CN107241810B - Scheduling method and sending method of uplink data, base station and user equipment - Google Patents

Scheduling method and sending method of uplink data, base station and user equipment Download PDF

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Publication number
CN107241810B
CN107241810B CN201610186535.1A CN201610186535A CN107241810B CN 107241810 B CN107241810 B CN 107241810B CN 201610186535 A CN201610186535 A CN 201610186535A CN 107241810 B CN107241810 B CN 107241810B
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uplink
subframe
control information
scheduling
downlink control
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CN107241810A (en
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周欢
孙鹏
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Beijing Xinwei Telecom Technology Inc
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Beijing Xinwei Telecom Technology Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a scheduling method and a sending method of uplink data, a base station and user equipment. The scheduling method comprises the following steps: sending a scheduling signaling in downlink data, wherein the scheduling signaling triggers an uplink subframe of a first carrier to be sent according to set parameters, and the set parameters comprise an initial time and a duration; sending public downlink control information to inform the starting time and the duration; a downlink data channel occupies a channel until an uplink subframe is received through the channel; wherein the first carrier is deployed in an unlicensed spectrum. In the scheme, the channel for sending the downlink data is maintained, the uplink data is directly sent through the channel for sending the downlink data when the uplink data is sent, an LBT mechanism is not adopted in the transmission process of the uplink data, the transmission of the uplink data is carried out after the transmission of the downlink data is finished within a set time period, the transmission of the uplink data can be realized without an authorization process by changing the time sequence relation between the original uplink scheduling and the uplink data, and the performance of an uplink system is improved.

Description

Scheduling method and sending method of uplink data, base station and user equipment
Technical Field
The present invention relates to the field of communications, and in particular, to a scheduling method, a sending method, a base station, and a user equipment for uplink data.
Background
In a conventional 3GPP (3rd Generation Partner Project) LTE (long term Evolution) system, data transmission can only occur on a licensed spectrum (licensed spectrum), however, with the rapid increase of traffic, especially in some urban areas, the licensed spectrum may have difficulty meeting the traffic demand. There is a need for Non-standalone (Non-persistent) deployments of LTE over unlicensed spectrum, where communication over unlicensed spectrum is to be associated with a serving cell over licensed spectrum. An intuitive method is to reuse the concept of Carrier Aggregation (CA) in the existing system as much as possible, that is, a serving cell deployed on a licensed spectrum is used as a PCC (Primary Component Carrier) and a serving cell deployed on an unlicensed spectrum is used as an SCC (Secondary Component Carrier).
The 3GPP has already completed LAA (Licensed Assisted Access) downlink transmission technology, that is, a downlink mobile communication service is carried on an unlicensed spectrum, such as a frequency band of 5 GHz. In the unlicensed spectrum, WiFi, bluetooth, radar, medical and other systems are mainly used at present. Due to the diversity and complexity of systems over unlicensed spectrum, the problem of coexistence needs to be solved, and one basic principle is that different systems can fairly occupy unlicensed frequency bands. Because the current LAA base station does not have the WiFi function, that is, the signaling for realizing coexistence between WiFi in the traditional WiFi system cannot be directly applied to the LAA system. Therefore, there may be a problem of transmission collision. The coexistence between the LAA system and the LAA system also needs to be solved. The coexistence issues include coexistence between LAA and LAA, as well as coexistence of LAA with other unlicensed systems such as WiFi.
A CCA (Clear Channel Access) technology is introduced into the downlink Access in the LAA, and the problem of transmission collision between LAA systems on an unlicensed spectrum and between the LAA and a WiFi system can be avoided through an LBT (Listen Before Talk) mechanism, i.e., a method of monitoring first and then transmitting.
Limited by the maximum continuous transmission duration, a Downlink transmission may have a case where an ending subframe (subframe n) is a partial subframe, and at this time, an eNB (Evolved NodeB, Evolved base station, i.e., LTE base station) transmits common DCI (Downlink Control Information) in both an n-1 subframe and an n subframe, carries the Information by using DCI format 1C, and notifies the UE of ending the number of symbols of the subframe n by scrambling using CC-RNTI.
However, in the case that the ending subframe is a partial subframe, the LAA uplink access process cannot support uplink access and cannot transmit uplink data in an unlicensed system.
