CN106658739B

CN106658739B - method, device and system for multi-UE uplink subframe aggregation transmission

Info

Publication number: CN106658739B
Application number: CN201510409039.3A
Authority: CN
Inventors: 柯颋; 刘建军; 沈晓冬; 侯雪颖; 童辉; 王锐
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2015-07-13
Filing date: 2015-07-13
Publication date: 2020-01-31
Anticipated expiration: 2035-07-13
Also published as: CN106658739A

Abstract

The invention discloses multi-UE uplink subframe aggregation transmission method, device and system, which aim to solve the problem of low data transmission efficiency of UL service on an unauthorized frequency band.A base station determines that a channel is occupied by th UE served by the base station, determines that the occupation time of th UE on the current channel is less than the preset maximum transmission time, selects at least UEs with occupation time less than the residual available transmission time of the current channel from other UEs which are not occupied by the base station as scheduling UEs, sends an L1 layer signaling to the scheduling UEs, indicates the scheduling UEs to try to occupy the current channel after the UE releases the current channel, and tries to occupy the current channel based on the L1 layer signaling when the scheduling UEs receive the L1 layer signaling sent by the base station, so that the th UE can be fully utilized to transmit UL data in the residual available transmission time of the current channel, and the UL data transmission efficiency is improved.

Description

method, device and system for multi-UE uplink subframe aggregation transmission

Technical Field

The invention relates to the technical field of network communication, in particular to multi-UE uplink subframe aggregation transmission method, device and system.

Background

In order to enable a heterogeneous system or a heterogeneous operator to compete for using the unlicensed frequency band fairly, a Listen Before Talk (LBT) mechanism is introduced, that is, time is reserved before data transmission is performed each time to sense a carrier, a Clear Channel Assessment (CCA) process is performed, data transmission is performed only when the carrier is sensed to be available, and the maximum duration of data transmission is limited each time.

In order to ensure the reliability of service transmission on the unauthorized frequency band, an authorized frequency band (L-band) can be adopted to assist the unauthorized frequency band in service transmission, the reliability of the authorized frequency band is combined with the abundant bandwidth resources of the unauthorized frequency band, and the system throughput is improved while the reliability of service transmission is ensured. Specifically, in order to ensure the performance of LTE in the unlicensed frequency band, the current protocol requires that an LTE technology is used in the unlicensed frequency band by Carrier Aggregation (CA) or dual connectivity. In the CA mode, a carrier on an authorized frequency band is used as a main carrier, and a carrier on an unauthorized frequency band is used as an auxiliary carrier, so that an unauthorized frequency band access mode assisted by the authorized frequency band, i.e., assisted authorized access (LAA), is implemented.

The UE also needs to comply with the LBT specification when the UE is allowed to transmit uplink data on the U-band, so that the uplink transmission of the UE on the U-band is an opportunistic transmission, i.e., the UE does not contend successfully for a channel access opportunity each time when the UE is scheduled.

In the WIFI system, the single data transmission duration is referred to as transmission opportunity (TXOP). of course, in different countries or regions, or different communication systems, the TXOP is referred to differently.

The LBT mechanism requires reserved time periods to sense the carrier before each data transmission, a Clear Channel Assessment (CCA) procedure is performed, and data transmission is started when the carrier is sensed to be available.

After successful contention to the transmitter opportunity, DL transmission opportunities (containing multiple DL subframes, each lasting 1 ms) can transmit data to multiple UEs simultaneously in a Physical Downlink Control Channel (PDCCH) by Time Division (TDM)/Frequency Division Multiplexing (FDM) manner after the eNB successfully contends for the transmitter opportunity generally, because of the large number of UEs and hence the large amount of DL traffic, the eNB always needs to transmit a large amount of DL data, and thus DL transmissions can usually occupy the maximum transmission opportunities, thereby obtaining maximum transmission efficiency on a limited basis.

Further , for a multi-UE scenario, referring to fig. 1A and 1B, the total UL/DL traffic transmission efficiency of multiple UEs is analyzed, assuming that the UL/DL traffic of each UE is the same and the data volume of a single UE is not large, for example, the maximum TXOP time constraint is 10ms, and UE1 uses only 3ms this time, UE2 and UE3 use only 2 ms. for DL transmission (see fig. 1A) this time, and eNB initiates contention for channel resources, after eNB successfully contends for a transmitter, under the condition of maximum TXOP permission, DL data of multiple UEs can be transmitted times, so the DL transmission efficiency is higher, and for UL transmission (see fig. 1B), contention for channel resources is freely initiated by a single UE, i.e., multiple UEs compete for UL channel resources independently, after UE successfully contends for a transmitter, times can only transmit UL data of 1 UE, because there are many contenders on the U-band (e., many other operators or other operators, and there are usually there are more symmetric UL transmission time intervals between UEs, so there are no UL data transmission efficiency is much lower than the UL data transmission efficiency of a symmetrical UL transmission.

In view of the above, according to the requirement of the spectrum specification on the unlicensed frequency band, the UE needs to comply with the LBT specification when transmitting UL data on the U-band, in the LAA multi-UE application scenario, the DL traffic and the UL traffic have serious asymmetry in data amount, so that when multiple UEs compete for UL channel resources independently, the data transmission efficiency of the UL traffic is far lower than that of the DL traffic, that is, there is serious asymmetry in UL/DL data transmission efficiency, and step causes serious resource waste.

Disclosure of Invention

The invention aims to provide multi-UE uplink subframe aggregation transmission methods, devices and systems to solve the problem of low data transmission efficiency of UL (uplink) services on an unlicensed frequency band.

The purpose of the invention is realized by the following technical scheme:

an th aspect provides methods for multi-UE uplink subframe aggregation transmission, comprising:

the base station judges that the current channel is occupied by th UE served by the base station, and determines that th UE selects at least UE with the channel occupying time less than the residual available transmission time of the current channel from other UE which is served by the base station and does not occupy the current channel as scheduling UE when the occupying time of the current channel is less than the preset maximum transmission time;

and the base station sends uplink downlink control information (UL DCI) signaling to the scheduling UE to indicate the scheduling UE to try to occupy the current channel after the th UE releases the current channel.

Therefore, because the th UE occupies the current channel for a time less than the preset maximum transmission duration, that is, after the th UE releases the current channel, the remaining available transmission duration exists in the current channel, the base station instructs the scheduling UE to fully utilize the remaining available transmission duration of the current channel to occupy the current channel for UL data transmission, so that the UL data transmission efficiency can be effectively improved, and the channel resource utilization rate is further improved .

Optionally, uplink data transmission between the scheduling UEs is not interfered with each other.

Optionally, the th UE and the scheduling UE are in the same or similar geometric and geographic location.

Optionally, the operating spectrum of the current channel is an unlicensed spectrum.

Optionally, the sending, by the base station, the UL DCI signaling to the scheduling UE to instruct the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel includes:

the base station sends UL DCI signaling to the scheduling UE at the first k-1 subframes of the transmission ending subframe of the UE on the current channel, and the scheduling UE is indicated to try to occupy the current channel after the UE releases the current channel, wherein the size of k is preset.

Optionally, the base station sends an UL DCI signaling to the scheduling UE to instruct the scheduling UE to try to occupy the current channel after the th UE releases the current channel, and step includes:

after the base station determines that the total occupied time of all the selected scheduling UEs and th UEs is not less than the preset maximum transmission time when the scheduling UE occupies the current channel, the base station continuously selects at least UEs with channel occupied time less than the remaining available transmission time of the current channel from the UE group as new scheduling UEs, wherein uplink data transmission among the new scheduling UEs is not interfered with each other;

the base station sends UL DCI signaling to the new scheduling UE to indicate the new scheduling UE to try to occupy the current channel after the scheduling UE selected for times releases the current channel, and the steps are repeated

A second aspect provides a method for multi-UE uplink subframe aggregation transmission, including:

any schedules the UE to receive an Uplink Downlink control information (UL DCI) signaling sent by the base station;

the arbitrary schedules the UE to attempt to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling.

