WO2016187774A1 - 控制信息的传输方法和设备 - Google Patents

控制信息的传输方法和设备 Download PDF

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Publication number
WO2016187774A1
WO2016187774A1 PCT/CN2015/079694 CN2015079694W WO2016187774A1 WO 2016187774 A1 WO2016187774 A1 WO 2016187774A1 CN 2015079694 W CN2015079694 W CN 2015079694W WO 2016187774 A1 WO2016187774 A1 WO 2016187774A1
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WIPO (PCT)
Prior art keywords
pdcch
terminal device
coverage level
configuration information
time domain
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PCT/CN2015/079694
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English (en)
French (fr)
Inventor
吴毅凌
刘铮
于光炜
罗超
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/079694 priority Critical patent/WO2016187774A1/zh
Priority to CN201580067038.3A priority patent/CN107005354A/zh
Publication of WO2016187774A1 publication Critical patent/WO2016187774A1/zh

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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

Definitions

  • the present invention relates to the field of communications, and more particularly to a method and apparatus for transmitting control information.
  • IoT Internet of Things
  • MTC Machine Type Communications
  • Typical IoT applications include smart meter reading, smart home, etc. Since the Internet of Things needs to be applied in a variety of scenarios, such as from outdoor to indoor, from above ground to underground, there are many special requirements for the design of the Internet of Things, such as Devices in the Internet of Things require low speed, low cost, low power consumption, and the like.
  • the 3rd Generation Partnership Project (English: 3rd Generation Partnership Project, 3GPP) passed a new research topic at the 62nd Plenary Session of the GSM/EDGE Radio Access Network (English: GSM EDGE Radio Acess Network, English: GERAN)
  • GSM/EDGE Radio Access Network English: GSM EDGE Radio Acess Network, English: GERAN
  • NB OFDMA Narrow-Band Orthogonal Frequency Division Multiple Access
  • the base station transmits data to the terminal device through the downlink transmission channel.
  • the terminal device receives the downlink data according to the control signaling in the Physical Downlink Control Channel ("PDCCH"), and the physical downlink shared channel (Physical Downlink Shared Channel, referred to as "PDSCH"), where the PDCCH is controlled.
  • the signaling may be specifically Downlink Control Information (DCI), and the DCI is used to instruct the terminal device to perform a series of actions, including indicating how the terminal device receives downlink data, how to send uplink data, and how to transmit power. Adjustment and so on.
  • DCI Downlink Control Information
  • relevant scheduling information such as DCI
  • the blind detection method is not suitable for the NB OFDMA system.
  • Medium application because such blind detection methods do not meet the requirements for low cost and low energy consumption.
  • the present invention provides a method and apparatus for transmitting control information that can reduce device power consumption.
  • a method for transmitting control information in a narrowband orthogonal frequency division multiple access system includes: allocating a corresponding time domain resource to a physical downlink control channel PDCCH of each coverage level of the multiple different coverage levels, where each The PDCCHs of the coverage levels are allocated different time domain resources; the configuration information is sent to the terminal device, and the configuration information includes the information of the time domain resources allocated for the PDCCH of each coverage level.
  • the method further includes: according to the time domain resource allocated to the PDCCH for each coverage level of the multiple different coverage levels, The terminal device sends the PDCCH of the different coverage levels.
  • the downlink control channel PDCCH allocation for each of the multiple different coverage levels Corresponding time domain resources include: allocating corresponding time domain resources to the PDCCHs of each coverage level according to the number of terminal devices that belong to each coverage level.
  • the downlink control is performed for each of the multiple different coverage levels
  • the channel PDCCH allocates the corresponding time domain resource, and includes: determining a repetition period of the PDCCH of each coverage level and an orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH of each coverage level.
  • the sending, by the terminal device, the configuration information including: to the terminal device Sending a broadcast message, where the broadcast message carries the configuration information; or sending a pilot signal to the terminal device, where the pilot signal carries the configuration information.
  • the second aspect provides a method for transmitting control information in a narrowband orthogonal frequency division multiple access OFDMA system, including: receiving, by a terminal device, a downlink control channel PDCCH of the coverage level according to a coverage level to which the terminal device belongs; The terminal device decodes the PDCCH of the coverage level.
  • the receiving, by the terminal device, the downlink control channel PDCCH of the coverage level according to the coverage level to which the terminal device belongs includes: receiving, by the terminal device The configuration information sent by the network device; the terminal device receives the coverage level of the terminal device according to the configuration information sent by the network device Downlink control channel PDCCH.
  • the configuration information includes a time domain resource that is allocated by the network device to a PDCCH to which the terminal device belongs information.
  • the time domain resource includes a repetition period of the PDCCH and an orthogonal frequency division occupied by the PDCCH
  • the OFDM symbol length is multiplexed.
  • the terminal device receives the terminal according to the configuration information sent by the network device Before the downlink control channel PDCCH of the coverage level to which the device belongs, the method further includes: the terminal device receiving a broadcast message sent by the network device, where the broadcast message carries the configuration information; or the terminal device receiving the And a pilot signal sent by the network device, where the pilot signal carries the configuration information.
  • a third aspect provides a network device, including: an allocating unit, configured to allocate a corresponding time domain resource to a downlink control channel PDCCH of each of a plurality of different coverage levels, where each coverage The PDCCH allocated by the PDCCH is different in time domain resources; the sending unit is configured to send configuration information to the terminal device, where the configuration information includes information about the time domain resource allocated for the PDCCH of each coverage level.
  • the sending unit is further configured to: according to the time domain resource that is allocated to the PDCCH for each of the multiple different coverage levels, The terminal device sends the PDCCH of the different coverage levels.
  • the allocating unit is specifically configured to be used according to the terminal device that belongs to each coverage level
  • the number of PDCCHs for each coverage level is allocated a corresponding time domain resource.
  • the allocating unit is further configured to determine the PDCCH of each coverage level The repetition period and the orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH of each coverage level.
  • the sending unit is specifically configured to: send a broadcast message to the terminal device
  • the broadcast message carries the configuration information; or sends a pilot to the terminal device. a signal, the pilot signal carrying the configuration information.
  • a fourth aspect provides a terminal device, including: a receiving unit, configured to receive, according to a coverage level to which the terminal device belongs, a downlink control channel PDCCH of the coverage level; and a decoding unit, where the decoding unit is configured to: Decoding the PDCCH of the coverage level.
  • the receiving unit is configured to: receive configuration information sent by a network device, and receive, according to configuration information sent by the network device, the terminal device The coverage level of the downlink control channel PDCCH.
  • the configuration information includes a time domain resource that the network device allocates to a PDCCH to which the terminal device belongs.