Disclosure of Invention
The invention provides a scheduling method, a sending method, a base station and user equipment of uplink data, and aims to solve the problems that an unlicensed system cannot support uplink access and cannot transmit the uplink data in an LAA uplink access process.
In order to realize the design, the invention adopts the following technical scheme:
a first aspect employs a method for scheduling uplink data, including:
sending a scheduling signaling in downlink data, wherein the scheduling signaling triggers an uplink subframe of a first carrier to be sent according to set parameters, and the set parameters comprise an initial time and a duration;
sending public downlink control information to inform the starting time and the duration;
occupying a channel by a downlink data channel until receiving an uplink subframe through the channel;
wherein the first carrier is deployed in an unlicensed spectrum.
A second aspect adopts a method for transmitting uplink data, including:
receiving a scheduling instruction and common downlink control information, wherein the scheduling instruction is triggered to be sent in an uplink subframe of a first carrier according to set parameters, and the set parameters comprise an initial time and a duration;
sending an uplink subframe according to the duration time by receiving a scheduling instruction and a channel of the public downlink control information at the initial time;
wherein the first carrier is deployed in an unlicensed spectrum.
A third aspect employs a base station, comprising:
a scheduling signaling sending unit, configured to send a scheduling signaling in downlink data, where the scheduling signaling triggers sending according to a set parameter in an uplink subframe of a first carrier, and the set parameter includes an initial time and a duration;
a control information sending unit, configured to send common downlink control information to notify the starting time and the duration;
a channel occupying unit, configured to occupy a channel by a downlink data channel until an uplink subframe is received through the channel;
wherein the first carrier is deployed in an unlicensed spectrum.
A fourth aspect employs a user equipment comprising:
the scheduling receiving unit is used for receiving a scheduling instruction and public downlink control information, the scheduling signaling is triggered to be sent in an uplink subframe of a first carrier according to set parameters, and the set parameters comprise starting time and duration;
a data transmitting unit, configured to transmit an uplink subframe according to a duration through a channel receiving a scheduling instruction and common downlink control information at the starting time;
wherein the first carrier is deployed in an unlicensed spectrum.
The invention has the beneficial effects that: the method comprises the steps of sending a scheduling signaling and public downlink control information when downlink data are sent, setting relevant parameters for sending the uplink data, maintaining a channel for sending the downlink data, directly sending the uplink data through the channel for sending the downlink data when the uplink data are sent, wherein an LBT mechanism is not adopted in the transmission process of the uplink data, the transmission of the uplink data is carried out after the transmission of the downlink data is finished and a set time period passes, and the transmission of the uplink data can be realized without an authorization process by changing the time sequence relation between the original uplink scheduling and the uplink data, so that the performance of an uplink system is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic diagram of an alternative wireless communication system in accordance with various embodiments of the present invention.
Fig. 2 is a flowchart of a method of a first embodiment of a scheduling method of uplink data according to an embodiment of the present invention.
Fig. 3A is a flowchart of a method for scheduling uplink data according to a second embodiment of the present invention.
Fig. 3B is a schematic data transmission diagram of a scheduling method of uplink data according to a second embodiment of the present invention.
Fig. 4 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method for scheduling and transmitting uplink data according to an embodiment of the present invention.
Fig. 6 is a block diagram of an embodiment of a base station according to an embodiment of the present invention.
Fig. 7 is a block diagram illustrating an example of a ue according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Such as wired and wireless communication systems and satellite-based communication systems, are used for transmissions that are configured to transmit data via frames or packets.
Such communication systems may use different air interfaces and/or physical layers. For example, the air interface used by the communication system includes, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)), global system for mobile communications (GSM), and the like. By way of non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.
Referring to fig. 1, a CDMA wireless communication system may include a plurality of mobile terminals 100, a plurality of Base Stations (BSs) 270, Base Station Controllers (BSCs) 275, and a Mobile Switching Center (MSC) 280. The MSC280 is configured to interface with a Public Switched Telephone Network (PSTN) 290. The MSC280 is also configured to interface with a BSC275, which may be coupled to the base station 270 via a backhaul. The backhaul may be constructed according to any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, frame Relay, HDSL, ADSL, or xDSL. It will be understood that a system as shown in fig. 1 may include multiple BSCs 275.