Thus, when the UE scheduled by any receives the UL DCI signaling, it can be determined that the remaining available transmission time length exists in the current channel, and therefore, the UE scheduled by any can fully utilize the remaining available transmission time length of the current channel to occupy the current channel for UL data transmission, so that the UL data transmission efficiency is improved, and further improves the channel resource utilization rate.

Optionally, the arbitrary schedules the UE to receive the UL DCI signaling, and attempts to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling, which specifically includes:

when the arbitrary schedules the UE to receive the UL DCI signaling, directly occupying the current channel at the channel access subframe indicated by the UL DCI signaling based on the UL DCI signaling, or,

when the arbitrary schedules the UE to receive the UL DCI signaling, based on the UL DCI signaling, starting times of extra listening at the listening subframe indicated by the UL DCI signaling, and determining that the current channel occupies the current channel when idle through the extra listening, or,

and when the arbitrary scheduling UE receives the UL DCI signaling, restarting a system monitoring process at a monitoring subframe indicated by the UL DCI signaling based on the UL DCI signaling, and determining that the current channel occupies the current channel when the current channel is idle through system monitoring.

The third aspect provides a method for multi-UE uplink subframe aggregation transmission, including:

a base station sends UL resource scheduling signaling to all UE served by the base station to indicate that when the UE successfully competes for a channel access opportunity, the UL resource indicated by the UL resource scheduling signaling is used for UL transmission;

and the base station sends L1-layer transmission opportunity indication signaling to the scheduling UE to indicate the scheduling UE to try to occupy the current channel after the UE releases the current channel.

Optionally, the determining, by the base station, that the current channel is occupied by the th UE served by the base station, specifically includes:

the base station determines UE to successfully compete to the channel access opportunity based on the UL resource scheduling signaling, when the UL resource indicated by the UL resource scheduling signaling is utilized for uplink transmission, the base station determines that the current channel is occupied by UE in the UE group, or,

the base station determines that the th UE unsuccessfully competes to the channel access opportunity based on the UL resource scheduling signaling, sends L1 layer transmission opportunity indication signaling to the th UE, indicates the th UE to continue to compete for the channel access opportunity, determines that the th UE successfully competes to the channel access opportunity, and determines that the current channel is occupied by the th UE in the UE group when the UL resource indicated by the UL resource scheduling signaling is used for uplink transmission.

Optionally, the sending, by the base station, an L1 layer transmission opportunity indication signaling to the scheduling UE to indicate the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel includes:

the base station sends the L1 layer transmission opportunity indication signaling to the scheduling UE at the first p-1 subframes of the transmission ending subframe of the UE on the current channel, and indicates the scheduling UE to try to occupy the current channel after the UE releases the current channel, wherein the size of L is determined by the indication mode of the L1 layer transmission opportunity indication signaling.

Optionally, the base station sends L1 layer transmission opportunity indication signaling to the scheduling UE, indicating that the scheduling UE attempts to occupy the current channel after the th UE releases the current channel, and step includes:

and the base station sends L1-layer transmission opportunity indication signaling to the new scheduling UE, and indicates the new scheduling UE to try to occupy the current channel after the scheduling UE selected last times releases the current channel, and the steps are repeated.

A fourth aspect provides a method for multi-UE uplink subframe aggregation transmission, including:

any scheduling UE to receive L1 layer transmission opportunity indication signaling sent by the base station;

the anybody schedules the UE to attempt to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling under the trigger of the L1 layer transmission opportunity indication signaling.

Therefore, when the arbitrary scheduling UE receives the L1 layer transmission opportunity indication signaling, it can be determined that the remaining available transmission time length exists in the current channel, and therefore, the arbitrary scheduling UE can fully utilize the remaining available transmission time length of the current channel to occupy the current channel for UL data transmission, thereby improving the UL data transmission efficiency and further improving the channel resource utilization rate .

Optionally, the operating spectrum of the current channel is an unlicensed spectrum

Optionally, the scheduling UE of arbitrary attempts to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling under the trigger of the L1 layer transmission opportunity indication signaling, which specifically includes:

when the arbitrary schedules the UE to receive the L1 layer transmission opportunity indication signaling, under the triggering of the L1 layer transmission opportunity indication signaling, directly occupying the current channel at the channel access subframe indicated by the L1 layer transmission opportunity indication signaling, or,

when the arbitrary schedules the UE to receive the L1 layer transmission opportunity indication signaling, under the triggering of the L1 layer transmission opportunity indication signaling, starting times of additional listening at the listening subframe indicated by the L1 layer transmission opportunity indication signaling, and occupying the current channel when the current channel is determined to be idle through the additional listening, or,

when the arbitrary scheduling UE receives the L1 layer transmission opportunity indication signaling, under the triggering of the L1 layer transmission opportunity indication signaling, restarting a system listening process at a listening subframe indicated by the L1 layer transmission opportunity indication signaling, and occupying a current channel when the current channel is determined to be idle through system listening.

A fifth aspect provides a multi-UE uplink subframe aggregation transmission apparatus, including:

an th selecting unit, configured to determine that the current channel is occupied by th UE served by the UE itself, and determine that the th UE selects, from other UEs not occupying the current channel served by the UE itself, at least UEs whose channel occupying time is less than the remaining available transmission time of the current channel as scheduling UEs when the occupying time of the current channel is less than the preset maximum transmission time;

an th sending unit, configured to send an uplink downlink control information (UL DCI) signaling to the scheduled UE, indicating that the scheduled UE attempts to occupy the current channel after the th UE releases the current channel.

Optionally, the uplink data transmission between the scheduling UEs selected by the th selecting unit is not interfered with each other.

Optionally, the sending unit is specifically configured to, when sending an UL DCI signaling to the scheduling UE to indicate the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel:

transmitting ULDCI signaling to the scheduling UE at the first k-1 subframes of the transmission end subframe of the UE on a current channel, indicating that the scheduling UE attempts to occupy the current channel after the UE releases the current channel, wherein the size of k is preset.

Optionally, an UL DCI signaling is sent to the scheduling UE to indicate that the scheduling UE attempts to occupy the current channel after the current channel is released by the th UE, and the selecting unit is further configured to:

after the scheduling UE occupies the current channel, determining that the total occupied time of all selected scheduling UE and th UE in the current channel is not less than the preset maximum transmission time, and continuously selecting at least UE with the channel occupied time less than the residual available transmission time of the current channel from the UE group as new scheduling UE, wherein uplink data transmission among the new scheduling UE is not interfered with each other;

and sending UL DCI signaling to the new scheduling UE, and indicating the new scheduling UE to try to occupy the current channel after the scheduling UE selected for times releases the current channel, and so on.

A sixth aspect provides apparatus for multi-UE uplink subframe aggregation transmission, including:

a receiving unit, configured to receive an uplink downlink control information uldi signaling sent by the apparatus according to the fifth aspect;

an processing unit for attempting to occupy a current channel indicated by the UL DCI signaling based on the UL DCI signaling.

Optionally, when the UL DCI signaling is received and the current channel indicated by the UL DCI signaling is attempted to be occupied based on the UL DCI signaling, the -th processing unit is specifically configured to:

when the UL DCI signaling is received, directly occupying a current channel at a channel access subframe indicated by the UL DCI signaling based on the UL DCI signaling; or the like, or, alternatively,

when the UL DCI signaling is received, based on the UL DCI signaling, times of extra interception are started at the interception subframe indicated by the UL DCI signaling, and the current channel is occupied when the current channel is determined to be idle through the extra interception, or,

and when the UL DCI signaling is received, restarting a system monitoring process at a monitoring subframe indicated by the UL DCI signaling based on the UL DCI signaling, and determining that the current channel occupies the current channel when the current channel is idle through system monitoring.

