WO2018137215A1 - 物理下行共享信道覆盖增强方法、装置及系统 - Google Patents

物理下行共享信道覆盖增强方法、装置及系统 Download PDF

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Publication number
WO2018137215A1
WO2018137215A1 PCT/CN2017/072693 CN2017072693W WO2018137215A1 WO 2018137215 A1 WO2018137215 A1 WO 2018137215A1 CN 2017072693 W CN2017072693 W CN 2017072693W WO 2018137215 A1 WO2018137215 A1 WO 2018137215A1
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Prior art keywords
rbs
group
subframe
frequency domain
data
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PCT/CN2017/072693
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English (en)
French (fr)
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韩金侠
李振宇
李志军
任占阳
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华为技术有限公司
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Priority to PCT/CN2017/072693 priority Critical patent/WO2018137215A1/zh
Publication of WO2018137215A1 publication Critical patent/WO2018137215A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the present application relates to the field of communications, and in particular, to a physical downlink shared channel (PDSCH) coverage enhancement method and apparatus.
  • PDSCH physical downlink shared channel
  • the PDSCH coverage enhancement of the licensed frequency in the prior art is generally implemented by repeatedly transmitting the same data on multiple consecutive downlink subframes in the time domain, which continuously occupies the downlink channel.
  • the spectrum regulations require that each network element needs to perform a check before sending (LBT) before transmitting data, that is, detecting the channel first. It can be sent after being idle. And each time the channel is preempted, it can only transmit a maximum of a limited duration, for example, cannot exceed one transmission opportunity (TXOP) or maximum continuous occupied time (MCOT). Therefore, on the unlicensed frequency, the PDSCH cannot be repeatedly transmitted on consecutive downlink subframes. Therefore, the PDSCH coverage enhancement technology of the licensed frequency in the prior art is not applicable to the unlicensed frequency.
  • LBT check before sending
  • TXOP transmission opportunity
  • MCOT maximum continuous occupied time
  • the embodiment of the present application provides a physical downlink shared channel coverage enhancement method, device, and system, which are used to implement coverage enhancement of an unlicensed frequency PDSCH.
  • the embodiment of the present application provides a physical downlink shared channel coverage enhancement method, which is applied to an unlicensed spectrum.
  • the method includes: the network device first determining an R group resource block RB that carries the first data in the first subframe.
  • the number of RBs of each group of RBs in the R group is N, and R and N are both natural numbers and satisfy The number of RBs in the downlink resource of the first subframe;
  • the network device sends the first indication information to the terminal device, where the location of the R group RB in the first subframe is indicated in the first indication information;
  • the R group RBs in the first subframe transmit the first data to the terminal device.
  • the physical downlink shared channel coverage enhancement method provided by the embodiment of the present application transmits the first data by using the R group RBs in the first subframe, and each group of RBs is used to carry the first data, and is substantially repeatedly transmitted in the frequency domain of the PDSCH.
  • the same data is used to implement PDSCH coverage enhancement. Since frequency domain repetition is used, the number of time domain repetitions can be reduced, and even frequency domain repetition can be used, which is more suitable for unlicensed spectrum.
  • the R group RBs are distributed on different downlink frequency domain resources in the first subframe. This design makes it possible to implement PDSCH coverage enhancement using frequency domain repetition instead of time domain repetition.
  • the R group RBs are equally spaced on the downlink frequency domain resources of the first subframe.
  • the design makes the content of the first indication information sent less, and can ensure that the downlink PDSCH can transmit at full power.
  • the first indication information is downlink control information DCI
  • the downlink frequency domain resource of the first subframe includes J clusters, and each cluster includes Consecutive RBs, the same number of RBs in each cluster as a cross resource group
  • the DCI is specifically used to indicate the MCS level of the modulation and coding policy and the identifier K of the cross resource group.
  • the MCS level is used to indicate the MCS level of the first data
  • the identifier K of the cross resource group is used to indicate the R group RB occupation.
  • a cross resource group identified as K Both J and K are natural numbers.
  • the design provides a specific content of the first indication information.
  • the method further includes: adjusting the MCS level according to the transport block size TBS of the first data.
  • the design is more suitable for transmitting data packets with smaller block sizes. For example, when I TBS ⁇ 6, this method can not only obtain the coding gain on one RB, but also obtain the repetition gain by repeating R times.
  • the DCI is also used to indicate the number of RBs in each group of RBs.
  • the R group RBs are distributed in the downlink frequency of the first subframe according to the interval of RBs.
  • the foregoing method of the present application further includes: adjusting the number of RBs N of each group of RBs according to the TBS of the first data. This design provides the specific content of the other first indication information, while ensuring that the MCS level is always 0, which is especially suitable for scenarios with high transmission quality requirements.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the number of RBs between adjacent two groups of RBs I RB , the lowest Minimum RB index of a group of RBs in the frequency domain location
  • the R group RBs are distributed at equal intervals in the group on the downlink frequency domain resources of the first subframe.
  • the design provides a further specific content of the first indication information.
  • the R group RBs are continuously distributed on the downlink frequency domain resources of the first subframe. This design makes it possible to use the remaining RBs to achieve coverage enhancement in the frequency domain.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the lowest RB index of a group of RBs in the lowest frequency domain position.
  • the design provides a specific content of the further first indication information.
  • the first data is data that has been subjected to direct sequence spread spectrum.
  • the design uses frequency domain resources by spreading to achieve frequency domain repetition, and frequency domain diversity can also be obtained. Gain.
  • the first indication information is also used to indicate a spreading code sequence or a spreading code sequence index.
  • the design provides a specific content of the further first indication information.
  • a second aspect provides a physical downlink shared channel coverage enhancement method, which is applied to an unlicensed spectrum.
  • the method includes: the terminal device receives the first indication information from the network device, where the first indication information is used to indicate the first subframe.
  • the position of the R group resource block RB in the first subframe, each group of RBs is used to carry the first data, and the number of RBs of each group of RBs is N, R is the number of RBs in the downlink resource of the first subframe, and R and N are both natural numbers;
  • the terminal device receives the first data from the network device by using the R group RBs in the first subframe.
  • the physical downlink shared channel coverage enhancement method provided by the embodiment of the present application transmits the first data by using the R group RBs in the first subframe, and each group of RBs is used to carry the first data, and is substantially repeatedly transmitted in the frequency domain of the PDSCH.
  • the same data is used to implement PDSCH coverage enhancement. Since frequency domain repetition is used, the number of time domain repetitions can be reduced, and even frequency domain repetition can be used, which is more suitable for unlicensed spectrum.
  • the R group RBs are distributed on different downlink frequency domain resources in the first subframe. This design makes it possible to implement PDSCH coverage enhancement using frequency domain repetition instead of time domain repetition.
  • the R group RBs are equally spaced on the downlink frequency domain resources of the first subframe.
  • the design makes the content of the first indication information sent less, and can ensure that the downlink PDSCH can transmit at full power.
  • the first indication information is downlink control information DCI
  • the downlink frequency domain resource of the first subframe includes J clusters, and each cluster includes Consecutive RBs, the same number of RBs in each cluster as a cross resource group
  • the DCI is specifically used to indicate the MCS level of the modulation and coding policy and the identifier K of the cross resource group.
  • the MCS level is used to indicate the MCS level of the first data
  • the identifier K of the cross resource group is used to indicate the R group RB occupation.
  • a cross resource group identified as K Both J and K are natural numbers.
  • the design provides a specific content of the first indication information.
  • the design is more suitable for transmitting data packets with smaller block sizes. For example, when I TBS ⁇ 6, this method can not only obtain the coding gain on one RB, but also obtain the repetition gain by repeating R times.
  • the DCI is also used to indicate the number of RBs in each group of RBs.
  • the R group RBs are distributed in the downlink frequency of the first subframe according to the interval of RBs.
  • the number of RBs N of each group of RBs is adjusted according to the TBS of the first data.
  • the design provides another specific content of the first indication information, and ensures that the MCS level is always 0.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the number of RBs between adjacent two groups of RBs I RB , the lowest Minimum RB index of a group of RBs in the frequency domain location
  • the R group RBs are distributed at equal intervals in the group on the downlink frequency domain resources of the first subframe.
  • the design provides a further specific content of the first indication information.
  • the R group RBs are continuously distributed on the downlink frequency domain resources of the first subframe. This design makes it possible to use the remaining RBs to achieve coverage enhancement in the frequency domain.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the lowest RB index of a group of RBs in the lowest frequency domain position.
  • the design provides a specific content of the further first indication information.
  • the first data is data that has been subjected to direct sequence spread spectrum.
  • the design occupies more frequency domain resources by spreading, so that frequency domain repeated transmission is realized, and the gain of frequency domain diversity can also be obtained.
  • the first indication information is also used to indicate a spreading code sequence or a spreading code sequence index.
  • the design provides a specific content of the further first indication information.
  • the embodiment of the present application provides a network device, which is applied to an unlicensed spectrum, where the network device includes: a determining unit, configured to determine an R group resource block RB in the first subframe, where each group of RBs is used. Carrying the first data, the number of RBs in each group of RBs is N, For the number of RBs in the downlink resource of the first subframe, R and N are both natural numbers; the sending unit is configured to send the first indication information to the terminal device, where the first indication information is used to indicate that the R group RB is in the first subframe. The sending unit is further configured to send the first data to the terminal device by using the R group RBs in the first subframe.
  • the network device provided by the embodiment of the present application transmits the first data by using the R group RBs in the first subframe, and each group of RBs is used to carry the first data, and the PDSCH is implemented by repeatedly transmitting the same data in the frequency domain of the PDSCH.
  • Coverage enhancement Since frequency domain repetition is used, the number of time domain repetitions can be reduced, and even frequency domain repetition can be used, which is more suitable for unlicensed spectrum.
  • the R group RBs are distributed on different downlink frequency domain resources in the first subframe. This design makes it possible to implement PDSCH coverage enhancement using frequency domain repetition instead of time domain repetition.
  • the R group RBs are equally spaced on the downlink frequency domain resources of the first subframe.
  • the design makes the content of the first indication information sent less, and can ensure that the downlink PDSCH can transmit at full power.
  • the first indication information is downlink control information DCI
  • the downlink frequency domain resource of the first subframe includes J clusters, where each cluster includes Consecutive RBs, the same number of RBs in each cluster as a cross resource group
  • the DCI is specifically used to indicate the MCS level of the modulation and coding policy and the identifier K of the cross resource group.
  • the MCS level is used to indicate the MCS level of the first data
  • the identifier K of the cross resource group is used to indicate the R group RB occupation.
  • a cross resource group identified as K Both J and K are natural numbers.
  • the design provides a specific content of the first indication information.
  • the determining unit is further configured to adjust the MCS level based on the transport block size TBS of the first data.
  • the design is more suitable for transmitting data packets with smaller block sizes. For example, when I TBS ⁇ 6, this method can not only obtain the coding gain on one RB, but also obtain the repetition gain by repeating R times.
  • the DCI is also used to indicate the number of RBs in each group of RBs.