  • the time domain resource includes a repetition period of the PDCCH and an orthogonal frequency division occupied by the PDCCH
  • the OFDM symbol length is multiplexed.
  • the receiving unit is further configured to: receive a broadcast message sent by the network device, where the broadcast message carries the configuration information; or Receiving a pilot signal sent by the network device, where the pilot signal carries the configuration information.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.
  • FIG. 1 is a diagram of a method of transmitting control information according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing a method of transmitting control information according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of time domain multiplexing of a downlink control channel without coverage level according to an embodiment of the present invention.
  • FIG. 4 is a schematic block diagram of an apparatus in accordance with an embodiment of the present invention.
  • FIG. 5 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention.
  • Figure 6 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of a method for transmitting control information according to an embodiment of the present invention.
  • the method of Figure 1 can be performed by a base station.
  • the method includes:
  • the configuration information includes information about a time domain resource allocated for each coverage level PDCCH.
  • the network device may allocate time domain resources for the PDCCH according to the coverage level, and distinguish PDCCHs of different coverage levels in the time domain.
  • the base station sends configuration information to the terminal device, where the configuration information carries information about the time domain resources allocated by the base station for the PDCCHs of different coverage levels, so that the terminal device can receive the control information sent by the base station according to the configuration information.
  • CE Coverage Enhancement
  • MTC devices are in different environments, and coverage enhancement requirements are different. If the coverage enhancement requirement size is Coverage Class, the environment of different MTC devices is different, and the coverage levels of these MTC devices are also different. Similarly, in the case of repeated transmission, the number of repeated transmissions of MTC devices with different coverage levels is different.
  • the terminal device (for example, the MTC device) works in different coverage environments, and the system defines multiple coverage levels according to the number of terminal devices, coverage distribution, and service requirements.
  • the PDCCH of each coverage level corresponds to a terminal device that belongs to the corresponding coverage level.
  • the PDCCHs of different coverage levels are allocated according to different coverage levels of the terminal device, and the terminal device may refer to a terminal device. It may refer to a plurality of terminal devices, and the present invention is not limited thereto.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.
  • the PDCCH of different coverage levels is sent to the terminal device according to the time domain resource allocated for the PDCCH of each coverage level of the multiple different coverage levels.
  • the base station sends multiple PDCCHs of different coverage levels to the terminal device according to the time domain resources of the PDCCHs of different coverage levels, so that the terminal device will combine the configuration information sent by the received base station with the coverage measured by itself.
  • the level information decodes the PDCCH on the corresponding coverage level.
  • allocating a corresponding time domain resource to a downlink control channel PDCCH for each coverage level of the multiple coverage levels includes: according to the number of terminal devices belonging to each coverage level, The PDCCHs of the coverage levels are assigned corresponding time domain resources.
  • the PDCCH corresponding to each coverage level may also be allocated a corresponding time domain resource according to other characteristic parameters, and the present invention is not limited thereto.
  • allocating a corresponding time domain resource to a downlink control channel PDCCH for each coverage level of the multiple coverage levels includes: determining a repetition period of each PDCCH of each coverage level and each coverage The OFDM symbol length occupied by the PDCCH of the level.
  • allocating corresponding time domain resources to the downlink control channel PDCCH for each of the multiple coverage levels may further include determining a proportion of resources occupied by the PDCCH according to each coverage level, and the present invention is not limited thereto.
  • determining the repetition period of the PDCCH for each coverage level refers to the base station determining which cycle to transmit the PDCCH for each coverage level.
  • the time-frequency resource of the system based on the narrowband OFDMA can be divided into a network structure resource, and one grid occupies the smallest time-frequency unit.
  • a plurality of consecutive time-frequency resource grids are usually defined as one resource block at the time of resource allocation.
  • a physical channel (example)
  • One or more blocks are occupied, such as PDCCH or PDSCH. Therefore, different resource blocks can be allocated for PDCCHs of different coverage levels, and the repetition period of the resource blocks occupied by the PDCCH of the coverage level.
  • one radio frame length is 480 ms
  • the PDCCH period of the first coverage level is set to 80 ms
  • the PDCCH period for the second coverage level is set to 160 ms
  • the PDCCH period for the third coverage level is set to 320 ms.
  • the sending the configuration information to the terminal device includes: sending a broadcast message to the terminal device, where the broadcast message carries configuration information; or sending a pilot signal to the terminal device, where the pilot signal carries Configuration information.
  • the base station may indicate, by using a broadcast message or a pilot configuration, a time domain resource allocated by the terminal device for PDCCHs of different coverage levels, where the time domain resource includes not only the number of OFDM symbols occupied by the PDCCH of a certain coverage level or different coverage levels.
  • the proportion of resources occupied by the PDCCH further includes a repetition period of the time domain resources of the coverage level.
  • the number of terminal devices scheduled in the uplink and downlink, the number of paging terminal devices, and the like are not fixed, so the information length in the PDCCH is not fixed.
  • the MTC devices work in different coverage environments, and the required coverage levels are different.
  • the corresponding resource configurations are different under different coverage levels, so that different resources can be configured according to the device coverage level of the MTC to utilize resources more efficiently.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.
  • FIG. 2 is a schematic flowchart of a method for transmitting control information according to an embodiment of the present invention.
  • the execution body of the method may be a user terminal device.
  • the method includes:
  • the terminal device receives the downlink control channel PDCCH of the coverage level according to the coverage level to which the terminal device belongs.
  • the terminal device decodes the PDCCH of the coverage level.
  • the terminal device receives the downlink control channel PDCCH of the corresponding coverage level according to the coverage level described by itself, and decodes the scheduling information carried in the PDCCH of the coverage level.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple different coverage levels, and sends configuration information to the terminal device, where the configuration information is The information of the time domain resource allocated for the PDCCH of each coverage level is included, so that the terminal device can decode the PDCCH of the coverage level to which it belongs, and the power consumption of the terminal device can be reduced.
  • the terminal device receives the downlink control channel PDCCH of the coverage level according to the coverage level to which the terminal device belongs, where the terminal device receives the configuration information sent by the network device, and the terminal device sends the configuration information according to the network device.
  • the configuration information receives the downlink control channel PDCCH of the coverage level to which the terminal device belongs.
  • the terminal device when the terminal device receives the time domain resource of the PDCCH with different coverage levels sent by the base station, the terminal device decodes the PDCCH of the corresponding coverage level according to the configuration message sent by the received base station and the coverage level information measured by the terminal. .
  • the corresponding data is decoded according to the scheduling information carried in the PDCCH of the coverage level; if a terminal device is in the coverage level to which the terminal device belongs The corresponding scheduling information is not detected on the PDCCH, and is re-detected on the next cycle of the coverage level, or the terminal device may change the coverage level to receive the PDCCH under the new coverage level.
