CN108307396B

CN108307396B - Method and equipment for communication on license-free frequency band

Info

Publication number: CN108307396B
Application number: CN201710023321.7A
Authority: CN
Inventors: 桑超强; 蒋摇; 夏鹏飞; 刘庆文; 吴俊�; 郑娟; 马莎
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-01-12
Filing date: 2017-01-12
Publication date: 2020-09-18
Anticipated expiration: 2037-01-12
Also published as: CN108307396A

Abstract

The embodiment of the invention provides a method and equipment for communication in an unlicensed frequency band, which are used for solving the problem that in the prior art, the transmission process of SAiL equipment in an LTE (Long term evolution) system is incomplete, so that the transmission delay of the SAiL equipment in the LTE system is larger. The method comprises the following steps: the method comprises the steps that first equipment in a WLAN mode receives a WLAN data packet sent by second equipment in the WLAN mode, wherein the WLAN data packet comprises first information used for indicating the second equipment to request uplink transmission with the first equipment in a Long Term Evolution (LTE) mode; the first device sends second information to the second device, where the second information is used to indicate resources that the second device and the first device are allowed to perform uplink transmission in the LTE scheme, and the second device and the first device perform uplink transmission in the LTE scheme.

Description

Method and equipment for communication on license-free frequency band

Technical Field

The present application relates to the field of network technologies, and in particular, to a method and a device for communication in an unlicensed frequency band.

Background

Long-Term Evolution (LTE) is a Long-Term Evolution of Universal Mobile Telecommunications System (UMTS) technology standard established by the third generation Partnership Project (3 GPP) organization, and mainly refers to a communication technology in the 3GPP LTE fourth generation cellular mobile communication System.

Wireless-Fidelity (WiFi) mainly refers to IEEE802.11 Wireless local area network communication technologies represented by IEEE802.11 n and IEEE802.11 ac. Strictly speaking, WiFi is the name of WiFi industry alliance, and the specific technical name should be Wireless Local Area Network (WLAN).

LTE systems have so far been operating mainly in licensed (licensed) frequency bands, while WLANs mostly operate in unlicensed (unlicensed) frequency bands. The Unlicensed band LTE (SAiL) technology is to transplant a conventional LTE technology to an Unlicensed band, and a base station (eNB) and a User Equipment (UE) operating on the Unlicensed band are referred to as SAiL devices. If the LTE technology is transplanted to an unlicensed frequency band in which the WLAN technology works, the SAiL device will switch between the LTE system and the WLAN system, and because the existing LTE technology and WLAN technology are mutually independent technologies, the process of switching the SAiL device between the LTE system and the WLAN system will result in an incomplete transmission process of the SAiL device in the LTE system, and further result in a large transmission delay of the SAiL device in the LTE system.

Disclosure of Invention

The embodiment of the invention provides a method and equipment for communication in an unlicensed frequency band, which are used for solving the problem that in the prior art, the transmission process of SAiL equipment in an LTE (Long term evolution) system is incomplete, so that the transmission delay of the SAiL equipment in the LTE system is larger.

In a first aspect, an embodiment of the present invention provides a method for communication in an unlicensed frequency band, where a first device and a second device involved in the method are both SAiL devices, and the method includes:

a first device in a WLAN mode receives a WLAN data packet sent by a second device in the WLAN mode, wherein the WLAN data packet comprises first information used for indicating the second device to request uplink transmission in a Long Term Evolution (LTE) mode with the first device;

the first device sends second information to the second device, where the second information is used to indicate that the second device and the first device are allowed to perform uplink transmission in an LTE scheme, and resources used by the second device and the first device to perform uplink transmission in the LTE scheme.

The SAiL equipment in the WLAN mode and the LTE mode works in an unlicensed frequency band, and the SAiL equipment is switched between the WLAN mode and the LTE mode. In the method, the first device is an eNB, the second device is a UE, the first information may be an LTE Transmission Request, and the second information may be an LTE Transmission grant.

In the method, for a scenario that the SAiL device is switched from the WLAN system to the LTE system, since the first device in the WLAN system receives the first information, which is sent by the second device in the WLAN system through the WLAN data packet and used for instructing the second device to request uplink transmission in the LTE long term evolution system with the first device, the first device sends the second information to the second device, where the second information is used for instructing the second device and the first device to allow uplink transmission in the LTE system, and a resource used for the second device and the first device to perform uplink transmission in the LTE system, after the first device and the second device are switched from the WLAN system to the LTE system, the second device can perform uplink transmission in the LTE system with the first device on the resource indicated by the second information. Therefore, for a scene that the SAiL device is switched from the WLAN system to the LTE system, the method can solve the problem that the UE and the eNB in the LTE system in the existing SAiL technology cannot perform uplink transmission, thereby causing a large time delay for uplink data transmission between the UE and the eNB in the LTE system.

In the above method, when the first device sends the second information to the second device, the first device and the second device may be in a WLAN system or an LTE system, and the sending of the second information from the first device to the second device is described below according to the two cases.

In a possible implementation manner, when the first device sends the second information to the second device, the first device and the second device are in an LTE system.

In this case, before the first device sends the second information to the second device, the first device switches from the WLAN system to the LTE system, and the second device switches from the WLAN system to the LTE system;

the first device sends the second information to the second device, including:

and the first equipment in the LTE system sends the LTE frame comprising the second information to the second equipment in the LTE system.

In this way, the first device in the LTE standard can send the second information to the second device in the LTE standard, so that after the first device and the second device are switched from the WLAN standard to the LTE standard, the second device can perform uplink transmission in the LTE standard with the first device on the resource indicated by the second information.

In a possible implementation manner, based on a situation that the first device and the second device are in an LTE system when the first device sends the second information to the second device, the WLAN data packet further includes a long training LTF field;

before the first device in the LTE standard sends an LTE frame including the second information to the second device in the LTE standard, the first device performs uplink channel estimation according to the LTF field, and calculates a first difference value and a second difference value, where the first difference value is a time difference between occurrence time of the uplink channel estimation and estimated time when the first device sends the LTE frame including the second information to the second device, and the second difference value is a difference value between a physical moving speed of the first device and a physical moving speed of the second device;

and the first equipment predicts a downlink channel according to the uplink channel estimation, the first difference value and the second difference value, wherein the predicted downlink channel is used for the first equipment to send the LTE frame comprising the second information to the second equipment.

In this way, the first device can predict a downlink channel according to the LTF field included in the WLAN data packet, and then the first device sends the LTE frame including the second information to the second device according to the predicted downlink channel.

In a possible implementation manner, when the first device sends the second information to the second device, the first device and the second device are in a WLAN system.

In this case, the first device transmits the second information to the second device, including:

the first equipment in the WLAN mode sends a WLAN data packet comprising the second information to the second equipment in the WLAN mode;

after the first device sends the second information to the second device, the first device switches from the WLAN system to the LTE system, and the second device switches from the WLAN system to the LTE system.

In this way, the first device in the WLAN system can send the second information to the second device in the LTE system, so that after the first device and the second device are switched from the WLAN system to the LTE system, the second device can perform uplink transmission in the LTE system with the first device on the resource indicated by the second information.

In a possible implementation manner, based on a situation that the first device and the second device are in the WLAN system when the first device sends the second information to the second device, the second information includes resource block allocation information, transmission power control TPC, and a frequency hopping signal.

Thus, the first device can transmit the second information to the second device through the WLAN data packet.

In a second aspect, an embodiment of the present invention further provides a method for communicating on an unlicensed frequency band, where a first device and a second device involved in the method are SAiL devices, and the method includes:

the method comprises the steps that second equipment in a WLAN mode sends a WLAN data packet to first equipment in the WLAN mode, wherein the WLAN data packet comprises first information used for indicating the second equipment to request uplink transmission with the first equipment in a Long Term Evolution (LTE) mode;

the second device receives second information sent by the first device, where the second information is used to indicate that the second device and the first device are allowed to perform uplink transmission in an LTE scheme, and resources used by the second device and the first device to perform uplink transmission in the LTE scheme.

In the method, for a scenario that the SAiL device is switched from the WLAN system to the LTE system, the second device in the WLAN system sends, to the first device in the WLAN system through the WLAN data packet, first information for instructing the second device to request uplink transmission in the LTE system with the first device, and the second device receives second information sent by the first device, where the second information is used to instruct the second device and the first device to allow uplink transmission in the LTE system, and a resource used by the second device and the first device to perform uplink transmission in the LTE system, so that after the first device and the second device are switched from the WLAN system to the LTE system, the second device can perform uplink transmission in the LTE system with the first device on the resource indicated by the second information. Therefore, for a scene that the SAiL device is switched from the WLAN system to the LTE system, the method can solve the problem that the UE and the eNB in the LTE system in the existing SAiL technology cannot perform uplink transmission, thereby causing a large time delay for uplink data transmission between the UE and the eNB in the LTE system.

In the above method, when the second device receives the second information sent by the first device, the first device and the second device may be in a WLAN system or an LTE system, and the following describes, according to the two cases, when the second device receives the second information sent by the first device.

In a possible implementation manner, when the second device receives the second information sent by the first device, the first device and the second device are in an LTE system.

In this case, before the second device receives the second information sent by the first device, the second device switches from the WLAN system to the LTE system, and the first device switches from the WLAN system to the LTE system;

the second device receives the second information sent by the first device, and the second information includes:

and the second equipment in the LTE system receives the LTE frame which is sent by the first equipment in the LTE system and comprises the second information.

