WO2016197825A1

WO2016197825A1 - Method, device and system for using unlicensed spectrum to perform communication

Info

Publication number: WO2016197825A1
Application number: PCT/CN2016/083398
Authority: WO
Inventors: 李娜; 陈卓
Original assignee: 中国移动通信集团公司
Priority date: 2015-06-09
Filing date: 2016-05-26
Publication date: 2016-12-15
Also published as: CN106255206A

Abstract

Provided are a method, device and system for using an unlicensed spectrum to perform communication. The method for using an unlicensed spectrum to carry out communication which is applied to serving base stations comprises: before a serving base station performs data exchange with a user terminal via an uplink channel of an unlicensed spectrum, the serving base station monitoring the uplink channel; when the uplink channel is idle, the serving base station utilizing a pre-set sub-frame to send a control frame to surrounding LAA equipment, so that other LAA equipment apart from the user terminal can determine whether to occupy the uplink channel according to the control frame, wherein the control frame at least comprises a physical address of the serving base station and a first reserved duration of the uplink channel; and within the first reserved duration, the serving base station receiving data which are sent by the user terminal via the uplink channel.

Description

Method, device and system for communicating using unlicensed spectrum

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201510313624.3, filed on Jun. 9, 2015, the entire content of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of mobile communications, and more particularly to a method, apparatus and system for communicating using an unlicensed spectrum.

Background technique

With the development of LTE (Long Term Evolution), the demand for wireless broadband data is becoming more and more obvious. The scarce spectrum resources are undoubtedly a major factor restricting LTE. In order to meet the growing needs of people, expanding system bandwidth is an effective method. Therefore, the LSA (Licensed-Assisted Access) solution came into being.

The LAA concept is based on the LTE network platform, which aggregates unlicensed frequency bands into LTE. In the LAA mechanism, mobile communication transmissions can be carried on unlicensed spectrum, such as the 5 GHz frequency band. The LAA solution is mainly applied to the small station scenario, that is, the LTE-related spectrum is used as the primary carrier, the unlicensed spectrum is used as the secondary carrier, and the primary and secondary carriers are jointly served by the carrier to provide services for users. The increase of available bandwidth makes the user data rate requirement Guarantee.

The LAA system needs to ensure that the data transmission on the unlicensed carrier meets the regulatory requirements of the unlicensed band. For example, LBT (listen before talk) technology must be used to ensure the channel is idle before transmitting data. The main idea of LBT technology is that the base station to transmit data first monitors whether there is a carrier on the channel to determine whether another base station uses the channel to transmit data. If the channel is idle, the base station can transmit data; otherwise, the base station will evade it for a while before attempting.

In the LAA system, different operators share the same unlicensed spectrum. Because there is no negotiation between the different operators on how to use the shared unlicensed spectrum, there are many hidden nodes in the LAA system and are in the LAA uplink transmission process. As shown in FIG. 1 , the hidden node includes not only the unscheduled UE (User Equipment) but also the LAA eNB (Evolved Node B) and the UE of the different operator, and even includes other uses. The 802.11 device that authorizes the spectrum, so the uplink interference is more complicated, which will inevitably lead to unreliable reception of data.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide a method, a device and a system for communicating using an unlicensed spectrum, which can ensure that there is no interference caused by other LAA devices around the receiving end within the reserved duration, and the other LAA devices are reduced in uplink. The impact of data reception ensures reliable reception of uplink data.

To solve the above technical problem, the embodiments of the present disclosure provide the following technical solutions:

In one aspect, a method for communicating using an unlicensed spectrum for serving a base station is provided, the method comprising:

Before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum, the serving base station monitors the uplink channel;

When the uplink channel is idle, the serving base station sends a control frame to the surrounding LAA device by using a preset subframe, so that other LAA devices except the user terminal determine whether to occupy the uplink channel according to the control frame. The control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

The serving base station receives data sent by the user terminal through the uplink channel during the first reserved duration.

