the first device may use the resource as shown in (b) of FIG.
- the subset of resources in the ensemble "1: ⁇ (1,5),(1,6) ⁇ ” and “4: ⁇ (11,12),(11,13) ⁇ ” are activated, and the identification numbers are 1 and 4
- the subset of resources is configured as the first set of resources.
- the first device when the first device determines the first resource set and the second resource set in the first transmission subframe, the first device receives the second configuration signaling sent by the second device, according to the first a configuration instruction, in the first transmission subframe, determining a resource ensemble, the resource ensemble comprising a plurality of resource subsets, each resource subset
- the first device further receives the first configuration signaling sent by the second device, where the first configuration signaling includes one or more resources, including one or more resource particles, and each resource particle has a unique identification sequence number.
- the identification sequence number of the subset such that the first device configures one or more resource subsets included in the first configuration instruction as the first resource set, and removes all resource particles used for data transmission in the first transmission subframe.
- a collection of all resource particles other than the first resource set is configured as a second resource set.
- the first device can also accurately determine the first resource set and the second resource set in the first transmission subframe, which lays a foundation for determining the data transmission method and realizing accurate data transmission.
- FIG. 13 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application.
- the data transmission device is integrated in the first device.
- the data transmission apparatus of this embodiment may include: a processing module 1301 and a transceiver module 1302.
- the processing module 1301 is configured to determine a first resource set and a second resource set in the first transmission subframe.
- the first resource set is a resource particle set remaining after the resource particles for data transmission in the first transmission subframe are paired according to the first pairing rule, and the second resource set is the first transporter. All resource particles for data transmission within the frame complete the paired resource particle set based on the first pairing rule.
- the processing module 1301 is further configured to determine a data transmission manner on the first resource set and the second resource set.
- the transceiver module 1302 is configured to send data to the second device by using the first transmission subframe or receive data sent by the second device on the first transmission subframe according to the determined data transmission manner.
- the first pairing rule includes: the paired resource particles belong to the same time domain unit, the same frequency domain unit, and a maximum of three subcarriers.
- the frequency domain unit includes: a frequency domain width of one or more physical resource blocks, where the time domain unit includes: one or more OFDM symbols.
- the processing module 1301 when the processing module 1301 determines the first resource set and the second resource set in the first transmission subframe, the processing module 1301 is specifically configured to sequentially determine the first transmission subframe according to a preset sequence. Whether all of the resource particles for data transmission satisfy the first pairing rule, and the resource particles for mapping the data channel on the kth subcarrier and the resource particles for mapping the data channel on the k+n subcarriers satisfy Determining, by the first pairing rule, that resource particles for mapping the data channel on the kth subcarrier and the k+n subcarriers belong to the second resource set, and determining the first transmission subframe All of the resource particles in the resource for data transmission except the second resource set are the first resource set;
- n is a positive integer less than 3
- the k is a sequence number of a subcarrier corresponding to a resource particle used for mapping a data channel
- the k is a positive integer greater than or equal to 1.
- the processing module 1301 is further configured to complete all the time in the preset frequency domain unit in the first transmission subframe. After determining the resource particles in the domain unit, the determination result of each resource particle in the preset frequency domain unit is copied to other frequency domain units in the first transmission subframe.
- the frequency domain unit in the first transmission subframe satisfies the following two conditions: the configuration of the demodulation reference signal and the channel state information reference signal in each frequency domain unit is consistent, and the precoding of the demodulation reference signal is performed.
- the matrix is the same.
- the processing module 1301 when the determining, by the processing module 1301, the first resource set and the second resource set in the first transmission subframe, the processing module 1301 is specifically configured to determine one in the first transmission subframe.
- the resource ensemble includes a plurality of resource subsets, each resource subset includes one or more resource particles, and each resource particle has a unique identification sequence number, and receives the first a configuration signaling, the first configuration signaling includes an identification sequence number of one or more resource subsets, and configuring one or more resource subsets included in the first configuration instruction as the first And a set of resources, wherein all the resource particles except for the first resource set in the resource particles for data transmission in the first transmission subframe are configured as the second resource set.
- the processing module 1301 when the processing module 1301 determines the first resource set and the second resource set in the first transmission subframe, the processing module 1301 is specifically configured to receive the second configuration information sent by the second device.
- the second configuration instruction is used to indicate a resource ensemble, and according to the second configuration instruction, a resource ensemble is determined in the first transmission subframe, where the resource ensemble includes multiple resource subsets.
