WO2018126665A1 - 一种切换方法、基站及终端 - Google Patents

一种切换方法、基站及终端 Download PDF

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Publication number
WO2018126665A1
WO2018126665A1 PCT/CN2017/095246 CN2017095246W WO2018126665A1 WO 2018126665 A1 WO2018126665 A1 WO 2018126665A1 CN 2017095246 W CN2017095246 W CN 2017095246W WO 2018126665 A1 WO2018126665 A1 WO 2018126665A1
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WO
WIPO (PCT)
Prior art keywords
narrow bandwidth
terminal
downlink control
bandwidth
base station
Prior art date
Application number
PCT/CN2017/095246
Other languages
English (en)
French (fr)
Inventor
张治�
陈文洪
杨宁
Original Assignee
广东欧珀移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CA3049166A priority Critical patent/CA3049166C/en
Priority to AU2017391484A priority patent/AU2017391484B2/en
Application filed by 广东欧珀移动通信有限公司 filed Critical 广东欧珀移动通信有限公司
Priority to JP2019536954A priority patent/JP7071984B2/ja
Priority to IL267842A priority patent/IL267842B2/en
Priority to SG11201906285WA priority patent/SG11201906285WA/en
Priority to CN201780082117.0A priority patent/CN110121869B/zh
Priority to MX2019008163A priority patent/MX2019008163A/es
Priority to US16/476,226 priority patent/US11032142B2/en
Priority to KR1020197020274A priority patent/KR102379843B1/ko
Priority to EP17890688.9A priority patent/EP3557828B1/en
Priority to RU2019124911A priority patent/RU2742464C1/ru
Priority to BR112019014021-2A priority patent/BR112019014021A2/pt
Priority to TW106146415A priority patent/TWI775793B/zh
Publication of WO2018126665A1 publication Critical patent/WO2018126665A1/zh
Priority to PH12019501576A priority patent/PH12019501576A1/en
Priority to ZA2019/04693A priority patent/ZA201904693B/en
Priority to US17/320,100 priority patent/US11641260B2/en
Priority to JP2022076943A priority patent/JP7401592B2/ja

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a handover method, a base station, and a terminal.
  • a terminal receives a downlink signal over the entire system bandwidth.
  • the downlink signal includes a physical downlink control channel (PDCCH) and a downlink common reference signal, such as a cell-specific reference signal (CRS) and a channel state information reference signal (Channel State Information Reference Signals, CSI-RS).
  • the system bandwidth supported by the LTE system is 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz. The typical and more widely used system bandwidths are 20MHz and 10MHz.
  • the downlink channel corresponds to 100 physical resource blocks (PRBs) and 50 PRBs, respectively.
  • PRBs physical resource blocks
  • the terminal In the existing LTE system, the terminal generally does not know the format information of the current downlink control information Downlink Control Information (DCI), and does not know where the information is needed. However, the terminal knows what information it is currently expecting. For different desired information terminals, the corresponding RNTI Radio Network Tempory Identity (RNTI) can be used to perform the Control Channel Element (CCE) information in the PDCCH. Cyclic Redundancy Check (CRC). If the CRC check succeeds, the terminal knows that the information is needed by itself, so that the corresponding DCI format and modulation mode are known, and the content of the DCI is further solved. This is the so-called blind detection process.
  • DCI Downlink Control Information
  • RNTI Radio Network Tempory Identity
  • CCE Control Channel Element
  • CRC Cyclic Redundancy Check
  • the terminal Since the terminal will always blindly check the PDCCH on the entire downlink system bandwidth, this will result in a large power consumption of the terminal.
  • the bandwidth of the carrier since the bandwidth of the carrier may be very wide, for example, it can reach 200 MHz. If the terminal still receives the PDCCH over the full bandwidth as in the LTE system, the fourth generation mobile communication technology (5-Generation, 4G) system, the power consumption of the terminal will be very high.
  • the embodiments of the present invention provide a handover method, a base station, and a terminal, which can enable a terminal to receive signals in a narrow bandwidth, which is beneficial to reducing power consumption of the terminal.
  • a first aspect of the embodiments of the present invention provides a handover method, including:
  • the base station configures a handover message of the narrow bandwidth receiving mode, where the handover message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the switching method further includes:
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the switching method further includes:
  • time information for stopping the detection of the narrowband signal and restarting the detection of the detection signal is transmitted to the terminal.
  • the handover method further includes:
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the switching method when the terminal is in the narrow bandwidth receiving mode, the switching method further includes:
  • the downlink shared channel is configured, wherein the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information sent on the narrow downlink physical downlink control channel is included in the physical downlink sharing.
  • a resource index corresponding to a frequency domain resource allocated by the channel and a modulation and coding mode of the downlink data is included in the physical downlink sharing.
  • the switching method when the terminal is in the narrow bandwidth receiving mode, the switching method further includes:
  • a second aspect of the embodiments of the present invention provides a handover method, including:
  • a handover message of the narrow bandwidth receiving mode configured by the base station, where the handover message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the switching method further includes:
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the switching method further includes:
  • the handover method further includes:
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the switching method when the terminal is in the narrow bandwidth receiving mode, the switching method further includes:
  • a physical downlink shared channel that is configured by the base station to be downlink data, where the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information received on the narrow downlink physical downlink control channel is included in the physical downlink sharing. a resource index corresponding to a frequency domain resource allocated by the channel and a modulation and coding mode of the downlink data.
  • the switching method when the terminal is in the narrow bandwidth receiving mode, the switching method further includes:
  • a third aspect of the embodiments of the present invention provides a base station, including:
  • a configuration unit configured to configure a switching message of a narrow bandwidth receiving mode, where the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • a sending unit configured to send the handover message to the terminal, to instruct the terminal to switch to receiving information on a narrow bandwidth specified by the handover message, where a width of the narrow bandwidth is smaller than a width of a system bandwidth.
  • the sending unit is further configured to send downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the configuration unit is further configured to pre-configure a duration of detecting the narrowband signal in the narrow bandwidth receiving mode by the terminal, and detecting an interval period of the narrowband signal
  • the sending unit is further configured to send the duration of detecting the narrowband signal and the interval period of detecting the narrowband signal to the terminal;
  • the sending unit is further configured to send, to the terminal, time information that stops detecting the narrowband signal and starts detecting the detection signal again.
  • the sending unit is further configured to send a frequency band index and a handover delay to the terminal after the terminal receives the information on the narrow bandwidth specified by the handover message, indicating the The terminal switches to other narrow bandwidth or other system bandwidth;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the sending unit is further configured to: when the terminal is in the narrow bandwidth receiving mode, schedule, on the narrow bandwidth physical downlink control channel, downlink data for the terminal.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information sent on the narrow downlink physical downlink control channel is included in the physical downlink sharing.
  • a resource index corresponding to a frequency domain resource allocated by the channel and a modulation and coding mode of the downlink data is included in the physical downlink sharing.
  • the sending unit is further configured to: when the terminal is in the narrow bandwidth receiving mode, send, to the terminal, an uplink transmission on the narrow bandwidth physical downlink control channel. Confirm the feedback signal and the hybrid automatic repeat process ID.
  • a fourth aspect of the present invention provides a base station, including:
  • a processor configured to call the program code stored in the memory, and performs the following operations:
  • the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the information is received over a narrow bandwidth specified by the handover message, wherein the width of the narrow bandwidth is less than the width of the system bandwidth.
  • the processor is further configured to send, by using the transceiver, downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the processor is further configured to pre-configure a duration of detecting, by the terminal, a narrowband signal in the narrow bandwidth receiving mode, and detecting an interval period of the narrowband signal, by using the transceiver Transmitting a duration of detecting the narrowband signal and detecting an interval period of detecting the narrowband signal to the terminal;
  • time information for stopping the detection of the narrowband signal and restarting the detection of the detection signal is transmitted to the terminal through the transceiver.
  • the processor is further configured to: after the terminal switches to receive the information on the narrow bandwidth specified by the handover message, send a frequency band index and a handover delay to the terminal, indicating the The terminal switches to other narrow bandwidth or other system bandwidth;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the processor is further configured to, when the terminal is in the narrow bandwidth receiving mode, schedule, for the terminal, downlink data, on the narrow bandwidth physical downlink control channel.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information sent on the narrow downlink physical downlink control channel is included in the physical downlink sharing.
  • a resource index corresponding to a frequency domain resource allocated by the channel and a modulation and coding mode of the downlink data is included in the physical downlink sharing.
  • the processor is further configured to: when the terminal is in the narrow bandwidth receiving mode, on the narrow bandwidth physical downlink control channel, through the transceiver to the terminal An acknowledgment feedback signal for the uplink transmission and a hybrid automatic retransmission process identifier are sent.
  • a fifth aspect of the embodiments of the present invention provides a terminal, including:
  • a receiving unit configured to receive a handover message that is configured by the base station to configure a narrow bandwidth receiving mode, where the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the switching unit switches to receive information on a narrow bandwidth specified by the handover message, wherein the width of the narrow bandwidth is smaller than the width of the system bandwidth.
  • the receiving unit is further configured to receive downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the receiving unit is further configured to receive, by the base station, the duration of detecting the narrowband signal in the narrow bandwidth receiving mode by the terminal preconfigured by the base station, and detecting an interval period of the narrowband signal, where Turning off the receiver during the interval period;
  • the receiving unit is further configured to: after receiving, by the terminal, the information received on the narrow bandwidth specified by the handover message, receive a frequency band index and a handover delay sent by the base station, where The switching unit is further configured to switch to other narrow bandwidth or other system bandwidth according to the frequency band index and handover delay;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the receiving unit when the terminal is in the narrow bandwidth receiving mode, is further configured to receive, by using the base station, the terminal for scheduling on the narrow bandwidth physical downlink control channel. And a physical downlink shared channel that includes downlink data, where the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information received on the narrow downlink physical downlink control channel is included in the physical downlink sharing.
  • the receiving unit when the terminal is in the narrow bandwidth receiving mode, is further configured to receive, on the narrow downlink physical downlink control channel, the uplink transmission sent by the base station. Confirmation feedback signal and hybrid automatic retransmission process identification.
  • a sixth aspect of the embodiments of the present invention provides a terminal, including:
  • a processor a memory, a transmitter, a receiver, and a bus, the processor, the memory, the transmitter, and the receiver being connected by a bus, wherein the transmitter is for transmitting a signal, and the receiver is for receiving a signal,
  • the transmitter and the receiver are respectively independently set or integrated, the memory is for storing a set of program codes, and the processor is used to call the program code stored in the memory to perform the following operations:
  • a handover message that the base station configures a narrow bandwidth reception mode, where the handover message includes a time indicating a terminal entering the narrow bandwidth reception mode and a position of a narrow bandwidth on a frequency band when entering the narrow bandwidth reception mode;
  • the processor is further configured to receive, by using the receiver, downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the processor is further configured to receive, by the receiver, a duration that the terminal pre-configured by the base station detects a duration of a narrowband signal in the narrow bandwidth receiving mode, and detects a narrowband signal. An interval period during which the receiver is turned off;
  • the processor is further configured to: after the terminal switches to receive the information on the narrow bandwidth specified by the handover message, receive, by using the receiver, a frequency band index and a handover sent by the base station. Delay, switching to other narrow bandwidth or other system bandwidth according to the frequency band index and handover delay;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the processor is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive the base station by using the receiver on the narrow bandwidth physical downlink control channel.
  • a physical downlink shared channel that includes downlink data scheduled for the terminal, where the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information received on the narrow downlink physical downlink control channel is included in the physical downlink sharing. a resource index corresponding to a frequency domain resource allocated by the channel and a modulation and coding mode of the downlink data.
  • the processor is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive the base station by using the receiver on the narrow bandwidth physical downlink control channel.
  • the acknowledgment feedback signal sent for the uplink transmission and the hybrid automatic retransmission process identifier is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive the base station by using the receiver on the narrow bandwidth physical downlink control channel.
  • a seventh aspect of the embodiments of the present invention provides a computer storage medium, the computer storage medium comprising a set of program code for performing the method according to any one of the first aspects of the embodiments of the present invention.
  • the eighth aspect of the embodiments of the present invention provides a computer storage medium, comprising a program code, for performing the method according to any implementation of the second aspect of the embodiments of the present invention.
  • a ninth aspect of the embodiments of the present invention provides a handover method, including:
  • the base station configures a handover message of the narrow bandwidth receiving mode, where the handover message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • a width of the narrow bandwidth is smaller than a width of a system bandwidth, and the narrow bandwidth includes a first narrow
  • the bandwidth or the second narrow bandwidth includes a terminal specific search space in the first narrow bandwidth physical downlink control channel, and a common search space in the second narrow bandwidth physical downlink control channel.
  • a tenth aspect of the embodiments of the present invention provides a handover method, including:
  • a handover message of the narrow bandwidth receiving mode configured by the base station, where the handover message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the physical downlink control channel includes a terminal-specific search space
  • the second narrow-bandwidth physical downlink control channel includes a common search space
  • An eleventh embodiment of the present invention provides a base station, including:
  • a configuration unit configured to configure a switching message of a narrow bandwidth receiving mode, where the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • a sending unit configured to send the handover message to the terminal, to indicate that the terminal switches to receiving information on a narrow bandwidth specified by the handover message, where a width of the narrow bandwidth is smaller than a width of a system bandwidth, where the narrow
  • the bandwidth includes a first narrow bandwidth or a second narrow bandwidth, where the first narrow bandwidth physical downlink control channel includes a terminal specific search space, and the second narrow bandwidth physical downlink control channel includes a common search space.
  • a twelfth aspect of the embodiments of the present invention provides a base station, including:
  • a processor configured to invoke program code stored in the memory to perform the steps in any of the implementations of the ninth aspect of the present invention.
  • a thirteenth aspect of the embodiments of the present invention provides a terminal, including:
  • a receiving unit configured to receive a handover message that is configured by the base station to configure a narrow bandwidth receiving mode, where the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • a switching unit configured to switch to receiving information on a narrow bandwidth specified by the handover message, where a width of the narrow bandwidth is smaller than a width of a system bandwidth, where the narrow bandwidth includes a first narrow bandwidth or a second narrow bandwidth,
  • the first narrow bandwidth physical downlink control channel includes a terminal specific search space
  • the second narrow bandwidth physical downlink control channel includes a common search space.
  • a fourteenth aspect of the embodiments of the present invention provides a terminal, including:
  • a processor a memory, a transmitter, a receiver, and a bus, the processor, the memory, the transmitter, and the receiver being connected by a bus, wherein the transmitter is for transmitting a signal, and the receiver is for receiving a signal,
  • the transmitter and the receiver are respectively independently set or integrated, the memory is for storing a set of program codes, and the processor is configured to call the program code stored in the memory to execute any one of the tenth aspects of the present invention.
  • a fifteenth aspect of the present invention provides a computer storage medium, the computer storage medium comprising a set of program code for performing the method according to any one of the ninth aspects of the embodiments of the present invention.
  • a sixteenth aspect of the present invention provides a computer storage medium, the computer storage medium comprising a set of program code for performing the method according to any one of the tenth aspects of the embodiments of the present invention.
  • the base station configures a handover message to indicate a narrow bandwidth reception mode that the terminal switches to.
