JP2021052424A - Method, terminal, and base station for data transmission - Google Patents

Abstract

To provide a method and apparatus for data transmission that allow a terminal to receive downlink control signaling transmitted from a low frequency cell and to reduce processes and signaling overhead of high speed data services when high speed data transmission is needed.SOLUTION: A method for data transmission in which a terminal can receive downlink control signaling in a low frequency band and can perform data transmission to and from a high frequency cell when high speed data transmission is needed comprises: by the terminal, receiving in a first cell that uses a first frequency band, when not transmitting data, using first instruction information to instruct the terminal that receives the first instruction information to transmit data by using a second frequency band; and by the terminal, performing data transmission in a second cell that uses the second frequency band according to the first instruction information when the data transmission is needed.SELECTED DRAWING: Figure 2

Description

The present invention relates to the field of communication, and more specifically to methods for data transmission, terminals and base stations.

As the demands for data transmission rate and communication quality of mobile communication increase, the wide band width of high frequency band is introduced into wireless communication. The terminal can receive downlink control signaling such as system information or paging information via a narrow bandwidth cell in a low frequency band, and can perform high-speed data transmission through a wide bandwidth cell in a high frequency band.

Currently, to avoid the problem of high receive power consumption caused by idle terminals receiving downlink signaling over wide bandwidth links in the high frequency band, the terminals are narrowband in the low frequency band. A technique is known that can stay in a cell of width, enter an idle state, and receive system information and paging information in the low frequency band. When the terminal transmits uplink data, high-speed data transmission can be performed by the terminal accessing a wide-bandwidth cell in a high frequency band.

However, in order for the terminal to perform high-speed data transmission through the high-frequency band wideband cell, the terminal must access the cell, which results in a long process of initiating high-speed data transmission and signaling overhead. large.

The present invention provides as much as possible when the terminal needs to maintain synchronization with the low frequency band cell and the high frequency band cell at the same time, receive the downlink control signaling transmitted from the low frequency band cell, and perform high speed data transmission. Provide methods and devices for data transmission that provide fast access to high frequency band cells or data transmission with high frequency band cells, thereby reducing the process and signaling overhead of high speed data services.

In the first aspect, the invention provides a method for data transmission. The method receives the first instruction information in a first cell that uses the first frequency band when the terminal does not transmit data, and the first instruction information needs to transmit data. It is used to instruct the terminal that received the first instruction information to transmit data using the second frequency band, and the terminal performs data transmission based on the first instruction information. Includes performing data transmission in a second cell that uses the second frequency band when it needs to be done.

Here, the fact that the terminal is in the non-data transmission state means that the terminal is in the idle state, or the context of the terminal is still maintained at the previous serving base station, but the terminal is subject to cell selection or cell reelection rules. It may be understood that mobility management can be performed. In other words, the mobility of the terminal is not directly controlled by the network.

By completing the synchronization with the target cell in advance in the first frequency band, the terminal performs data transmission with the target cell when it is necessary to perform data transmission, and the terminal stays in the high frequency band for downlink control signaling. By avoiding the high power consumption that can be caused by receiving the data and at the same time completing the synchronization with the target cell in advance, it is possible to perform data transmission with the target cell when it is necessary to perform data transmission. Compared with the technology, the cell access process in the prior art is significantly reduced and the signaling overhead is reduced.

In combination with the first aspect, in the first possible embodiment of the first aspect, a second frequency band is used when the terminal needs to perform data transmission based on the first instruction information. Performing data transmission in the second cell means that the terminal determines one or more second cells that use the second frequency band as target cells based on the first instruction information. The terminal includes cell synchronization with the target cell, and when the terminal needs to perform data transmission, data transmission with the target cell using the second frequency band is included.

The terminal transmits data to the target cell by determining one or more second cells as the target cell according to the cell selection or cell reselection rule.

In the second possible embodiment of the first aspect, in combination with the first aspect or the above-mentioned possible embodiment thereof, the first instruction information is transmitted by the first base station via the first cell. The transmitted paging information or the paging information and the arrangement information of the target cell, and the first instruction information is the second frequency band information and / or the base station information to which the target cell belongs and / or the target cell. One or more that include information, the first base station is the base station to which the first cell belongs, and the terminal uses the second frequency band based on the first instruction information. To determine the second cell as the target cell, the terminal determines the target cell based on the paging information, or the terminal determines the target cell based on the paging information and the arrangement information of the target cell. Includes determining the target cell.

When downlink data transmission needs to be performed, the first base station uses paging information to provide the second frequency band information and / or target base station information and / or target cell information for which the terminal needs to perform data transmission. Can be shown. Alternatively, the first base station may indicate the second frequency band information and / or the target base station information and / or the target cell information in which the terminal needs to perform data transmission by the paging information and the target cell arrangement information. This allows the terminal to search for the target cell within a smaller range and improve the efficiency of determining the target cell.

In the third possible embodiment of the first aspect, in combination with the first aspect or the above possible embodiment thereof, the first instructional information is transmitted by the first base station via the first cell. It is the transmitted system information of the second cell, and the system information of the second cell is the frequency band information of the second cell and / or the base station information to which the second cell belongs and / or the second. The first cell in the first cell that uses the first frequency band when the first base station is the base station to which the first cell belongs and the terminal does not transmit data. To receive the instruction information of the terminal receives the system information of at least one second cell in the first cell in which the terminal uses the first frequency band, and receives the system information of the at least one second cell. One or more second cells in which the terminal has a one-to-one correspondence with at least one second cell and the terminal uses the second frequency band based on the first instruction information. As the target cell, the terminal determines one or more second cells from the at least one second cell as the target cell based on the system information of the at least one second cell. Including doing.

When it is necessary to perform uplink data transmission, the terminal follows the cell selection or cell reselection rule according to the second frequency band information and / or the second base station information and / or the second cell information shown in the system information. The target cell can be determined and uplink data transmission can be performed.

In combination with the first aspect or the above possible embodiment thereof, in the fourth possible embodiment of the first aspect, the terminal performing cell synchronization with the target cell means that the terminal is said to have the second aspect. In the frequency band, an uplink synchronization request is transmitted to a target base station to which the target cell belongs, and the uplink synchronization request is used to acquire uplink synchronization information between the terminal and the target cell, and the terminal. Receives the uplink synchronization information in the first cell, the uplink synchronization information is acquired from the target base station by the first base station, and the uplink synchronization information is acquired by the target base station. Confirmed in response to the synchronization request, the first base station is the base station to which the first cell belongs, and the terminal performs uplink synchronization with the target cell based on the uplink synchronization information. And include.

The terminal can send an uplink synchronization request in the second frequency band indicated by the first instruction information, acquire the uplink synchronization information of the target cell and the terminal, and perform uplink synchronization with the target cell.

In combination with the first aspect or the above possible embodiment thereof, in the fifth possible embodiment of the first aspect, the terminal performing cell synchronization with the target cell means that the terminal is said to be the first. The terminal receives the downlink synchronization information of the first cell in the cell, the terminal determines the downlink synchronization information of the target cell, and the terminal determines the downlink synchronization information of the target cell. Includes performing downlink synchronization with the target cell.

In combination with the first aspect or the above possible embodiment thereof, in the sixth possible embodiment of the first aspect, the terminal determines the downlink synchronization information of the target cell by the terminal. Receives at least one downlink synchronization offset information corresponding to the at least one second cell transmitted by the first base station via the first cell, and each downlink synchronization offset information corresponds to the corresponding. The time offset amount between the timing of the second cell and the timing of the first cell is included, the first base station is the base station to which the first cell belongs, and the terminal is at least one of the above. It includes determining the downlink synchronization information of the target cell based on the downlink synchronization offset information of the second cell.

The terminal can acquire the downlink synchronization information of the first cell and the downlink synchronization information of the target cell from the first base station, and can perform downlink synchronization with the target cell.

In a second aspect, the invention provides a method for data transmission. In the method, the first base station determines the first instruction information, and the first instruction information transmits data in a second cell that uses the second frequency band. It is used to instruct the terminal that received the instruction information, that the first base station is the base station to which the first cell that uses the first frequency band belongs, and that the first base station is said. It includes transmitting the first instruction information via the first cell.

By completing the synchronization with the target cell in advance in the first frequency band, the terminal performs data transmission with the target cell when it is necessary to perform data transmission, and the terminal stays in the high frequency band for downlink control signaling. By avoiding the high power consumption that can be caused by receiving the data and at the same time completing the synchronization with the target cell in advance, it is possible to perform data transmission with the target cell when it is necessary to perform data transmission. Compared with the technology, the cell access process in the prior art is significantly reduced and the signaling overhead is reduced.

In the first possible embodiment of the second aspect in combination with the second aspect, the first instruction information is paging information, or the paging information and target cell arrangement information, and the first instruction information. Includes the second frequency band information and / or the target base station information and / or the target cell information, the second cell includes the target cell, and the target base station is the base station to which the target cell belongs. Yes, and when the first base station transmits the first instruction information via the first cell, the first base station transmits the paging information via the first cell. That, or, the first base station includes transmitting the paging information and the arrangement information of the target cell via the first cell.