  • the R group RBs are distributed in the downlink frequency of the first subframe according to the interval of RBs.
  • the determining unit is further configured to adjust the number of RBs N of each group of RBs according to the TBS of the first data.
  • the design provides another specific content of the first indication information, and ensures that the MCS level is always 0.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the number of RBs between adjacent two groups of RBs I RB , the lowest Minimum RB index of a group of RBs in the frequency domain location
  • the R group RBs are distributed at equal intervals in the group on the downlink frequency domain resources of the first subframe.
  • the design provides a further specific content of the first indication information.
  • the R group RBs are continuously distributed on the downlink frequency domain resources of the first subframe. This design makes it possible to use the remaining RBs to achieve coverage enhancement in the frequency domain.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the lowest RB index of a group of RBs in the lowest frequency domain position.
  • the design provides a specific content of the further first indication information.
  • the first data is data that has been subjected to direct sequence spread spectrum.
  • the design occupies more frequency domain resources by spreading, so that frequency domain repeated transmission is realized, and the gain of frequency domain diversity can also be obtained.
  • the first indication information is also used to indicate a spreading code sequence or a spreading code sequence index.
  • the design provides a specific content of the further first indication information.
  • the embodiment of the present application provides a terminal device, which is applied to an unlicensed spectrum, where the terminal device includes: a receiving unit, configured to receive first indication information from the network device, where the first indication information is used to indicate the first sub- The position of the R group resource block RB in the frame in the first subframe, each group of RBs is used to carry the first data, and the number of RBs in each group of RBs is N.
  • R and N are both natural numbers; and the receiving unit is further configured to receive the first data from the network device by using the R group RBs in the first subframe.
  • the terminal device provided by the embodiment of the present application transmits the first data by using the R group RBs in the first subframe, and each group of RBs is used to carry the first data, and the PDSCH is implemented by repeatedly transmitting the same data in the frequency domain of the PDSCH.
  • Coverage enhancement Since frequency domain repetition is used, the number of time domain repetitions can be reduced, and even frequency domain repetition can be used, which is more suitable for unlicensed spectrum.
  • the R group RBs are distributed on different downlink frequency domain resources in the first subframe. This design makes it possible to implement PDSCH coverage enhancement using frequency domain repetition instead of time domain repetition.
  • the R group RBs are equally spaced on the downlink frequency domain resources of the first subframe.
  • the design makes the content of the first indication information sent less, and can ensure that the downlink PDSCH can transmit at full power.
  • the first indication information is downlink control information DCI
  • the downlink frequency domain resource of the first subframe includes J clusters, where each cluster includes Consecutive RBs, the same number of RBs in each cluster as a cross resource group
  • the DCI is specifically used to indicate the MCS level of the modulation and coding policy and the identifier K of the cross resource group.
  • the MCS level is used to indicate the MCS level of the first data
  • the identifier K of the cross resource group is used to indicate the R group RB occupation.
  • a cross resource group identified as K Both J and K are natural numbers.
  • the design provides a specific content of the first indication information.
  • the design is more suitable for transmitting data packets with smaller block sizes. For example, when I TBS ⁇ 6, this method can not only obtain the coding gain on one RB, but also obtain the repetition gain by repeating R times.
  • the DCI is also used to indicate the number of RBs in each group of RBs.
  • the R group RBs are distributed in the downlink frequency of the first subframe according to the interval of RBs.
  • the number of RBs N of each group of RBs is adjusted according to the TBS of the first data.
  • the design provides another specific content of the first indication information, and ensures that the MCS level is always 0.
  • the R group RBs are distributed at equal intervals in the group on the downlink frequency domain resources of the first subframe.
  • the R group RBs are continuously distributed on the downlink frequency domain resources of the first subframe. This design makes it possible to use the remaining RBs to achieve coverage enhancement in the frequency domain.
  • the first indication information is DCI
  • the DCI is specifically used to indicate the number of RBs in each group of RBs, the number of RB groups R, and the lowest RB index of a group of RBs in the lowest frequency domain position.
  • the design provides a specific content of the further first indication information.
  • the first data is data that has been subjected to direct sequence spread spectrum.
  • the design occupies more frequency domain resources by spreading, so that frequency domain repeated transmission is realized, and the gain of frequency domain diversity can also be obtained.
  • the first indication information is also used to indicate a spreading code sequence or a spreading code sequence index.
  • the design provides a specific content of the further first indication information.
  • an embodiment of the present application provides a network device, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when the network device In operation, the processor executes the computer-executed instructions stored in the memory to cause the network device to perform the physical downlink shared channel coverage enhancement method of any of the above aspects.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the network device, which is configured to perform the foregoing aspects for a network device. Program.
  • the embodiment of the present application provides a computer program, where the computer program includes instructions, when the computer program is executed by a computer, to enable the computer to perform the physical downlink shared channel coverage enhancement method according to any one of the foregoing second aspects. .
  • an embodiment of the present application provides a terminal device, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when the terminal device In operation, the processor executes the computer-executed instructions stored in the memory to cause the terminal device to perform the physical downlink shared channel coverage enhancement method of any of the above second aspects.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the terminal device, which includes a program designed to execute the foregoing aspect for the terminal device.
  • the embodiment of the present application provides a computer program, where the computer program includes instructions, when the computer program is executed by a computer, to enable the computer to perform the physical downlink shared channel coverage enhancement method according to any one of the foregoing second aspects. .
  • the embodiment of the present application provides a communication system, including the network device according to any of the foregoing aspects, and the terminal device according to any of the foregoing aspects.
  • FIG. 1 is a schematic diagram of coexistence of an LTE base station and a WIFI based on unlicensed frequency deployment in the prior art
  • FIG. 2 is a schematic diagram of channel occupation of a WIFI system and an LTE system on an unlicensed frequency point in the prior art
  • FIG. 3 is a schematic diagram of PDSCH channel coverage enhancement in an eMTC standard in the prior art
  • FIG. 4 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of hardware of a communication device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of a physical downlink shared channel coverage enhancement method according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of an example of downlink resource allocation according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of another downlink resource allocation example according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of still another example of downlink resource allocation according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of still another example of downlink resource allocation according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of still another example of downlink resource allocation according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of still another downlink resource allocation example according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of still another network device according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of another network device according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of still another terminal device according to an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of another terminal device according to an embodiment of the present application.
  • the network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
  • the embodiment of the present application can be applied to a time division duplexing (TDD) scenario or a frequency division duplexing (FDD) scenario.
  • TDD time division duplexing
  • FDD frequency division duplexing
  • the unlicensed frequency point is that different systems and individuals and different systems can be used to use the same frequency point.
  • the unlicensed frequency is mainly used by the wireless fidelity (WIFI) system, as shown in FIG.
  • WIFI wireless fidelity
  • each network element needs to perform LBT (for example, clear channel assessment (CCA), etc.) before transmitting data, that is, after detecting that the channel is idle.
  • LBT clear channel assessment
  • a TXOP or MCOT duration can be 10ms, 8ms, and so on. Therefore, although the system operating at unlicensed frequency can adopt the FDD system, that is, two unlicensed frequency points are used for uplink and downlink services respectively, but specific to an unlicensed frequency point, different systems use TDD to perform frequency resources. Reuse.
  • FIG. 2 a schematic diagram of channel occupation of the WIFI system and the LTE system on the unlicensed frequency point is shown.
  • ETSI European Telecommunications Standard Institute
  • Table 1 The regulatory limits for the frequency bands are shown in Table 1.
  • the maximum transmit power cannot exceed 23 dBm, and the maximum power spectral density cannot exceed 10 dBm/MHz.
  • one scheduling unit is usually a multi-user scheduling.
  • the uplink user transmission can be ensured by using the frequency resource discretization to fully utilize the full power transmission under the premise of satisfying the power spectrum, that is, the user uplink data can be transmitted as full power as possible.
  • the power is shared among multiple users. Therefore, the downlink single user cannot generally transmit power. Therefore, there is a problem that the uplink and downlink power of the user is inconsistent, and the downlink channel coverage is more limited.
  • the PDSCH channel is mainly used for transmitting service data, and may also transmit signaling.
  • the frequency domain resource location is indicated by a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) channel indication.
  • PDCH physical downlink control channel
  • EPDCCH enhanced physical downlink control channel
  • the resource allocation mode of the PDSCH of LTE is divided into three types, namely, type 0 (type 0), type 1 (type 1), and type 2 (type 2). For details, refer to the 3GPP TS 36.213 protocol.
  • an enhanced machine type communication (eMTC) standard is introduced, that is, a scheme of repeatedly transmitting the same PDSCH data at different times in a narrowband system to implement PDSCH channel coverage enhancement.
  • eMTC enhanced machine type communication
  • FIG. 3 after the narrowband physical downlink control channel (MPDCCH) is repeatedly transmitted at different times, the number of repeated transmissions of the PDSCH is indicated by the cross-subframe scheduling, so that the PDSCH is in multiple consecutive downlinks. Repeated transmission on the subframe.
  • the scheme requires that the downlink channel be continuously occupied, which is not applicable to the coverage enhancement of the unlicense spectrum.
  • the unlicense spectrum needs to be LBT, and the channel preemption has a TXOP limit. Therefore, the PDSCH channel cannot be continuously repeated.
  • the scheme only has time domain repetition. And only the narrowband spectrum is involved, and frequency domain repetition enhancement cannot be done.
  • the coverage enhancement can be implemented by repeatedly transmitting the same data on the PDSCH time domain, or by repeatedly transmitting the same data in the PDSCH frequency domain.
  • the embodiments of the present application focus on the description of repeated transmission in the frequency domain.
  • the problem of enhanced PDSCH channel coverage in the unlicense spectrum can be solved.
  • the system bandwidth specified in the MulteFire Alliance supports 10MHz or 20MHz, so coverage enhancement can be repeated in the frequency domain over the wideband spectrum.
  • the power in the 1 MHz bandwidth cannot exceed 10 dBm, and the total transmit power cannot exceed 23 dBm.
  • the embodiment of the present application enables the PDSCH channel to meet the power spectral density regulations and can be as full as possible. Power transmission.
  • FIG. 4 it is a schematic structural diagram of a communication system provided by an embodiment of the present application, where the communication system includes a network device and a plurality of terminal devices in a cell managed by the network device.
  • the network device can communicate with each of the plurality of terminal devices separately.
  • the communication system can be applied to the current LTE or LTE-A (long term evolution advanced) system, and can also be applied to other networks in the future, such as the fifth generation (5rd-generation, 5G) in the future.
  • the network is not specifically limited in this embodiment of the present application.
  • the terminal device in the embodiment of the present application may be a mobile terminal device or a non-mobile terminal device.
  • the device can be distributed in different networks and is mainly used to receive or send service data.
  • terminal devices have different names in different networks, such as: user equipment (UE), mobile stations, subscriber units, stations, cellular phones, personal digital assistants, wireless modems, wireless communication devices, handheld devices, Laptops, cordless phones, wireless local loop stations, etc.