Each BS270 may serve one or more sectors (or regions), each sector covered by a multi-directional antenna or an antenna pointing in a particular direction being radially distant from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS270 may be configured to support multiple frequency allocations, with each frequency allocation having a particular frequency spectrum (e.g., 1.25MHz,5MHz, etc.).
The intersection of partitions with frequency allocations may be referred to as a CDMA channel. The BS270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" may be used to generically refer to a single BSC275 and at least one BS 270. The base stations may also be referred to as "cells". Alternatively, each partition of a particular BS270 may be referred to as a plurality of cell sites.
As shown in fig. 1, a Broadcast Transmitter (BT)295 transmits a broadcast signal to the mobile terminal 100 operating within the system. In fig. 1, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 assists in locating at least one of the plurality of mobile terminals 100.
In fig. 1, a plurality of satellites 300 are depicted, but it is understood that useful positioning information may be obtained with any number of satellites. Other techniques that can track the location of the mobile terminal may be used instead of or in addition to GPS tracking techniques. In addition, at least one GPS satellite 300 may selectively or additionally process satellite DMB transmission.
As a typical operation of the wireless communication system, the BS270 receives reverse link signals from various mobile terminals 100. The mobile terminal 100 is generally engaged in conversations, messaging, and other types of communications. Each reverse link signal received by a particular BS270 is processed within the particular BS 270. The obtained data is forwarded to the associated BSC 275. The BSC275 provides call resource allocation and mobility management functions including coordination of soft handoff procedures between the BSs 270. The BSCs 275 also route the received data to the MSC280, which provides additional routing services for interfacing with the PSTN 290. Similarly, the PSTN 290 interfaces with the MSC280, the MSC280 interfaces with the BSCs 275, and the BSCs 275 accordingly control the BS270 to transmit forward link signals to the mobile terminal 100.
Based on the basic principle of the communication system, the embodiments of the uplink data scheduling method of the present invention are proposed in the communication process of the eNB.
Please refer to fig. 2, which is a flowchart illustrating a method for scheduling uplink data according to a first embodiment of the present invention. As shown in the figure, the scheduling method includes:
step S101: scheduling signaling is sent in the downlink data.
When the scheme is implemented in the using process of the communication system, the eNB performs downlink access according to Cat 4LBT, and the scheduling described in this embodiment is implemented after successful access. Cat 4LBT is a working mode of LBT, and in this mode, an LBT mechanism is used for UL (Uplink) designed in the present solution, and Uplink transmission is performed after a fixed time interval elapses after downlink transmission is finished.
The scheduling method in the scheme is mainly directed at a special carrier wave, the first carrier wave is defined in the scheme and is deployed in an unlicensed spectrum, and the first carrier wave is in fair competition with other communication protocols in the unlicensed spectrum and shares a frequency band.
And the scheduling signaling is triggered to be sent in an uplink subframe of the first carrier according to set parameters, wherein the set parameters comprise an initial time and a duration. It should be noted that the scheduling signaling cannot independently complete the scheduling of the uplink data, and only can activate the transmission of the uplink data, and how to implement the specific transmission of the uplink data is another instruction control.
Step S102: and sending public downlink control information to inform the starting time and the duration.
Due to the limitation of the operation mode of the unlicensed spectrum, uplink data cannot be realized in an unlicensed system. In the scheme, the channel allocation of the uplink data is realized in a top-down allocation mode, and for a receiver of the uplink data, the receiver only needs to inform a sender of sending the data with the confirmed duration through the confirmed channel at the determined time, so that the interception and authorization processes before the transmission of the uplink data are avoided.
It should be further emphasized that, step S101 and step S102 have no chronological order, and may send the scheduling signaling first, or send the common downlink control information first, or send the scheduling signaling and the common downlink control information in the same subframe, and for the sender of the uplink data, two conditions must be simultaneously met to send the uplink data, so that the order of the two conditions does not affect the transmission of the uplink data.
Step S103: the channel is occupied by a downlink data channel until an uplink subframe is received over the channel.
In the process of waiting for uplink data uploading, the original channel cannot be released and needs to be reserved for the uplink data, a sender waiting for the uplink data sends the uplink data at the initial time specified in the common downlink control information, and at least maintains the specified duration, namely the number of uplink subframes.
