WO2018010174A1

WO2018010174A1 - Communication method and device

Info

Publication number: WO2018010174A1
Application number: PCT/CN2016/090203
Authority: WO
Inventors: 温容慧; 张武荣; 于光炜
Original assignee: 华为技术有限公司
Priority date: 2016-07-15
Filing date: 2016-07-15
Publication date: 2018-01-18

Abstract

A communication method and device, for use in saving investment costs of system resources while ensuring reliable and quick transmission of key information, such as downlink synchronization information and broadcast information, in application scenarios of massive terminal connections. The method comprises: a base station sets correspondences between different terminal groups and different sets of time-frequency resource locations, the time-frequency resource locations being positioned on a license-free spectrum; the base station sends information comprising the correspondences to each terminal on a licensed spectrum, the correspondences being used for instructing terminals positioned in the same terminal group to send data to the base station at a corresponding set of time-frequency resource locations; the base station receives the data sent by each terminal on the license-free spectrum.

Description

Communication method and device

Technical field

The present application relates to the field of communications technologies, and in particular, to a communication method and device.

Background technique

Machine to machine (English: Machine to machine, abbreviation: M2M) is the abbreviation of the transmission of information and data between machines and machines through wireless networks, and is an important direction for the next step of mobile communication. It is widely used in many fields, including intelligent transportation, building control systems, home intelligent control systems, video surveillance systems, industrial monitoring and so on.

In an M2M system, a physical channel between a device and a device includes a synchronization channel, a broadcast channel, a control channel, a data channel, and the like. For example, the terminal determines the time and frequency of the signal transmitted by the base station through the synchronization channel to calibrate the local time-frequency offset.

The main feature of the M2M system is that the number of connections is huge, and the number of terminals connected to each node (ie, the base station) can reach tens of thousands or even hundreds of thousands. The M2M system is applicable to the above scenarios, such as terminal data collection and service alarms. Therefore, M2M systems require a large amount of spectrum resources.

In the scenario of such a massive terminal connection, if the licensed spectrum is used, the operator's spectrum resources are very expensive, resulting in an increase in the investment of the M2M system. If an unlicensed spectrum is used, there are certain requirements for the duty cycle of the unlicensed spectrum, such as a duty cycle of 2% or even 0.1%. This means that the regulation of the duty cycle limits the transmission duration of the base station. Even if the base station only transmits synchronization, broadcast, feedback and other information on the downlink channel, the duty cycle greatly limits the synchronization and read system information of the M2M system. time. In the M2M system, the terminal cost is low and most of them require a power-saving function. When the sleep wakes up, the synchronization must be re-synchronized, and the synchronization time is too long, which is not conducive to the terminal power saving.

Therefore, for the application scenario of massive terminal giant connection, how to ensure reliable and fast transmission of key information such as downlink synchronization and broadcasting, and saving the investment cost of system resources is an urgent problem to be solved.

Summary of the invention

The present invention provides a communication method and device, which can solve the problem of how to ensure reliable and fast transmission of key information such as downlink synchronization and broadcast under the application scenario of massive connection of a large number of terminals, and save the input overhead of system resources.

In one aspect, a communication method is provided, the method includes: a base station setting a correspondence between different terminal groups and a set of different time-frequency resource locations, where the time-frequency resource location is on an unlicensed spectrum; and the base station is in a licensed spectrum The information about the corresponding relationship is sent to each terminal, where the correspondence is used to indicate that the terminal located in the same terminal group sends data to the base station in a corresponding set of time-frequency resource locations; The data transmitted by the respective terminals is received on the unlicensed spectrum. In this way, the base station occupies the licensed spectrum to indicate that the terminal occupies the corresponding time-frequency resource to transmit the uplink signal on the unlicensed spectrum, which not only ensures the reliability of the signal transmission, but also fully utilizes the unlicensed spectrum, so that the operator only needs a small amount of downlink resources. It can simultaneously utilize a large amount of unlicensed spectrum, saving network resource overhead.

In a possible design, the base station sends the information including the corresponding relationship to each terminal on the authorized spectrum, by implementing, by the base station, a broadcast signal, in the broadcast signal, on the licensed spectrum. Carrying the information of the corresponding relationship. The reliability of signal transmission is improved by the base station transmitting a broadcast signal such as a broadcast signal on the licensed spectrum.

In a possible design, the base station periodically sends a first synchronization signal on the licensed spectrum according to a first transmission period, and is used by the terminal to perform first time-frequency offset correction. The reliability of signal transmission is improved by the base station transmitting a synchronization signal such as a synchronization signal on the licensed spectrum.