A seventh aspect provides kinds of base station devices, including the uplink subframe aggregation transmission apparatus described in any of the fifth aspect.

An eighth aspect provides user equipment, including the uplink subframe aggregation transmission apparatus of any of the sixth aspect.

A tenth aspect of selecting at least UEs from other UEs served by the UE and not occupying the current channel, where the channel occupying time of the UEs is less than the remaining available transmission duration of the current channel provides multi-UE uplink subframe aggregation transmission apparatuses, including:

a second sending unit, configured to send an UL resource scheduling signaling to all UEs served by the second sending unit, so as to indicate that, when the UE successfully competes for a channel access opportunity, the UL resource indicated by the UL resource scheduling signaling is used for UL transmission;

a second selecting unit, configured to determine that a current channel is occupied by th UE served by the UE, and determine that th UE selects, as scheduling UE, at least UEs whose channel occupancy time is less than the remaining available transmission time of the current channel from other UEs that are not occupied by the current channel and served by the UE when the occupancy time of the current channel is less than a preset maximum transmission time;

a third sending unit, configured to send an L1-layer transmission opportunity indication signaling to the scheduling UE, indicating that the scheduling UE attempts to occupy the current channel after the th UE releases the current channel.

Optionally, uplink data transmission between the scheduling UEs selected by the second selecting unit is not interfered with each other.

Optionally, it is determined that the current channel is occupied by the th UE served by the current channel, and the second selecting unit is specifically configured to:

determining that the th UE successfully competes for a channel access opportunity based on the UL resource scheduling signaling, and determining that a current channel is occupied by the th UE in the UE group when the UL resource indicated by the UL resource scheduling signaling is utilized for uplink transmission, or,

determining that the th UE does not successfully contend for the channel access opportunity based on the UL resource scheduling signaling, causing the third transmitting unit to transmit an L1 layer transmission opportunity indication signaling to the th UE, indicating the th UE to continue contending for the channel access opportunity, determining that the th UE successfully contends for the channel access opportunity, and determining that the current channel is occupied by the th UE in the UE group when performing uplink transmission by using the UL resource indicated by the UL resource scheduling signaling.

Optionally, the third sending unit is specifically configured to send an L1 layer transmission opportunity indication signaling to the scheduling UE, to indicate the scheduling UE to try to occupy the current channel after the th UE releases the current channel:

transmitting the L1 layer transmission opportunity indication signaling to the scheduling UE at the first p-1 subframes of the transmission end subframe of the UE on the current channel, indicating that the scheduling UE attempts to occupy the current channel after the UE releases the current channel, wherein the size of L is determined by the indication manner of the L1 layer transmission opportunity indication signaling.

Optionally, an L1 layer transmission opportunity indication signaling is sent to the scheduling UE to indicate that the scheduling UE tries to occupy the current channel after the th UE releases the current channel, and the second selecting unit is further configured to:

and sending L1 layer transmission opportunity indication signaling to the new scheduling UE, indicating the new scheduling UE to try to occupy the current channel after the last times of selected scheduling UEs release the current channel, and so on.

A tenth aspect provides a apparatus for multi-UE uplink subframe aggregation transmission, comprising:

a second receiving unit, configured to receive an L1 layer transmission opportunity indication signaling sent by the apparatus in the tenth aspect;

a second processing unit, configured to attempt to occupy a current channel indicated by the L1 layer transmission opportunity indication signaling under the trigger of the L1 layer transmission opportunity indication signaling.

Optionally, under the trigger of the L1 layer transmission opportunity indication signaling, when attempting to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling, the second processing unit is specifically configured to:

when the L1 layer transmission opportunity indication signaling is received, under the triggering of the L1 layer transmission opportunity indication signaling, directly occupying a current channel at a channel access subframe indicated by the L1 layer transmission opportunity indication signaling; or the like, or, alternatively,

when the L1 layer transmission opportunity indication signaling is received, under the triggering of the L1 layer transmission opportunity indication signaling, times of additional listening is started at a listening subframe indicated by the L1 layer transmission opportunity indication signaling, and the current channel is occupied when the current channel is determined to be idle through the additional listening, or,

and when the L1 layer transmission opportunity indication signaling is received, under the triggering of the L1 layer transmission opportunity indication signaling, restarting a system interception process at an interception subframe indicated by the L1 layer transmission opportunity indication signaling, and determining that a current channel occupies the current channel when the current channel is idle through system interception.

A twelfth aspect provides kinds of base station devices, including the uplink subframe aggregation transmission degree apparatus of any of the tenth aspect.

A thirteenth aspect provides user equipment, comprising the uplink subframe aggregation transmission apparatus of any in the tenth aspect.

The fourteenth aspect provides uplink subframe aggregation transmission systems, which comprise the base station according to the tenth aspect and the UE according to the tenth , wherein the th UE served by the UE occupies, and selects at least UEs, which occupy time is less than the remaining available transmission time of the current channel, from other UEs, which are served by the UE and do not occupy the current channel

Drawings

Fig. 1A and 1B are schematic diagrams of DL traffic and UL traffic transmission opportunities in a multi-UE scenario in the prior art;

FIG. 2 is a schematic diagram of multiple UE groups;

fig. 3 is a flowchart illustrating an method for aggregate transmission of uplink subframes of multiple UEs applied to a network side according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a multi-UE UL subframe aggregation transmission method based on multiplexing of existing UL DCI signaling;

fig. 5 is a flowchart illustrating methods for aggregate transmission of uplink subframes of multiple UEs applied to a terminal side according to an embodiment of the present invention;

fig. 6A and 6B are schematic diagrams of two multi-UE UL subframe aggregation transmissions;

FIG. 7 is a schematic diagram of a hidden node problem for a UE group;

fig. 8 is a flowchart illustrating another methods for aggregating and transmitting uplink subframes of multiple UEs applied to a network side according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a UL subframe aggregation scheduling method based on L1 layer transmission opportunity indication signaling;

fig. 10 is a flowchart illustrating another method for multi-UE uplink subframe aggregation transmission applied to a terminal side according to an embodiment of the present invention;

fig. 11 is a schematic flowchart of the prior LAA LBT mechanism;

fig. 12 and fig. 15 are schematic structural diagrams of a multi-UE uplink subframe aggregation transmission apparatus applied to a network side in an embodiment of the present invention;

fig. 13 and fig. 16 are schematic structural diagrams of a multi-UE uplink subframe aggregation transmission apparatus applied to a terminal side in an embodiment of the present invention;

fig. 14 and fig. 17 are schematic structural diagrams of a multi-UE uplink subframe aggregation transmission system in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of the present invention , and not all embodiments.

For UL transmissions, times only allow transmission of 1 UE UL data after a single UE successfully contends for a transmission opportunity if it is fully relied on that the single UE is free to initiate contention for channel resources.

In view of the above problems, the present invention proposes UL transmission efficiency enhancement ideas, that is, proposes base station (eNB) -assisted multi-UE UL subframe aggregation transmission methods, and if a certain UE has obtained a long available transmission time period but actually has no large amount of data transmission, the eNB can immediately schedule other UEs to compete for channel resources next to the preceding UE, so as to fully utilize the remaining available transmission time of the preceding UE.

, under coordinated scheduling of the eNB, multiple UEs compete for whole groups of UEs (UE groups) and use UL channel resources, specifically, multiple UEs with a large overlap ratio of CCA listening ranges are configured to UE groups, and at this time, CCA listening results of different UEs in a group have strong substitution.

For example, referring to fig. 2, each UE has CCA listening ranges, when CCA listening ranges of multiple UEs are close to overlapping, CCA listening results of these UEs have strong alternatives, that is, CCA listening results of other UEs may be used instead of CCA listening results of the UE, so that a group of UEs meeting the above properties is referred to as a UE group.