  • the terminal can receive signals on a narrow bandwidth smaller than the system bandwidth, so that the terminal does not need to detect a larger system bandwidth, and the terminal can be lowered.
  • the configuration in the narrow-bandwidth PDCCH includes only the UE-specific search space and the fixed control channel unit aggregation level, which can reduce the amount of information detected by the terminal, thereby further reducing the terminal power consumption; and the base station
  • the terminal can also be instructed to detect the time of the narrowband signal when the terminal is in the narrow bandwidth receiving mode and the time when the narrowband signal is not detected, and instruct the terminal to turn off the terminal receiver when the narrowband signal is not detected, thereby further saving terminal energy consumption;
  • the terminal can be instructed to switch between narrow bandwidth and system bandwidth and between different narrow bandwidths, thereby improving the use flexibility of the narrow bandwidth; and the base station can also schedule downlink data smaller than the preset capacity or for the uplink transmission in the narrow bandwidth PDCCH. Retransmission feedback information and HARQ process identification, thereby expanding Spread the function of narrow bandwidth.
  • FIG. 1 is a schematic structural diagram of a communication system in an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a first embodiment of a handover method according to the present invention
  • FIG. 3 is a schematic flowchart of a second embodiment of a handover method according to the present invention.
  • FIG. 4 is a schematic flowchart of a third embodiment of a handover method according to the present invention.
  • FIG. 5 is a schematic diagram of receiving signals over a narrow bandwidth using the switching method shown in FIG. 4;
  • FIG. 6 is a schematic flowchart of a fourth embodiment of a handover method according to the present invention.
  • FIG. 7 is a schematic diagram of a frequency band index in the handover method shown in FIG. 6;
  • FIG. 8 is a schematic diagram of scheduling of a narrow bandwidth in the handover method shown in FIG. 6 according to the present invention.
  • FIG. 9 is a schematic flowchart of a fifth embodiment of a handover method according to the present invention.
  • FIG. 10 is a schematic flowchart diagram of a sixth embodiment of a handover method according to the present invention.
  • FIG. 11 is a schematic flowchart of a seventh embodiment of a handover method according to the present invention.
  • FIG. 12 is a schematic flowchart of an eighth embodiment of a handover method according to the present invention.
  • FIG. 13 is a schematic structural diagram of a first embodiment of a base station according to the present invention.
  • FIG. 14 is a schematic structural diagram of a second embodiment of a base station according to the present invention.
  • FIG. 15 is a schematic structural diagram of a first embodiment of a terminal according to the present invention.
  • FIG. 16 is a schematic structural diagram of a second embodiment of a terminal according to the present invention.
  • FIG. 17 is a schematic flowchart diagram of a ninth embodiment of a handover method according to the present invention.
  • FIG. 18 is a schematic flowchart diagram of a tenth embodiment of a handover method according to the present invention.
  • FIG. 19 is a schematic diagram of switching over different narrow bandwidths by using the handover method shown in FIG. 18;
  • 21 is a schematic flowchart of a twelfth embodiment of a handover method according to the present invention.
  • FIG. 22 is a schematic flowchart diagram of a thirteenth embodiment of a handover method according to the present invention.
  • FIG. 23 is a schematic flowchart diagram of a fourteenth embodiment of a handover method according to the present invention.
  • FIG. 24 is a schematic flowchart of a fifteenth embodiment of a handover method according to the present invention.
  • 25 is a schematic flowchart of a sixteenth embodiment of a handover method according to the present invention.
  • 26 is a schematic structural diagram of a third embodiment of a base station according to the present invention.
  • FIG. 27 is a schematic structural diagram of a fourth embodiment of a base station according to the present invention.
  • FIG. 28 is a schematic structural diagram of a third embodiment of a terminal according to the present invention.
  • Figure 29 is a schematic diagram showing the composition of a fourth embodiment of the terminal of the present invention.
  • the embodiment of the present invention is described in a 5G system, and those skilled in the art should understand that the embodiments in the embodiments of the present invention are equally applicable to existing communication systems and communications of higher levels such as 6G and 7G in the future.
  • the system is not limited in any way by the embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a communication system in an embodiment of the present invention.
  • the base station and the at least one terminal may be included, and the terminal may also be called a user equipment (User Equipment, UE).
  • UE User Equipment
  • the base station may be an evolved Node B (eNB), a Node B (Node B, NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), and a home base station. (for example, Home evolved NodeB, or Home Node B, HNB), BaseBand Unit (BBU), and the like. It may also be referred to by those skilled in the art as a base transceiver station, a wireless base station, a wireless transceiver, a transceiver function, a Base Station Subsystem (BSS), or some other suitable terminology.
  • eNB evolved Node B
  • BSC Base Station Controller
  • BTS Base Transceiver Station
  • HNB BaseBand Unit
  • BSS Base Station Subsystem
  • the PDCCH may carry the scheduling downlink control information, and may specifically include a transmission format, a resource allocation, an uplink scheduling permission, a power control, and an uplink retransmission information.
  • the downlink data of the service may be transmitted to the UE, and the retransmission feedback of the terminal is received.
  • the terminal may include a cellular phone, a smart phone, a session initiation protocol (Session Initiation Protocol, SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (eg, MP3 players), Camera, game console or any other device with similar functionality.
  • a terminal may also be referred to by a person skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile device. Terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client or some other suitable terminology.
  • the device can receive the control information configured by the base station and the time-frequency domain resources scheduled by the base station to perform uplink service data and retransmission feedback information.
  • the terminal can be configured to operate on a narrow bandwidth smaller than the system bandwidth.
  • the handover method of the present invention will be described in detail below with reference to FIG. 2-8.
  • the handover method includes the following steps:
  • the base station configures a handover message of a narrow bandwidth receiving mode.
  • the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the time of entering the narrow bandwidth receiving mode may include a start time of entering the narrow bandwidth receiving mode, and after receiving the switching message, the terminal enters a narrow bandwidth receiving mode at a specified starting time until receiving The base station sends a message to stop the narrow bandwidth reception mode to switch to the system bandwidth; or it can switch from the current narrow bandwidth to other narrow bandwidth or system bandwidth when receiving the message sent by the base station to switch to other narrow bandwidth or system bandwidth.
  • the time of entering the narrow bandwidth receiving mode may include the time of entering the narrow bandwidth receiving mode, or may also include the ending time of entering the narrow bandwidth receiving mode, and the terminal may enter the narrow bandwidth receiving at the specified starting time. Mode, switching back to the system bandwidth reception information at the specified termination time.
  • the downlink signal can be demodulated at 1.4 MHz, that is, 6 PRB bandwidths.
  • MTC Machine Type Communications
  • the width of the narrow bandwidth in the embodiment of the present invention is smaller than the width of the system bandwidth. That is, the narrow bandwidth in the embodiment of the present invention refers to the width in the frequency domain smaller than the system bandwidth. It is a different concept from the 1.4MHz bandwidth in existing 4G systems. For example, the typical system bandwidth of the existing 4G system is 10 MHz and 20 MHz.
  • the narrow bandwidth in the embodiment of the present invention may be a bandwidth of less than 10 MHz such as 2 MHz and 5 MHz; when the system bandwidth is 20 MHz, The narrow bandwidth in the embodiment of the present invention may be a bandwidth of less than 20 MHz such as 5 MHz, 10 MHz, 12 MHz, or the like.
  • the narrow bandwidth in the embodiment of the present invention may also be a bandwidth less than 1.4 MHz such as 0.6 MHz.
  • the narrow bandwidth can also be less than the bandwidth of the system bandwidth in a 5G system.
  • the base station may indicate, by using high layer signaling, such as Radio Resource Control (RRC), or physical layer signaling, such as DCI, that the terminal switches to a mode that only receives narrow bandwidth.
  • RRC Radio Resource Control
  • the base station can indicate the specific moment when the terminal narrowband reception mode starts, and the specific location of the narrow bandwidth in the frequency band. In this way, the terminal can switch to the specified narrow bandwidth to receive information according to the handover message.
  • the terminal In the narrow bandwidth reception mode, the terminal can retune its own RF bandwidth to a frequency domain width that is only received by the receiving system indicating the terminal, that is, a specified narrow bandwidth.
  • the terminal will tune its own radio unit to the frequency band position of the narrow bandwidth indicated by the system. On the PRB. At this point, the terminal can only receive signals located on the 6 PRBs. Due to the reduction in the receiving RF bandwidth, the terminal can obtain the effect of power saving.
  • the terminal can detect signals without using a wide system bandwidth, but only needs to receive signals and detection signals on a narrow bandwidth smaller than the system bandwidth, thereby reducing the workload of the terminal, reducing the power consumption of the terminal, and improving the terminal receiving signals. effectiveness.
  • the power consumption of the terminal is mainly embodied in two aspects.
  • the terminal detects the signal on the entire system bandwidth.
  • the terminal performs blind detection on the PDCCH, and the blind detection of the PDCCH includes detecting different control channel unit aggregation. Levels such as 2, 4, 8 and different DCI lengths, etc., the terminal detected DCI contains both DCI for a single terminal, needs to be detected in the UE-specific search space, and also contains DCI for multiple terminals, which needs to be detected in the common search space. Since the detected content is large, the power consumption of the terminal is also high. At this time, the switching method described in FIG. 3 can also be used for switching.
  • steps S301-S302 are the same as steps S201-S202 in FIG. 2, and are not further described herein.
  • the method also includes the following steps:
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the PDCCH used by the base station to schedule the terminal is located on the narrow bandwidth indicated by the base station.
  • a PDCCH located on a narrow bandwidth may carry DCI for a single different terminal without DCI for all terminals located on a narrow bandwidth; or, a PDCCH located on a narrow bandwidth only Contains a UE-specific search space without a common search space.
  • the control channel unit aggregation level may be fixed. For example, when the base station configures the narrow bandwidth reception mode to the terminal, the terminal may be assigned its control channel unit aggregation level.
  • the amount of information that the terminal needs to detect when receiving the PDCCH located on the narrow bandwidth can be reduced, thereby further reducing the terminal. Power consumption.
  • the terminal can also be configured to enter a sleep state or turn off the receiver at a specified time in the narrowband reception mode.
  • FIG. 4 is a schematic flowchart of a third embodiment of the handover method of the present invention.
  • steps S401-S403 are the same as steps S301-S303 in FIG. 3, and details are not described herein again. Includes the following steps:
  • the narrowband signal may include, but is not limited to, a PDCCH and/or a physical downlink shared signal. (Physical Downlink Shared Channel, PDSCH).
  • the base station can pre-configure the time when the terminal is in the narrow bandwidth receiving mode. Referring to FIG. 5, it is a schematic diagram of receiving signals on a narrow bandwidth by using the switching method shown in FIG. The narrow bandwidth reception mode is detected within the duration of detecting the narrowband signal as shown in FIG. 5; the base station may also pre-configure at what time the terminal does not detect the narrowband PDCCH and/or the PDSCH that may exist (the terminal at this time) The receiver can be turned off), and the interval period of the narrowband signal is detected at times T2 to T3 as shown in FIG.
  • a PDCCH Physical Downlink Shared Channel
  • the narrowband signal (narrowband PDCCH and/or PDSCH) is detected according to the configuration timing (period) of the base station, and the receiver can be turned off to achieve the power saving effect for the rest of the time.
  • the base station may also send, to the terminal, time information of stopping detecting the narrowband signal and restarting detecting the detection signal, instructing the terminal to turn off the receiver at the time of stopping detecting the narrowband signal, and start receiving at the time of starting the detection signal again.
  • a timer can be configured on the terminal for timing.
  • the terminal starts detecting the narrowband signal again.
  • the base station will pass a narrowband PDCCH, such as DCI, to indicate the specific moment when the terminal stops detecting and starts detecting again.
  • the base station may further send, to the terminal, time information for stopping detecting the narrowband signal, and instructing the terminal to control the receiver to enter a sleep state when the narrowband signal is stopped, in the sleep state, if the base station is to the
  • the terminal sends a wake-up message, and the terminal detects the wake-up message sent by the base station, and then starts the receiver.
  • the terminal can monitor the call channel and the broadcast channel at this time.
  • the terminal can turn on the receiver.
  • the terminal in the narrowband reception mode by scheduling/pre-configuration detects the narrowband signal only for part of the time, and the other terminal can turn off the receiver to further obtain the power saving effect.
  • the foregoing base station may send relevant time information to the terminal, and the terminal determines whether it is necessary to turn off the receiver in a time when the narrowband signal is not detected, or the base station may directly indicate by the base station when transmitting the relevant time information to the terminal.
  • the terminal is turned off in the time when the narrowband signal is not detected, which is not limited in the embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a fourth embodiment of a handover method according to the present invention.
  • the steps S601-S602 are the same as the steps S201-S202 in FIG. 2, and the switching method further includes the following steps:
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the frequency band index may be configured by the base station and sent to the terminal, or may be pre-stored on the base station and the terminal.
  • the terminal can determine the bandwidth to be switched by looking up the table.
  • FIG. 7 is a schematic diagram of a frequency band index in a fourth embodiment of the handover method according to the present invention.
  • different frequency band indexes point to respective possible bandwidths located at different frequency domain locations.
  • a plurality of narrow bandwidth band indexes can be configured, which are located at different frequency positions, as shown in the figure, the narrow bandwidths 1 and 2 respectively correspond to the band indexes 2, 4. It is also possible to configure a frequency band index of multiple system bandwidths at different frequency locations.
  • the system bandwidths 1 and 2 correspond to the band index 1, 3, respectively.
  • the terminal may perform handover according to the frequency band index and the handover delay.
  • the handover here may be a narrow bandwidth switch to a system bandwidth, or a narrow bandwidth switch to a narrow bandwidth.
  • FIG. 8 the schematic diagram of the narrow bandwidth scheduling in the handover method shown in FIG. 6 is used in the present invention, and the base station may use One handover delay schedules the terminal from narrow bandwidth 1 to system bandwidth 1, and another narrow handover delay can be used to schedule narrow bandwidth 2 to narrow bandwidth 3.
  • the method for sending the frequency index and the handover delay in the fourth embodiment of the handover method of the present invention may be used, which is not limited in the embodiment of the present invention.
  • steps S901-S904 are the same as steps S401-S404 in FIG. 4, and details are not described herein again.
  • the switching method further includes:
  • the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information sent on the narrow downlink physical downlink control channel includes resources corresponding to frequency domain resources allocated to the physical downlink shared channel. Index and modulation coding method of the downlink data.
  • the base station may also schedule the PDSCH containing a small amount of data for the terminal by using the PDCCH on the narrow bandwidth based on the size of the channel capacity.
  • the frequency domain resources of the PDSCH scheduled on the narrow bandwidth are located in a narrow bandwidth, and the allocated resources and Modulation and Coding Scheme (MCS) may be fixed or selected in a limited set.
  • MCS Modulation and Coding Scheme
  • the MCS in different narrow bandwidths and the allocated resources, and the mapping relationship between them may be different. For example, for narrow bandwidth 1, there is only one MCS and three possible resource allocation sets; for narrow bandwidth 2, there are two MCS and four possible resource allocation sets.
  • the different narrow bandwidths shown in Table 1, the relationship between the MCS and the allocated resources can be pre-configured through higher layer signaling, such as RRC signaling.