In a possible design, the base station periodically sends a second synchronization signal on the unlicensed spectrum according to a second transmission period, and is used as a basis for the terminal to correct the first time-frequency offset. The second time-frequency offset correction is performed. In this way, by transmitting the synchronization signal on both the licensed spectrum and the unlicensed spectrum, since the transmission frequency of the licensed spectrum is high, the duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the synchronization signal transmitted on the unlicensed spectrum can be obtained. Accurate time-frequency offset estimation, accurate time-frequency offset correction, to ensure correct signal transmission and reception.

In a possible design, if the time-frequency resource location is on the licensed spectrum, the base And notifying, by the station, the signal sending manner to the respective terminal, where the signal sending manner is used to indicate that each terminal sends data to the base station in a random manner or a contention manner according to the corresponding relationship; or The signaling manner is further configured to instruct the each terminal to send data to the base station according to the manner scheduled by the base station. In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

On the other hand, another communication method is provided, the method includes: receiving, by the terminal, a correspondence between different terminal groups notified by the base station and a set of different time-frequency resource locations on the licensed spectrum, and determining the terminal according to the correspondence a set of time-frequency resource locations corresponding to the terminal group, where the time-frequency resource location is located on the unlicensed spectrum; and the terminal is selected to send in the set of corresponding time-frequency resource locations on the unlicensed spectrum The time-frequency resource location of the data is sent to the base station according to the selected time-frequency resource location. In this way, the unlicensed spectrum can be fully utilized, so that operators can use a large amount of unlicensed spectrum at the same time with only a small amount of downlink resources, thereby saving network resource overhead.

In a possible design, the terminal carries the identification information of the terminal in the data sent to the base station. This makes it easy for the base station to recognize the terminal.

In a possible design, the terminal receives the first synchronization signal sent by the base station on the licensed spectrum, and performs first time-frequency offset correction according to the first synchronization signal.

In a possible design, the terminal receives the second synchronization signal sent by the base station on the unlicensed spectrum, and performs, according to the second synchronization signal, on the basis of the first time-frequency offset correction. The second time-frequency offset correction. The duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the signal is correctly transmitted and received.

In a possible design, if the time-frequency resource location is located on the licensed spectrum, the terminal further receives a signal transmission manner notified by the base station on the licensed spectrum; and determines according to the signal transmission manner. And selecting, according to the corresponding relationship, a time-frequency resource location to send data to the base station in a set of corresponding time-frequency resource locations in a random manner or a contention manner; or, according to the signal transmission manner, according to a manner scheduled by the base station to the base station send data. In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

In another aspect, an embodiment of the present application provides a communication device having a function of implementing a behavior of a base station in any of the foregoing method designs. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In another aspect, the embodiment of the present application provides a communication device, which has a function of implementing terminal behavior in any of the above method designs. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In still another aspect, an embodiment of the present application provides a base station, where the base station includes a transceiver, a memory, and a processor, where the memory is used to store a set of programs, and the processor is configured to invoke the memory storage. The program is configured to: perform a correspondence between a different terminal group and a set of different time-frequency resource locations, where the time-frequency resource location is on the unlicensed spectrum; and the information including the corresponding relationship is passed on the licensed spectrum The transceiver is sent to each terminal, where the correspondence is used to indicate that a terminal located in the same terminal group sends data to the base station in a corresponding set of time-frequency resource locations; the base station receives on the unlicensed spectrum The data sent by each terminal. In this way, the base station occupies the licensed spectrum to indicate that the terminal occupies the corresponding time-frequency resource to transmit the uplink signal on the unlicensed spectrum, which not only ensures the reliability of the signal transmission, but also fully utilizes the unlicensed spectrum, so that the operator only needs a small amount of downlink resources. It can simultaneously utilize a large amount of unlicensed spectrum, saving network resource overhead.

In a possible design, the processor is further configured to: send, by using the transceiver, a broadcast signal on the licensed spectrum, where the information of the correspondence is carried in the broadcast signal. The reliability of signal transmission is improved by the base station transmitting a broadcast signal such as a broadcast signal on the licensed spectrum.

In a possible design, the processor is further configured to periodically send, by using the transceiver, a first synchronization signal on the licensed spectrum according to a first sending period, where the terminal performs the One-time frequency offset correction. The reliability of signal transmission is improved by the base station transmitting a synchronization signal such as a synchronization signal on the licensed spectrum.

In a possible design, the processor is further configured to periodically send, by using the transceiver, a second synchronization signal on the unlicensed spectrum for the terminal to be in the second transmission period. The second time-frequency offset correction is performed on the basis of the first time-frequency offset correction. In this way, by transmitting the synchronization signal on both the licensed spectrum and the unlicensed spectrum, since the transmission frequency of the licensed spectrum is high, the duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the synchronization signal transmitted on the unlicensed spectrum can be obtained. Accurate time-frequency offset estimation, accurate time-frequency offset correction, to ensure correct signal transmission and reception.