In this way, the second device in the LTE standard can receive the second information sent by the first device in the LTE standard, so that after the first device and the second device are switched from the WLAN standard to the LTE standard, the second device can perform uplink transmission in the LTE standard with the first device on the resource indicated by the second information.

In a possible implementation manner, when the second device receives the second information sent by the first device, the first device and the second device are in a WLAN system.

In this case, the second device receiving the second information sent by the first device includes:

the second equipment in the WLAN mode receives a WLAN data packet which is sent by the first equipment in the WLAN mode and comprises the second information;

after the second device receives the second information sent by the first device, the second device switches from the WLAN system to the LTE system, and the first device switches from the WLAN system to the LTE system.

In this way, the second device in the WLAN system can receive the second information sent to the first device in the LTE system, so that after the first device and the second device are switched from the WLAN system to the LTE system, the second device can perform uplink transmission in the LTE system with the first device on the resource indicated by the second information.

In a possible implementation manner, based on a situation that the first device and the second device are in the WLAN system when the second device receives the second information sent by the first device, the second information includes resource block allocation information, transmission power control TPC, and a frequency hopping signal.

Thus, the second device can receive the second information sent by the first device through the WLAN data packet.

In a third aspect, an embodiment of the present invention further provides a first device, where the first device is configured to perform the method provided in the first aspect, and the first device includes:

a transceiver unit, configured to receive, when the first device is in a WLAN standard of a wireless local area network, a WLAN data packet sent by a second device in the WLAN standard, where the WLAN data packet includes first information used to instruct the second device to request uplink transmission in an LTE long term evolution standard with the first device;

a processing unit, configured to determine second information after the transceiver unit receives the first information, where the second information is used to indicate that the second device and the first device are allowed to perform uplink transmission in an LTE scheme, and a resource used by the second device and the first device to perform uplink transmission in the LTE scheme;

the transceiver unit is further configured to send the second information determined by the processing unit to the second device.

In one possible implementation, the processing unit is further configured to:

before the transceiver unit sends the second information to the second device, controlling the first device to switch from a WLAN mode to an LTE mode;

when the transceiver unit sends the second information to the second device, the transceiver unit is specifically configured to:

and after the processing unit controls the first equipment to be switched to the LTE system, sending an LTE frame including the second information to the second equipment in the LTE system.

In a possible implementation manner, the WLAN data packet further includes a long training LTF field;

the processing unit is further to:

before the transceiver unit sends an LTE frame including the second information to the second device in an LTE scheme, performing uplink channel estimation according to the LTF field, and calculating a first difference value and a second difference value, where the first difference value is a time difference between an occurrence time of the uplink channel estimation and an estimated time when the first device sends the LTE frame including the second information to the second device, and the second difference value is a difference value between a physical moving speed of the first device and a physical moving speed of the second device;

predicting a downlink channel according to the uplink channel estimation, the first difference and the second difference, wherein the predicted downlink channel is used for the transceiver unit to send the LTE frame including the second information to the second device.

In a possible implementation manner, when sending the second information to the second device, the transceiver unit is specifically configured to:

when the first equipment is in a WLAN mode, sending a WLAN data packet comprising the second information to the second equipment in the WLAN mode;

the processing unit is further to:

and after the transceiver unit sends the second information to the second device, controlling the first device to switch from the WLAN mode to the LTE mode.

In one possible implementation, the second information includes resource block allocation information, transmission power control TPC, and a frequency hopping signal.

In a fourth aspect, an embodiment of the present invention further provides a first device, including: a processor, a memory, and a transceiver;

the transceiver is used for receiving and transmitting data;

the memory is to store instructions;

the processor is configured to execute the instructions in the memory to perform the method provided by the first aspect.

In a fifth aspect, an embodiment of the present invention further provides a computer storage medium for storing computer software instructions for a first device in the first aspect, which includes instructions for executing a program designed in the first aspect.

In a sixth aspect, an embodiment of the present invention further provides a second device, where the second device is configured to execute the method provided in the second aspect, and the second device includes:

the processing unit is used for determining first information when the second equipment is in a Wireless Local Area Network (WLAN) mode, wherein the first information is used for indicating the second equipment to request uplink transmission with the first equipment in a Long Term Evolution (LTE) mode;

a transceiver unit, configured to send a WLAN data packet to the first device in a WLAN mode when the second device is in the WLAN mode, where the WLAN data packet includes the first information determined by the processing unit;

the transceiver unit is further configured to receive second information sent by the first device after sending the first information to the first device, where the second information is used to indicate that uplink transmission in an LTE scheme is allowed to be performed between the second device and the first device, and a resource used by the second device and the first device for uplink transmission in the LTE scheme is allowed.

In one possible implementation, the processing unit is further configured to:

before the transceiver unit receives the second information sent by the first device, controlling the second device to switch from a WLAN mode to an LTE mode;

when receiving the second information sent by the first device, the transceiver unit is specifically configured to:

and after the processing unit controls the second device to switch to the LTE system, receiving an LTE frame which is sent by the first device under the LTE system and comprises the second information.

In a possible implementation manner, when receiving the second information sent by the first device, the transceiver unit is specifically configured to:

when the second device is in a WLAN mode, receiving a WLAN data packet which is sent by the first device in the WLAN mode and comprises the second information;

the processing unit is further to:

and after the transceiver unit receives the second information sent by the first device, controlling the second device to switch from the WLAN mode to the LTE mode.

In one possible implementation, the second information includes resource block allocation information, transmission power control, and a frequency hopping signal.

In a seventh aspect, an embodiment of the present invention further provides a second device, including: a processor, a memory, and a transceiver;

the transceiver is used for receiving and transmitting data;

the memory is to store instructions;

the processor is used for executing the instructions in the memory and executing the method provided by the second aspect.

In an eighth aspect, the present invention further provides a computer storage medium for storing computer software instructions for a second device in the second aspect, which includes instructions for executing a program designed in the second aspect.

In a ninth aspect, an embodiment of the present invention provides a method for communicating on an unlicensed frequency band, where a first device and a second device involved in the method are both SAiL devices, and the method includes:

the method comprises the steps that LTE transmission is carried out between first equipment in a long-term evolution LTE system and second equipment in the LTE system;

when data which are not transmitted completely exist in the LTE transmission process and need to be sent to the second equipment by the first equipment, and the first equipment and the second equipment are to be switched from the LTE system to the WLAN system, the first equipment sets a priority parameter, and the set priority parameter indicates that the first equipment switched to the WLAN system preferentially sends a WLAN data packet compared with other equipment in the WLAN system;

the first equipment is switched to the WLAN mode from the LTE mode, and the second equipment is switched to the WLAN mode from the LTE mode;

and the first equipment in the WLAN mode sends a WLAN data packet to the second equipment in the WLAN mode according to the set priority parameter, wherein the WLAN data packet comprises the data which are not transmitted completely.

The SAiL equipment in the WLAN mode and the LTE mode works in an unlicensed frequency band, and the SAiL equipment is switched between the WLAN mode and the LTE mode. In the method, the first device is an eNB and the second device is a UE, or the first device is a UE and the second device is an eNB.

According to the method, for a scene that SAiL equipment is switched from an LTE system to a WLAN system, LTE transmission is carried out between first equipment in the LTE system and second equipment in the LTE system, when data which are not transmitted exist in the LTE transmission process and need to be sent to the second equipment by the first equipment, and the first equipment and the second equipment are to be switched from the LTE system to the WLAN system, the first equipment can preferentially send a WLAN data packet to the second equipment by setting a priority parameter compared with other equipment in the WLAN system after the first equipment and the second equipment are switched from the LTE system to the WLAN system, and the WLAN data packet comprises the data which are transmitted in the LTE transmission process, so that the LTE transmission process between the first equipment and the second equipment can be completed as soon as possible. Therefore, for a scene that the SAiL equipment is switched from the LTE mode to the WLAN mode, the method can solve the problem that the LTE transmission process of the UE and the eNB is incomplete and further the time delay of the LTE transmission process of the UE and the eNB is large in the existing SAiL technology.

In a possible implementation manner, when the first device is a base station and the second device is a user equipment UE, the setting, by the first device, a priority parameter includes:

determining and setting, by the first device, the priority parameter; or

When the first device is a UE and the second device is a base station, the first device sets a priority parameter, including:

and the first equipment receives the priority parameter sent by the second equipment and sets the received priority parameter.

Therefore, the first device can obtain the priority parameter, and then the first device performs setting according to the obtained priority parameter, so that the first device in the WLAN system can preferentially send the WLAN data packet to the second device compared with other devices in the WLAN system.

In one possible implementation, the priority parameter includes one or a combination of the following parameters:

and the inter-frame interval, the transmitting power, the size of a contention window and the idle channel estimation of the first equipment in the WLAN mode.

In a tenth aspect, an embodiment of the present invention provides a method for communicating on an unlicensed frequency band, where a first device and a second device involved in the method are both SAiL devices, and the method includes:

the second equipment in the LTE system performs LTE transmission with the first equipment in the LTE system;

the second equipment is switched to a Wireless Local Area Network (WLAN) mode from an LTE mode, and the first equipment is switched to the WLAN mode from the LTE mode;

the second device in the WLAN mode receives a WLAN data packet sent by the first device in the WLAN mode after setting a priority parameter, where the WLAN data packet includes data that is not transmitted in the LTE transmission process, and the set priority parameter indicates that the first device switched to the WLAN mode preferentially sends the WLAN data packet compared with other devices in the WLAN mode.

