CN106160967A

CN106160967A - The transmission method of a kind of unauthorized resource and device

Info

Publication number: CN106160967A
Application number: CN201510145660.3A
Authority: CN
Inventors: 杨玲; 苟伟; 戴博; 夏树强; 彭佛才; 毕峰; 李新彩
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-03-30
Filing date: 2015-03-30
Publication date: 2016-11-23
Also published as: WO2016155480A1

Abstract

The invention discloses transmission method and the device of a kind of unauthorized resource, the process that first transmission node performs includes: the first transmission node carries out CCA detection on the unauthorized carrier resource specified, when the described unauthorized carrier resource free time being detected, sending instruction information on public resource or appointment resource or send instruction information and carry out a data transfer, described instruction information is used for notifying that described unauthorized carrier resource takies.The process that second transmission node performs includes: the second transmission node detects on public resource or appointment resource, when instruction information being detected, judge that the unauthorized carrier resource whether described second transmission node can use described first transmission node to compete carries out data transmission according to described instruction message content.Embodiment of the present invention scheme is used to be greatly improved the utilization rate of unauthorized carrier resource.

Description

Unauthorized resource transmission method and device

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a method and an apparatus for transmitting unauthorized resources.

Background

The unlicensed carrier has the following characteristics:

1. free/low cost (no unlicensed spectrum needs to be purchased, zero cost of spectrum resources);

2. the admission requirement is low, the cost is low (individuals and enterprises can participate in deployment, and equipment of equipment suppliers can be deployed at will);

3. the available bandwidth is large (5GHz and 2.4GHz unauthorized frequency bands can be used);

4. sharing resources (when a plurality of different systems operate therein or different operators of the same system operate therein, some ways of sharing resources can be considered, so that spectrum efficiency is improved);

5. multiple wireless access technologies (different communication standards are spanned, the cooperation is difficult, and the network topology is various);

6. the number of wireless access sites is large (the number of users is large, the cooperation difficulty is large, and the centralized management overhead is large);

7. applications are numerous (multiple services are mentioned in which it is possible to operate, for example Machine to Machine (M2M for short), Vehicle to Vehicle (V2V for short)).

In the evolution process of LTE, LTE Rel-13 release started a research project in 2014, 9, in which one important thing is that the LTE system works with unlicensed carriers. The technology enables the LTE system to use the existing unlicensed carrier, greatly improves the potential spectrum resources of the LTE system, and enables the LTE system to obtain lower spectrum cost.

However, LTE uses unlicensed carriers for data transmission, and one of the problems is how to quickly notify information that the unlicensed carrier resources are successfully occupied after the UE participates in contention of the unlicensed carrier resources and the contention is successful, and how to efficiently transmit uplink data. To address this problem, no specific solution is available at present.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a method and a device for transmitting unauthorized resources, so that a transmission node participating in unauthorized carrier resource competition and successfully competing can quickly inform other transmission nodes of information of successfully occupying the unauthorized carrier resources and multiplex the contended resources for data transmission.

In order to solve the above technical problem, the present invention provides a method for transmitting unauthorized resources, which comprises:

the first transmission node carries out CCA detection on the designated unauthorized carrier resources, and when the unauthorized carrier resources are detected to be idle, the first transmission node sends indication information or sends the indication information and carries out data transmission on the common resources or the designated resources, wherein the indication information is used for notifying that the unauthorized carrier resources are occupied.

Optionally, the first transmission node comprises a first terminal.

Optionally, the common resource is located on an unlicensed carrier resource, the maximum range is two subframes, and the minimum range is one complete OFDM symbol.

Optionally, the common resource includes the following resources in time domain: executing a first complete OFDM symbol after CCA succeeds; or, after the CCA is successfully executed, starting from the first complete OFDM symbol to an OFDM symbol in the subframe boundary where the CCA is executed; or, after performing CCA successfully, starting from the first complete OFDM symbol to the OFDM symbol in the next subframe boundary; the common resources include the following resources in the frequency domain: the entire frequency domain resource; or, the resources of the preset bandwidth are occupied on the whole frequency domain; or one or more physical resource blocks PRB consisting of a plurality of subcarriers.

Optionally, the designated resource is located on an unlicensed carrier resource, and starts from a first OFDM symbol after the CCA is successfully performed to an end of a current subframe, or performs the CCA in a first subframe after the subframe.

Optionally, the designated resource is a physical uplink shared channel PUSCH resource.

Optionally, the indication information is further used for the second transmission node to determine whether the second transmission node can use the contended unlicensed carrier resource, and includes the following information: a channel sounding reference signal, SRS; or, primary and secondary synchronization sequences PSS/SSS; alternatively, a Preamble sequence Preamble; the second transmission node comprises one or more of the following nodes: the first base station to which the first terminal belongs, and the adjacent base station of the first base station perform CCA detection on the appointed unlicensed carrier resources but do not compete to other terminals of the unlicensed carrier resources; the indication information comprises the following information: cell identification information.

Optionally, the indication information further includes the following information: operator identification and/or co-frequency multiplexing indication identification.

Optionally, the indication information is obtained from a base sequence, and the base sequence is obtained by the following method:

base sequenceWhere u represents the sequence group number, u ∈ {0, 1., N-1}, N is the number of groups, v is the base sequence number within the group, and time slot N is the base sequence number within the group_sThe sequence number u in (b) is given by:

u＝(f_gh(n_s)+f_ss) mod N, where f_gh(n_s) For group jump patterns, f_ssA pattern is shifted for the sequence;

f is_gh(n_s) Obtained using the following formula:

wherein c is a pseudo-random sequence, and the initialization value of the pseudo-random sequence is obtained by adopting the following formula:whereinIdentifying the cell;

f is_ssThe method comprises the following steps:

for the physical uplink control channel PUCCH,

for the physical uplink shared channel PUSCH,△ therein_ssIs identified for the operator, △_ss∈ {0,1, …, m }, m being the number of operators;

for the channel sounding reference signal SRS,

optionally, the first transmission node further transmits the indication information on device-to-device D2D resources on a licensed carrier.

In order to solve the above technical problem, the present invention further provides a device for transmitting unauthorized resources, where the device is located at a first transmission node, and the device includes a first detecting module and a sending module, where:

the first detection module is configured to perform CCA for clear channel assessment on a designated unlicensed carrier resource;

the sending module is configured to send indication information or send indication information and perform data transmission once on a common resource or a designated resource when the first detecting module detects that the unlicensed carrier resource is idle, where the indication information is used to notify that the unlicensed carrier resource is occupied.

Optionally, the first transmission node comprises a first terminal.

Optionally, the common resource is located on an unlicensed carrier resource, the maximum range is two subframes, and the minimum range is one complete OFDM symbol;

the designated resource is located on an unlicensed carrier resource, and starts from a first OFDM symbol after CCA is successfully executed to the end of a current subframe, or executes a first subframe after a subframe where CCA is located.

Optionally, the indication information is further used for the second transmission node to determine whether the second transmission node can use the contended unlicensed carrier resource, and includes the following information: a channel sounding reference signal, SRS; or, primary and secondary synchronization sequences PSS/SSS; alternatively, a Preamble sequence Preamble;

the second transmission node comprises one or more of the following nodes: the first base station to which the first terminal belongs, and the adjacent base station of the first base station perform CCA detection on the appointed unlicensed carrier resources but do not compete to other terminals of the unlicensed carrier resources;

the indication information comprises the following information: cell identification information.

Optionally, the apparatus further includes an indication information calculation module, configured to obtain the indication information by using a base sequence, where the indication information calculation module obtains the base sequence by calculating in the following manner

Optionally, the sending module is further configured to send the indication information on a device-to-device D2D resource on a licensed carrier.

Another technical problem to be solved by the present invention is to provide a method and an apparatus for transmitting an unlicensed resource, so as to improve the usage rate of an unlicensed carrier.

In order to solve the above technical problem, the present invention further provides a method for transmitting unauthorized resources, where the method includes:

and the second transmission node detects the common resource or the designated resource, and when the indication information is detected, whether the second transmission node can use the unauthorized carrier resource contended by the first transmission node to perform data transmission is judged according to the content of the indication information.

Optionally, the first transmission node comprises a first terminal;

the second transmission node comprises one or more of the following nodes: the first base station to which the first terminal belongs, and the adjacent base station of the first base station perform CCA detection on the unlicensed carrier resources but do not compete for other terminals of the unlicensed carrier resources.

the designated resource is a Physical Uplink Shared Channel (PUSCH) resource located on an unauthorized carrier resource.

Optionally, the second transmission node includes a first base station to which the first terminal belongs;

the determining, according to the content of the indication message, whether the second transmission node can use the unlicensed carrier resource contended by the first transmission node for data transmission includes:

the first base station receives the indication message, considers that the first transmission node successfully competes for the unauthorized carrier resources, and can use the unauthorized carrier resources for data transmission; or

And the first base station receives the indication message, and the indication message contains an intra-frequency multiplexing indication identifier, the first base station broadcasts to inform the adjacent base stations of the same operator of using the unauthorized carrier resources, and after resource negotiation is carried out, the first base station and terminals under the adjacent base stations of the same operator carry out data transmission on the unauthorized carrier resources in a multiplexing mode.

Optionally, the second transmission node includes a neighboring base station of the first base station to which the first terminal belongs;

and the adjacent base station receives the indication message, judges that the operator identifier in the indication message is the same as the adjacent base station, carries out resource negotiation with other base stations under the same operator if the indication message contains the same-frequency multiplexing indication identifier, and carries out data transmission on the unauthorized carrier resources in a multiplexing mode with other base stations under the same operator after carrying out resource negotiation.

Optionally, the second transmission node includes other terminals that have performed CCA detection on the unlicensed carrier resources but do not contend for unlicensed carrier resources;

the second transmission node detecting on a common resource or a designated resource, comprising: the terminal performs blind detection on the public resource or the specified resource, receives the indication message and analyzes the received indication message;

the terminal judges whether the cell identifier in the indication information is the same as the cell identifier of the terminal, if so, the terminal considers that the unauthorized carrier resources contended by the first transmission node can be multiplexed, and performs data transmission on the unauthorized carrier resources in a multiplexing mode; or,

and if the terminal judges that the cell identifier in the indication message is different from the cell identifier of the terminal, but the operator identifier is the same as the operator identifier of the terminal and the indication message contains the same-frequency multiplexing indication identifier, the terminal considers that the unauthorized carrier resources contended by the first transmission node can be multiplexed, and performs data transmission on the unauthorized carrier resources in a multiplexing mode.

Optionally, the method further comprises: when the second transmission node cannot correctly analyze the indication information, giving up performing blind detection on the public resource or the designated resource, and performing CCA detection only in real time within the channel occupation period of the unlicensed carrier; or abandoning the CCA detection in the channel occupation period of the unlicensed carrier.

Optionally, the terminal performs data transmission on the unlicensed carrier resource in a multiplexing manner, including:

and the terminal performs data transmission at the first complete OFDM symbol or the first subframe position after the common resource or the designated resource according to the pre-scheduling information.

Optionally, the unlicensed carrier resources used for data transmission in a multiplexing manner include: the resources indicated in the pre-scheduling information, or the resources autonomously negotiated between the terminals performing data transmission in a multiplexing mode.

In order to solve the above technical problem, the present invention further provides a device for transmitting unauthorized resources, where the device is located at a second transmission node, and the device includes a second detection module and a transmission module, where:

the second detection module is used for detecting on public resources or specified resources;

and the transmission module is configured to, when the second detection module detects the indication information, determine whether the second transmission node can use the unauthorized carrier resource contended by the first transmission node for data transmission according to the content of the indication information.

Optionally, the first transmission node comprises a first terminal;

the step of judging, by the transmission module according to the content of the indication message, whether the second transmission node can use the unlicensed carrier resource contended by the first transmission node to perform data transmission includes:

the transmission module judges that the second detection module receives the indication message, and the first transmission node is considered to compete successfully for the unauthorized carrier resources, so that the unauthorized carrier resources can be used for data transmission; or

And the transmission module judges that the second detection module receives the indication message and analyzes that the indication message contains an indication identifier of same-frequency multiplexing, and then the transmission module broadcasts to inform the adjacent base stations of the same operator to use the unauthorized carrier resources, and after resource negotiation, the transmission module and the terminals under the adjacent base stations of the same operator perform data transmission on the unauthorized carrier resources in a multiplexing mode.

and the transmission module judges that the operator identifier in the indication message received by the second detection module is the same as the operator identifier, and the indication message contains the same-frequency multiplexing indication identifier, performs resource negotiation with other base stations under the same operator, and performs data transmission on the unauthorized carrier resources in a multiplexing mode with other base stations under the same operator after performing the resource negotiation.

the second detection module detects on the public resource or the designated resource, and includes: the second detection module performs blind detection on the public resource or the designated resource, receives the indication message and analyzes the received indication message;

the transmission module judges whether the cell identifier in the indication information is the same as the cell identifier of the transmission module, if so, the transmission module considers that the unauthorized carrier resources contended by the first transmission node can be multiplexed, and performs data transmission on the unauthorized carrier resources in a multiplexing mode; or,

and the transmission module judges whether the cell identifier in the indication message is different from the cell identifier of the transmission module, if the operator identifier is the same as the operator identifier of the transmission module and the indication message contains the same-frequency multiplexing indication identifier, the transmission module considers that the unauthorized carrier resources contended by the first transmission node can be multiplexed, and performs data transmission on the unauthorized carrier resources in a multiplexing mode.

Optionally, the second detecting module is further configured to, when the indication information cannot be correctly analyzed, abandon blind detection on the common resource or the specified resource, and perform CCA detection only in a channel occupation period of the unlicensed carrier in real time; or abandoning the CCA detection in the channel occupation period of the unlicensed carrier.

Optionally, the transmitting module performs data transmission on the unlicensed carrier resource in a multiplexing manner, including: and the transmission module transmits data at the first complete OFDM symbol or the first subframe position after the common resource or the designated resource according to the pre-scheduling information.

The embodiment of the invention provides a method for transmitting messages and data by UE on unauthorized resources, wherein after the UE assists a base station to preempt an unauthorized carrier on an unauthorized frequency spectrum, the UE timely and quickly informs the base station and/or adjacent base stations and whether certain unauthorized carrier resources of the UE which participates in competition but does not compete successfully are available. According to the notification message, the UE under the same cell and/or the same operator can carry out frequency division multiplexing, and the utilization rate of the unauthorized carrier resources is greatly improved. In addition, the transmitted indication sequence can help the base station to acquire more accurate channel conditions and improve the communication quality. Meanwhile, the base station is detected on the designated resources, so that the energy consumption of the base station is further reduced, the blind detection time is reduced, and the working efficiency of the base station is greatly improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a flow chart of example 1 of the present invention;

FIG. 2 is a schematic structural diagram of an apparatus according to embodiment 2 of the present invention;

FIG. 3 is a flow chart of embodiment 3 of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus according to embodiment 4 of the present invention;

fig. 5 is an overall flowchart of an application example 1UE assisting a base station to contend for an unlicensed carrier and data transmission;

6a-b are schematic diagrams of time-frequency partition structures of common resources of application example 2;

7a-b are schematic diagrams of application example 3 specifying resource structures;

fig. 8 is a schematic diagram of a specific process of applying example 4 that a UE successfully contends to transmit an SRS signal on a common resource;

fig. 9 is a schematic diagram of application example 5, which employs a D2D mechanism to implement UE notification to other nodes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

Example one

This embodiment describes a process executed by a first transmission node in a method for transmitting an unauthorized resource, and as shown in fig. 1, the process includes:

step 1, a first transmission node performs CCA detection on idle channel assessment on a designated unauthorized carrier resource;

the first transmission node comprises a first terminal.

And 2, when detecting that the unlicensed carrier resources are idle, sending indication information on common resources or designated resources or sending the indication information and carrying out data transmission once, wherein the indication information is used for informing that the unlicensed carrier resources are occupied.

The public resource is positioned on the unauthorized carrier resource, the maximum range is two subframes, and the minimum range is a complete OFDM symbol.

Specifically, the common resource includes the following resources in the time domain: executing a first complete OFDM symbol after CCA succeeds; or, after the CCA is successfully executed, starting from the first complete OFDM symbol to an OFDM symbol in the subframe boundary where the CCA is executed; or, after performing CCA successfully, starting from the first complete OFDM symbol to the OFDM symbol in the next subframe boundary; the common resources include the following resources in the frequency domain: the entire frequency domain resource; or, the resources of the preset bandwidth are occupied on the whole frequency domain; or one or more physical resource blocks PRB consisting of a plurality of subcarriers.

Preferably, the designated resource is a Physical Uplink Shared Channel (PUSCH) resource.

The indication information for indicating that the unauthorized resource is occupied may be an empty message carrying no content.

In a preferred embodiment, the indication information is further used for the second transmission node to determine whether the second transmission node can use the contended unlicensed carrier resource, and includes the following information: a channel sounding reference signal, SRS; or, primary and secondary synchronization sequences PSS/SSS; alternatively, a Preamble sequence Preamble;

the second transmission node comprises one or more of the following nodes: the first base station to which the first terminal belongs, and the adjacent base station of the first base station perform CCA detection on the specified unlicensed carrier resources but do not compete for other terminals of the unlicensed carrier resources.

For the second transmission node to make a judgment, the indication information includes the following information: cell identification information. Preferably, the indication information further includes the following information: operator identification and/or co-frequency multiplexing indication identification.

The SRS, PSS/SSS or Preamble can be composed of a base sequenceThe sequence number is obtained, wherein u represents the serial number of the sequence group, u ∈ {0, 1., N-1}, N is the number of groups, v is the base serial number in the group, and the time slot N_sThe sequence number u in (b) is given by:

f is_gh(n_s) Obtained using the following formula:wherein c is a pseudo-random sequence, and the initialization value of the pseudo-random sequence is obtained by adopting the following formula:whereinIdentifying the cell;

f is_ssThe method comprises the following steps:

for the physical uplink control channel PUCCH,

for the channel sounding reference signal SRS,

in a preferred embodiment, the first transmission node may also send the indication information on device-to-device D2D resources on a licensed carrier.

Example two

The apparatus for implementing the method is located at a first transmission node, as shown in fig. 2, and includes a first detection module and a sending module, where:

It should be noted that, since the apparatus provided in this embodiment can implement the method of the first embodiment, other detailed operations can refer to corresponding contents of the first embodiment, and are not described herein again.

EXAMPLE III

This embodiment describes a process performed by a second transmission node in a method for transmitting an unauthorized resource, as shown in fig. 3, where the method includes:

step 1, a second transmission node detects on public resources or designated resources;

the location of the common resource and the specified resource is described in embodiment one.

And 2, when the indication information is detected, judging whether the second transmission node can use the unauthorized carrier resources contended by the first transmission node to carry out data transmission according to the content of the indication information.

In this example, the first transmission node comprises a first terminal; the second transmission node comprises one or more of the following nodes: the first base station to which the first terminal belongs, and the adjacent base station of the first base station perform CCA detection on the unlicensed carrier resources but do not compete for other terminals of the unlicensed carrier resources.

When the second transmission node includes a first base station to which the first terminal belongs, the first base station determines whether data transmission can be performed by using an unauthorized carrier resource contended by the first transmission node in the following manner:

When the second transmission node includes a neighboring base station of the first base station to which the first terminal belongs, the neighboring base station determines whether to perform data transmission using the unlicensed carrier resource contended by the first transmission node in the following manner:

When the second transmission node comprises other terminals which perform CCA detection on the unlicensed carrier resources but do not compete to the unlicensed carrier resources; the terminal performs blind detection on the public resource or the specified resource, receives the indication message and analyzes the received indication message; and judging whether the unlicensed carrier resources contended by the first transmission node can be used for data transmission by adopting the following modes:

If the terminal cannot correctly analyze the indication information, giving up blind detection on the public resource or the appointed resource, and only carrying out CCA detection in real time within the channel occupation period of the unlicensed carrier; or abandoning the CCA detection in the channel occupation period of the unlicensed carrier.

The data transmission of the terminal on the unlicensed carrier resources in a multiplexing manner means that: and the terminal performs data transmission at the first complete OFDM symbol or the first subframe position after the common resource or the designated resource according to the pre-scheduling information. The unlicensed carrier resources used for data transmission in a multiplexing mode include: the resources indicated in the pre-scheduling information, or the resources autonomously negotiated between the terminals performing data transmission in a multiplexing mode.

Example four

A transmission apparatus for unauthorized resources, which implements the method of the third embodiment of the present invention, is located at a second transmission node, as shown in fig. 4, and includes a second detection module and a transmission module, where:

It should be noted that, since the apparatus provided in this embodiment can implement the method of the third embodiment, other detailed operations can refer to corresponding contents of the third embodiment, and are not described herein again.

The above method is exemplified below by several application examples.

Application example 1

The overall process of the UE assisting the base station to contend for the unlicensed carrier and data transmission is shown in fig. 5. The method specifically comprises the steps that the UE assists the base station to seize the unauthorized carrier resources, and further informs surrounding base stations and other UEs after the resources are successfully competed, and the process of uplink transmission is carried out. The method comprises the following steps:

step 1, a base station sends an uplink scheduling grant (UL grant) to a UE, and notifies the UE of the following contention information: the number of the unlicensed carrier needing to assist competition, the subframe number, the starting time position for executing clear channel Assessment (CCA for short), which resource on the unlicensed carrier is in competition, and pre-scheduling information;

optionally, the contention information may further carry an operator identifier and/or an intra-frequency multiplexing indication, so that the UE performs uplink frequency division multiplexing transmission.

And step 2, the UE receiving the competition information sent by the base station executes CCA at the appointed position, and immediately sends an indication message or sends the indication message and data on the public resource or the appointed resource appointed with the base station in advance when the UE performs CCA to detect that the channel is idle.

Step 3, the base station to which the successfully contended UE belongs, the adjacent base station and other unsuccessfully contended UEs detect and receive on the public resource or the designated resource;

the purpose of the detection is as follows: for the UE which does not compete successfully, in order to know whether the contended unlicensed carrier can be multiplexed with the UE which has preempted the unlicensed carrier. For the base station or the adjacent base station, in order to determine whether the subordinate UE preempts the unlicensed carrier resources or can use the unlicensed carrier resources. Specifically, for a base station to which the UE belongs, in order to know whether the subordinate UE successfully preempts a specified unlicensed carrier resource; for the adjacent same operator base station, in order to know whether the same-frequency multiplexing is enabled, the contended unauthorized carrier resources are used together for data transmission through frequency division multiplexing; for other UEs, in order to detect whether the UE in the same cell preempts resources or the UE in the same operator cell under the same frequency multiplexing capability preempts resources, it is determined whether the node can use the preempted unlicensed carrier resources, i.e., whether the multi-user multiplexing uplink transmission can be performed.

And for the base station to which the UE successfully competes, receiving the indication information on the public resource or the designated resource, further analyzing the information content, and if the indication information is detected to be sent by the subordinate UE, considering that the unauthorized carrier wave resource detected by the UE is successfully preempted and available. If the analyzed information is sent by the subordinate UE and the same-frequency multiplexing identification is enabled, the subordinate base station needs to broadcast the available information of the unauthorized carrier to the adjacent same-operator base station through an X2 port and perform resource negotiation, the UE which has data to send in the base station and the adjacent same-operator base station carries out uplink data transmission on the common resource or the subframe after the appointed resource according to the negotiated resource, and the subordinate base station and the same-operator base station need to detect and receive the uplink data in real time within the occupation duration of the unauthorized carrier. If the indication information is an SRS signal, the base station needs to perform uplink channel measurement according to the SRS signal when knowing that the channel is available, and the measurement result can be used for the data transmission or prepare for the next data transmission. If the UE successfully contends sends the indication information and the primary uplink data on the common resource or the designated resource, the base station receives the indication information and then receives the uplink data when knowing that the channel is available.

For the UE side, if the UE which does not compete successfully detects that the indication information is sent by the UE in the same cell, the UE considers that the channel is available, and the UE transmits data on the unauthorized carrier wave in a frequency division multiplexing mode according to the pre-scheduling information. If the UE which does not compete successfully detects that the indication information is sent by the UE under the same operator and the same frequency indication is enabled, the UE can perform data transmission on the previously negotiated resource position. And the initial position for data transmission is as follows: starting at the first complete OFDM symbol or first subframe position after the common or designated resource.

Application example 2

The time-frequency partition structure of the common resource is shown in fig. 6a-b, and the common resource is a list Before Talk (Listen Before Talk) table (LBT) of FBE (Frame based equipment) as an example to illustrate its possible specific time domain position. According to the above definition of the common resource, the maximum range is from the first complete symbol after the CCA is successfully performed to the end of the next subframe boundary, that is, the maximum range of the common resource cannot exceed two subframes, and the minimum range is a complete OFDM symbol after the CCA is successfully performed.

As can be seen from the schematic part of the common resource in fig. 6, the common resource is composed of one or more OFDM symbols in the time domain, i.e. the minimum unit in the time domain of the common resource is one complete OFDM symbol. And the location of the common resource changes according to the location of the different CCAs, the location where the CCA is further performed is determined by the base station.

In FIG. 6It is indicated that the LBT subframe is,a common resource is represented that is,which indicates a downlink sub-frame,a special sub-frame is indicated and,indicating an uplink subframe.

As shown in fig. 6a, for the case that the UE starts to perform CCA contention at the start position of a subframe, if the time when the UE performs CCA contention to the unlicensed carrier resource is less than a complete OFDM symbol boundary, the UE needs to send an occupation signal, such as indication information, on the remaining time domain resource of the OFDM symbol to prevent other UEs of the present system or nodes (STAs) of an alien system (e.g., Wi-Fi system) from preempting the unlicensed carrier. If the time when the UE performs CCA contention to the unlicensed carrier resource is exactly the boundary of one complete OFDM symbol, for both cases, the starting position of the common resource is the starting position of the first complete OFDM symbol after the UE performs CCA contention to the resource, and it is determined whether to occupy one or more OFDM symbols according to the size of the UE transmission content (indication information or indication information and data).

As shown in fig. 6b, the common resource may also be divided in the frequency domain. The common resource is a resource occupying a predetermined bandwidth in a frequency domain after successfully performing CCA contention to an unauthorized carrier resource or one or more physical resource blocks PRB composed of a plurality of subcarriers, and the common resource can continuously occupy the next subframe of a CCA subframe at most in a time domain to finish.

The common resource is mainly used for sending the notification signal, so that the base station and the UE which does not compete successfully detect and receive the notification signal on the common resource, the occupation condition of the unauthorized carrier wave is obtained, and the loss caused by the real-time blind detection of the base station is reduced.

Application example 3

Fig. 7 is a schematic diagram of assigned resources, and as shown in fig. 7, the assigned resources for transmitting notification to the base station and other UEs are determined according to the positions of the UEs performing CCA, and the assigned resources always start from the first OFDM symbol to the boundary of the present subframe after the UEs successfully perform CCA.

For the case where the UE performs CCA at the beginning of a subframe, the specified resources (e.g., PUSCH) are as shown in fig. 7 a. If the position for performing CCA is at the end of one subframe, the resource is designated as PUSCH resource in the next subframe, as shown in fig. 7 b. That is, the UE successfully contending for the unlicensed carrier resources sends an indication message or indication message and data on the designated resources to inform the base station and other UEs which unlicensed carrier has been preempted. Optionally, the base station to which the ue belongs is notified to receive uplink data. Similarly, the base station and other UEs will detect the indication information on the designated resources. The designated resource has the same function as the common resource and is used as a transmission carrier for sending the indication information.

Application example 4

This example mainly details the generation procedure of the indication information transmitted by the UE that performs CCA success. Two indication information generation methods are mainly introduced here: one is to generate the required indication information by modifying the base sequence that is commonly used in the LTE physical layer protocol. The second is to define the indication sequence sent by the UE.

The first procedure for obtaining the required indication information by modifying the base sequence is as follows:

for the UE contending for the unlicensed carrier, the sent indication information may include: SRS (sounding reference signal), PSS/SSS (Primary synchronization sequence/Secondary synchronization sequence), Preamble (Preamble) and the like, wherein the signals are composed of a base sequenceObtained through certain treatment. Therefore, the base sequence which carries information such as Cell ID, operator identification, same frequency multiplexing indication and the like in the transmitted sequence is mainly detailedAnd (5) generating.

Base sequenceAn original sequence of indication information is sent for the UE side, where there are N packets, u represents a group number u ∈ {0, 1.., N-1}, v is a base sequence number within the group.

Time slot n_sSequence group number u within a sequence group by group hopping pattern f_gh(n_s) And sequence shift pattern f_ssIs obtained, i.e. u ═ f_gh(n_s)+f_ss) mod N, here given f_gh(n_s) And f_ssIn a new generation manner, if the sequence needs to carry the Cell ID identifier, the original group skip switch is turned on, which indicates that the Cell identifier indicates turning on in this example, as described in the following formula:

the initialization value of the pseudorandom sequence c is generated by a Cell ID value, that is:whereinIs a cell identity.

Further, the operator id that needs to be carried in the sequence can be obtained according to the following formula:

for PUCCH, f_ssThe Cell ID and N modulo can be used to obtain:whereinIs a cell identity.

For PUSCH, the Cell ID and operator identification may be carried in the sequence, so f_ssCan be obtained from the following formula:△ therein_ssIs identified for the operator, △_ss∈ {0,1, …, m }, m being the number of operators, the operator identity being known by the base station.

As for the SRS, it is preferable that,whereinIs a cell identity.

The parameters can be flexibly configured and configured differently, and the information carried in the indication sequence is different. Further, if the transmitted indication sequence needs to carry the same frequency indication flag (0 or 1), the generated sequence can be scrambled by using the flag to form a new sequence.

Specifically, in this embodiment, N is preferably 30, so that the value in the standard can be used, but is not limited to this value. m is 3 according to three common operators in China. The method is that the replacement is carried out on the basis of not changing the original formula architecture, so that the standardization workload is minimum.

The second method comprises the following steps: an indication sequence is defined. The specific process is as follows:

assume that the number of UE ID sets is m, i.e. { a }₀,…,a_m-1N in the Cell ID set, i.e. { b }₀,…,b_n-1P in the operator set, i.e. { c }₀,c₁,…c_p}. Alternatively, it is assumed that the same-frequency multiplexing flag is 0 or 1. Depending on the different permutation and combination of the elements in these three or four sets, either m x n x p or m x n x p 2 sequences can be obtained. Wherein each sequence represents a permutation and combination. For example: sequence 0 identifies UE ID a₀，Cell ID＝b₀，operator ID＝c₀The same frequency multiplex mark 0, and so on. The length of the custom sequence depends on the bandwidth size.

The values of m, n and p are not limited, and the preferable value of p can be 2.

The two methods can be modified appropriately according to different contents to be carried in specific indication information. The carried information is only an example, and other embodiments may not be limited to the carried information.

Application example 5

In this example, after the UE contends for the unlicensed carrier resource, the specific process of sending the indication information described in the above example to notify the base station and other UEs that the UE has preempted the successful carrier and performs data transmission is mainly described as follows:

step one, for a UE side, a base station triggers or appointed UE to execute CCA detection operation on an unauthorized carrier;

here, the UE that the base station triggers to participate in contention on the unlicensed carrier includes a UE that participates in contention with the unlicensed carrier in a predefined period, a UE that receives a UL grant, or a UE that is triggered by a Paging message, and the like. These UEs will detect the CCA location informed by the base station, and the location and number of CCA performed will be different for different frame structures. For FBE, the location where CCA is performed may be at the beginning of a subframe or at the end of a subframe. For LBE (Load Based Equipment), the location within a subframe where CCA is performed is uncertain and the number of CCAs is also uncertain. These can be configured by the base station side.

Here, for FBE, the UEs perform CCA in the same location, so that these UEs may compete for unlicensed carrier resources designated by the base station at the same time. For LBE, only one UE may eventually successfully contend for a specific unlicensed carrier at a time due to the different random backoff values generated by each UE.

And step two, the UE which is successful in competition in the step one sends indication information for preempting the successful unauthorized carrier wave to inform the base station and other UEs on the public resource or the appointed resource, or sends the indication information and the uplink data of the UE.

The common resource or the designated resource described herein is the resource described in examples 2 and 3, and will not be described repeatedly herein. The indication information sent by the UE may be SRS, Preamble, PSS/SSS, or indication identifier. Preferably, the SRS signal is transmitted, and the corresponding sequence generation manner is shown in example 4.

For example, the UE successfully contends sends the indication information or the indication information and data on the defined common resource or the designated resource. For the FBE structure, according to the description in step one, there may be a case where multiple UEs contend for an unlicensed carrier at the same time, and for this case, the UEs transmit indication information or indication information and data in a time division, frequency division or code division manner on a defined common resource or a designated resource. For LBE, only one UE successfully contends for resources each time CCA is performed, and the UE may transmit an indication message or the indication message and its data on a common resource or a designated resource.

And step three, the base station, the adjacent base stations and the UE which does not compete successfully detect and receive the indication message on the common resource or the designated resource, and the base station also receives the uplink data.

The base station receives the indication message (which may be indication information for notification or measurement) or the indication message and data on the common resource or the designated resource, and in the process of parsing, if the base station fails to decode the data sent by the UE, the base station can only know the unauthorized carrier that the subordinate UE has successfully contended through the received message. At this time, the base station has two processing methods: the first method is to transmit scheduling information of subordinate UEs. In order to enable the UE having data transmission in the cell to perform frequency division multiplexing data transmission on the contended unlicensed carrier resources. The UE side needs to receive the scheduling information sent by the base station before performing uplink transmission on the corresponding resource. The second method is that the base station starts to receive data transmitted from the UE side on the n + k subframe before the nth subframe before the UE performs CCA and the time when the UE competes for the resource is before the n + k (k < 4) subframe. And as long as the UE receiving the availability of the unauthorized carrier resources on the common resources or the designated resources starts uplink data transmission on the n + k subframe in a time division, frequency division or code division mode.

If the same-frequency multiplexing function carried in the indication information is turned on, that is, the same-frequency multiplexing indication is carried, the base station needs to notify, through an X2 port broadcast, the neighboring unlicensed carrier resources available to other cells under the same operator, and negotiate to implement data transmission of the UE under different cells. If the same-frequency multiplexing function is not enabled, only the UE in the cell can transmit data in a multiplexing mode, and then the base station receives uplink data transmitted by subordinate UE within the time length of occupying the channel.

In addition, the adjacent different operator base stations receive the indication message, namely the unauthorized carrier is considered to be occupied, and stop detecting.

For UE which does not compete successfully, detecting indication information on public resources or specified resources, analyzing the Cell ID of the UE to judge whether the UE is the same Cell or whether the indication information carries operator identification and co-frequency multiplexing indication. If the UE which does not successfully compete analyzes the indication information to carry the CellID which is the same as the UE itself, the UE considers that the specific non-authorized carrier is available, and after the UE which can correctly analyze that the channel is available transmits the data of the UE itself on the first subframe after the common resource or the designated resource or after the CCA is executed and the UE which detects that the channel is idle sends the data of the UE itself, the UE which can correctly analyze that the channel is available can carry out uplink data transmission in a frequency division multiplexing mode. If the Cell ID carried in the instruction information analyzed by the UE that has not succeeded in contention is different from itself, but the operator ID is the same and the same is the same, the UE may consider that the resource on the specific unlicensed carrier is available, and may perform uplink data transmission in a frequency division multiplexing manner according to the convention that the UE that can correctly analyze that the channel is available transmits its own data on the common resource or the first subframe after the designated resource or after the CCA is executed to detect that the channel is idle. And if the UE which does not compete successfully cannot analyze the Cell ID, the operator identification and the co-frequency multiplexing indication in the indication information, the UE considers that the channel is unavailable.

For the UE with incorrect parsing indication information, the following method may be used:

the first method comprises the following steps: detection on common or designated resources is abandoned, but channel detection is performed in real time during the channel occupancy period. The method is mainly used for the situation that data transmission is finished in advance for the UE which carries out data transmission on the contended unauthorized carrier, and can further improve the utilization efficiency of channel resources.

The channel occupancy period is calculated from the UE performing CCA success transmitting an occupancy signal. The UE can perform data transmission once on common resources or designated resources in a channel occupying period, and can also perform data transmission on unauthorized carrier resources after the channel occupying period.

The second method comprises the following steps: and directly abandoning channel busy and idle detection in the unauthorized carrier occupation period. This may result in a significant waste of channel resources.

Application example 6

Fig. 8 is a schematic diagram illustrating a specific process of transmitting an SRS signal on a common resource by a UE successfully contended in the present example;

specifically, in this example, the occupation signal (e.g., indication information) transmitted by the UE that performs CCA successfully is used to notify the base station that the UE has successfully preempted to the specific unlicensed carrier on one hand, and is used to perform uplink channel measurement on the other hand.

As shown in fig. 8, a UE qualified for contention for an unlicensed carrier at the time of a subframe start performs CCA detection, and preferably transmits an occupied signal if the contention-participating UE performs CCA successfully but the time of CCA success is less than a full OFDM symbol boundary. If the time of contention is exactly the boundary of a complete OFDM symbol, the SRS signal is preferably transmitted on the common resource after CCA in a frequency division or code division manner. It should be emphasized that the SRS signal sent here not only serves to inform the base station of the occupation situation, but also is used to inform the base station of performing uplink channel quality measurement of these UEs, i.e. to inform the base station of how large the measured bandwidth is, the period, which subframe is, etc., so that the base station receives the SRS signal sent by the UE that competes successfully for occupation notification, further measures the channel condition between each UE and the base station, and better allocates appropriate resources and MCS to each UE.

If each UE performs CCA at a different location, only one UE1 among them successfully performs CCA and transmits the corresponding SRS information. The unsubscribed UE2 and UE3 receive and detect the occupancy signal transmitted by UE1 on the common resource or the designated resource. If the UE2 receives and detects that the Cell ID carried in the signal transmitted by the UE1 is the same as itself, the UE2 transmits its SRS signal on the common resource, i.e., informs the base station to measure the channel condition between itself and the base station. However, the Cell ID detected by the UE3 is different from the Cell ID itself, but if it is detected that the occupied signal carries the co-frequency multiplexing indication and is enabled, that is, the UE1 and the UE3 are UEs of different cells under the same operator, the UE3 also transmits its SRS signal on the common resource. On the contrary, if the UE2 and the UE3 cannot correctly resolve the occupied signal, the UE2 and the UE3 either abandon the reception, consider the carrier as unavailable, and stop the detection. Or detecting the idle condition of the channel is always performed during the period of the unauthorized carrier occupation.

At this time, the base station which always detects on the common resource can know the channel conditions of other UEs, so that the appropriate MCS level can be issued according to the reported channel measurement information, and the transmission quality is improved.

In order to avoid resource preemption by the site of the different system in the time when the base station and other UEs detect and receive the indication information, the contended UEs may repeatedly send the occupation signal all the time.

Application example 7

Fig. 9 is a schematic diagram of the present example implementing UE notification to other nodes by using D2D mechanism.

By adopting a D2D mechanism, assuming that the base station side can assign corresponding resources to all the UEs on the unlicensed carriers in advance, the base station and the adjacent base station have better X2 interfaces and better synchronization, and the UE which does not compete successfully immediately starts to detect on a D2D shared channel (PSSCH) when detecting that the carriers are busy.

As shown in fig. 9, among all UEs participating in contention on the unlicensed carrier, the UE1 successfully contends for the unlicensed carrier at time t, and at this time, the UE1 transmits the predetermined indication information on the corresponding resource of the psch on the licensed carrier, so that other UEs (e.g., UE2 and UE3) can receive the sequence on the psch, thereby stopping CCA detection on the carrier. Meanwhile, the base station and the neighbor base stations also detect the appointed indication information on the PSSCH resource. In this way, the UE1 notifies other base stations and UEs that the unlicensed carrier resources have been successfully preempted. Meanwhile, the UE1 that has succeeded in contention also needs to send an indication message indicating that the channel is occupied on the unlicensed carrier, so as to avoid preemption by other nodes.

It should be noted that the psch resource in D2D is flexibly configurable in each subframe and each slot.

In this way, the situation that a plurality of UEs simultaneously occupy the same unlicensed carrier can be solved. Because each UE has independent resources in PSSCH, no conflict is generated, and the correct decoding efficiency of the base station is greatly increased. Thereby enabling the base station to acquire available unlicensed carrier information.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for transmitting unauthorized resources, the method comprising:

2. The method of claim 1,

the first transmission node comprises a first terminal.

3. The method of claim 1,

4. The method of claim 3,

the common resource includes the following resources in the time domain:

executing a first complete OFDM symbol after CCA succeeds; or,

starting from the first complete OFDM symbol to an OFDM symbol in a subframe boundary for executing CCA after the CCA is executed successfully; or,

performing an OFDM symbol in the boundary from the first complete OFDM symbol to the next subframe after the CCA is successfully executed;

the common resources include the following resources in the frequency domain:

the entire frequency domain resource; or,

resources occupying a predetermined bandwidth in the whole frequency domain; or,

one or more physical resource blocks PRB consisting of a plurality of subcarriers.

5. The method of claim 1,

6. The method of claim 5,

the specified resource is a Physical Uplink Shared Channel (PUSCH) resource.

7. The method of claim 2,

the indication information is further used for the second transmission node to determine whether the second transmission node can use the contended unlicensed carrier resource, and includes the following information: a channel sounding reference signal, SRS; or, primary and secondary synchronization sequences PSS/SSS; alternatively, a Preamble sequence Preamble;

8. The method of claim 7,

the indication information further includes the following information: operator identification and/or co-frequency multiplexing indication identification.

9. The method of claim 8,

the indication information is obtained from a base sequence, and the base sequence is obtained by adopting the following method:

f is_gh(n_s) Obtained using the following formula:

f is_ssThe method comprises the following steps:

for the physical uplink control channel PUCCH,

for the channel sounding reference signal SRS,

10. the method of claim 1, further comprising:

the first transmission node also transmits the indication information on device-to-device D2D resources on a licensed carrier.

11. A method for transmitting unauthorized resources, the method comprising:

12. The method of claim 11,

the first transmission node comprises a first terminal;

13. The method of claim 11,

the public resource is positioned on the unauthorized carrier resource, the maximum range is two subframes, and the minimum range is a complete OFDM symbol;

14. The method of claim 11 or 12 or 13,

the second transmission node comprises a first base station to which the first terminal belongs;

15. The method of claim 11 or 12 or 13,

the second transmission node comprises a neighboring base station of the first base station to which the first terminal belongs;

16. The method of claim 11 or 12 or 13,

the second transmitting node comprises other terminals that have performed CCA detection on the unlicensed carrier resources but do not contend for unlicensed carrier resources;

17. The method of claim 16,

the method further comprises the following steps: when the second transmission node cannot correctly analyze the indication information, giving up performing blind detection on the public resource or the designated resource, and performing CCA detection only in real time within the channel occupation period of the unlicensed carrier; or abandoning the CCA detection in the channel occupation period of the unlicensed carrier.

18. The method of claim 16,

the terminal performs data transmission on the unlicensed carrier resources in a multiplexing mode, including:

19. The method of claim 16,

the unlicensed carrier resources used for data transmission in a multiplexing mode include: the resources indicated in the pre-scheduling information, or the resources autonomously negotiated between the terminals performing data transmission in a multiplexing mode.

20. An apparatus for transmission of unlicensed resources, the apparatus being located at a first transmission node, the apparatus comprising a first detection module and a sending module, wherein:

21. The apparatus of claim 20,

the first transmission node comprises a first terminal.

22. The apparatus of claim 20,

23. The apparatus of claim 21,

24. The apparatus of claim 23,

25. The apparatus of claim 23,

the device also comprises an indication information calculation module which is used for obtaining the indication information by adopting a base sequence, and the indication information calculation module obtains the base sequence by adopting the following calculation modeWhere u represents the sequence group number, u ∈ {0, 1., N-1}, N is the number of groups, v is the base sequence number within the group, and time slot N is the base sequence number within the group_sThe sequence number u in (b) is given by:

f is_gh(n_s) Obtained using the following formula:

f is_ssThe method comprises the following steps:

for the physical uplink control channel PUCCH,

for physical uplinkThe physical channel is a shared channel, PUSCH,△ therein_ssIs identified for the operator, △_ss∈ {0,1, …, m }, m being the number of operators;

for the channel sounding reference signal SRS,

26. the apparatus of claim 20,

the sending module is further configured to send the indication information on a device-to-device D2D resource on a licensed carrier.

27. An apparatus for transmission of unlicensed resources, the apparatus being located at a second transmission node, the apparatus comprising a second detection module and a transmission module, wherein:

28. The apparatus of claim 27,

the first transmission node comprises a first terminal;

29. The apparatus of claim 27,

30. The apparatus of claim 27 or 28 or 29,

31. The apparatus of claim 27 or 28 or 29,

32. The apparatus of claim 27 or 28 or 29,

33. The apparatus of claim 32,

the second detection module is further configured to, when the indication information cannot be correctly analyzed, abandon blind detection on the common resource or the specified resource, and perform CCA detection only in real time within a channel occupation period of the unlicensed carrier; or abandoning the CCA detection in the channel occupation period of the unlicensed carrier.

34. The apparatus of claim 32,

the transmission module performs data transmission on the unlicensed carrier resources in a multiplexing manner, and includes:

and the transmission module transmits data at the first complete OFDM symbol or the first subframe position after the common resource or the designated resource according to the pre-scheduling information.