- Each resource subset includes one or more resource particles, and each resource particle has a unique identification sequence number, and receives the first configuration signaling sent by the second device, where the first configuration signaling includes 1
- One or more resource subsets included in the first configuration instruction are configured as the first resource set, and all of the first transmission subframes are used for A set of all resource particles other than the first resource set in the resource particles of the data transmission is configured as the second resource set.
- the processing module 1301 when the determining, by the processing module 1301, that the transmission mode on the second resource set is a transmit diversity transmission of a space frequency block code, the processing module 1301 is configured to be used on each of the multiple antenna ports.
- the transmission symbols encoded by the space frequency block code are mapped to the physical resources, they are sequentially mapped to all the resource particles in the second resource set.
- the processing module 1301 when the determining, by the processing module 1301, that the transmission mode on the first resource set is not transmitting data or space-time block code transmission, specifically, determining, on the first resource set, All resource particles do not map any transmission symbols or the first device sequentially maps the transmission symbols encoded by the space time block code on each of the plurality of antenna ports onto all resource particles in the first resource set.
- each module of the above device is only a division of a logical function, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated.
- these modules can all be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by hardware.
- the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above determination module.
- the implementation of other modules is similar.
- all or part of these modules can be integrated or implemented independently.
- the processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
- the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASICs), or one or more numbers A digital singal processor (DSP), or one or more field programmable gate arrays (FPGAs).
- ASICs application specific integrated circuits
- DSP digital singal processor
- FPGAs field programmable gate arrays
- the processing component can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program code.
- these modules can be integrated and implemented in the form of a system-on-a-chip (SOC).
- SOC system-on-a-chip
- the computer program product includes one or more computer instructions.
- the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
- the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
- the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
- the usable medium may be a magnetic medium, (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
- FIG. 14 is a schematic structural diagram of still another data transmission apparatus according to an embodiment of the present application.