According to the method, for a scene that SAiL equipment is switched from an LTE mode to a WLAN mode, LTE transmission is carried out on first equipment in the LTE mode and second equipment in the LTE mode, after the first equipment and the second equipment are switched from the LTE mode to the WLAN mode, the second equipment in the WLAN mode receives a WLAN data packet sent by the first equipment in the WLAN mode after priority parameters are set, and the WLAN data packet comprises data which are not transmitted in the LTE transmission process. Because the first device sets the priority parameter, after the first device and the second device are switched from the LTE system to the WLAN system, compared with other devices in the WLAN system, the first device may preferentially send the WLAN data packet to the second device, so that the data that is not transmitted in the LTE transmission process is sent to the second device through the WLAN data packet, and thus the LTE transmission process between the first device and the second device can be completed as soon as possible. Therefore, for a scene that the SAiL equipment is switched from the LTE mode to the WLAN mode, the method can solve the problem that the LTE transmission process of the UE and the eNB is incomplete and further the time delay of the LTE transmission process of the UE and the eNB is large in the existing SAiL technology.

In a possible implementation manner, before the second device in the WLAN system receives a WLAN data packet sent by the first device in the WLAN system after the priority parameter is set, when the first device is a UE and the second device is a base station, the second device sends the priority parameter to the first device.

In an eleventh aspect, an embodiment of the present invention further provides a first apparatus, configured to execute the method provided in the ninth aspect, where the first apparatus includes:

the processing unit is used for carrying out LTE transmission with second equipment in an LTE mode through the receiving and sending unit when the first equipment is in the LTE mode;

the processing unit is further configured to set a priority parameter of the first device when there is data that is not transmitted in the LTE transmission process and needs to be sent to the second device by the first device, and the first device and the second device are to be switched from an LTE format to a WLAN format of a wireless local area network, where the set priority parameter indicates that the first device switched to the WLAN format preferentially sends a WLAN packet compared to other devices in the WLAN format;

the processing unit is further configured to control the first device to switch from an LTE standard to a WLAN standard;

and the transceiver unit is configured to send a WLAN data packet to the second device in the WLAN standard according to the priority parameter set by the first device after the processing unit controls the first device to switch to the WLAN standard, where the WLAN data packet includes the data that is not transmitted.

In a possible implementation manner, when setting the priority parameter, the processing unit is specifically configured to:

when the first equipment is a base station and the second equipment is User Equipment (UE), determining and setting the priority parameter; alternatively, the first and second electrodes may be,

and when the first equipment is UE and the second equipment is a base station, receiving the priority parameter sent by the second equipment through the transceiver unit, and setting the received priority parameter.

In a twelfth aspect, an embodiment of the present invention further provides a first device, including: a processor, a memory, and a transceiver;

the transceiver is used for receiving and transmitting data;

the memory is to store instructions;

the processor is configured to execute the instructions in the memory and execute the method provided by the ninth aspect.

In a thirteenth aspect, an embodiment of the present invention further provides a computer storage medium for storing computer software instructions for the first device in the ninth aspect, which contains instructions for executing the program designed in the ninth aspect.

In a fourteenth aspect, an embodiment of the present invention further provides a second device, where the second device is configured to execute the method provided in the tenth aspect, and the second device includes:

the processing unit is used for carrying out LTE transmission with the first equipment in the LTE mode through the receiving and sending unit when the second equipment is in the LTE mode;

the processing unit is further configured to control the second device to switch from an LTE standard to a WLAN standard;

the transceiver unit is configured to receive a WLAN data packet sent by the first device in the WLAN standard after the processing unit controls the second device to switch to the WLAN standard, where the WLAN data packet includes data that is not completely transmitted in the LTE transmission process, and the set priority parameter indicates that the first device switched to the WLAN standard preferentially sends the WLAN data packet compared to other devices in the WLAN standard.

In a possible implementation manner, the transceiver unit is further configured to:

before receiving a WLAN data packet sent by the first device in the WLAN mode after setting the priority parameter, when the first device is a UE and the second device is a base station, sending the priority parameter to the first device.

In a fifteenth aspect, an embodiment of the present invention further provides a second device, including: a processor, a memory, and a transceiver;

the transceiver is used for receiving and transmitting data;

the memory is to store instructions;

the processor is configured to execute the instructions in the memory and execute the method provided by the tenth aspect.

In a sixteenth aspect, the present invention provides a computer storage medium for storing computer software instructions for the second device in the tenth aspect, which contains instructions for executing the program designed in the tenth aspect.

Drawings

FIG. 1 is a diagram of a network architecture suitable for use with an embodiment of the present invention;

fig. 2A is a schematic structural diagram of an SAiL device according to an embodiment of the present invention;

fig. 2B is a schematic structural diagram of another SAiL device according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for communication over an unlicensed frequency band according to an embodiment of the present invention;

fig. 4A is a flowchart illustrating a method for communication over an unlicensed frequency band according to an embodiment of the present invention;

fig. 4B is a transmission diagram of a method for communication over an unlicensed frequency band according to an embodiment of the present invention;

fig. 5A is a flowchart illustrating another method for communication over an unlicensed frequency band according to an embodiment of the present invention;

fig. 5B is a transmission diagram illustrating another method for communication over an unlicensed frequency band according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a method for communication over an unlicensed frequency band according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first device according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of another first device according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second apparatus according to a third embodiment of the present invention;

fig. 10 is a schematic structural diagram of another second apparatus according to a third embodiment of the present invention;

fig. 11 is a schematic structural diagram of a first device according to a fourth embodiment of the present invention;

fig. 12 is a schematic structural diagram of another first apparatus according to a fourth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a second apparatus according to a fourth embodiment of the present invention;

fig. 14 is a schematic structural diagram of another second device according to a fourth embodiment of the present invention.

Detailed Description

In order to make the technical solutions, objects and advantages provided by the embodiments of the present invention clearer, the present application will be further described in detail with reference to the accompanying drawings.

To facilitate understanding of the embodiments of the present invention, some background art related to the embodiments of the present invention will be described as follows:

spectrum resource

LTE systems have so far been operating mainly on frequency bands that require admission. In general, an operator first acquires a radio spectrum for charging and then provides a charging service in a certain coverage area by installing an eNB or the like. Since the spectrum itself is paid for by the operator, the operator may and needs to have tight control over this spectrum resource. In view of this, the LTE system is a communication system basically adopting centralized control, the eNB has great authority, and the UE basically listens to the scheduling of the eNB, including the time when the UE receives and transmits data, the resource blocks used when receiving and transmitting data, and the like.

WLANs operate mostly in unlicensed bands, such as the 2.4 gigahertz (GHz) spectrum or the 5GHz spectrum. Since the spectrum itself does not require cost, operator intervention may not be required in most cases. A user (individual or business) can provide free or charged services within a certain range by only installing a router device as an Access Point (AP). Since the spectrum itself is freely available to the user, the user does not need to have strict control over the spectrum resources.

In view of this, the WLAN/WiFi system is a communication system basically adopting distributed control, and although the AP provides functions of sub-network management (such as network access, authentication, etc.), most of the time, the AP and the Station (STA) are in relatively equal roles. The time for the STA to receive and transmit data is basically determined by the STA itself without listening to the schedule of the AP. Meanwhile, the AP also needs to comply with channel access rules consistent with the STA, such as Carrier Sense Multiple Access (CSMA).

Transmission system

An uplink channel and a downlink channel of the LTE system can be in the same frequency point, namely a time division duplex TDD mode; or in different frequency points, namely the frequency division duplex FDD system. In a conventional cellular mobile communication system, the FDD scheme is widely used.

In contrast, the IEEE802.11 wlan mainly adopts TDD. In fact, there is no specific uplink or downlink division in IEEE802.11, because the roles of AP and STA are basically equal. For convenience, the link from the AP to the STA is referred to herein as the downlink and the link from the STA to the AP is referred to herein as the uplink.

Scheduling and channel access

In the LTE system, the UE needs to receive downlink signaling sent from the eNB first to receive data. Downlink channel assignment is generally sent out through Downlink control channel PDCCH, and informs UE of the time, frequency band or resource block to receive Downlink data, and informs UE of the format of data sending, such as number of codewords, closed loop MIMO, open loop MIMO, dual layer interference demodulation, multi-user MIMO, and so on. According to the information in the PDCCH, the UE demodulates the data by using a specified format from a specified time to a specified resource block. In this process, the UE may provide a certain degree of feedback information, such as channel feedback, CQI feedback, etc., to report the basic situation of the current channel. However, the final scheduling decision is determined by the eNB full weight, that is, the eNB may determine downlink channel assignment completely according to the feedback of the UE, or may determine downlink channel assignment by the feedback of the override UE. The user has to comply with the eNB's downlink channel assignment. On the other hand, in the LTE system, the UE needs to receive uplink graphs sent by the eNB first to send data. Similar to the downlink situation, uplinkgrants are generally sent out through downlink control channel PDCCH, and inform the UE at what time, what frequency band or resource block to send uplink data. The user must comply with the uplink graphs of the eNB and cannot select when and what frequency band to transmit data.