  • the DCI transmitted on the narrowband PDCCH may include an MCS and a resource index corresponding to the resource.
  • the resource corresponding to the narrow bandwidth 1 can be divided into two or more frequency bands, such as set1 and set2, corresponding to the resource index 1 and the resource index 2, respectively, occupying different frequency resources.
  • an acknowledgment feedback signal (ACK/NACK) and a hybrid automatic repeat request (HARQ) process identifier for uplink transmission may also be transmitted. (used to distinguish between different uplink transmission processes).
  • the function of the narrow bandwidth receiving mode can be enriched, and the role of narrow bandwidth can be expanded while ensuring low power consumption of the terminal.
  • the handover method includes:
  • S1001 The terminal receives a handover message that the base station configures a narrow bandwidth receiving mode.
  • the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • S1002 Switch to receive information on a narrow bandwidth specified by the handover message.
  • width of the narrow bandwidth is less than the width of the system bandwidth.
  • FIG. 10 is a description of an embodiment on the terminal side. For details, refer to the description of the embodiment on the base station side shown in FIG. 2, and details are not described herein again.
  • FIG. 11 is a schematic flowchart of a seventh embodiment of a handover method according to the present invention.
  • the handover method further includes:
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • FIG. 11 is a description of an embodiment on the terminal side. For details, refer to the description of the embodiment on the base station side shown in FIG. 3, and details are not described herein again.
  • the handover method further includes:
  • S1204 The terminal that is pre-configured by the base station detects narrow in the narrow bandwidth receiving mode. The duration of the band signal and the interval period during which the narrowband signal is detected, during which the receiver is turned off.
  • the method may further include:
  • the handover method further includes:
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the switching method further includes:
  • a physical downlink shared channel that is configured by the base station to be downlink data, where the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth, and the downlink control information received on the narrow downlink physical downlink control channel includes resources corresponding to the frequency domain resource allocated to the physical downlink shared channel. Index and modulation coding method of the downlink data.
  • the switching method further includes:
  • FIG. 12 is a description of an embodiment on the terminal side. For details, refer to the description of the embodiment on the base station side shown in FIG. 4 to FIG. 9 , and details are not described herein again.
  • the base station includes:
  • the configuration unit 100 is configured to configure a switching message of a narrow bandwidth receiving mode, where the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the sending unit 200 is configured to send the handover message to the terminal, to instruct the terminal to switch to receiving information on a narrow bandwidth specified by the handover message, where a width of the narrow bandwidth is smaller than a width of a system bandwidth.
  • the sending unit 200 is further configured to send downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the configuration unit 100 is further configured to pre-configure, by the terminal, a duration of detecting a narrowband signal in the narrow bandwidth receiving mode, and detecting an interval period of the narrowband signal, where the sending unit 200 is further configured to: Detecting a duration of the narrowband signal and an interval period of detecting the narrowband signal is sent to the terminal;
  • the sending unit 200 is further configured to send, to the terminal, time information that stops detecting the narrowband signal and starts detecting the detection signal again.
  • the sending unit 200 is further configured to: after the terminal switches to receive the information on the narrow bandwidth specified by the handover message, send a frequency band index and a handover delay to the terminal, and instruct the terminal to switch to another Narrow bandwidth or other system bandwidth;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the sending unit 200 is further configured to: when the terminal is in the narrow bandwidth receiving mode, schedule, on the narrow bandwidth physical downlink control channel, a physical downlink shared channel that includes downlink data for the terminal. Wherein the downlink data is less than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth
  • the downlink control information sent on the narrow downlink physical downlink control channel includes a frequency domain allocated for the physical downlink shared channel.
  • the sending unit 200 is further configured to: when the terminal is in the narrow bandwidth receiving mode, And transmitting, on the narrow bandwidth physical downlink control channel, an acknowledgement feedback signal and a hybrid automatic repeat process identifier for the uplink transmission to the terminal.
  • the base station includes:
  • a processor 110 a memory 120, a transceiver 130, and a bus 140
  • the processor 110, the memory 120, and the transceiver 130 are connected by a bus 140
  • the transceiver 130 is configured to transceive signals and communicate with a terminal
  • the memory 120 is configured to store a set of program codes
  • the processor 110 is configured to invoke the program code stored in the memory 120 to perform the following operations:
  • the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the processor 110 is further configured to send, by using the transceiver 130, downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the processor 110 is further configured to pre-configure the duration of detecting the narrowband signal in the narrow bandwidth receiving mode by the terminal, and detecting an interval period of the narrowband signal, where the narrowband is detected by the transceiver 130.
  • the duration of the signal and the interval period during which the narrowband signal is detected are sent to the terminal;
  • time information for stopping the detection of the narrowband signal and restarting the detection of the detection signal is transmitted to the terminal through the transceiver 130.
  • the processor 110 is further configured to: after the terminal switches to receive the information on the narrow bandwidth specified by the handover message, send a frequency band index and a handover delay to the terminal, and instruct the terminal to switch to another Narrow bandwidth or other system bandwidth;
  • the frequency band index is used to indicate that the terminal is to be switched to at a different frequency domain location.
  • Bandwidth the handover delay is used to indicate a time offset between a current time and a time when the terminal begins to receive a signal on a bandwidth indicated by the frequency band index.
  • the processor 110 is further configured to: when the terminal is in the narrow bandwidth receiving mode, schedule, on the narrow bandwidth physical downlink control channel, a physical downlink shared channel that includes downlink data for the terminal. Wherein the downlink data is less than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth
  • the downlink control information sent on the narrow downlink physical downlink control channel includes a frequency domain allocated for the physical downlink shared channel.
  • the processor 110 is further configured to send, by using the transceiver 130, the uplink to the terminal on the narrow bandwidth physical downlink control channel when the terminal is in the narrow bandwidth receiving mode.
  • the transmitted acknowledgement feedback signal and the hybrid automatic repeat process identification are further configured to send, by using the transceiver 130, the uplink to the terminal on the narrow bandwidth physical downlink control channel when the terminal is in the narrow bandwidth receiving mode.
  • the terminal includes:
  • the receiving unit 300 is configured to receive, by the base station, a handover message that configures a narrow bandwidth receiving mode, where the handover message includes a time indicating that the terminal enters the narrow bandwidth receiving mode, and a location of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode. ;
  • the switching unit 400 switches to receive information on a narrow bandwidth specified by the handover message, wherein the width of the narrow bandwidth is smaller than the width of the system bandwidth.
  • the receiving unit 300 is further configured to receive downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the receiving unit 300 is further configured to receive, by the base station, the duration of detecting, by the terminal, the duration of detecting the narrowband signal in the narrow bandwidth receiving mode, and the interval period of detecting the narrowband signal, where the interval period is Turn off the receiver;
  • the receiving unit 300 is further configured to: after receiving the information that the terminal switches to the narrow bandwidth specified by the handover message, receive a frequency band index and a handover delay sent by the base station, where the switching unit 400 further For switching to other narrow bandwidth or other system bandwidth according to the frequency band index and handover delay;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the receiving unit 300 is further configured to receive, on the narrow downlink physical downlink control channel, the downlink data that is sent by the base station to the terminal.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth
  • the downlink control information received on the narrow downlink physical downlink control channel includes a frequency domain allocated for the physical downlink shared channel.
  • the receiving unit 300 is further configured to receive, on the narrow downlink physical downlink control channel, an acknowledgement feedback signal sent by the base station for uplink transmission. And hybrid automatic retransmission process identification.
  • FIG. 16 it is a schematic diagram of a composition of a second embodiment of a terminal according to the present invention.
  • the terminal includes:
  • the receiver 240 is configured to receive signals, the transmitter 230 and the receiver 240 are respectively independently set or integrated, the memory 220 is configured to store a set of program codes, and the processor 210 is configured to call
  • the program code stored in the memory 220 performs the following operations:
  • a handover message that the base station configures a narrow bandwidth reception mode, where the handover message includes a time indicating that the terminal enters the narrow bandwidth reception mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth reception mode ;
  • the processor 210 is further configured to receive, by using the receiver 240, downlink control information for the terminal in a physical downlink control channel located on the narrow bandwidth;
  • the downlink control information is located in a terminal-specific search space corresponding to the terminal and uses a control channel unit aggregation level corresponding to the terminal.
  • the processor 210 is further configured to receive, by the receiver 240, a duration that the terminal pre-configured by the base station detects a duration of detecting a narrowband signal in the narrow bandwidth receiving mode, and an interval period of detecting a narrowband signal, where Turning off the receiver 240 during the interval period;
  • the receiver 240 receives the time information of the stop detection narrowband signal and the restart detection signal sent by the base station, turns off the receiver 240 at the time of stopping the detection of the narrowband signal, and turns on when the detection signal is started again.
  • the receiver 240 receives the time information of the stop detection narrowband signal and the restart detection signal sent by the base station, turns off the receiver 240 at the time of stopping the detection of the narrowband signal, and turns on when the detection signal is started again.
  • the processor 210 is further configured to: after the terminal switches to receive the information on the narrow bandwidth specified by the handover message, receive, by using the receiver 240, a frequency band index and a handover delay sent by the base station, where Switching to other narrow bandwidth or other system bandwidth according to the frequency band index and handover delay;
  • the frequency band index is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location, where the handover delay is used to indicate that the terminal starts receiving on the bandwidth indicated by the frequency band index from the current time.
  • the amount of time offset between the moments of the signal is used to indicate a bandwidth that the terminal is to be switched to at a different frequency domain location.
  • the processor 210 is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive the base station by using the receiver 240 on the narrow downlink physical downlink control channel.
  • a physical downlink shared channel that is configured by the terminal and includes downlink data, where the downlink data is smaller than a preset capacity.
  • the frequency domain resource of the physical downlink shared channel is located in the narrow bandwidth
  • the downlink control information received on the narrow downlink physical downlink control channel includes a frequency domain allocated for the physical downlink shared channel.
  • the processor 210 is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive, by using the receiver 240, the target sent by the base station, on the narrow downlink physical downlink control channel.
  • the acknowledgment feedback signal of the uplink transmission and the hybrid automatic retransmission process identifier is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive, by using the receiver 240, the target sent by the base station, on the narrow downlink physical downlink control channel.
  • the acknowledgment feedback signal of the uplink transmission and the hybrid automatic retransmission process identifier is further configured to: when the terminal is in the narrow bandwidth receiving mode, receive, by using the receiver 240, the target sent by the base station, on the narrow downlink physical downlink control channel.
  • the terminal When the terminal is in the narrow bandwidth receiving mode, if the PDCCH of the system only includes the UE-specific search space and does not include the common search space, although the power saving effect can be achieved, in some cases, the base station still needs to make the public search.
  • the space broadcasts some control signaling to the UE. At this time, you can use The method described in Figures 17-25 performs narrowband switching and detection.
  • the handover method includes the following steps:
  • the base station configures a handover message of a narrow bandwidth receiving mode.
  • the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the time of entering the narrow bandwidth receiving mode may include a start time of entering the narrow bandwidth receiving mode, and after receiving the switching message, the terminal enters a narrow bandwidth receiving mode at a specified starting time until receiving The base station sends a message to stop the narrow bandwidth reception mode to switch to the system bandwidth; or it can switch from the current narrow bandwidth to other narrow bandwidth or system bandwidth when receiving the message sent by the base station to switch to other narrow bandwidth or system bandwidth.
  • the time of entering the narrow bandwidth receiving mode may include the time of entering the narrow bandwidth receiving mode, or may also include the ending time of entering the narrow bandwidth receiving mode, and the terminal may enter the narrow bandwidth receiving at the specified starting time. Mode, switching back to the system bandwidth reception information at the specified termination time.
  • the downlink signal can be demodulated at 1.4 MHz, that is, 6 PRB bandwidths.
  • MTC Machine Type Communications
  • the downlink bandwidth becomes smaller, the power consumption of the terminal is saved.
  • the function of the terminal is subject to a relatively large limitation.
  • the width of the narrow bandwidth in the embodiment of the present invention is smaller than the width of the system bandwidth. That is, the narrow bandwidth in the embodiment of the present invention refers to the width in the frequency domain smaller than the system bandwidth. It is a different concept from the 1.4MHz bandwidth in existing 4G systems.
  • the typical system bandwidth of the existing 4G system is 10 MHz and 20 MHz.
  • the narrow bandwidth in the embodiment of the present invention may be a bandwidth of less than 10 MHz such as 2 MHz and 5 MHz; when the system bandwidth is 20 MHz, The narrow bandwidth in the embodiment of the present invention may be a bandwidth of less than 20 MHz such as 5 MHz, 10 MHz, 12 MHz, or the like.
  • the narrow bandwidth in the embodiment of the present invention may also be a bandwidth less than 1.4 MHz such as 0.6 MHz.
  • the narrow bandwidth can also be less than the bandwidth of the system bandwidth in a 5G system.
  • S1702 Send the handover message to the terminal, instructing the terminal to switch to receiving information on a narrow bandwidth specified by the handover message.
  • the base station may indicate, by using high layer signaling, such as Radio Resource Control (RRC), or physical layer signaling, such as DCI, that the terminal switches to a mode that only receives narrow bandwidth.
  • RRC Radio Resource Control
  • the base station can indicate the specific moment when the terminal narrowband reception mode starts, and the specific location of the narrow bandwidth in the frequency band. In this way, the terminal can switch to the specified narrow bandwidth to receive information according to the handover message.
  • the terminal In the narrow bandwidth reception mode, the terminal can retune its own RF bandwidth to a frequency domain width that is only received by the receiving system indicating the terminal, that is, a specified narrow bandwidth.
  • the terminal will tune its own radio unit to the frequency band position of the narrow bandwidth indicated by the system. On the PRB. At this point, the terminal can only receive signals located on the 6 PRBs. Due to the reduction in the receiving RF bandwidth, the terminal can obtain the effect of power saving.
  • the terminal can detect signals without using a wide system bandwidth, but only needs to receive signals and detection signals on a narrow bandwidth smaller than the system bandwidth, thereby reducing the workload of the terminal, reducing the power consumption of the terminal, and improving the terminal receiving signals. effectiveness.
  • the narrow bandwidth may include a first narrow bandwidth or a second narrow bandwidth, where the first narrow bandwidth physical downlink control channel includes a terminal specific search space, and the second narrow bandwidth physical downlink control channel Contains a common search space.
  • the terminal may be instructed to switch from the first narrow bandwidth to the second narrow bandwidth.
  • the first narrow bandwidth and the second narrow bandwidth are used.
  • the base station can also instruct the terminal to switch to the system bandwidth including the common search space for detection.
  • steps S1801-S1802 are the same as S1701-S1702, when needed in the first narrow bandwidth and the second narrow When the bandwidth is switched, the handover method further includes the following steps:
  • the base station configures the terminal to detect detection parameters of the first narrow bandwidth and the second narrow bandwidth, respectively.
  • the detection parameter includes a time period of detection, or includes a period of detection, a start time, and a single detection time length.
  • the base station can configure different narrow bandwidths for the terminal, some narrow bandwidths include terminal specific search spaces, and some narrow bandwidths include common search spaces.
  • the base station can directly instruct the terminal, at which time period, to detect the narrow bandwidth containing the terminal-specific search space, and at which time period to detect the narrow bandwidth containing the common search space.