The CCA range is determined by the CCA interception limit, and the CCA interception limit (CCA threshold, TH)_CCA) Is defined as the total power level value received by a particular receiving end: that is, when the total power level actually received by the receiving end is less than or equal to TH_CCAThe receiver declares the channel idle; otherwise, the receiver declares the channel occupied.

In general, all UEs' CCA listens for a TH limit_CCAAre defined to be values, therefore, the CCA listening ranges of two UEs are completely coincident, meaning that the geometric geographical locations of the two UEs are completely identical, step , if the CCA listening ranges of all UEs within UE groups are nearly coincident, meaning that the geometric geographical locations of the several UEs are relatively close, of course, different UEs are not excluded from defining different CCA listening limits TH_CCAAt this time, the CCA listening ranges of all UEs in the group of UEs are nearly coincident, which means that the geometric geographical locations of these UEs are relatively close in aspect, and the CCA listening ranges of these UEs are TH-limiting in aspect_CCAAnd are also equal.

In summary, the close geometric geographic locations of several UEs are necessary for the CCA listening ranges of the several UEs to be close to coincidence. In fact, the eNB may determine the geometric geographical location of the UE through a variety of techniques, such as:

1) the UE-side autonomous positioning technology is applicable to outdoor non-sheltered environments, and the eNB can acquire the geometric geographical position information of the UE in a mode of requiring the UE to report the spatial position of the UE.

2) Based on eNB side channel estimation technology: the eNB side has a Multiple Input Multiple Output (MIMO) smart antenna. When estimating the channel quality of the transmission path from the UE side to the eNB side, the MIMO antenna actually obtains information such as an arrival azimuth angle and an arrival channel strength of the main transmission path, and these information can be used to assist in resolving the geometric and geographic location information of the UE.

3) Signal fingerprint based (fingerprint) method: the basic principle of the method is that the received signals from multiple enbs have a specific interference pattern at a specific geometrical geographical location. These interference patterns are similar to human fingerprints and have strong discrimination between them. Therefore, the UE can roughly determine the self geometric geographic position through the channel measurement and pattern map matching technology and then report the geometric geographic position to the eNB for knowing;

4) based on a combination of the above techniques or other techniques.

It should be understood that there is certain measurement bias in the above-mentioned UE geometric geographical location positioning technology, and the geographical locations of multiple UEs may not be completely coincident, so there will always be certain bias in CCA listening ranges of multiple UEs within a UE group.

In another aspect, the eNB is able to have full knowledge of the UE's UL traffic needs.

After the eNB determines the CCA listening range of the UE, the eNB divides the CCA listening range to approximately coincide, and multiple UEs all having UL traffic divide UE groups, and schedules the same or overlapping UL spectrum resources for the UEs in the group.

Specifically, referring to fig. 3, an embodiment of the present invention provides methods for aggregating and transmitting uplink subframes of multiple UEs, which are applied to a network side, and the specific steps are as follows:

step 300, the base station judges that the current channel is occupied by th UE served by the base station, and determines that th UE selects at least UEs, of which the channel occupying time is less than the remaining available transmission time of the current channel, as scheduling UEs from other UEs, which are served by the base station and do not occupy the current channel, when the occupying time of the current channel is less than the preset maximum transmission time.

The scheduling method comprises the steps of scheduling UE, wherein uplink data transmission among the scheduling UE is not interfered with each other, th UE and the scheduling UE are identical or similar in geometric and geographic position and are divided into UE groups by a base station, and the working frequency spectrum of the current channel is an unlicensed frequency spectrum.

For example, UE0 in a certain UE group divided by the base station already occupies some frequency bands on the unlicensed spectrum, and UE1 and UE2 use different frequency bands when transmitting uplink data, so that UE1 and UE2 may be regarded as uplink data transmission non-interfering and may be both used as scheduling UEs.

Step 301, the base station sends UL DCI signaling to the scheduling UE to instruct the scheduling UE to try to occupy the current channel after the th UE releases the current channel.

Specifically, the base station sends an UL DCI signaling to the scheduling UE, instructing the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, which is specifically referred to as that the base station sends the UL DCI signaling to the scheduling UE at k-1 subframes before the th UE transmits an end subframe on the current channel, and instructs the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, where the size of k is preset.

, the base station sends a UL DCI signaling to the scheduling UE, instructs the scheduling UE to try to occupy the current channel after the UE releases the current channel, determines that all selected scheduling UEs and UEs continue to select at least UEs with channel occupation time less than the remaining available transmission time of the current channel from the UE group as new scheduling UEs when the total occupation time of the current channel is not less than the preset maximum transmission time, wherein uplink data transmission between the new scheduling UEs is not interfered with each other, and sends the UL DCI signaling to the new scheduling UE, instructs the new scheduling UE to try to occupy the current channel after times of previous selected scheduling UEs release the current channel, and so on.

In the conventional LTE UL scheduling technique, the eNB schedules UL resources for all served UEs in a centralized manner, and the eNB notifies the relevant UEs of the allocated UL resource scheduling information through a Physical Downlink Control Channel (PDCCH), and the frequency domain location information of the scheduled UL resources is explicitly carried in the UL DCI format, while the time domain subframe location of the scheduled UL resources is determined by implicit rules, and the time domain subframe location (n + k) of the scheduled UL resources has a definite time interval relationship with the subframe (n) where the UL DCI signaling is located.

In the multi-UE uplink subframe aggregation transmission method in fig. 3, in order to multiplex the existing LTE UL DCI signaling, the eNB needs to accurately decide the timing for sending the UL DCI signaling by itself, that is, the eNB needs to schedule "pick-up cars" UE. at the (k-1) subframes just before the upper UE transmission end subframe (assumed to be the mth subframe) (i.e., the mth-k +1 subframe), which is shown in fig. 4.

Fig. 4 is a schematic diagram of a multi-UE UL subframe aggregation transmission method based on multiplexing of existing UL DCI signaling. The technology has the advantages that the existing LTE technology can be reused as much as possible, the standard is changed slightly, and the main defect is that higher limitation and requirement are put forward on the minimum UL traffic of the UE, namely when the UL traffic of the UE is smaller, the technology is difficult to use.

Specifically, as shown in fig. 4, assuming that preamble UE obtains a transmission opportunity at the nth subframe, eNB confirms that preamble UE obtains a UL transmission opportunity at least at the nth subframe, and schedules UE. earlier than the nth +1 subframe, assuming that preamble UE completes a single transmission at the mth subframe, it can be seen from fig. 4 that there is a mathematical relationship constraint that m-k +1 ≧ n +1, the maximum duration of a single effective transmission of preamble UE is required to be m-n +1 ≧ k + 1.

In particular, for FDD systems, k is 4, and for TDD, k is determined by the uplink and downlink subframe matching mode of TDD, and k is greater than or equal to 4, thus requiring that the maximum duration of a single effective transmission of a preamble UE be m-n +1 greater than or equal to k +1 greater than or equal to 5, i.e. the UL transmission of a preamble UE must last for 5 subframes at minimum to meet the minimum requirement of the multiple UE UL subframe aggregation transmission scheduling required in the present case, under scenarios, the UL traffic of many UEs may be less than 5 subframes, thus limiting the effective use of the technique.

Based on the foregoing multi-UE uplink subframe aggregation transmission method implemented by the network side in fig. 3, an embodiment of the present invention further provides types of multi-UE uplink subframe aggregation transmission methods implemented by the terminal side, as shown in fig. 5, including the following steps:

step 500, any schedules the UE to receive the UL DCI signaling sent by the base station.

Step 501, any schedules the UE to attempt to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling.

Specifically, the geometric geographic locations of the scheduling UEs are the same or similar, and the current channel operates on the unlicensed spectrum.

Specifically, any schedules a UE (hereinafter referred to as UE a), receives the UL DCI signaling, and when attempting to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling, UE a optionally occupies the current channel in of the following three execution manners.

is that UE A receives the UL DCI signaling, and based on the UL DCI signaling, directly occupies the current channel at the channel access subframe indicated by the UL DCI signaling.