In summary, in the uplink data scheduling method in this embodiment, the scheduling signaling and the common downlink control information are sent when the downlink data is sent, the relevant parameter for sending the uplink data is set, and meanwhile, the channel for sending the downlink data is maintained, when the uplink data is sent, the uplink data is sent directly through the channel for sending the downlink data, the transmission process of the uplink data does not use an LBT mechanism, the uplink data is transmitted after the downlink data is transmitted for a set time period, that is, the uplink data is transmitted, by changing the timing relationship between the original uplink scheduling and the uplink data, the transmission of the uplink data can be achieved without an authorization process, and the performance of the uplink system is improved.
Please refer to fig. 3A, which is a flowchart illustrating a method for scheduling uplink data according to a second embodiment of the present invention. As shown in the figure, the scheduling method includes:
step S201: scheduling signaling is sent in the downlink data.
In the process of data transmission, different data transmissions have different protocol requirements, and specifically, when the scheme is implemented, the uplink subframe is an uplink channel or an uplink signal.
When the uplink subframe is an uplink channel, the scheduling signaling is downlink control information of uplink scheduling;
specifically, when a sender needing uplink data sends an uplink Channel in an LAA cell, uplink scheduling (UL grant) DCI scheduling information is sent in the LAA cell and carried on a PDCCH (Physical Downlink Control Channel) or ePDCCH (enhanced Physical Downlink Control Channel).
And when the uplink subframe is an uplink signal, the scheduling signaling is downlink control information of uplink scheduling or downlink control information of downlink scheduling.
When a sender needing uplink data sends an uplink Signal, such as an SRS (sounding reference Signal), on an LAA cell, because an SRS trigger signaling may be carried in an uplink or downlink scheduling DCI, a corresponding scheduling signaling may be downlink control information of uplink scheduling or downlink control information of downlink scheduling.
Step S202: sending public downlink control information at an ending subframe of downlink data, informing that the starting time of an uplink subframe is a subframe behind the ending subframe, and the duration is k subframes, wherein k belongs to [1, log ]2R]。
There are many ways to realize the starting time and duration, and overall, the public downlink control information records the information of the setting parameter through a binary number, and the bit number of the binary number is determined by the maximum allowable duration number of the uplink subframe.
E.g. common downlink control information by log2And the R bit informs the starting time and the duration of the uplink subframe, the public downlink control information is sent in the ending subframe of the downlink data, the starting time of the uplink subframe is informed to be the next subframe of the ending subframe, and the duration is informed to be k subframes. For example, when R is 4, the specific arrangement is as shown in table 1. As can be seen from table 1, in this manner, the starting time is static, and only the duration of each transmission of uplink data is changed, which is specifically determined by the size of the uplink data, the traffic busy level of the unlicensed spectrum, and the like.
Figure BDA0000952549460000071
Table 1 configuration table of setting parameters when R is 4
For another example, when R is 8, the specific arrangement is as shown in table 2.
Figure BDA0000952549460000081
Table 2 configuration table of setting parameters when R is 8
Also for example, common downlink control information passes through 2log2And the R bit informs the starting time and the duration of the uplink subframe, wherein R is the maximum allowable duration number of the uplink subframe. The specific configuration is shown in table 3.
The length of the common downlink control information is 2log2In the case of R bits, the transmission method of the common downlink control information also changes correspondingly, specifically: sending the same public downlink control information in a penultimate subframe and a penultimate subframe of downlink data of the public downlink control information, informing that the starting time of an uplink subframe is an ending subframe of the downlink data, the duration is k subframes, and k belongs to [1, 2log ]2R]. In this case, it is obvious that the starting time of the uplink subframe is dynamically changed, specifically, in two cases, see table 3.
Figure BDA0000952549460000091
Table 3 configuration table of another setting parameter when R is 8
Step S203: the channel is occupied by a downlink data channel until an uplink subframe is received over the channel.
The receiving process of the uplink subframe is the same as that of other cases, and is not further described herein, but the main difference is that a channel is reserved for receiving the uplink subframe.
In essence, there is also a more static implementation of the solution, for example:
and sending a scheduling signaling in the ending subframe of the downlink data.
