CN106376089B

CN106376089B - Data transmission method, system, user equipment and base station

Info

Publication number: CN106376089B
Application number: CN201510441687.7A
Authority: CN
Inventors: 李娜; 童辉; 陈卓; 刘光毅
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2015-07-24
Filing date: 2015-07-24
Publication date: 2020-02-14
Anticipated expiration: 2035-07-24
Also published as: WO2017016305A1; CN106376089A

Abstract

The invention discloses a data transmission method, which comprises the following steps: receiving, by a first User Equipment (UE), broadcasted scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE; and the first UE transmits data on the allocated resources when determining that the allocated resources can be used by using the resource allocation information of all the scheduled UEs at this time and combining a Listen Before Talk (LBT) mechanism. The invention also discloses a UE, a base station and a data transmission system.

Description

Data transmission method, system, user equipment and base station

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a data transmission method, a system, a User Equipment (UE) and a base station.

Background

With the development of Long Term Evolution (LTE) technology, people's demand for wireless broadband data is more and more obvious. The scarce spectrum resource is undoubtedly a big factor restricting the LTE technology. To meet the increasing demand, it is an effective method to expand the system bandwidth. Therefore, a Licensed-assisted access (LAA) scheme should be generated.

The core idea of the LAA technology is to aggregate unauthorized frequency bands into an LTE network for use based on an LTE network platform. The LAA scheme is mainly applied to a small-cell scenario, that is, a related spectrum of an LTE network is used as a primary carrier, an unlicensed (unlicensed) spectrum is used as a secondary carrier, the primary carrier and the secondary carrier provide services for users together in a carrier aggregation manner, and the increase of available bandwidth ensures that the data rate requirement of the users is guaranteed, so the system can be called as an LAA system.

In LAA systems, data transmission on unlicensed carriers must meet the regulatory requirements of unlicensed frequency bands, such as the use of Listen Before Talk (LBT) techniques to ensure that the channel is idle before transmitting data.

However, due to the LBT technique, in the multi-user uplink transmission process, each UE needs to perform channel monitoring before sending uplink data, and uplink data can be sent only when the channel is idle, so that the situation that the multiple UEs cannot perform uninterrupted transmission on continuous uplink subframes occurs, and the throughput performance of the LAA system is greatly reduced.

Disclosure of Invention

In order to solve the existing technical problem, embodiments of the present invention provide a data transmission method, system, UE and base station.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

the embodiment of the invention provides a data transmission method, which comprises the following steps:

receiving the broadcasted scheduling related information by the first UE; the scheduling related information comprises resource allocation information of all scheduled UE;

and the first UE sends data on the allocated resources when determining that the allocated resources can be used by using the resource allocation information of all the scheduled UEs at this time and combining an LBT mechanism.

In the foregoing solution, the determining, by using the resource allocation information of all the scheduled UEs this time and combining with an LBT mechanism, that the allocated resources can be used includes:

the first UE monitors whether a channel corresponding to the self-allocated resource is idle or not;

when the channel is determined to be busy, judging whether the channel is occupied by the data transmission of other scheduled UE according to the resource allocation information of other scheduled UE in the resource allocation information of all the scheduled UE;

determining that the allocated resources are available when it is determined that the channel is occupied by data transmissions of the other scheduled UEs.

the first UE monitors whether a channel corresponding to the self-allocated resources is idle or not, and determines that the allocated resources can be used when the channel is determined to be idle.

In the above scheme, the scheduling related information further includes a channel monitoring duration of the first UE;

correspondingly, the first UE monitors whether a channel corresponding to the resource allocated to the first UE is idle, and the monitoring is as follows:

and the first UE monitors whether a channel corresponding to the self-allocated resource is idle or not in the channel monitoring duration.

In the foregoing solution, the broadcasted scheduling related information is broadcasted through a Physical Downlink Control Channel (PDCCH) indication or a Control frame of a Media Access Control (MAC) layer.

In the above scheme, the method further comprises:

and in the scheduled time interval, the first UE sends channel occupation information on reserved resources in resources allocated to other scheduled UEs in all the scheduled UEs.

In the above scheme, the channel occupancy information is a preamble code.

The embodiment of the invention also provides a data transmission method, which comprises the following steps:

the base station distributes resources for all the scheduled UE;

the base station broadcasts the scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE; and the resource allocation information of the scheduled UE used this time is used for the scheduled UE to determine whether the allocated resources can be used.

In the foregoing scheme, the broadcasting the scheduling related information of this time includes:

and broadcasting the scheduling related information through a PDCCH indication or a control frame of an MAC layer.

In the above scheme, the method further comprises:

the base station informs other stations around the base station that the data cannot be sent within a specified time period; the specified time period is the time period of the UE scheduling.

In the above scheme, after the base station broadcasts the scheduling related information of this time and the interval is a short interframe Space (SIFS), the base station informs the other stations that the data cannot be sent in the specified time period.

In the above scheme, the base station informs other stations around itself that data cannot be transmitted within a specified time period by transmitting a Clear To Send (CTS) frame.