The second way is that UE A receives the UL DCI signaling, based on the UL DCI signaling, times of extra listening, namely, extra listening for periods of time, are started at the listening subframe indicated by the UL DCI signaling, and the current channel is occupied when the current channel is determined to be idle through the extra listening.

The third mode is as follows: UE A receives the UL DCI signaling, based on the UL DCI signaling, the system interception process is restarted at the interception subframe indicated by the UL DCI signaling, and the current channel is occupied when the current channel is determined to be idle through system interception.

Optionally, the signaling may also specify enhanced LBT sensing techniques for the UE, that is, turn on additional sensing, at this time, the UE needs to change its LBT behavior after receiving the signaling, and when the UE performs the LBT operation at the position indicated by the L1 layer UL DCI signaling, the UE can obtain a UL transmission opportunity with a greater probability, and its external effect on the UE group is that after a certain UE competes for UL channel resources, other UEs in the group start using channel resources in a "pick-up-and-go" manner .

Specifically, fig. 6A and 6B are schematic diagrams of two kinds of multi-UE UL subframe aggregation transmission, in fig. 6A, a scheduled subsequent UE (pick-up car) is allowed not to follow the LBT rule, and in fig. 6B, the subsequent UE (pick-up car) is required to follow the LBT rule by force, so that the requirement that the subsequent scheduled UE (pick-up car) must follow the LBT rule by force is based on two aspects, namely , in many regions (e.g. japan, europe, usa, etc.), the UL LBT mechanism is required to be implemented by force by the spectrum regulation specification, and , in an actual working scenario where the CCA listening ranges of the multi-UE are not completely overlapped, the UL LBT mechanism is beneficial to suppressing the "hidden node" interference problem.

Fig. 7 is a schematic diagram of a hidden node problem, in particular, the th UE, i.e. the head-ranked UE, in multiple-UE subframe aggregation transmission opportunities is referred to as a sentinel user (Guard UE), while the other scheduled UEs are referred to as follower users (follower UEs) assuming that UE1 is the (sentinel) UE, UE2 is the scheduled (follower) UE, UE1 and UE2 are geographically close, but their CCA listening coverage still has a discrepancy of .

As the transmission duration of k +1 subframes in the multi-UE uplink subframe aggregation transmission method implemented by the network side in fig. 3 is limited, and effective use of multi-UE uplink subframe aggregation transmission is restricted in many scenarios, as shown in fig. 8, multi-UE uplink subframe aggregation transmission methods applied to the network side are further provided in the embodiment of the present invention, which include the following steps:

step 800: and the base station sends UL resource scheduling signaling to all the UE served by the base station to indicate that the UE uses the UL resource indicated by the UL resource scheduling signaling for UL transmission when successfully contending for the channel access opportunity.

Specifically, uplink data transmission among all scheduling UEs is not interfered with each other, th UE and the scheduling UE have the same or similar geometric and geographic positions and are divided into UE groups by a base station, and the working frequency spectrum of the current channel is an unlicensed frequency spectrum.

Step 801, the base station judges that the current channel is occupied by th UE served by the base station, and determines that th UE selects at least UEs, of which the channel occupying time is less than the remaining available transmission time of the current channel, as scheduling UEs from other UEs which are served by the base station and do not occupy the current channel when the occupying time of the current channel is less than the preset maximum transmission time.

Step 802, the base station sends L1 layer transmission opportunity indication signaling to the scheduling UE, indicating the scheduling UE to try to occupy the current channel after the th UE releases the current channel.

Specifically, the base station determines that the current channel is occupied by the th UE in the UE group, including the following two cases:

case, the base station determines UE successfully contends to the channel access opportunity based on the UL resource scheduling signaling, and when the UL resource indicated by the UL resource scheduling signaling is utilized for uplink transmission, the base station determines that the current channel is occupied by UE in the UE group.

In this case, the UL resource scheduling signaling (called Signaling A) indicates times for the UE, while the L1 layer transmission opportunity indication signaling (called Signaling B) does not indicate, and the Signaling B indicates times or more for the other UEs in the UE group.

And in the second situation, the base station determines that the th UE does not successfully compete to the channel access opportunity based on the UL resource scheduling signaling, sends L1-layer transmission opportunity indication signaling to the th UE, indicates the th UE to continue to compete for the channel access opportunity, determines that the th UE successfully competes to the channel access opportunity, and determines that the current channel is occupied by the th UE in the UE group when the UL resource indicated by the UL resource scheduling signaling is used for uplink transmission.

In this case, the eNB selects UEs in the UE group and sends signaling B for them free to contend for the channel access opportunity, after the eNB determines that the channel is occupied by UEs, it continues to select candidate scheduled UEs and sends signaling B for them, at which point the eNB may send signaling B multiple times to increase its probability of contending for the channel through coordinated scheduling in the UE group, letting 7 of the UE group only non-interfering UEs contend for the channel access attempt, if UEs have not contended for the channel access opportunity, the eNB may send signaling B multiple times to increase its probability of contending for the channel, and the eNB may automatically fail to receive signaling A before it receives an optional signaling A that fails before it receives signaling B.

Specifically, the base station sends L1 layer transmission opportunity indication signaling to the scheduling UE to indicate the scheduling UE to attempt to occupy the current channel after the UE releases the current channel, and the specific process is that the base station sends the L1 layer transmission opportunity indication signaling to the scheduling UE at the first p-1 subframes of a transmission ending subframe of the UE on the current channel to indicate the scheduling UE to attempt to occupy the current channel after the UE releases the current channel, wherein the size of L is determined by the indication mode of the L1 layer transmission opportunity indication signaling.

The L1 layer transmission opportunity indication signaling, that is, the signaling B has two indication modes to indicate the CCA listening opportunity, and indicates the CCA listening opportunity explicitly or implicitly, the explicit indication mode is to include fields in the signaling B to indicate that the UE needs to start contending for the channel access opportunity after + L, and the implicit rule mode is to start contending for the channel access opportunity at the L-th subframe after the signaling B is received by the UE, typically, L is 1.

, the base station sends L1 layer transmission opportunity indication signaling to the scheduling UE, indicates the scheduling UE to continue to occupy the current channel after the th UE releases the current channel, determines that all the selected scheduling UEs and the th UE continue to select at least UEs with channel occupation time less than the remaining available transmission time of the current channel from the UE group as new scheduling UEs when the total occupation time of the current channel is not less than the preset maximum transmission time, wherein uplink data transmission among the new scheduling UEs is not interfered with each other, and sends L1 layer transmission opportunity indication signaling to the new scheduling UE, indicates the new scheduling UE to attempt to occupy the current channel after the last times of selected scheduling UEs release the current channel, and so on.

The multi-UE uplink subframe aggregation transmission method applied to the network side in FIG. 8 introduces a long-acting UL resource scheduling mechanism, i.e., eliminates a determined timing relationship between a UL DCI indication and a UL transmission time in the prior LTE technology, UE can expect to reserve the UL resource indicated in the scheduling information for the eNB from k subframes after receiving the UL resource scheduling signaling (signaling A) until the UE successfully completes UL transmission or other scheduling information failure events occur, and adds L1 layers of transmission opportunity indication signaling (signaling B), through which the eNB proposes preferred CCA listening occasions for the UE.

FIG. 9 is a diagram illustrating a UL subframe aggregation scheduling method using L1 layer transmission opportunity indication signaling (signaling B). since the signaling B carries less information, the UE can easily demodulate the signaling B, i.e., the processing delay can be greatly shortened. ideally, the UE can understand the information carried in the signaling B at the subframe where the signaling B is received. particularly, for the implicit rule, the eNB needs to schedule "pick up cars" of UEs at the (p-1) subframes just before the upper UE transmission end subframe (mth subframe) (i.e., the m-p +1 subframe), and p ≧ 1.