In a possible design, the processor is further configured to: if the time-frequency resource location is located on the licensed spectrum, notify the respective terminal of the signal sending manner by using the transceiver on the licensed spectrum, The signaling mode is used to instruct the respective terminals to send data to the base station in a random manner or in a contention manner according to the corresponding relationship; or the signal sending manner is further used to indicate that each terminal is scheduled according to the base station. The way to send data to the base station. In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

In still another aspect, an embodiment of the present application provides a terminal, where the structure of the terminal includes a transceiver, a memory, and a processor, where the memory is used to store a set of programs, and the processor is configured to invoke the memory storage. The program is configured to: receive, by using the transceiver, a correspondence between different terminal groups notified by the base station and a set of different time-frequency resource locations on the licensed spectrum, and determine, according to the correspondence, a terminal group where the terminal is located. Corresponding time-frequency resource location, the time-frequency resource location is located on the unlicensed spectrum; and the time-frequency resource location for transmitting data is selected in the set of corresponding time-frequency resource locations on the unlicensed spectrum, Data is transmitted to the base station through the transceiver in accordance with the selected time-frequency resource location. In this way, the unlicensed spectrum can be fully utilized, so that operators can use a large amount of unlicensed spectrum at the same time with only a small amount of downlink resources, thereby saving network resource overhead.

In a possible design, the processor is further configured to carry the identification information of the terminal in data sent by the transceiver to the base station. This makes it easy for the base station to recognize the terminal.

In a possible design, the processor is further configured to receive, by using the transceiver, a first synchronization signal sent by the base station on the licensed spectrum, and performing a first time-frequency according to the first synchronization signal. Partial correction.

In a possible design, the processor is further configured to receive, by the transceiver, a second synchronization signal sent by the base station on the unlicensed spectrum, according to the second synchronization signal, in the The second time-frequency offset correction is performed on the basis of the first time-frequency offset correction. The duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the signal is correctly transmitted and received.

In a possible design, the processor is further configured to: when the time-frequency resource location is located on the licensed spectrum, receive, by the transceiver, a signal notified by the base station on the licensed spectrum. And transmitting, according to the signal sending manner, determining, according to the corresponding relationship, selecting a time-frequency resource location in a set of corresponding time-frequency resource locations in a random manner or a contention manner to send data to the base station; or sending according to the signal The method sends data to the base station in a manner scheduled by the base station. In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

In the embodiment of the present application, the base station sends important control signals such as a synchronization signal, a broadcast signal, and a feedback signal on the licensed spectrum, thereby improving the frequency and reliability of the signal transmission, and carrying the terminal group and the time-frequency resource location in the broadcast signal. The corresponding relationship of the set indicates that the terminal occupies the corresponding time-frequency resource to transmit the uplink signal on the unlicensed spectrum, and fully utilizes the unlicensed spectrum, so that the operator can use a large amount of unlicensed spectrum at the same time, requiring only a small amount of downlink resources, saving Network resource overhead.

DRAWINGS

1 is a schematic structural diagram of a system in an embodiment of the present application;

2 is a flowchart of a communication method in an embodiment of the present application;

3 is a schematic diagram of channel parameters in an embodiment of the present application;

4 is a second schematic diagram of channel parameters in the embodiment of the present application;

FIG. 5 is a schematic diagram of a correspondence relationship between a terminal group and a time-frequency resource location set in the embodiment of the present application;

FIG. 6 is a second schematic diagram of a correspondence between a terminal group and a time-frequency resource location set according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 8 is a second schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a terminal in an embodiment of the present application.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

In the application scenario of the massive connection of the massive terminal, in order to save the input overhead of the system resources, the base station in the embodiment of the present application uses the licensed spectrum to notify each terminal of a selectable range of time-frequency resources, and the terminal can select a range of time-frequency resources during uplink transmission. The uplink data is sent in a competitive manner. In this way, the base station uses only a small portion of the time-frequency resources, so that the terminal can use a large amount of unlicensed spectrum resources, which greatly saves the input overhead of system resources.

The embodiments of the present application may be, but are not limited to, an application scenario applicable to a massive connection of a massive terminal, such as an M2M system. The M2M system is a networked application and service centered on intelligent interaction of machine terminals. M2M technology provides a means for devices to establish wireless connections and transfer data between systems, between remote devices, or between individuals in real time. It can monitor, command and dispatch, collect data and measure the machine by embedding a wireless communication module inside the machine. There are many application scenarios for M2M systems, such as smart meter reading systems, environmental monitoring, remote monitoring, and so on.

The system architecture involved in the embodiment of the present application is as shown in FIG. 1, and includes a base station 101 and a terminal 102. The base station 101 may also be referred to as a control node or an access node, and the base station 101 is configured to send signals such as a synchronization signal, a broadcast signal, and a control signal, and is responsible for scheduling each terminal 102 to transmit or receive signals. The terminal 102 listens to the synchronization signal, the broadcast signal, and the control signal of the base station 101, and accesses the base station 101.