In the foregoing solution, the scheduling related information further includes: the channel monitoring duration of each UE; the channel monitoring duration is used for monitoring whether a channel corresponding to the self-allocated resource is idle or not by the corresponding UE within the channel monitoring duration.

An embodiment of the present invention further provides a UE, including: the device comprises a receiving unit, a resource determining unit and a first sending unit; wherein the content of the first and second substances,

the receiving unit is used for receiving the broadcasted scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE;

the resource determining unit is configured to trigger the sending unit when determining that the allocated resources can be used by using the resource allocation information of all the scheduled UEs this time and combining an LBT mechanism;

and the first sending unit is used for sending data on the allocated resources after receiving the trigger of the resource determining unit.

In the foregoing solution, the first sending unit is further configured to send the channel occupancy information on a reserved resource in resources allocated to other scheduled UEs in all the scheduled UEs in the current scheduled time period.

An embodiment of the present invention further provides a base station, including: a resource allocation unit and a second transmission unit; wherein the content of the first and second substances,

the resource allocation unit is used for allocating resources to all the scheduled UEs;

the second sending unit is used for broadcasting the scheduling related information of this time; the scheduling related information comprises resource allocation information of all scheduled UE; and the resource allocation information of the scheduled UE used this time is used for the scheduled UE to determine whether the allocated resources can be used.

In the above scheme, the second sending unit is further configured to inform other stations around the base station where the second sending unit is located that data cannot be sent within a specified time period; the specified time period is the time period of the UE scheduling.

An embodiment of the present invention further provides a data transmission system, including: a base station and a first UE; wherein the content of the first and second substances,

the base station is used for allocating resources to all the scheduled UE; broadcasting the scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UEs.

The first UE is used for receiving broadcasted scheduling related information; and when the resource allocation information of all the scheduled UEs is utilized and an LBT mechanism is combined, the allocated resources are determined to be available, and data is sent on the allocated resources.

According to the data transmission method, the system, the UE and the base station provided by the embodiment of the invention, the base station allocates resources for all the scheduled UEs; broadcasting the scheduling related information; after receiving the broadcasted scheduling related information, the first UE sends data on the allocated resources by utilizing the resource allocation information of all scheduled UEs in the scheduling related information at this time and combining an LBT mechanism when determining that the allocated resources can be used. Therefore, when the UE determines that the allocated resources can be used, uninterrupted transmission on continuous uplink subframes can be realized, and a plurality of scheduled UEs can perform uplink data transmission without interfering with each other, so that the throughput performance of the network system is greatly improved.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.

Fig. 1 is a schematic diagram illustrating a process of transmitting uplink data of multiple users in an LAA system in the related art;

fig. 2 is a schematic flow chart of a data transmission method at a UE side according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a data transmission method at a base station side according to an embodiment of the present invention;

FIG. 4 is a flow chart of a data transmission method according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a data transmission process according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an application scenario of the present invention;

fig. 7 is a diagram illustrating a transmission process of uplink data of multiple users according to a second embodiment of the present invention;

fig. 8 is a schematic diagram of a three-user uplink data transmission process according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a structure of a fourth UE according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating a four-base-station architecture according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a four-data transmission system according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Before describing the embodiments of the present invention, it is first known in detail why the multi-user uplink transmission process is not able to continuously transmit on consecutive uplink subframes for multiple UEs due to the LBT technology.

The main idea of LBT technology is that a station that needs to transmit data first listens to the medium for carriers (i.e. whether the listening channel is idle) to determine whether another station is transmitting data. If the medium is idle (i.e., the channel is idle), the station may transmit data; otherwise, the station will avoid for a period of time before attempting.

The LBT technique is also applied in the uplink data transmission process of the LAA system, i.e. the UE performs carrier sensing before sending uplink data, and can send uplink data only when the channel is idle. When there are multiple UEs, that is, in the process of multi-user uplink transmission, due to the influence of LBT technique, it is impossible to realize uninterrupted transmission of multiple UEs on continuous uplink subframes. Specifically, when a scheduled UE monitors data transmission of other scheduled UEs in the previous subframe, the channel is considered busy, and thus data is not transmitted in the designated subframe.

For example, as shown in fig. 1, in one scheduling, it is assumed that UE1, UE2, and UE3 are simultaneously scheduled by the same LAA evolved node b (eNB), where LAA eNB is an uplink resource allocated to UE1, an uplink resource allocated to UE2 is an uplink subframe 2, and an uplink resource allocated to UE3 is an uplink subframe 3. Before transmitting uplink data, UE2 monitors that the channel is occupied (since UE1 is uploading uplink data on uplink subframe 1), so UE2 will not transmit data on allocated uplink subframe 2. Similarly, for UE3, for the same reason as UE2, if UE3 monitors that the channel is occupied (since UE2 is uploading uplink data in uplink subframe 2), UE3 will not transmit data in the allocated uplink subframe 3, and since the previous subframe is occupied by data transmission of other scheduled UEs, UE2 and UE3 will not transmit data in the designated subframe, which greatly reduces LAA system throughput performance. Wherein, in figure 1,

indicating an uplink subframe.