Then, as can be seen in fig. 9, there is a mathematical relationship constraint: m-p +1 is more than or equal to n + 1. The maximum duration of a single active transmission of the preamble UE is required to be m-n +1 ≧ p + 1. Because the information carried by the signaling B is very little, the delay from the receiving of the signaling B to the actual starting of the transmission of the UE can be shorter, for example, p ≧ 1. Therefore, the maximum duration of single effective transmission of the preamble UE is only required to be m-n +1 to p +1 to 2. That is, UL transmission of the preamble UE lasts at least 2 subframes, which can meet the minimum requirement of the multiple UE UL subframe aggregation scheduling required by the present case.

Obviously, compared with the method in fig. 3, the method for aggregating and transmitting uplink subframes of multiple UEs applied to the network side in fig. 8 puts lower requirements on the minimum transmission duration of the UE, and thus expands the application scenarios of the multiple UE uplink subframe aggregation transmission technology.

In addition, in , since an eNB long-term scheduling mechanism is defined, as long as the UE does not obtain a transmission opportunity or other scheduling information failure events do not occur, the UL scheduling signaling a indicating UL scheduling frequency domain resources is directly valid.

In a conventional LTE system, MCS level and UL frequency domain scheduling resources are simultaneously carried in the same DCIs, i.e. equivalently in signaling a, but due to the presence of a long-term scheduling mechanism, there may be a long time interval from the reception of signaling a by the UE to the actual acquisition of UL transmission opportunity by the UE, and MCS level is related to short-term channel quality, and too long an interval may result in MCS indication being no longer accurate or even invalid, so that it is indicated that UL MCS level may not be appropriate when signaling a is given, while the time interval from the reception of signaling B by the UE to the actual acquisition of UL transmission opportunity by the UE will be much shorter, so it is better to carry UL MCS level information in signaling B.

, if a UE A does not compete for the channel access opportunity in signaling B-based channel access attempts, and when the eNB reconfirms that the channel is occupied by any UEs in a UE group, the eNB will issue a command B to the UE A again.

On the contrary, in the multi-UE uplink subframe aggregation transmission method in fig. 3 and fig. 5, if the UE does not compete for the channel access opportunity in the current attempt, the eNB needs to repeatedly send a complete UL DCI scheduling signaling (while indicating the time-frequency resource location), so that a large signaling overhead needs to be spent.

In summary, the method in fig. 8 has lower signaling overhead when the UE fails to successfully contend for the channel access opportunity indicated by the L1 layer UL scheduling signaling, and is therefore preferred.

Based on the foregoing multi-UE uplink subframe aggregation transmission method implemented by the network side in fig. 8, an embodiment of the present invention further provides types of multi-UE uplink subframe aggregation transmission methods implemented by the terminal side, as shown in fig. 10, including the following steps:

step 100, any schedules the UE to receive the L1 layer transmission opportunity indication signaling sent by the base station.

Step 101, the arbitrary schedules the UE to attempt to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling under the trigger of the L1 layer transmission opportunity indication signaling.

Specifically, uplink data transmission among the scheduling UEs is not interfered with each other; the current channel operates on an unlicensed spectrum.

Specifically, any schedules a UE (hereinafter referred to as UE a), and when receiving the L1 layer transmission opportunity indication signaling, under the trigger of the L1 layer transmission opportunity indication signaling, tries to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling, and the UE a optionally occupies the current channel in of the following three execution manners.

is that when UE A receives the L1 layer transmission opportunity indication signaling, under the trigger of the L1 layer transmission opportunity indication signaling, the UE A directly occupies the current channel at the channel access subframe indicated by the L1 layer transmission opportunity indication signaling.

In the second way, when the UE a receives the L1 layer transmission opportunity indication signaling, under the triggering of the L1 layer transmission opportunity indication signaling, times of additional listening, i.e., periods of time, are started at the listening subframe indicated by the L1 layer transmission opportunity indication signaling, and it is determined that the current channel occupies the current channel when the current channel is idle through the additional listening.

The third mode is that when the arbitrary schedules the UE to receive the L1 layer transmission opportunity indication signaling, under the trigger of the L1 layer transmission opportunity indication signaling, the system listening process is restarted at the listening subframe indicated by the L1 layer transmission opportunity indication signaling, and the current channel is occupied when the current channel is determined to be idle by the system listening.

For the LBT mechanism adopting the second mode, the UE regards CCA interception opportunities indicated by the signaling B as additional interception opportunities, the UE intercepts x us. at the CCA interception time indicated by the signaling B, if the channel is idle, the UE immediately occupies the channel transmission, if the channel is busy, the UE abandons the transmission opportunity, if the attempt does not compete to the channel, the original LBT process cannot be influenced, for example, if a back-off counting operation exists in the LBT mechanism, the operation does not influence the back-off counting value;

for the LBT mechanism adopting the third manner, after receiving the signaling B, the UE restarts the LBT procedure and performs the first listening at the CCA listening occasion indicated by the signaling B.

Fig. 11 shows an existing LAA LBT mechanism, a UE is in idle (idle) state when UL transmission resources are not scheduled, if scheduled UL resources, transitions from idle state to initial CCA (initial CCA) state, starts trying to contend for channel access opportunities, if channel is continuously idle x us, the UE starts UL transmission, otherwise, the UE initializes backoff counters and enters extended CCA (ECCA) state, making more attempts, when UE is in ECCA state, it continues to listen to channel resources, every time channel is continuously idle y us, the UE decreases the backoff counter value , if channel is occupied by other devices, it continues to stay in ECCA state, and the backoff counter is suspended.

Then the LBT mechanism in the second way described above corresponds to the UE suspending the current CCA/ECCA procedure after receiving signaling B and adding 1 extra channel access attempt opportunity. If successful contention for the channel access opportunity occurs in this additional attempt, UL transmission is started. Otherwise, the previously suspended CCA/ECCA procedure is continued to be performed.

Then, the LBT mechanism in the third manner is adopted, which corresponds to that the UE directly returns to idle state after receiving the signaling B, and restarts the CCA/ECCA procedure.

It should be noted that there are multiple candidate LBT mechanisms, and the processing rules of the second approach (suspend the LBT procedure before, add additional access opportunities) and the third approach (restart the LBT procedure) mentioned in this case are generally applicable.

Based on the foregoing embodiment, as shown in fig. 12, a schematic structural diagram of an uplink subframe aggregation transmission apparatus applied to a network side according to an embodiment of the present invention includes a selecting unit 120 and a sending unit 121, where:

an th selecting unit 120, configured to determine that the current channel is occupied by a th UE served by the UE itself, and determine that the th UE selects, from other UEs not occupying the current channel served by the UE itself, at least UEs whose channel occupying time is less than the remaining available transmission time of the current channel as scheduling UEs when the occupying time of the current channel is less than the preset maximum transmission time;

a th sending unit 121, configured to send an uplink downlink control information, UL DCI, signaling to the scheduled UE, indicating that the scheduled UE attempts to occupy the current channel after the th UE releases the current channel.

Optionally, the -th selecting unit 120 selects scheduling UEs for which uplink data transmission is not interfered with each other.

Optionally, the sending unit 121 of the is configured to, when sending an UL DCI signaling to the scheduling UE to indicate the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel:

Optionally, the UL DCI signaling is sent to the scheduling UE to indicate that the scheduling UE attempts to occupy the current channel after the th UE releases the current channel, and the selecting unit 120 is further configured to:

For convenience of description, the above parts are separately described as modules (or units) according to functions, of course, the functions of the modules (or units) may be implemented in or more software or hardware when implementing the present invention.

In a specific implementation, the th uplink subframe aggregation transmission apparatus applied to the network side may be disposed in a base station.

As shown in fig. 13, a schematic structural diagram of an th uplink subframe aggregation transmission apparatus applied to a terminal side according to an embodiment of the present invention includes a th receiving unit 130 and a th processing unit 131, where:

, a receiving unit 130, configured to receive the uplink downlink control information UL DCI signaling sent by the apparatus according to the fifth aspect;

, a processing unit 131, configured to attempt to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling.

Optionally, when receiving the UL DCI signaling and attempting to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling, the -th processing unit 131 is specifically configured to:

In a specific implementation, the th uplink subframe aggregation transmission apparatus applied to the terminal side may be disposed in a user equipment.

As shown in fig. 14, a schematic structural diagram of an uplink subframe aggregation transmission system provided in the embodiment of the present invention includes: base station 141 and user equipment 142, wherein:

the base station 141 is configured to determine that a current channel is occupied by th UE served by itself, determine that th UE selects at least UEs not occupying the current channel from other UEs served by itself as a scheduling UE 142 when the occupied time of the current channel is less than a preset maximum transmission time, and send an uplink downlink control information UL DCI signaling to the scheduling UE 142 to instruct the scheduling UE 142 to attempt to occupy the current channel after the th UE releases the current channel.

The user equipment 142, configured to receive an uplink downlink control information UL DCI signaling sent by the base station 141; attempting to occupy a current channel indicated by the UL DCI signaling based on the UL DCI signaling.

As shown in fig. 15, a schematic structural diagram of a second uplink subframe aggregation transmission apparatus applied to a network side according to an embodiment of the present invention includes: a second sending unit 150, a second selecting unit 151, and a third sending unit 152, wherein:

a second sending unit 150, configured to send an UL resource scheduling signaling to all UEs served by the second sending unit, so as to indicate that, when the UE successfully contends for a channel access opportunity, the UL resource indicated by the UL resource scheduling signaling is used for UL transmission;

a second selecting unit 151, configured to determine that the current channel is occupied by th UE served by the UE, and determine that th UE selects, as scheduling UE, at least UEs whose channel occupancy time is less than the remaining available transmission time of the current channel from other UEs that are not occupied by the current channel and served by the UE when the occupancy time of the current channel is less than the preset maximum transmission time;

a third sending unit 152, configured to send L1 layer transmission opportunity indication signaling to the scheduled UE, indicating that the scheduled UE attempts to occupy the current channel after the th UE releases the current channel.

Optionally, uplink data transmission between the scheduling UEs selected by the second selecting unit 151 is not interfered with each other.

Optionally, it is determined that the current channel is occupied by the th UE served by the current channel, and the second selecting unit 151 is specifically configured to:

determining that the th UE does not successfully contend for the channel access opportunity based on the UL resource scheduling signaling, causing the third transmitting unit 152 to transmit a L1 layer transmission opportunity indication signaling to the th UE, indicating the th UE to continue contending for the channel access opportunity, determining that the th UE successfully contends for the channel access opportunity, and determining that the current channel is occupied by the th UE in the UE group when performing uplink transmission by using the UL resource indicated by the UL resource scheduling signaling.

Optionally, when transmitting an L1 layer transmission opportunity indication signaling to the scheduling UE to indicate the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, the third transmitting unit 152 is specifically configured to:

Optionally, an L1 layer transmission opportunity indication signaling is sent to the scheduling UE to indicate that the scheduling UE tries to occupy the current channel after the th UE releases the current channel, and the second selecting unit 151 is further configured to:

In a specific implementation, the second uplink subframe aggregation transmission apparatus applied to the network side may be disposed in a base station.

As shown in fig. 16, a schematic structural diagram of a second uplink subframe aggregation transmission apparatus applied to a terminal side according to an embodiment of the present invention includes: a second receiving unit 160 and a second processing unit 161, wherein:

a second receiving unit 160, configured to receive an L1 layer transmission opportunity indication signaling sent by the apparatus in the tenth aspect;

a second processing unit 161, configured to attempt to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling under the trigger of the L1 layer transmission opportunity indication signaling.

Optionally, under the trigger of the L1 layer transmission opportunity indication signaling, when attempting to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling, the second processing unit 161 is specifically configured to:

In a specific implementation, the second uplink subframe aggregation transmission apparatus applied to the terminal side may be disposed in a user equipment.

As shown in fig. 17, a schematic structural diagram of an uplink subframe aggregation transmission system provided in the embodiment of the present invention includes: a base station 171 and a user equipment 172, wherein:

the base station 171 is configured to send an UL resource scheduling signaling to all user equipments served by the base station 171 to indicate that UL resources indicated by the UL resource scheduling signaling are used for UL transmission when there is a successful contention for a channel access opportunity for the user equipments, determine that a current channel is already occupied by an th user equipment served by the base station, determine that a th UE selects at least UEs having channel occupancy times smaller than a remaining available transmission time of the current channel from other user equipments served by the base station as a scheduled user equipment 172 when the occupancy time of the current channel is smaller than a preset maximum transmission time, and send an L1 layer transmission opportunity indication signaling to the scheduled user equipment 172 to indicate that the scheduled user equipment 172 attempts to occupy the current channel after the th user equipment releases the current channel.

The user equipment 172, configured to receive L1 layer transmission opportunity indication signaling sent by the base station 171; under the trigger of the L1 layer transmission opportunity indication signaling, attempting to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling.

To sum up, in the embodiments of the present invention, the base station determines that the channel is already occupied by its own served th UE, and determines th UE as a scheduling UE when the occupied time of the current channel is less than the preset maximum transmission time, the base station sends L1 layer signaling (i.e. UL DCI signaling or L1 layer transmission opportunity indication signaling) to the scheduling UE to instruct the scheduling UE to attempt to occupy the current channel after th UE releases the current channel, and when the scheduling UE receives L1 layer signaling sent by the base station, the scheduling UE attempts to occupy the current channel based on the L1 layer signaling, so that the scheduling UE can fully utilize the remaining available transmission time of the current channel to occupy the current channel for UL data transmission, thereby improving the effective UL data transmission efficiency, and further adopting the hardware memory storage, or computer program storage, wherein the program storage, computer, or computer are used in the present invention, and the computer is not limited to the present invention.

It is to be understood that each flow and/or block in 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 which can 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 flow diagram 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.

Having described preferred embodiments of the invention, further alterations and modifications may be effected to these embodiments by those skilled in the art having the benefit of the basic inventive concepts .

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1, kinds of multiuser equipment UE uplink subframe aggregation transmission method, characterized by comprising:

2. The method of claim 1, wherein uplink data transmissions between the scheduled UEs do not interfere with each other.

3. The method of claim 1, wherein the th UE and the scheduling UE are geographically co-located or co-located.

4. The method of claim 1, wherein the operating spectrum of the current channel is an unlicensed spectrum.

5. The method of claim 1, wherein the base station sends UL DCI signaling to the scheduling UE instructing the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, specifically comprising:

and the base station sends ULDCI signaling to the scheduling UE at the first k-1 subframes of the transmission ending subframe of the UE on the current channel to indicate the scheduling UE to try to occupy the current channel after the UE releases the current channel, wherein the size of k is preset.

6. The method of any of claims 1-5, wherein a base station sends UL DCI signaling to the scheduled UE instructing the scheduled UE to occupy the current channel after attempting to occupy the current channel after the UE releases the current channel, further comprises:

after the base station occupies the current channel, the base station determines that all selected scheduling UE and UE continuously select at least UE with channel occupation time less than the residual available transmission time of the current channel from UE groups as new scheduling UE when the total occupation time of the current channel is not less than the preset maximum transmission time, wherein the UE and the scheduling UE have the same or similar geometric and geographic positions and are divided into UE groups by the base station, uplink data transmission among the new scheduling UE is not interfered with each other, the base station sends UL DCI signaling to the new scheduling UE to indicate the new scheduling UE to try to occupy the current channel after the scheduling UE selected last times releases the current channel, and the steps are repeated.

7, A method for uplink subframe aggregation transmission of multiple User Equipments (UEs), comprising:

any scheduling the UE to receive the uplink downlink control information (UL DCI) signaling of claim 1;

8. The method of claim 7, wherein uplink data transmissions between the scheduled UEs do not interfere with each other.

9. The method of claim 7, wherein the operating spectrum of the current channel is an unlicensed spectrum.

10. The method of claim 7, 8 or 9, wherein the any scheduling the UE to receive the UL DCI signaling attempting to occupy the current channel indicated by the UL DCI signaling based on the UL DCI signaling comprises:

11, method for transmitting uplink subframe aggregation of multiple User Equipments (UEs), comprising:

a base station sends Uplink (UL) resource scheduling signaling to all UE served by the base station to indicate that UL resources indicated by the UL resource scheduling signaling are used for UL transmission when the UE successfully competes for a channel access opportunity;

12. The method of claim 11, wherein uplink data transmissions between the scheduled UEs do not interfere with each other.

13. The method of claim 11, wherein the th UE and the scheduling UE are geographically co-located or co-located.

14. The method of claim 11, wherein the operating spectrum of the current channel is an unlicensed spectrum.

15. The method as claimed in claim 11, wherein the base station determining that the current channel is occupied by the th UE served by itself comprises:

16. The method of claim 11, wherein the base station sending L1 layer transmission opportunity indication signaling to the scheduling UE instructing the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, specifically comprising:

the base station sends the L1 layer transmission opportunity indication signaling to the scheduling UE at the first p-L subframes of the transmission ending subframe of the UE on the current channel, and indicates the scheduling UE to try to occupy the current channel after the UE releases the current channel, wherein the size of L is determined by the indication mode of the L1 layer transmission opportunity indication signaling.

17. The method of any of claims 11-16, wherein the base station sending L1 layer transmission opportunity indication signaling to the scheduling UE instructing the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, further comprises:

after the base station determines that the total occupied time of all the selected scheduling UEs and UE in the current channel is not less than the preset maximum transmission time, the base station continuously selects at least UEs with channel occupied time less than the remaining available transmission time of the current channel from UE groups as new scheduling UEs, wherein the UE and the scheduling UEs have the same or similar geometric geographic positions and are divided into UE groups by the base station, and uplink data transmission among the new scheduling UEs is not interfered with each other;

18, A method for uplink subframe aggregation transmission of multiple User Equipments (UEs), comprising:

any scheduler UE to receive the L1 layer transmission opportunity indication signaling of claim 11;

19. The method of claim 18, wherein uplink data transmissions between the scheduled UEs do not interfere with each other.

20. The method of claim 18, wherein the operating spectrum of the current channel is an unlicensed spectrum.

21. The method of claim 18, wherein the any scheduling the UE to attempt to occupy the current channel indicated by the L1 layer transmission opportunity indication signaling under the trigger of the L1 layer transmission opportunity indication signaling comprises:

22, kinds of multiuser equipment UE uplink subframe aggregation transmission apparatus, comprising:

23. The apparatus as claimed in claim 22, wherein the scheduling UEs selected by the selecting unit have non-interfering uplink data transmission.

24. The apparatus of claim 22, wherein the geometric geographic locations of the th UE and the scheduling UE are the same or similar.

25. The apparatus of claim 22, wherein the operating spectrum of the current channel is an unlicensed spectrum.

26. The apparatus of claim 22, wherein the transmission unit, when transmitting UL DCI signaling to the scheduling UE instructing the scheduling UE to attempt to occupy the current channel after the th UE releases the current channel, is specifically configured to:

transmitting UL DCI signaling to the scheduling UE at k-1 subframes before the transmission end subframe of the UE on a current channel, indicating that the scheduling UE attempts to occupy the current channel after the UE releases the current channel, wherein the size of k is preset.

27. The apparatus of any of claims 22-26, wherein the selection unit further is configured to send UL DCI signaling to the scheduling UE instructing the scheduling UE to, after attempting to occupy the current channel after the UE releases the current channel:

after the scheduling UE occupies the current channel, determining that the total occupied time of all selected scheduling UEs and th UEs is not less than the preset maximum transmission time length of the current channel, continuously selecting at least UEs with the channel occupied time less than the remaining available transmission time length of the current channel from UE groups as new scheduling UEs, wherein the th UEs and the scheduling UEs have the same or similar geometric and geographic positions and are divided into UE groups by a base station, and uplink data transmission among the new scheduling UEs is not interfered with each other;

28, kinds of multiuser equipment UE uplink subframe aggregation transmission apparatus, comprising:

a th receiving unit, for receiving the uplink downlink control information (UL DCI) signaling of claim 22;

29. The apparatus of claim 28, wherein the operating spectrum of the current channel is an unlicensed spectrum.

30. The apparatus of claim 28 or 29, wherein, upon receiving the UL DCI signaling, the th processing unit is specifically configured to, based on the UL DCI signaling attempting to occupy a current channel indicated by the UL DCI signaling:

31, kinds of base station equipment, comprising the multi-UE uplink subframe aggregation transmission apparatus according to any of claims 22 to 27.

32, user equipment, comprising the multi-UE uplink subframe aggregation transmission apparatus according to any of claims 28 to 30.

33, kinds of uplink subframe aggregation transmission system, characterized in that, it includes the base station device of claim 31 and the user equipment of claim 32.

34, kinds of multiuser equipment UE uplink subframe aggregation transmission apparatus, comprising:

a second sending unit, configured to send an uplink UL resource scheduling signaling to all UEs served by the second sending unit, so as to indicate that, when the UE successfully competes for a channel access opportunity, the UL resource indicated by the UL resource scheduling signaling is used for UL transmission;

35. The apparatus of claim 34, wherein uplink data transmission between the scheduled UEs selected by the second selecting unit does not interfere with each other.

36. The apparatus of claim 34, wherein the geometric geographic locations of the th UE and the scheduling UE are the same or similar.

37. The apparatus of claim 34, wherein the operating spectrum for the current channel is an unlicensed spectrum.

38. The apparatus of claim 34, wherein it is determined that the current channel is already occupied by an th UE served by the current channel, and the second selecting unit is specifically configured to:

39. The apparatus of claim 34, wherein the third transmitting unit, when transmitting L1 layer transmission opportunity indication signaling to the scheduling UE instructing the scheduling UE to attempt to occupy the current channel after the UE releases the current channel, is specifically configured to:

transmitting the L1 layer transmission opportunity indication signaling to the scheduling UE at the first p-L subframes of the transmission end subframe of the UE on the current channel, indicating that the scheduling UE attempts to occupy the current channel after the UE releases the current channel, wherein the size of L is determined by the indication manner of the L1 layer transmission opportunity indication signaling.

40. The apparatus of any of claims 34-39, wherein the second selecting unit is further configured to send L1 layer transmission opportunity indication signaling to the scheduled UE instructing the scheduled UE to occupy the current channel after the th UE attempts to release the current channel:

41, kinds of multiuser equipment UE uplink subframe aggregation transmission devices, characterized by comprising:

a second receiving unit, configured to receive the L1 layer transmission opportunity indication signaling according to claim 34;

42. The apparatus of claim 41, wherein the operating spectrum for the current channel is an unlicensed spectrum.

43. The apparatus of claim 41, wherein, in attempting to camp on a current channel indicated by the L1 layer transmission opportunity indication signaling under triggering of the L1 layer transmission opportunity indication signaling, the second processing unit is specifically configured to:

44, kinds of base station equipment, characterized in that, it includes the multi-UE uplink subframe aggregation transmission device of any of claims 34 to 40.

45. user equipment, comprising the multi-UE uplink subframe aggregation transmission apparatus according to any of claims 41 to 43.

46, kinds of ascending sub-frame aggregation transmission system, characterized in that, it includes the base station device of claim 44 and the user equipment of claim 45.