  • the terminal equipment of each coverage level decodes the PDCCH on the corresponding coverage level, the complexity of decoding by the terminal equipment on the channel where the PDCCHs of multiple coverage levels exist simultaneously is reduced.
  • the terminal device after decoding, by the terminal device, the PDCCH of the coverage level to which the terminal device belongs, if it is determined that there is no scheduling information required by the terminal device, the terminal device will quickly go to the sleep state, thereby further reducing the terminal device. Power consumption.
  • the configuration information includes information about a time domain resource allocated by the network device to the PDCCH to which the terminal device belongs.
  • the configuration information includes the information about the time domain resource allocated by the network device to the PDCCH to which the terminal device belongs. After receiving the configuration information sent by the base station, the terminal device can know the PDCCH of the coverage level to which the terminal device belongs according to the configuration information. Time domain resources to facilitate receiving PDCCHs of corresponding coverage levels on the time domain resources.
  • the terminal device receives, according to the configuration information sent by the network device, the downlink control channel PDCCH of the coverage level to which the terminal device belongs, where the terminal device receives the coverage level to which the terminal device belongs on the time domain resource. PDCCH.
  • the time domain resource includes a repetition period of the PDCCH and an orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH.
  • time domain resource may further include a proportion of resources occupied by the PDCCH.
  • the method before the terminal device receives the downlink control channel PDCCH of the coverage level to which the terminal device belongs according to the configuration information sent by the network device, the method further includes: receiving, by the terminal device, the broadcast message sent by the network device, The broadcast message carries a configuration message; or the terminal device receives a pilot signal sent by the network device, where the pilot signal carries a configuration message.
  • the base station may allocate a time domain resource allocated by the PDCCH indicating the coverage level to which the terminal device belongs by using a broadcast message or a pilot, where the time domain resource includes not only the number of OFDM symbols occupied by the PDCCH of the coverage level or resources occupied by the PDCCH.
  • the ratio also includes the repetition period of the time domain resource of the coverage level.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.
  • FIG. 3 is a schematic diagram of time domain multiplexing of a downlink control channel without coverage level according to an embodiment of the present invention.
  • the narrowband system based on OFDMA can be regarded as a mesh resource structure, and one grid occupies the smallest time-frequency unit.
  • a plurality of time-frequency continuous resource grids are usually treated as a resource block in resource allocation.
  • One physical channel eg, PDCCH or PDSCH
  • blocks occupied by PDCCHs of different coverage levels are distinguished by time.
  • the abscissa represents the allocation of time domain resources, the PDCCH with low coverage level is placed first, the PDCCH with medium coverage level is placed in the middle, and the PDCCH with high coverage level is placed last.
  • the design of the time division can concentrate the power of the base station to one coverage level for a short time, thereby improving the PDCCH reception performance and reducing the reception power consumption of the terminal.
  • the terminal device can quickly go to the sleep state after determining that there is no corresponding scheduling information, so that the power consumption of the terminal device can be further reduced.
  • one PDCCH block does not have to occupy the entire frequency band (for example, 180 kHz), that is, the PDCCH block can also be multiplexed in frequency with other channels such as PDSCH. Meanwhile, in one frame, there may be multiple PDCCH blocks of the same coverage level.
  • the base station may configure PDCCH blocks of different coverage levels by using a broadcast message or a pilot, and the like, including a repetition period of the PDCCH block, a length of symbol time occupied, or a proportion of resources of different coverage levels. For example, suppose a wireless frame is 480ms long, for positive For a normal coverage, you can configure a PDCCH period of 80 ms. For a medium coverage level, you can configure a PDCCH period of 160 ms. For a maximum coverage level, you can configure it to 320 ms. Then, two 480 ms periods can form a maximum coverage level of PDCCH block transmission. cycle.
  • the PDCCH configuration message is received according to different coverage levels received from the base station, and the PDCCH is decoded on the corresponding coverage level according to the coverage level information measured by itself. If it is detected that the PDCCH includes corresponding scheduling information, the corresponding data is decoded according to the scheduling information. If the corresponding PDCCH is not detected, the PDCCH waiting for the next PDCCH period or the transform coverage level is decoded at the coverage level to decode the PDCCH under the new coverage level.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.
  • the transmission method of the control information is described in detail above with reference to FIGS. 1 to 3.
  • the transmission apparatus for controlling information will be described in detail below with reference to FIGS. 4 to 7.
  • the device 400 includes:
  • the allocating unit 410 is configured to allocate a corresponding time domain resource to the downlink control channel PDCCH of each coverage level of the multiple different coverage levels, where the time domain resources allocated by the PDCCH of each coverage level are different;
  • the sending unit 420 is configured to send, to the terminal device, configuration information, where the configuration information includes information about a time domain resource allocated for each coverage level PDCCH.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH at the associated coverage level, which can reduce the power consumption of the terminal device.
  • the sending unit 420 is further configured to send a PDCCH of a different coverage level to the terminal device according to the time domain resource allocated for the PDCCH of each of the multiple different coverage levels.
  • the allocating unit 410 is specifically configured to allocate a corresponding time domain resource for each coverage level PDCCH according to the number of terminal devices that belong to each coverage level.
  • the allocating unit 410 is further configured to determine a repetition period of the PDCCH of each coverage level and an orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH of each coverage level. .
  • the sending unit 420 is specifically configured to: send a broadcast message to the terminal device, where the broadcast message carries configuration information; or send a pilot signal to the terminal device, where the pilot signal carries the configuration information.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH at the associated coverage level, which can reduce the power consumption of the terminal device.
  • FIG. 5 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention. As shown in FIG. 5, the device 500 includes:
  • the receiving unit 510 is configured to receive, according to the coverage level to which the terminal device belongs, the downlink control channel PDCCH of the coverage level;
  • the decoding unit 520 is configured to decode the PDCCH of the coverage level.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple coverage levels, and sends configuration information to the terminal device, where the configuration information includes the time allocated for the PDCCH of each coverage level.
  • the information of the domain resource so the terminal device can decode the PDCCH at the associated coverage level, which can reduce the power consumption of the terminal device.
  • the receiving unit 510 is specifically configured to: receive configuration information sent by the network device, and receive a downlink control channel PDCCH of a coverage level to which the terminal device belongs according to the configuration information sent by the network device.
  • the configuration information includes a time domain resource allocated by the network device to the PDCCH of the terminal device.
  • the time domain resource includes a repetition period of the PDCCH and an orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH.