Based on this, in various embodiments of the invention: the base station distributes resources for all the scheduled UE; broadcasting the scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE; and after receiving the broadcasted scheduling related information, the first UE transmits data on the allocated resources by using the resource allocation information of all the scheduled UEs at this time and combining an LBT mechanism when determining that the allocated resources can be used.

Example one

The present embodiment provides a data transmission method, which is applied to a UE, and as shown in fig. 2, the method includes the following steps:

step 201: receiving the broadcasted scheduling related information by the first UE; the scheduling related information comprises resource allocation information of all scheduled UE;

here, in actual application, the broadcasted scheduling related information may be broadcasted through a PDCCH indication or a control frame of a MAC layer.

The scheduling related information may further include: location information of the scheduled UE and/or an IDentity (ID) of the scheduled UE.

The ID of the UE may be a Temporary Identity (TMSI), an International Mobile Equipment Identity (IMEI), an International Mobile Subscriber Identity (IMSI), or an International Mobile Subscriber Identity (IMSI).

Step 202: and the first UE sends data on the allocated resources when determining that the allocated resources can be used by using the resource allocation information of all the scheduled UEs at this time and combining an LBT mechanism.

Specifically, the first UE monitors whether a channel corresponding to a resource allocated to the first UE is idle, determines that the allocated resource can be used when determining that the channel is idle, and sends data on the allocated resource;

When the channel is determined not to be occupied by data transmission of other scheduled UEs, it is determined that the allocated resources cannot be used, and at this time, the allocated resources may be occupied by transmission of WIFI data, so that uplink data cannot be transmitted on the allocated resources.

In an embodiment, the scheduling related information may further include: a channel monitoring duration;

correspondingly, the first UE monitors whether a channel corresponding to the self-allocated resource is idle or not in the channel monitoring duration.

Here, the channel listening duration is determined by the base station. The base station may determine the listening duration of the channel as needed.

When the scheduling related information further includes location information of the scheduled UE, the first UE may determine whether the channel is occupied by data transmission of other scheduled UEs according to resource allocation information of the other scheduled UEs and location information of the other scheduled UEs.

When the scheduling related information further includes the ID of the scheduled UE, the first UE may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of other scheduled UEs and the IDs of other scheduled UEs.

When the scheduling related information further includes: when the location information of the scheduled UE and the ID of the scheduled UE are obtained, the first UE may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of other scheduled UEs, the location information of other scheduled UEs, and the IDs of other scheduled UEs.

When the first UE transmits data on the allocated resources, the method may further include:

and in the current scheduled time period, the first UE sends channel occupation information on reserved resources in resources allocated to other scheduled UEs in all the scheduled UEs, so that the first UE does not need to monitor channels in the subsequent process in the current scheduling time period.

Here, the channel occupancy information may be a preamble code.

The present embodiment further provides a data transmission method, which is applied to a base station, as shown in fig. 3, and the method includes the following steps:

step 301: the base station distributes resources for all the scheduled UE;

here, the embodiment of the present invention does not limit the specific processing procedure of allocating resources to all the scheduled UEs this time. Such as: the base station firstly knows how much data of each UE in all the scheduled UEs needs to be sent; and then according to the data volume required to be sent by each UE and by combining the resource condition of the UE, allocating resources for all the scheduled UEs.

Step 302: the base station broadcasts the scheduling related information;

here, the scheduling related information includes resource allocation information of all the scheduled UEs this time.

Specifically, the base station may broadcast the current scheduling related information through a PDCCH indication or a control frame of the MAC layer.

Here, the resource allocation information of the scheduled UE used this time is used for the scheduled UE to determine whether the allocated resource is available.

The scheduling related information may further include: the channel monitoring duration of each UE; the channel monitoring duration is used for monitoring whether a channel corresponding to the self-allocated resource is idle or not by the corresponding UE within the channel monitoring duration.

Wherein, the base station may determine the channel monitoring duration of each UE according to needs.

In practical application, the scheduling related information may further include: and the position information of the scheduled UE and/or the ID of the scheduled UE, so that the scheduled UE judges whether the channel corresponding to the allocated resource is idle or not according to the resource allocation information, the position information and/or the ID of the scheduled UE of other scheduled UE.

Specifically, when the scheduling related information includes: when the resource allocation information of the scheduled UE and the position information of the scheduled UE are available, the scheduled UE can judge whether a channel corresponding to the allocated resource is idle according to the resource allocation information and the position information of other scheduled UEs;

when the scheduling related information includes: when the resource allocation information of the scheduled UE and the ID of the scheduled UE are available, the scheduled UE can judge whether a channel corresponding to the allocated resource is idle according to the resource allocation information and the ID of other scheduled UEs;

when the scheduling related information includes: when the resource allocation information of the scheduled UE, the location information of the scheduled UE, and the ID of the scheduled UE are received, the scheduled UE may determine whether a channel corresponding to the allocated resource is idle according to the resource allocation information, the location information, and the ID of other scheduled UEs.

In practical application, the broadcasted scheduling related information may be received by at least all the scheduled UEs this time, and may also be received by other UEs served by the base station or other surrounding sites.

In an embodiment, the method may further comprise:

the base station informs other stations around the base station that the data cannot be sent within a specified time period; the specified time period is the time period of the UE scheduled this time, so that the influence of other stations on the data reception sent by the first UE can be effectively avoided.

Specifically, the base station may notify the other stations that data cannot be sent within a specified time period after an interval SIFS after the scheduling related information is broadcast.

Here, SIFS is a short inter-frame interval in a WIFI system, used for high priority transmission scenarios; in this way, channel listening procedures can be avoided.

In practical application, the base station may notify the other stations that data cannot be transmitted within a specified time period by transmitting a CTS frame.

The other sites may be WIFI sites, etc.

The present embodiment further provides a data transmission method, as shown in fig. 4, the method includes the following steps:

step 401: the base station distributes resources for all the scheduled UE; broadcasting the scheduling related information;

The embodiment of the invention does not limit the specific processing process of allocating resources for all the scheduled UEs. Such as: the base station firstly knows how much data of each UE in all the scheduled UEs needs to be sent; and then according to the data volume required to be sent by each UE and by combining the resource condition of the UE, allocating resources for all the scheduled UEs.

The base station may broadcast the current scheduling related information through a PDCCH indication or a control frame of the MAC layer.

Here, the scheduling related information may further include: the channel monitoring duration of each UE; the channel monitoring duration is used for monitoring whether a channel corresponding to the self-allocated resource is idle or not by the corresponding UE within the channel monitoring duration.

In an embodiment, after the base station broadcasts the scheduling related information, the method may further include:

The other sites may be WIFI sites, etc.

Step 402: and after receiving the broadcasted scheduling related information, the first UE sends data on the allocated resources by utilizing the resource allocation information of all the scheduled UEs at this time and combining an LBT mechanism when determining that the allocated resources can be used.

determining that the allocated resources are available when the channel is occupied by data transmissions of the other scheduled UEs, as shown in fig. 5.

When the scheduling related information further includes: and when the channel monitoring duration is long, the first UE monitors whether a channel corresponding to the self-allocated resource is idle or not in the channel monitoring duration.

in the scheduled time period, the first UE sends channel occupation information on reserved resources in resources allocated to other scheduled UEs in all the scheduled UEs, so that the first UE does not need to monitor channels in the subsequent process in the scheduled time period, and the monitoring times are reduced. Specifically, it is assumed that the UE scheduled in the scheduling period includes: a first UE, a second UE, and a third UE; the resources allocated by the base station to the first UE are the uplink subframe 1 and the uplink subframe 3, but the uplink subframe 2 is not allocated, and at this time, the first UE sends the channel occupancy information on the uplink subframe 2, so that a channel monitoring process before sending data on the uplink subframe 3 can be avoided. If the channel occupancy information is not sent, other stations, such as WIFI stations, may monitor that the channel is idle in uplink subframe 2, and thus start sending data in uplink subframe 2, which may result in that the first UE cannot successfully send data in uplink subframe 3.

Here, the channel occupying information may be a preamble (preamble) code.

It should be noted that: the scheme provided by the embodiment of the invention can be suitable for a Time Division Duplex (TDD) system and a Frequency Division Duplex (FDD) system.

In the data transmission method provided by the embodiment of the invention, a base station allocates resources for all the scheduled UEs; broadcasting the scheduling related information; after receiving the broadcasted scheduling related information, the first UE sends data on the allocated resources by utilizing the resource allocation information of all scheduled UEs in the scheduling related information at this time and combining an LBT mechanism when determining that the allocated resources can be used. Therefore, when the UE determines that the allocated resources can be used, uninterrupted transmission on continuous uplink subframes can be realized, and a plurality of scheduled UEs can perform uplink data transmission without interfering with each other, so that the throughput performance of the network system is greatly improved.

In addition, the first UE monitors whether a channel corresponding to the self-allocated resource is idle or not; when the channel is determined to be busy, judging whether the channel is occupied by the data transmission of other scheduled UE according to the resource allocation information of other scheduled UE in the resource allocation information of all the scheduled UE; therefore, the UE can accurately know whether the channel is occupied by other scheduled UEs or not, and if the channel is occupied by other scheduled UEs, the UE can send data on the allocated resources, so that uninterrupted transmission on continuous uplink subframes can be realized in the multi-user uplink transmission process, and the throughput performance of a network system is greatly improved.

In addition, after the base station broadcasts the scheduling related information, the base station informs other stations around the base station that the data cannot be sent in a specified time period; the specified time period is the time period of the UE scheduled this time, so that the influence of other stations on the data reception sent by the scheduled UE can be further effectively avoided.

Example two

On the basis of the first embodiment, the present embodiment takes the WIFI system and the LAA system as examples to illustrate how to implement continuous transmission of uplink data of multiple users.

As shown in fig. 6, the UE scheduled by LAA eNB in this embodiment includes: UE1, UE2, and UE 3. Wherein, the UE3 is also within a coverage of a WIFI Access Point (AP). In fig. 6, → indicates that data transfer is underway,

indicating a listening range.

In the scheduling, the LAA eNB determines to schedule the UE1, the UE2, and the UE3 in the

uplink subframes

1, 2, and 3 according to the data amount required to be transmitted by the UE1, the UE2, and the UE3, and according to the resource condition of the LAA eNB. Specifically, the resources allocated to UE1 are

uplink subframes

1 and 2, the resources allocated to UE2 are

uplink subframes

1 and 3, the resources allocated to UE3 are uplink subframe 2, and the current scheduling related information is broadcast; the scheduling related information includes: resource allocation information, location information, and IDs of UE1, UE2, and UE 3.

For UE1, as shown in fig. 7, after receiving the broadcasted scheduling related information, UE1 monitors whether the channel is idle in the previous subframe of uplink subframe 1, and when determining that the channel is idle, transmits uplink data in

uplink subframes

1 and 2.

For UE2, as shown in fig. 7, after receiving the broadcasted scheduling related information, UE2 monitors whether the channel is idle in the previous subframe of uplink subframe 1, and when determining that the channel is idle, transmits uplink data in uplink subframe 1; and UE2 sends the preamble code on the reserved resource corresponding to uplink subframe 2, so that UE2 directly sends uplink data on uplink subframe 3 without monitoring the channel in the subsequent process in the current scheduling time period.

Here, the reserved resources may be determined as needed, such as: and taking the 1.08MHz frequency domain resource corresponding to the Physical Random Access Channel (PRACH) as a reserved resource and the like.

For UE3, as shown in fig. 7, after receiving the broadcasted scheduling related information, UE3 monitors whether the channel is idle in the previous subframe of uplink subframe 2, and at this time UE3 monitors that the channel is busy, and determines that the channel is occupied by the surrounding WIFI APs according to the resource allocation information, the location information, and the IDs of UE1 and UE2, so that UE3 does not send uplink data on uplink subframe 2.

Wherein, in figure 7,

which indicates an uplink sub-frame,

representing a preamble code.

As can be seen from the above description, in this embodiment, actually, by using the narrow-band placeholder (sending the channel occupancy information on the reserved resource in the resource allocated to the other scheduled UEs in all the scheduled UEs at this time), the influence of the WIFI system on the LAA system data is avoided.

EXAMPLE III

As shown in fig. 6, the UE scheduled by LAA eNB in this embodiment includes: UE1, UE2, and UE 3. Wherein the UE3 is also within the coverage of the WIFI AP.

uplink subframes

1, 2, and 3 according to the data amount required to be transmitted by the UE1, the UE2, and the UE3, and according to the resource condition of the LAA eNB. Specifically, the resources allocated to the UE1 are

uplink subframes

1 and 3, the resources allocated to the UE2 are uplink subframe 2, the resources allocated to the UE3 are

uplink subframes

2 and 3, and the current scheduling related information is broadcasted; the scheduling related information includes: resource allocation information, location information, and IDs of UE1, UE2, and UE 3.

Meanwhile, let LAA eNB have WIFI module, that is, let LAA eNB communicate with surrounding WIFI APs. After the LAA eNB sends broadcast scheduling information to tell the scheduled UE that the scheduling related information of the uplink data transmission is transmitted at the time, the LAA eNB sends a CTS frame through the WIFI module to tell that surrounding WIFI APs cannot send data in a specified time period (within the scheduling time length at the time), and therefore the influence of a WIFI network on the data receiving of the LAA network is avoided.

The CTS frame may be directly transmitted after an interval SIFS after the broadcast scheduling related information is transmitted, thereby avoiding a channel listening process. Here, SIFS is a short inter-frame interval in the WIFI system, and is used in a high-priority transmission occasion, so that after receiving the CTS frame, the WIFI AP shown in fig. 6 does not transmit data within a specified time period.

For UE1, as shown in fig. 8, after receiving the broadcasted scheduling related information, UE1 monitors whether the channel is idle in the previous subframe of uplink subframe 1, and when determining that the channel is idle, transmits uplink data in uplink subframe 1. Meanwhile, UE1 sends preamble code on the reserved resource corresponding to the uplink subframe 2, so that in the subsequent process in the scheduling time period, UE1 does not need to monitor the channel and directly sends uplink data on the uplink subframe 3.

For UE2, as shown in fig. 8, after receiving the broadcasted scheduling related information, UE2 monitors whether the channel is idle in the previous subframe of uplink subframe 1, at this time, UE2 monitors that the channel is busy, and determines that the channel is occupied by LAA uplink data transmission of UE1 according to the resource allocation information, location information, and ID of UE1 and UE3, and at this time, UE2 may send uplink data in uplink subframe 2 because the previous subframe is occupied by LAA uplink data transmission.

For the UE3, as shown in fig. 8, after the UE3 receives the broadcasted scheduling related information, since the WIFI AP receives the CTS frame sent by the LAAeNB base station, the WIFI AP does not send WIFI data within the scheduling time duration of this time, at this time, the UE3 monitors that the channel is idle in the previous subframe of the uplink subframe 2, and the UE3 sends uplink data on the

uplink subframes

2 and 3.

Wherein, in figure 8,

indicating an uplink subframe.

As can be seen from the above description, in this embodiment, a mode of informing the WIFI AP that data cannot be sent within the scheduling duration is further adopted, so that the influence of the WIFI system on the LAA system data is further avoided.

Example four

In order to implement the method according to the embodiment of the present invention, this embodiment provides a UE, as shown in fig. 9, where the UE includes: a receiving unit 91, a resource determining unit 92, and a first transmitting unit 93; wherein the content of the first and second substances,

the receiving unit 91 is configured to receive broadcasted scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE;

the resource determining unit 92 is configured to trigger the sending unit when determining that the allocated resources can be used by using the resource allocation information of all the scheduled UEs this time and combining an LBT mechanism;

the first sending unit 93 is configured to send data on the allocated resource after receiving the trigger of the resource determining unit.

In practical application, the broadcasted scheduling related information may be broadcasted through a PDCCH indication or a control frame of a MAC layer.

The scheduling related information may further include: location information of the scheduled UE and/or an ID of the scheduled UE.

Wherein, the ID of the UE may be TMSI, IMEI, IMSI, or the like.

The resource determining unit 92 is specifically configured to:

monitoring whether a channel corresponding to self-allocated resources is idle, determining that the allocated resources can be used when the channel is determined to be idle, and transmitting data on the allocated resources;

When it is determined that the channel is not occupied by data transmission of the other scheduled UEs, the resource determining unit 92 determines that the allocated resources cannot be used, and at this time, the allocated resources may be occupied by transmission of WIFI data, so that uplink data cannot be transmitted on the allocated resources.

accordingly, the resource determining unit 92 monitors whether a channel corresponding to the resource allocated to itself is idle within the channel monitoring duration.

When the scheduling related information further includes the location information of the scheduled UE, the resource determining unit 92 may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of the other scheduled UEs and the location information of the other scheduled UEs.

When the scheduling related information further includes the ID of the scheduled UE, the resource determining unit 92 may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of other scheduled UEs and the IDs of other scheduled UEs.

When the scheduling related information further includes: when the location information of the scheduled UE and the ID of the scheduled UE are obtained, the resource determining unit 92 may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of other scheduled UEs, the location information of other scheduled UEs, and the IDs of other scheduled UEs.

The first sending unit 93 is further configured to send, in the scheduling time period of this time, channel occupancy information on a reserved resource in resources allocated to other scheduled UEs in all the scheduled UEs of this time when the first UE sends data on the allocated resource, so that the resource determining unit 92 does not need to monitor a channel again in a subsequent process in the scheduling time period of this time, and the number of monitoring times is reduced. Specifically, it is assumed that the UE scheduled in the scheduling period includes: a first UE, a second UE, and a third UE; the resources allocated by the base station to the first UE are the uplink subframe 1 and the uplink subframe 3, but the uplink subframe 2 is not allocated, at this time, the first sending unit 93 of the first UE sends the channel occupancy information on the uplink subframe 2, so that a channel monitoring process before sending data on the uplink subframe 3 can be avoided. If the channel occupancy information is not transmitted, other stations, such as the WIFI station, may monitor channel idle in the uplink subframe 2, so as to start transmitting data in the uplink subframe 2, which may result in that the first transmitting unit 93 of the first UE cannot successfully transmit data in the uplink subframe 3.

Here, the channel occupancy information may be a preamble code.

In practical applications, the receiving unit 91 may be implemented by a receiver in the UE; the resource determining Unit 92 may be implemented by a Central Processing Unit (CPU), a Microprocessor (MCU), a Digital Signal Processor (DSP), or a Programmable logic Array (FPGA) in the UE; the first sending unit 93 may be implemented by a transmitter in the UE.

In order to implement the method according to the embodiment of the present invention, this embodiment further provides a base station, as shown in fig. 10, where the base station includes: resource allocation section 101 and second transmission section 102; wherein the content of the first and second substances,

the resource allocation unit 101 is configured to allocate resources to all the scheduled UEs this time;

the second sending unit 102 is configured to broadcast the scheduling related information of this time; the scheduling related information comprises resource allocation information of all scheduled UEs.

In this embodiment, the specific process of allocating resources to all the scheduled UEs in this time by the resource allocation unit 101 is not limited in this embodiment of the present invention. Such as: the resource allocation unit 101 first obtains how much data of each UE in all the scheduled UEs needs to be sent; and then according to the data volume required to be sent by each UE and by combining the resource condition of the base station where the UE is located, allocating resources for all the scheduled UEs.

The scheduling related information comprises resource allocation information of all scheduled UEs.

Specifically, the second sending unit 102 may broadcast the current scheduling related information through a PDCCH indication or a control frame of the MAC layer.

In an embodiment, the second sending unit 102 is further configured to notify other stations around the base station where the second sending unit is located that data cannot be sent within a specified time period; the specified time period is the time period of the UE scheduled this time, so that the influence of other stations on the data reception sent by the first UE can be effectively avoided.

Specifically, the second sending unit 102 may notify the other stations that the data cannot be sent within a specified time period after an interval SIFS after the scheduling related information is broadcast.

In practical applications, the second sending unit 102 may notify the other stations that data cannot be sent within a specified time period by sending a CTS frame.

The other sites may be WIFI sites, etc.

In practical application, the resource allocation unit 101 and the second sending unit 102 may be implemented by a transceiver combined with a CPU, an MCU, a DSP, or an FPGA in a base station.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a data transmission system, as shown in fig. 11, where the system includes: a base station 111 and a first UE 112; wherein the content of the first and second substances,

the base station 111 is configured to allocate resources to all scheduled UEs this time; broadcasting the scheduling related information;

the first UE112, configured to receive broadcasted scheduling related information; and when the resource allocation information of all the scheduled UEs is utilized and an LBT mechanism is combined, the allocated resources are determined to be available, and data is sent on the allocated resources.

The base station 111 may broadcast the current scheduling related information through a PDCCH indication or a control frame of the MAC layer.

The base station 111 is further configured to notify other stations around itself that data cannot be sent within a specified time period after the scheduling related information is broadcast; the specified time period is a time period for scheduling the UE this time, so that influence of other stations on data reception sent by the first UE 111 can be effectively avoided.

Specifically, the base station 111 may notify the other stations that data cannot be sent within a specified time period after an interval SIFS after the scheduling related information is broadcast.

In practical applications, the base station 111 may notify the other stations that data cannot be transmitted within a specified time period by sending a CTS frame.

The other sites may be WIFI sites, etc.

The first UE112 is specifically configured to:

When it is determined that the channel is not occupied by data transmission of the other scheduled UEs, the first UE112 determines that the allocated resources cannot be used, and at this time, the allocated resources may be occupied by transmission of WIFI data, so that uplink data cannot be transmitted on the allocated resources.

When the scheduling related information further includes: when the channel monitoring duration is long, the first UE112 is configured to monitor whether a channel corresponding to a resource allocated to the first UE is idle in the channel monitoring duration.

When the scheduling related information further includes the location information of the scheduled UE, the first UE112 may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of the other scheduled UEs and the location information of the other scheduled UEs.

When the scheduling related information further includes the ID of the scheduled UE, the first UE112 may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of other scheduled UEs and the IDs of other scheduled UEs.

When the scheduling related information further includes: when the location information of the scheduled UE and the ID of the scheduled UE are obtained, the first UE112 may determine whether the channel is occupied by data transmission of other scheduled UEs according to the resource allocation information of other scheduled UEs, the location information of other scheduled UEs, and the IDs of other scheduled UEs.

The first UE112 is further configured to send, in the process of sending data on the allocated resources, channel occupancy information on reserved resources in resources allocated to other scheduled UEs in all scheduled UEs in the current scheduling time period, so that the first UE112 does not need to monitor a channel in a subsequent process in the current scheduling time period, and the number of monitoring times is reduced. Specifically, it is assumed that the UE scheduled in the scheduling period includes: a first UE, a second UE, and a third UE; the resources allocated by the base station to the first UE are the uplink subframe 1 and the uplink subframe 3, but the uplink subframe 2 is not allocated, and at this time, the first UE sends the channel occupancy information on the uplink subframe 2, so that a channel monitoring process before sending data on the uplink subframe 3 can be avoided. If the channel occupancy information is not sent, other stations, such as WIFI stations, may monitor that the channel is idle in uplink subframe 2, and thus start sending data in uplink subframe 2, which may result in that the first UE cannot successfully send data in uplink subframe 3.

Here, the channel occupancy information may be a preamble code.

It should be noted that: the scheme provided by the embodiment of the invention can be suitable for a TDD system and an FDD system.

In the scheme provided by the embodiment of the invention, the base station 111 allocates resources for all the scheduled UEs at this time; broadcasting the scheduling related information; after receiving the broadcasted scheduling related information, the first UE112 sends data on the allocated resources by using the resource allocation information of all the scheduled UEs in the scheduling related information this time and combining with the LBT mechanism when determining that the allocated resources can be used. Therefore, when the UE determines that the allocated resources can be used, uninterrupted transmission on continuous uplink subframes can be realized, and a plurality of scheduled UEs can perform uplink data transmission without interfering with each other, so that the throughput performance of the network system is greatly improved.

In addition, the first UE112 monitors whether a channel corresponding to a resource allocated to itself is idle; when the channel is determined to be busy, judging whether the channel is occupied by the data transmission of other scheduled UE according to the resource allocation information of other scheduled UE in the resource allocation information of all the scheduled UE; therefore, the UE can accurately know whether the channel is occupied by other scheduled UEs or not, and if the channel is occupied by other scheduled UEs, the UE can send data on the allocated resources, so that uninterrupted transmission on continuous uplink subframes can be realized in the multi-user uplink transmission process, and the throughput performance of a network system is greatly improved.

In addition, after the base station 111 broadcasts the scheduling related information, the base station 111 informs other stations around itself that data cannot be transmitted within a specified time period; the specified time period is the time period of the UE scheduled this time, so that the influence of other stations on the data reception sent by the scheduled UE can be further effectively avoided.

In this scheduled time period, the first UE112 sends the channel occupancy information on the reserved resources in the resources allocated to the other scheduled UEs in all the scheduled UEs, so that the first UE112 does not need to monitor the channel in the subsequent process in this scheduled time period.

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

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

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

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

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method of data transmission, the method comprising:

receiving broadcasted scheduling related information by first User Equipment (UE); the scheduling related information comprises resource allocation information of all scheduled UE;

2. The method of claim 1, wherein after the first UE monitors whether a channel corresponding to the resource allocated to itself is idle, the method further comprises:

when the channel is determined to be idle, the allocated resources are determined to be available for use.

3. The method according to claim 1 or 2, wherein the scheduling related information further includes a channel listening duration of the first UE;

4. The method of claim 1, wherein the broadcasted scheduling related information is broadcasted by a Physical Downlink Control Channel (PDCCH) indication or a control frame of a Medium Access Control (MAC) layer.

5. The method of claim 1, further comprising:

6. The method of claim 5, wherein the channel occupancy information is a preamble code.

7. A method of data transmission, the method comprising:

the base station distributes resources for all the scheduled UE;

the base station broadcasts the scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE; the resource allocation information of all scheduled UEs is used for the scheduled UEs to monitor whether channels corresponding to resources allocated to the scheduled UEs are idle or not, when the channels are determined to be busy, whether the channels are occupied by data transmission of other scheduled UEs is judged according to the resource allocation information of other scheduled UEs in the resource allocation information of all the scheduled UEs, and when the channels are determined to be occupied by the data transmission of other scheduled UEs, the allocated resources are determined to be available.

8. The method according to claim 7, wherein the broadcasting of the scheduling related information of this time is:

9. The method of claim 7, further comprising:

10. The method of claim 9, wherein the base station informs the other stations that data cannot be transmitted within a specified time period after broadcasting the scheduling related information of the current time by a short inter-frame space (SIFS).

11. The method of claim 9, wherein the base station informs other stations around itself that it is not able to send data within a specified time period by sending a Clear To Send (CTS) frame.

12. The method of claim 7, wherein the scheduling related information further comprises: the channel monitoring duration of each UE; the channel monitoring duration is used for monitoring whether a channel corresponding to the self-allocated resource is idle or not by the corresponding UE within the channel monitoring duration.

13. A UE, wherein the UE comprises: the device comprises a receiving unit, a resource determining unit and a first sending unit; wherein the content of the first and second substances,

the resource determining unit is used for monitoring whether a channel corresponding to the self-allocated resource is idle or not; when the channel is determined to be busy, judging whether the channel is occupied by the data transmission of other scheduled UE according to the resource allocation information of other scheduled UE in the resource allocation information of all the scheduled UE; when determining that the channel is occupied by data transmission of other scheduled UEs, determining that the allocated resources can be used, and triggering the sending unit;

14. The UE of claim 13, wherein the first sending unit is further configured to send the channel occupancy information on a reserved resource in resources allocated to other scheduled UEs in all the scheduled UEs in the current scheduled time period.

15. A base station, characterized in that the base station comprises: a resource allocation unit and a second transmission unit; wherein the content of the first and second substances,

the second sending unit is used for broadcasting the scheduling related information of this time; the scheduling related information comprises resource allocation information of all scheduled UE; the resource allocation information of all scheduled UEs is used for the scheduled UEs to monitor whether channels corresponding to resources allocated to the scheduled UEs are idle or not, when the channels are determined to be busy, whether the channels are occupied by data transmission of other scheduled UEs is judged according to the resource allocation information of other scheduled UEs in the resource allocation information of all the scheduled UEs, and when the channels are determined to be occupied by the data transmission of other scheduled UEs, the allocated resources are determined to be available.

16. The base station of claim 15, wherein the second sending unit is further configured to notify other stations around the base station where the second sending unit is located that data cannot be sent within a specified time period; the specified time period is the time period of the UE scheduling.

17. A data transmission system, the system comprising: a base station and a first UE; wherein the content of the first and second substances,

the base station is used for allocating resources to all the scheduled UE; broadcasting the scheduling related information; the scheduling related information comprises resource allocation information of all scheduled UE;

the first UE is used for receiving broadcasted scheduling related information; monitoring whether a channel corresponding to self-allocated resources is idle; when the channel is determined to be busy, judging whether the channel is occupied by the data transmission of other scheduled UE according to the resource allocation information of other scheduled UE in the resource allocation information of all the scheduled UE; determining that the allocated resources are available when it is determined that the channel is occupied by data transmissions of the other scheduled UEs.