  • the terminal device can communicate with one or more core networks via a radio access network (RAN), such as exchanging voice and/or data with the radio access network.
  • RAN radio access network
  • the network device in the embodiment of the present application is a device deployed in a wireless access network to provide a wireless communication function.
  • An apparatus that provides a base station function for example, in an LTE system or an LTE-A system, includes an evolved Node B (eNB).
  • eNB evolved Node B
  • the network device and the terminal device in the communication system shown in FIG. 1 can be implemented by the communication device (or system) in FIG. 5.
  • the communication device 500 includes at least one processor 501, a communication bus 502, a memory 503, and at least one communication interface 504.
  • the processor 501 can be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more for controlling the execution of the program of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication bus 502 can include a path for communicating information between the components described above.
  • Communication interface 504 using any type of transceiver, for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 503 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions.
  • the dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this.
  • the memory can exist independently and be connected to the processor via a bus.
  • the memory can also be integrated with the processor.
  • the memory 503 is used to store application code for executing the solution of the present application, and is controlled by the processor 501 for execution.
  • the processor 501 is configured to execute the application code stored in the memory 503, thereby implementing the downlink signal transmission method described in the embodiment of the present application.
  • the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG.
  • communication device 500 can include multiple processors, such as processor 501 and processor 508 in FIG. Each of these processors can be a single-CPU processor or a multi-core processor.
  • processors herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.
  • the communication device 500 can also include an output device 505 and an input device 506.
  • Output device 505 is in communication with processor 501 and can display information in a variety of ways.
  • the output device 505 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait.
  • Input device 506 is in communication with processor 501 and can accept user input in a variety of ways.
  • input device 506 can be a mouse, keyboard, touch screen device, or sensing device, and the like.
  • the communication device 500 described above may be a general communication device or a dedicated communication device.
  • the communication device 500 can be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet, a wireless user device, an embedded device, or the like in FIG. device.
  • PDA personal digital assistant
  • the embodiment of the present application does not limit the type of the communication device 500.
  • the embodiment of the present application provides a physical downlink shared channel coverage enhancement method, which is applied to an unlicense spectrum, as shown in FIG. 6, and includes:
  • the network device determines an R group resource block (RB) in the first subframe, where each group of RBs is used to carry the first data, and the number of RBs in each group of RBs is N.
  • R is the natural number of the number of RBs in the downlink resource of the first subframe.
  • the first data and the first subframe described in the embodiment of the present application are all for the same user.
  • the data carried in each group of RBs in the R group RBs is the same, and both are the first data, that is, it is determined that the first data is repeatedly transmitted R times in one first subframe.
  • Network devices can have multiple ways to determine R group resource blocks. Specifically, according to the requirement of coverage enhancement, the requirement may be a preamble of the random access selected by the terminal device based on the strength of the received signal, or the terminal device notifies the network device terminal device to move to the coverage enhancement by using the scheduling request message. In the area, the network device performs coverage enhancement on the terminal.
  • the network device sends first indication information to the terminal device, where the first indication information is used to indicate a location of the R group RB in the first subframe.
  • the network device needs to inform the terminal device of the location of the R group RB, which can be indicated by downlink control information (DCI).
  • DCI downlink control information
  • the R group RBs may be distributed on different downlink frequency domain resources in the first subframe. Further, the R group RBs may be equally spaced on the downlink frequency domain resources of the first subframe, or the R group RBs may be continuously distributed on the downlink frequency domain resources of the first subframe.
  • the terminal device receives the first indication information.
  • the network device sends the first data to the terminal device by using the R group RBs in the first subframe.
  • the terminal device receives the first data by using the R group RBs in the first subframe.
  • the physical downlink shared channel coverage enhancement method provided by the embodiment of the present application transmits the first data by using the R group RBs in the first subframe, and each group of RBs is used to carry the first data, and is substantially repeatedly transmitted in the frequency domain of the PDSCH.
  • the same data is used to implement PDSCH coverage enhancement. Since the frequency domain repetition is repeated, the number of time domain repetitions can be reduced, and even the time domain repetition can be eliminated, which is more suitable for the unlicensed spectrum.
  • step S102 The following is a detailed description of the position of the R group RBs in the first subframe described in step S102.
  • the number of RBs in the downlink resource of the first subframe is (10M bandwidth) 20M bandwidth ), it is divided into J clusters, J is a natural number.
  • the consecutive M RBs form a cluster, and the RB labels in each cluster are 0 to M-1, respectively. Round the symbol down.
  • the same number of RBs in each cluster are combined into one cross resource group (interlace), and there are J RBs in each interlace, and the interlace index is 0 to M-1.
  • interlace is the resource allocation method introduced by the MulteFire Alliance; If it cannot be divisible by J, the consecutive M RBs form a cluster, and the RB labels in each cluster are 0 to M-1, respectively.
  • the number of RB and J clusters is RBs constitute interlace, that is, the index is The interlace contains J+1 RBs, the index is The interlace contains J RBs.
  • the interlace with an index of 0 to 3 includes 17 RBs, and the interlace with an index of 4 to 5 includes 16 RBs.
  • MCS modulation and coding scheme
  • the MCS level and the identifier K of the interlace are indicated, wherein the MCS level is used to indicate the MCS level of the first data, and the identifier K of the interlace is used to indicate that the R group RB occupies an interlace with the identifier K.
  • K is a natural number.
  • the meaning of the resource block assignment in the DCI may be modified to indicate the identifier K of the interlace. For example, for the downlink frequency domain resource in FIG. 7, when the value is 0, it indicates The value of the MCS index in the DCI can be modified to indicate the MCS level, and is not described here.
  • the first method is more suitable for transmitting data packets with smaller block sizes. For example, when I TBS ⁇ 6, this method can not only obtain the coding gain on one RB, but also obtain the repetition gain by repeating R times.
  • the first data of a user is fixed to occupy one interlace, that is, the R group RBs occupy one interlace, which is equivalent to the R group RBs being equally distributed on the downlink frequency domain resources of the first subframe, and further, the R group RBs are according to the RBs.
  • the intervals are distributed on the downlink frequency domain resources of the first subframe, for example, the interval between the RBs in each group, and the interval between the RB groups are the same.
  • the selection range of RBs is shown in Table 3:
  • the DCI is also required to indicate the number N of RBs in each group of RBs.
  • the meaning of the resource block allocation indication in the DCI may be modified to indicate the number N of RBs in each group of RBs.
  • J RBs in an interlace can be occupied by the scheduling algorithm as much as possible, and when Jn*N ⁇ N (that is, the number of remaining RBs in each interlace cannot constitute a group of RBs), the remaining The RB is no longer used to transmit the first data, where n is a natural number.
  • the first mode and the second mode introduce a new resource allocation mode in addition to the existing downlink resource allocation mode.
  • the full implementation of the spectrum regulations can be implemented. Power is sent to meet coverage requirements.
  • the second mode ensures that the MCS level is always 0.
  • the scheduling on the network side ensures that the downlink PDSCH can transmit at the maximum power under the requirements of the spectrum regulations, and can achieve greater flexibility than the first two modes.
  • the fourth way The R group RBs are continuously distributed on the downlink frequency domain resources of the first subframe. This is equivalent to occupying a total of N*R consecutive RBs, as shown in FIG. In this case, the number of RBs in each group of RBs, the number of RB groups R, and the lowest RB index of a group of RBs in the lowest frequency domain location need to be indicated in the DCI.
  • the fourth mode on the unlicensed spectrum through the network side scheduling, can ensure that the downlink PDSCH can be repeated on consecutive resources, but the transmission power spectral density needs to meet the spectrum regulations, so the PDSCH of the user cannot be guaranteed to be transmitted at the maximum power.
  • the gain of the frequency domain repetition can also be obtained, and the resource blocks are continuously allocated, which can be better integrated with the above three resource allocation modes, that is, when the resource allocation needs to be performed for both the non-coverage enhanced user and the coverage enhanced user, if the remaining If the downlink resource cannot satisfy the discretization allocation, the continuous resource allocation may be performed as described in the fourth manner.
  • the first data is data that has been directly sequence-spread, and then the spread data is subjected to resource allocation in any of the above manners.
  • the purpose of frequency domain repetition is achieved, and the gain of frequency domain diversity can also be obtained.
  • Spread spectrum usually includes direct sequence spread spectrum, frequency hopping spread spectrum, and time hopping spread spectrum.
  • the fifth method combines the requirements of coverage enhancement on the unlicensed frequency. By indicating the resource allocation mode and the spreading code in the DCI, direct sequence spread spectrum and frequency hopping spread spectrum can be simultaneously used.
  • the original sequence of the first data is a0, a1, a2, a3...a(A-1)
  • A is the original sequence length
  • the spreading code of the direct sequence spread spectrum is k0, k1, k2, ... k(B-1)
  • B is the length of the spreading code sequence
  • the data after spreading is c0, c1, c2, c3, ... c(LEN-1)
  • c0 a0*(k0 , k1, k2, ... kB-1)
  • c1 a1 * (k0, k1, k2, ... kB-1), ..., for the spread data symbols c0, c1, c2, ...
  • the resource mapping mode is indicated by the first indication information (DCI).
  • the first indication information needs to indicate a spreading code sequence or a spreading code sequence index in addition to the corresponding information. If the network device sends the spreading code sequence table in the system information (SI) message, or specifies the spreading code sequence table through the protocol, the spreading code sequence index needs to be configured in the DCI; if the network device is In the SI message, the spreading code sequence table is not sent, or the spreading code sequence table is not specified by the protocol, and the spreading code sequence needs to be configured in the DCI.
  • SI system information
  • the fifth method implements frequency domain repeated transmission by using a spreading code, which can not only implement repeated transmission in the frequency domain, but also implement multiplexing between user data by using different spreading sequences on the same resource.
  • the embodiments of the present application may divide the functional modules of each device according to the foregoing method example.
  • each functional module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 13 is a schematic diagram showing a possible structure of the network device involved in the foregoing embodiment.
  • the network device 13 includes a determining unit 1311 and a sending unit 1312.
  • the determining unit 1311 is configured to support the network device 13 to perform the process S101 in FIG. 6;
  • the transmitting unit 1312 is configured to support the network device 13 to perform the processes S102 and S104 in FIG. 6. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 14 shows a possible structural diagram of the network device involved in the above embodiment.
  • the network device 13 includes a processing module 1322 and a communication module 1323.
  • the processing module 1322 is configured to control and manage the actions of the network device 13.
  • the processing module 1322 is configured to support the network device 13 to perform the processes S101, S102, and S104 in FIG.
  • Communication module 1313 is used to support communication of network devices with other entities, such as with the functional modules or network entities shown in FIG.
  • the network device 13 may also include a storage module 1321 for storing program codes and data of the network device.
  • the processing module 1322 may be a processor or a controller, for example, may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (application-specific). Integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication module 1323 may be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 1321 may be a memory.
  • the network device involved in the embodiment of the present application may be the network device 13 shown in FIG.