  • the receiving unit 510 is further configured to: receive a broadcast message sent by the network device, where the broadcast message carries the configuration information; or receive a pilot signal sent by the network device, the pilot signal Carry configuration information.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple different coverage levels, and sends configuration information to the terminal device, where the configuration information is The information of the time domain resource allocated for the PDCCH of each coverage level is included, so that the terminal device can decode the PDCCH of the coverage level to which it belongs, and the power consumption of the terminal device can be reduced.
  • Figure 6 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention.
  • an embodiment of the present invention further provides a device 600, which includes a processor 601, a memory 602, a bus system 603, and a transmitter 604.
  • the processor 601, the memory 602 and the transmitter 604 are connected by a bus system 603 for storing instructions.
  • the processor 601 is configured to execute the instructions stored by the memory 602 and control the transmitter 604 to send information.
  • the processor 601 is configured to: allocate a corresponding time domain resource for a downlink control channel PDCCH of each coverage level of the multiple coverage levels, where the time domain resources of the PDCCH allocated by each coverage level are different; the transmitter 604 And configured to send configuration information to the terminal device, where the configuration information includes information about the time domain resource allocated for the PDCCH of each coverage level.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple different coverage levels, and sends configuration information to the terminal device, where the configuration information includes PDCCH allocation for each coverage level.
  • the information of the time domain resource so the terminal device can decode on the PDCCH of the associated coverage level, and the power consumption of the terminal device can be reduced.
  • the processor 601 may be a central processing unit (“CPU"), and the processor 601 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 602 can include read only memory and random access memory and provides instructions and data to the processor 601. A portion of the memory 602 may also include a non-volatile random access memory. For example, the memory 602 can also store information of the device type.
  • the bus system 603 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 603 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 601 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the transmitter 604 is further configured to: send a PDCCH of each coverage level to the terminal device according to the time domain resource allocated for the PDCCH of each of the multiple different coverage levels.
  • the processor 601 is further configured to allocate a corresponding time domain resource for each coverage level PDCCH according to the number of terminal devices that belong to each coverage level.
  • the processor 601 is further configured to: determine a repetition period of the PDCCH of each coverage level and an orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH of each coverage level.
  • the transmitter 604 is further configured to: send a broadcast message to the terminal device, where the broadcast message carries the configuration information; or send a pilot signal to the terminal device, where the pilot signal carries The configuration information.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple different coverage levels, and sends configuration information to the terminal device, where the configuration information includes PDCCH allocation for each coverage level.
  • the information of the time domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.
  • FIG. 7 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention.
  • an embodiment of the present invention further provides a device 700, which includes a processor 701, a memory 702, a bus system 703, and a receiver 7044.
  • the processor 701, the memory 702 and the receiver 704 are connected by a bus system 703 for storing instructions for executing instructions stored in the memory 702 and controlling the receiver 704 to transmit information.