In contrast, the IEEE802.11 wireless lan employs a distributed scheduling policy distribution function DCF. In the IEEE802.11 system, each transmitter (STA in uplink or AP in downlink) is scheduled by itself to decide when to transmit data. In the current IEEE802.11 system (as far as IEEE802.11ac/ah), the transmission frequency band is the entire system frequency band. Therefore, the transmitter does not need to select frequency bands or resource blocks and directly transmits signals on the whole system frequency band. The receiver may provide a degree of channel feedback, such as channel state information feedback or SNR feedback (similar to CQI feedback in LTE systems). However, these feedbacks are only used to reference the transmitter, which can decide the transmitted signal power, modulation and demodulation scheme, etc. according to its own algorithm. Since each transmitter determines the transmission time by itself and each transmitter does not know whether other transmitters perform transmission operations at the same time, channel collision and interference inevitably occur. In view of this, IEEE802.11 adopts Carrier sensing multiple Access with Collision Avoidance-based Carrier sensing technology to solve and mitigate the interference problem.

The technical scheme provided by the embodiment of the invention is suitable for the SAiL technology. The SAiL technology is to transfer the LTE technology to an unlicensed frequency band, and both the LTE system and the WLAN system operate in the unlicensed frequency band. The device operating in the unlicensed frequency band is referred to as an SAiL device, the SAiL device may include an eNB and a UE operating in the unlicensed frequency band in an LTE system, and an AP and an STA operating in the unlicensed frequency band in a WLAN system, one SAiL device may be the eNB or the UE in the LTE system, the SAiL device may be switched from the LTE system to the WLAN system, and the SAiL device in the WLAN system may be the AP or the STA. Taking the schematic diagram of the network architecture shown in fig. 1 as an example, the network architecture involves SAiL devices including eNB110, UE 120, AP 130, and STA 140.

In order to realize that the LTE technology is transplanted to the unlicensed frequency band, the SAiL device needs to switch between the LTE system and the WLAN system. The controller is mainly used for controlling SAiL equipment to switch between an LTE system and a WLAN system, the SAiL equipment in the LTE system receives or sends an LTE frame through an LTE transceiver, and the SAiL equipment in the WLAN system receives or sends a WLAN data packet through a WLAN transceiver.

Fig. 2A is a schematic structural diagram of an SAiL device according to an embodiment of the present invention, where the structure is suitable for a narrow-band scenario, where the narrow-band refers to a channel with a system bandwidth of 20 megahertz (MHz), and generally refers to a minimum operating bandwidth of a WLAN. In the SAiL device shown in fig. 2A, the LTE transceiver and the WLAN transceiver share a set of Radio Frequency (RF) and transceiver antennas, so that the LTE transceiver and the WLAN transceiver cannot operate simultaneously. Fig. 2B is a schematic structural diagram of another SAiL device according to an embodiment of the present invention, where the structure is suitable for a broadband scenario, where broadband refers to a system bandwidth that is multiple 20MHz channels. In the SAiL device shown in fig. 2B, the LTE transceiver and the WLAN transceiver use separate RF and transceiver antennas, so that the LTE transceiver and the WLAN transceiver can operate simultaneously, and in the case of simultaneous operation of the LTE transceiver and the WLAN transceiver, the operating frequency of the LTE transceiver and the operating frequency of the WLAN transceiver may be two different operating frequencies, but both of them are located in the unlicensed frequency band.

It should be noted that the LTE transceiver and the WLAN transceiver in the SAiL device may be collectively referred to as SAiL transceiver, and the SAiL transceiver may have two network identities or addresses, i.e. WLAN network address and LTE network address. Wherein the WLAN network address is assigned by the WLAN AP and the LTE network address is assigned by the LTE network side.

In the prior art, an LTE technology is transplanted to an unlicensed frequency band in which a WLAN technology works, and an SAiL device is to be switched between an LTE system and a WLAN system. The following describes, by taking different scenarios as examples, a problem that in the prior art, a transmission process of the SAiL device in the LTE system is incomplete, and thus transmission delay of the SAiL device in the LTE system is large.

Scene one: SAiL equipment is switched to LTE system from WLAN system

Taking the case that the SAiL device is switched from the WLAN system to the LTE system, since the SAiL device in the WLAN system can directly communicate with each other, after the SAiL device is switched to the LTE system, since the UE in the SAiL device that needs uplink data Transmission does not send an LTE Scheduling Request (Scheduling Request) message to the eNB, the eNB cannot know which UEs need uplink data Transmission, and the eNB cannot send an LTE Transmission grant (Transmission grant) message to the UE that needs uplink data Transmission, which will cause the UE and the eNB in the LTE system to not perform uplink data Transmission, and further cause a large delay in uplink data Transmission between the UE in the LTE system and the eNB.

Scene two: SAiL equipment is switched to WLAN system from LTE system

Taking the case that the SAiL device is switched from the LTE system to the WLAN system, the UE and the eNB in the LTE system perform LTE transmission, and when there is unfinished signaling data between the UE and the eNB in the LTE transmission process, the UE and the eNB switch from the LTE system to the WLAN system, and after the UE and the eNB perform WLAN transmission after the UE and the eNB switch to the WLAN system, the LTE transmission process may be incomplete, and further the LTE transmission process may have a longer delay. For example, the incomplete signaling data between the UE and the eNB may be Acknowledgement (ACK)/Negative Acknowledgement (NACK).

In order to solve the problem that the transmission process of the SAiL device in the LTE system is incomplete in the prior art, which results in a large transmission delay of the SAiL device in the LTE system, an embodiment of the present invention provides a method and a device for communication in an unlicensed frequency band. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

Example one

For the scenario that an SAiL device is switched from a WLAN system to an LTE system, an embodiment of the present invention provides a method for communication in an unlicensed frequency band, as shown in fig. 3, where an interaction flow between a first device and a second device in the method is as follows:

s301, the second device sends a WLAN data packet to the first device, wherein the WLAN data packet comprises first information.

In S301, the first device and the second device are both in the WLAN system, so that the second device sends a WLAN data packet to the first device, where the first information included in the WLAN data packet is used to indicate the second device to request uplink transmission in the LTE system with the first device. As can be seen from the first information, the first device is an eNB when in the LTE system, and the second device is a UE when in the LTE system.

The first information in S301 refers to an LTE Scheduling Request, and the LTE Scheduling Request is carried in a WLAN data packet. In the existing LTE system, the LTE Scheduling Request is sent by the UE to the eNB through a Physical Uplink Control Channel (PUCCH) Format (Format)1, so in S301 of this embodiment, the LTE Scheduling Request carried by the WLAN packet should at least include a field in the PUCCH Format1 for indicating the LTE Scheduling Request, for example, a field including a User address (User ID/ADDR).

S302, the first device sends second information to the second device.

The second information in S302 is used to indicate resources that allow the second device and the first device to perform uplink Transmission in the LTE scheme, and the second device and the first device to perform uplink Transmission in the LTE scheme, where the second information refers to an LTE Transmission grant.

In this embodiment, S302 may be implemented by the following two cases:

the first condition is as follows: after the second device sends the first information to the first device in S301 and before the first device sends the second information to the second device in S302, the first device switches from the WLAN system to the LTE system, and the second device switches from the WLAN system to the LTE system.

Based on the first situation, when the first device sends the second information to the second device in S302, both the first device and the second device are in the LTE system, and the first device in the LTE system sends the LTE frame including the second information to the second device in the LTE system, that is, the eNB sends the downlink frame including the LTE Transmission grant to the UE, which is the same as a LTE Transmission grant sending process in the existing LTE system. After the first device sends the second information to the second device S302, the second device may perform uplink Transmission in the LTE scheme with the first device according to the resource indicated by the second information, that is, the UE in the LTE scheme performs LTE uplink Transmission to the eNB in the LTE scheme on the resource indicated by the LTE Transmission grant.

Based on the first situation, a method for communicating on an unlicensed frequency band provided in this embodiment may be a schematic diagram of a method flow shown in fig. 4A, where an interaction process between an eNB (first device) and a UE (second device) in fig. 4A is as follows:

s401, when the UE and the eNB are both in the WLAN mode, the UE sends a WLAN data packet comprising an LTE scheduling request to the eNB.

The WLAN packet in S401 further includes a Long Training Field (LTF), and the LTF is used for the eNB to perform uplink channel estimation. The WLAN packet in the existing WLAN system may include LTF fields, such as Legacy-Long Training Field (L-LTF), high throughput Long Training Field (HT-LTF), or Very high throughput Long Training Field (VHT-LTF), and the eNB may perform uplink channel estimation and more accurate uplink channel frequency offset estimation and time synchronization according to the L-LTF fields, and may perform MIMO uplink channel estimation according to the HT-LTF fields or the VHT-LTFs.

S402, the eNB carries out uplink channel estimation according to the LTF field included by the WLAN data packet, and predicts a downlink channel according to the uplink channel estimation.

In S402, the eNB performs uplink channel estimation according to the LTF field included in the WLAN data packet, as described in S401. The process of predicting the downlink channel by the eNB according to the uplink channel estimation in S402 is as follows:

the eNB calculates a first difference value and a second difference value, wherein the first difference value is a time difference between the occurrence time of uplink channel estimation and the estimated time for the eNB to send an LTE frame to the UE, and the second difference value is a difference value between the physical moving speed of the eNB and the physical moving speed of the UE;

and the eNB predicts the downlink channel according to the uplink channel estimation, the first difference value and the second difference value. Wherein, the downlink channel can be predicted by using (least mean square, LMS) method according to the uplink channel estimation and the first difference. The second difference determines the difference or variation between the uplink channel and the downlink channel, and the greater the second difference, the greater the variation between the uplink channel and the downlink channel.