  • the network device 13 includes a processor 1332, a transceiver 1333, a memory 1331, and a bus 1334.
  • the transceiver 1333, the processor 1332, and the memory 1331 are connected to each other through a bus 1334.
  • the bus 1334 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. Wait.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in the figure, but it does not mean that there is only one bus or one type of bus.
  • FIG. 16 is a schematic diagram showing a possible structure of the terminal device 16 involved in the foregoing embodiment, and the terminal device 16 includes: a receiving unit 1611.
  • the receiving unit 1611 is for supporting the terminal device 16 to perform the processes S103 and S105 in FIG. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 17 shows a possible structural diagram of the terminal device involved in the above embodiment.
  • the terminal device 16 includes: a processing module 1622 and a communication module Block 1623.
  • the processing module 1622 is configured to perform control management on the actions of the terminal device.
  • the processing module 1622 is configured to support the terminal device to perform processes S103 and S105 in FIG. 6.
  • Communication module 1613 is used to support communication of terminal device 16 with other entities, such as with the functional modules or network entities shown in FIG.
  • the terminal device 16 may further include a storage module 1621 for storing program codes and data of the terminal device.
  • the processing module 1622 can be a processor or a controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, or a hardware. A component or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication module 1623 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 1621 can be a memory.
  • the terminal device involved in the embodiment of the present application may be the terminal device 16 shown in FIG. 18.
  • the terminal device 16 includes a processor 1632, a transceiver 1633, a memory 1631, and a bus 1634.
  • the transceiver 1633, the processor 1632, and the memory 1631 are connected to each other through a bus 1634.
  • the bus 1634 may be a peripheral component interconnect standard bus or an extended industry standard structure bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in the figure, but it does not mean that there is only one bus or one type of bus.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • 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 routed from a website site, computer, server or data center to another via wire (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.)
  • a website site, computer, server, or data center for transmission can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the 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)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium such as a solid state disk (SSD)

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Abstract

本申请公开了一种物理下行共享信道覆盖增强方法、装置及系统，涉及通信领域，用于用于实现unlicensed频点PDSCH的覆盖增强。物理下行共享信道覆盖增强方法包括：网络设备确定第一子帧中的R组资源块RB，每组RB均用于承载第一数据；所述网络设备向终端设备发送第一指示信息，所述第一指示信息用于指示所述R组RB在所述第一子帧中的位置；所述网络设备通过所述第一子帧中的R组RB向所述终端设备发送所述第一数据；其中，每组RB的RB数为N，为所述第一子帧的下行资源中的RB数，R、N均为自然数。本申请实施例应用于非授权频谱上。

Description

物理下行共享信道覆盖增强方法、装置及系统 技术领域
本申请涉及通信领域，尤其涉及一种物理下行共享信道(physical downlink shared channel，PDSCH)覆盖增强方法和装置。
背景技术
传统运营商一般都具有专属授权频点，即授权(licensed)频点，但由于频率资源日益稀缺，单纯的licensed频点已经不能满足目前的流量需求。例如随着人工智能、自动化办公的兴起，工厂、港口、仓库等应用场景对无线通信的需求也进一步增加。基于保密性、定制型的需求，这些场景不适宜接入传统运营商的licensed频点。并且由于licensed频点的稀缺，所以基于licensed频点建站成本较高。因此，基于非授权(unlicensed)频点部署LTE(long term evolution，长期演进)基站成为这些企业网络的直接选择。
同时，在工厂、港口、仓库等应用场景中，由于遮挡严重，需要对信号进行覆盖增强。现有技术中licensed频点的PDSCH覆盖增强一般通过时域上在多个连续下行子帧上重复发送相同数据来实现，这种方式会连续占用下行信道。
但是对于unlicensed频点来说，为了保证unlicensed频点可以被高效且公平的使用，频谱法规规定各网元在发送数据之前，需要执行先检测后发送(listen before talk，LBT)，即先检测信道空闲后才可以发送。并且每次抢占信道后，最多只能发送有限时长，比如不能超过一个传输机会(transmission opportunity，TXOP)或最大连续占用时长(max continuous occupied time，MCOT)。使得在unlicensed频点上，不能保证PDSCH在连续下行子帧上重复发送。因此现有技术中licensed频点的PDSCH覆盖增强技术并不适用于unlicensed频点。
发明内容
本申请实施例提供一种物理下行共享信道覆盖增强方法、装置及系统，用于实现unlicensed频点PDSCH的覆盖增强。
为达到上述目的，本申请实施例采用如下技术方案：
第一方面，本申请实施例提供了一种物理下行共享信道覆盖增强方法，应用于非授权频谱上，该方法包括：网络设备首先确定第一子帧中承载第一数据的R组资源块RB，R组RB中的每组RB的RB数为N，R和N均为自然数且满足
Figure PCTCN2017072693-appb-000001
为第一子帧的下行资源中的RB数；然后网络设备向终端设备发送第一指示信息，该第一指示信息中指示了上述R组RB在第一子帧中的位置；最后网络设备通过第一子帧中的R组RB向终端设备发送上述第一数据。本申请实施例提供的物理下行共享信道覆盖增强方法，通过 第一子帧中的R组RB来传输第一数据，每组RB均用于承载第一数据，本质上通过PDSCH频域上重复传输同一数据来实现PDSCH覆盖增强。由于通过频域重复，可以减小时域重复次数，甚至可以不使用频域重复，更加适应于unlicensed频谱。
在一种可能的设计中，R组RB分布于第一子帧中不同的下行频域资源上。该设计使得可以利用频域重复而非时域重复来实现PDSCH覆盖增强。
在一种可能的设计中，R组RB等间隔分布于第一子帧的下行频域资源上。该设计使得下发的第一指示信息内容更少，同时可以保证下行PDSCH能够满功率发射。
在一种可能的设计中，第一指示信息为下行控制信息DCI，第一子帧的下行频域资源包括J个簇，每个簇中包括
Figure PCTCN2017072693-appb-000002
个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
Figure PCTCN2017072693-appb-000003
为向下取整；DCI具体用于指示调制与编码策略MCS等级以及交叉资源组的标识K，MCS等级用于指示第一数据的MCS等级，交叉资源组的标识K用于指示R组RB占用标识为K的交叉资源组，
Figure PCTCN2017072693-appb-000004
J和K均为自然数。该设计提供了一种第一指示信息的具体内容。
在一种可能的设计中，N＝1，R＝J，该方法还包括：根据第一数据的传输块大小TBS，调整MCS等级。该设计更加适应于传输块大小较小的数据包，如ITBS<6时，采用该方式，不仅可以在一个RB上获取编码增益，并可以通过重复R次获取重复增益。
在一种可能的设计中，MCS等级为0，N*R＝J，DCI还用于指示每组RB中的RB个数N，R组RB按照RB等间隔分布于第一子帧的下行频域资源上；本申请的上述方法还包括：根据第一数据的TBS，调整每组RB的RB数N。该设计提供另一种第一指示信息的具体内容，同时保证MCS等级始终为0，特别适用于对传输质量要求较高的场景。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000005
R组RB按组等间隔分布于第一子帧的下行频域资源上。该设计提供了又一种第一指示信息的具体内容。
在一种可能的设计中，R组RB连续分布于第一子帧的下行频域资源上。该设计使得可以利用剩余RB来实现频域的覆盖增强。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000006
该设计提供了再一种第一指示信息的具体内容。
在一种可能的设计中，第一数据为经过直接序列扩频后的数据。该设计通过扩频占用更多频域资源，从而实现频域重复，同时也可以获得频域分集 的增益。
在一种可能的设计中，第一指示信息还用于指示扩频码序列或扩频码序列索引。该设计提供了再一种第一指示信息的具体内容。
第二方面，提供了一种物理下行共享信道覆盖增强方法，应用于非授权频谱上，该方法包括：终端设备从网络设备接收第一指示信息，第一指示信息用于指示第一子帧中的R组资源块RB在第一子帧中的位置，每组RB均用于承载第一数据，每组RB的RB数为N，
Figure PCTCN2017072693-appb-000007
为第一子帧的下行资源中的RB数，R、N均为自然数；终端设备通过第一子帧中的R组RB从网络设备接收第一数据。本申请实施例提供的物理下行共享信道覆盖增强方法，通过第一子帧中的R组RB来传输第一数据，每组RB均用于承载第一数据，本质上通过PDSCH频域上重复传输同一数据来实现PDSCH覆盖增强。由于通过频域重复，可以减小时域重复次数，甚至可以不使用频域重复，更加适应于unlicensed频谱。