When downlink data transmission needs to be performed, the first base station indicates the second frequency band information and / or target base station information and / or target cell information in which the terminal needs to perform data transmission by paging information. be able to.

In the second possible embodiment of the second embodiment or the above possible embodiment thereof, the first instruction information is the system information of the second cell and the second aspect. The system information of the cell includes the frequency band information of the second cell and / or the base station information to which the second cell belongs and / or the second cell information, and the first base station is said. Sending the first instruction information through the first cell means that the first base station receives the system information of at least one second cell transmitted by at least one second base station. , The system information of the at least one second cell has a one-to-one correspondence with the at least one second cell, and the first base station passes through the first cell to the at least one first cell. Includes sending system information for the second cell.

When it is necessary to perform uplink data transmission, the terminal uses the second frequency band information and / or the second base station information and / or the second cell information shown in the system information to perform a cell selection or cell reselection rule. The target cell can be determined according to the above and uplink data transmission can be performed.

In combination with the second aspect or the above possible embodiment thereof, in the third possible embodiment of the second aspect, the method further raises the first base station via the first cell. The link synchronization information is transmitted, the uplink synchronization information is acquired from the target base station by the first base station, and the uplink synchronization information is transmitted by the target base station to the terminal in the second frequency band. It is confirmed in response to the uplink synchronization request transmitted to the base station, where the target base station is the base station to which the target cell belongs, and the target cell is confirmed by the terminal from the at least one second cell. Including being done.

The terminal can send an uplink synchronization request in the second frequency band indicated by the first instruction information, acquire the uplink synchronization information of the target cell and the terminal, and perform uplink synchronization with the target cell.

In the fourth possible embodiment of the second aspect, in combination with the second aspect or the above possible embodiment thereof, the method further comprises the first base station via the first cell. It includes transmitting the downlink synchronization information of the first cell to the terminal.

In the fifth possible embodiment of the second aspect, or in combination with the above possible embodiment thereof, the method further comprises the first base station via the first cell. At least one downlink synchronization offset information corresponding to the at least one second cell is transmitted to the terminal, and between the timing of the second cell corresponding to each downlink synchronization offset information and the timing of the first cell. Includes the amount of time offset of.

The terminal can acquire the downlink synchronization information of the first cell and the downlink synchronization information of the target cell from the first base station, and can perform downlink synchronization with the target cell.

In a third aspect, the invention provides a method for data transmission. The method is used for the second base station to transmit the system information of the second cell to the first base station, and the system information indicates the system parameters of the second cell. The carrier frequency corresponding to the cell belongs to the second frequency band, the first base station is the base station to which the first cell using the first frequency band belongs, and the second base station is the first. The correspondence between the second cell and the first cell is stored in advance, and the second base station transmits data to the terminal via the second cell.

In combination with the third aspect, in the first possible embodiment of the third aspect, the method further comprises an uplink synchronization request transmitted by the second base station from the terminal in the second frequency band. Is received, the uplink synchronization request is used to acquire the uplink synchronization information of the terminal and the second cell, and the second base station responds to the uplink synchronization request. This includes determining the link synchronization information and transmitting the uplink synchronization information to the first base station.

The second base station transmits the uplink synchronization information to the terminal by the uplink synchronization request transmitted from the terminal received in the second frequency band, and the second base station performs uplink synchronization with the terminal. Can be done.

In a fourth aspect, the invention provides a terminal for performing the method in any possible embodiment of the first aspect or the first aspect. Specifically, the terminal comprises a unit for performing the method in either the first aspect or the first possible embodiment.

In a fifth aspect, the invention provides a base station for performing the method in any possible embodiment of the second aspect or the second aspect. Specifically, the base station comprises a unit for performing the method in either the second aspect or the second possible embodiment.

In a sixth aspect, the invention further provides a base station for performing the method in any of the third or third possible embodiments. Specifically, the base station comprises a unit for performing the method in any of the third possible embodiments.

In a seventh aspect, the present invention provides a terminal. The terminal includes a transmitter / receiver, a processor, a memory and a bus system. Here, the transmitter / receiver, the memory and the processor are connected via a bus system, the memory is configured to store instructions, and the processor executes the instructions stored in the memory to receive and transmit signals. When the processor is configured to control a transmitter / receiver and the processor executes an instruction stored in the memory, the execution allows the processor to execute either a first aspect or a possible embodiment of the first aspect. Perform the method in.

In an eighth aspect, the present invention provides a base station. The base station includes a transmitter / receiver, memory, a processor and a bus system. Here, the transmitter / receiver, the memory and the processor are connected via a bus system, the memory is configured to store instructions, and the processor executes the instructions stored in the memory to receive and transmit signals. When the processor is configured to control a transmitter / receiver and the processor executes an instruction stored in the memory, the execution allows the processor to execute either a second aspect or a possible embodiment of the second aspect. Perform the method in.

In a ninth aspect, the present invention further provides a base station. The base station includes a transmitter / receiver, memory, a processor and a bus system. Here, the transmitter / receiver, the memory and the processor are connected via a bus system, the memory is configured to store instructions, and the processor executes the instructions stored in the memory to receive and transmit signals. When the processor is configured to control a transmitter / receiver and the processor executes an instruction stored in the memory, the execution allows the processor to execute either a third aspect or a possible embodiment of the third aspect. Perform the method in.

In a tenth aspect, the invention is a computer-readable storage medium used to store a computer program containing instructions for performing a method in any possible embodiment of the first aspect or the first aspect. I will provide a.

In an eleventh aspect, the invention is used to store a computer program containing instructions for performing a method in any possible embodiment of the second aspect or the second aspect. Provide a medium.

In a twelfth aspect, the invention is used to store a computer program containing instructions for performing a method in any of the third or third possible embodiments. Provide a medium.

In some embodiments, the paging information includes said second frequency band information and / or base station (ie, target base station) information to which the target cell belongs and / or said target cell information, said first. The base station is the base station to which the first cell belongs.

In some embodiments, the second frequency band information is at least one of frequency band information, bandwidth, threshold, and offset amount. The base station information to which the target cell belongs includes the target base station identifier ID. The target cell information includes at least one of a cell ID and a cell access technology.

In some embodiments, the system information of the second cell includes frequency band information of the second cell and / or base station information to which the second cell belongs and / or information of the second cell.

In some embodiments, the second frequency band information is at least one of frequency band information, bandwidth, threshold, and offset amount. The base station information to which the second cell belongs includes the second base station identifier ID. The second cell information includes at least one of the cell ID and the cell access technology.

In some embodiments, the uplink synchronization request information and transmission resources are determined by the target base station and transmitted to the transmitting side via the first base station, or the uplink synchronization request information is said. Requested to the target base station by the first base station, and transmitted to the terminal by the first base station after the target base station confirms the uplink synchronization request and allocates the transmission resource. .. Here, the uplink synchronization request information includes instruction information of the transmission resource.

Therefore, the present invention accesses the high frequency band cell as soon as possible or performs data transmission with the high frequency band cell when the terminal receives downlink control signaling in the low frequency band and needs to perform high speed data transmission. It provides methods, terminals and base stations for data transmission that can be performed and reduce the process and signaling overhead of high speed data services.

It is a figure which shows the application scene of the Example of this invention. It is a schematic flowchart of the method for data transmission by an Example of this invention. It is a schematic block diagram of the terminal according to the Example of this invention. It is a schematic block diagram of the base station according to the Example of this invention. It is a schematic block diagram of another base station according to the Example of this invention. It is another schematic block diagram of the terminal by the Example of this invention. It is another schematic block diagram of the base station according to the Example of this invention. It is another schematic block diagram of another base station according to the Example of this invention.

In order to more clearly explain the technical solution of the examples of the present invention, the drawings required for the examples of the present invention will be briefly described below, and clearly, the drawings described below are the number of the drawings of the present invention. It is only an embodiment of the above, and a person skilled in the art can obtain other drawings based on these drawings without requiring creative effort.

The technical solutions according to the examples of the present invention will be clearly and fully described by combining the drawings of the examples of the present invention below, and the examples clearly described are some of the examples of the present invention. Not all examples. All other examples obtained by those skilled in the art based on the examples of the present invention without the need for creative effort belong to the scope of protection of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention include various communication systems such as Global System for Mobile Communication (GSM) systems, Code Division Multiple Access (CDMA) systems. , Band Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE) A: It may be applied to an Advanced long Term Evolution) system, a universal mobile communication system (UMTS: Universal Mobile Telecommunication System), and the like.

Also, it should be understood that the user device (UE: User Equipment) is a mobile station (MS: Mobile Station), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (hanset), and a fixed station (Fixed). Station), fixed terminal (Fixed Computer), portable device (portable equipment), etc., but not limited to these, the user device is one or more core networks via a radio access network (RAN: Radio Access Network). The user device may be a mobile phone (or called a "cellular phone"), a computer having a radio communication function, or the like, and the user device may be a portable, pocket, handheld, computer, or the like. It may be a built-in, instrument built-in or in-vehicle mobile device.

FIG. 1 is a diagram showing an application scene of an embodiment of the present invention. FIG. 1 shows a high-low frequency hybrid network system, which includes a low-frequency base station 11, at least one high-frequency base station 12, and a terminal 13.