S403, the eNB switches from the WLAN mode to the LTE mode, and the UE switches from the WLAN mode to the LTE mode.

S404, the eNB sends an LTE frame comprising an LTE Transmission grant to the UE according to the predicted downlink channel.

The eNB may determine downlink Channel information, such as information of a Channel Quality Indicator (CQI), a Rank (RI) of a precoding matrix, a Precoding Matrix Index (PMI), and the like, through the downlink Channel predicted in S402. The eNB can calculate a CQI according to the predicted downlink channel, and the CQI is used for the eNB to select and adjust a Coding Scheme (MCS); the eNB can calculate RI and PMI according to the predicted downlink channel, and the RI and PMI are used for the eNB to select a downlink wave speed generator (coder) or a precoder (precoder).

S405, the UE transmits uplink data to the eNB on the resource indicated by the LTE Transmission grant.

To facilitate understanding of the method shown in fig. 4A, this embodiment further provides a transmission diagram of a method for communicating on an unlicensed frequency band as shown in fig. 4B, where the method shown in fig. 4B is the same as the method shown in fig. 4A, and details of the method shown in fig. 4B are not repeated here.

Case two: after the first device sends the second information to the second device in S302, the first device switches from the WLAN system to the LTE system, and the second device switches from the WLAN system to the LTE system.

Based on the second condition, when the first device sends the second information to the second device in S302, both the first device and the second device are in the WLAN standard, and the first device in the WLAN standard sends a WLAN packet including the second information to the second device in the WLAN standard, that is, the eNB sends the WLAN packet including the LTE Transmission grant to the UE. After the first device sends the second information to the second device in step S302, the first device switches from the WLAN system to the LTE system, and the second device switches from the WLAN system to the LTE system; and the second device performs uplink Transmission in the LTE scheme with the first device according to the resource indicated by the second information, that is, the UE in the LTE scheme performs LTE uplink Transmission to the eNB in the LTE scheme on the resource indicated by the LTE Transmission grant.

Based on the second situation, the method for communicating on the unlicensed frequency band provided in this embodiment may be a schematic diagram of a method flow shown in fig. 5A, where an interaction process between an eNB (first device) and a UE (second device) in fig. 5A is as follows:

s501, when the UE and the eNB are both in the WLAN mode, the UE sends a WLAN data packet comprising an LTE scheduling request to the eNB.

The LTE Scheduling Request in S501 is used to instruct the UE to Request uplink transmission in the LTE scheme with the eNB.

S502, the eNB sends a WLAN data packet comprising the LTE Transmission grant to the UE.

The WLAN of the LTE Transmission grant in S502 is used to instruct the UE and the eNB to be allowed to perform uplink Transmission in the LTE scheme, and resources used by the UE and the eNB to perform uplink Transmission in the LTE scheme.

In the conventional LTE system, the LTE Transmission grant is transmitted from the eNB to the UE through Downlink Control Information (DCI) format 0, and mainly includes resource block allocation (RBassignment) Information, Transmission Power Control (TPC) Information, Frequency Hopping signal (Frequency Hopping Flag), and other Information, so that the LTE Transmission grant carried in the WLAN packet in S502 should at least include Information such as RB assignment, TPC, Frequency Hopping Flag, and the like, in order to be compatible with uplink Transmission in the LTE scheme performed after the eNB and the UE switch from the WLAN scheme to the LTE scheme. In this embodiment, a new field may be designed in the WLAN packet to carry the LTE Transmission grant.

S503, the eNB switches from the WLAN mode to the LTE mode, and the UE switches from the WLAN mode to the LTE mode

S504, the UE transmits uplink data to the eNB on the resource indicated by the LTE Transmission grant.

To facilitate understanding of the method shown in fig. 5A, this embodiment further provides a schematic diagram of a method for communicating on an unlicensed frequency band as shown in fig. 5B, where the method shown in fig. 5B is the same as the method shown in fig. 5A, and details of the method shown in fig. 5B are not repeated here.

In the method for communicating on an unlicensed frequency band provided in the first embodiment, in a scenario where an SAiL device is switched from a WLAN system to an LTE system, because a second device sends, to a first device through a WLAN packet in the WLAN system, first information, that is, an LTE Scheduling Request, for instructing the second device to Request uplink transmission in an LTE long term evolution system with the first device, the first device sends, to the second device through the WLAN packet in the WLAN system, second information, that is, after the first device and the second device are switched from the WLAN system to the LTE system, the first device sends, to the second device through an LTE frame in the LTE system, where the second information is used to instruct that the second device and the first device are allowed to perform uplink transmission in the LTE system, and a resource used by the second device and the first device to perform uplink transmission in the LTE system is used, that is, the LTE Transmission grant, in the LTE scheme, the second device may perform uplink Transmission in the LTE scheme with the first device on the resource indicated by the LTE Transmission grant. Therefore, for a scenario in which the SAiL device is switched from the WLAN system to the LTE system, the method provided by the first embodiment can solve the problem that the UE and the eNB in the LTE system cannot perform uplink transmission, thereby causing a large time delay for uplink data transmission between the UE and the eNB in the LTE system.

It should be noted that the method provided in the first embodiment and the method provided in the second embodiment may be executed independently from each other or may be executed in combination.

Example two

Aiming at the situation that the second SAiL device is switched from the LTE system to the WLAN system, the embodiment of the invention provides a method for communication on an unlicensed frequency band, which relates to a first device and a second device, wherein the first device is an eNB and the second device is a UE under the LTE system, or the first device is the UE and the second device is the eNB under the LTE system.

As shown in fig. 6, an interaction procedure of a first device and a second device in a method for communication on an unlicensed frequency band according to an embodiment of the present invention is as follows:

s601, carrying out LTE transmission on the first equipment in the LTE system and the second equipment in the LTE system.

For example, the LTE transmission procedure by the first device with the second device may include: the UE in the first device and the second device sends an LTE Scheduling Request to the eNB, the eNB sends an LTE Transmission grant to the UE, and the UE sends uplink data to the eNB on the resource indicated by the LTETransmission grant.

S602, when data which are not transmitted completely exist in the LTE transmission process and need to be sent to second equipment by first equipment, and the first equipment and the second equipment are to be switched from the LTE mode to the WLAN mode, the first equipment sets a priority parameter.

The priority parameter set in S602 indicates that the first device switched to the WLAN system preferentially transmits a WLAN packet compared to other devices in the WLAN system. For example, when the second device sends data to the second device in the LTE scheme, the first device needs to reply ACK/NACK to the second device at this time, where the ACK/NACK is used to indicate whether the first device successfully receives the data sent by the second device, but the first device and the second device are about to switch from the LTE scheme to the WLAN scheme, and at this time, the data that is not completely transmitted in the LTE transmission process of the first device and the second device may be ACK/NACK.

The purpose of setting the priority parameter by the first device in S602 is that the first device switched to the WLAN standard may preferentially send a WLAN data packet compared to other devices in the WLAN standard, so that the first device sends data that is not completely transmitted in the LTE transmission process to the second device through the WLAN data packet. The first device effects setting the priority parameter by one or a combination of the following:

the first method is as follows: when the priority parameter is inter frame spacing (inter frame spacing), the first device sets the inter frame spacing to a preset value, and the preset value is smaller than the inter frame spacing of other devices in the WLAN system.

The second method comprises the following steps: and when the priority parameter is the transmission power, the first equipment sets the transmission power to be a preset value, and the preset value is larger than the transmission power of other equipment in the WLAN mode.

The third method comprises the following steps: when the priority parameter is a contention window size (contention window size), the first device sets the contention window size to a preset value, and the preset value is smaller than the contention window sizes of other devices in the WLAN system, so that the first device quickly contends for a resource through the set contention window size in the WLAN system, and further sends data which is not transmitted in the LTE transmission process to the second device by using the resource.

The method is as follows: when the priority parameter is Clear Channel Assessment (CCA), the first device sets the CCA to a preset value, and the CCA set by the first device is more aggressive (aggressive) compared with other devices in the WLAN system.

It should be noted that the manner of setting the priority parameter by the first device in this embodiment is not limited to the four manners described above, and may also be other implementation manners, and it is only necessary that the first device switched to the WLAN system may preferentially send the WLAN data packet compared to other devices in the WLAN system.

In this embodiment, valid time of the priority parameter may also be set, for example, the valid time may include starting time and duration of time at which the first device switches from the LTE system to the WLAN system. The priority parameter set by the first device is valid within the valid time, so that the first device can send the data which is not transmitted in the LTE transmission process to the second device as soon as possible through the WLAN data packet after switching to the WLAN mode, and the priority of the first device for sending the WLAN data packet is the same as that of other devices in the WLAN mode after the valid time is exceeded.

In this embodiment, when the first device is an eNB and the second device is a UE, the first device may determine a priority parameter that needs to be set. When the first device is a UE and the second device is an eNB, the second device may determine a priority parameter that the first device needs to set, and then send the determined priority parameter to the first device. And under the condition that the second equipment sends the priority parameter to the first equipment, the second equipment sends the DCI carrying the priority parameter to the first equipment through the PDCCH. The format of the DCI is different from the format of the existing DCI, and the DCI at least includes an identifier of the first device and a priority parameter.

S603, the first equipment is switched from the LTE system to the WLAN system, and the second equipment is switched from the LTE system to the WLAN system.

S604, the first equipment in the WLAN mode sends a WLAN data packet to the second equipment in the WLAN mode according to the set priority parameter, wherein the WLAN data packet comprises data which are not transmitted completely.