The communication method and device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings and preferred embodiments.

Referring to FIG. 2, the communication method provided by the embodiment of the present application is as follows.

Step 201: The base station sets a correspondence between different terminal groups and sets of different time-frequency resource locations, where the time-frequency resource location is located on the unlicensed spectrum.

Specifically, the base station may group the terminals to form a plurality of terminal groups. It is also possible that the base station and the terminal negotiate the grouping relationship of the terminal group in advance. The rules of grouping are not limited in the embodiment of the present application.

Step 202: The base station sends the information about the corresponding relationship to each terminal on the authorized spectrum. The corresponding relationship is used to indicate that the terminal located in the same terminal group sends data to the base station in the corresponding set of time-frequency resource locations.

Specifically, the terminals in the same terminal group occupy a set of corresponding time-frequency resource locations in a contention manner or a random manner.

Step 203: The terminal receives the correspondence between different terminal groups notified by the base station and the set of different time-frequency resource locations on the authorized spectrum, and determines, according to the correspondence, a set of time-frequency resource locations corresponding to the terminal group where the terminal is located.

Step 204: The terminal selects a time-frequency resource location for transmitting data in the set of corresponding time-frequency resource locations on the unlicensed spectrum, and sends data to the base station according to the selected time-frequency resource location. The base station receives data sent by the respective terminals on the unlicensed spectrum.

Specifically, if an unlicensed spectrum is used, there is a certain requirement in the regulations for the duty cycle of the device to occupy the unlicensed spectrum. In the embodiment of the present application, according to the division of the unlicensed spectrum resources occupied by the terminal in step 201 and step 202, the terminal can be instructed to occupy the unlicensed spectrum in an orderly manner, and the resource utilization ratio of the unlicensed spectrum occupied by the terminal is improved. However, if the base station notifies the time-frequency resource used by each terminal, it will occupy a large amount of downlink resources to notify. In the embodiment of the present application, the base station notifies the correspondence between the terminal group and the occupied time-frequency resource location, which is reliable. Notifying the time-frequency resource location occupied by the terminal enables the terminal to occupy the time-frequency resources in an orderly manner, and can also greatly reduce the occupation of the downlink resources.

The specific notification manner is that the base station sends a broadcast signal on the licensed spectrum, and the broadcast signal carries the information of the corresponding relationship. Alternatively, the base station and the terminal may set the foregoing correspondence in advance. The base station periodically transmits a broadcast signal on the licensed spectrum, and the broadcast signal can also be carried. Information for indicating information of an uplink frequency band supported by the base station and corresponding channel parameters.

The above channel parameters may be parameters such as channel bandwidth and subcarrier spacing. For example, as shown in FIG. 3, the subcarrier width is 3.75 Hz, the subcarrier spacing is 3.75 Hz, and the bandwidth of each subchannel is 30 kHz. As shown in FIG. 4, the subcarrier width and the subcarrier spacing are both 15 kHz, and each subchannel bandwidth is 30 kHz.

In addition to transmitting broadcast signals on the licensed spectrum, the base station also transmits some important control type signals, such as a synchronization signal for the terminal to perform time-frequency offset correction, a feedback signal for receiving a signal transmitted by the terminal, and the like.

Since the base station is a synchronization signal transmitted on the licensed spectrum and receives data transmitted by the terminal on the unlicensed spectrum, there may be a case where the frequency interval between the licensed spectrum and the unlicensed spectrum is large, such as When the 2.4 GHz band and the Sub1 GHz band are respectively occupied, the time-frequency offset estimation is performed on the licensed spectrum through the transmitted synchronization signal terminal, and there is a certain error with the frequency offset of the unlicensed spectrum. In this case, in the embodiment of the present application, the coarse frequency offset estimation may be performed on the licensed spectrum first, and then the fine frequency offset estimation may be performed on the unlicensed spectrum. Specifically, the base station is in the authorized spectrum, according to the a first transmission signal is periodically sent for the terminal to perform the first time-frequency offset correction; the base station periodically transmits the second synchronization signal according to the second transmission period on the unlicensed spectrum, and is used by the terminal. The second time-frequency offset correction is performed on the basis of the first time-frequency offset correction. The second sending period may be greater than the first sending period. The first synchronization signal and the second synchronization signal may be the same or different. If different, the base station and the terminal need to be agreed in advance. Because the licensed spectrum has no duty cycle limitation, that is, it is not limited by the transmission duration, the base station can transmit the synchronization signal on the licensed spectrum according to the higher frequency, and the terminal can quickly obtain the coarse time frequency offset estimation in the licensed spectrum. The unlicensed spectrum has a duty cycle limitation, that is, it is limited by the transmission duration. The base station can only transmit the synchronization signal at a lower frequency, and the terminal can also perform the fine time frequency offset estimation more accurately on the unlicensed spectrum. In this way, by transmitting the synchronization signal on both the licensed spectrum and the unlicensed spectrum, since the transmission frequency of the licensed spectrum is high, the duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the synchronization signal transmitted on the unlicensed spectrum can be obtained. Accurate time-frequency offset estimation, accurate time-frequency offset correction, to ensure correct signal transmission and reception.

The base station sets a correspondence between different terminal groups and sets of different time-frequency resource locations, where The time-frequency resource location is on the unlicensed spectrum

The set of time-frequency resource locations described in step 201 may be only a set of equally spaced transmission time windows, as shown in FIG. 5; or may be a plurality of equal-interval time, equal-interval frequency resource sets, as shown in FIG. .

In FIG. 5, the base station groups the terminals, and the formed terminal groups are

terminal groups

1, 2, and 3, respectively. As can be seen from FIG. 5, in the time domain, the terminal group 1 is allocated equal time window sets, that is, equal intervals. The time domain resources, for example, the time interval is t1, and the terminals in the terminal group 1 occupy the corresponding time window set in a contention manner. Similarly, the terminal group 2 and the terminal group 3 are also allocated equally spaced time domain resources.

FIG. 6 shows two terminal groups, namely, a terminal group 1 and a terminal group 2, and the base station allocates equally spaced time-frequency resource locations for the terminal group 1 and the terminal group 2, respectively, indicating that the terminal is in the corresponding time-frequency resource location. Send data in a competitive manner. For example, in step 205, the terminal in the terminal group 1 can arbitrarily select one time-frequency resource location in the set of time-frequency resource locations corresponding to the terminal group 1 shown in FIG. 6 to transmit data to the base station.

For the terminal side, the terminal receives the broadcast signal sent by the base station on the licensed spectrum, determines the corresponding relationship notified by the base station according to the broadcast signal, and finds the time-frequency resource corresponding to the group according to the corresponding relationship when it needs to send the uplink data. The set of locations randomly selects a time-frequency resource location in the corresponding set, and occupies the location to send data to the base station. Since different terminal groups send data according to the set of respective time-frequency resource locations, collisions of reporting are not generated between different terminal groups, that is, the possibility of data collision occurs when a large number of terminals are reported at the same time, thereby improving the system. Transmission reliability.

Although the resources of the terminal are restricted to a set of time-frequency resource locations, the terminal carries the identification information of the time-frequency resource location in a contention manner, and therefore, the terminal carries the identifier information of the terminal in the uplink data sent to the base station. In this way, after receiving the data, the base station can determine which terminal is transmitting the data.

The method provided by the foregoing embodiment of the present application is also applicable to the case where the time-frequency resource location is located in the licensed spectrum. That is, the time-frequency resource location in the above-mentioned correspondence relationship set by the base station is located on the licensed spectrum.

If the time-frequency resource location is on the licensed spectrum, the base station also passes to each terminal on the licensed spectrum. The signal transmission mode is used to indicate that each terminal sends data to the base station in a random manner or in a contention manner according to the foregoing correspondence relationship; or the signal transmission mode is further used to instruct each terminal to send data to the base station according to the manner scheduled by the base station.

Specifically, if the resource occupied by the terminal is the authorized spectrum, the base station sends a signal sending manner in the broadcast message, and informs the terminal whether the data is sent in a random manner or a contention manner or a scheduling manner. If the random mode or the contention mode is used, the terminal needs to According to the foregoing correspondence, a resource transmission data is randomly selected in the corresponding set of time-frequency resource locations; if the scheduling mode is adopted, it indicates that the terminal needs to use the resource to transmit data according to the scheduling information of the base station, and the base station carries the scheduled terminal in the scheduling information. The identification information and the allocated resource location information indicate that the corresponding terminal sends data according to the allocated resource location information.

In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

Based on the same inventive concept, referring to FIG. 7, the embodiment of the present application further provides a communication device 700, including: a processing unit 701, a sending unit 702, and a receiving unit 703.

The processing unit 701 is configured to set a correspondence between different terminal groups and sets of different time-frequency resource locations, where the time-frequency resource location is located on the unlicensed spectrum;

The sending unit 702 is configured to send the information about the corresponding relationship set by the processing unit 701 to each terminal on the authorized spectrum, where the correspondence is used to indicate that the terminal located in the same terminal group sends the set of the corresponding time-frequency resource location to the base station. data;

The receiving unit 703 is configured to receive data sent by each terminal on the unlicensed spectrum.

Optionally, the sending unit 702 is configured to:

A broadcast signal is transmitted on the licensed spectrum, and the corresponding information is carried in the broadcast signal.

Optionally, the sending unit 702 is further configured to:

On the licensed spectrum, the first synchronization signal is periodically sent according to the first transmission period, and is used by the terminal to perform the first time-frequency offset correction.

Optionally, the sending unit 702 is further configured to:

On the unlicensed spectrum, periodically transmitting the second synchronization signal according to the second transmission period, The second time-frequency offset correction is performed on the basis of the first time-frequency offset correction.

Optionally, it also includes:

If the time-frequency resource location set by the processing unit 701 is located on the authorized spectrum, the sending unit 702 is further configured to notify each terminal of the signal sending manner on the authorized spectrum, where the signal sending manner is used to indicate that each terminal adopts a random manner according to the corresponding relationship or The content mode is used to send data to the base station. The signal transmission mode is also used to indicate that each terminal sends data to the base station according to the mode scheduled by the device.

Based on the same inventive concept, as shown in FIG. 8 , the embodiment of the present application further provides a communication device 800, including: a receiving unit 801, a selecting unit 802, and a sending unit 803.

The receiving unit 801 is configured to receive, on the licensed spectrum, a correspondence between different terminal groups notified by the base station and a set of different time-frequency resource locations, and determine, according to the correspondence, a set of time-frequency resource locations corresponding to the terminal group where the device is located, The frequency resource location is on the unlicensed spectrum;

The selecting unit 802 is configured to select a time-frequency resource location for transmitting data in a set of corresponding time-frequency resource locations;

The sending unit 803 is configured to send data to the base station according to the time-frequency resource location selected by the selecting unit 802 on the unlicensed spectrum.

Optionally, the sending unit 803 is further configured to:

The identification information of the device is carried in the data sent to the base station.

Optionally, the communication device 800 further includes a synchronization unit 804;

The receiving unit 801 is further configured to receive the first synchronization signal sent by the base station on the licensed spectrum, and the synchronization unit 804 is further configured to perform the first time-frequency offset correction according to the first synchronization signal received by the receiving unit 801.

Optionally, the receiving unit 801 is further configured to: receive the second synchronization signal sent by the base station on the unlicensed spectrum, and the synchronization unit 804 is further configured to: perform the first time-frequency offset correction according to the second synchronization signal received by the receiving unit 801. The second time-frequency offset correction is performed on the basis.

Optionally, further comprising a determining unit 805;

The receiving unit 801 is further configured to receive a signal sending manner notified by the base station on the licensed spectrum, if the time-frequency resource location is located on the authorized spectrum.

The determining unit 805 is configured to: according to the signal sending manner received by the receiving unit 801, determine, according to the corresponding relationship, use a random manner or a contention manner to select a time-frequency resource location to send data to the base station in a set of corresponding time-frequency resource locations; or, according to the receiving unit The signal transmission mode received by 801 transmits data to the base station according to the manner scheduled by the base station.

Based on the same inventive concept, as shown in FIG. 9, the embodiment of the present application provides a base station 900. The base station 900 includes a transceiver 901, a processor 902, and a memory 903. The memory 903 is configured to store a set of programs. The processor 902 is configured to invoke a program stored in the memory 903 to perform the following operations: setting a correspondence between different terminal groups and sets of different time-frequency resource locations, where the time-frequency resource location is on the unlicensed spectrum; The information including the corresponding relationship is sent to each terminal by the transceiver, and the corresponding relationship is used to indicate that the terminals located in the same terminal group send data to the base station in the corresponding set of time-frequency resource locations; the base station receives the information sent by each terminal on the unlicensed spectrum. data. In this way, the base station occupies the licensed spectrum to indicate that the terminal occupies the corresponding time-frequency resource to transmit the uplink signal on the unlicensed spectrum, which not only ensures the reliability of the signal transmission, but also fully utilizes the unlicensed spectrum, so that the operator only needs a small amount of downlink resources. It can simultaneously utilize a large amount of unlicensed spectrum, saving network resource overhead.

In a possible design, the processor 902 is further configured to: send, by using the transceiver 901, a broadcast signal on the licensed spectrum, and carry the information of the corresponding relationship in the broadcast signal. The reliability of signal transmission is improved by the base station transmitting a broadcast signal such as a broadcast signal on the licensed spectrum.

In a possible design, the processor 902 is further configured to periodically send the first synchronization signal by the transceiver 901 according to the first transmission period on the licensed spectrum, for the terminal to perform the first time-frequency offset correction. The reliability of signal transmission is improved by the base station transmitting a synchronization signal such as a synchronization signal on the licensed spectrum.

In a possible design, the processor 902 is further configured to periodically send, by using the transceiver 901, a second synchronization signal on the unlicensed spectrum for the first time-frequency offset correction of the terminal according to the second transmission period. Based on the second time-frequency offset correction. In this way, by transmitting the synchronization signal on both the licensed spectrum and the unlicensed spectrum, since the transmission frequency of the licensed spectrum is high, the duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the synchronization signal transmitted on the unlicensed spectrum can be obtained. Quasi Accurate time-frequency bias estimation, accurate time-frequency offset correction, to ensure correct signal transmission and reception.

In a possible design, the processor 902 is further configured to: if the time-frequency resource location is located on the licensed spectrum, notify the respective terminal of the signal sending manner by using the transceiver 901 on the licensed spectrum, and the signal sending manner is used to indicate each terminal. The data is sent to the base station in a random manner or in a contention manner according to the corresponding relationship; or the signal sending manner is further used to indicate that each terminal sends data to the base station according to the manner scheduled by the base station. In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

Based on the same inventive concept, referring to FIG. 10, an embodiment of the present application provides a terminal 1000. The structure of the terminal 1000 includes a transceiver 1001, a memory 1003, and a processor 1002. The memory 1003 is configured to store a set of programs. The processor 1002 is configured to invoke the program stored in the memory 1003 to perform the following operations: receiving, by the transceiver, a correspondence between different terminal groups notified by the base station and different sets of time-frequency resource locations on the licensed spectrum, and determining according to the correspondence relationship a set of time-frequency resource locations corresponding to the terminal group in which the terminal is located, where the time-frequency resource location is located on the unlicensed spectrum; and on the unlicensed spectrum, selecting a time-frequency resource location for transmitting data in the set of corresponding time-frequency resource locations Transmitting data to the base station through the transceiver according to the selected time-frequency resource location. In this way, the unlicensed spectrum can be fully utilized, so that operators can use a large amount of unlicensed spectrum at the same time with only a small amount of downlink resources, thereby saving network resource overhead.

In a possible design, the processor 1002 is further configured to carry the identification information of the terminal in the data sent to the base station by the transceiver 1001. This makes it easy for the base station to recognize the terminal.

In a possible design, the processor 1002 is further configured to receive, by the transceiver 1001, the first synchronization signal sent by the base station on the licensed spectrum, and perform the first time-frequency offset correction according to the first synchronization signal.

In a possible design, the processor 1002 is further configured to receive, by using the transceiver 1001, the second synchronization signal sent by the base station on the unlicensed spectrum, and perform the first time-frequency offset correction according to the second synchronization signal. The second time-frequency offset correction. The duration of detecting the synchronization signal by the terminal can be reduced, and at the same time, the signal is correctly transmitted and received.

In a possible design, the processor 1002 is further configured to: if the time-frequency resource location is located on the licensed spectrum, receive a signal transmission manner notified by the base station through the transceiver 1001 on the licensed spectrum; According to the signal transmission mode, the time-frequency resource location is selected to be sent to the base station in a set of corresponding time-frequency resource locations according to the corresponding relationship in a random manner or a contention manner; or, according to the signal transmission manner, the data is transmitted to the base station according to the manner scheduled by the base station. In this way, the resources of the licensed spectrum and the unlicensed spectrum can be utilized simultaneously to improve the utilization of available resources of the system.

In summary, in the embodiment of the present application, the base station sends important control signals such as a synchronization signal, a broadcast signal, and a feedback signal on the licensed spectrum, thereby improving the frequency and reliability of the signal transmission, and carrying the terminal grouping in the broadcast signal. The correspondence between the set of time-frequency resource locations indicates that the terminal occupies the corresponding time-frequency resource to transmit the uplink signal on the unlicensed spectrum, and fully utilizes the unlicensed spectrum, so that the operator only needs a small amount of downlink resources and can simultaneously utilize a large number of Unlicensed spectrum saves network resource overhead.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A communication method, comprising:

The base station sets a correspondence between different terminal groups and sets of different time-frequency resource locations, where the time-frequency resource location is located on the unlicensed spectrum;

And transmitting, by the base station, the information that includes the corresponding relationship to each terminal on the authorized spectrum, where the correspondence is used to indicate that the terminal located in the same terminal group sends data to the base station in a set of corresponding time-frequency resource locations;

The base station receives data sent by the respective terminals on the unlicensed spectrum.
The method of claim 1, wherein the base station sends information including the corresponding relationship to each terminal on the licensed spectrum, including:

The base station sends a broadcast signal on the licensed spectrum, and carries information of the corresponding relationship in the broadcast signal.
The method of claim 1 or 2, further comprising:

The base station periodically sends a first synchronization signal on the licensed spectrum according to the first transmission period, and is used by the terminal to perform first time-frequency offset correction.
The method of claim 3, further comprising:

The base station periodically transmits a second synchronization signal according to the second transmission period on the unlicensed spectrum, and is used by the terminal to perform second time-frequency offset correction on the basis of the first time-frequency offset correction. .
The method of any of claims 1-4, further comprising:

And if the time-frequency resource location is located on the authorized spectrum, the base station further notifies the respective terminal of a signal sending manner on the authorized spectrum, where the signal sending manner is used to indicate that each terminal according to the corresponding relationship The data is sent to the base station in a random manner or in a contention manner; or the signal sending manner is further used to indicate that each terminal sends data to the base station according to the manner scheduled by the base station.
A communication method, comprising:

Receiving, by the terminal, a correspondence between different terminal groups notified by the base station and a set of different time-frequency resource locations, and determining, according to the correspondence, a set of time-frequency resource locations corresponding to the terminal group where the terminal is located, The time-frequency resource location is on the unlicensed spectrum;

The terminal selects a time-frequency resource location for transmitting data in the set of corresponding time-frequency resource locations on the unlicensed spectrum, and sends data to the base station according to the selected time-frequency resource location.
The method of claim 6 further comprising:

The terminal carries the identification information of the terminal in the data sent to the base station.
The method of claim 6 or claim 7, further comprising:

Receiving, by the terminal, the first synchronization signal sent by the base station on the licensed spectrum, and performing first time-frequency offset correction according to the first synchronization signal.
The method of claim 8 further comprising:

The terminal receives the second synchronization signal sent by the base station on the unlicensed spectrum, and performs second time-frequency offset correction on the basis of the first time-frequency offset correction according to the second synchronization signal.
The method of any of claims 6-9, further comprising:

And if the time-frequency resource location is located on the authorized spectrum, the terminal further receives a signal sending manner notified by the base station on the licensed spectrum;

Determining, according to the signal sending manner, selecting, according to the corresponding relationship, a time-frequency resource location in a set of corresponding time-frequency resource locations in a random manner or a contention manner to send data to the base station; or, according to the signal sending manner, according to the base station The manner of scheduling sends data to the base station.
A communication device, comprising:

a processing unit, configured to set a correspondence between different terminal groups and a set of different time-frequency resource locations, where the time-frequency resource location is located on the unlicensed spectrum;

a sending unit, configured to send information about the corresponding relationship that is set by the processing unit to each terminal, where the correspondence is used to indicate that the terminal located in the same terminal group is at a corresponding time-frequency resource location The set transmits data to the base station;

And a receiving unit, configured to receive data sent by the respective terminals on the unlicensed spectrum.
The device according to claim 11, wherein said transmitting unit is configured to:

Transmitting a broadcast signal on the licensed spectrum, and carrying the information of the correspondence relationship in the broadcast signal.
The device according to claim 11 or 12, wherein the sending unit is further configured to:

And transmitting, on the licensed spectrum, a first synchronization signal periodically for the terminal to perform first time-frequency offset correction according to the first transmission period.
The device according to claim 13, wherein the sending unit is further configured to:

And transmitting, on the unlicensed spectrum, a second synchronization signal periodically according to the second transmission period, where the terminal performs second time-frequency offset correction on the basis of the first time-frequency offset correction.
The device according to any one of claims 11 to 14, further comprising:

And if the time-frequency resource location set by the processing unit is located on the licensed spectrum, the sending unit is further configured to notify the respective terminal of a signal sending manner on the authorized spectrum, where the signal sending manner is used. Instructing each of the terminals to send data to the base station in a random manner or in a contention manner according to the corresponding relationship; or the signaling manner is further used to indicate that each terminal sends the data to the base station according to the manner scheduled by the device. data.
A communication device, comprising:

a receiving unit, configured to receive, on the licensed spectrum, a correspondence between different terminal groups notified by the base station and a set of different time-frequency resource locations, and determine, according to the correspondence, a time-frequency resource location corresponding to the terminal group where the device is located The set, the time-frequency resource location is located on the unlicensed spectrum;

a selecting unit, configured to select a time-frequency resource location for transmitting data in a set of corresponding time-frequency resource locations;

And a sending unit, configured to send data to the base station according to the time-frequency resource location selected by the selecting unit on the unlicensed spectrum.
The device according to claim 16, wherein the sending unit is further configured to:

The identification information of the device is carried in the data sent to the base station.
The device according to claim 16 or 17, further comprising a synchronization unit;

The receiving unit is further configured to receive, on the licensed spectrum, a first synchronization sent by the base station And the synchronization unit is further configured to perform first time-frequency offset correction according to the first synchronization signal received by the receiving unit.
The device according to claim 18, wherein the receiving unit is further configured to receive a second synchronization signal sent by the base station on the unlicensed spectrum, and the synchronization unit is further configured to receive according to the The second synchronization signal received by the unit performs a second time-frequency offset correction on the basis of the first time-frequency offset correction.
The device according to any one of claims 16 to 19, further comprising a determining unit;

And receiving, by the receiving unit, a signal sending manner notified by the base station on the licensed spectrum, if the time-frequency resource location is located on the licensed spectrum;

The determining unit is configured to: according to the signal sending manner received by the receiving unit, determine, according to the corresponding relationship, select a time-frequency resource location to the base station in a set of corresponding time-frequency resource locations according to a random manner or a contention manner. Transmitting data; or transmitting data to the base station according to the manner in which the base station schedules according to the signal transmission manner received by the receiving unit.