在一种可能的设计中，R组RB分布于第一子帧中不同的下行频域资源上。该设计使得可以利用频域重复而非时域重复来实现PDSCH覆盖增强。
在一种可能的设计中，R组RB等间隔分布于第一子帧的下行频域资源上。该设计使得下发的第一指示信息内容更少，同时可以保证下行PDSCH能够满功率发射。
在一种可能的设计中，第一指示信息为下行控制信息DCI，第一子帧的下行频域资源包括J个簇，每个簇中包括
Figure PCTCN2017072693-appb-000008
个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
Figure PCTCN2017072693-appb-000009
为向下取整；DCI具体用于指示调制与编码策略MCS等级以及交叉资源组的标识K，MCS等级用于指示第一数据的MCS等级，交叉资源组的标识K用于指示R组RB占用标识为K的交叉资源组，
Figure PCTCN2017072693-appb-000010
J和K均为自然数。该设计提供了一种第一指示信息的具体内容。
在一种可能的设计中，N＝1，R＝J，MCS等级为根据第一数据的传输块大小TBS调整得到。该设计更加适应于传输块大小较小的数据包，如ITBS<6时，采用该方式，不仅可以在一个RB上获取编码增益，并可以通过重复R次获取重复增益。
在一种可能的设计中，MCS等级为0，N*R＝J，DCI还用于指示每组RB中的RB个数N，R组RB按照RB等间隔分布于第一子帧的下行频域资源上，每组RB的RB数N为根据第一数据的TBS调整得到。该设计提供另一种第一指示信息的具体内容，同时保证MCS等级始终为0，通过配置每组RB中RB个数N，可以获取编码增益，并通过重复R次获取重复增益，在传输块大小选择上更加灵活。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB 中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000011
R组RB按组等间隔分布于第一子帧的下行频域资源上。该设计提供了又一种第一指示信息的具体内容。
在一种可能的设计中，R组RB连续分布于第一子帧的下行频域资源上。该设计使得可以利用剩余RB来实现频域的覆盖增强。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000012
该设计提供了再一种第一指示信息的具体内容。
在一种可能的设计中，第一数据为经过直接序列扩频后的数据。该设计通过扩频占用更多频域资源，从而实现频域重复发送，同时也可以获得频域分集的增益。
在一种可能的设计中，第一指示信息还用于指示扩频码序列或扩频码序列索引。该设计提供了再一种第一指示信息的具体内容。
第三方面，本申请实施例提供了一种网络设备，应用于非授权频谱上，网络设备包括：确定单元，用于确定第一子帧中的R组资源块RB，每组RB均用于承载第一数据，每组RB的RB数为N，
Figure PCTCN2017072693-appb-000013
为第一子帧的下行资源中的RB数，R、N均为自然数；发送单元，用于向终端设备发送第一指示信息，第一指示信息用于指示R组RB在第一子帧中的位置；发送单元，还用于通过第一子帧中的R组RB向终端设备发送第一数据。本申请实施例提供的网络设备，通过第一子帧中的R组RB来传输第一数据，每组RB均用于承载第一数据，本质上通过PDSCH频域上重复传输同一数据来实现PDSCH覆盖增强。由于通过频域重复，可以减小时域重复次数，甚至可以不使用频域重复，更加适应于unlicensed频谱。
在一种可能的设计中，R组RB分布于第一子帧中不同的下行频域资源上。该设计使得可以利用频域重复而非时域重复来实现PDSCH覆盖增强。
在一种可能的设计中，R组RB等间隔分布于第一子帧的下行频域资源上。该设计使得下发的第一指示信息内容更少，同时可以保证下行PDSCH能够满功率发射。
在一种可能的设计中，第一指示信息为下行控制信息DCI，第一子帧的下行频域资源包括J个簇，其中，每个簇中包括
Figure PCTCN2017072693-appb-000014
个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
Figure PCTCN2017072693-appb-000015
为向下取整；DCI具体用于指示调制与编码策略MCS等级以及交叉资源组的标识K，MCS等级用于指示第一数据的MCS等级，交叉资源组的标识K用于指示R组RB占用标识为K的交叉资源组，
Figure PCTCN2017072693-appb-000016
J和K均为自然数。该设计提供了一种第一指示信息的具体内容。
在一种可能的设计中，N＝1，R＝J，确定单元还用于根据第一数据的传输 块大小TBS，调整MCS等级。该设计更加适应于传输块大小较小的数据包，如ITBS<6时，采用该方式，不仅可以在一个RB上获取编码增益，并可以通过重复R次获取重复增益。
在一种可能的设计中，MCS等级为0，N*R＝J，DCI还用于指示每组RB中的RB个数N，R组RB按照RB等间隔分布于第一子帧的下行频域资源上；确定单元还用于根据第一数据的TBS，调整每组RB的RB数N。该设计提供另一种第一指示信息的具体内容，同时保证MCS等级始终为0，通过配置每组RB中RB个数N，可以获取编码增益，并通过重复R次获取重复增益，在传输块大小选择上更加灵活。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000017
R组RB按组等间隔分布于第一子帧的下行频域资源上。该设计提供了又一种第一指示信息的具体内容。
在一种可能的设计中，R组RB连续分布于第一子帧的下行频域资源上。该设计使得可以利用剩余RB来实现频域的覆盖增强。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000018
该设计提供了再一种第一指示信息的具体内容。
在一种可能的设计中，第一数据为经过直接序列扩频后的数据。该设计通过扩频占用更多频域资源，从而实现频域重复发送，同时也可以获得频域分集的增益。
在一种可能的设计中，第一指示信息还用于指示扩频码序列或扩频码序列索引。该设计提供了再一种第一指示信息的具体内容。
第四方面，本申请实施例提供了一种终端设备，应用于非授权频谱上，终端设备包括：接收单元，用于从网络设备接收第一指示信息，第一指示信息用于指示第一子帧中的R组资源块RB在第一子帧中的位置，每组RB均用于承载第一数据，每组RB的RB数为N，
Figure PCTCN2017072693-appb-000019
为第一子帧的下行资源中的RB数，R、N均为自然数；接收单元，还用于通过第一子帧中的R组RB从网络设备接收第一数据。本申请实施例提供的终端设备，通过第一子帧中的R组RB来传输第一数据，每组RB均用于承载第一数据，本质上通过PDSCH频域上重复传输同一数据来实现PDSCH覆盖增强。由于通过频域重复，可以减小时域重复次数，甚至可以不使用频域重复，更加适应于unlicensed频谱。
在一种可能的设计中，R组RB分布于第一子帧中不同的下行频域资源上。该设计使得可以利用频域重复而非时域重复来实现PDSCH覆盖增强。
在一种可能的设计中，R组RB等间隔分布于第一子帧的下行频域资源上。该设计使得下发的第一指示信息内容更少，同时可以保证下行PDSCH能够满功率发射。
在一种可能的设计中，第一指示信息为下行控制信息DCI，第一子帧的 下行频域资源包括J个簇，其中，每个簇中包括
Figure PCTCN2017072693-appb-000020
个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
Figure PCTCN2017072693-appb-000021
为向下取整；DCI具体用于指示调制与编码策略MCS等级以及交叉资源组的标识K，MCS等级用于指示第一数据的MCS等级，交叉资源组的标识K用于指示R组RB占用标识为K的交叉资源组，
Figure PCTCN2017072693-appb-000022
J和K均为自然数。该设计提供了一种第一指示信息的具体内容。
在一种可能的设计中，N＝1，R＝J，MCS等级为根据第一数据的传输块大小TBS调整得到。该设计更加适应于传输块大小较小的数据包，如ITBS<6时，采用该方式，不仅可以在一个RB上获取编码增益，并可以通过重复R次获取重复增益。
在一种可能的设计中，MCS等级为0，N*R＝J，DCI还用于指示每组RB中的RB个数N，R组RB按照RB等间隔分布于第一子帧的下行频域资源上，每组RB的RB数N为根据第一数据的TBS调整得到。该设计提供另一种第一指示信息的具体内容，同时保证MCS等级始终为0，通过配置每组RB中RB个数N，可以获取编码增益，并通过重复R次获取重复增益，在传输块大小选择上更加灵活。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000023
R组RB按组等间隔分布于第一子帧的下行频域资源上。该设计提供了又一种第一指示信息的具体内容。
在一种可能的设计中，R组RB连续分布于第一子帧的下行频域资源上。该设计使得可以利用剩余RB来实现频域的覆盖增强。
在一种可能的设计中，第一指示信息为DCI，DCI具体用于指示每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000024
该设计提供了再一种第一指示信息的具体内容。
在一种可能的设计中，第一数据为经过直接序列扩频后的数据。该设计通过扩频占用更多频域资源，从而实现频域重复发送，同时也可以获得频域分集的增益。
在一种可能的设计中，第一指示信息还用于指示扩频码序列或扩频码序列索引。该设计提供了再一种第一指示信息的具体内容。
第五方面，本申请实施例提供一种网络设备，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该网络设备运行时，该处理器执行该存储器存储的该计算机执行指令，以使该网络设备执行上述第一方面中任意一项的物理下行共享信道覆盖增强方法。
第六方面，本申请实施例提供了一种计算机存储介质，用于储存为上述网络设备所用的计算机软件指令，其包含用于执行上述方面为网络设备所设 计的程序。
第七方面，本申请实施例提供了一种计算机程序，该计算机程序包括指令，当该计算机程序被计算机执行时，使得计算机可以执行上述第二方面中任意一项的物理下行共享信道覆盖增强方法。
另外，第五方面至第七方面中任一种设计方式所带来的技术效果可参见第一方面中不同设计方式所带来的技术效果，此处不再赘述。
第八方面，本申请实施例提供一种终端设备，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该终端设备运行时，该处理器执行该存储器存储的该计算机执行指令，以使该终端设备执行上述第二方面中任意一项的物理下行共享信道覆盖增强方法。
第九方面，本申请实施例提供了一种计算机存储介质，用于储存为上述终端设备所用的计算机软件指令，其包含用于执行上述方面为终端设备所设计的程序。
第十方面，本申请实施例提供了一种计算机程序，该计算机程序包括指令，当该计算机程序被计算机执行时，使得计算机可以执行上述第二方面中任意一项的物理下行共享信道覆盖增强方法。
另外，第八方面至第十方面中任一种设计方式所带来的技术效果可参见第二方面中不同设计方式所带来的技术效果，此处不再赘述。
第十一方面，本申请实施例提供一种通信系统，包括如上述任一方面所述的网络设备以及如上述任一方面所述的终端设备。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为现有技术中基于unlicensed频点部署的LTE基站和WIFI共存的示意图；
图2为现有技术中unlicensed频点上WIFI系统和LTE系统信道占用的示意图；
图3为现有技术中eMTC标准中PDSCH信道覆盖增强的示意图；
图4为本申请实施例提供的一种通信系统的结构示意图；
图5为本申请实施例提供的一种通信设备的硬件结构示意图；
图6为本申请实施例提供的一种物理下行共享信道覆盖增强方法的流程示意图；
图7为本申请实施例提供的一种下行资源分配示例的示意图；
图8为本申请实施例提供的另一种下行资源分配示例的示意图；
图9为本申请实施例提供的又一种下行资源分配示例的示意图；
图10为本申请实施例提供的再一种下行资源分配示例的示意图；
图11为本申请实施例提供的再一种下行资源分配示例的示意图；
图12为本申请实施例提供的再一种下行资源分配示例的示意图；
图13为本申请实施例提供的一种网络设备的结构示意图；
图14为本申请实施例提供的又一种网络设备的结构示意图；
图15为本申请实施例提供的另一种网络设备的结构示意图；
图16为本申请实施例提供的一种终端设备的结构示意图；
图17为本申请实施例提供的又一种终端设备的结构示意图；
图18为本申请实施例提供的另一种终端设备的结构示意图。
具体实施方式
下面结合附图，对本申请实施例进行描述。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例既可以应用于时分双工(time division duplexing，TDD)的场景，也可以适用于频分双工(frequency division duplexing，FDD)的场景。
unlicensed频点的特点之一是允许不同单位和个人、不同制式的系统可以使用同一个频点，目前unlicensed频点主要由无线保真(wireless fidelity，WIFI)系统使用，参照图1中所示为基于unlicensed频点部署的LTE基站和WIFI共存场景之一。