  • the receiver 704 is configured to receive the downlink control channel PDCCH of the coverage level according to the coverage level to which the terminal device belongs.
  • the processor 701 is configured to: the decoding unit is configured to decode the PDCCH of the coverage level.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple different coverage levels, and sends configuration information to the terminal device, where the configuration information includes PDCCH allocation for each coverage level.
  • the information of the time domain resource so the terminal device can decode on the PDCCH of the associated coverage level, and the power consumption of the terminal device can be reduced.
  • the processor 701 may be a central processing unit (“CPU"), and the processor 701 may also be other general-purpose processors.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 702 can include read only memory and random access memory and provides instructions and data to the processor 701. A portion of the memory 702 can also include a non-volatile random access memory. For example, the memory 702 can also store information of the device type.
  • the bus system 703 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 703 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the receiver 704 is further configured to: receive configuration information sent by the network device, and the processor 701 is configured to receive, according to configuration information sent by the network device, a downlink control channel PDCCH of a coverage level to which the terminal device belongs. .
  • the configuration information includes a time domain resource allocated by the network device to the PDCCH to which the terminal device belongs.
  • the time domain resource includes a repetition period of the PDCCH and an orthogonal frequency division multiplexing OFDM symbol length occupied by the PDCCH.
  • the receiver 704 is further configured to: receive a broadcast message sent by the network device, where the broadcast message carries the configuration information; or receive a pilot signal sent by the network device, the pilot signal Carry configuration information.
  • the embodiment of the present invention allocates corresponding time domain resources to the downlink control channel PDCCH for each coverage level of the multiple different coverage levels, and sends configuration information to the terminal device, where the configuration information includes PDCCH allocation for each coverage level.
  • the information of the time domain resource so the terminal device can decode the PDCCH of the coverage level to which it belongs, and can reduce the power consumption of the terminal device.

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Abstract

本发明实施例提供一种传输控制信息的方法和设备，该方法包括：为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，每个覆盖等级的PDCCH分配的时域资源不同；向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息。本发明实施例通过为不同覆盖等级的PDCCH分配不同的时域资源，因此每个终端设备能够对所属的覆盖等级的PDCCH进行解码，从而能够降低终端设备的功耗。

Description

控制信息的传输方法和设备 技术领域
本发明涉及通信领域，更具体地，涉及一种传输控制信息的方法和设备。
背景技术
物联网(英文：Internet of things，简写：IoT)是“物物相连的互联网”。它将互联网的用户端扩展到了在任何物品与物品之间进行信息交换和通信。这样的通信方式也被称为机器间通信(英文：Machine type communications，简写：MTC)，其中的通信的节点被称为MTC终端。
典型的物联网应用包括智能抄表、智能家居等，由于物联网需要应用在多种场景中，比如从室外到室内，从地上到地下，因而对物联网的设计提出了很多特殊的要求，例如，物联网中的设备需要低速率、低成本、低能耗等。
第三代合作伙伴计划(英文：3rd Generation Partnership Project，简写：3GPP)在GSM/EDGE无线接入网(英文：GSM EDGE Radio Acess Network，英文：GERAN)62次全会上通过了一个新的研究课题来研究在蜂窝网络中支持极低复杂度和低成本的物联网的方法。其中，窄带正交频分多址(英文：Narrow-Band Orthogonal Frequency Division Multiple Access，简写：NB OFDMA)方案成为备选方案。
在NB OFDMA方案中，基站通过下行传输信道将数据传送给终端设备。终端设备根据物理下行控制信道(Physical Downlink Control Channel，简称为“PDCCH”)中的控制信令调度物理下行共享信道(Physical Downlink Shared Channel，简称为“PDSCH”)接收下行数据，其中PDCCH中的控制信令可以具体为下行控制信令(Downlink Control Information，简称为“DCI”)，DCI用于指示终端设备进行一系列行为，包括指示终端设备如何接收下行数据，怎样发送上行数据，如何进行发射功率调整等等。
然而，在采用OFDMA的LTE系统中，针对不同的信道条件下的PDCCH中的相关调度信息(如DCI)是通过终端设备盲检测方式获得的，然而这种盲检测的方式不适合在NB OFDMA系统中应用，因为这样的盲检测方式不符合对低成本和低能耗的要求。
发明内容
本发明提供一种传输控制信息的方法和设备，能够降低设备功耗。
第一方面，一种窄带正交频分多址系统中控制信息的传输方法，包括：为多个不同覆盖等级中每个覆盖等级的物理下行控制信道PDCCH分配对应的时域资源，所述每个覆盖等级的PDCCH分配的时域资源不同；向终端设备发送配置信息，所述配置信息包括所述为每个覆盖等级的PDCCH分配的时域资源的信息。
结合第一方面，在第一方面的第一种可能的实现方式中，所述方法还包括：根据所述为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向所述终端设备发送所述不同覆盖等级的PDCCH。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，包括：根据属于所述每个覆盖等级的终端设备的数量，为所述每个覆盖等级的PDCCH分配对应的时域资源。
结合第一方面或第一方面的第一至第二种可能的实现方式，在第一方面的第三种可能的实现方式中，所述为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，包括：确定所述每个覆盖等级的PDCCH的重复周期和所述每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
结合第一方面或第一方面的第一至第三种可能的实现方式，在第一方面的第四种可能的实现方式中，所述向终端设备发送配置信息，包括：向所述终端设备发送广播消息，所述广播消息中携带所述配置信息；或向所述终端设备发送导频信号，所述导频信号中携带所述配置信息。
第二方面，提供了一种窄带正交频分多址OFDMA系统中控制信息的传输方法，包括：终端设备根据所述终端设备所属的覆盖等级接收所述覆盖等级的下行控制信道PDCCH；所述终端设备对所述覆盖等级的PDCCH进行解码。
结合第二方面，在第二方面的第一种可能的实现方式中，所述终端设备根据所述终端设备所属的覆盖等级接收所述覆盖等级的下行控制信道PDCCH，包括：所述终端设备接收网络设备发送的配置信息；所述终端设备根据所述网络设备发送的配置信息接收所述终端设备所属的覆盖等级的 下行控制信道PDCCH。
结合第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，所述配置信息包括所述网络设备为所述终端设备所属的PDCCH分配的时域资源的信息。
结合第二方面的第二种可能的实现方式，在第二方面的第三种可能的实现方式中，所述时域资源包括所述PDCCH的重复周期和所述PDCCH所占的正交频分复用OFDM符号长度。
结合第二方面或第二方面的第一至第三种可能的实现方式，在第二方面的第四种可能的实现方式中，在所述终端设备根据网络设备发送的配置信息接收所述终端设备所属的覆盖等级的下行控制信道PDCCH之前，所述方法还包括：所述终端设备接收所述网络设备发送的广播消息，所述广播消息中携带所述配置信息；或所述终端设备接收所述网络设备发送的导频信号，所述导频信号中携带所述配置信息。
第三方面，提供了一种网络设备，包括：分配单元，所述分配单元用于为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，所述每个覆盖等级的PDCCH分配的时域资源不同；发送单元，所述发送单元用于向终端设备发送配置信息，所述配置信息包括所述为每个覆盖等级的PDCCH分配的时域资源的信息。
结合第三方面，在第三方面的第一种可能的实现方式中，所述发送单元具体还用于根据所述为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向所述终端设备发送所述不同覆盖等级的PDCCH。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述分配单元具体用于根据属于所述每个覆盖等级的终端设备的数量，为所述每个覆盖等级的PDCCH分配对应的时域资源。
结合第三方面或第三方面的第一至第二种可能的实现方式，在第三方面的第三种可能的实现方式中，所述分配单元还用于确定所述每个覆盖等级的PDCCH的重复周期和所述每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
结合第三方面或第三方面的第一至第三种可能的实现方式，在第三方面的第四种可能的实现方式中，所述发送单元具体用于：向所述终端设备发送广播消息，所述广播消息中携带所述配置信息；或向所述终端设备发送导频 信号，所述导频信号中携带所述配置信息。
第四方面，提供一种终端设备，包括：接收单元，所述接收单元用于根据所述终端设备所属的覆盖等级接收所述覆盖等级的下行控制信道PDCCH；解码单元，所述解码单元用于对所述覆盖等级的PDCCH进行解码。
结合第四方面，在第四方面的第一种可能的实现方式中，所述接收单元具体用于：接收网络设备发送的配置信息；根据所述网络设备发送的配置信息接收所述终端设备所属的覆盖等级的下行控制信道PDCCH。
结合第四方面的第一种可能的实现方式，在第四方面的第二种可能的实现方式中，所述配置信息包括所述网络设备为所述终端设备所属的PDCCH分配的时域资源。
结合第四方面的第二种可能的实现方式，在第四方面的第三种可能的实现方式中，所述时域资源包括所述PDCCH的重复周期和所述PDCCH所占的正交频分复用OFDM符号长度。
结合第四方面或第四方面的第一至第三种可能的实现方式，所述接收单元还用于：接收所述网络设备发送的广播消息，所述广播消息中携带所述配置信息；或接收所述网络设备发送的导频信号，所述导频信号中携带所述配置信息。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明一个实施例的控制信息的传输方法。
图2是本发明另一个实施例的控制信息的传输方法。
图3是本发明一个实施例的不用覆盖等级的下行控制信道时域复用示意图。
图4是本发明一个实施例的设备的示意性框图。
图5是本发明另一个实施例的设备的示意性框图。
图6是本发明另一个实施例的设备的示意性框图。
图7是本发明另一个实施例的设备的示意性框图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1是本发明一个实施例的控制信息的传输方法的示意性流程图。图1的方法可以由基站执行。该方法包括：
110，为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，每个覆盖等级的PDCCH分配的时域资源不同。
120，向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息。
具体地，在步骤110中，网络设备(例如基站)可以根据覆盖等级为PDCCH分配时域资源，把不同覆盖等级的PDCCH在时域上区分开。在步骤120中，基站将向终端设备发送配置信息，该配置信息中携带基站为不同覆盖等级的PDCCH分配的时域资源的信息，以便于终端设备可以根据该配置信息接收基站发送的控制信息。
具体地，在覆盖增强(英文：Coverage Enhancement，CE)方面，为使得处于地下室等路径损耗较大的MTC设备提能够接入网络获得服务，重复传输是实现覆盖增强的方法之一。因此，不同的MTC设备所处的环境不一样，覆盖增强需求也不一样。如果定义覆盖增强需求大小为覆盖等级(Coverage Class)，那么，不同的MTC设备所处的环境不一样，这些MTC设备的覆盖等级也不一样。同样以重复传输为例，覆盖等级不同的MTC设备需要进行重复传输的次数也不一样。
应理解，终端设备(例如MTC设备)工作在不同的覆盖环境下，根据终端设备的数量、覆盖分布以及业务的需求，系统定义了多个覆盖等级。因 此，每个覆盖等级的PDCCH与属于相应覆盖等级的终端设备相对应，换句话说，根据终端设备的不同覆盖等级划分了相应的不同覆盖等级的PDCCH，上述终端设备可以指一个终端设备，也可以指多个终端设备，本发明不限于此。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
可选地，作为本发明一个实施例，根据为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向终端设备发送不同覆盖等级的PDCCH。
具体地，基站将根据为不同覆盖等级的PDCCH的时域资源，向终端设备发送多个不同覆盖等级的PDCCH，以便于终端设备将根据接收到的基站发送的配置消息，并结合自身测量的覆盖等级信息在相应的覆盖等级上解码PDCCH。
可选地，作为本发明一个实施例，为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，包括：根据属于每个覆盖等级的终端设备的数量，为每个覆盖等级的PDCCH分配对应的时域资源。
应理解，还可以根据其它特性参数确定为每个覆盖等级的PDCCH分配对应的时域资源，本发明不限于此。
可选地，作为本发明一个实施例，为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，包括：确定每个覆盖等级的PDCCH的重复周期和每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
应理解，为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源还可以包括确定根据每个覆盖等级的PDCCH所占的资源比例，本发明不限于此。
应理解，确定每个覆盖等级的PDCCH的重复周期是指基站确定以何种周期发送每个覆盖等级的PDCCH。
具体地，基于窄带OFDMA的系统的时频资源可以划分为一个网状的结构资源，一个网格占用最小的一个时频单元。通常在资源分配时将多个连续的时频资源网格定义为一个资源块(block)。一般而言，一条物理信道(例 如PDCCH或PDSCH)占用一个或多个block。因此，可以为不同覆盖等级的PDCCH分配不同的资源块，以及该覆盖等级的PDCCH所占的资源块的重复周期。
具体地，例如，一个无线帧长为480ms，第一覆盖等级的PDCCH周期设置为80ms，对第二覆盖等级的PDCCH周期设置为160ms，对第三覆盖等级的PDCCH周期设置为320ms。
可选地，作为本发明一个实施例，向终端设备发送配置信息，包括：向终端设备发送广播消息，该广播消息中携带配置信息；或向终端设备发送导频信号，该导频信号中携带配置信息。
具体地，基站可以通过广播消息或者导频配置指示终端设备为不同覆盖等级的PDCCH分配的时域资源，该时域资源不仅包括某个覆盖等级的PDCCH所占用的OFDM符号数或者不同覆盖等级的PDCCH所占用的资源比例，还包括该覆盖等级的时域资源的重复周期。