In the method for communicating on the unlicensed frequency band according to the second embodiment, in a scenario where the SAiL device is switched from the LTE system to the WLAN system, the first device in the LTE system performs LTE transmission with the second device in the LTE system, and when there is data that is not completely transmitted in the LTE transmission process and the first device and the second device are to be switched from the LTE system to the WLAN system, the first device sets the priority parameter so that, after the first device and the second device are switched from the LTE system to the WLAN system, the first device can preferentially send a WLAN data packet to the second device compared with other devices in the WLAN system, where the WLAN data packet includes the data that is not completely transmitted in the LTE transmission process, so that the LTE transmission process between the first device and the second device can be completed as soon as possible. Therefore, for a scenario in which the SAiL device is switched from the LTE to the WLAN, the method provided in the second embodiment can solve the problem that the LTE transmission process between the UE and the eNB is incomplete, which further results in a long delay between the UE and the eNB in the existing SAiL technology.

EXAMPLE III

Based on the same inventive concept, the embodiment of the present invention further provides a first device, and the first device may perform the method on the first device side in the method for communicating on the unlicensed frequency band provided in the first embodiment. Referring to fig. 7, the first apparatus 700 includes: a transceiver unit 701 and a processing unit 702. Wherein the content of the first and second substances,

a transceiver 701, configured to receive, when a first device 700 is in a WLAN standard of a wireless local area network, a WLAN data packet sent by a second device in the WLAN standard, where the WLAN data packet includes first information used to instruct the second device to request uplink transmission in an LTE long term evolution standard with the first device 700;

a processing unit 702, configured to determine second information after the transceiver unit 701 receives the first information, where the second information is used to indicate that the second device and the first device 700 are allowed to perform uplink transmission in the LTE scheme, and a resource used by the second device and the first device 700 to perform uplink transmission in the LTE scheme;

the transceiving unit 701 is further configured to send the second information determined by the processing unit 702 to the second device.

In one possible implementation, the processing unit 702 is further configured to:

before the transceiver 701 transmits the second information to the second device, the first device 700 is controlled to switch from the WLAN system to the LTE system;

when the transceiving unit 701 transmits the second information to the second device, it is specifically configured to:

after the processing unit 702 controls the first device 700 to switch to the LTE system, an LTE frame including the second information is sent to the second device in the LTE system.

the processing unit 702 is further configured to:

before the transceiver unit 701 transmits an LTE frame including second information to the second device in the LTE scheme, performing uplink channel estimation according to the LTF field, and calculating a first difference value and a second difference value, where the first difference value is a time difference between occurrence time of the uplink channel estimation and estimated time of the first device 700 transmitting the LTE frame including the second information to the second device, and the second difference value is a difference value between a physical moving speed of the first device 700 and a physical moving speed of the second device;

and predicting a downlink channel according to the uplink channel estimation, the first difference value and the second difference value, where the predicted downlink channel is used for the transceiver unit 701 to transmit an LTE frame including the second information to the second device.

In a possible implementation manner, when the transceiving unit 701 sends the second information to the second device, it is specifically configured to:

when the first device 700 is in the WLAN mode, sending a WLAN data packet including second information to a second device in the WLAN mode;

the processing unit 702 is further configured to:

after the transceiver 701 transmits the second information to the second device, the first device 700 is controlled to switch from the WLAN system to the LTE system.

In one possible implementation, the second information includes resource block allocation information, transmission power control, TPC, and a frequency hopping signal.

It should be noted that, for specific functional descriptions of the above units, reference may be made to a method for communicating on an unlicensed frequency band as shown in fig. 3, and details are not described here again. The division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Based on the same inventive concept, an embodiment of the present invention further provides a first device, where the first device may perform the method on the first device side in the method for communicating on the unlicensed frequency band provided in the first embodiment, and may be the same device as the first device shown in fig. 7. Referring to fig. 8, a first apparatus 800 includes: a processor 801, a transceiver 802, and a memory 803. Wherein the content of the first and second substances,

a processor 801 for reading the program in the memory 803, and executing the following processes:

a processor 801, configured to receive, by a transceiver 802, a WLAN data packet sent by a second device in a WLAN standard when a first device 800 is in the WLAN standard of a wireless local area network, where the WLAN data packet includes first information used to instruct the second device to request uplink transmission in a long term evolution LTE standard with the first device 800;

the processor 801 is further configured to determine, after receiving the first information through the transceiver 802, second information, where the second information is used to indicate that the second device and the first device 800 are allowed to perform uplink transmission in the LTE scheme, and a resource used by the second device and the first device 800 to perform uplink transmission in the LTE scheme;

the processor 801 is further configured to send the determined second information to the second device through the transceiver 802.

In one possible implementation, the processor 801 is further configured to:

before sending the second information to the second device through the transceiver 802, controlling the first device 800 to switch from the WLAN system to the LTE system;

an LTE frame including the second information is transmitted to the second device in the LTE scheme through the transceiver 802.

the processor 801 is further configured to:

before sending an LTE frame including second information to a second device in an LTE system through a transceiver 802, performing uplink channel estimation according to an LTF field, and calculating a first difference value and a second difference value, where the first difference value is a time difference between occurrence time of the uplink channel estimation and estimated time of sending the LTE frame including the second information to the second device by a first device 800, and the second difference value is a difference value between a physical moving speed of the first device 800 and a physical moving speed of the second device;

a downlink channel is predicted based on the uplink channel estimate, the first difference, and the second difference, the predicted downlink channel for transmitting an LTE frame including the second information to the second device via the transceiver 802.

In a possible implementation manner, when the processor 801 sends the second information to the second device through the transceiver 802, the processor is specifically configured to:

when the first device 800 is in the WLAN mode, a WLAN data packet including second information is sent to a second device in the WLAN mode through the transceiver 802;

and controlling the first device 800 to switch from the WLAN system to the LTE system.

Since the first device 800 is an SAiL device and needs to switch between an LTE system and a WLAN system, the transceiver 802 of the first device 800 includes an LTE transceiver and a WLAN transceiver, and the structures of the LTE transceiver and the WLAN transceiver can be seen in fig. 2A and fig. 2B.

The memory 803 may store data used by the processor 801 in performing operations, and the memory 803 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a usb disk, a Secure Digital (SD) card, and the like.

The present embodiment also provides a computer storage medium for storing computer software instructions for the first device in the method provided in the first embodiment, which includes a program designed to execute the first device in the method provided in the first embodiment.

Based on the same inventive concept, the embodiment of the present invention further provides a second device, where the second device may perform the method on the second device side in the method for communicating on the unlicensed frequency band provided in the first embodiment. Referring to fig. 9, the second apparatus 900 includes: a processing unit 901 and a transceiving unit 902. Wherein the content of the first and second substances,

a processing unit 901, configured to determine first information when the second device 900 is in a WLAN system, where the first information is used to instruct the second device 900 to request uplink transmission in a LTE long term evolution system with the first device;

a transceiving unit 902, configured to send a WLAN data packet to a first device in a WLAN mode when the second device 900 is in the WLAN mode, where the WLAN data packet includes the first information determined by the processing unit 901;

the transceiving unit 902 is further configured to receive second information sent by the first device after sending the first information to the first device, where the second information is used to indicate that the second device 900 and the first device are allowed to perform uplink transmission in the LTE scheme, and a resource used by the second device 900 and the first device to perform uplink transmission in the LTE scheme is allowed.

In one possible implementation, the processing unit 901 is further configured to:

before the transceiver unit 902 receives the second information sent by the first device, controlling the second device 900 to switch from the WLAN system to the LTE system;

when receiving the second information sent by the first device, the transceiving unit 902 is specifically configured to:

after the processing unit 901 controls the second device 900 to switch to the LTE system, an LTE frame including second information sent by the first device in the LTE system is received.

In a possible implementation manner, when receiving the second information sent by the first device, the transceiving unit 902 is specifically configured to:

when the second device 900 is in the WLAN mode, receiving a WLAN data packet including second information sent by the first device in the WLAN mode;

the processing unit 901 is further configured to:

after the transceiver unit 902 receives the second information sent by the first device, the second device 900 is controlled to switch from the WLAN system to the LTE system.

Based on the same inventive concept, an embodiment of the present invention further provides a second device, where the second device may perform the method on the second device side in the method for communicating on the unlicensed frequency band provided in the first embodiment, and may be the same device as the second device shown in fig. 9. Referring to fig. 10, the second apparatus 1000 includes: a processor 1001, a transceiver 1002, and a memory 1003. Wherein the content of the first and second substances,

the processor 1001 is configured to read the program in the memory 1003 and execute the following processes:

a processor 1001, configured to determine first information when the second device 1000 is in a WLAN (wireless local area network) system, where the first information is used to instruct the second device 1000 to request uplink transmission in an LTE-Long Term Evolution (LTE) system with the first device;

the processor 1001 is further configured to send, through the transceiver 1002, a WLAN data packet to the first device in the WLAN mode when the second device 1000 is in the WLAN mode, where the WLAN data packet includes the first information determined by the processing unit;

the processor 1001 is further configured to receive, through the transceiver 1002, second information sent by the first device after sending the first information to the first device through the transceiver 1002, where the second information is used to indicate that the second device 1000 and the first device are allowed to perform uplink transmission in the LTE scheme, and resources used by the second device 1000 and the first device to perform uplink transmission in the LTE scheme are allowed.