In the embodiment of the present invention, the frequency band of the low frequency base station 11 is lower than the frequency band of the high frequency base station 12. Here, the frequency band used for the low frequency base station 11 may be a low frequency band of less than 6 GHz, for example, 2 GHz or 5 GHz. The frequency band used for the high frequency base station 12 may be a high frequency band represented by the millimeter wave frequency band (that is, exceeding 6 GHz). For example, the frequency point used for the high frequency base station 12 is 72 GHz. , 28 GHz or 14 GHz.

Here, the low frequency base station 11 covers one wide range, and the high frequency base station 12 covers the hotspot within the coverage of the low frequency base station, increasing the capacity of the hotspot area. The terminal 13 is generally merely a low frequency transmitter / receiver, and is also provided with a high frequency transmitter / receiver. The low frequency transmitter / receiver is used for data communication with the low frequency base station 11, and the high frequency transmitter / receiver is higher. It is used for data communication with the frequency base station 12.

The terminal 13 stays in the low frequency cell and can receive the downlink control signaling transmitted from the low frequency base station 11, and the downlink control signaling is the downlink control signaling of the low frequency cell and the high frequency cell, for example. The terminal can simultaneously perform data transmission with the high frequency base station 12 based on the system information and paging information of the high frequency cell received from the low frequency base station 11 including system information and paging information.

It should be understood that the low and high frequencies are only for dividing the frequency band to which the carrier frequency corresponding to the cell belongs, and the carrier frequency corresponding to the low frequency cell belongs to the low frequency band and the high frequency cell. The carrier frequency corresponding to the above belongs to the high frequency band, the low frequency base station is the base station of the low frequency cell, and the high frequency base station is the base station of the high frequency cell. That is, the difference between the low frequency and the high frequency with respect to the base station is that the frequency band in which the carrier wave used for the base station is located is different. Therefore, the low frequency base station and the high frequency base station may be the same base station, and the low frequency cell receives and transmits data using the carrier frequency of the low frequency band, and the high frequency cell receives and transmits data in the high frequency band. Data can be received and transmitted using the carrier frequencies of, the low frequency base station and the high frequency base station may be different base stations, and the low frequency base station receives and transmits the carrier frequency of the low frequency band. The high frequency base station receives and transmits the carrier frequency in the high frequency band. The present invention is not particularly limited to this.

In the embodiments of the present invention, the low frequency base station is described as the first base station, the low frequency cell is described as the first cell, and the high frequency base station is described as the second base station for ease of classification and description. Can be described as a base station and a high frequency cell can be described as a second cell. Within the coverage of the first base station in the first cell, at least one second cell may be arranged, and each second cell may correspond to one serving base station, or a plurality. It is also possible for the second cell of the above to jointly use one serving base station (that is, the second base station).

It should be understood that "first" and "second" are merely to distinguish between low and high frequencies and should not impose any restrictions on the present invention. For example, a high frequency base station is described as a first base station, a high frequency cell is described as a first cell, a low frequency base station is described as a second base station, and a low frequency cell is described as a second cell. Can be described as. Also, it should be understood that the first base station and the second base station may be different base stations or may be the same base station.

In the embodiment of the present invention, the terminal receives the system information transmitted from each of the at least one second cell in the second frequency band after confirming that the data is transmitted in the second frequency band. can do. The terminal determines the cell for data transmission with the terminal from at least one second cell according to the cell selection or cell reselection rule. In order to facilitate classification and explanation, the cell determined by the terminal is described as a target cell, and the serving base station of the target cell is described as a target base station. It should be understood that both the target base station and the second base station may be high frequency base stations, and are the target base station and the second base station the base stations used for data transmission to and from the terminal? It is just for distinguishing whether or not. Target base stations are relative. For example, with respect to terminal A, base station A may be a target base station, and with respect to terminal B, base station B may be a target base station.

It should be understood that the target cell may jointly use one serving base station with another cell in at least one second cell, and the target cell may further use the first cell and one serving base station. (That is, the first base station) can be used jointly, and the target base station may be only the serving base station of the target cell, and the correspondence between the base station and the cell is particularly limited in the present invention. Not done.

It should be understood that in the embodiments of the present invention shown below, the first base station is the base station to which the first cell belongs, the second base station is the base station to which the second cell belongs, and so on. The target base station is a base station to which the target cell belongs, but is not limited to this, and the first base station, the second base station, and the target base station may be base stations to which other cells belong. In an embodiment of the invention, the first base station transmits information through the first cell, the second base station transmits information via the second cell, and the target base station is the target cell. Although only the transmission of information via is illustrated as an example, no limitation should be added to the configuration for the present invention. For example, the first base station may also transmit information via other cells to which it belongs, and the present invention is not particularly limited thereto.

In the following, in order to facilitate understanding and explanation, reference to FIG. 2, taking as an example that the first base station and the second base station are different base stations, data transmission according to an embodiment of the present invention will be performed. The method for this will be described in detail. It should be understood that if the first and second base stations exemplified here are different base stations, it is only an exemplary description and any limitation to the present invention should be added to the configuration. Instead, when the first base station and the second base station are the same base station, the method 200 can still be executed to realize data transmission between the terminal and the high frequency base station.

FIG. 2 is a schematic flowchart of a method 200 for data transmission according to an embodiment of the present invention. It should be understood that FIG. 2 shows data according to an embodiment of the present invention described in terms of interaction between a terminal, a low frequency base station (eg, first base station) and a high frequency base station (eg, target base station). Although detailed communication steps or actions of the method for transmission are shown, they are merely examples of these steps or actions, the embodiments of the present invention performing yet other actions or modifications of each action in FIG. Can be done. Further, each operation in FIG. 2 may be executed in a different order shown in FIG. 2, and it may not be necessary to execute all the operations in FIG.

It should be understood that the schematic flow chart of the terminal, the interaction between the first base station and the second base station shown in FIG. 2 is only a schematic description and any limitation to the present invention should be added to the configuration. Absent. In the embodiments of the present invention, a first base station (ie, an example of a low frequency base station) can have a correspondence with at least one high frequency base station (including, for example, a second base station), i.e. , The terminal staying in the low frequency cell can perform data transmission with the at least one high frequency base station.

As shown in FIG. 2, the method 200 includes the following steps.

In S202, when the terminal does not transmit data, the first instruction information is received in the first cell that uses the first frequency band.

Specifically, the fact that the terminal is in a non-data transmission state means that the terminal is idle or the context of the terminal is still maintained at the previous serving base station, but the terminal selects or reselects cells. It may be understood that movement management can be performed by rules. In other words, the mobility of the terminal is not directly controlled by the network.

Here, the previous serving base station may be the first base station in the embodiment of the present invention or may be another base station, and the present invention is not particularly limited thereto.

It should be explained that the first cell described here does not specifically refer to a specific cell, and the first cell is some cell among the cells that transmit the first instruction information. there is a possibility.

Specifically, the covered area is divided into several areas, one access point is set for each area to provide services to users within the range of this area, and this area is a cell. The definition of the cell may be applied to the conventional cell concept, may be one or a plurality of adjacent beams during beamforming, or may be one carrier wave in the area.

In the embodiment of the present invention, the first base station transmits the first instruction information via the first cell (or the first frequency band), and the first instruction information is the second frequency band. Instruct the terminal to transmit data with. The terminal that has received the first instruction information can transmit data in the second cell that uses the second frequency band based on the first instruction information.

As a matter of explanation, the second cell described here does not specifically refer to a specific cell, and the second cell is a cell that uses the second frequency band shown in the first instruction information. It may be some of our cells, and it may be the cell shown in the first instructional information. Specifically, the cell may be a conventional cell, one or a plurality of adjacent beams during beamforming, or one carrier wave in an area.

It should be understood that "first" and "second" are for distinction only and should not impose any restrictions on the invention. Also, it should be understood that the first base station is the base station to which the first cell belongs, or the first base station is the serving base station of the first cell and the second base station is the second. The base station to which the second cell belongs, or the second base station is the serving base station of the second cell. The first base station may correspond to one cell, that is, the first cell, may be a serving base station of a plurality of cells at the same time, and the second base station may correspond to one cell. Well, that is, the second cell may be a serving base station of a plurality of cells at the same time. The present invention is not particularly limited to this.

In the embodiment of the present invention, the first base station can cover one wide area as an example of a low frequency base station, and the second base station is an example of a high frequency base station. Hotspot coverage can be performed within the coverage of one base station. That is, there may be one or more second cells in the first cell. As the serving base station of the second cell, the correspondence between itself and the first base station may be stored in advance in each second base station. Alternatively, each high-frequency base station may store the correspondence between itself and the low-frequency base station in advance, and the coverage of the high-frequency base station is within the coverage of the low-frequency base station. Each high frequency base station can periodically transmit the system information or paging information of the high frequency cell serviced by the high frequency base station to the corresponding low frequency base station according to the correspondence.