Further, the preset subframe is a subframe located at an LTE uplink and downlink transition point, and the subframe includes three parts: a DwPTS, a GP, and an UpPTS, and the serving base station sends a control frame to the surrounding LAA device, including:

The serving base station transmits a control frame to the surrounding LAA device in the DwPTS portion.

Further, when the serving base station further includes a WiFi module, the method further includes:

After the serving base station sends a control frame preset time period to the surrounding LAA device by using the preset subframe, the serving base station sends a CTS (Allow to Send) frame to the surrounding WiFi device by using the preset subframe, where the CTS frame is used. At least the physical address of the serving base station and the first reserved duration of the uplink channel are included.

Further, the preset time period has a length of 16 μs or 10 μs.

An embodiment of the present disclosure further provides a method for communicating using an unlicensed spectrum for a user terminal, where the method includes:

Before the user terminal performs data interaction with the serving base station through the uplink channel of the unlicensed spectrum, the user terminal receives the control that the serving base station sends to the surrounding LAA device by using the preset subframe. a frame, where the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

The user terminal monitors the uplink channel;

When the uplink channel is idle, the user terminal sends data to the serving base station through the uplink channel within the first reserved duration.

Further, the preset subframe is a subframe located at an LTE uplink and downlink transition point, and the subframe includes three parts: a DwPTS, a GP, and an UpPTS, and the user terminal monitoring the uplink channel includes:

The user terminal monitors the uplink channel in the GP part; or

The user terminal monitors the uplink channel in the UpPTS part; or

The user terminal monitors the uplink channel in the GP and UpPTS sections.

Further, the user terminal is configured to monitor the uplink channel in the GP part, and after determining that the uplink channel is idle, the method further includes:

The user terminal sends a response frame to the serving base station in the UpPTS part, where the response frame includes at least a second reserved duration of the uplink channel and/or a physical address of the serving base station, and the second pre- The length of stay is the length of time required for the user terminal to send a response frame to send all data to the serving base station;

The sending, by the user terminal, the data to the serving base station includes:

After transmitting the response frame, the user terminal sends data to the serving base station through the uplink channel within the second reserved duration.

An embodiment of the present disclosure further provides an apparatus for communicating using an unlicensed spectrum for serving a base station, where the apparatus includes:

The monitoring module is configured to monitor the uplink channel before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum;

a sending module, configured to send, by using a preset subframe, a control frame to the surrounding LAA device when the uplink channel is idle, so that other LAA devices except the user terminal determine whether to occupy the uplink according to the control frame. Channel, the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

a receiving module, configured to receive, by the user terminal, the The data sent by the line channel.

Further, the preset subframe is a subframe located at an uplink and downlink transition point of the LTE, and the subframe includes three parts: a DwPTS, a GP, and an UpPTS.

The sending module is specifically configured to send a control frame to the surrounding LAA device in the DwPTS part.

Further, when the serving base station further includes a WiFi module,

The sending module is further configured to send a CTS frame to the surrounding WiFi device by using a preset subframe after the control frame is sent to the surrounding LAA device by using the preset subframe, where the CTS frame includes at least the service. The physical address of the base station and the first reserved duration of the uplink channel.

An embodiment of the present disclosure further provides an apparatus for communicating using an unlicensed spectrum for a user terminal, where the apparatus includes:

a receiving module, configured to receive, before the user terminal performs data interaction with the serving base station by using an uplink channel of the unlicensed spectrum, a control frame sent by the serving base station to the surrounding LAA device by using a preset subframe, where the control frame includes at least the foregoing a physical address of the serving base station and a first reserved duration of the uplink channel;

a monitoring module, configured to monitor the uplink channel;

And a sending module, configured to send data to the serving base station by using the uplink channel during the first reserved duration when the uplink channel is idle.

The monitoring module is specifically configured to monitor the uplink channel in the GP part; or

Listening to the upstream channel in the UpPTS portion; or

The upstream channel is monitored at the GP and UpPTS portions.

Further, the monitoring module monitors the uplink channel in the GP part, and determines that the uplink channel is idle;

The sending module is further configured to send, in the UpPTS part, a response frame to the serving base station, where the response frame includes at least a second reserved duration of the uplink channel and/or a physical address of the serving base station, The second reserved duration is a duration required for the user terminal to send a response frame to all data sent to the serving base station, and after transmitting the response frame, within the second reserved duration Transmitting data to the serving base station over the uplink channel.

Embodiments of the present disclosure also provide a system for communicating using an unlicensed spectrum, including:

The serving base station is configured to monitor the uplink channel before performing data interaction with the user terminal through the uplink channel of the unlicensed spectrum, and send a control frame to the surrounding LAA device when the uplink channel is idle, so as to remove the The other LAA device outside the user terminal determines whether to occupy the uplink channel according to the control frame, where the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

The user terminal is configured to receive the control frame sent by the serving base station, and monitor the uplink channel, and when the uplink channel is idle, pass the uplink channel in the first reserved duration. Sending data to the serving base station.

Embodiments of the present disclosure have the following beneficial effects:

In the foregoing solution, before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum, the serving base station monitors the uplink channel, and sends a control frame to the surrounding access LAA device when the uplink channel is idle. The frame includes at least the physical address of the serving base station and the reserved duration of the uplink channel, so as to notify other LAA devices other than the user terminal not to occupy the uplink channel within the reserved duration, thereby avoiding interference between different operators, and ensuring that the frame is pre-empted. The interference caused by other LAA devices does not exist around the serving base station in the remaining time period, and the uplink data of the user terminal to the serving base station is reliably received.

DRAWINGS

1 is a schematic diagram of a hidden node in an uplink transmission process of a related art LAA system;

2 is a schematic flowchart of a method for a serving base station to communicate using an unlicensed spectrum according to an embodiment of the present disclosure;

3 is a schematic flowchart of a method for a user terminal to communicate using an unlicensed spectrum according to an embodiment of the present disclosure;

4 is a schematic diagram of communication using an unlicensed spectrum according to a specific embodiment of the present disclosure;

5 and FIG. 6 are schematic diagrams showing communication using an unlicensed spectrum according to a second embodiment of the present disclosure;

7 and FIG. 8 are schematic diagrams showing communication using an unlicensed spectrum according to a third embodiment of the present disclosure.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present disclosure more clear, The detailed description will be made in conjunction with the drawings and specific embodiments.

The embodiments of the present disclosure are directed to the related art LAA system, which has many hidden nodes, causing unreliable reception of uplink data, and provides a method, device, and system for communicating using an unlicensed spectrum, which can ensure reception within a reserved time period. There is no interference caused by other LAA devices around the terminal, which reduces the impact of other LAA devices on uplink data reception and ensures reliable reception of uplink data.

The present disclosure provides a method for communicating using an unlicensed spectrum for serving a base station. As shown in FIG. 2, the method includes:

Step 101: The serving base station monitors the uplink channel before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum.

Step 102: When the uplink channel is idle, the serving base station sends a control frame to the surrounding LAA device by using a preset subframe, so that other LAA devices except the user terminal determine whether to occupy the device according to the control frame. An uplink channel, where the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

Step 103: The serving base station receives data sent by the user terminal through the uplink channel, within the first reserved duration.

In the technical solution of the present disclosure, the serving base station monitors the uplink channel before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum, and sends a control frame to the surrounding access LAA device when the uplink channel is idle. The control frame includes at least a physical address of the serving base station and a reserved duration of the uplink channel, so as to notify other LAA devices other than the user terminal not to occupy the uplink channel within the reserved duration, thereby avoiding interference between different operators. It is ensured that there is no interference caused by other LAA devices around the serving base station within the reserved duration, and the uplink data of the user terminal to the serving base station is reliably received.

Further, the preset subframe is a subframe located at an uplink and downlink transition point of the LTE, and the subframe includes a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an uplink. The uplink time slot (Uplink Pilot Time Slot, UpPTS), where the serving base station sends a control frame to the surrounding LAA device includes:

The serving base station sends a control frame to the surrounding LAA device in the DwPTS part, and uses the special subframe to send a control frame, which can occupy communication resources as little as possible.

After the serving base station sends the control frame to the surrounding LAA device for a preset time period by using the preset subframe, the serving base station sends a CTS (Clear To Send) frame to the surrounding WiFi device by using the preset subframe, where the CTS is used. The frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel. This can further ensure that there is no interference caused by the WiFi device around the receiving end within the reserved duration, reduce the impact of the WiFi device on the uplink data reception, and ensure reliable reception of the uplink data.

Further, in the 802.11a system, the preset time period may be 16 μs in length; in the 802.11b system, the preset time period may be 10 μs in length.

The present disclosure also provides a method for communicating using an unlicensed spectrum for a user terminal. As shown in FIG. 3, the method includes:

Step 201: Before the user terminal performs data interaction with the serving base station by using the uplink channel of the unlicensed spectrum, the user terminal receives a control frame sent by the serving base station to the surrounding LAA device by using a preset subframe, where the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

Step 202: The user terminal monitors the uplink channel.

Step 203: When the uplink channel is idle, the user terminal sends data to the serving base station through the uplink channel within the first reserved duration.

Since the serving base station has previously sent a control frame to the surrounding access LAA device, the control frame includes at least the physical address of the serving base station and the reserved duration of the uplink channel. Therefore, other LAA devices except the user terminal are not within the reserved duration. The uplink channel is occupied, thereby avoiding interference between different operators, ensuring that there is no interference caused by other LAA devices around the serving base station within the reserved duration, and realizing reliable reception of uplink data from the user terminal to the serving base station.

The user terminal monitors the uplink channel in the GP part; or

The user terminal monitors the uplink channel in the UpPTS part; or

The user terminal monitors the uplink channel in the GP and UpPTS portions, and the user terminal uses the special subframe to perform monitoring, and can occupy communication resources as little as possible.

Further, the user terminal monitors the uplink channel in the GP part, After the uplink channel is idle, the method further includes:

The user terminal sends a response frame to the serving base station. First, in response to the control frame sent by the serving base station, the serving base station is notified that it is ready to send uplink data on the uplink channel. Second, the hidden node problem around the user terminal is avoided, and the problem is further reduced. Interference during this upstream data transmission. The second reserved duration is not greater than the first reserved duration.

The present disclosure also provides an apparatus for communicating using an unlicensed spectrum for serving a base station, the apparatus comprising:

And a receiving module, configured to receive data sent by the user terminal by using the uplink channel, within the first reserved duration.

The sending module is specifically configured to send a control frame to the surrounding LAA device in the DwPTS part. The serving base station uses the special subframe to send control frames, which can occupy communication resources as little as possible.

Further, when the serving base station further includes a WiFi module,

The sending module is further configured to: after sending the control frame preset time period to the surrounding LAA device by using the preset subframe, send a CTS frame to the surrounding WiFi device by using the preset subframe, where the CTS frame includes at least Describe the physical address of the serving base station and the first reserved duration of the uplink channel. This can further ensure that there is no interference caused by the WiFi device around the receiving end within the reserved duration, reduce the impact of the WiFi device on the uplink data reception, and ensure reliable reception of the uplink data.

The present disclosure also provides an apparatus for communicating using an unlicensed spectrum for a user terminal, the apparatus comprising:

a monitoring module, configured to monitor the uplink channel;

Listening to the upstream channel in the UpPTS portion; or

The upstream channel is monitored at the GP and UpPTS portions. The user terminal uses the special subframe to perform monitoring, and can occupy communication resources as little as possible.

Further, the listening module monitors the uplink channel in the GP part, and determines that the uplink channel is idle; the sending module is further configured to send a response frame to the serving base station in the UpPTS part, The response frame includes at least a second reserved duration of the uplink channel and/or a physical address of the serving base station, where the second reserved duration is that the user terminal sends a response frame to the serving base station. The length of time required for all data, and after transmitting the response frame, transmits data to the serving base station through the uplink channel within the second reserved duration.

The present disclosure also provides a system for communicating using an unlicensed spectrum, including:

The method for communicating using the unlicensed spectrum of the present disclosure will be further described below with reference to the accompanying drawings and specific embodiments:

Embodiment 1

In order to occupy unnecessary resources as little as possible, the embodiment uses a special subframe in LTE to send a control frame to avoid occupying unnecessary communication resources. The special subframe of LTE is located at the uplink and downlink transition point and includes three parts: DwPTS, GP and UpPTS. The DwPTS is the last downlink resource, and the UpPTS is the earliest uplink resource. The serving base station (LAA eNB) can transmit unnecessary control resources in the DwPTS part as little as possible.

As shown in FIG. 4, the LAA eNB first listens to the uplink channel in the DwPTS part, and when the uplink channel is idle, the LAA eNB sends a control frame to the LAA device including the user terminal (UE) in the DwPTS part, the control frame is at least Including the physical address of the LAA eNB and the reserved duration of the uplink channel, after receiving the control frame, the LAA device may determine the uplink channel to be occupied by the LAA eNB according to the physical address of the LAA eNB, or may directly include the control frame in the control frame. The upstream channel that the LAA eNB will occupy. The reserved duration of the uplink channel is determined by the LAA eNB in consideration of all scheduled UEs.

The transmitting end, that is, the scheduled UE, after receiving the control frame, monitors the uplink channel in the GP part and the UpPTS part. If the uplink channel is idle, the UE considers that it can send data to the receiving end (ie, the LAA eNB) on the uplink channel. During the time period corresponding to the reserved duration, the UE will send uplink data to the LAA eNB through the uplink channel; if the uplink channel is busy, the UE temporarily does not send uplink data to the LAA eNB, and the UE continues to monitor the uplink channel and is listening. After the uplink channel is idle, the uplink data is sent to the LAA eNB.

After receiving the control frame, the other LAA devices (including other LAA eNBs and unscheduled UEs) cannot send any data on the uplink channel in the time period corresponding to the reserved duration in the control frame, thus ensuring the reservation. There is no interference caused by other LAA devices around the receiving end in the duration, which reduces the impact of other LAA devices on uplink data reception and ensures reliable reception of uplink data.

Embodiment 2

In order to occupy unnecessary resources as little as possible, the embodiment uses a special subframe in LTE to send a control frame to avoid occupying unnecessary communication resources. The special subframe of LTE is located at the uplink and downlink transition point and includes three parts: DwPTS, GP and UpPTS. DwPTS is the last piece of downlink resources. The UpPTS is the earliest uplink resource, and the serving base station (LAA eNB) can transmit unnecessary control resources in the DwPTS part as much as possible.

As shown in FIG. 5, the LAA eNB first listens to the uplink channel in the DwPTS part. When the uplink channel is idle, the LAA eNB sends a control frame to the LAA device including the user terminal (UE) in the DwPTS part, the control frame is at least Including the physical address of the LAA eNB and the reserved duration of the uplink channel, after receiving the control frame, the LAA device may determine the uplink channel to be occupied by the LAA eNB according to the physical address of the LAA eNB, or may directly include the control frame in the control frame. The upstream channel that the LAA eNB will occupy. The reserved duration of the uplink channel is determined by the LAA eNB in consideration of all scheduled UEs.

The transmitting end, that is, the scheduled UE, after receiving the control frame, monitors the uplink channel in the GP part. If the uplink channel is idle, the UE considers that it can send data to the receiving end (ie, the LAA eNB) on the uplink channel, and the UE is in the UpPTS. Partially, the response frame is fed back to the LAA eNB. Although the protocol specifies that the UpPTS part is only used to transmit the SRS (probe reference signal) and the PRACH (physical random access channel), the RB (resource block) reserved by the serving base station to the PRACH is not prohibited. ) scheduling other uplink data. The UE sends a response frame to the LAA eNB. First, as a response to the control frame sent by the LAA eNB, the LAA eNB is informed that it is ready to send uplink data on the uplink channel. Second, the hidden node problem around the UE is avoided, and further reduced here. Interference during the secondary uplink data transmission. Sending a response frame in the UpPTS part can preempt the uplink resources as early as possible to ensure timely transmission of uplink data. Then, within a time period corresponding to the reserved duration, the UE will send uplink data to the LAA eNB through the uplink channel.

As shown in FIG. 6, after receiving the control frame, the UE monitors the uplink channel, and if the uplink channel is busy, the UE temporarily does not send a response frame to the LAA eNB, and the UE continues to monitor the uplink channel after a period of time. After the uplink channel is idle, the response frame is sent to the LAA eNB, and then the UE sends the uplink data to the LAA eNB through the uplink channel in the time period corresponding to the reserved duration.

Embodiment 3

In the 802.11g standard, a CTS-to-self protection mechanism is proposed. In a hybrid network, when an 802.11g base station is ready to occupy a channel, it first updates the network allocation vector (NAV) values of other base stations. It sends a CTS frame so that the receiving address is equal to its own physical address. The duration information contained in the CTS frame indicates the time when the channel is about to be occupied. Other base stations that can detect the CTS frame update their NAV values accordingly, thereby avoiding collisions.

If the LAA eNB has a WiFi module, it can send a CTS frame after the control frame is sent to inform the surrounding 802.11 base station not to send data on the uplink channel for a reserved time period, thereby avoiding the 802.11 base station bringing the uplink data transmission. interference. A CTS frame is a frame commonly used in an 802.11 system, and may include a physical address of a LAA eNB that transmits a CTS frame and a reserved duration of the uplink channel. The CTS frame in this embodiment is different from the CTS frame in the 802.11 system in that the CTS frame in the 802.11 system is usually sent by the transmitting end, so as to avoid the problem of inter-base station collision; and the CTS here is sent by the receiving end LAA eNB. The purpose is to avoid interference caused by neighboring base stations.

As shown in FIG. 7, the LAA eNB first listens to the uplink channel in the DwPTS part. When the uplink channel is idle, the LAA eNB sends a control frame to the LAA device including the user terminal (UE) in the DwPTS part, the control frame is at least Including the physical address of the LAA eNB and the reserved duration of the uplink channel, after receiving the control frame, the LAA device may determine the uplink channel to be occupied by the LAA eNB according to the physical address of the LAA eNB, or may directly include the control frame in the control frame. The upstream channel that the LAA eNB will occupy. The reserved duration of the uplink channel is determined by the LAA eNB in consideration of all scheduled UEs.

The LAA eNB then transmits a CTS frame to the surrounding 802.11 base station, and the time interval between the control frame and the CTS frame is a predetermined value. To ensure that CTS frames are transmitted with higher priority, SIFS (Short Inter-frame space) matching 802.11 can be used as the interframe space between the control frame and the CTS frame. As shown in FIG. 8, UE1, UE2, and UE3 are located in the 802.11a system. Then SIFS1=SIFS2=SIFS3=16 μs.

As shown in FIG. 7, the transmitting end, that is, the scheduled UE, after receiving the control frame, monitors the uplink channel in the GP part and the UpPTS part. If the uplink channel is idle, the UE considers that it can go to the receiving end on the uplink channel (ie, The LAA eNB transmits data, and the UE will send uplink data to the LAA eNB during the time period corresponding to the reserved duration; if the uplink channel is busy, the UE temporarily does not send uplink data to the LAAeNB, and the UE continues to monitor the uplink channel, and After the uplink channel is idle, the uplink data is sent to the LAA eNB.

After receiving the control frame, the other LAA devices (including other LAA eNBs and unscheduled UEs) cannot send any data on the uplink channel in the time period corresponding to the reserved duration in the control frame, and other WiFi devices are receiving. After the CTS frame, no data can be sent on the uplink channel in the time period corresponding to the reserved duration in the CTS frame, thus ensuring that no other LAA devices and WiFi devices are present around the receiving end within the reserved duration. Interference, reduce the impact of other LAA devices and WiFi devices on uplink data reception, and ensure reliable reception of uplink data.

Many of the functional components described in this specification are referred to as modules to more particularly emphasize the independence of their implementation.

In embodiments of the present disclosure, modules may be implemented in software for execution by various types of processors. For example, an identified executable code module can comprise one or more physical or logical blocks of computer instructions, which can be constructed, for example, as an object, procedure, or function. Nevertheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different physicalities. When these instructions are logically combined, they constitute a module and achieve the specified purpose of the module. .

In practice, the executable code module can be a single instruction or a plurality of instructions, and can even be distributed across multiple different code segments, distributed among different programs, and distributed across multiple memory devices. As such, operational data may be identified within the modules and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed at different locations (including on different storage devices), and may at least partially exist as an electronic signal on a system or network.

When the module can be implemented by software, considering the level of the existing hardware process, the module that can be implemented by software can be constructed by a person skilled in the art without considering the cost. The hardware circuitry to implement the corresponding functions, including conventional Very Large Scale Integration (VLSI) circuits or gate arrays, and existing semiconductors such as logic chips, transistors, or other discrete components. The modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

In the method embodiments of the present disclosure, the sequence numbers of the steps are not used to limit the sequence of steps. For those skilled in the art, the steps of the steps are changed without any creative work. It is also within the scope of the disclosure.

The above is an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present disclosure. It should also be considered as the scope of protection of the present disclosure.

Claims

A method for communicating using an unlicensed spectrum for serving a base station, wherein the method includes:

Before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum, the serving base station monitors the uplink channel;

When the uplink channel is idle, the serving base station sends a control frame to the surrounding authorized auxiliary access LAA device by using a preset subframe, so that other LAA devices except the user terminal determine whether to occupy according to the control frame. In the uplink channel, the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

The serving base station receives data sent by the user terminal through the uplink channel during the first reserved duration.
The method for communicating using an unlicensed spectrum according to claim 1, wherein the preset subframe is a subframe located at a Long Term Evolution (LTE) uplink and downlink transition point, and the subframe includes a downlink pilot slot DwPTS, The protection time GP and the uplink pilot time slot UpPTS are three parts, and the serving base station sends a control frame to the surrounding LAA device, including:

The serving base station transmits a control frame to the surrounding LAA device in the DwPTS portion.
The method for communicating using an unlicensed spectrum according to claim 1, wherein when the serving base station further includes a WiFi module, the method further includes:

After the serving base station sends the control frame preset time period to the surrounding LAA device by using the preset subframe, the serving base station sends a CTS frame to the surrounding WiFi device by using the preset subframe, where the CTS frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel.
The method of communicating using an unlicensed spectrum according to claim 3, wherein the predetermined period of time is 16 μs or 10 μs in length.
A method for communicating using an unlicensed spectrum for a user terminal, wherein the method includes:

Before the user terminal performs data interaction with the serving base station through the uplink channel of the unlicensed spectrum, the user terminal receives the serving base station to authorize the auxiliary access to the LAA device by using a preset subframe. a control frame that is sent, where the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

The user terminal monitors the uplink channel;

When the uplink channel is idle, the user terminal sends data to the serving base station through the uplink channel within the first reserved duration.
The method for communicating using an unlicensed spectrum according to claim 5, wherein the preset subframe is a subframe located at a long-term evolution LTE uplink and downlink transition point, and the subframe includes a downlink pilot slot DwPTS, The protection time GP and the uplink pilot time slot UpPTS are three parts, and the user terminal monitoring the uplink channel includes:

The user terminal monitors the uplink channel in the GP part; or

The user terminal monitors the uplink channel in the UpPTS part; or

The user terminal monitors the uplink channel in the GP and UpPTS sections.
The method for communicating by using an unlicensed spectrum according to claim 6, wherein the user terminal monitors the uplink channel in the GP part, and after determining that the uplink channel is idle, the method further includes:

The user terminal sends a response frame to the serving base station in the UpPTS part, where the response frame includes at least a second reserved duration of the uplink channel and/or a physical address of the serving base station, and the second pre- The length of stay is the length of time required for the user terminal to send a response frame to send all data to the serving base station;

The sending, by the user terminal, the data to the serving base station includes:

After transmitting the response frame, the user terminal sends data to the serving base station through the uplink channel within the second reserved duration.
An apparatus for communicating using an unlicensed spectrum for serving a base station, wherein the apparatus includes:

The monitoring module is configured to monitor the uplink channel before the serving base station performs data interaction with the user terminal through the uplink channel of the unlicensed spectrum;

a sending module, configured to send, by using a preset subframe, a control frame to a surrounding authorized auxiliary access LAA device when the uplink channel is idle, so that other LAA devices except the user terminal determine, according to the control frame, whether Occupying the uplink channel, the control frame includes at least the serving base station a physical address and a first reserved duration of the uplink channel;

And a receiving module, configured to receive data sent by the user terminal by using the uplink channel, within the first reserved duration.
The apparatus for communicating using an unlicensed spectrum according to claim 8, wherein the preset subframe is a subframe located at a Long Term Evolution (LTE) uplink and downlink transition point, and the subframe includes a downlink pilot slot DwPTS, Protection time GP and uplink pilot time slot UpPTS,

The sending module is specifically configured to send a control frame to the surrounding LAA device in the DwPTS part.
The apparatus for communicating using an unlicensed spectrum according to claim 8, wherein when the serving base station further includes a WiFi module,

The sending module is further configured to: after sending the control frame preset time period to the surrounding LAA device by using the preset subframe, send a CTS frame to the surrounding WiFi device by using the preset subframe, where the CTS frame includes at least Describe the physical address of the serving base station and the first reserved duration of the uplink channel.
An apparatus for communicating using an unlicensed spectrum for a user terminal, wherein the apparatus comprises:

a receiving module, configured to receive, by the serving base station, a control frame sent by the serving base station to the surrounding authorized access LAA device by using the preset subframe, before the user terminal performs data interaction with the serving base station by using the uplink channel of the unlicensed spectrum, where the control frame is sent by the serving base station Include at least a physical address of the serving base station and a first reserved duration of the uplink channel;

a monitoring module, configured to monitor the uplink channel;

And a sending module, configured to send data to the serving base station by using the uplink channel during the first reserved duration when the uplink channel is idle.
The apparatus for communicating using an unlicensed spectrum according to claim 11, wherein the preset subframe is a subframe located at a Long Term Evolution (LTE) uplink and downlink transition point, and the subframe includes a downlink pilot slot DwPTS, Protection time GP and uplink pilot time slot UpPTS,

The monitoring module is specifically configured to monitor the uplink channel in the GP part; or

Listening to the upstream channel in the UpPTS portion; or

The upstream channel is monitored at the GP and UpPTS portions.
The apparatus for communicating using an unlicensed spectrum according to claim 12, wherein

The monitoring module monitors the uplink channel in the GP part, and determines that the uplink channel is idle;

The sending module is further configured to send, in the UpPTS part, a response frame to the serving base station, where the response frame includes at least a second reserved duration of the uplink channel and/or a physical address of the serving base station, The second reserved duration is the length of time required for the user terminal to send a response frame to all data sent to the serving base station, and after transmitting the response frame, passes the uplink within the second reserved duration The channel transmits data to the serving base station.
A system for communicating using unlicensed spectrum, including:

The serving base station is configured to monitor the uplink channel before performing data interaction with the user terminal through the uplink channel of the unlicensed spectrum, and send a control frame to the surrounding authorized auxiliary access LAA device when the uplink channel is idle And determining, by the LAA device other than the user terminal, whether to occupy the uplink channel according to the control frame, where the control frame includes at least a physical address of the serving base station and a first reserved duration of the uplink channel;

The user terminal is configured to receive the control frame sent by the serving base station, and monitor the uplink channel, and when the uplink channel is idle, pass the uplink channel in the first reserved duration. Sending data to the serving base station.