In one possible implementation, the processor 1001 is further configured to:

before receiving second information sent by the first device through the transceiver 1002, controlling the second device 1000 to switch from the WLAN system to the LTE system;

after controlling the second device 1000 to switch to the LTE standard, the LTE frame including the second information sent by the first device in the LTE standard is received by the transceiver 1002.

In a possible implementation manner, when the processor 1001 receives, through the transceiver 1002, the second information sent by the first device, the processor is specifically configured to:

when the second device 1000 is in the WLAN mode, receiving, by the transceiver 1002, a WLAN data packet including second information sent by the first device in the WLAN mode;

the processor 1001 is further configured to:

after receiving the second information sent by the first device through the transceiver 1002, the second device 1000 is controlled to switch from the WLAN system to the LTE system.

Since the second device 1000 is an SAiL device and needs to switch between an LTE system and a WLAN system, the transceiver 1002 of the second device 1000 includes an LTE transceiver and a WLAN transceiver, and the structures of the LTE transceiver and the WLAN transceiver can be seen in fig. 2A and fig. 2B.

The storage 1003 may store data used by the processor 1001 in performing operations, and the storage 1003 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a usb disk, an SD card, and the like.

The present embodiment also provides a computer storage medium for storing computer software instructions for the second device in the method provided in the first embodiment, which includes a program designed to execute the second device in the method provided in the first embodiment.

By the technical solution provided in the third embodiment, for a scenario that the SAiL device is switched from the WLAN system to the LTE system, since the second device sends, to the first device through the WLAN packet in the WLAN system, the first information, that is, the LTE Transmission Request, for instructing the second device to Request the uplink Transmission in the LTE system with the first device, the first device sends, to the second device through the WLAN packet in the WLAN system, the second information, that is, the second information, is sent to the second device through the LTE frame in the LTE system after the first device and the second device are switched from the WLAN system to the LTE system, where the second information is used for instructing the second device and the first device to be allowed to perform the uplink Transmission in the LTE system, and a resource, that is, the LTE Transmission grant, used by the second device and the first device to perform the uplink Transmission in the LTE system, therefore, in the LTE scheme, the second device may perform uplink Transmission in the LTE scheme with the first device on the resource indicated by the LTE Transmission grant. Therefore, for a scenario in which the SAiL device is switched from the WLAN system to the LTE system, the technical solution provided by the third embodiment can solve the problem that the UE and the eNB in the LTE system cannot perform uplink transmission, thereby causing a large time delay for uplink data transmission between the UE and the eNB in the LTE system.

Example four

Based on the same inventive concept, the embodiment of the present invention further provides a first device, and the first device may perform the method on the first device side in the method for communicating on the unlicensed frequency band provided in the second embodiment. Referring to fig. 11, the first device 1100 includes: a processing unit 1101 and a transceiving unit 1102. Wherein the content of the first and second substances,

a processing unit 1101, configured to perform LTE transmission with a second device in an LTE system through a transceiver unit 1102 when the first device 1100 is in the LTE system for long term evolution;

the processing unit 1101 is further configured to set a priority parameter of the first device 1100 when there is data that is not transmitted in the LTE transmission process and the first device 1100 and the second device are to switch from the LTE scheme to the WLAN scheme, where the set priority parameter indicates that the first device 1100 that is switched to the WLAN scheme preferentially transmits a WLAN packet compared to other devices in the WLAN scheme;

the processing unit 1101 is further configured to control the first device 1100 to switch from the LTE system to the WLAN system;

the transceiving unit 1102 is configured to send a WLAN data packet to a second device in the WLAN system according to the priority parameter set by the first device 1100 after the processing unit 1101 controls the first device 1100 to switch to the WLAN system, where the WLAN data packet includes data that is not transmitted.

In a possible implementation manner, the processing unit 1101, when setting the priority parameter, is specifically configured to:

when the first device 1100 is a base station and the second device is a UE, determining and setting a priority parameter; alternatively, the first and second electrodes may be,

when the first device 1100 is a UE and the second device is a base station, the transceiver unit 1102 receives the priority parameter sent by the second device, and sets the received priority parameter.

inter-frame spacing, transmit power, contention window size, and idle channel estimation for the first device 1100 in the WLAN mode.

Based on the same inventive concept, an embodiment of the present invention further provides a first device, where the first device may perform the method on the first device side in the method for communicating on the unlicensed frequency band provided in the second embodiment, and may be the same device as the first device shown in fig. 11. Referring to fig. 12, the first apparatus 1200 includes: a processor 1201, a transceiver 1202, and a memory 1203. Wherein the content of the first and second substances,

the processor 1201 is used for reading the program in the memory 1203 and executing the following processes:

a processor 1201, configured to perform LTE transmission with a second device in an LTE system through a transceiver 1202 when the first device 1200 is in the LTE system for long term evolution;

the processor 1201 is further configured to set a priority parameter of the first device 1200 when there is data that is not transmitted in the LTE transmission process and the first device 1200 and the second device are to switch from the LTE scheme to the WLAN scheme, where the set priority parameter indicates that the first device 1200 switched to the WLAN scheme preferentially transmits a WLAN packet compared to other devices in the WLAN scheme;

the processor 1201 is further configured to control the first device 1200 to switch from the LTE system to the WLAN system; according to the priority parameter set by the first device 1200, a WLAN packet is sent to the second device in the WLAN mode through the transceiver 1202, where the WLAN packet includes data that is not completed to be transmitted.

In a possible implementation manner, when setting the priority parameter, the processor 1201 is specifically configured to:

when the first device 1200 is a base station and the second device is a UE, determining and setting a priority parameter; alternatively, the first and second electrodes may be,

when the first device 1200 is a UE and the second device is a base station, the transceiver 1202 receives the priority parameter sent by the second device and sets the received priority parameter.

Before setting the priority parameter of the first device 1200, when the first device 1200 is a base station and the second device is a user equipment UE, determining the priority parameter; alternatively, the first and second electrodes may be,

before setting the priority parameter of the first device 1200, when the first device 1200 is a UE and the second device is a base station, the priority parameter sent by the second device is received by the transceiver 1202.

inter-frame spacing, transmit power, contention window size, and idle channel estimation for the first device 1200 in WLAN mode.

Since the first device 1200 is an SAiL device and needs to switch between an LTE system and a WLAN system, the transceiver 1202 of the first device 1200 includes an LTE transceiver and a WLAN transceiver, and the structures of the LTE transceiver and the WLAN transceiver can be seen in fig. 2A and fig. 2B.

The memory 1203 may store data used by the processor 1201 in performing operations, and the memory 1203 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a usb disk, an SD card, and the like.

The present embodiment further provides a computer storage medium for storing computer software instructions for the first device in the method provided in the second embodiment, which includes a program designed to execute the first device in the method provided in the second embodiment.

Based on the same inventive concept, the embodiment of the present invention further provides a second device, and the second device may perform the method on the second device side in the method for communicating on the unlicensed frequency band provided in the second embodiment. Referring to fig. 13, the second apparatus 1300 includes: a processing unit 1301 and a transceiving unit 1302. Wherein the content of the first and second substances,

a processing unit 1301, configured to perform LTE transmission with a first device in an LTE system through a transceiving unit 1302 when the second device 1300 is in the LTE system;

the processing unit 1301 is further configured to control the second device 1300 to switch from the LTE system to the WLAN system;

a transceiving unit 1302, configured to receive, after the processing unit 1301 controls the second device 1300 to switch to the WLAN standard, a WLAN data packet sent by the first device in the WLAN standard after setting the priority parameter, where the WLAN data packet includes data that is not transmitted in the LTE transmission process, and the set priority parameter indicates that the first device switched to the WLAN standard preferentially sends the WLAN data packet compared to other devices in the WLAN standard.

In one possible implementation, the transceiving unit 1302 is further configured to:

before receiving a WLAN data packet sent by a first device in a WLAN system after setting a priority parameter, when the first device is a UE and the second device 1300 is a base station, sending the priority parameter to the first device.

the method comprises the steps of inter-frame space, transmitting power, contention window size and idle channel estimation of first equipment in a WLAN mode.

Based on the same inventive concept, an embodiment of the present invention further provides a second device, where the second device may perform the method on the second device side in the method for communicating on the unlicensed frequency band provided in the second embodiment, and may be the same device as the second device shown in fig. 13. Referring to fig. 14, the first apparatus 1400 includes: a processor 1401, a transceiver 1402, and a memory 1403. Wherein the content of the first and second substances,

a processor 1401 for reading a program in the memory 1403, and performing the following processes:

a processor 1401, configured to perform LTE transmission with a first device in an LTE system through a transceiver 1402 when a second device 1400 is in the LTE system;

the processor 1401 is further configured to control the second device 1400 to switch from the LTE system to the WLAN system; the method comprises the steps that a WLAN data packet sent by first equipment in a WLAN mode after priority parameters are set is received through a transceiver 1402, the WLAN data packet comprises data which are not transmitted in the LTE transmission process, and the set priority parameters indicate that the first equipment switched to the WLAN mode preferentially sends the WLAN data packet compared with other equipment in the WLAN mode.

In one possible implementation, the processor 1401 is further configured to:

before receiving, by the transceiver 1402, a WLAN packet sent by the first device in the WLAN mode after setting the priority parameter, when the first device is a UE and the second device 1400 is a base station, the priority parameter is sent to the first device by the transceiver 1402.