因此为了保证unlicensed频点可以被高效且公平的使用，频谱法规规定各网元在发送数据之前，需要执行LBT(例如空闲信道评测(clear channel assessment，CCA)等)，即检测信道空闲后才可以发送，并且每次抢占信道后，最多只能发送有限时长，比如不能超过一个TXOP或MCOT，一个TXOP或MCOT时长可以为10ms，8ms等。因此，虽然工作在unlicensed频点的系统可以采用FDD制式，即采用两个unlicensed频点分别用于上下行业务，但具体到一个unlicensed频点，不同系统之间是采用TDD的方式进行频率资源的复用。参照图2中所示为unlicensed频点上WIFI系统和LTE系统信道占用的示意图。
不同的国家和地区对unlicensed频谱有不同的法规约束，其中ETSI(European telecommunications standards institute，欧洲电信标准协会)频谱法规规定，在unlicensed频点上，各无线发射单元功率谱不能超过门限值，不同频段的法规限制如表1所示。
表1
Figure PCTCN2017072693-appb-000025
注1：如果带宽全部落在5150-5250MHz，支持23dBm，否则支持20dBm
注2：如果带宽全部落在5150-5250MHz，支持10dBm，否则支持7dBm
注3：如果没有雷达干扰检测功能，则与5250-5350MHz频段的限制相同
即：对于5150～5350MHz带宽内，在使用TPC(transmit power control，发射功率控制)的场景，最大发射功率不能超过23dBm，最大功率谱密度不能超过10dBm/MHz，其它场景同理。
在LTE系统中，一个调度单位通常是多用户调度。上行用户发送可以通过频率资源离散化保证在满足功率谱的前提下，充分利用满功率发送，即用户上行数据可以尽量满功率发送。但当下行存在多用户调度时，功率在多用户间共享，所以下行单个用户一般无法满功率发送，因此存在用户上下行功率不一致的问题，下行信道覆盖更加受限。
PDSCH信道主要用于传输业务数据，也可以传输信令，其频域资源位置通过物理下行控制信道(physical downlink control channel，PDCCH)或者增强物理下行控制信道(enhanced physical downlink control channel，EPDCCH)信道指示。LTE的PDSCH的资源分配方式分为3种类型，即类型0(type0)、类型1(type1)和类型2(type2)，详细参见3GPP TS 36.213协议。
在LTE R13标准中，引入了增强型机器类通信(enhanced machine type communication，eMTC)标准，即在窄带系统中采用不同时间重复发送相同PDSCH数据的方案来实现PDSCH信道覆盖增强。具体参照图3中所示，窄带物理下行控制信道(narrowband physical downlink control channel，MPDCCH)在不同时间进行重复发送后，通过跨子帧调度来指示PDSCH重复发送的次数，使得PDSCH在多个连续下行子帧上重复发送。该方案要求下行信道连续占用，不适用于unlicense频谱的覆盖增强，unlicense频谱需要做LBT，并且每次信道抢占有TXOP的限制，因此不能保证PDSCH信道能够连续重复；另外该方案只有时域重复，且只涉及到窄带频谱，无法做频域重复增强。
可以通过PDSCH时域上重复传输同一数据来实现覆盖增强，也可以通过PDSCH频域上重复传输同一数据来实现覆盖增强。本申请实施例着重对频域上重复传输进行描述。可以解决unlicense频谱下PDSCH信道覆盖增强的问题。MulteFire联盟中所规定的系统带宽支持10MHz或20MHz，因此可以在宽带频谱上通过频域重复进行覆盖增强。另外，由于unlicense频谱关于功率谱密度和总发射功率的限制，比如1MHz带宽上功率不能超过10dBm，总发射功率不能超过23dBm，本申请实施例使得PDSCH信道能够满足功率谱密度法规并能够尽量以满功率发送。
参照图4中所示，为本申请实施例提供的通信系统的架构示意图，该通信系统包括网络设备、以及该网络设备管理的小区内的多个终端设备。其中，网络设备可以与这多个终端设备中的每个终端设备分别进行通信。上述 通信系统可以应用于目前的LTE或者LTE-A(long term evolution advanced，长期演进技术升级版)系统中，也可以应用于未来的其它网络中，比如未来的第五代(5rd-generation，5G)网络，本申请实施例对此不作具体限定。
具体的，本申请实施例中的终端设备可以是可移动的终端设备，也可以是不可移动的终端设备。该设备可分布于不同的网络中，主要用于接收或者发送业务数据。其中，在不同的网络中终端设备有不同的名称，例如：用户设备(user equipment，UE)、移动台、用户单元、站台、蜂窝电话、个人数字助理、无线调制解调器、无线通信设备、手持设备、膝上型电脑、无绳电话、无线本地环路台等。该终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，例如与无线接入网交换语音和/或数据。
具体的，本申请实施例中的网络设备是一种部署在无线接入网用以提供无线通信功能的装置。例如在LTE系统或者LTE-A系统中提供基站功能的设备包括演进的节点B(evolved nodeB，eNB)。
具体的，图1所示的通信系统中的网络设备和终端设备可以通过图5中的通信设备(或系统)来实现。
参照图5中所示，为本申请实施例提供的一种通信设备的硬件结构示意图，该通信设备500包括至少一个处理器501，通信总线502，存储器503以及至少一个通信接口504。
处理器501可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信总线502可包括一通路，在上述组件之间传送信息。
通信接口504，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。
存储器503可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过总线与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器503用于存储执行本申请方案的应用程序代码，并由处理器501来控制执行。处理器501用于执行存储器503中存储的应用程序代码，从而实现本申请实施例中所述的下行信号传输方法。
在具体实现中，作为一种实施例，处理器501可以包括一个或多个CPU，例如图5中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信设备500可以包括多个处理器，例如图5中的处理器501和处理器508。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信设备500还可以包括输出设备505和输入设备506。输出设备505和处理器501通信，可以以多种方式来显示信息。例如，输出设备505可以是液晶显示器(liquid crystal display，LCD),发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备506和处理器501通信，可以以多种方式接受用户的输入。例如，输入设备506可以是鼠标、键盘、触摸屏设备或传感设备等。
上述的通信设备500可以是一个通用通信设备或者是一个专用通信设备。在具体实现中，通信设备500可以是台式机、便携式电脑、网络服务器、掌上电脑(personal digital assistant，PDA)、移动手机、平板电脑、无线用户设备、嵌入式设备或有图5中类似结构的设备。本申请实施例不限定通信设备500的类型。
本申请实施例提供了一种物理下行共享信道覆盖增强方法，应用于unlicense频谱，参照图6中所示，包括：
S101、网络设备确定第一子帧中的R组资源块(resource block，RB)，每组RB均用于承载第一数据，每组RB的RB数为N，
Figure PCTCN2017072693-appb-000026
为第一子帧的下行资源中的RB数，R、N均为自然数。
本申请实施例所述的第一数据和第一子帧均是针对同一用户来说。R组RB中各组RB中承载的数据相同，并且均为第一数据，即相当于在一个第一子帧中确定将第一数据重复传输R次。
网络设备可以有多种方式来确定R组资源块。具体的，可以根据覆盖增强的需要，所述需要可以是终端设备基于接收信号的强度选择的随机接入的前导码，或者是终端设备通过调度请求消息通知网络设备终端设备移动到需要覆盖增强的区域，网络设备对该终端进行覆盖增强。
S102、网络设备向终端设备发送第一指示信息，该第一指示信息用于指示上述R组RB在第一子帧中的位置。
由于是在同一子帧的不同组RB上进行传输，所以网络设备需要告知终端设备上述R组RB所在的位置，具体的可以通过下行控制信息(downlink control information，DCI)来指示。上述R组RB可以分布于第一子帧中不同的下行频域资源上。进一步的，上述R组RB可以等间隔分布于第一子帧的下行频域资源上，或者，上述R组RB可以连续分布于第一子帧的下行频域资源上。
S103、终端设备接收第一指示信息。
S104、网络设备通过第一子帧中的R组RB向终端设备发送第一数据。
S105、终端设备通过第一子帧中的R组RB接收第一数据。
本申请实施例提供的物理下行共享信道覆盖增强方法，通过第一子帧中的R组RB来传输第一数据，每组RB均用于承载第一数据，本质上通过PDSCH频域上重复传输同一数据来实现PDSCH覆盖增强。由于通过频域重复，可以减小时域重复次数，甚至可以不使用时域重复，更加适应于unlicensed频谱。
下面着重对步骤S102中所述的R组RB在第一子帧中的位置进行详细描述。
对于第一子帧的下行资源中的RB数为
Figure PCTCN2017072693-appb-000027
(10M带宽时
Figure PCTCN2017072693-appb-000028
20M带宽时
Figure PCTCN2017072693-appb-000029
)，将其分为J个簇(cluster)，J为自然数。如果
Figure PCTCN2017072693-appb-000030
能被J整除，则连续的M个RB组成一个簇(cluster)，每个cluster内RB标号分别为0～M-1，
Figure PCTCN2017072693-appb-000031
为向下取整符号。然后将各个cluster中相同编号的RB组成一个交叉资源组(interlace)，则每个interlace中有J个RB，interlace索引为0～M-1。其中，interlace为MulteFire联盟引入的资源分配方式；如果
Figure PCTCN2017072693-appb-000032
不能被J整除，则连续的M个RB组成一个cluster，每个cluster内RB标号分别为0～M-1，
Figure PCTCN2017072693-appb-000033
剩余的
Figure PCTCN2017072693-appb-000034
个RB，对其编号为
Figure PCTCN2017072693-appb-000035
在资源分配上，采用预定义的方式，剩余的
Figure PCTCN2017072693-appb-000036
个RB中编号为
Figure PCTCN2017072693-appb-000037
的RB和J个簇内编号为
Figure PCTCN2017072693-appb-000038
的RB分别构成interlace，即索引为
Figure PCTCN2017072693-appb-000039
的interlace内包含J+1个RB，索引为
Figure PCTCN2017072693-appb-000040
的interlace内包含J个RB。
比如20MHz带宽对应100个RB(即
Figure PCTCN2017072693-appb-000041
)，则可以将100个RB平均分成10份(即J＝10)，每份称为一个cluster，每个cluster内10个RB(即
Figure PCTCN2017072693-appb-000042
)，索引为0～9。也可以将100个RB分成16份(即J＝16)，每份称为一个cluster，每个cluster内6个RB(即
Figure PCTCN2017072693-appb-000043
)，索引为0～5，剩余4个RB，索引为0～3，则索引为0～3的interlace中包含17个RB，索引为4～5的interlace中包含16个RB。示例性的参照图7中所示，为M＝10时上述下行资源分配的一种示例。
第一种方式。一个用户的第一数据固定占用1个interlace，即R组RB占用一个interlace，相当于R组RB等间隔分布于第一子帧的下行频域资源上。根据第一数据的传输块大小(transport block size，TBS)(如表2中的ITBS)，调整第一数据的调制与编码策略(modulation and coding scheme，MCS)等级，使第一数据能够在1个RB上承载(即N＝1，并且R＝J，对应于表2中的NPRB＝1)，并且能够在1个interlace上重复发送，MCS的选取范围如表2所示：
表2
Figure PCTCN2017072693-appb-000044
在DCI中指示MCS等级以及interlace的标识K，其中的MCS等级用于指示第一数据的MCS等级，interlace的标识K用于指示R组RB占用标识为K的interlace，
Figure PCTCN2017072693-appb-000045
且K为自然数。示例性的，可以修改DCI中的资源块分配指示(resource block assignment)的含义用于指示interlace的标识K，例如对于图7中的下行频域资源来说，当其取值为0时即表示占用交叉资源组0；可以修改DCI中的MCS索引的含义用于指示上述MCS等级，在此不再赘述。
第一种方式更加适应于传输块大小较小的数据包，如ITBS<6时，采用该方式，不仅可以在一个RB上获取编码增益，并可以通过重复R次获取重复增益。
第二种方式。一个用户的第一数据固定占用1个interlace，即R组RB均占用一个interlace，相当于R组RB等间隔分布于第一子帧的下行频域资源上，更进一步的，R组RB按照RB等间隔分布于第一子帧的下行频域资源上，例如，每组内的RB之间的间隔，以及各RB组之间的间隔都是相同的。且固定MCS等级为0(如表3中的MCS)，根据第一数据的TBS(如表3中的ITBS)，调整第一数据对应的每组RB中的RB个数N，并且N*R＝J。对于首次发送未占满的RB，用户可以继续重复发送。假设1个interlace中有16个RB，则RB的选取范围如表3所示：
表3
Figure PCTCN2017072693-appb-000046
如果1个interlace中有10个RB，则RB的选取范围如表4所示：
表4
Figure PCTCN2017072693-appb-000047
除了如第一种方式所述的在DCI中指示MCS等级以及interlace的标识K以外，还需要DCI还用于指示每组RB中的RB个数N。示例性的，可以修改DCI中的资源块分配指示的含义用于指示每组RB中的RB个数N。
另外，由于N*R＝J，而每个interlace中的RB数J是固定的，因此对于20MHz带宽对应100个RB来说，如果1个interlace中含有RB个数J为10， 则可能的每组RB中的RB个数以及RB组数R(即重复次数R)的对应关系如表5所示：
表5
N 1 2 5 10
R 10 5 2 1
对于20MHz带宽对应100个RB来说，如果假设1个interlace中含有RB个数J为16，则可能的每组RB中的RB个数以及RB组数R(即重复次数R)的对应关系如表6所示：
表6
N 1 2 4 8
R 16 8 4 2
需要说明的是，对于MCS＝0时，可以通过调度算法尽量占满一个interlace中的J个RB，当J-n*N<N(即每个interlace中剩余RB数不能构成一组RB)时，剩余的RB不再用于传输第一数据，其中，n为自然数。
第二种方式与第一种方式的区别在于，第一种方式相当于第二种方式中N＝1的特例。示例性的，参照图8中所示，为第二种方式中
Figure PCTCN2017072693-appb-000048
M＝10，J＝10，N＝2，R＝5，K＝0的下行资源分配的一种示例。从中可以看出100个RB可以划分为10个簇，每个簇10个RB(M＝10)，K＝0的interlace中有10个RB0(J＝10)；由于N＝2，所以第一簇和第二簇的RB0作为第一组RB，第三簇和第四簇的RB0作为第二组RB，依次类推，共有5组RB(即第一数据可以重复发送5次)。
第一种方式和第二种方式在已有下行资源分配方式外引入了一种新的资源分配方式，在unlicensed频谱上，通过占用不同cluster上资源块，可以在满足频谱法规的要求下实现满功率发送，以满足覆盖要求。第二种方式保证MCS等级始终为0，通过配置每组RB中RB个数N，可以获取编码增益，并通过重复R次获取重复增益，在传输块大小选择上更加灵活。
第三种方式，R组RB不再按照interlace分布，而是等间隔分布于第一子帧的下行频域资源上，更进一步的，R组RB按组等间隔分布于第一子帧的下行频域资源上，具体如图9中所示。此时需要在DCI中指示每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000049
示例性的，参照图10中所示，为第三种方式中
Figure PCTCN2017072693-appb-000050
N＝2，IRB＝5，R＝4的下行资源分配的一种示例。从中可以看出，最低从RB5开始有数据传输
Figure PCTCN2017072693-appb-000051
每组有2个RB(N＝2)，各级之间间隔5个RB(IRB＝5，例如第一组RB与第二组RB之间间隔RB7-RB11)，一共有4组RB(R＝4，即重复发送次数为4)。
第三种方式在unlicensed频谱上，通过网络侧的调度，可以保证下行PDSCH在满足频谱法规的要求下，能够以最大功率发送，并且相比于前两种方式，可以实现更大的灵活性。
第四种方式。R组RB连续分布于第一子帧的下行频域资源上。相当于一共占用N*R个连续的RB，具体如图11中所示。此时需要在DCI中指示每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
Figure PCTCN2017072693-appb-000052
参照图12中所示，为第四种方式中
Figure PCTCN2017072693-appb-000053
N＝2，R＝4的下行资源分配的一种示例。从中可以看出，最低从RB5开始有数据传输
Figure PCTCN2017072693-appb-000054
每组有2个RB(N＝2)，一共有4组RB(R＝4，即重复发送次数为4)。
第四种方式在unlicensed频谱上，通过网络侧的调度，可以保证下行PDSCH能够在连续的资源上进行重复，但发送功率谱密度需要满足频谱法规，因此无法保证该用户PDSCH能够以最大功率发送，但同样可以获得频域重复的增益，并且资源块连续分配，可以与上述三种资源分配方式更好的融合，即当需要同时对非覆盖增强用户和覆盖增强用户进行资源分配时，如果余下的下行资源不能满足离散化分配，则可以按照第四种方式所述进行连续资源分配。
第五种方式，第一数据为经过直接序列扩频后的数据，然后对扩频后的数据进行上述任意一种方式的资源分配。本方式由于扩频后需要占用更多的频域资源，从而实现频域重复的目的，同时也可以获得频域分集的增益。
扩频通常包括直接序列扩频、跳频扩频、跳时扩频等。第五种方式结合unlicensed频点上覆盖增强的需求，通过在DCI中指示资源分配方式和扩频码，可以实现同时使用直接序列扩频和跳频扩频。
假设第一数据原始序列为a0,a1,a2,a3…a(A-1)，A为原始序列长度，直接序列扩频的扩频码为k0,k1,k2,…k(B-1)，B为扩频码序列长度，则扩频后的数据长度LEN＝A*B，扩频后数据为c0,c1,c2,c3,…c(LEN-1)，其中c0＝a0*(k0,k1,k2,…kB-1),c1＝a1*(k0,k1,k2,…kB-1)…，对扩频后的数据符号c0,c1,c2,…c(LEN-1)的资源映射方式由第一指示信息(DCI)指示。在与上述每一种方式结合时，第一指示信息除了指示对应信息以外，还需要指示扩频码序列或扩频码序列索引。如果网络设备在系统信息(system information，SI)消息中下发了扩频码序列表格，或者通过协议规定了扩频码序列表格，则在DCI中需要配置扩频码序列索引；如果网络设备在SI消息中没有下发扩频码序列表格，或者没有通过协议规定扩频码序列表格，则在DCI中需要配置扩频码序列。
第五种方式通过扩频码实现频域重复发送，不仅可以实现频域重复发送，并且可以通过在相同资源上使用不同的扩频序列，实现用户数据间的复用。
本申请实施例可以根据上述方法示例对各设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图13示出了上述实施例中所涉及的网络设备的一种可能的结构示意图，网络设备13包括：确定单元1311、发送单元1312。确定单元1311用于支持网络设备13执行图6中的过程S101；发送单元1312用于支持网络设备13执行图6中的过程S102和S104。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在采用集成的单元的情况下，图14示出了上述实施例中所涉及的网络设备的一种可能的结构示意图。网络设备13包括：处理模块1322和通信模块1323。处理模块1322用于对网络设备13的动作进行控制管理，例如，处理模块1322用于支持网络设备13执行图3中的过程S101、S102和S104。通信模块1313用于支持网络设备与其他实体的通信，例如与图4中示出的功能模块或网络实体之间的通信。网络设备13还可以包括存储模块1321，用于存储网络设备的程序代码和数据。
其中，处理模块1322可以是处理器或控制器，例如可以是中央处理器(central processing unit，CPU)，通用处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信模块1323可以是收发器、收发电路或通信接口等。存储模块1321可以是存储器。
当处理模块1322为处理器，通信模块1323为收发器，存储模块1321为存储器时，本申请实施例所涉及的网络设备可以为图15所示的网络设备13。
参阅图15所示，该网络设备13包括：处理器1332、收发器1333、存储器1331、总线1334。其中，收发器1333、处理器1332、存储器1331通过总线1334相互连接；总线1334可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在采用对应各个功能划分各个功能模块的情况下，图16示出了上述实施例中所涉及的终端设备16的一种可能的结构示意图，终端设备16包括：接收单元1611。接收单元1611用于支持终端设备16执行图6中的过程S103和S105。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在采用集成的单元的情况下，图17示出了上述实施例中所涉及的终端设备的一种可能的结构示意图。终端设备16包括：处理模块1622和通信模 块1623。处理模块1622用于对终端设备的动作进行控制管理，例如，处理模块1622用于支持终端设备执行图6中的过程S103和S105。通信模块1613用于支持终端设备16与其他实体的通信，例如与图4中示出的功能模块或网络实体之间的通信。终端设备16还可以包括存储模块1621，用于存储终端设备的程序代码和数据。
其中，处理模块1622可以是处理器或控制器，例如可以是中央处理器，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信模块1623可以是收发器、收发电路或通信接口等。存储模块1621可以是存储器。
当处理模块1622为处理器，通信模块1623为收发器，存储模块1621为存储器时，本申请实施例所涉及的终端设备可以为图18所示的终端设备16。
参阅图18所示，该终端设备16包括：处理器1632、收发器1633、存储器1631、总线1634。其中，收发器1633、处理器1632、存储器1631通过总线1634相互连接；总线1634可以是外设部件互连标准总线或扩展工业标准结构总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所 述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。

Claims (47)

  1. 一种物理下行共享信道PDSCH覆盖增强方法，其特征在于，应用于非授权频谱上，所述方法包括：
    网络设备确定第一子帧中的R组资源块RB，每组RB均用于承载第一数据；
    所述网络设备向终端设备发送第一指示信息，所述第一指示信息用于指示所述R组RB在所述第一子帧中的位置；
    所述网络设备通过所述第一子帧中的R组RB向所述终端设备发送所述第一数据；
    其中，每组RB的RB数为N，
    Figure PCTCN2017072693-appb-100001
    Figure PCTCN2017072693-appb-100002
    为所述第一子帧的下行资源中的RB数，R、N均为自然数。
  2. 根据权利要求1所述的方法，其特征在于，所述R组RB分布于所述第一子帧中不同的下行频域资源上。
  3. 根据权利要求1或2所述的方法，其特征在于，所述R组RB等间隔分布于所述第一子帧的下行频域资源上。
  4. 根据权利要求3所述的方法，其特征在于，所述第一指示信息为下行控制信息DCI，所述第一子帧的下行频域资源包括J个簇，其中，每个簇中包括
    Figure PCTCN2017072693-appb-100003
    个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
    Figure PCTCN2017072693-appb-100004
    为向下取整；
    所述DCI具体用于指示调制与编码策略MCS等级以及所述交叉资源组的标识K，所述MCS等级用于指示所述第一数据的MCS等级，所述交叉资源组的标识K用于指示所述R组RB占用标识为K的交叉资源组，
    Figure PCTCN2017072693-appb-100005
    J和K均为自然数。
  5. 根据权利要求4所述的方法，其特征在于，N＝1，R＝J，所述方法还包括：
    根据所述第一数据的传输块大小TBS，调整所述MCS等级。
  6. 根据权利要求4所述的方法，其特征在于，所述MCS等级为0，N*R＝J，所述DCI还用于指示所述每组RB中的RB个数N，
    所述R组RB等间隔分布于所述第一子帧的下行频域资源上，包括：