In other words, the second base station within the coverage of the first base station has the above correspondence with the first base station and at least one second base within the coverage of the first base station. Each of the stations can transmit the system information or paging information of this cell to the first base station via the interface between the base stations. Specifically, the system information or paging information of the second cell may be periodically broadcasted, and the first base station is via the X2 interface or an interface having the same or similar function as the X2 interface. It can be obtained from the second base station via.

For example, base station A within the coverage of the first base station (ie, an example of the second base station) goes to cell A to the first base station via the interface between base station A and the first base station. Base station B (ie, another example of the second base station) can transmit system information or paging information of (ie, an example of the second cell) and is within the coverage of the first base station. The system information or paging information of cell B (that is, another example of the second cell) can be transmitted to the first base station via the interface between B and the first base station.

It should be understood that the above-mentioned X2 interface between base stations is merely an exemplary description and should not impose any limitation on the present invention, and the present invention is the same as or similar to the X2 interface. It does not exclude communication between base stations via an interface having the function of.

Also, it should be understood that the above-mentioned method for the second base station to transmit the system information or paging information of the second cell to the first base station via the interface between the base stations is the first. Is only one possible embodiment in which the base station of the above obtains system information or paging information, and no limitation should be added to the configuration for the present invention. For example, the system information and paging information of the second cell may be preset in the first base station, and are periodically broadcast in the first cell.

It should be explained that if the terminal is within the coverage of the first base station, the downlink synchronization signal of the first base station (simplifies classification and description) in the first cell (or first frequency band). Therefore, it is possible to perform downlink synchronization with the first cell by receiving the first downlink synchronization signal), and after performing downlink synchronization with the first cell, the first Stay in the cell. At this time, the terminal can receive the downlink control instruction (for example, system information, paging information, etc.) broadcast by the first base station. It should be understood that the method by which the terminal performs downlink synchronization with the first cell in the first frequency band is similar to the prior art, and for the sake of brevity, the description is omitted here or the first base. If the station is a serving base station in front of the terminal, the downlink control transmitted from the first base station in the first frequency band because the context of the terminal is still held by the first base station. Can receive commands.

Without losing generality, the first base station can broadcast the first instruction information in the first cell after determining the second frequency band. Instruct a terminal (including the above terminal) within the coverage of the first cell or a terminal that has received the first instruction information to perform data transmission with a second cell that uses the second frequency band. Used to do. It should be understood that there are multiple terminals within the coverage of the first cell, each terminal receiving the first instruction information broadcast in the first cell by the first base station. The target cell for each data transmission can be determined, and cell synchronization and data transmission can be performed with each target cell. The terminal described above does not particularly refer to a specific terminal, and the terminal may be a terminal in a cell that receives the first instruction information.

In S204, the terminal determines one or more second cells that use the second frequency band as target cells based on the first instruction information.

In the embodiment of the present invention, the at least one second cell includes the target cell, and the system information includes the system information of the target cell. When there is only one second cell in the coverage of the first base station, the terminal directly determines the second cell as the target cell based on the first instruction information, and the target cell And data transmission can be performed. If there are two or more second cells within the coverage of the first base station, the terminal is said to be in the second frequency band based on the second frequency band indicated in the first instruction information. It is possible to receive the system information transmitted by each of at least one second cell. The terminal can determine one or more second cells from at least one second cell as the target cell according to the cell selection or cell reselection rule. The method by which the terminal determines the target cell according to the cell selection or cell reelection rule may be realized by the prior art, and for the sake of brevity, here is a detailed description of the specific process by which the terminal determines the target cell. Omit.

It should be understood that the terminal may select one or more second cells as target cells in the second frequency band according to cell selection or cell reselection rules, and the number of target cells is particularly limited in the present invention. Not done.

In the embodiment of the present invention, the first instruction information broadcasted by the first base station may be paging information, or paging information and target cell arrangement information, or the first instruction. The information may be system information.

Selectably, the first instruction information is a paging message transmitted by the first base station via the first cell, or the paging information and the arrangement information of the target cell, and the first instruction information. Includes second frequency band information and / or base station (ie, target base station) information to which the target cell belongs and / or target cell information.

Here, the second frequency band information is at least one of the frequency band information, the bandwidth, the threshold value, and the offset amount. The base station information to which the target cell belongs includes a target base station identifier (Identifier: abbreviation of "ID"). The target cell information includes at least one of the cell ID and the cell access technology.

Selectably, in S204, it is determined that the terminal uses one or more second cells that use the second frequency band as the target cell based on the first instruction information.
The terminal determines the target cell based on the paging information, or
The terminal includes determining the target cell based on the paging information and the arrangement information of the target cell.

Specifically, the network side can transmit paging information to notify the terminal when it is necessary to transmit the downlink data to the terminal. For example, the paging information may be transmitted directly to the first base station by the core network, and the first base station generates the paging information transmitted in the first cell based on the paging information. Specifically, the first base station can generate the first instruction information based on the paging information, and the first instruction information is the base to which the second frequency band information and / or the target cell belongs. The first instruction information is transmitted in the first cell in the form of paging information, including station (ie, target base station) information and / or target cell information. Alternatively, the first base station adds the second frequency band information and / or the base station (ie, target base station) information to which the target cell belongs and / or the target cell information to the paging information transmitted in the first cell. .. The first base station transmits the paging information in the first cell, and when the terminal receives the paging information, the target cell is determined, and data transmission with the target cell is performed.

Further, after receiving the paging information transmitted from the core network, the first base station determines the target cell placement information according to the paging area, and based on the paging message and the target cell placement information, the first base station Instruction information can be generated. After receiving the first instruction information, the terminal can search the target cell within a smaller range based on the paging information and the arrangement information of the target cell, and can perform data transmission with the target cell. For example, the paging area shown in the paging information is the five second cells in the second frequency band, and the arrangement information of the target cell is the range of the target cell among the above five second cells. It is located in three second cells, which reduces the range in which the terminal searches for the target cell and can improve the efficiency with which the terminal determines the target cell.

Selectably, the first instruction information is the system information of the second cell transmitted by the first base station via the first cell, and the system information is the second frequency band information and / or Contains and / or second cell information of the base station (ie, second base station) to which the second cell belongs, and
In S202, when the terminal does not transmit data, receiving the first instruction information in the first cell using the first frequency band means
The terminal receives the system information of at least one second cell in the first cell using the first frequency band, and the system information of the at least one second cell is at least one second cell. Including one-to-one correspondence with cells
Here, the second frequency band information is at least one of the frequency band information, the bandwidth, the threshold value, and the offset amount. The base station information to which the second cell belongs includes the second base station identifier ID. The second cell information includes at least one of the cell ID and the cell access technology. What should be understood is the specificity of the second frequency band information, the base station information to which the cell (including the target cell and the second cell) belongs, and the cell (including the target cell and the second cell) information listed above. The content is merely an exemplary description, and no limitation should be added to the composition of the present invention, nor should the present invention be limited thereto.

Selectably, in S204, it is determined that the terminal uses one or more second cells that use the second frequency band as the target cell based on the first instruction information.
The terminal includes determining one or more second cells from the at least one second cell as target cells based on the system information of the at least one second cell.

Based on the system information of the at least one second cell, the terminal determines one or more second cells from the at least one second cell as a target cell according to a cell selection or cell reselection rule.

As an example, but not limited to, the access technology includes long-term evolution system (Long Term Evolution: abbreviated as "LTE") technology, wireless fidelity: abbreviated as "Wi-Fi"), general-purpose mobile communication service (Universal Mobile Telecommunications Services: Includes (abbreviated as "UMTS") technology or 5th generation mobile communication (5G) technology.

It should be understood that the access techniques listed above are merely exemplary description, and no limitation should be added to the configuration of the present invention, nor is the present invention limited thereto. The terminal can also communicate using other conventional access technologies or other future access technologies.

In S206, the terminal synchronizes the cell with the target cell.

Specifically, the method 200 further comprises performing data transmission in a second cell that uses the second frequency band when the terminal needs to perform data transmission based on the first instruction information.
This includes the terminal performing cell synchronization with the target cell based on the first instruction information.

The synchronization between the terminal and the target cell may be divided into downlink synchronization and uplink synchronization.

First, the terminal performs downlink synchronization with the target cell. In the embodiments of the present invention, the terminal is referred to as a downlink sync signal (referred to as a target downlink sync signal for ease of classification and description) that is periodically broadcast by the target base station directly in the second frequency band. ) Can be received to perform downlink synchronization with the target cell, and the downlink synchronization information of the target cell transmitted by the first base station in the first frequency band is received, and based on the downlink synchronization information. You can also perform downlink synchronization with the target cell. The specific process by which the terminal performs downlink synchronization with the target cell will be described in detail below.

In one embodiment, specifically, when the terminal performs downlink synchronization with the target cell,
Based on the first instruction information, the terminal receives at least one downlink synchronization signal transmitted by the at least one second base station in the second frequency band, and the at least one downlink synchronization is performed. That the signals have a one-to-one correspondence with the at least one second base station and that each downlink sync signal is from the corresponding second base station.
The terminal determines the downlink signal of the target cell from the at least one downlink synchronization signal.
The terminal includes performing downlink synchronization with the target cell based on the downlink synchronization signal of the target cell.

Specifically, each second base station (including the target base station) has a downlink synchronization signal of each second cell in the second frequency band, for example, a primary synchronization signal (Primary Synchronization Signal: "PSS". (Abbreviation) and a secondary synchronization signal (Seconday Synchronization Signal: abbreviated as "SSS") can be broadcast periodically.

If there is only one second cell in the second frequency band, the second cell is the target cell of the terminal. The terminal completes the frame synchronization after receiving the PSS and SSS broadcasted by the base station of the second cell (ie, the second base station or the target base station) in the second frequency band. And, the cell identifier of the cell (that is, the target cell) corresponding to the downlink synchronization signal is acquired. This completes the downlink synchronization between the terminal and the target cell.

If there may be more than one second cell in the second frequency band, the base station in each second cell will have its own downlink sync signal (for ease of classification and description, a second (Described as a downlink synchronization signal) is broadcast periodically. Here, the second downlink synchronization signal includes the downlink synchronization signal of the target cell. When the terminal receives the second downlink synchronization signal of a plurality of second cells in the second frequency band, the cell of the second cell corresponding to the second downlink synchronization signal of each second cell The downlink synchronization signal of the target cell is determined based on the identifier and the cell identifier of the target cell shown in the first instruction information or the cell identifier of the target cell determined according to the cell selection or cell reselection rule by the terminal, and the target cell is determined. Downlink synchronization with can be completed.

In another embodiment, specifically, when the terminal performs downlink synchronization with the target cell,
When the terminal receives the downlink synchronization information of the first cell in the first cell,
When the terminal confirms the downlink synchronization information of the target cell,
The terminal includes performing downlink synchronization with the target cell based on the downlink synchronization information of the target cell.

Here, the terminal determines the downlink synchronization information of the target cell.
The terminal receives at least one downlink synchronization offset information corresponding to the at least one second cell transmitted by the first base station via the first cell, and each downlink synchronization offset information. Includes the amount of offset between the timing of the corresponding second cell and the timing of the first cell.
The terminal includes determining the downlink synchronization information of the target cell based on the downlink synchronization offset information of the at least one second cell.

Specifically, the terminal can receive the downlink synchronization information of the first cell from the first base station, and the downlink synchronization information of the first cell is the timing between the terminal and the first cell. Indicates the amount of time offset of. The terminal can further determine the downlink synchronization information of the target cell, and the downlink synchronization information of the target cell indicates the amount of time offset of the timing between the first cell and the target cell.

The terminal can determine the downlink synchronization information of the target cell based on the time offset amount between the base stations stored in advance. For example, the terminal knows that the time offset amount between the base stations is 2 ms. ..

The terminal can also determine the downlink synchronization information of the target cell based on the downlink synchronization information of the second cell transmitted by the first base station. Specifically, the first base station transmits at least one downlink synchronization information corresponding to at least one second cell to the terminal, and each downlink synchronization information corresponds to the second cell and the first. Includes the amount of timing time offset between cells. The terminal can determine the time offset amount of the target cell based on the cell information of the confirmed target cell.

The terminal can further perform uplink synchronization with the target cell after the downlink synchronization with the target cell is completed.

Selectably, when the terminal performs uplink synchronization with the target cell, specifically
The terminal is used to send an uplink synchronization request to a target base station to which the target cell belongs in the second frequency band, and the uplink synchronization request acquires uplink synchronization information of the terminal and the target cell. To be done
The terminal receives the uplink synchronization information in the first cell, the uplink synchronization information is acquired from the target base station by the first base station, and the uplink synchronization information is obtained by the target base station. It is confirmed in response to the uplink synchronization request, and the uplink synchronization information indicates the amount of time offset of the timing between the terminal and the base station.
The terminal includes performing uplink synchronization with the target cell based on the uplink synchronization information.

Here, the uplink synchronization request information and the transmission resource (for example, the time frequency resource) are determined by the target base station and transmitted to the terminal via the first base station, or
The uplink synchronization request information is requested to the target base station by the first base station, and after the target base station confirms the uplink synchronization request and allocates the resource, the first base station Is sent to the terminal.

Here, the uplink synchronization request information includes instruction information of the transmission resource.

Specifically, the terminal needs to know the time frequency resource for transmitting the uplink synchronization request before transmitting the uplink synchronization request to the target base station in the second frequency band. The time frequency resource may be requested to the target base station by the first base station, specifically, after being determined by the first base station, requested by the target base station and designated by the target base station. After that, the first base station transmits the instruction information of the time frequency resource to the terminal. The time frequency resource is determined directly by the target base station, and instruction information can also be transmitted to the terminal by the first base station. After receiving the instruction information of the time frequency resource, the terminal can send an uplink synchronization request to the target base station with the specified time frequency resource, or the terminal can send the target base station in the second frequency band. Random Access (abbreviated as "RA") request is sent to. Here, the uplink synchronization request can include a random access play. After receiving the uplink synchronization request, the target base station can determine the uplink synchronization information in response to the received uplink synchronization request. Here, when the uplink synchronization request indicates the timing of the terminal, the uplink synchronization information indicates the time offset amount of the timing between the terminal and the target base station. Optionally, the time offset amount may be an uplink transmission time advance amount (Time Alignment: abbreviated as "TA"). After receiving the uplink synchronization information, the terminal can adjust the uplink transmission time based on the timing offset amount to complete the uplink synchronization with the target cell, or the terminal can upload to the target cell. Link synchronization can be completed.

In an embodiment of the present invention, the uplink synchronization information transmitted from the target base station to the terminal may be transferred via the first base station, that is, the terminal is the first base station in the first frequency band. The uplink synchronization information of the target cell transmitted from is received, and the uplink synchronization information of the target cell is acquired from the target base station by the first base station.

As a result, the terminal completes the uplink and downlink synchronization with the target cell. In an embodiment of the invention, low frequency cells (eg, first) when not transmitting data to reduce the high power consumption that can be caused by receiving downlink control signaling after the terminal stays in the target cell. Keeps in sync with the cell) and the target cell, receives the downlink control signaling of the target cell in the low frequency cell, and controls the terminal to perform data transmission with the target base station when data needs to be transmitted. can do.

In S208, when transmitting data, the terminal uses the second frequency band to perform data transmission with the target cell.

Specifically, the terminal performs data transmission including uplink data transmission and downlink data transmission.

When the terminal needs to perform uplink data transmission, the data can be directly transmitted to the target cell based on the received system information of the target cell. When the network side needs to send downlink data to a terminal, it is possible to first send paging information so that the terminal can access the target cell based on the paging information or perform data transmission with the target cell. it can.

When it is necessary to perform uplink data transmission, the first instruction information is the system information of each second cell. The first base station can acquire the system information of the second cell from the serving base station (that is, the second base station) of each second cell, and stores the system information of each second cell in advance. You can also do it. The first base station can periodically broadcast the system information of each second cell, and the terminal can periodically broadcast the system information of each second cell received and the cell identifier of the target cell determined in itself. Based on the above, the system information of the target cell can be determined, and data transmission can be performed with the target base station based on the system information of the target cell.

When it is necessary to perform downlink data transmission, the first instruction information includes paging information or paging information and target cell placement information. The terminal can directly determine the target cell based on the first instruction information and perform data transmission with the target base station.

Therefore, in the method for data transmission according to the embodiment of the present invention, when the terminal needs to perform data transmission by completing the synchronization with the target cell in advance in the first frequency band, the data transmission is performed in the target cell. It is necessary to perform data transmission by avoiding the high power consumption that can be caused by the terminal staying in the high frequency band and receiving the downlink control signaling, and at the same time completing the synchronization with the target cell in advance. At some point, the high frequency band cell or target cell can be accessed and data transmitted as quickly as possible, significantly reducing the cell access process in the prior art and reducing the signaling overhead as compared to the prior art.

The method for data transmission according to the embodiment of the present invention has been described in detail with reference to FIG. The apparatus for data transmission according to the embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 5.

FIG. 3 is a schematic block diagram of the terminal 300 according to the embodiment of the present invention. As shown in FIG. 3, the terminal 300 is
When no data is transmitted, the first cell using the first frequency band is configured to receive the first instruction information, and the first instruction information is the second when the data needs to be transmitted. A transmission / reception unit 310 used for instructing a terminal that has received the first instruction information to transmit data using the frequency band of
The transmission / reception unit 310 is further configured to perform data transmission in a second cell that uses the second frequency band when it is necessary to perform data transmission based on the first instruction information.

Selectable, the terminal 300 further
A determination unit configured to determine one or more second cells using the second frequency band as target cells based on the first instruction information.
A processing unit configured to perform cell synchronization with the target cell is provided.
Specifically, the transmission / reception unit 310 is configured to perform data transmission with the target cell using the second frequency band when it is necessary to perform data transmission.

Selectably, the first instruction information is paging information transmitted by the first base station via the first cell, or the paging information and the arrangement information of the target cell, and the first instruction information is The first base station includes the second frequency band information and / or the base station information to which the target cell belongs and / or the target cell information, and the first base station is the base station to which the first cell belongs.
The determination unit is specifically configured to determine the target cell based on paging information, or
Specifically, the determination unit is configured to determine the target cell based on the paging information and the arrangement information of the target cell.

Selectably, the first instruction information is the system information of the second cell transmitted by the first base station via the first cell, and the system information of the second cell is the second cell. The first base station includes the frequency band information of the cell and / or the base station information to which the second cell belongs and / or the second cell information, and the first base station is the base station to which the first cell belongs.
Specifically, the transmission / reception unit 310 is configured to receive the system information of at least one second cell in the first cell using the first frequency band, and the at least one second cell. System information has a one-to-one correspondence with at least one second cell,
Specifically, the determination unit is configured to determine one or more second cells as the target cell from the at least one second cell based on the system information of the at least one second cell. Will be done.

Optionally, the transmit / receive unit 310 is further configured to transmit an uplink synchronization request to the target base station to which the target cell belongs in the second frequency band, and the uplink synchronization request is made to the terminal and the terminal. Used to get the uplink sync information for the target cell
The transmission / reception unit 310 is further configured to receive uplink synchronization information in the first cell, and the uplink synchronization information is acquired from the target base station by the first base station, and the uplink synchronization is performed. The information is confirmed by the target base station in response to the uplink synchronization request, and the first base station is the base station to which the first cell belongs.
Specifically, the processing unit is configured to perform uplink synchronization with the target cell based on the uplink synchronization information.

Selectably, the transmit / receive unit 310 is further configured to receive the downlink synchronization information of the first cell in the first cell.
The confirmation unit is further configured to confirm the downlink synchronization information of the target cell.
The processing unit is specifically configured to perform downlink synchronization with the target cell based on the downlink synchronization information of the target cell.

Optionally, the transmit / receive unit 310 further provides at least one downlink synchronization offset information corresponding to the at least one second cell transmitted through the first cell by the first base station. Configured to receive, each downlink synchronization offset information includes a time offset amount between the timing of the corresponding second cell and the timing of the first cell, and the first base station is said to be the first. The base station to which the cell belongs,
The determination unit is specifically configured to determine the downlink synchronization information of the target cell based on the downlink synchronization offset information of the at least one second cell.

The terminal 300 according to the embodiment of the present invention can correspond to the terminal in the method for data transmission according to the embodiment of the present invention, and each unit in the terminal 300 and the other operation and / or function described above are respectively. It is used to carry out the corresponding process of the method in FIG. 2 and is omitted herein for brevity.

Therefore, in the terminal according to the embodiment of the present invention, by completing the synchronization with the target cell in advance in the first frequency band, when it is necessary to perform data transmission, data transmission is performed with the target cell, and the terminal has a high frequency. With the target cell when it is necessary to perform data transmission by avoiding the high power consumption that can be caused by staying in the band and receiving the downlink control signaling, and at the same time pre-complete synchronization with the target cell. Data can be transmitted, which significantly reduces the cell access process in the prior art and reduces the signaling overhead compared to the prior art.

FIG. 4 is a schematic block diagram of the base station 400 according to the embodiment of the present invention. As shown in FIG. 4, the base station 400 is
A terminal that is configured to determine the first instruction information and has received the first instruction information so that the first instruction information transmits data in a second cell that uses the second frequency band. The confirmation unit 410, to which the base station belongs to the first cell that uses the first frequency band, is used to instruct
A transmission / reception unit 420 configured to transmit the first instruction information via the first cell is provided.

Selectably, the first instruction information is paging information, or the paging information and target cell arrangement information, and the first instruction information is the second frequency band information and / or target base station information and /. Alternatively, the target cell information is included, the second cell includes the target cell, and the target base station is the base station to which the target cell belongs.
The transmission / reception unit 420 is specifically configured to transmit the paging information via the first cell, or.
Specifically, the transmission / reception unit 420 is configured to transmit the paging information and the arrangement information of the target cell via the first cell.

Selectably, the first instruction information is the system information of the second cell, and the system information of the second cell is the frequency band information of the second cell and / or the system information of the second cell belongs to. Includes base station information and / or said second cell information
The transmission / reception unit 410 is further configured to receive the system information of at least one second cell transmitted by at least one second base station, and the system information of the at least one second cell is the at least. One-to-one correspondence with one second cell,
The transmission / reception unit 420 is specifically configured to transmit the system information of the at least one second cell via the first cell.

Selectably, the transmit / receive unit 420 is further configured to transmit uplink synchronization information via the first cell, the uplink synchronization information being acquired from the target base station by the base station, and the uplink synchronization information. The link synchronization information is determined by the target base station in response to the uplink synchronization request transmitted by the terminal to the target base station in the second frequency band, where the target base station is the base to which the target cell belongs. It is a station and the target cell is determined by the terminal from the at least one second cell.

Optionally, the transmit / receive unit 420 is further configured to transmit downlink synchronization information of the first cell to the terminal via the first cell.

Optionally, the transmit / receive unit 420 is further configured to transmit at least one downlink synchronization offset information corresponding to the at least one second cell to the terminal via the first cell, each down. The link synchronization offset information includes the amount of time offset between the timing of the corresponding second cell and the timing of the first cell.

The base station 400 according to the embodiment of the present invention can correspond to the first base station in the method for data transmission according to the embodiment of the present invention, and each unit in the base station 400 and the other operations described above. And / or functions are used to carry out the corresponding processes of the method in FIG. 2, respectively, and are omitted herein for brevity.

Therefore, in the base station according to the embodiment of the present invention, by transmitting the downlink control signaling to the terminal in the first frequency band, the terminal completes the synchronization with the target cell in advance in the first frequency band and data transmission. The terminal can perform data transmission with the target cell when it needs to, avoiding the high power consumption that can be caused by the terminal staying in the high frequency band and receiving downlink control signaling, and at the same time. By completing the synchronization with the target cell in advance, it is possible to perform data transmission with the target cell when data transmission needs to be performed, and the cell access process in the conventional technology is significantly reduced as compared with the conventional technology. Reduce signaling overhead.

FIG. 5 is a schematic block diagram of another base station 500 according to an embodiment of the present invention. As shown in FIG. 5, the base station 500 is
It is configured to transmit the system information of the second cell to the first base station, the system information is used to indicate the system parameters of the second cell, and the carrier frequency corresponding to the second cell. Is a base station to which the first cell belongs to which belongs to the second frequency band and the first base station uses the first frequency band, and the second cell and the first cell are included in the base station. It is equipped with a transmission / reception unit 510 in which the correspondence with the above is stored in advance.
The transmission / reception unit 510 is further configured to transmit data with the terminal via the second cell.

Optionally, the transmit / receive unit 510 is further configured to receive an uplink synchronization request transmitted from the terminal in the second frequency band, the uplink synchronization request being of the terminal and the second cell. Used to get uplink sync information
The transmission / reception unit 510 is further configured to determine the uplink synchronization information in response to the uplink synchronization request and transmit the uplink synchronization information to the first base station.

The base station 500 according to the embodiment of the present invention can correspond to the second base station in the method for data transmission according to the embodiment of the present invention, and each unit in the base station 500 and the other operations described above. And / or functions are used to carry out the corresponding processes of the method in FIG. 2, respectively, and description is omitted herein for brevity.

Therefore, in the base station according to the embodiment of the present invention, by completing the synchronization between the terminal in the first cell and the target cell in advance, when it is necessary to perform data transmission, data transmission is performed with the terminal and the terminal. When it is necessary to perform data transmission by staying in the high frequency band and avoiding the high power consumption that can be caused by receiving downlink control signaling, while at the same time pre-complete synchronization with the target cell. Data can be transmitted with the target cell, which significantly reduces the cell access process in the prior art and reduces the signaling overhead compared to the prior art.

The apparatus for data transmission according to the embodiment of the present invention has been described above with reference to FIGS. 3 to 5. The apparatus for data transmission according to the embodiment of the present invention will be described in detail below with reference to FIGS. 6-8.

FIG. 6 is a schematic block diagram of the terminal 600 according to the embodiment of the present invention. As shown in FIG. 6, the terminal 300 includes a transmitter / receiver 610, a processor 620, a memory 630, and a bus system 640. Here, the processor 620, the memory 630, and the transmitter / receiver 610 are connected via the bus system 640, the memory 630 is configured to store instructions, and the processor 620 executes the instructions stored in the memory 630. , The transmitter / receiver 610 is configured to receive and transmit signals.

Here, the transmitter / receiver 610 is configured to receive the first instruction information in the first cell that uses the first frequency band when the data is not transmitted, and the first instruction information transmits the data. It is used to instruct the receiving terminal to transmit the data using the second frequency band when it needs to be transmitted.
The transmitter / receiver 610 is further configured to perform data transmission in a second cell that uses a second frequency band when it is necessary to perform data transmission based on the first instruction information.

As should be understood, in the embodiments of the present invention, the processor 620 may be a central processing unit (abbreviated as "CPU"), and the processor 620 may be another general purpose processor, a digital signal processor (DSP). ), Dedicated integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and the like. The general purpose processor may be a microprocessor, or the processor may be any conventional processor or the like.

The memory 630 includes a read-only memory and a random access memory, and can provide instructions and data to the processor 620. A portion of the memory 630 may further include a non-volatile random access memory. For example, the memory 630 can further store device type information.

The bus system 640 can include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. For clarity, various bus buses are designated as bus system 640 in the figure.

In the implementation process, each step of the method may be completed by a hardware integrated logic circuit or software form instruction in the processor 620. The steps for switching between supercells, disclosed in combination with the embodiments of the present invention, are performed and completed by a hardware processor or by a combination of hardware and software modules in the processor. It may be embodied directly as follows. Software modules may be located in mature storage media in the art such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers. The storage medium is located in memory 630, and processor 620 executes the information in memory 630 and, in combination with its hardware, completes the steps of the above method. A detailed description is omitted here to avoid repetition.

Selectably, the processor 620 is configured to determine one or more second cells using the second frequency band as target cells based on the first instruction information.
The processor 620 is further configured to perform cell synchronization with the target cell.
The transmitter / receiver 610 is configured to perform data transmission with the target cell using the second frequency band when it is specifically necessary to perform data transmission.

Selectably, the first instruction information is paging information transmitted by the first base station via the first cell, or the paging information and the arrangement information of the target cell, and the first instruction information is The first base station includes the second frequency band information and / or the base station information to which the target cell belongs and / or the target cell information, and the first base station is the base station to which the first cell belongs.
The processor 620 is specifically configured to determine the target cell based on the paging information, or
The processor 620 is specifically configured to determine the target cell based on the paging information and the placement information of the target cell.

Selectably, the first instruction information is the system information of the second cell transmitted by the first base station through the first cell, and the system information of the second cell is the second cell. The first base station includes the frequency band information and / or the base station information to which the second cell belongs and / or the second cell information, and the first base station is the base station to which the first cell belongs.
The transmitter / receiver 610 is specifically configured to receive the system information of at least one second cell in the first cell using the first frequency band, and of the at least one second cell. System information has a one-to-one correspondence with at least one second cell,
The processor 620 is specifically configured to determine one or more second cells from the at least one second cell as the target cell, based on the system information of the at least one second cell. To.

Selectably, the transmitter / receiver 610 is further configured to transmit an uplink synchronization request to the target base station to which the target cell belongs in the second frequency band, and the uplink synchronization request is made to the terminal and the target. Used to get cell uplink sync information,
The transmitter / receiver 610 is further configured to receive uplink synchronization information in the first cell, and the uplink synchronization information is acquired from the target base station by the first base station, and the uplink synchronization information is obtained. Is determined by the target base station in response to the uplink synchronization request, and the first base station is the base station to which the first cell belongs.
The processor 620 is specifically configured to perform uplink synchronization with the target cell based on the uplink synchronization information.

Selectably, the transmitter / receiver 610 is further configured to receive the downlink synchronization information of the first cell in the first cell.
The processor 620 is further configured to determine the downlink synchronization information of the target cell.
The processor 620 is specifically configured to perform downlink synchronization with the target cell based on the downlink synchronization information of the target cell.

Optionally, the transmitter / receiver 610 further receives at least one downlink synchronization offset information corresponding to the at least one second cell transmitted through the first cell by the first base station. Each downlink synchronization offset information includes a time offset amount between the timing of the corresponding second cell and the timing of the first cell, and the first base station is the first cell. Is the base station to which
The processor 620 is specifically configured to determine the downlink synchronization information of the target cell based on the downlink synchronization offset information of the at least one second cell.

The terminal 600 according to the embodiment of the present invention can correspond to the terminal in the method for data transmission in the embodiment of the present invention, and each module in the terminal 600 and the other operation and / or function described above are respectively. It is used to carry out the corresponding process of the method in FIG. 2 and is omitted herein for brevity.

Therefore, in the terminal according to the embodiment of the present invention, by completing the synchronization with the target cell in advance in the first frequency band, when it is necessary to perform data transmission, data transmission is performed with the target cell, and the terminal has a high frequency. With the target cell when it is necessary to perform data transmission by avoiding the high power consumption that can be caused by staying in the band and receiving the downlink control signaling, and at the same time pre-complete synchronization with the target cell. Data can be transmitted, which significantly reduces the cell access process in the prior art and reduces the signaling overhead compared to the prior art.

FIG. 7 is a schematic block of a base station 700 according to an embodiment of the present invention. As shown in FIG. 7, the base station 700 includes a transmitter / receiver 710, a processor 720, a memory 730, and a bus system 740. Here, the processor 720, the memory 730, and the transmitter / receiver 710 are connected via the bus system 740, the memory 730 is configured to store instructions, and the processor 720 executes the instructions stored in the memory 730. , The transmitter / receiver 710 is configured to receive and transmit signals.

Here, the processor 720 is configured to determine the first instruction information so that the first instruction information transmits data in a second cell that uses the second frequency band. It is used to instruct the terminal that received the instruction information of the above, and the base station is the base station to which the first cell that uses the first frequency band belongs.
The transmitter / receiver 710 is configured to transmit the first instruction information via the first cell.

Selectably, the first instruction information is paging information, or the paging information and target cell arrangement information, and the first instruction information is the second frequency band information and / or target base station information and /. Alternatively, the target cell information is included, the second cell includes the target cell, and the target base station is the base station to which the target cell belongs.
The transmitter / receiver 710 is specifically configured to transmit the paging information via the first cell, or.
Specifically, the transmitter / receiver 710 is configured to transmit the paging information and the arrangement information of the target cell via the first cell.

Selectably, the first instruction information is the system information of the second cell, and the system information of the second cell is the frequency band information of the second cell and / or the system information of the second cell belongs to. Includes base station information and / or said second cell information
The transmitter / receiver 710 is further configured to receive system information of at least one second cell transmitted by at least one second base station, and the system information of at least one second cell is at least said. One-to-one correspondence with one second cell,
The transmitter / receiver 710 is specifically configured to transmit system information of the at least one second cell via the first cell.

Selectably, the transmitter / receiver 710 is further configured to transmit uplink synchronization information via the first cell, the uplink synchronization information being acquired from the target base station by the base station, and the uplink synchronization information. The link synchronization information is determined by the target base station in response to the uplink synchronization request transmitted by the terminal to the target base station in the second frequency band, where the target base station is the base to which the target cell belongs. It is a station and the target cell is determined by the terminal from the at least one second cell.

Optionally, the transmitter / receiver 710 is further configured to transmit downlink synchronization information of the first cell to the terminal via the first cell.

Optionally, the transmitter / receiver 710 is further configured to transmit at least one downlink synchronization offset information corresponding to the at least one second cell to the terminal via the first cell, each down. The link synchronization offset information includes the amount of time offset between the timing of the corresponding second cell and the timing of the first cell.

The base station 700 according to the embodiment of the present invention can correspond to the first base station in the method for data transmission according to the embodiment of the present invention, and each module in the base station 700 and the other operations described above. And / or functions are used to carry out the corresponding processes of the method in FIG. 2, respectively, and are omitted herein for brevity.

Therefore, in the base station according to the embodiment of the present invention, by transmitting the downlink control signaling to the terminal in the first frequency band, the terminal completes the synchronization with the target cell in advance in the first frequency band and data transmission. The terminal can perform data transmission with the target cell when it needs to, avoiding the high power consumption that can be caused by the terminal staying in the high frequency band and receiving downlink control signaling, and at the same time. By completing the synchronization with the target cell in advance, it is possible to perform data transmission with the target cell when data transmission needs to be performed, and the cell access process in the conventional technology is significantly reduced as compared with the conventional technology. Reduce signaling overhead.

FIG. 8 is a schematic block diagram of another base station 800 according to an embodiment of the present invention. As shown in FIG. 8, the base station 800 includes a transmitter / receiver 810, a processor 820, a memory 830, and a bus system 840. Here, the processor 820, the memory 830, and the transmitter / receiver 810 are connected via the bus system 840, the memory 830 is configured to store instructions, and the processor 820 executes the instructions stored in the memory 830. , It is configured to control the transmitter / receiver 810 to receive and transmit signals.

Here, the transmitter / receiver 810 is configured to transmit the system information of the second cell to the first base station, and the system information is used to indicate the system parameters of the second cell. The carrier frequency corresponding to the second cell belongs to the second frequency band, the first base station is the base station to which the first cell using the first frequency band belongs, and the second base station has the second. The correspondence between the cell and the first cell is stored in advance.
The transmitter / receiver 810 is further configured to transmit data to the terminal via the second cell.
Optionally, the transmit / receive unit 810 is further configured to receive an uplink synchronization request transmitted from the terminal in the second frequency band, the uplink synchronization request of the terminal and the second cell. Used to get uplink sync information
The transmitter / receiver 810 is further configured to determine the uplink synchronization information in response to the uplink synchronization request and transmit the uplink synchronization information to the first base station.

The base station 800 according to the embodiment of the present invention can correspond to the second base station in the method for data transmission according to the embodiment of the present invention, and each module in the base station 800 and the other operations described above. And / or functions are used to carry out the corresponding processes of the method in FIG. 2, respectively, and description is omitted herein for brevity.

Therefore, in the base station according to the embodiment of the present invention, by completing the synchronization between the terminal in the first cell and the target cell in advance, when it is necessary to perform data transmission, data transmission is performed with the terminal and the terminal. When it is necessary to perform data transmission by staying in the high frequency band and avoiding the high power consumption that can be caused by receiving downlink control signaling, while at the same time pre-complete synchronization with the target cell. Data can be transmitted with the target cell, which significantly reduces the cell access process in the prior art and reduces the signaling overhead compared to the prior art.

As it should be understood, the term "and / or" is used herein only to describe the relationships of related objects, indicating that there may be three types of relationships, eg, A. And / or B can indicate three situations: A is present alone, A and B are present at the same time, and B is present alone. Further, in the present specification, the character "/" generally indicates that the related objects before and after the relationship are "or".

It should be understood that in the examples of each method of the present invention, the size of the numbers of each of the above processes does not mean the execution order, and the execution order of each process should be determined by its function and internal logic. No limitation of the implementation process of the embodiments of the present invention should be added to the configuration.

Those skilled in the art may implement the units and algorithm steps of each example described in combination with the embodiments disclosed herein in electronic hardware, or in combination with computer software and electronic hardware. Can be understood. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional engineers may achieve the functionality described using different methods for each particular application, but such realization should not be considered beyond the scope of the present invention.

Those skilled in the art can refer to the corresponding processes in the embodiments of the above methods for the specific operating processes of the systems, devices and units described above for convenience and concise description, and clearly understand that the description is omitted here. can do.

It should be understood that in some of the examples provided by this application, the disclosed systems, devices and methods may be implemented in other ways. For example, the above-mentioned embodiment of the device is merely an example. For example, the division of the unit is only a logic functional division, and there may be other division methods when actually implementing the device. For example, multiple units or members may be combined or integrated into other systems, or some features may be ignored or may not be implemented. Also, the interconnected or direct coupled or communication connection shown or discussed may be an indirect coupling or communication connection via some interface, device or unit, and may be of any electrical, mechanical or other form. You may.

The unit described as a separating member may or may not be physically separated, and the member labeled as a unit may be a physical unit. Alternatively, it may not be a physical unit, that is, it may be located in one place, or it may be distributed in a plurality of network units. Some or all of the units can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, individual units may physically exist independently, and two or more units may be one. It may be integrated into a unit.

When the function is realized in the form of a software function unit and sold or used as an independent product, it may be stored in one computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be realized essentially in the form of a software product, or a portion that contributes to the prior art or a portion of the technical solution is in the form of a software product. It may be realized and the computer software product performs all or part of the steps of the methods described in each embodiment of the present invention in one computer device (which may be a personal computer, server, network device, etc.). It is stored in a storage medium that contains several instructions for making it. The storage medium includes various media capable of storing a program code such as a U disk, a mobile hard disk, a read-only memory (ROM: Read-Only Memory), a random access memory (RAM: Random Access Memory), a magnetic disk, or an optical disk.

The above is merely a specific embodiment of the present invention, the scope of protection of the present invention is not limited thereto, and any changes or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention are all possible. It should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be governed by the claims.

Claims (15)

It ’s a terminal,
When the data is not transmitted, the first cell using the first frequency band is configured to receive the first instruction information, and the first instruction information is the second when the data needs to be transmitted. A transmission / reception unit used for instructing a terminal that has received the first instruction information to transmit data using the frequency band of
The terminal, wherein the transmission / reception unit is configured to perform data transmission in a second cell that uses a second frequency band when it is necessary to perform data transmission based on the first instruction information. The terminal further
A determination unit configured to determine one or more second cells using the second frequency band as target cells based on the first instruction information.
A processing unit configured to perform cell synchronization with the target cell is provided.
The first aspect of the present invention is characterized in that the transmission / reception unit is specifically configured to perform data transmission with the target cell using the second frequency band when it is necessary to perform data transmission. Terminal. The first instruction information is paging information transmitted by the first base station via the first cell, or the paging information and target cell arrangement information, and the first instruction information is the second. The first base station includes the frequency band information and / or the base station information to which the target cell belongs and / or the target cell information, and the first base station is the base station to which the first cell belongs.
The determination unit is specifically configured to determine the target cell based on the paging information, or
The terminal according to claim 2, wherein the determination unit is specifically configured to determine the target cell based on the paging information and the arrangement information of the target cell. The first instruction information is system information of the second cell transmitted by the first base station via the first cell, and the system information of the second cell is the frequency of the second cell. The first base station includes band information and / or base station information to which the second cell belongs and / or the second cell information, and the first base station is a base station to which the first cell belongs.
Specifically, the transmission / reception unit is configured to receive the system information of at least one second cell in the first cell using the first frequency band, and the transmission / reception unit of the at least one second cell. System information has a one-to-one correspondence with at least one second cell,
The determination unit is specifically configured to determine one or more second cells from the at least one second cell as the target cell based on the system information of the at least one second cell. 2. The terminal according to claim 2. The transmission / reception unit is further configured to transmit an uplink synchronization request to a target base station to which the target cell belongs in the second frequency band, and the uplink synchronization request is an uplink synchronization between the terminal and the target cell. Used to get information
The transmission / reception unit is further configured to receive the uplink synchronization information in the first cell, the uplink synchronization information is acquired from the target base station by the first base station, and the uplink synchronization information is obtained. Determined by the target base station in response to the uplink synchronization request, the first base station is the base station to which the first cell belongs.
The terminal according to any one of claims 2-4, wherein the processing unit is specifically configured to perform uplink synchronization with the target cell based on the uplink synchronization information. Uplink synchronization request information and transmission resources are determined by the target base station and transmitted to the transmitting side via the first base station, or
The uplink synchronization request information is requested to the target base station by the first base station, and after the target base station confirms the uplink synchronization request and allocates the transmission resource, the first base Sent by the station to the terminal
The method according to claim 5, wherein the uplink synchronization request information includes instruction information of the transmission resource. The transmission / reception unit is further configured to receive the downlink synchronization information of the first cell in the first cell.
The confirmation unit is further configured to confirm the downlink synchronization information of the target cell.
The processing unit according to any one of claims 2-4, wherein the processing unit is specifically configured to perform downlink synchronization with the target cell based on the downlink synchronization information of the target cell. Terminal. The transmission / reception unit is further configured to receive at least one downlink synchronization offset information corresponding to the at least one second cell transmitted by the first base station via the first cell. , Each downlink synchronization offset information includes a time offset amount between the timing of the corresponding second cell and the timing of the first cell, and the first base station is the base station to which the first cell belongs. Yes,
7. The determination unit is characterized in that the determination unit is specifically configured to determine the downlink synchronization information of the target cell based on the downlink synchronization offset information of the at least one second cell. Terminal. It ’s a base station,
A terminal that is configured to determine the first instruction information and has received the first instruction information so that the first instruction information transmits data in a second cell that uses the second frequency band. The fixed unit to which the base station belongs to the first cell that uses the first frequency band and is used to instruct
The base station including a transmission / reception unit configured to transmit the first instruction information via the first cell. The first instruction information is paging information, or the paging information and target cell arrangement information, and the first instruction information is the second frequency band information and / or target base station information and / or target cell information. The second cell includes the target cell, and the target base station is the base station to which the target cell belongs.
The transmission / reception unit is specifically configured to transmit the paging information via the first cell, or.
The base station according to claim 9, wherein the transmission / reception unit is specifically configured to transmit the paging information and the arrangement information of the target cell via the first cell. The first instruction information is the system information of the second cell, and the system information of the second cell is the frequency band information of the second cell and / or the base station information to which the second cell belongs and the base station information. / Or includes the second cell information
The transmission / reception unit is further configured to receive system information of at least one second cell transmitted by at least one second base station, and the system information of at least one second cell is the at least one. One-to-one correspondence with two second cells,
The base station according to claim 9, wherein the transmission / reception unit is specifically configured to transmit system information of at least one second cell via the first cell. The transmission / reception unit is further configured to transmit uplink synchronization information via the first cell, the uplink synchronization information is acquired from a target base station by the base station, and the uplink synchronization information is the target. It is determined by the base station in response to the uplink synchronization request transmitted by the terminal to the target base station in the second frequency band, where the target base station is the base station to which the target cell belongs and the target. The base station according to any one of claims 9-11, wherein the cell is determined by the terminal from the at least one second cell. The transmission / reception unit is further configured to transmit the downlink synchronization information of the first cell to the terminal via the first cell, according to any one of claims 9-11. The listed base station. The transmission / reception unit is further configured to transmit at least one downlink synchronization offset information corresponding to the at least one second cell to the terminal via the first cell, and each downlink synchronization offset information is transmitted. 13. The base station according to claim 13, wherein the base station includes a time offset amount between the timing of the corresponding second cell and the timing of the first cell. It ’s a base station,
It is configured to transmit the system information of the second cell to the first base station, the system information is used to indicate the system parameters of the second cell, and the carrier frequency corresponding to the second cell. Is a base station to which the first cell that uses the first frequency band belongs, and the first base station belongs to the second frequency band, and the second cell and the first cell are included in the base station. Equipped with a transmission / reception unit that stores the correspondence with
The base station, wherein the transmission / reception unit is configured to further transmit data to the terminal via the second cell.

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