- the data transmission device is integrated in the first device.
- the data transmission apparatus of this embodiment may include a processor 1401 and a transceiver 1402.
- the data transmission device may further include a memory for storing execution instructions of the processor 1401.
- the transceiver 1402 may be implemented by an independent function transmitter and a receiver, and may be implemented by using an antenna or the like, which is not limited by the embodiment of the present application.
- the processor 1401 and the transceiver 1402 are configured to execute a computer to execute instructions to cause the data transmission device to perform the various steps of the above data transmission method.
- the processing module 1301 corresponds to the processor 1401
- the transceiver module 1302 corresponds to the transceiver 1402 and the like.
- the data transmission method and device provided by the embodiments of the present application are applicable to a base station and a terminal based on the LTE standard in a communication system.
- the PDSCH uses SFBC transmission at the RE level
- the PRB of the scheduling bandwidth has DMRS and/or CSI-RS
- the base station and the terminal have a common understanding of the locations of the isolated resource particles in the PRB, and respectively determine the
- the data transmission mode on the first resource set and the second resource set in a transmission subframe enables the base station and the terminal to implement rate matching when performing resource mapping, so that physical layer resources can be utilized to the maximum extent, and resource waste is avoided.
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Abstract
Description
Claims (18)
- 一种数据传输方法,其特征在于,包括:第一设备确定第一传输子帧内的第一资源集合和第二资源集合,所述第一资源集合为所述第一传输子帧内所有用于数据传输的资源粒子基于第一配对规则配对后剩余的资源粒子集合,所述第二资源集合为所述第一传输子帧内所有用于数据传输的资源粒子基于所述第一配对规则完成配对的资源粒子集合;所述第一设备确定所述第一资源集合和所述第二资源集合上的数据传输方式;所述第一设备根据确定的所述数据传输方式利用所述第一传输子帧向第二设备发送数据或者接收第二设备在所述第一传输子帧上发送的数据。
- 根据权利要求1所述的方法,其特征在于,所述第一设备确定所述第一资源集合和所述第二资源集合上的数据传输方式,包括:所述第一设备确定所述第二资源集合上的传输方式为空频分组码的发射分集传输;所述第一设备确定所述第一资源集合上的传输方式为不传输数据或空时分组码传输。
- 根据权利要求1或2所述的方法,其特征在于,所述第一配对规则,包括:配对的两个资源粒子属于同一个时域单位、同一个频域单位、最多跨越3个子载波;所述频域单位,包括:1个或多个物理资源块的频域宽度,所述时域单位包括:1个或多个OFDM符号。
- 根据权利要求1~3任一项所述的方法,其特征在于,所述第一设备确定第一传输子帧内的第一资源集合和第二资源集合,包括:所述第一设备按照预设顺序依次判定所述第一传输子帧内所有用于数据传输的资源粒子是否满足所述第一配对规则;在第k个子载波上用于映射数据信道的资源粒子与第k+n个子载波上用于映射数据信道的资源粒子满足所述第一配对规则时,所述第一设备确定所述第k个子载波和所述第k+n个子载波上用于映射数据信道的资源粒子均属于所述第二资源集合,其中,所述n为小于3的正整数,所述k为用于映射数据信道的资源粒子对应的子载波的序号,所述k为大于或等于1的正整数;所述第一设备确定所述第一传输子帧内所有用于数据传输的资源粒子中除所述第二资源集合之外的所有资源粒子的集合为所述第一资源集合。
- 根据权利要求4所述的方法,其特征在于,所述方法还包括:在所述第一设备完成所述第一传输子帧中预设频域单位内、所有时域单位内的所有资源粒子的判定后,所述第一设备将所述预设频域单位上各个资源粒子的判定结果复制到所述第一传输子帧中的其他频域单位上;所述第一传输子帧中的频域单位满足如下两个条件:每个频域单位内解调参考信号和信道状态信息参考信号的配置一致、解调参考信号的预编码矩阵相同。
- 根据权利要求1~3任一项所述的方法,其特征在于,所述第一设备确定第一传输子帧内的第一资源集合和第二资源集合,包括:所述第一设备在所述第一传输子帧内确定出一个资源全集,所述资源全集中包括多个资源子集,每个资源子集包括1个或多个资源粒子,且每个资源粒子具有一个唯一的标识 序号;所述第一设备接收所述第二设备发送的第一配置信令,所述第一配置信令包含1个或多个资源子集的标识序号;所述第一设备将所述第一配置指令中包含的1个或多个资源子集配置为所述第一资源集合,将所述第一传输子帧内所有用于数据传输的资源粒子中除所述第一资源集合之外的所有资源粒子的集合配置为所述第二资源集合。