    所述R组RB按照RB等间隔分布于所述第一子帧的下行频域资源上；
    所述方法还包括：
    根据所述第一数据的TBS，调整每组RB的RB数N。
  7. 根据权利要求3所述的方法，其特征在于，所述第一指示信息为DCI，所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100006
    所述R组RB等间隔分布于所述第一子帧的下行频域资源上，包括：
    所述R组RB按组等间隔分布于所述第一子帧的下行频域资源上。
  8. 根据权利要求2所述的方法，其特征在于，所述R组RB连续分布于所述第一子帧的下行频域资源上。
  9. 根据权利要求8所述的方法，其特征在于，所述第一指示信息为DCI，
    所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100007
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述第一数据为经过直接序列扩频后的数据。
  11. 根据权利要求10所述的方法，其特征在于，所述第一指示信息还用于指示扩频码序列或扩频码序列索引。
  12. 一种物理下行共享信道PDSCH覆盖增强方法，其特征在于，应用于非授权频谱上，所述方法包括：
    终端设备从网络设备接收第一指示信息，所述第一指示信息用于指示第一子帧中的R组资源块RB在所述第一子帧中的位置，每组RB均用于承载第一数据；
    所述终端设备通过所述第一子帧中的R组RB从所述网络设备接收所述第一数据；
    其中，每组RB的RB数为N，
    Figure PCTCN2017072693-appb-100008
    Figure PCTCN2017072693-appb-100009
    为所述第一子帧的下行资源中的RB数，R、N均为自然数。
  13. 根据权利要求12所述的方法，其特征在于，所述R组RB分布于所述第一子帧中不同的下行频域资源上。
  14. 根据权利要求12或13所述的方法，其特征在于，所述R组RB等间隔分布于所述第一子帧的下行频域资源上。
  15. 根据权利要求14所述的方法，其特征在于，所述第一指示信息为下行控制信息DCI，所述第一子帧的下行频域资源包括J个簇，其中，每个簇中包括
    Figure PCTCN2017072693-appb-100010
    个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
    Figure PCTCN2017072693-appb-100011
    为向下取整；
    所述DCI具体用于指示调制与编码策略MCS等级以及所述交叉资源组的标识K，所述MCS等级用于指示所述第一数据的MCS等级，所述交叉资源组的标识K用于指示所述R组RB占用标识为K的交叉资源组，
    Figure PCTCN2017072693-appb-100012
    J和K均为自然数。
  16. 根据权利要求15所述的方法，其特征在于，N＝1，R＝J，所述MCS等级为根据所述第一数据的传输块大小TBS调整得到。
  17. 根据权利要求15所述的方法，其特征在于，所述MCS等级为0，N*R＝J，所述DCI还用于指示所述每组RB中的RB个数N，所述R组RB按照RB等间隔分布于所述第一子帧的下行频域资源上，所述每组RB的RB数N为根据所述第一数据的TBS调整得到。
  18. 根据权利要求14所述的方法，其特征在于，所述第一指示信息为DCI， 所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100013
    所述R组RB按组等间隔分布于所述第一子帧的下行频域资源上。
  19. 根据权利要求13所述的方法，其特征在于，所述R组RB连续分布于所述第一子帧的下行频域资源上。
  20. 根据权利要求19所述的方法，其特征在于，所述第一指示信息为DCI，
    所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100014
  21. 根据权利要求12-20任一项所述的方法，其特征在于，所述第一数据为经过直接序列扩频后的数据。
  22. 根据权利要求21所述的方法，其特征在于，所述第一指示信息还用于指示扩频码序列或扩频码序列索引。
  23. 一种网络设备，其特征在于，应用于非授权频谱上，所述网络设备包括：
    确定单元，用于确定第一子帧中的R组资源块RB，每组RB均用于承载第一数据；
    发送单元，用于向终端设备发送第一指示信息，所述第一指示信息用于指示所述R组RB在所述第一子帧中的位置；
    所述发送单元，还用于通过所述第一子帧中的R组RB向所述终端设备发送所述第一数据；
    其中，每组RB的RB数为N，
    Figure PCTCN2017072693-appb-100015
    Figure PCTCN2017072693-appb-100016
    为所述第一子帧的下行资源中的RB数，R、N均为自然数。
  24. 根据权利要求23所述的网络设备，其特征在于，所述R组RB分布于所述第一子帧中不同的下行频域资源上。
  25. 根据权利要求23或24所述的网络设备，其特征在于，所述R组RB等间隔分布于所述第一子帧的下行频域资源上。
  26. 根据权利要求25所述的网络设备，其特征在于，所述第一指示信息为下行控制信息DCI，所述第一子帧的下行频域资源包括J个簇，其中，每个簇中包括
    Figure PCTCN2017072693-appb-100017
    个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
    Figure PCTCN2017072693-appb-100018
    为向下取整；
    所述DCI具体用于指示调制与编码策略MCS等级以及所述交叉资源组的标识K，所述MCS等级用于指示所述第一数据的MCS等级，所述交叉资源组的标识K用于指示所述R组RB占用标识为K的交叉资源组，
    Figure PCTCN2017072693-appb-100019
    J和K均为自然数。
  27. 根据权利要求26所述的网络设备，其特征在于，N＝1，R＝J，所述确定单元还用于根据所述第一数据的传输块大小TBS，调整所述MCS等级。
  28. 根据权利要求26所述的网络设备，其特征在于，所述MCS等级为0， N*R＝J，所述DCI还用于指示所述每组RB中的RB个数N，所述R组RB按照RB等间隔分布于所述第一子帧的下行频域资源上；所述确定单元还用于根据所述第一数据的TBS，调整每组RB的RB数N。
  29. 根据权利要求25所述的网络设备，其特征在于，所述第一指示信息为DCI，所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100020
    所述R组RB按组等间隔分布于所述第一子帧的下行频域资源上。
  30. 根据权利要求24所述的网络设备，其特征在于，所述R组RB连续分布于所述第一子帧的下行频域资源上。
  31. 根据权利要求30所述的网络设备，其特征在于，所述第一指示信息为DCI，所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100021
  32. 根据权利要求23-31任一项所述的网络设备，其特征在于，所述第一数据为经过直接序列扩频后的数据。
  33. 根据权利要求32所述的网络设备，其特征在于，所述第一指示信息还用于指示扩频码序列或扩频码序列索引。
  34. 一种终端设备，其特征在于，应用于非授权频谱上，所述终端设备包括：
    接收单元，用于从网络设备接收第一指示信息，所述第一指示信息用于指示第一子帧中的R组资源块RB在所述第一子帧中的位置，每组RB均用于承载第一数据；
    所述接收单元，还用于通过所述第一子帧中的R组RB从所述网络设备接收所述第一数据；
    其中，每组RB的RB数为N，
    Figure PCTCN2017072693-appb-100023
    为所述第一子帧的下行资源中的RB数，R、N均为自然数。
  35. 根据权利要求34所述的终端设备，其特征在于，所述R组RB分布于所述第一子帧中不同的下行频域资源上。
  36. 根据权利要求34或35所述的终端设备，其特征在于，所述R组RB等间隔分布于所述第一子帧的下行频域资源上。
  37. 根据权利要求36所述的终端设备，其特征在于，所述第一指示信息为下行控制信息DCI，所述第一子帧的下行频域资源包括J个簇，其中，每个簇中包括
    Figure PCTCN2017072693-appb-100024
    个连续RB，各个簇中相同编号的RB作为一个交叉资源组，
    Figure PCTCN2017072693-appb-100025
    为向下取整；
    所述DCI具体用于指示调制与编码策略MCS等级以及所述交叉资源组的标识K，所述MCS等级用于指示所述第一数据的MCS等级，所述交叉资源组的标识K用于指示所述R组RB占用标识为K的交叉资源组，
    Figure PCTCN2017072693-appb-100026
    J和K均为自然数。
  38. 根据权利要求37所述的终端设备，其特征在于，N＝1，R＝J，所述MCS等级为根据所述第一数据的传输块大小TBS调整得到。
  39. 根据权利要求37所述的终端设备，其特征在于，所述MCS等级为0，N*R＝J，所述DCI还用于指示所述每组RB中的RB个数N，所述R组RB按照RB等间隔分布于所述第一子帧的下行频域资源上，所述每组RB的RB数N为根据所述第一数据的TBS调整得到。
  40. 根据权利要求36所述的终端设备，其特征在于，所述第一指示信息为DCI，所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，相邻两组RB之间间隔的RB数IRB，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100027
    所述R组RB按组等间隔分布于所述第一子帧的下行频域资源上。
  41. 根据权利要求35所述的终端设备，其特征在于，所述R组RB连续分布于所述第一子帧的下行频域资源上。
  42. 根据权利要求41所述的终端设备，其特征在于，所述第一指示信息为DCI，所述DCI具体用于指示所述每组RB中的RB个数N，RB组数R，最低频域位置的一组RB的最低RB索引
    Figure PCTCN2017072693-appb-100028
  43. 根据权利要求34-42任一项所述的终端设备，其特征在于，所述第一数据为经过直接序列扩频后的数据。
  44. 根据权利要求43所述的终端设备，其特征在于，所述第一指示信息还用于指示扩频码序列或扩频码序列索引。
  45. 一种网络设备，其特征在于，包括：处理器、存储器、总线和通信接口；所述存储器用于存储计算机执行指令，所述处理器与所述存储器通过所述总线连接，当所述网络设备运行时，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述网络设备执行如权利要求1-11中任意一项所述的物理下行共享信道PDSCH覆盖增强方法。
  46. 一种终端设备，其特征在于，包括：处理器、存储器、总线和通信接口；所述存储器用于存储计算机执行指令，所述处理器与所述存储器通过所述总线连接，当所述终端设备运行时，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述终端设备执行如权利要求12-22中任意一项所述的物理下行共享信道PDSCH覆盖增强方法。
  47. 一种通信系统，其特征在于，包括如权利要求23-33任一项所述的网络设备以及如权利要求34-44任一项所述的终端设备。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016070417A1 (en) * 2014-11-07 2016-05-12 Panasonic Intellectual Property Corporation Of America Improved resource allocation for transmissions on unlicensed carriers
WO2016119530A1 (zh) * 2015-01-30 2016-08-04 中兴通讯股份有限公司 数据传输方法、装置、基站及用户设备
CN106301733A (zh) * 2015-06-26 2017-01-04 中兴通讯股份有限公司 数据的传输方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016070417A1 (en) * 2014-11-07 2016-05-12 Panasonic Intellectual Property Corporation Of America Improved resource allocation for transmissions on unlicensed carriers
WO2016119530A1 (zh) * 2015-01-30 2016-08-04 中兴通讯股份有限公司 数据传输方法、装置、基站及用户设备
CN106301733A (zh) * 2015-06-26 2017-01-04 中兴通讯股份有限公司 数据的传输方法及装置

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