  • different detection periods, start times, and single detection durations may be configured for different narrow bandwidths.
  • the detection period of the first narrow bandwidth is L1
  • the start time is T1.
  • the single detection duration is (T2-T1), and the terminal will switch to the first narrow bandwidth for detection within a fixed period of each period.
  • S1804 Send the detection parameter to the terminal, and instruct the terminal to perform handover and detection according to the detection parameter.
  • the terminal By detecting the specific configuration of the parameters, the terminal can be instructed to switch and detect on different narrow bandwidths.
  • FIG. 19 it is a schematic diagram of the present invention using the handover method shown in FIG. 18 to switch over different narrow bandwidths.
  • the first narrow bandwidth (narrow bandwidth 1, corresponding to narrowband PDCCH1) and the second narrow bandwidth (narrow bandwidth 2, corresponding to narrowband PDCCH2) are included, and the frequency domain locations of the two narrow bandwidths may be partially overlapped or They do not overlap at all (in Figure 19, there is no overlap at all).
  • the base station can configure the terminal to detect different narrow bandwidths in different time periods. As shown in FIG. 19, the terminal detects a narrow bandwidth 1 in T1 to T2 and T5 to T6; the terminal detects a narrow bandwidth 2 in T3 to T4 and T7 to T8. The time from T2 to T3, T4 to T5, and T6 to T7 is the time during which the terminal retunes between different narrow bandwidths.
  • the system can use the above time pattern to indicate when the terminal detects which narrow bandwidth, and also specifically indicate which symbols are used to detect which narrow bandwidth and which symbols are used for tuning.
  • periodic detection can be implemented by indicating the detection period, the start time, and the single detection duration.
  • the base station can configure different detection periods, start times, and single detection durations for different narrow bandwidths.
  • the period of the narrow bandwidth 1 is L1, and the starting time is T1.
  • the detection termination time may be configured as T2), and the duration of each detection is (T2- T1); the period of bandwidth 2 is L2, the starting time is T3, and the duration of each detection is (T4-T3).
  • the base station For a terminal that has entered the connected state, the base station usually does not frequently send control signaling to the terminal through the common search space, so in addition to the handover method described in FIG. 18 to FIG. 19, it can also be described by FIG. The method is to switch.
  • steps S2001-S2002 are the same as S1701-S1702, when needed in the first narrow bandwidth and the second When the narrow bandwidth is switched, the handover method further includes the following steps:
  • S2003 Send downlink control information for the terminal in a physical downlink control channel located on the first narrow bandwidth, and trigger the terminal to detect a common search space included in the second narrow bandwidth physical downlink control channel.
  • the downlink control information includes a time-frequency location where the second narrow bandwidth is located, a duration of detection of the terminal, and a narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • the base station can trigger the terminal to detect another common bandwidth included in the narrow bandwidth, such as the second narrow bandwidth (or system bandwidth), by using the DCI included in the terminal specific search space in the PDCCH transmitted on the first narrow bandwidth.
  • the terminal the time-frequency location where the second narrow bandwidth (or PDCCH) is located, the terminal detection duration, and the narrow bandwidth that the terminal needs to continue to monitor after the detection is completed may be indicated.
  • the base station may instruct the terminal to return to the original first narrow bandwidth, or allocate a new narrow bandwidth to the terminal to listen. If a new narrow bandwidth is allocated for monitoring, the terminal needs to provide a new narrow bandwidth to the terminal.
  • Information such as the location of the narrow bandwidth, the tuning time for the terminal, and the like.
  • the method of triggering the terminal to listen to the common search space by the DCI of the terminal specific search space is triggered according to the need, so the power saving effect is better.
  • the switching method described in FIG. 21 may also be used for the handover.
  • steps S2101-S2102 are the same as S1701-S1702, when needed in the first narrow bandwidth and the second When the narrow bandwidth is switched, the handover method further includes the following steps:
  • the base station is configured to detect a period of the second narrow bandwidth.
  • the downlink control information includes a time-frequency location where the second narrow bandwidth is located, a duration of detection of the terminal, and a narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • the base station can configure the terminal with a second narrow bandwidth containing a common search space, where the second narrow bandwidth can also be replaced by the system bandwidth.
  • the base station can configure a relatively long detection period for the second narrow bandwidth, so that the terminal will detect the second narrow bandwidth containing the common search space after a relatively long interval. Meanwhile, during this detection period, when there is a handover requirement, the base station may also trigger the terminal to detect the second narrow bandwidth including the common search space in the DCI of the first narrow bandwidth terminal specific search space.
  • the number of times of the triggering is not limited in the present invention, and when the detection period arrives, the terminal may detect the second narrow bandwidth common search space again according to the period, or the base station may be further configured to indicate that the terminal pauses according to the period. Detecting a preset duration of the second narrow bandwidth; sending the preset duration to the terminal, instructing the terminal to pause detecting the second narrow bandwidth according to the period during the preset duration; The first narrow bandwidth and the second narrow bandwidth need to be switched within the preset duration, and the downlink control information for the terminal is sent again in the physical downlink control channel located on the first narrow bandwidth. And triggering, by the terminal, detecting a common search space included in the second narrow bandwidth physical downlink control channel. In this way, excessive detection can be reduced and power consumption can be reduced.
  • the handover method includes the following steps:
  • S2201 The terminal receives a handover message that the base station configures a narrow bandwidth receiving mode.
  • the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • S2202 Switch to receive information on a narrow bandwidth specified by the handover message.
  • the narrow bandwidth includes a first narrow band
  • the second narrow bandwidth physical downlink control channel includes a terminal specific search space
  • the second narrow bandwidth physical downlink control channel includes a common search space.
  • FIG. 22 is a description of an embodiment on the terminal side. For details, refer to the description of the embodiment on the base station side shown in FIG. 17 , and details are not described herein again.
  • FIG. 23 it is a schematic flowchart of a fourteenth embodiment of a handover method according to the present invention.
  • the handover method when compared to the embodiment shown in FIG. 22, when the first narrow bandwidth and the second are needed, When the narrow bandwidth is switched, the handover method further includes:
  • the terminal receives the detection parameter sent by the base station.
  • the detecting parameter is that the base station configures the terminal to detect detection parameters of the first narrow bandwidth and the second narrow bandwidth respectively; the detection parameter includes a detected time period, or includes a detected period and a start time. And a single test duration.
  • S2304 The terminal performs switching and detecting according to the detection parameter.
  • FIG. 23 is a description of an embodiment of the terminal side. For the specific process, refer to the description of the embodiment on the base station side shown in FIG. 18 to FIG. 19, and details are not described herein again.
  • FIG. 24 it is a schematic flowchart of a fifteenth embodiment of a handover method according to the present invention.
  • the handover method when compared to the embodiment shown in FIG. 22, when the first narrow bandwidth and the second are required When the narrow bandwidth is switched, the handover method further includes:
  • the terminal receives, by the base station, downlink control information for the terminal in a physical downlink control channel located on the first narrow bandwidth.
  • S2404 Detect, according to the downlink control information, a common search space included in the second narrow bandwidth physical downlink control channel.
  • the downlink control information includes a time-frequency location where the second narrow bandwidth is located, a duration of detection by the terminal, and a narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • FIG. 24 is a description of an embodiment on the terminal side. For the specific process, refer to the description of the embodiment on the base station side shown in FIG. 20, and details are not described herein again.
  • the handover method when the switching between the first narrow bandwidth and the second narrow bandwidth is required, the handover method further includes:
  • the terminal receives information about a period of detecting the second narrow bandwidth configured by the base station.
  • S2504 Detect, according to the period, a common search space included in the second narrow bandwidth physical downlink control channel.
  • the terminal detects the second narrow The common search space contained in the physical downlink control channel of the bandwidth.
  • the downlink control information includes a time-frequency location where the second narrow bandwidth is located, a duration of detection by the terminal, and a narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • the handover method further includes:
  • the terminal detects the second narrow The common search space contained in the physical downlink control channel of the bandwidth.
  • FIG. 25 is a description of an embodiment on the terminal side. For details, refer to the description of the embodiment on the base station side shown in FIG. 21, and details are not described herein again.
  • the base station includes:
  • the configuration unit 500 is configured to configure a switching message of the narrow bandwidth receiving mode, where the switching message includes a time indicating that the terminal enters the narrow bandwidth receiving mode and a position of the narrow bandwidth in the frequency band when entering the narrow bandwidth receiving mode;
  • the sending unit 600 is configured to send the handover message to the terminal, to instruct the terminal to switch to receiving information on a narrow bandwidth specified by the handover message, where a width of the narrow bandwidth is smaller than a width of a system bandwidth,
  • the narrow bandwidth includes a first narrow bandwidth or a second narrow bandwidth, the first narrow bandwidth physics
  • the downlink control channel includes a terminal-specific search space, and the second narrow-bandwidth physical downlink control channel includes a common search space.
  • the configuration unit 500 is further configured to configure the terminal to detect the first narrow bandwidth and the second narrow respectively.
  • a detection parameter of the bandwidth includes a time period of detection, or includes a period of detection, a start time, and a single detection time length;
  • the sending unit 600 is further configured to send the detection parameter to the terminal, and instruct the terminal to perform switching and detecting according to the detection parameter.
  • the sending unit 600 is further configured to send, in the physical downlink control channel located on the first narrow bandwidth,
  • the downlink control information of the terminal is used to trigger the terminal to detect a common search space included in the second narrow bandwidth physical downlink control channel;
  • the downlink control information includes a time-frequency location and a terminal where the second narrow bandwidth is located The duration of the detection is detected and the narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • the configuration unit 500 is further configured to configure a period for detecting the second narrow bandwidth
  • the sending unit 600 is further configured to send the information of the period to the terminal, and instruct the terminal to detect a common search space included in the second narrow bandwidth physical downlink control channel according to the period;
  • the transmitting unit 600 is further configured to send in the physical downlink control channel located on the first narrow bandwidth, if the first narrow bandwidth and the second narrow bandwidth are to be switched in the period. And the downlink control information of the terminal is triggered, the terminal is configured to detect a common search space included in the second narrow bandwidth physical downlink control channel; and the downlink control information includes a time-frequency location where the second narrow bandwidth is located The duration of the terminal detection and the narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • the configuration unit 500 is further configured to indicate that the terminal is suspended according to the period. Detecting a preset duration of the second narrow bandwidth;
  • the sending unit 600 is further configured to send the preset duration to the terminal, and instruct the terminal to pause to detect the second narrow bandwidth according to the period within the preset duration;
  • the sending unit 600 is further configured to send the downlink control information for the terminal in the physical downlink control channel located on the first narrow bandwidth, and trigger the terminal to detect the physical downlink control of the second narrow bandwidth.
  • the common search space contained in the channel is further configured to send the downlink control information for the terminal in the physical downlink control channel located on the first narrow bandwidth, and trigger the terminal to detect the physical downlink control of the second narrow bandwidth.
  • the base station includes:
  • the processor 310, the memory 320, the transceiver 330, and the bus 340, the processor 310, the memory 320, and the transceiver 330 are connected by a bus 340, wherein the transceiver 330 is configured to transceive signals and communicate with the terminal,
  • the memory 320 is configured to store a set of program code
  • the processor 310 is configured to invoke program code stored in the memory 320 to perform the steps in any of the embodiments of Figures 17-21 of the present invention.
  • the terminal includes:
  • the receiving unit 700 is configured to receive, by the base station, a handover message that configures a narrow bandwidth reception mode, where the handover message includes a time indicating that the terminal enters the narrow bandwidth reception mode and a location of the narrow bandwidth in the frequency band when entering the narrow bandwidth reception mode. ;
  • the switching unit 800 is configured to switch to receiving information on a narrow bandwidth specified by the handover message, where a width of the narrow bandwidth is smaller than a width of a system bandwidth, where the narrow bandwidth includes a first narrow bandwidth or a second narrow bandwidth.
  • the physical downlink control channel of the first narrow bandwidth includes a terminal-specific search space, and the second narrow bandwidth physical downlink control channel includes a common search space.
  • the receiving unit 700 when receiving the switching between the first narrow bandwidth and the second narrow bandwidth, is further configured to receive a detection parameter sent by the base station, where the detection parameter is configured by the base station.
  • the detecting parameters of the first narrow bandwidth and the second narrow bandwidth are respectively detected by the terminal; the detecting parameter includes a detected time period, or includes a detected period, a starting time, and a single detecting duration;
  • the switching unit 800 is further configured to perform switching and detecting according to the detection parameter.
  • the receiving unit 700 when receiving the switching between the first narrow bandwidth and the second narrow bandwidth, is further configured to receive, by the base station, a physical downlink control channel located on the first narrow bandwidth. Transmitting downlink control information for the terminal;
  • the switching unit 800 is further configured to: detect, according to the downlink control information, a common search space included in the second narrow bandwidth physical downlink control channel; where the downlink control information includes a time frequency of the second narrow bandwidth The location, the duration of the terminal detection, and the narrow bandwidth that the terminal needs to monitor after the detection is completed.
  • the receiving unit 700 when receiving the switching between the first narrow bandwidth and the second narrow bandwidth, is further configured to receive, by the base station, information for detecting a period of the second narrow bandwidth;
  • the switching unit 800 is further configured to detect, according to the period, a common search space included in the second narrow bandwidth physical downlink control channel;
  • the switching unit 800 further a common search space included in the physical downlink control channel for detecting the second narrow bandwidth; the downlink control information includes a time-frequency location where the second narrow bandwidth is located, a duration of detection of the terminal, and a terminal required after the detection is completed.
  • the narrow bandwidth of the monitor if the receiving unit 700 receives downlink control information for the terminal that is sent by the base station in a physical downlink control channel located on the first narrow bandwidth, the switching unit 800 further a common search space included in the physical downlink control channel for detecting the second narrow bandwidth; the downlink control information includes a time-frequency location where the second narrow bandwidth is located, a duration of detection of the terminal, and a terminal required after the detection is completed.
  • the narrow bandwidth of the monitor is a configurable.
  • the receiving unit 700 is further configured to receive, by the base station, a Determining, by the terminal, the preset duration of detecting the second narrow bandwidth according to the period;
  • the switching unit 800 is further configured to pause to detect the second narrow bandwidth according to the period during the preset duration;
  • the receiving unit 700 receives the downlink control information for the terminal that is sent by the base station in the physical downlink control channel located on the first narrow bandwidth
  • the switching unit is again received within the preset duration.
  • the 800 is further configured to detect a common search space included in the second narrow bandwidth physical downlink control channel.
  • the terminal includes:
  • the processor 410, the memory 420, the transmitter 430, the receiver 440, and the bus 450 are connected by a bus 450, wherein the transmitter 430 is configured to transmit a signal.
  • the receiver 440 is configured to receive signals, the transmitter 430 and the receiver 440 are respectively independently set or integrated, the memory 420 is configured to store a set of program codes, and the processor 410 is configured to call
  • the program code stored in the memory 420 is executed as 22-25 are steps in any of the embodiments.
  • the base station introduced in this embodiment may be used to implement some or all of the processes in the method embodiments introduced in conjunction with FIG. 2-6, FIG. 17-21, and the device described in connection with FIG. 13 and FIG.
  • the terminal introduced in this embodiment may be used to implement some or all of the processes in the method embodiments introduced in conjunction with FIG. 7 to FIG. 9 and FIG. 22 to FIG. 25, and to implement the present invention.
  • Some or all of the functions of the device embodiment introduced in conjunction with FIG. 15 and FIG. 28 are not described herein again.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or code via a computer-readable medium and executed by a hardware-based processing unit.
  • the computer readable medium can comprise a computer readable storage medium (which corresponds to a tangible medium such as a data storage medium) or a communication medium comprising, for example, any medium that facilitates transfer of the computer program from one place to another in accordance with a communication protocol. .
  • computer readable media generally may correspond to (1) a non-transitory tangible computer readable storage medium, or (2) a communication medium such as a signal or carrier wave.
  • Data storage media may be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, code and/or data structures for use in carrying out the techniques described herein.
  • the computer program product can comprise a computer readable medium.
  • certain computer-readable storage media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, flash memory, or may be used to store instructions or data structures. Any other medium in the form of the desired program code and accessible by the computer. Also, any connection is properly termed a computer-readable medium. For example, if you use coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (eg, infrared, radio, and microwave) to send commands from a website, server, or other remote source, coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies (eg, infrared, radio, and microwave) are included in the definition of the media.
  • coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology eg, infrared, radio, and microwave
  • a magnetic disk and an optical disk include a compact disk (CD), a laser disk, an optical disk, a digital video disk (DVD), a flexible disk, and a Blu-ray disk, wherein the disk usually reproduces data magnetically, and the disk passes the laser Optically copy data.
  • CD compact disk
  • DVD digital video disk
  • a flexible disk a hard disk
  • Blu-ray disk wherein the disk usually reproduces data magnetically, and the disk passes the laser Optically copy data.
  • the combination of the above should also be included in the computer readable media Inside.
  • processors such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable logic arrays
  • processors may refer to any of the foregoing structures or any other structure suitable for implementing the techniques described herein.
  • the functionality described herein may be provided within dedicated hardware and/or software modules configured for encoding and decoding, or incorporated in a combined codec.
  • the techniques can be fully implemented in one or more circuits or logic elements.
  • the techniques of the present invention can be broadly implemented by a variety of devices or devices, including a wireless handset, an integrated circuit (IC), or a collection of ICs (eg, a chipset).
  • IC integrated circuit
  • Various components, modules or units are described in this disclosure to emphasize functional aspects of the apparatus configured to perform the disclosed techniques, but are not necessarily required to be implemented by different hardware units. Rather, as described above, various units may be combined in a codec hardware unit or combined with suitable software and/or by a collection of interoperable hardware units (including one or more processors as described above). Or firmware to provide.
  • system and “network” are used interchangeably herein. It should be understood that the term “and/or” herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined from A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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Abstract

本发明实施例公开一种切换方法、基站及终端，方法包括：基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。采用本发明实施例，可使得终端在窄带宽接收信号，利于降低终端的功耗。

Description

一种切换方法、基站及终端 技术领域
本发明涉及通信技术领域，尤其涉及一种切换方法、基站及终端。
背景技术
在长期演进(Long Term Evolution，LTE)系统中，终端在整个系统带宽上接收下行信号。其中，下行信号包括物理下行控制信道(Physical Downlink Control Channel，PDCCH)和下行公共参考信号如小区特定参考信号(Cell-specific Reference Signals，CRS)和信道状态信息测量参考信号(Channel State Information Reference Signals，CSI-RS)。LTE系统支持的系统带宽有1.4MHz、3MHz、5MHz、10MHz、15MHz和20MHz。其中比较典型、应用较多的系统带宽是20MHz和10MHz。在下行信道分别对应100个物理资源块(Physical Resource Block，PRB)和50个PRB。
在现有的LTE系统中，终端一般不知道当前下行控制信息Downlink Control Information，DCI)传送的是什么格式(format)的信息，也不知道自己需要的信息在哪个位置。但是终端知道自己当前在期待什么信息，对于不同的期望信息终端可以用相应的无线网络临时标识(RNTI Radio Network Tempory Identity，RNTI)去和PDCCH中的控制信道单元(Control Channel Element，CCE)信息做循环冗余校验(Cyclic Redundancy Check，CRC)，如果CRC校验成功，那么终端就知道这个信息是自己需要的，从而获知相应的DCI format和调制方式，进一步解出DCI的内容。这就是所谓的盲检(blind detection)过程。由于终端会一直在整个下行系统带宽上盲检PDCCH，这样会导致终端的功耗较大。尤其在第五代移动通信技术(5-Generation，5G)系统以及后续系统带宽较大的移动通信技术系统中，由于载波的带宽可能非常宽，例如可达到200MHz。如果终端仍然像在LTE系统即第四代移动通信技术(5-Generation，4G)系统中一样在全带宽上接收PDCCH，那样终端的功耗将非常高。
发明内容
本发明实施例提供了一种切换方法、基站及终端，可使得终端在窄带宽接收信号，利于降低终端的功耗。
本发明实施例第一方面提供一种切换方法，包括：
基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
在一种可能的实现方式中，所述切换方法还包括：
在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在一种可能的实现方式中，所述切换方法还包括：
预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
或者，向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
在一种可能的实现方式中，在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，所述切换方法还包括：
向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
在一种可能的实现方式中，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物 理下行共享信道，其中，所述下行数据小于预设容量。
在一种可能的实现方式中，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
在一种可能的实现方式中，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
在所述窄带宽的物理下行控制信道上，向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
本发明实施例第二方面提供一种切换方法，包括：
终端接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
在一种可能的实现方式中，所述切换方法还包括：
接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在一种可能的实现方式中，所述切换方法还包括：
接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机；
或者，接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。
在一种可能的实现方式中，在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，所述切换方法还包括：
接收所述基站发送的频带索引和切换时延，根据所述频带索引和切换时延 切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
在一种可能的实现方式中，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
在所述窄带宽的物理下行控制信道上，接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
在一种可能的实现方式中，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
在一种可能的实现方式中，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
在所述窄带宽的物理下行控制信道上，接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
本发明实施例第三方面提供一种基站，包括：
配置单元，用于配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
发送单元，用于向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
在一种可能的实现方式中，所述发送单元还用于在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在一种可能的实现方式中，所述配置单元还用于预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，所述 发送单元还用于将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
或者，所述发送单元还用于向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
在一种可能的实现方式中，所述发送单元还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
在一种可能的实现方式中，所述发送单元还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
在一种可能的实现方式中，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
在一种可能的实现方式中，所述发送单元还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
本发明第四方面提供一种基站，包括：
处理器、存储器、收发器和总线，所述处理器、存储器和收发器通过总线连接，其中，所述收发器用于收发信号，与终端进行通信，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行以下操作：
配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
通过所述收发器向所述终端发送所述切换消息，指示所述终端切换到所述 切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
在一种可能的实现方式中，所述处理器还用于通过所述收发器在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在一种可能的实现方式中，所述处理器还用于预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，通过所述收发器将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
或者，通过所述收发器向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
在一种可能的实现方式中，所述处理器还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
在一种可能的实现方式中，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
在一种可能的实现方式中，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
在一种可能的实现方式中，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述收发器向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
本发明实施例第五方面提供一种终端，包括：
接收单元，用于接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换单元，切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
在一种可能的实现方式中，所述接收单元还用于接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在一种可能的实现方式中，所述接收单元还用于接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机；
或者，接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。
在一种可能的实现方式中，所述接收单元还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，接收所述基站发送的频带索引和切换时延，所述切换单元还用于根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
在一种可能的实现方式中，当所述终端处于所述窄带宽接收模式时，所述接收单元还用于在所述窄带宽的物理下行控制信道上，接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
在一种可能的实现方式中，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调 制编码方式。
在一种可能的实现方式中，当所述终端处于所述窄带宽接收模式时，所述接收单元还用于在所述窄带宽的物理下行控制信道上，接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
本发明实施例第六方面提供一种终端，包括：
处理器、存储器、发射机、接收机和总线，所述处理器、存储器、发射机和接收机通过总线连接，其中，所述发射机用于发射信号，所述接收机用于接收信号，所述发射机和所述接收机分别独立设置或集成设置，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行以下操作：
通过所述接收机接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
在一种可能的实现方式中，所述处理器还用于通过所述接收机接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在一种可能的实现方式中，所述处理器还用于通过所述接收机接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭所述接收机；
或者，通过所述接收机接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭所述接收机并在再次开始检测信号的时刻开启所述接收机。
在一种可能的实现方式中，所述处理器还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，通过所述接收机接收所述基站发送的频带索引和切换时延，根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
在一种可能的实现方式中，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述接收机接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
在一种可能的实现方式中，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
在一种可能的实现方式中，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述接收机接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
本发明实施例第七方面提供了一种计算机存储介质，所述计算机存储介质包括一组程序代码，用于执行如本发明实施例第一方面任一实现方式所述的方法。
本发明实施例第八方面提供了一种计算机存储介质，所述计算机存储介质包括一组程序代码，用于执行如本发明实施例第二方面任一实现方式所述的方法。
本发明实施例第九方面提供了一种切换方法，包括：
基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度，所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
本发明实施例第十方面提供了一种切换方法，包括：
终端接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度,所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
本发明实施例第十一方面提供了一种基站，包括：
配置单元，用于配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
发送单元，用于向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度，所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
本发明实施例第十二方面提供了一种基站，包括：
处理器、存储器、收发器和总线，所述处理器、存储器和收发器通过总线连接，其中，所述收发器用于收发信号，与终端进行通信，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行如本发明第九方面任一实现方式中的步骤。
本发明实施例第十三方面提供了一种终端，包括：
接收单元，用于接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换单元，用于切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度,所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
本发明实施例第十四方面提供了一种终端，包括：
处理器、存储器、发射机、接收机和总线，所述处理器、存储器、发射机和接收机通过总线连接，其中，所述发射机用于发射信号，所述接收机用于接收信号，所述发射机和所述接收机分别独立设置或集成设置，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行如本发明第十方面任一实现方式中的步骤。
本发明实施例第十五方面提供了一种计算机存储介质，所述计算机存储介质包括一组程序代码，用于执行如本发明实施例第九方面任一实现方式所述的方法。
本发明实施例第十六方面提供了一种计算机存储介质，所述计算机存储介质包括一组程序代码，用于执行如本发明实施例第十方面任一实现方式所述的方法。
实施本发明实施例，具有如下有益效果：
基站通过配置切换消息，指示终端切换到的窄带宽接收模式，在窄带宽接收模式下，终端可以在小于系统带宽的窄带宽上接收信号，使得终端无需再检测较大的系统带宽，可以降低终端的功耗和检测信号的时延；在窄带宽的PDCCH中配置只含有UE特定搜索空间和固定的控制信道单元聚合等级，可以减少终端检测的信息量，从而可以进一步降低终端功耗；且基站还可以指示终端处于窄带宽接收模式下时检测窄带信号的时间和不检测窄带信号的时间，并指示终端在不检测窄带信号的时候关闭终端接收机，从而可以更进一步节省终端能耗；基站还可以指示终端在窄带宽和系统带宽之间以及不同窄带宽之间切换，从而提升窄带宽的使用灵活性；而且基站还可以在窄带宽的PDCCH中调度小于预设容量的下行数据或针对上行传输的重传反馈信息和HARQ进程标识，从而扩展了窄带宽的功能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的 前提下，还可以根据这些附图获得其他的附图。
图1为本方面实施例中通信系统的架构示意图；
图2为本发明切换方法第一实施例的流程示意图；
图3为本发明切换方法第二实施例的流程示意图；
图4为本发明切换方法第三实施例的流程示意图；
图5为采用图4所示切换方法在窄带宽上接收信号的示意图；
图6为本发明切换方法第四实施例的流程示意图；
图7为采用图6所示切换方法中频带索引的示意图；
图8为本发明采用图6所示切换方法中窄带宽的调度示意图；
图9为本发明切换方法第五实施例的流程示意图；
图10为本发明切换方法第六实施例的流程示意图；
图11为本发明切换方法第七实施例的流程示意图；
图12为本发明切换方法第八实施例的流程示意图；
图13为本发明基站的第一实施例的组成示意图；
图14为本发明基站的第二实施例的组成示意图；
图15为本发明终端的第一实施例的组成示意图；
图16为本发明终端的第二实施例的组成示意图；
图17为本发明切换方法第九实施例的流程示意图；
图18为本发明切换方法的第十实施例的流程示意图；
图19为本发明采用图18所示切换方法在不同窄带宽上切换的示意图；
图20为本发明切换方法的第十一实施例的流程示意图；
图21为本发明切换方法的第十二实施例的流程示意图；
图22为本发明切换方法的第十三实施例的流程示意图；
图23为本发明切换方法的第十四实施例的流程示意图；
图24为本发明切换方法的第十五实施例的流程示意图；
图25为本发明切换方法的第十六实施例的流程示意图；
图26为本发明基站的第三实施例的组成示意图；
图27为本发明基站的第四实施例的组成示意图；
图28为本发明终端的第三实施例的组成示意图；
图29为本发明终端的第四实施例的组成示意图。
具体实施方式
本发明的说明书和权利要求书及上述附图中的术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或装置没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或装置固有的其它步骤或单元。
随着人们通信需求的不断提高，通信技术正快速发展，可以为用户提供更大的带宽，更快的上下行传输速度等。例如，在5G系统中，可以提供高达200MHz的系统带宽。但是随着系统带宽的扩展，如果终端在比较大的系统带宽上接收PDCCH，终端的功耗较高，因此，本发明实施例提供了一种切换方法，使得终端可以切换到小于系统带宽的窄带宽上工作，从而节省终端功耗。为了便于说明，本发明实施例中以5G系统来进行描述，本领域技术人员应当理解，本发明实施例中的实施方式同样可适用于现有通信系统以及未来更高级别如6G、7G的通信系统，本发明实施例不作任何限定。
下面结合附图对本发明实施例的切换方法及设备进行详细说明。
请参照图1，为本方面实施例中通信系统的架构示意图。其中可以包括基站和至少一个终端，终端也可生称之为用户设备(User Equipment，UE)。
其中，基站可以是演进型节点B(evolved Node B，eNB)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station,BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(BaseBand Unit，BBU)等。其也可以被本领域技术人员称之为基站收发机、无线基站、无线收发机、收发机功能、基站子系统(Base Station Sub system，BSS)或者一些其它适当的术语。其可以在PDCCH中承载调度下行控制信息，可具体包含传输格式、资源分配、上行调度许可、功率控制以及上行重传信息等。并可以向UE传输业务的下行数据，接收终端的重传反馈等。
其中，终端可以包括蜂窝电话、智能电话、会话启动协议 (Session Initiation Protocol，SIP)电话、膝上型计算机、个人数字助理(Personal Digital Assistant，PDA)、卫星无线电、全球定位系统、多媒体设备、视频设备、数字音频播放器(例如，MP3播放器)、照相机、游戏控制台或者其它任何相似功能的设备。终端也可以被本领域技术人员称为移动站、用户站、移动单元、用户单元、无线单元、远程单元、移动设备、无线设备、无线通信设备、远程设备、移动用户站、接入终端、移动终端、无线终端、远程终端、手持设备、用户代理、移动客户端、客户端或者一些其它适当的术语。其可以接收基站配置的控制信息以及基站调度的时频域资源来进行上行业务数据以及重传反馈信息的传输。
为了降低终端的功耗，本发明实施例中可以配置终端在小于系统带宽的窄带宽上工作，下面将结合图2-图8对本发明的切换方法进行详细说明。
请参照图2，为本发明切换方法的第一实施例的流程示意图；在本实施例中，所述切换方法包括以下步骤：
S201，基站配置窄带宽接收模式的切换消息。
其中，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
可选地，进入所述窄带宽接收模式的时间可以包含进入所述窄带宽接收模式的起始时间，终端接收到该切换消息后，在指定的起始时间进入窄带宽接收模式，直至接收到基站发送的停止窄带宽接收模式的消息时切换到系统带宽；或者也可以在接收到基站发送的切换到其他窄带宽或系统带宽的消息时，从当前窄带宽切换到其他窄带宽或系统带宽。
进入所述窄带宽接收模式的时间除了包含进入所述窄带宽接收模式的时间之外，或者还可以包含进入所述窄带宽接收模式的终止时间，终端可以在指定的起始时间进入窄带宽接收模式，在指定的终止时间切换回系统带宽接收信息。
需要说明的是，对于支持机器通信(Machine Type Communications，MTC)的终端而言，可以在1.4MHz即6个PRB带宽上去解调下行信号。对于此种类型终端，由于下行带宽变小，终端的功耗得以节约。但是由于此类终端只能 工作在较窄的带宽上，如6个PRB上，终端的功能会受比较大的限制。本发明实施例中的窄带宽的宽度小于系统带宽的宽度，即本发明实施例中窄带宽是指小于系统带宽的频率域上的宽度。与现有4G系统中的1.4MHz的带宽是不同的概念。例如，现有4G系统中比较典型的系统带宽为10MHz和20MHz，当系统带宽为10MHz时，本发明实施例中的窄带宽可以是2MHz、5MHz等小于10MHz的带宽；当系统带宽为20MHz时，本发明实施例中的窄带宽可以是5MHz、10MHz、12MHz等小于20MHz的带宽。当系统带宽为1.4MHz时，本发明实施例中的窄带宽也可以是0.6MHz等小于1.4MHz的带宽。对于更大带宽的5G系统，窄带宽同样可以是小于5G系统中系统带宽的带宽。
S202，向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息。
可选地，基站可以通过高层信令，如无线资源控制协议(Radio Resource Control，RRC)，或者物理层信令，如DCI来指示终端切换到只接收窄带宽的模式。基站可以指示终端窄带宽接收模式开始的具体时刻，以及窄带宽在频带上的具体位置。这样，终端可以根据该切换消息切换到指定的窄带宽上接收信息。在窄带宽接收模式下，终端可以将自己的射频带宽调谐(retune)到只接收系统指示终端接收的频率域宽度即指定的窄带宽上。例如，如果基站指示终端的窄带宽是6个PRB(以15K Hz子载波间隔为例，就是1.4MHz)，那么终端就会将自己的射频单元调谐到系统指示的窄带宽所在的频带位置的6个PRB上。此时，终端只能接收到位于这6个PRB上的信号。由于接收射频带宽的减少，终端可以获得省电的效果。终端可以不用在较宽的系统带宽上去检测信号，而只需要在小于系统带宽的窄带宽上接收信号和检测信号，减少了终端的工作量，降低了终端的功耗，提升了终端接收信号的效率。
需要说明的，终端的功耗主要体现在两方面，第一方面，终端在整个系统带宽上检测信号；第二方面，终端对PDCCH的盲检，PDCCH的盲检包括检测不同的控制信道单元聚合等级如2，4，8以及不同DCI长度等，终端检测的DCI既包含只针对单个终端的DCI，需要在UE特定搜索空间检测，也包含针对多个终端的DCI，需要在公共搜索空间检测。由于检测的内容较多，也会导致终端的功耗较高，此时，还可参照图3所述的切换方法进行切换。
请参照图3，为本发明切换方法的第二实施例的流程示意图；在本实施例中，步骤S301-S302和图2中步骤S201-S202相同，此处不再赘述，除此之外，所述方法还包括以下步骤：
S303，在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息。
其中，所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
在窄带宽接收模式下，基站用来调度终端的PDCCH位于基站所指示的窄带宽上。为了减少终端接收这种PDCCH的复杂度，可以在位于窄带宽上的PDCCH携带针对单个不同终端的DCI，而不含有针对位于窄带宽上所有终端的DCI；或者说，位于窄带宽上的PDCCH只含有UE特定搜索空间，而不含有公共搜索空间。同时，针对单个不同终端的DCI，其控制信道单元聚合等级可以是固定的，例如可以在基站向终端配置窄带宽接收模式时就向终端指定其控制信道单元聚合等级是多少。
在本发明实施例中，由于PDCCH中只含有UE特定搜索空间和固定的控制信道单元聚合等级，因此，可以减少终端在接收位于窄带宽上的PDCCH时需要检测的信息量，从而可以进一步降低终端的功耗。
除了减少终端检测的带宽及检测的信息量之外，还可以配置窄带接收模式下终端在指定时间进入休眠状态或关闭接收机。
具体可参见图4，为本发明切换方法的第三实施例的流程示意图；在本实施例中，步骤S401-S403与图3中步骤S301-S303相同，此处不再赘述，所述方法还包括以下步骤：
S404，预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端，并指示所述终端在所述间隔周期内关闭接收机。
可选地，所述窄带信号可以包括但不限于：PDCCH和/或物理下行共享信 道(Physical Downlink Shared Channel，PDSCH)。基站可以预先配置终端在什么时间处于窄带宽接收模式，请参照图5，为采用图4所示切换方法在窄带宽上接收信号的示意图。在如图5中所示T1～T2时间即检测窄带信号的持续时长内处在窄带宽接收模式；基站也可以预先配置终端在什么时间不检测窄带PDCCH和/或可能存在的PDSCH(此时终端可以关闭接收机)，在如图5中所示T2～T3时间即检测窄带信号的间隔周期。当终端进入窄带宽接收模式后，就按照基站的配置定时(周期性)的检测窄带信号(窄带PDCCH和/或PDSCH)，其余时间可以关闭接收机以达到省电效果。
可选地，基站也可以向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息，指示所述终端在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。终端上可以配置定时器来进行计时。
如图5中所示T2～T3时刻，从T3时刻后，终端再开始检测窄带信号。基站将通过窄带PDCCH，如DCI,指示终端停止检测和再次开始检测的具体时刻。
或者，基站还可以向所述终端发送停止检测窄带信号的时刻信息，指示所述终端在停止检测窄带信号的时刻控制接收机进入休眠状态，在所述休眠状态下，若所述基站向所述终端发送唤醒消息，终端侦听到所述基站发送的唤醒消息，则开启接收机。
当UE控制接收机处于休眠状态下时，已经没有RRC连接以及用户的专有资源，因此此时终端可以监听呼叫信道与广播信道，当监听到基站发送的唤醒消息时，终端可以开启接收机。
在本实施例中，通过调度/预配置在窄带接收模式下的终端只在部分时间检测窄带信号，其它时间终端可以关闭接收机以进一步获得省电效果。
需要说明的，以上基站可以发送相关的时间信息给终端，由终端决定是否需要在不检测窄带信号的时间内关闭接收机，或者基站也可以在发送相关的时间信息给终端时，直接由基站指示终端在不检测窄带信号的时间内关闭接收机，本发明实施例不作任何限定。
请参照图6，为本发明切换方法的第四实施例的流程示意图；在本实施例 中，步骤S601-S602和图2中步骤S201-S202相同，所述切换方法还包括以下步骤：
S603，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽。
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
可选地，所述频带索引可以由基站配置并下发给终端，也可以在基站和终端上预存储，当基站发送频带索引给终端时，终端通过查表便可以确定将要切换到的带宽。
请参照图7，为本发明切换方法的第四实施例中频带索引的示意图；如图7所示，不同的频带索引指向位于不同频率域位置的各个可能的带宽。在通信系统中可以配置多个窄带宽的频带索引，位于不同的频率位置，如图中窄带宽1和2分别对应频带索引2，4所示。还可以配置多个系统带宽的频带索引，位于不同的频率位置。如图中系统带宽1和2分别对应频带索引1，3。
终端在接收到基站发送的频带索引和切换时延之后，可以根据频带索引和切换时延进行切换。此处的切换，可以是由窄带宽切换到系统带宽，也可以是窄带宽切换到窄带宽，可参见图8，为本发明采用图6所示切换方法中窄带宽的调度示意图，基站可以使用一个的切换时延将终端从窄带宽1调度到系统带宽1，也可以使用另一个不同的切换时延将窄带宽2调度到窄带宽3。
当然，对于如图2所述的由系统带宽切换到的窄带宽，也可以采用本发明切换方法的第四实施例中下发频率索引和切换时延的方法，本发明实施例不作任何限定。
请参照图9，为本发明切换方法的第五实施例的流程示意图；在本实施例中，步骤S901-S904与图4中步骤S401-S404相同，此处不再赘述，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
S905，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道。
其中，所述下行数据小于预设容量。
所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
当终端处在窄带宽接收模式时，基于信道容量的大小，基站也可以通过在窄带宽上的PDCCH为终端调度含有少量数据的PDSCH。在窄带宽上调度的PDSCH的频域资源位于窄带宽内，其所分配的资源和调制编码方式(Modulation and Coding Scheme，MCS)可以是固定的，或在有限的集合中选择。例如，如表1所示的窄带宽PDSCH的MCS和资源分配示意表
Figure PCTCN2017095246-appb-000001
其中，不同窄带宽中的MCS和所分配的资源，以及二者之间的映射关系可以是不一样的。例如对于窄带宽1而言，只有一种MCS和三种可能的资源分配集合；而对于窄带宽2而言，有两种MCS以及四种可能的资源分配集合。表1中所示的不同窄带宽，MCS和所分配资源的关系可以通过高层信令，如RRC信令预先配置。在窄带PDCCH上发送的DCI可以包含MCS和所资源对应的资源索引。对应窄带宽1所对应资源可以将其划分为两个以上的频段如set1和set2，分别对应资源索引1和资源索引2，占用不同的频率资源。
S906，在所述窄带宽的物理下行控制信道上，向所述终端发送针对上行传 输的确认反馈信号和混合自动重传进程标识。
可选地，除了传输少量的下行数据之外，在窄带宽接收模式下，还可以传输针对上行传输的确认反馈信号(ACK/NACK)和混合自动重传(Hybrid Auto Repeat Request，HARQ)进程标识(用于区分不同的上行传输进程)。
通过传输上述内容，可以丰富窄带宽接收模式的功能，在确保终端功耗较低的前提下，扩展窄带宽的作用。
需要说明的是，以上图2-图9所示的切换方法的实施例可以独立实施，也可以相互组合实施，本发明实施例不作任何限定。
请参照图10，为本发明切换方法的第六实施例的流程示意图；在本实施例中，所述切换方法包括：
S1001，终端接收基站配置窄带宽接收模式的切换消息。
所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
S1002，切换到所述切换消息指定的窄带宽上接收信息。
其中，所述窄带宽的宽度小于系统带宽的宽度。
图10为终端侧的实施例描述，其具体过程可参见图2所示基站侧的实施例描述，此处不再赘述。
请参照图11，为本发明切换方法的第七实施例的流程示意图；在本实施例中，与图10所示实施例相比，所述切换方法还包括：
S1103，接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息。
其中，所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
图11为终端侧的实施例描述，其具体过程可参见图3所示基站侧的实施例描述，此处不再赘述。
请参照图12，为本发明切换方法的第八实施例的流程示意图，在本实施例中，与图11所示实施例相比，所述切换方法还包括：
S1204，接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄 带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机。
可选地，在本实施例中，还可以包括：
接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机；
或者，接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。
在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，所述切换方法还包括：
接收所述基站发送的频带索引和切换时延，根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
在所述窄带宽的物理下行控制信道上，接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
可选地，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
在所述窄带宽的物理下行控制信道上，接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
图12为终端侧的实施例描述，其具体过程可参见图4-图9所示基站侧的实施例描述，此处不再赘述。
请参照图13，为本发明基站的第一实施例的组成示意图；在本实施例中，所述基站包括：
配置单元100，用于配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
发送单元200，用于向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
可选地，所述发送单元200还用于在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
可选地，所述配置单元100还用于预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，所述发送单元200还用于将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
或者，所述发送单元200还用于向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
可选地，所述发送单元200还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
可选地，所述发送单元200还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
可选地，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
可选地，所述发送单元200还用于当所述终端处于所述窄带宽接收模式时， 在所述窄带宽的物理下行控制信道上，向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
请参照图14，为本发明基站的第二实施例的组成示意图；在本实施例中，所述基站包括：
处理器110、存储器120、收发器130和总线140，所述处理器110、存储器120和收发器130通过总线140连接，其中，所述收发器130用于收发信号，与终端进行通信，所述存储器120用于存储一组程序代码，所述处理器110用于调用所述存储器120中存储的程序代码，执行以下操作：
配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
通过所述收发器130向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
可选地，所述处理器110还用于通过所述收发器130在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
可选地，所述处理器110还用于预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，通过所述收发器130将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
或者，通过所述收发器130向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
可选地，所述处理器110还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的 带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
可选地，所述处理器110还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
可选地，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
可选地，所述处理器110还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述收发器130向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
请参照图15，为本发明终端的第一实施例的组成示意图，在本实施例中，所述终端包括：
接收单元300，用于接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换单元400，切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
可选地，所述接收单元300还用于接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
可选地，所述接收单元300还用于接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机；
或者，接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。
可选地，所述接收单元300还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，接收所述基站发送的频带索引和切换时延，所述切换单元400还用于根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
可选地，当所述终端处于所述窄带宽接收模式时，所述接收单元300还用于在所述窄带宽的物理下行控制信道上，接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
可选地，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
可选地，当所述终端处于所述窄带宽接收模式时，所述接收单元300还用于在所述窄带宽的物理下行控制信道上，接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
请参照图16，为本发明终端的第二实施例的组成示意图；在本实施例中，所述终端包括：
处理器210、存储器220、发射机230、接收机240和总线250，所述处理器210、存储器220、发射机230和接收机240通过总线250连接，其中，所述发射机230用于发射信号，所述接收机240用于接收信号，所述发射机230和所述接收机240分别独立设置或集成设置，所述存储器220用于存储一组程序代码，所述处理器210用于调用所述存储器220中存储的程序代码，执行以下操作：
通过所述接收机240接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
可选地，所述处理器210还用于通过所述接收机240接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
可选地，所述处理器210还用于通过所述接收机240接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭所述接收机240；
或者，通过所述接收机240接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭所述接收机240并在再次开始检测信号的时刻开启所述接收机240。
可选地，所述处理器210还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，通过所述接收机240接收所述基站发送的频带索引和切换时延，根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
可选地，所述处理器210还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述接收机240接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
可选地，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
可选地，所述处理器210还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述接收机240接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
当终端处于窄带宽的接收模式下，如果系统的PDCCH只包含UE特定搜索空间而不包含公共搜索空间，这样虽然能起到省电的效果，但是在某些情况下，基站还是需要使公共搜索空间向UE广播一些控制信令。此时可以采用如 图17-图25所述的方法来进行窄带切换和检测。
请参照图17，为本发明切换方法的第九实施例的流程示意图；在本实施例中，所述切换方法包括以下步骤：
S1701，基站配置窄带宽接收模式的切换消息。
其中，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
可选地，进入所述窄带宽接收模式的时间可以包含进入所述窄带宽接收模式的起始时间，终端接收到该切换消息后，在指定的起始时间进入窄带宽接收模式，直至接收到基站发送的停止窄带宽接收模式的消息时切换到系统带宽；或者也可以在接收到基站发送的切换到其他窄带宽或系统带宽的消息时，从当前窄带宽切换到其他窄带宽或系统带宽。
进入所述窄带宽接收模式的时间除了包含进入所述窄带宽接收模式的时间之外，或者还可以包含进入所述窄带宽接收模式的终止时间，终端可以在指定的起始时间进入窄带宽接收模式，在指定的终止时间切换回系统带宽接收信息。
需要说明的是，对于支持机器通信(Machine Type Communications，MTC)的终端而言，可以在1.4MHz即6个PRB带宽上去解调下行信号。对于此种类型终端，由于下行带宽变小，终端的功耗得以节约。但是由于此类终端只能工作在较窄的带宽上，如6个PRB上，终端的功能会受比较大的限制。本发明实施例中的窄带宽的宽度小于系统带宽的宽度，即本发明实施例中窄带宽是指小于系统带宽的频率域上的宽度。与现有4G系统中的1.4MHz的带宽是不同的概念。例如，现有4G系统中比较典型的系统带宽为10MHz和20MHz，当系统带宽为10MHz时，本发明实施例中的窄带宽可以是2MHz、5MHz等小于10MHz的带宽；当系统带宽为20MHz时，本发明实施例中的窄带宽可以是5MHz、10MHz、12MHz等小于20MHz的带宽。当系统带宽为1.4MHz时，本发明实施例中的窄带宽也可以是0.6MHz等小于1.4MHz的带宽。对于更大带宽的5G系统，窄带宽同样可以是小于5G系统中系统带宽的带宽。
S1702，向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息。
可选地，基站可以通过高层信令，如无线资源控制协议(Radio Resource Control，RRC)，或者物理层信令，如DCI来指示终端切换到只接收窄带宽的模式。基站可以指示终端窄带宽接收模式开始的具体时刻，以及窄带宽在频带上的具体位置。这样，终端可以根据该切换消息切换到指定的窄带宽上接收信息。在窄带宽接收模式下，终端可以将自己的射频带宽调谐(retune)到只接收系统指示终端接收的频率域宽度即指定的窄带宽上。例如，如果基站指示终端的窄带宽是6个PRB(以15K Hz子载波间隔为例，就是1.4MHz)，那么终端就会将自己的射频单元调谐到系统指示的窄带宽所在的频带位置的6个PRB上。此时，终端只能接收到位于这6个PRB上的信号。由于接收射频带宽的减少，终端可以获得省电的效果。终端可以不用在较宽的系统带宽上去检测信号，而只需要在小于系统带宽的窄带宽上接收信号和检测信号，减少了终端的工作量，降低了终端的功耗，提升了终端接收信号的效率。
需要说明的是，所述窄带宽可以包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。这样，为了实现在公共搜索空间向UE广播一些控制信令的目的，可以指示终端从第一窄带宽切换到第二窄带宽。此处为了描述方便仅使用了第一窄带宽和第二窄带宽，当然还可以存在第三窄带宽或第四窄带宽等，其中包含终端特定搜索空间的窄带宽和包含公共搜索空间的窄带宽。
当然，除了包含公共搜索空间的窄带宽之外，基站也可以指示终端切换到包含公共搜索空间的系统带宽进行检测。
下面详细介绍三种切换方式：
请参照图18，为本发明切换方法的第十实施例的流程示意图；在本实施例中，步骤S1801-S1802与S1701-S1702相同，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括以下步骤：
S1803，所述基站配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数。
所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长。
例如，基站可以为终端配置不同的窄带宽，有的窄带宽包含终端特定搜索空间，而有的窄带宽包含公共搜索空间。基站可以直接指示终端，在哪个时间段去检测含有终端特定搜索空间的窄带宽，在哪个时间段去检测含公共搜索空间的窄带宽。除了指示具体的时间段之外，也可以为不同的窄带宽配置不同的检测的周期、起始时刻和单次检测时长，如第一窄带宽的检测的周期为L1，起始时刻为T1，单次检测时长为(T2-T1)，则终端将会在每个周期内固定的时间段内切换到第一窄带宽进行检测。
S1804，将所述检测参数发送给所述终端，指示所述终端根据所述检测参数进行切换和检测。
通过检测参数的具体配置，便可以指示终端在不同窄带宽上进行切换及检测。
请参照图19，为本发明采用图18所示切换方法在不同窄带宽上切换的示意图。
如图19所示，其中包含第一窄带宽(窄带宽1，对应窄带PDCCH1)和第二窄带宽(窄带宽2，对应窄带PDCCH2)，这两个窄带宽的频域位置可以是部分重叠或完全不重叠的(图19中为完全不重叠的情况)。基站可以配置终端在不同的时间段检测不同的窄带宽。如图19所示，终端在T1～T2,T5～T6时间内检测窄带宽1；终端在T3～T4,T7～T8时间内检测窄带宽2。T2～T3,T4～T5,T6～T7的时间是终端在不同窄带宽间调谐(retune)的时间。系统可以用上述时间图案(time pattern)的方式指示终端何时去检测哪一个窄带宽,还可以具体指出哪些符号(symbol)上去检测哪一个窄带宽，哪些符号上是用来调谐的。
或者还可以通过指示检测周期、起始时刻和单次检测时长来实现周期性检测。如基站可以为不同的窄带宽配置不同的检测周期、起始时刻和单次检测时长。以图19为例，窄带宽1的周期是L1,起始时刻是T1,(在一种可能的实现方式中还可以配置检测的终止时刻如T2),每次检测的持续时长是(T2-T1)；带宽2的周期是L2,起始时刻是T3,,每次检测的持续时间是(T4-T3)。这样，当进入下一个周期时，终端便会根据这些检测参数在T5～T6再次切换到窄带宽1上进行检测，以及在T7～T8再次切换到窄带宽2上进行检测。
对于已经进入连接态的终端来说，基站通常不会频繁的通过公共搜索空间向终端发送控制信令，因此除了图18-图19所述的切换方法之外，还可以通过图20所述的方法来进行切换。
请参照图20，为本发明切换方法的第十一实施例的流程示意图；在本实施例中，步骤S2001-S2002与S1701-S1702相同，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括以下步骤：
S2003，在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
可选地，所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
这样，基站便可以通过第一窄带宽上传送的PDCCH中终端特定搜索空间中包含的DCI，去触发终端检测另一个窄带宽如第二窄带宽(或系统带宽)上包含的公共搜索空间。在DCI中可以指示终端，第二窄带宽(或PDCCH)所在的时频位置，终端检测持续时长，以及检测完成后终端需要继续监听(monitor)的窄带宽。此处，基站可以指示终端回到原来的第一窄带宽，或是为终端分配一个新的窄带宽去监听，如果是分配一个新的窄带宽去监听，则需要向终端提供新的窄带宽的信息,如该窄带宽的位置，给终端的调谐时间等。
通过这种终端特定搜索空间的DCI触发终端去监听公共搜索空间的方法，由于是根据需要才去触发的，因此节约功耗的效果较佳。
当采用DCI触发的方式来实现窄带宽切换时，如果终端特定搜索空间的信道质量变差，可能存在DCI触发信令丢失的情况，因此还可以采用图21所述的切换方法来进行切换。
请参照图21，为本发明切换方法的第十二实施例的流程示意图；在本实施例中，步骤S2101-S2102与S1701-S1702相同，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括以下步骤：
S2103，所述基站配置检测所述第二窄带宽的周期。
S2104，将所述周期的信息发送给所述终端，指示所述终端根据所述周期 检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
S2105，在所述周期内，若需要在所述第一窄带宽和所述第二窄带宽进行切换，则在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
可选地，所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
基站可以为终端配置一个包含公共搜索空间的第二窄带宽，此处的第二窄带宽也可以由系统带宽替代。基站可以为第二窄带宽配置一个比较长的检测周期，这样终端将会在间隔比较长的时间之后才去检测一次含有公共搜索空间的第二窄带宽。同时，在这个检测周期内，当存在切换需要时，基站也可以在第一窄带宽的终端特定搜索空间上的DCI去触发终端检测含公共搜索空间的第二窄带宽。
此处触发的次数本发明不作任何限定，且当检测周期到达时，终端可以根据周期再次检测第二窄带宽的公共搜索空间，或者，所述基站还可以配置用于指示终端暂停根据所述周期检测所述第二窄带宽的预设时长；将所述预设时长发送给所述终端，指示所述终端在所述预设时长内暂停根据所述周期检测所述第二窄带宽；若在所述预设时长内需要在所述第一窄带宽和所述第二窄带宽进行切换，则再次在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。这样，可以减少过多的检测，降低功耗。
请参照图22，为本发明切换方法的第十三实施例的流程示意图；在本实施例中，所述切换方法包括以下步骤：
S2201，终端接收基站配置窄带宽接收模式的切换消息。
所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
S2202，切换到所述切换消息指定的窄带宽上接收信息。
其中，所述窄带宽的宽度小于系统带宽的宽度。所述窄带宽包括第一窄带 宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
图22为终端侧的实施例描述，其具体过程可参见图17所示基站侧的实施例描述，此处不再赘述。
请参照图23，为本发明切换方法的第十四实施例的流程示意图；在本实施例中，与图22所示实施例相比，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
S2303，所述终端接收所述基站发送的检测参数.
所述检测参数为所述基站配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长.
S2304，所述终端根据所述检测参数进行切换和检测。
图23为终端侧的实施例描述，其具体过程可参见图18-图19所示基站侧的实施例描述，此处不再赘述。
请参照图24，为本发明切换方法的第十五实施例的流程示意图；在本实施例中，与图22所示实施例相比，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
S2403，所述终端接收所述基站在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息。
S2404，根据所述下行控制信息检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
图24为终端侧的实施例描述，其具体过程可参见图20所示基站侧的实施例描述，此处不再赘述。
请参照图25，为本发明切换方法的第十六实施例的流程示意图；在本实 施例中，与图22所示实施例相比，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
S2503，所述终端接收所述基站配置的检测所述第二窄带宽的周期的信息。
S2504，根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
S2505，在所述周期内，若接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
可选地，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述切换方法还包括：
所述终端接收所述基站配置的用于指示所述终端暂停根据所述周期检测所述第二窄带宽的预设时长；
在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
若在所述预设时长内再次接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
图25为终端侧的实施例描述，其具体过程可参见图21所示基站侧的实施例描述，此处不再赘述。
请参照图26，为本发明基站的第三实施例的组成示意图；在本实施例中，所述基站包括：
配置单元500，用于配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
发送单元600，用于向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度，所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理 下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
可选地，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述配置单元500还用于配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长；
所述发送单元600还用于将所述检测参数发送给所述终端，指示所述终端根据所述检测参数进行切换和检测。
可选地，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述发送单元600还用于在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
可选地，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述配置单元500还用于配置检测所述第二窄带宽的周期；
所述发送单元600还用于将所述周期的信息发送给所述终端，指示所述终端根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；
在所述周期内，若需要在所述第一窄带宽和所述第二窄带宽进行切换，则所述发送单元600还用于在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
可选地，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述配置单元500还用于配置用于指示终端暂停根据所述周期检测所述第二窄带宽的预设时长；
所述发送单元600还用于将所述预设时长发送给所述终端，指示所述终端在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
若在所述预设时长内需要在所述第一窄带宽和所述第二窄带宽进行切换， 则所述发送单元600还用于再次在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
请参照图27，为本发明基站的第四实施例的组成示意图；在本实施例中，所述基站包括：
处理器310、存储器320、收发器330和总线340，所述处理器310、存储器320和收发器330通过总线340连接，其中，所述收发器330用于收发信号，与终端进行通信，所述存储器320用于存储一组程序代码，所述处理器310用于调用所述存储器320中存储的程序代码，执行如本发明图17-图21任意实施例中的步骤。
请参照图28，为本发明终端的第三实施例的组成示意图；在本实施例中，所述终端包括：
接收单元700，用于接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
切换单元800，用于切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度,所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
可选地，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述接收单元700还用于接收所述基站发送的检测参数，所述检测参数为所述基站配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长；
所述切换单元800还用于根据所述检测参数进行切换和检测。
可选地，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述接收单元700还用于接收所述基站在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
所述切换单元800还用于根据所述下行控制信息检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
可选地，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述接收单元700还用于接收所述基站配置的检测所述第二窄带宽的周期的信息；
所述切换单元800还用于根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；
在所述周期内，若所述接收单元700接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述切换单元800还用于检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
可选地，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述接收单元700还用于接收所述基站配置的用于指示所述终端暂停根据所述周期检测所述第二窄带宽的预设时长；
所述切换单元800还用于在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
若所述接收单元700在所述预设时长内再次接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述切换单元800还用于检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
请参照图29，为本发明终端的第四实施例的组成示意图；在本实施例中，所述终端包括：
处理器410、存储器420、发射机430、接收机440和总线450，所述处理器410、存储器420、发射机430和接收机440通过总线450连接，其中，所述发射机430用于发射信号，所述接收机440用于接收信号，所述发射机430和所述接收机440分别独立设置或集成设置，所述存储器420用于存储一组程序代码，所述处理器410用于调用所述存储器420中存储的程序代码，执行如 图22-图25任意实施例中的步骤。
本实施例中介绍的基站可以用以实施本发明结合图2-图6、图17-图21介绍的方法实施例中的部分或全部流程，以及执行本发明结合图13和图26介绍的装置实施例中的部分或全部功能，本实施例中介绍的终端可以用以实施本发明结合图7-图9、图22-图25介绍的方法实施例中的部分或全部流程，以及执行本发明结合图15和图28介绍的装置实施例中的部分或全部功能，在此不再赘述。
在一个或多个实例中，所描述的功能可以硬件、软件、固件或其任何组合来实施。如果以软件实施，则功能可作为一个或多个指令或代码而存储于计算机可读媒体上或经由计算机可读媒体而发送，且通过基于硬件的处理单元执行。计算机可读媒体可包含计算机可读存储媒体(其对应于例如数据存储媒体等有形媒体)或通信媒体，通信媒体包含(例如)根据通信协议促进计算机程序从一处传送到另一处的任何媒体。以此方式，计算机可读媒体大体上可对应于(1)非瞬时的有形计算机可读存储媒体，或(2)例如信号或载波等通信媒体。数据存储媒体可为可由一个或多个计算机或一个或多个处理器存取以检索指令、代码及/或数据结构以用于实施本发明中所描述的技术的任何可用媒体。计算机程序产品可包含计算机可读媒体。
通过实例而非限制，某些计算机可读存储媒体可包括RAM、ROM、EEPROM、CD-ROM或其它光盘存储器、磁盘存储器或其它磁性存储装置、快闪存储器，或可用以存储呈指令或数据结构的形式的所要程序代码且可由计算机存取的任何其它媒体。而且，任何连接可适当地称为计算机可读媒体。举例来说，如果使用同轴电缆、光缆、双绞线、数字用户线(DSL)或无线技术(例如，红外线、无线电及微波)而从网站、服务器或其它远程源发送指令，则同轴电缆、光缆、双绞线、DSL或无线技术(例如，红外线、无线电及微波)包含于媒体的定义中。然而，应理解，计算机可读存储媒体及数据存储媒体不包含连接、载波、信号或其它瞬时媒体，而是有关非瞬时有形存储媒体。如本文中所使用，磁盘及光盘包含压缩光盘(CD)、激光光盘、光学光盘、数字影音光盘(DVD)、软性磁盘及蓝光光盘，其中磁盘通常以磁性方式复制数据，而光盘通过激光以光学方式复制数据。以上各物的组合还应包含于计算机可读媒体的范 围内。
可由例如一个或多个数字信号处理器(DSP)、通用微处理器、专用集成电路(ASIC)、现场可编程逻辑阵列(FPGA)或其它等效集成或离散逻辑电路等一个或多个处理器来执行指令。因此，如本文中所使用的术语“处理器”可指代前述结构或适于实施本文中所描述的技术的任何其它结构中的任一者。另外，在一些方面中，可将本文中所描述的功能性提供于经配置以用于编码及解码的专用硬件及/或软件模块内，或并入于组合式编解码器中。而且，所述技术可完全实施于一个或多个电路或逻辑元件中。
本发明的技术可以广泛地由多种装置或设备来实施，所述装置或设备包含无线手持机、集成电路(IC)或IC集合(例如，芯片组)。在本发明中描述各种组件、模块或单元以强调经配置以执行所揭示技术的装置的功能方面，但未必要求通过不同硬件单元来实现。确切地说，如上文所描述，各种单元可组合于编解码器硬件单元中，或通过交互操作性硬件单元(包含如上文所描述的一个或多个处理器)的集合结合合适软件及/或固件来提供。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本发明的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
在本发明的各种实施例中，应理解，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，而不应对本发明实施例的实施过程构成任何限定。
另外，本文中术语“系统”和“网络”在本文中常可互换使用。应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请所提供的实施例中，应理解，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
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、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。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发明的范围。
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。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (64)

  1. 一种切换方法，其特征在于，包括：
    基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
  2. 如权利要求1所述的切换方法，其特征在于，所述切换方法还包括：
    在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
    所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
  3. 如权利要求1或2所述的切换方法，其特征在于，所述切换方法还包括：
    预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
    或者，向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
  4. 如权利要求3所述的切换方法，其特征在于，在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，所述切换方法还包括：
    向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
    其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带 宽上开始接收信号的时刻之间的时间偏移量。
  5. 如权利要求3所述的切换方法，其特征在于，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
    在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
  6. 如权利要求5所述的切换方法，其特征在于，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
  7. 如权利要求3所述的切换方法，其特征在于，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
    在所述窄带宽的物理下行控制信道上，向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
  8. 一种切换方法，其特征在于，包括：
    终端接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
  9. 如权利要求8所述的切换方法，其特征在于，所述切换方法还包括：
    接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
    所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
  10. 如权利要求8或9所述的切换方法，其特征在于，所述切换方法还包括：
    接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机；
    或者，接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。
  11. 如权利要求10所述的切换方法，其特征在于，在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，所述切换方法还包括：
    接收所述基站发送的频带索引和切换时延，根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
    其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
  12. 如权利要求10所述的切换方法，其特征在于，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
    在所述窄带宽的物理下行控制信道上，接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
  13. 如权利要求12所述的切换方法，其特征在于，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
  14. 如权利要求10所述的切换方法，其特征在于，当所述终端处于所述窄带宽接收模式时，所述切换方法还包括：
    在所述窄带宽的物理下行控制信道上，接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
  15. 一种基站，其特征在于，包括：
    配置单元，用于配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    发送单元，用于向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
  16. 如权利要求15所述的基站，其特征在于，所述发送单元还用于在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
    所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
  17. 如权利要求15或16所述的基站，其特征在于，所述配置单元还用于预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，所述发送单元还用于将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
    或者，所述发送单元还用于向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
  18. 如权利要求17所述的基站，其特征在于，所述发送单元还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
    其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
  19. 如权利要求17所述的基站，其特征在于，所述发送单元还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
  20. 如权利要求19所述的基站，其特征在于，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
  21. 如权利要求17所述的基站，其特征在于，所述发送单元还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
  22. 一种基站，其特征在于，包括：
    处理器、存储器、收发器和总线，所述处理器、存储器和收发器通过总线连接，其中，所述收发器用于收发信号，与终端进行通信，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行以下操作：
    配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    通过所述收发器向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
  23. 如权利要求22所述的基站，其特征在于，所述处理器还用于通过所述收发器在位于所述窄带宽上的物理下行控制信道中发送针对所述终端的下 行控制信息；
    所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
  24. 如权利要求22或23所述的基站，其特征在于，所述处理器还用于预配置所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，通过所述收发器将所述检测窄带信号的持续时长以及检测窄带信号的间隔周期发送给所述终端；
    或者，通过所述收发器向所述终端发送停止检测窄带信号和再次开始检测检测信号的时刻信息。
  25. 如权利要求24所述的基站，其特征在于，所述处理器还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，向所述终端发送频带索引和切换时延，指示所述终端切换到其他窄带宽或其他系统带宽；
    其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
  26. 如权利要求24所述的基站，其特征在于，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，为所述终端调度包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
  27. 如权利要求26所述的基站，其特征在于，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上发送的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
  28. 如权利要求24所述的基站，其特征在于，所述处理器还用于当所述 终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述收发器向所述终端发送针对上行传输的确认反馈信号和混合自动重传进程标识。
  29. 一种终端，其特征在于，包括：
    接收单元，用于接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    切换单元，切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
  30. 如权利要求29所述的终端，其特征在于，所述接收单元还用于接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
    所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
  31. 如权利要求29或30所述的终端，其特征在于，所述接收单元还用于接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭接收机；
    或者，接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭接收机并在再次开始检测信号的时刻开启接收机。
  32. 如权利要求31所述的终端，其特征在于，所述接收单元还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，接收所述基站发送的频带索引和切换时延，所述切换单元还用于根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
    其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带 宽上开始接收信号的时刻之间的时间偏移量。
  33. 如权利要求31所述的终端，其特征在于，当所述终端处于所述窄带宽接收模式时，所述接收单元还用于在所述窄带宽的物理下行控制信道上，接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
  34. 如权利要求33所述的终端，其特征在于，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以及所述下行数据的调制编码方式。
  35. 如权利要求31所述的终端，其特征在于，当所述终端处于所述窄带宽接收模式时，所述接收单元还用于在所述窄带宽的物理下行控制信道上，接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
  36. 一种终端，其特征在于，包括：
    处理器、存储器、发射机、接收机和总线，所述处理器、存储器、发射机和接收机通过总线连接，其中，所述发射机用于发射信号，所述接收机用于接收信号，所述发射机和所述接收机分别独立设置或集成设置，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行以下操作：
    通过所述接收机接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度。
  37. 如权利要求36所述的终端，其特征在于，所述处理器还用于通过所 述接收机接收位于所述窄带宽上的物理下行控制信道中针对所述终端的下行控制信息；
    所述下行控制信息位于与所述终端对应的终端特定搜索空间且使用与所述终端对应的控制信道单元聚合等级。
  38. 如权利要求36或37所述的终端，其特征在于，所述处理器还用于通过所述接收机接收所述基站预配置的所述终端在所述窄带宽接收模式下检测窄带信号的持续时长以及检测窄带信号的间隔周期，在所述间隔周期内关闭所述接收机；
    或者，通过所述接收机接收所述基站发送的停止检测窄带信号和再次开始检测检测信号的时刻信息，在停止检测窄带信号的时刻关闭所述接收机并在再次开始检测信号的时刻开启所述接收机。
  39. 如权利要求38所述的终端，其特征在于，所述处理器还用于在所述终端切换到所述切换消息指定的窄带宽上接收信息之后，通过所述接收机接收所述基站发送的频带索引和切换时延，根据所述频带索引和切换时延切换到其他窄带宽或其他系统带宽；
    其中，所述频带索引用于指示位于不同频域位置上所述终端将要切换到的带宽，所述切换时延用于指示从当前时刻到所述终端在所述频带索引指示的带宽上开始接收信号的时刻之间的时间偏移量。
  40. 如权利要求38所述的终端，其特征在于，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述接收机接收所述基站为所述终端调度的包含下行数据的物理下行共享信道，其中，所述下行数据小于预设容量。
  41. 如权利要求40所述的终端，其特征在于，所述物理下行共享信道的频域资源位于所述窄带宽内，在所述窄带宽的物理下行控制信道上接收的下行控制信息中包含为所述物理下行共享信道分配的频域资源对应的资源索引以 及所述下行数据的调制编码方式。
  42. 如权利要求38所述的终端，其特征在于，所述处理器还用于当所述终端处于所述窄带宽接收模式时，在所述窄带宽的物理下行控制信道上，通过所述接收机接收所述基站发送的针对上行传输的确认反馈信号和混合自动重传进程标识。
  43. 一种切换方法，其特征在于，包括：
    基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度，所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
  44. 如权利要求43所述的切换方法，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
    所述基站配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长；
    将所述检测参数发送给所述终端，指示所述终端根据所述检测参数进行切换和检测。
  45. 如权利要求43所述的切换方法，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
    在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终 端检测持续时长以及检测完成后终端需要监听的窄带宽。
  46. 如权利要求43所述的切换方法，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
    所述基站配置检测所述第二窄带宽的周期；
    将所述周期的信息发送给所述终端，指示所述终端根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；
    在所述周期内，若需要在所述第一窄带宽和所述第二窄带宽进行切换，则在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  47. 如权利要求46所述的切换方法，其特征在于，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述切换方法还包括：
    所述基站配置用于指示终端暂停根据所述周期检测所述第二窄带宽的预设时长；
    将所述预设时长发送给所述终端，指示所述终端在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
    若在所述预设时长内需要在所述第一窄带宽和所述第二窄带宽进行切换，则再次在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
  48. 一种切换方法，其特征在于，包括：
    终端接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度 小于系统带宽的宽度,所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
  49. 如权利要求48所述的切换方法，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
    所述终端接收所述基站发送的检测参数，所述检测参数为所述基站配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长；所述终端根据所述检测参数进行切换和检测。
  50. 如权利要求48所述的切换方法，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
    所述终端接收所述基站在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
    根据所述下行控制信息检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  51. 如权利要求48所述的切换方法，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述切换方法还包括：
    所述终端接收所述基站配置的检测所述第二窄带宽的周期的信息；
    根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；
    在所述周期内，若接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  52. 如权利要求51所述的切换方法，其特征在于，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述切换方法还包括：
    所述终端接收所述基站配置的用于指示所述终端暂停根据所述周期检测所述第二窄带宽的预设时长；
    在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
    若在所述预设时长内再次接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
  53. 一种基站，其特征在于，包括：
    配置单元，用于配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    发送单元，用于向所述终端发送所述切换消息，指示所述终端切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度，所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
  54. 如权利要求53所述的基站，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述配置单元还用于配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长；
    所述发送单元还用于将所述检测参数发送给所述终端，指示所述终端根据所述检测参数进行切换和检测。
  55. 如权利要求53所述的基站，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述发送单元还用于在位于所述第一窄带宽上 的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  56. 如权利要求53所述的基站，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述配置单元还用于配置检测所述第二窄带宽的周期；
    所述发送单元还用于将所述周期的信息发送给所述终端，指示所述终端根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；
    在所述周期内，若需要在所述第一窄带宽和所述第二窄带宽进行切换，则所述发送单元还用于在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  57. 如权利要求56所述的基站，其特征在于，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述配置单元还用于配置用于指示终端暂停根据所述周期检测所述第二窄带宽的预设时长；
    所述发送单元还用于将所述预设时长发送给所述终端，指示所述终端在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
    若在所述预设时长内需要在所述第一窄带宽和所述第二窄带宽进行切换，则所述发送单元还用于再次在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息，触发所述终端检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
  58. 一种基站，其特征在于，包括：
    处理器、存储器、收发器和总线，所述处理器、存储器和收发器通过总线连接，其中，所述收发器用于收发信号，与终端进行通信，所述存储器用于存 储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行如权利要求43-47任一项所述的步骤。
  59. 一种终端，其特征在于，包括：
    接收单元，用于接收基站配置窄带宽接收模式的切换消息，所述切换消息中包含指示终端进入所述窄带宽接收模式的时间以及进入所述窄带宽接收模式时窄带宽在频带上的位置；
    切换单元，用于切换到所述切换消息指定的窄带宽上接收信息，其中，所述窄带宽的宽度小于系统带宽的宽度,所述窄带宽包括第一窄带宽或第二窄带宽，所述第一窄带宽的物理下行控制信道中包含终端特定搜索空间，所述第二窄带宽的物理下行控制信道中包含公共搜索空间。
  60. 如权利要求59所述的终端，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述接收单元还用于接收所述基站发送的检测参数，所述检测参数为所述基站配置所述终端分别检测所述第一窄带宽和所述第二窄带宽的检测参数；所述检测参数包括检测的时间段，或者包括检测的周期、起始时刻和单次检测时长；
    所述切换单元还用于根据所述检测参数进行切换和检测。
  61. 如权利要求59所述的终端，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述接收单元还用于接收所述基站在位于所述第一窄带宽上的物理下行控制信道中发送针对所述终端的下行控制信息；
    所述切换单元还用于根据所述下行控制信息检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  62. 如权利要求59所述的终端，其特征在于，当需要在所述第一窄带宽和所述第二窄带宽进行切换时，所述接收单元还用于接收所述基站配置的检测所述第二窄带宽的周期的信息；
    所述切换单元还用于根据所述周期检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；
    在所述周期内，若所述接收单元接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述切换单元还用于检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间；所述下行控制信息中包括所述第二窄带宽所在的时频位置、终端检测持续时长以及检测完成后终端需要监听的窄带宽。
  63. 如权利要求62所述的终端，其特征在于，若在所述周期内，所述终端在所述第一窄带宽和所述第二窄带宽进行过切换，所述接收单元还用于接收所述基站配置的用于指示所述终端暂停根据所述周期检测所述第二窄带宽的预设时长；
    所述切换单元还用于在所述预设时长内暂停根据所述周期检测所述第二窄带宽；
    若所述接收单元在所述预设时长内再次接收到所述基站在位于所述第一窄带宽上的物理下行控制信道中发送的针对所述终端的下行控制信息，则所述切换单元还用于检测所述第二窄带宽的物理下行控制信道中包含的公共搜索空间。
  64. 一种终端，其特征在于，包括：
    处理器、存储器、发射机、接收机和总线，所述处理器、存储器、发射机和接收机通过总线连接，其中，所述发射机用于发射信号，所述接收机用于接收信号，所述发射机和所述接收机分别独立设置或集成设置，所述存储器用于存储一组程序代码，所述处理器用于调用所述存储器中存储的程序代码，执行如权利要求48-52任一项所述的步骤。
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