由于上下行调度的终端设备数目、寻呼的终端设备数目等不固定，因此PDCCH中的信息长度也不固定。此外，MTC设备工作在不同的覆盖环境下，所需要的覆盖等级不同，在不同覆盖等级下对应的资源配置不同，这样根据MTC的设备覆盖等级配置不同的资源可以更加高效的利用资源。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
图2是本发明一个实施例的控制信息的传输方法的示意性流程图。该方法的执行主体可以为用户终端设备。该方法包括：
210，终端设备根据该终端设备所属的覆盖等级接收该覆盖等级的下行控制信道PDCCH。
220，终端设备对该覆盖等级的PDCCH进行解码。
具体地，在步骤210中，终端设备根据自己所述的覆盖等级接收相应的覆盖等级的下行控制信道PDCCH，并对该覆盖等级的PDCCH中所携带的调度信息进行解码。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息 包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
可选地，作为本发明一个实施例，终端设备根据该终端设备所属的覆盖等级接收该覆盖等级的下行控制信道PDCCH，包括：终端设备接收网络设备发送的配置信息；终端设备根据该网络设备发送的配置信息接收该终端设备所属的覆盖等级的下行控制信道PDCCH。
具体地，终端设备接收基站发送的为不同覆盖等级的PDCCH的时域资源时，终端设备将根据接收到的基站发送的配置消息，并结合自身测量的覆盖等级信息对相应的覆盖等级的PDCCH解码。
具体地，如果一个终端设备在自己所属的覆盖等级上的检测到相应的调度信息，则根据该覆盖等级的PDCCH内携带的调度信息，解码相应的数据；如果一个终端设备在其所属的覆盖等级的PDCCH上未检测到对应的调度信息，则在该覆盖等级的下一个周期上重新检测，或者，终端设备可以变换覆盖等级，接收在新的覆盖等级下的PDCCH。
由于每个覆盖等级的终端设备在对应的覆盖等级上对PDCCH进行解码，这样会减少终端设备在多个覆盖等级的PDCCH同时存在的信道上进行解码带来的复杂度。
可选地，作为本发明一个实施例，终端设备对所属的覆盖等级的PDCCH进行解码后，如果确定没有该终端设备需要的调度信息后，将快速转入休眠状态，从而可以进一步降低终端设备的功耗。
可选地，作为本发明一个实施例，配置信息包括网络设备为终端设备所属的PDCCH分配的时域资源的信息。
具体地，由于配置信息包括网络设备为终端设备所属的PDCCH分配的时域资源的信息，因此终端设备接收基站发送的配置信息后，能够根据该配置信息知道该终端设备所属的覆盖等级的PDCCH的时域资源，以便于在该时域资源上接收相应覆盖等级的PDCCH。
可选地，作为本发明一个实施例，终端设备根据网络设备发送的配置信息接收终端设备所属的覆盖等级的下行控制信道PDCCH，包括：终端设备在时域资源上接收终端设备所属的覆盖等级的PDCCH。
可选地，作为本发明一个实施例，时域资源包括PDCCH的重复周期和PDCCH所占的正交频分复用OFDM符号长度。
应理解，该时域资源还可以包括该PDCCH所占的资源比例。
可选地，作为本发明一个实施例，在终端设备根据网络设备发送的配置信息接收该终端设备所属的覆盖等级的下行控制信道PDCCH之前，方法还包括：终端设备接收网络设备发送的广播消息，该广播消息中携带配置消息；或终端设备接收网络设备发送的导频信号，该导频信号中携带配置消息。
具体地，基站可以通过广播消息或者导频配置指示终端设备所属的覆盖等级的PDCCH分配的时域资源，该时域资源不仅包括该覆盖等级的PDCCH所占用的OFDM符号数或者PDCCH所占用的资源比例，还包括该覆盖等级的时域资源的重复周期。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
图3是本发明实施例的不用覆盖等级的下行控制信道时域复用示意图。
基于OFDMA的窄带系统可以看做一个网状的资源结构，一个网格占用最小的一个时频单元。通常在资源分配中将多个时频连续的资源网格看做一个资源块(block)。一条物理信道(例如PDCCH或者PDSCH)占用一个或多个block。在本发明实施例中，不同的覆盖等级的PDCCH所占用的block通过时间来进行区分。如图3所示，横坐标表征时域资源的分配情况，低覆盖等级的PDCCH放在最前，中等覆盖等级的PDCCH放在中间，高覆盖等级的PDCCH放到最后。
因此，这种时分的设计可以将基站的功率短时间集中于一个覆盖等级，从而提高PDCCH接收性能进而减少终端的接收功耗。同时终端设备可以在解码对应的覆盖等级的PDCCH后，在确定没有对应的调度信息后快速转入睡眠状态，这样子可以进一步降低终端设备的功耗。
应注意，一个PDCCH block不是必须占用整个频带(例如，180kHz)，也就是说PDCCH block还可以和其它信道，比如PDSCH在频率上复用。同时，在一个帧中，也可能存在多个同一覆盖等级的PDCCH block。
在基站侧，基站可以通过广播消息或者导频等配置不同覆盖等级的PDCCH block，包括PDCCH block的重复周期，所占用的符号时间长度或者不同的覆盖等级的资源比例等。例如，假设一个无线帧长为480ms，对于正 常的覆盖情况，可以配置PDCCH周期为80ms；而对于中等覆盖等级，可以配置PDCCH周期为160ms；对于最大覆盖等级，可以配置为320ms，则2个480ms周期才能构成一个最大覆盖等级的PDCCH block传输周期。
在终端用户侧，根据接收来自基站的不同覆盖等级的PDCCH配置消息，并依据自身测量的覆盖等级信息在相应的覆盖等级上解码PDCCH。如果检测到该PDCCH包含对应的调度信息，则根据该调度信息解码相应的数据。如果没有检测到对应的PDCCH，则在该覆盖等级下等待下一个PDCCH周期的PDCCH或者变换覆盖等级解码在新的覆盖等级下的PDCCH。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
上面结合图1至图3从详细介绍了控制信息的传输方法，下面结合图4至图7详细介绍用于控制信息的传输设备。
图4是本发明一个实施例的设备的示意性框图。如图4所示，该设备400包括：
分配单元410，分配单元410用于为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，每个覆盖等级的PDCCH分配的时域资源不同；
发送单元420，发送单元420用于向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够在所属的覆盖等级上对PDCCH进行解码，能够降低终端设备的功耗。
可选地，作为本发明一个实施例，发送单元420具体还用于根据为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向终端设备发送不同覆盖等级的PDCCH。
可选地，作为本发明一个实施例，分配单元410具体用于根据属于每个覆盖等级的终端设备的数量，为每个覆盖等级的PDCCH分配对应的时域资源。
可选地，作为本发明一个实施例，分配单元410还用于确定所述每个覆盖等级的PDCCH的重复周期和所述每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
可选地，作为本发明一个实施例，发送单元420具体用于：向终端设备发送广播消息，广播消息中携带配置信息；或向终端设备发送导频信号，导频信号中携带所述配置信息。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够在所属的覆盖等级上对PDCCH进行解码，能够降低终端设备的功耗。
图5是本发明另一个实施例的设备的示意性框图。如图5所示，该设备500包括：
接收单元510，接收单元510用于根据终端设备所属的覆盖等级接收该覆盖等级的下行控制信道PDCCH；
解码单元520，所述解码单元用于对该覆盖等级的PDCCH进行解码。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够在所属的覆盖等级上对PDCCH进行解码，能够降低终端设备的功耗。
可选地，作为本发明一个实施例，接收单元510具体用于：接收网络设备发送的配置信息；根据网络设备发送的配置信息接收终端设备所属的覆盖等级的下行控制信道PDCCH。
可选地，作为本发明一个实施例，配置信息包括所述网络设备为所述终端设备所述的PDCCH分配的时域资源。
可选地，作为本发明一个实施例，时域资源包括PDCCH的重复周期和PDCCH所占的正交频分复用OFDM符号长度。
可选地，作为本发明一个实施例，接收单元510还用于：接收网络设备发送的广播消息，该广播消息中携带所述配置信息；或接收网络设备发送的导频信号，该导频信号中携带配置信息。
本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息 包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
图6是本发明另一个实施例的设备的示意性框图。
如图6所示，本发明实施例还提供了一种设备600，该设备600包括处理器601、存储器602、总线系统603和发送器604。其中，处理器601、存储器602和发送器604通过总线系统603相连，该存储器602用于存储指令，该处理器601用于执行该存储器602存储的指令，并控制该发送器604发送信息。其中，处理器601用于：为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，所述每个覆盖等级的PDCCH分配的时域资源不同；该发送器604用于向终端设备发送配置信息，所述配置信息包括所述为每个覆盖等级的PDCCH分配的时域资源的信息。
因此，本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够在所属的覆盖等级的PDCCH上进行解码，能够降低终端设备的功耗。
应理解，在本发明实施例中，该处理器601可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器601还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器602可以包括只读存储器和随机存取存储器，并向处理器601提供指令和数据。存储器602的一部分还可以包括非易失性随机存取存储器。例如，存储器602还可以存储设备类型的信息。
该总线系统603除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统603。
在实现过程中，上述方法的各步骤可以通过处理器601中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。 该存储介质位于存储器602，处理器601读取存储器602中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
可选地，作为本发明一个实施例，发送器604还用于：根据为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向终端设备发送每个覆盖等级的PDCCH。
可选地，作为本发明一个实施例，处理器601还用于：根据属于每个覆盖等级的终端设备的数量，为每个覆盖等级的PDCCH分配对应的时域资源。
可选地，作为本发明一个实施例，处理器601还用于：确定每个覆盖等级的PDCCH的重复周期和每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
可选地，作为本发明一个实施例，发送器604还用于：向终端设备发送广播消息，该广播消息中携带所述配置信息；或向终端设备发送导频信号，该导频信号中携带所述配置信息。
因此，本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。
图7是本发明另一个实施例的设备的示意性框图。
如图7所示，本发明实施例还提供了一种设备700，该设备700包括处理器701、存储器702、总线系统703和接收器7044。其中，处理器701、存储器702和接收器704通过总线系统703相连，该存储器702用于存储指令，该处理器701用于执行该存储器702存储的指令，并控制该接收器704发送信息。其中，该接收器704用于根据终端设备所属的覆盖等级接收该覆盖等级的下行控制信道PDCCH；处理器701用于：所述解码单元用于对该覆盖等级的PDCCH进行解码。
因此，本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够在所属的覆盖等级的PDCCH上进行解码，能够降低终端设备的功耗。
应理解，在本发明实施例中，该处理器701可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器701还可以是其他通用处理器、 数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器702可以包括只读存储器和随机存取存储器，并向处理器701提供指令和数据。存储器702的一部分还可以包括非易失性随机存取存储器。例如，存储器702还可以存储设备类型的信息。
该总线系统703除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统703。
在实现过程中，上述方法的各步骤可以通过处理器701中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器702，处理器701读取存储器702中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
可选地，作为本发明一个实施例，接收器704还用于：接收网络设备发送的配置信息；处理器701用于根据网络设备发送的配置信息接收终端设备所属的覆盖等级的下行控制信道PDCCH。
可选地，作为本发明一个实施例，配置信息包括网络设备为终端设备所属的PDCCH分配的时域资源。
可选地，作为本发明一个实施例，时域资源包括PDCCH的重复周期和PDCCH所占的正交频分复用OFDM符号长度。
可选地，作为本发明一个实施例，接收器704还用于：接收网络设备发送的广播消息，该广播消息中携带所述配置信息；或接收网络设备发送的导频信号，该导频信号中携带配置信息。
因此，本发明实施例通过为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，并向终端设备发送配置信息，该配置信息包括为每个覆盖等级的PDCCH分配的时域资源的信息，因此终端设备能够对所属的覆盖等级的PDCCH进行解码，能够降低终端设备的功耗。

Claims (20)

  1. 一种窄带正交频分多址系统中控制信息的传输方法，其特征在于，包括：
    为多个不同覆盖等级中每个覆盖等级的物理下行控制信道PDCCH分配对应的时域资源，所述每个覆盖等级的PDCCH分配的时域资源不同；
    向终端设备发送配置信息，所述配置信息包括所述为每个覆盖等级的PDCCH分配的时域资源的信息。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    根据所述为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向所述终端设备发送所述不同覆盖等级的PDCCH。
  3. 根据权利要求1或2所述的方法，其特征在于，所述为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，包括：
    根据属于所述每个覆盖等级的终端设备的数量，为所述每个覆盖等级的PDCCH分配对应的时域资源。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，包括：
    确定所述每个覆盖等级的PDCCH的重复周期和所述每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述向终端设备发送配置信息，包括：
    向所述终端设备发送广播消息，所述广播消息中携带所述配置信息；或
    向所述终端设备发送导频信号，所述导频信号中携带所述配置信息。
  6. 一种窄带正交频分多址OFDMA系统中控制信息的传输方法，其特征在于，包括：
    终端设备根据所述终端设备所属的覆盖等级接收所述覆盖等级的下行控制信道PDCCH；
    所述终端设备对所述覆盖等级的PDCCH进行解码。
  7. 根据权利要求6所述的方法，其特征在于，所述终端设备根据所述终端设备所属的覆盖等级接收所述覆盖等级的下行控制信道PDCCH，包括：
    所述终端设备接收网络设备发送的配置信息；
    所述终端设备根据所述网络设备发送的配置信息接收所述终端设备所属的覆盖等级的下行控制信道PDCCH。
  8. 根据权利要求7所述的方法，其特征在于，所述配置信息包括所述网络设备为所述终端设备所属的PDCCH分配的时域资源的信息。
  9. 根据权利要求8所述的方法，其特征在于，所述时域资源包括所述PDCCH的重复周期和所述PDCCH所占的正交频分复用OFDM符号长度。
  10. 根据权利要求7至9中任一项所述的方法，其特征在于，在所述终端设备根据网络设备发送的配置信息接收所述终端设备所属的覆盖等级的下行控制信道PDCCH之前，所述方法还包括：
    所述终端设备接收所述网络设备发送的广播消息，所述广播消息中携带所述配置信息；或
    所述终端设备接收所述网络设备发送的导频信号，所述导频信号中携带所述配置信息。
  11. 一种网络设备，其特征在于，包括：
    分配单元，所述分配单元用于为多个不同覆盖等级中每个覆盖等级的下行控制信道PDCCH分配对应的时域资源，所述每个覆盖等级的PDCCH分配的时域资源不同；
    发送单元，所述发送单元用于向终端设备发送配置信息，所述配置信息包括所述为每个覆盖等级的PDCCH分配的时域资源的信息。
  12. 根据权利要求11所述的设备，其特征在于，所述发送单元具体还用于根据所述为多个不同覆盖等级中每个覆盖等级的PDCCH分配的时域资源，向所述终端设备发送所述不同覆盖等级的PDCCH。
  13. 根据权利要求11或12所述的设备，其特征在于，所述分配单元具体用于根据属于所述每个覆盖等级的终端设备的数量，为所述每个覆盖等级的PDCCH分配对应的时域资源。
  14. 根据权利要求11至13中任一项所述的设备，其特征在于，所述分配单元还用于确定所述每个覆盖等级的PDCCH的重复周期和所述每个覆盖等级的PDCCH所占的正交频分复用OFDM符号长度。
  15. 根据权利要求11至14中任一项所述的设备，其特征在于，所述发送单元具体用于：
    向所述终端设备发送广播消息，所述广播消息中携带所述配置信息；或
    向所述终端设备发送导频信号，所述导频信号中携带所述配置信息。
  16. 一种终端设备，其特征在于，包括：
    接收单元，所述接收单元用于根据所述终端设备所属的覆盖等级接收所述覆盖等级的下行控制信道PDCCH；
    解码单元，所述解码单元用于对所述覆盖等级的PDCCH进行解码。
  17. 根据权利要求16所述的设备，其特征在于，所述接收单元具体用于：
    接收网络设备发送的配置信息；
    根据所述网络设备发送的配置信息接收所述终端设备所属的覆盖等级的下行控制信道PDCCH。
  18. 根据权利要求17所述的设备，其特征在于，所述配置信息包括所述网络设备为所述终端设备所属的PDCCH分配的时域资源。
  19. 根据权利要求18所述的设备，其特征在于，所述时域资源包括所述PDCCH的重复周期和所述PDCCH所占的正交频分复用OFDM符号长度。
  20. 根据权利要求17至19中任一项所述的设备，其特征在于，所述接收单元还用于：
    接收所述网络设备发送的广播消息，所述广播消息中携带所述配置信息；或
    接收所述网络设备发送的导频信号，所述导频信号中携带所述配置信息。
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