- 根据权利要求1~3任一项所述的方法,其特征在于,所述第一设备确定第一传输子帧内的第一资源集合和第二资源集合,包括:所述第一设备接收所述第二设备发送的第二配置信令,所述第二配置指令用于指示一个资源全集;所述第一设备根据所述第二配置指令,在所述第一传输子帧内确定出一个资源全集,所述资源全集中包括多个资源子集,每个资源子集包括1个或多个资源粒子,且每个资源粒子具有一个唯一的标识序号;所述第一设备接收所述第二设备发送的第一配置信令,所述第一配置信令包含1个或多个资源子集的标识序号;所述第一设备将所述第一配置指令中包含的1个或多个资源子集配置为所述第一资源集合,将所述第一传输子帧内所有用于数据传输的资源粒子中除所述第一资源集合之外的所有资源粒子的集合配置为所述第二资源集合。
- 根据权利要求2~7任一项所述的方法,其特征在于,所述第一设备确定所述第二资源集合上的传输方式为空频分组码的发射分集传输,包括:所述第一设备将多个天线端口中每个天线端口上经过空频分组码编码的传输符号映射到物理资源时,依次映射到所述第二资源集合中的所有资源粒子上。
- 根据权利要求2~7任一项所述的方法,其特征在于,所述第一设备确定所述第一资源集合上的传输方式为不传输数据或空时分组码传输,包括:所述第一设备确定所述第一资源集合上的所有资源粒子不进行任何传输符号的映射或所述第一设备依次将多个天线端口中每个天线端口上经过空时分组码编码的传输符号映射到第一资源集合中的所有资源粒子上。
- 一种数据传输装置,集成在第一设备中,其特征在于,所述装置包括:处理模块,用于确定第一传输子帧内的第一资源集合和第二资源集合,所述第一资源集合为所述第一传输子帧内所有用于数据传输的资源粒子基于第一配对规则配对后剩余的资源粒子集合,所述第二资源集合为所述第一传输子帧内所有用于数据传输的资源粒子基于所述第一配对规则完成配对的资源粒子集合;所述处理模块,还用于确定所述第一资源集合和所述第二资源集合上的数据传输方式;收发模块,用于根据确定的所述数据传输方式利用所述第一传输子帧向第二设备发送数据或者接收第二设备在所述第一传输子帧上发送的数据。
- 根据权利要求10所述的装置,其特征在于,所述处理模块在确定所述第一资源集合和所述第二资源集合上的数据传输方式时,具体用于确定所述第二资源集合上的传输 方式为空频分组码的发射分集传输,确定所述第一资源集合上的传输方式为不传输数据或空时分组码传输。
- 根据权利要求10或11所述的装置,其特征在于,所述第一配对规则,包括:配对的两个资源粒子属于同一个时域单位、同一个频域单位、最多跨越3个子载波;所述频域单位,包括:1个或多个物理资源块的频域宽度,所述时域单位包括:1个或多个OFDM符号。
- 根据权利要求10~12任一项所述的装置,其特征在于,所述处理模块在确定第一传输子帧内的第一资源集合和第二资源集合时,具体用于按照预设顺序依次判定所述第一传输子帧内所有用于数据传输的资源粒子是否满足所述第一配对规则,并在第k个子载波上用于映射数据信道的资源粒子与第k+n个子载波上用于映射数据信道的资源粒子满足所述第一配对规则时,确定所述第k个子载波和所述第k+n个子载波上用于映射数据信道的资源粒子均属于所述第二资源集合,确定所述第一传输子帧内所有用于数据传输的资源粒子中除所述第二资源集合之外的所有资源粒子的集合为所述第一资源集合;其中,所述n为小于3的正整数,所述k为用于映射数据信道的资源粒子对应的子载波的序号,所述k为大于或等于1的正整数。
- 根据权利要求13所述的装置,其特征在于,所述处理模块在确定第一传输子帧内的第一资源集合和第二资源集合时,还具体用于在完成所述第一传输子帧中预设频域单位内、所有时域单位内的所有资源粒子的判定后,将所述预设频域单位上各个资源粒子的判定结果复制到所述第一传输子帧中的其他频域单位上;所述第一传输子帧中的频域单位满足如下两个条件:每个频域单位内解调参考信号和信道状态信息参考信号的配置一致、解调参考信号的预编码矩阵相同。
- 根据权利要求10~12任一项所述的装置,其特征在于,所述处理模块在确定第一传输子帧内的第一资源集合和第二资源集合时,具体用于在所述第一传输子帧内确定出一个资源全集,所述资源全集中包括多个资源子集,每个资源子集包括1个或多个资源粒子,且每个资源粒子具有一个唯一的标识序号,接收所述第二设备发送的第一配置信令,所述第一配置信令包含1个或多个资源子集的标识序号,并将所述第一配置指令中包含的1个或多个资源子集配置为所述第一资源集合,将所述第一传输子帧内所有用于数据传输的资源粒子中除所述第一资源集合之外的所有资源粒子的集合配置为所述第二资源集合。
- 根据权利要求10~12任一项所述的装置,其特征在于,所述处理模块在确定第一传输子帧内的第一资源集合和第二资源集合时,具体用于接收所述第二设备发送的第二配置信令,所述第二配置指令用于指示一个资源全集,根据所述第二配置指令,在所述第一传输子帧内确定出一个资源全集,所述资源全集中包括多个资源子集,每个资源子集包括1个或多个资源粒子,且每个资源粒子具有一个唯一的标识序号,以及接收所述第二设备发送的第一配置信令,所述第一配置信令包含1个或多个资源子集的标识序号,将所述第一配置指令中包含的1个或多个资源子集配置为所述第一资源集合,将所述第一传输子帧内所有用于数据传输的资源粒子中除所述第一资源集合之外的所有资源粒子的集合配置为所述第二资源集合。
- 根据权利要求11~16任一项所述的装置,其特征在于,所述处理模块在确定所述第二资源集合上的传输方式为空频分组码的发射分集传输时,具有用于将多个天线端口中 每个天线端口上经过空频分组码编码的传输符号映射到物理资源时,依次映射到所述第二资源集合中的所有资源粒子上。
- 根据权利要求11~16任一项所述的装置,其特征在于,所述处理模块在确定所述第一资源集合上的传输方式为不传输数据或空时分组码传输时,具体用于确定所述第一资源集合上的所有资源粒子不进行任何传输符号的映射或所述第一设备依次将多个天线端口中每个天线端口上经过空时分组码编码的传输符号映射到第一资源集合中的所有资源粒子上。
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CN201780009971.4A CN108604950B (zh) | 2017-01-23 | 2017-02-27 | 数据传输方法及装置 |
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EP3681079B1 (en) * | 2017-09-08 | 2022-12-07 | Wilus Institute of Standards and Technology Inc. | Data transmission method and reception method for wireless communication system and device using same |
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CN102845011A (zh) * | 2010-02-23 | 2012-12-26 | 高通股份有限公司 | 信道状态信息参考信号 |
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