Since the second device 1400 is a SAiL device and needs to switch between an LTE system and a WLAN system, the transceiver 1402 of the second device 1400 includes an LTE transceiver and a WLAN transceiver, and the structures of the LTE transceiver and the WLAN transceiver can be seen in fig. 2A and fig. 2B.

The memory 1403 may store data used by the processor 1401 in performing operations, and the memory 1403 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a usb disk, an SD card, and the like.

According to the technical scheme provided by the fourth embodiment, in a scenario that the SAiL device is switched from the LTE system to the WLAN system, the first device in the LTE system and the second device in the LTE system perform LTE transmission, and when there is data that is not completely transmitted in the LTE transmission process and the first device needs to be sent to the second device, and the first device and the second device are to be switched from the LTE system to the WLAN system, the first device sets the priority parameter so that the first device can preferentially send a WLAN data packet to the second device after the first device and the second device are switched from the LTE system to the WLAN system, compared with other devices in the WLAN system, the WLAN data packet includes the data that is not completely transmitted in the LTE transmission process, and thus the LTE transmission process between the first device and the second device can be completed as soon as possible. Therefore, for a scenario in which the SAiL device is switched from the LTE system to the WLAN system, the technical solution provided by the fourth embodiment can solve the problem that the LTE transmission process between the UE and the eNB is incomplete, which further results in a large time delay in the LTE transmission process between the UE and the eNB in the existing SAiL technology.

A computer storage medium is also provided in this embodiment, and is used to store computer software instructions for the second device in the method provided in the second embodiment, and the computer software instructions include a program designed to execute the second device in the method provided in the second embodiment.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of communicating over an unlicensed frequency band, comprising:

a first device in a WLAN mode receives a WLAN data packet sent by a second device in the WLAN mode, wherein the WLAN data packet comprises first information used for indicating the second device to request uplink transmission in a Long Term Evolution (LTE) mode with the first device; the WLAN data packet also comprises a long training LTF field;

the first device sends second information to the second device, where the second information is used to indicate that the second device and the first device are allowed to perform uplink transmission in an LTE scheme, and resources used by the second device and the first device to perform uplink transmission in the LTE scheme;

before the first device sends the second information to the second device, the method further includes: the first equipment is switched to an LTE system from a WLAN system, and the second equipment is switched to the LTE system from the WLAN system;

the first device sends second information to the second device, including: the first equipment in the LTE system sends an LTE frame comprising the second information to the second equipment in the LTE system;

before the first device in the LTE standard sends the LTE frame including the second information to the second device in the LTE standard, the method further includes:

the first device performs uplink channel estimation according to the LTF field, and calculates a first difference value and a second difference value, wherein the first difference value is a time difference between occurrence time of the uplink channel estimation and estimated time of the first device sending the LTE frame including the second information to the second device, and the second difference value is a difference value between a physical moving speed of the first device and a physical moving speed of the second device;

2. The method of claim 1, wherein the first device sending the second information to the second device comprises:

after the first device sends the second information to the second device, the method further includes:

the first equipment is switched to the LTE system from the WLAN system, and the second equipment is switched to the LTE system from the WLAN system.

3. The method of claim 2, wherein the second information included in the WLAN data packet includes resource block allocation information, transmission power control, TPC, and frequency hopping signals.

4. A method of communicating over an unlicensed frequency band, comprising:

the method comprises the steps that second equipment in a WLAN mode sends a WLAN data packet to first equipment in the WLAN mode, wherein the WLAN data packet comprises first information used for indicating the second equipment to request uplink transmission with the first equipment in a Long Term Evolution (LTE) mode; the WLAN data packet also comprises a long training LTF field;

the second device receives second information sent by the first device, where the second information is used to indicate that the second device and the first device are allowed to perform uplink transmission in an LTE scheme, and resources used by the second device and the first device to perform uplink transmission in the LTE scheme;

before the second device receives the second information sent by the first device, the method further includes: the second equipment is switched to the LTE system from the WLAN system, and the first equipment is switched to the LTE system from the WLAN system;

the second device receives the second information sent by the first device, and the second information includes: the second equipment in the LTE system receives an LTE frame which is sent by the first equipment in the LTE system and comprises the second information; before the first device in the LTE system sends the LTE frame including the second information to the second device in the LTE system, the first device performs uplink channel estimation according to the LTF field, calculates a first difference and a second difference, and predicts a downlink channel according to the uplink channel estimation, the first difference, and the second difference, where the predicted downlink channel is used for the first device to send to the second device; the first difference is a time difference between an occurrence time of uplink channel estimation and a time estimated for the first device to send the LTE frame including the second information to the second device, and the second difference is a difference between a physical moving speed of the first device and a physical moving speed of the second device.

5. The method of claim 4, wherein the second device receiving the second information sent by the first device comprises:

after the second device receives the second information sent by the first device, the method further includes:

the second equipment is switched to the LTE system from the WLAN system, and the first equipment is switched to the LTE system from the WLAN system.

6. The method of claim 5, wherein the second information included in the WLAN packet comprises resource block allocation information, transmission power control, and frequency hopping signals.

7. A method of communicating over an unlicensed frequency band, comprising:

8. The method of claim 7, wherein when the first device is a base station and the second device is a User Equipment (UE), the first device sets a priority parameter comprising:

determining and setting, by the first device, the priority parameter; or

9. The method according to claim 7 or 8, wherein the priority parameter comprises one or a combination of the following parameters:

10. A method of communicating over an unlicensed frequency band, comprising:

11. The method of claim 10, wherein before the second device in the WLAN mode receives the WLAN packet sent by the first device in the WLAN mode after setting the priority parameter, further comprising:

and when the first equipment is UE and the second equipment is a base station, the second equipment sends the priority parameter to the first equipment.

12. The method according to claim 10 or 11, wherein the priority parameter comprises one or a combination of the following parameters:

13. A first device, comprising:

a transceiver unit, configured to receive, when the first device is in a WLAN standard of a wireless local area network, a WLAN data packet sent by a second device in the WLAN standard, where the WLAN data packet includes first information used to instruct the second device to request uplink transmission in an LTE long term evolution standard with the first device; the WLAN data packet also comprises a long training LTF field;

the transceiver unit is further configured to send the second information determined by the processing unit to the second device;

the processing unit is further to: before the transceiver unit sends the second information to the second device, controlling the first device to switch from a WLAN mode to an LTE mode;

when the transceiver unit sends the second information to the second device, the transceiver unit is specifically configured to: after the processing unit controls the first device to switch to the LTE system, sending an LTE frame including the second information to the second device in the LTE system;

the processing unit is further to: before the transceiver unit sends an LTE frame including the second information to the second device in an LTE scheme, performing uplink channel estimation according to the LTF field, and calculating a first difference value and a second difference value, where the first difference value is a time difference between an occurrence time of the uplink channel estimation and an estimated time when the first device sends the LTE frame including the second information to the second device, and the second difference value is a difference value between a physical moving speed of the first device and a physical moving speed of the second device;

14. The first device according to claim 13, wherein the transceiver unit, when sending the second information to the second device, is specifically configured to:

the processing unit is further to:

15. The first apparatus of claim 14, wherein the second information comprises resource block allocation information, transmit power control, TPC, and frequency hopping signals.

16. A second apparatus, comprising:

the processing unit is used for determining first information when the second equipment is in a Wireless Local Area Network (WLAN) mode, wherein the first information is used for indicating the second equipment to request uplink transmission with the first equipment in a Long Term Evolution (LTE) mode; the WLAN data packet also comprises a long training LTF field;

the transceiver unit is further configured to receive second information sent by the first device after sending the first information to the first device, where the second information is used to indicate that the second device and the first device are allowed to perform uplink transmission in an LTE scheme, and a resource used by the second device and the first device to perform uplink transmission in the LTE scheme;

the processing unit is further to: before the transceiver unit receives the second information sent by the first device, controlling the second device to switch from a WLAN mode to an LTE mode;

when receiving the second information sent by the first device, the transceiver unit is specifically configured to: after the processing unit controls the second device to switch to the LTE system, receiving an LTE frame which is sent by the first device under the LTE system and comprises the second information; before the first device in the LTE system sends the LTE frame including the second information to the second device in the LTE system, the first device performs uplink channel estimation according to the LTF field, calculates a first difference and a second difference, and predicts a downlink channel according to the uplink channel estimation, the first difference, and the second difference, where the predicted downlink channel is used for the first device to send to the second device; the first difference is a time difference between an occurrence time of uplink channel estimation and a time estimated for the first device to send the LTE frame including the second information to the second device, and the second difference is a difference between a physical moving speed of the first device and a physical moving speed of the second device.

17. The second device according to claim 16, wherein the transceiver unit, when receiving the second information sent by the first device, is specifically configured to:

the processing unit is further to:

18. The second device of claim 17, wherein the second information comprises resource block allocation information, transmission power control, and frequency hopping signals.

19. A first device, comprising:

the transceiver unit is configured to send a WLAN data packet to the second device in the WLAN standard according to the priority parameter set by the first device after the processing unit controls the first device to switch to the WLAN standard, where the WLAN data packet includes the data that is not transmitted.

20. The first device of claim 19, wherein the processing unit, when setting the priority parameter, is specifically configured to:

21. The first apparatus of claim 19 or 20, wherein the priority parameters comprise one or a combination of the following parameters:

22. A second apparatus, comprising:

23. The second device of claim 22, wherein the transceiver unit is further configured to:

24. The second device of claim 22 or 23, wherein the priority parameters comprise one or a combination of the following parameters: