WO2017035937A1

WO2017035937A1 - Transmission method and terminal

Info

Publication number: WO2017035937A1
Application number: PCT/CN2015/093514
Authority: WO
Inventors: 乔梁; 李明菊; 张晨璐; 付婷; 邓一伟
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-08-28
Filing date: 2015-10-31
Publication date: 2017-03-09
Also published as: CN105101439A; CN105101439B

Abstract

Disclosed is a transmission method, comprising: if a terminal in a long-term evolution network needs to use an unauthorized frequency band to transmit uplink data, informing a base station and receiving a resource allocation announcement message returned by the base station, wherein the resource allocation announcement message contains resource block information allocated by the base station to the terminal; calculating an average power of the corresponding frequency bandwidth according to the resource block information; determining whether the average power reaches a pre-set channel busy/idle state threshold value; and if the average power does not reach the pre-set channel busy/idle state threshold value, using a resource allocated by the base station to transmit a service. Also disclosed is a terminal. By means of the present invention, compatibility between an LTE network and an existing network using an unauthorized frequency band can be realized.

Description

Transmission method and terminal

Technical field

The present invention relates to the field of communications technologies, and in particular, to a transmission method and terminal.

Background technique

With the rapid increase in communication traffic, the 3rd Generation Partnership Project (3GPP) authorized spectrum is becoming less and less sufficient to provide higher network capacity. To further improve the utilization of spectrum resources, 3GPP is discussing how to use unlicensed spectrum, such as the 2.4 GHz and 5 GHz bands, with the help of licensed spectrum. These unlicensed spectrums are currently used primarily in systems such as Wireless-Fidelity (Wi-Fi), Bluetooth, radar, and medical. Compared with networks such as Wi-Fi, Long Term Evolution (LTE) networks operating in unlicensed bands have the ability to provide higher spectrum efficiency and greater coverage, while allowing data traffic based on the same core network. Seamless switching between licensed and unlicensed bands. For the user, this means a better broadband experience, higher speed, better stability and better mobility.

In the existing LTE network, since the sub-carriers of the communication have good orthogonality, the anti-interference level of the LTE network is ensured, so the uplink and downlink transmissions of the base station and the user do not need to consider whether there are base stations or users in the surrounding data. transmission. However, access technologies used on unlicensed spectrum, such as Wi-Fi technology, have weak anti-interference capabilities. If the LTE network is used on an unlicensed band, regardless of whether other devices are using unlicensed bands, it will cause great interference to the Wi-Fi device. When a LTE network has a service transmission, the Wi-Fi device cannot perform data transmission, and can only wait until the LTE service transmission is completed, and can only transmit when the channel is detected to be in an idle state. This results in the LTE network not coexisting with existing networks using unlicensed bands when using unlicensed bands.

Summary of the invention

A technical problem to be solved by embodiments of the present invention is to provide a method and terminal for transmission. To solve the problem that the LTE network cannot coexist with the existing network using the unlicensed band.

In order to solve the above technical problem, the first aspect of the embodiments of the present invention provides a method for transmitting, include:

If the terminal in the LTE network needs to use the unlicensed frequency band to transmit the uplink data, the base station is notified to receive the resource allocation notification message returned by the base station, where the resource allocation notification message includes the resource block allocated by the base station to the terminal. information;

Calculating an average power of the corresponding frequency bandwidth according to the resource block information;

Determining whether the average power reaches a preset channel busy state threshold;

If the average power does not reach the preset channel busy state threshold, the resources allocated by the base station are used for service transmission.

Before calculating the average power of the corresponding frequency bandwidth according to the resource block information, the method further includes:

The physical downlink control channel is monitored, and the preset channel busy state threshold is obtained from the scheduling information searched by the specific terminal search space; or

Receiving the radio resource control signaling sent by the base station, and acquiring the preset channel busy state threshold from the radio resource control signaling group.

If the resource blocks allocated by the base station to the terminal are consecutive, the average power of the corresponding frequency bandwidth is calculated according to the resource block information, including:

Acquiring power of each resource block allocated by the base station to the terminal;

The power of each resource block is accumulated, and the average power of the corresponding frequency bandwidth of each resource block is obtained by dividing the number of the respective resource blocks.

If the resource blocks allocated by the base station to the terminal are not consecutive, the average power of the corresponding frequency bandwidth is calculated according to the resource block information, including:

The power of each resource block is accumulated, divided by the number of resource blocks in the entire bandwidth, and the average power of the entire bandwidth is obtained.

If the average power reaches the preset channel busy state threshold, the process jumps to the step of calculating the average power of the corresponding frequency bandwidth according to the resource block information.

A second aspect of the embodiments of the present invention provides a terminal, including:

An acquiring unit, configured to: if a terminal in a long-term evolution network needs to transmit uplink data by using an unlicensed frequency band, notify a base station to receive a resource allocation notification message returned by the base station, where the resource allocation notification message includes the base station is Resource block information allocated by the terminal;

a calculating unit, configured to calculate an average power of the corresponding frequency bandwidth according to the resource block information;

a determining unit, configured to determine whether the average power reaches a preset channel busy state threshold;

And a transmitting unit, configured to use the resource allocated by the base station to perform service transmission if the average power does not reach a preset channel busy state threshold.

The obtaining unit is further configured to:

If the resource blocks allocated by the base station to the terminal are consecutive, the calculating unit calculates an average power of the corresponding frequency bandwidth according to the resource block information, specifically for:

The calculating unit is further configured to perform the step of calculating an average power of the corresponding frequency bandwidth according to the resource block information, if the average power reaches a preset channel busy state threshold.

Embodiments of the present invention have the following beneficial effects:

After the terminal with the uplink data transmission requirement informs the base station of its demand, it acquires the resources allocated by the base station, and calculates the average power of the corresponding frequency band bandwidth according to the allocated resources, only when the average power does not reach the preset channel busy state threshold. The resource allocated by the base station is used for service transmission, and the LBT detection is performed according to the resource information allocated by the base station in the LTE network, thereby avoiding interference to other systems using the unlicensed frequency band, so that the LTE network can be It is compatible with existing systems using unlicensed frequency bands, which facilitates the use of unlicensed frequency bands by terminals in LTE networks, providing users with a higher speed and more stable service transmission experience.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flow chart of a first embodiment of a method for transmitting according to the present invention;

2 is a schematic flow chart of a second embodiment of a method for transmitting according to the present invention;

3 is a schematic flow chart of a third embodiment of a method for transmitting according to the present invention;

4 is a schematic diagram showing the composition of a first embodiment of the terminal of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention can be used for an LTE assisted access (LAA) system, which can fully utilize unlicensed frequency bands to provide users with a better broadband experience, higher speed, better stability, and more. Good mobility and good compatibility with existing systems that use unlicensed bands.

1 is a schematic flowchart of a first embodiment of a method for transmitting according to the present invention. In this embodiment, the method includes the following steps:

S101. If the terminal in the long term evolution network needs to use the unlicensed frequency band to transmit uplink data, notify the base station to receive the resource allocation notification message returned by the base station.

The resource allocation notification message includes resource block information allocated by the base station to the terminal.

Optionally, the detailed interaction between the terminal and the base station in step S101 may refer to the process of requesting the uplink transmission by the terminal:

The terminal requests the uplink resource from the base station, and the terminal passes the uplink control information (Uplink Control Information, UCI for short) in the Physical Uplink Control CHannel (PUCCH) according to the configuration of the upper layer according to a certain period and the subframe position. ) Scheduling Request (SR), while in the SR, the cell wireless network carrying the terminal Cell Radio Network Temporary Identifier (C-RNTI). After receiving the SR information, the base station sends an uplink grant authorization (UL grant), and first allocates a small amount of resources to the terminal for use.

2. The terminal uploads the Buffer Status Reports (BSR) signaling, and tells the base station the amount of data to be transmitted by the base station. After receiving the BSR signaling reported by the terminal, the base station according to the sounding reference signal (Sounding Reference Signal, reported by the terminal) A comprehensive analysis such as SRS) and existing resources of the base station determines whether to allocate resources to the terminal. If the condition does not satisfy the allocation of the resource to the terminal, the terminal re-initiates the random access network (RACH) after failing to upload the SR multiple times.

3. After determining that the terminal meets the resource allocation requirement, the base station allocates resources to the terminal, and the base station also needs to allocate the result, including a physical resource block (Physical Resource Block, PRB) and a modulation and coding scheme (Modulation and Coding Scheme, The abbreviation MCS) tells the terminal to determine the location where the terminal uploads data and the modulation and coding format used.

4. After receiving the resource allocation notification sent by the base station, the terminal listens to the Physical Downlink Control Channel (PDCCH) to find possible uplink transmission resource allocation, and obtains public information from the common search space. Searching for the scheduling information about itself from the specific terminal search space (UE specific search space) and the preset channel busy for the terminal to perform the Listening Before Talk (LBT) mechanism to detect the allocated resources. Free state threshold.

It should be noted that the preset channel busy state threshold value may be set by the device manufacturer at the time of leaving the device, or may be provided by the user, or may be provided by the user, and may be customized by the user, which is not limited in the embodiment of the present invention.

In a feasible implementation manner, the preset channel busy state threshold may be set to -62 dBm.

S102. Calculate an average power of the corresponding frequency bandwidth according to the resource block information.

The resource block information includes quantity information and location information of the resource blocks allocated by the base station for the terminal, and the location information of the resource blocks can be used to determine the corresponding frequency bandwidth, and the quantity information and each The power of the resource can be calculated to obtain the average power of the corresponding bandwidth.

S103. Determine whether the average power reaches a preset channel busy state threshold. If no, step S104 is performed. If yes, the resources allocated by the base station are not used for service transmission within a preset time.

S104. Perform service transmission by using resources allocated by the base station.

Specifically, when the average power reaches a preset channel busy state threshold, the current channel is in a busy state, and other devices are currently using the channel and the resources, so the terminal continues The continued use of the channel and the resources will cause conflicts and interferences to the services of other devices. Therefore, in this embodiment, the terminal cannot use the resources allocated by the base station for service transmission within a preset time, that is, the channel transmission cannot be occupied. Business data. Certainly, after a preset time or a preset time, the terminal may calculate the average power of the corresponding band broadband again and compare it. When the channel is determined to be in an idle state, the channel may be used for service transmission.

2 is a schematic flowchart of a second embodiment of a method for transmitting according to the present invention. In this embodiment, the method includes the following steps:

S201: If the terminal in the long term evolution network needs to use the unlicensed frequency band to transmit the uplink data, notify the base station to receive the resource allocation notification message returned by the base station.

S202. Listen to the physical downlink control channel, and obtain the preset channel busy state threshold from the scheduling information that is searched by the specific terminal search space.

Optionally, the terminal may receive the radio resource control signaling sent by the base station, and obtain the preset channel busy state threshold from the radio resource control signaling group.

S203. Calculate an average power of the corresponding frequency bandwidth according to the resource block information.

S204. Determine whether the average power reaches a preset channel busy state threshold. If no, step S205 is performed, and if yes, the process goes to step S203.

It should be noted that, after the jump, the power of each resource block can be monitored in real time, and the average power of the corresponding frequency bandwidth can be calculated, and the calculation can be started after the preset time, which is not limited in the embodiment of the present invention.

It should be noted that when the power of each resource block is monitored in real time, the power of each resource block may change or may not change. If the average power of the multiple calculations has not changed for the power constant, the channel is always occupied. Terminals cannot use these resource blocks for service transmission. If the transmission needs of the terminal or The transmission of the service is of high importance, and the transmission needs to be completed urgently. After the terminal performs the calculation of the preset number of times, for example, the terminal determines that the average bandwidth of the existing allocated resource is always higher than the preset channel busy state threshold. Then, the terminal can re-initiate the resource allocation request to the base station at this time, and use the method described in the embodiment of the present invention to determine whether the re-allocated resources are freely available, and use the resources re-allocated by the base station to complete the service transmission when available; The resource allocation request may carry the identification information of the service importance, so that the base station directly schedules the currently idle resource to the terminal for direct use, and quickly completes the service transmission.

S205. Perform service transmission by using resources allocated by the base station.

In the embodiment of the present invention, the channel busy state threshold value preset by the base station is configured in the scheduling information of the specific terminal search space, and the terminal may obtain and use the threshold value to compare with the calculated average power, without adding extra The signaling overhead; and when the average power reaches the preset channel busy state threshold, the resource allocated by the base station is not used for service transmission, and interference with other devices using the unlicensed band can be avoided, and the calculation continues. The average power, when the average power meets the requirements, uses the resources allocated by the base station to perform service transmission, and completes its own service requirements.

3 is a schematic flowchart of a third embodiment of a method for transmitting according to the present invention. In this embodiment, the method includes the following steps:

S301. If the terminal in the long term evolution network needs to use the unlicensed frequency band to transmit uplink data, notify the base station to receive the resource allocation notification message returned by the base station.

S302. Receive radio resource control signaling sent by the base station, and obtain the preset channel busy state threshold from the radio resource control signaling group.

Optionally, the terminal may also monitor the physical downlink control channel, and obtain the preset channel busy state threshold from the scheduling information searched by the specific terminal search space.

S303. Determine whether the resource blocks allocated by the base station to the terminal are continuous. If yes, go to step S304, otherwise go to step S305.

S304. Acquire power of each resource block allocated by the base station to the terminal, accumulate power of each resource block, and divide by the number of the respective resource blocks to obtain an average power of a corresponding frequency bandwidth of each resource block. .

For example, a total of 10 consecutive resource blocks are allocated from 1 to 10, and when the resource blocks allocated by the base station to the terminal are resource blocks of 3, 4, and 5, the calculation of the average power only needs to acquire the resource blocks of 3, 4, and 5 respectively. The power, and the summation sum divided by the number of resource blocks 3 can be. This can further improve the speed and accuracy of the average power calculation, and will not interfere with the result due to the information of other unallocated resource blocks, which can further improve the spectrum utilization.

S305. Acquire power of each resource block allocated by the base station to the terminal, accumulate power of each resource block, divide by the number of resource blocks in the entire frequency bandwidth, and obtain an average power of the entire frequency bandwidth.

For example, if there are a total of 10 consecutive resource blocks in total from 1 to 10, when the resource blocks allocated by the base station to the terminal are resource blocks of 3, 5, and 7, the average power can be calculated to obtain the power of the resource blocks of 1-10, respectively. And summing the sum by dividing the number of resource blocks by 10 to obtain the average power of the entire bandwidth.

Of course, in order to reduce the number of calculated resource blocks, it is also possible to obtain only the power of the resource blocks of 3-7, and after summing and dividing by 5, the average power of the corresponding bandwidth of the resource blocks of 3-7 is obtained, and the preset channel is busy. The idle state thresholds are compared.

S306. Determine whether the average power reaches a preset channel busy state threshold. If no, step S307 is performed, and if yes, the process goes to step S303.

S307. Perform service transmission by using resources allocated by the base station.

In this embodiment, when calculating the average power used for comparing with the preset channel busy state threshold, the terminal may perform different calculations according to the continuity of the allocated resource blocks, and when the allocated resource blocks are consecutive Only the power of consecutive resource blocks is summed and averaged by the number of consecutive resource blocks, which can improve the accuracy and computational efficiency of the calculation results, and is beneficial to improving the utilization efficiency of the spectrum resources.

Referring to FIG. 4, it is a schematic diagram of a composition of a first embodiment of a terminal according to the present invention. In this embodiment, the terminal includes:

The obtaining unit 100 is configured to: if the terminal in the long-term evolution network needs to use the unlicensed frequency band to transmit the uplink data, notify the base station to receive the resource allocation notification message returned by the base station, where the resource allocation notification message includes the base station as the Resource block information allocated by the terminal;

The calculating unit 200 is configured to calculate an average power of the corresponding frequency bandwidth according to the resource block information;

The determining unit 300 is configured to determine whether the average power reaches a preset channel busy state threshold;

The transmitting unit 400 is configured to use the resources allocated by the base station to perform service transmission if the average power does not reach a preset channel busy state threshold.

Optionally, the obtaining unit 100 is further configured to:

Listening to the physical downlink control channel, obtaining the location information from the search information of the specific terminal search space a preset channel busy state threshold; or

Optionally, if the resource blocks allocated by the base station to the terminal are consecutive, the calculating unit 200 calculates an average power of the corresponding frequency bandwidth according to the resource block information, specifically, to:

Optionally, if the average power reaches a preset channel busy state threshold, the calculating unit 200 is further configured to perform the step of calculating an average power of the corresponding frequency bandwidth according to the resource block information.

The foregoing obtaining unit 100, the calculating unit 200, the determining unit 300, and the transmitting unit 400 may exist independently or may be integrated. The obtaining unit 100, the calculating unit 200, the determining unit 300, or the transmitting unit 400 may be independent of the processing of the terminal in the form of hardware. The device is separately provided, and the setting form may be in the form of a microprocessor; it may also be embedded in the processor of the terminal in hardware form, or may be stored in the memory of the terminal in software to facilitate the processor of the terminal. The operations corresponding to the above acquisition unit 100, calculation unit 200, determination unit 300, and transmission unit 400 are invoked.

Of course, the obtaining unit 100 and the transmitting unit 400 can also be used as an interface circuit of the terminal, and can be integrated with the computing unit 200 or the determining unit 300, or can be independently set.

For example, in the first embodiment of the terminal of the present invention (the embodiment shown in FIG. 4), the determining unit 200 may be a processor of the terminal, and the functions of the obtaining unit 100, the calculating unit 200, and the transmitting unit 400 may be embedded. In the processor, it can also be set separately from the processor, or can be stored in the memory in the form of software, and the function is called by the processor. The embodiment of the invention does not impose any limitation. The above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer, or the like.

It should be noted that each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and the same similar parts between the various embodiments. You can refer to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

Through the description of the above embodiments, the present invention has the following advantages:

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A method of transmission, comprising:

If the terminal in the LTE network needs to use the unlicensed frequency band to transmit the uplink data, the base station is notified to receive the resource allocation notification message returned by the base station, where the resource allocation notification message includes the resource block allocated by the base station to the terminal. information;

Calculating an average power of the corresponding frequency bandwidth according to the resource block information;

Determining whether the average power reaches a preset channel busy state threshold;

If the average power does not reach the preset channel busy state threshold, the resources allocated by the base station are used for service transmission.
The method according to claim 1, wherein before calculating the average power of the corresponding frequency bandwidth according to the resource block information, the method further includes:

The physical downlink control channel is monitored, and the preset channel busy state threshold is obtained from the scheduling information searched by the specific terminal search space; or

Receiving the radio resource control signaling sent by the base station, and acquiring the preset channel busy state threshold from the radio resource control signaling group.
The method according to claim 2, wherein if the resource blocks allocated by the base station to the terminal are consecutive, calculating an average power of the corresponding frequency bandwidth according to the resource block information, including:

Acquiring power of each resource block allocated by the base station to the terminal;

The power of each resource block is accumulated, and the average power of the corresponding frequency bandwidth of each resource block is obtained by dividing the number of the respective resource blocks.
The method according to claim 2, wherein if the resource blocks allocated by the base station to the terminal are discontinuous, calculating an average power of the corresponding frequency bandwidth according to the resource block information, including:

Acquiring power of each resource block allocated by the base station to the terminal;

The power of each resource block is accumulated, divided by the number of resource blocks in the entire bandwidth, and the average power of the entire bandwidth is obtained.
The method according to any one of claims 1 to 4, wherein if the average power reaches a preset channel busy state threshold, jumping to calculating an average power of the corresponding frequency bandwidth according to the resource block information A step of.
A terminal, comprising:

An acquiring unit, configured to: if a terminal in a long-term evolution network needs to transmit uplink data by using an unlicensed frequency band, notify a base station to receive a resource allocation notification message returned by the base station, where the resource allocation notification message includes the base station is Resource block information allocated by the terminal;

a calculating unit, configured to calculate an average power of the corresponding frequency bandwidth according to the resource block information;

a determining unit, configured to determine whether the average power reaches a preset channel busy state threshold;

And a transmitting unit, configured to use the resource allocated by the base station to perform service transmission if the average power does not reach a preset channel busy state threshold.
The terminal according to claim 1, wherein the obtaining unit is further configured to:

The physical downlink control channel is monitored, and the preset channel busy state threshold is obtained from the scheduling information searched by the specific terminal search space; or

Receiving the radio resource control signaling sent by the base station, and acquiring the preset channel busy state threshold from the radio resource control signaling group.
The terminal according to claim 7, wherein if the resource blocks allocated by the base station to the terminal are consecutive, the calculating unit calculates an average power of the corresponding frequency bandwidth according to the resource block information, specifically for:

Acquiring power of each resource block allocated by the base station to the terminal;

The power of each resource block is accumulated, and the average power of the corresponding frequency bandwidth of each resource block is obtained by dividing the number of the respective resource blocks.
The terminal according to claim 7, wherein if the resource blocks allocated by the base station to the terminal are consecutive, the calculating unit calculates an average power of the corresponding frequency bandwidth according to the resource block information, specifically for:

Acquiring power of each resource block allocated by the base station to the terminal;

The power of each resource block is accumulated, divided by the number of resource blocks in the entire bandwidth, and the average power of the entire bandwidth is obtained.
The terminal according to any one of claims 6 to 9, wherein if the average power reaches a preset channel busy state threshold, the calculating unit is further configured to perform calculation according to the resource block information again. The step of corresponding average power of the bandwidth.