All the setting processes are staticized as much as possible, and the sending time of the scheduling signaling is confirmed first.
On this basis, further defaults can be made to statically implemented parameters. For example, the starting time is directly set as the mth subframe after the ending subframe, the duration is k subframes, wherein m is a preset constant; k is an element of [1,4 ].
The specific data transmission process in the scheme is explained by an example based on the static setting mode. Please refer to fig. 3B.
In fig. 3B, the eNB needs to transmit an Uplink shared channel (PUSCH) on the LAA cell, and transmit a scheduling signaling in the end subframe of the downlink data, that is, n in fig. 3B, and the next three subframes (n +1, n +2, and n +3) are still downlink subframes, where one subframe transmits common downlink control information, and n +2 in fig. 3B. According to the statically set parameters, the uplink data is started to be transmitted in the fourth subframe after the subframe is ended, that is, n +4 in fig. 3B starts to be transmitted in the uplink PUSCH channel, and the length of the specific uplink subframe may be set according to actual needs.
In summary, in the uplink data scheduling method in this embodiment, the scheduling signaling and the common downlink control information are sent when the downlink data is sent, the relevant parameter for sending the uplink data is set, and meanwhile, the channel for sending the downlink data is maintained, when the uplink data is sent, the uplink data is sent directly through the channel for sending the downlink data, the transmission process of the uplink data does not use an LBT mechanism, the uplink data is transmitted after the downlink data is transmitted for a set time period, that is, the uplink data is transmitted, by changing the timing relationship between the original uplink scheduling and the uplink data, the transmission of the uplink data can be achieved without an authorization process, and the performance of the uplink system is improved. Meanwhile, the length of each uplink subframe and the setting of the starting time further meet various different requirements in data transmission, and the utilization rate of channel resources is improved.
Referring to fig. 4, it is a flowchart of a method for sending uplink data according to an embodiment of the present invention, as shown in the figure, the sending method includes:
step S301: and receiving a scheduling instruction and common downlink control information.
The scheduling signaling is triggered to be sent in an uplink subframe of a first carrier according to set parameters, wherein the set parameters comprise an initial time and a duration; wherein the first carrier is deployed in an unlicensed spectrum.
The receiving and decoding of scheduling command and common downlink control information belongs to a common technical scheme in the communication field, and the key point is to transmit uplink data on the basis of an original maintained channel according to a received set parameter.
Step S302: and transmitting the uplink subframe according to the duration time by receiving a scheduling instruction and a channel of the public downlink control information at the starting time.
In summary, in the uplink data transmission method in this embodiment, according to the received scheduling signaling and the common downlink control information, by maintaining the channel for transmitting the downlink data, when the uplink data is transmitted, the uplink data is directly transmitted through the channel for transmitting the downlink data, an LBT mechanism is not used in the transmission process of the uplink data, and after the transmission of the downlink data is finished, a set time period passes, that is, the transmission of the uplink data is performed.
Please refer to fig. 5, which is a flowchart illustrating a method for scheduling and transmitting uplink data according to an embodiment of the present invention. As shown in the figure, the scheduling transmission method includes:
step S301: scheduling signaling is sent in the downlink data.
The scheduling signaling is triggered to be sent in an uplink subframe of a first carrier according to set parameters, wherein the set parameters comprise an initial time and a duration;
step S302: and sending the public downlink control information to inform the starting time and the duration.
Step S303: and receiving a scheduling instruction and common downlink control information.
Step S304: the channel is occupied by the downlink data channel until the uplink subframe is received through the channel.
Step S305: and transmitting the uplink subframe according to the duration time through a channel for receiving the scheduling command and the common downlink control information at the initial moment.
The embodiment of the method is a comprehensive implementation of the foregoing embodiment, wherein the detailed part of the content is implemented correspondingly to the foregoing content, and the present embodiment illustrates a complete architecture for data transmission in a communication network as a whole.
The following is an embodiment of a base station in the present invention, which is implemented based on an embodiment of a scheduling method for uplink data, and please refer to the embodiment of the scheduling method for uplink data, which is not described in the embodiment of the base station.
Please refer to fig. 6, which is a block diagram illustrating an exemplary base station according to an embodiment of the present invention. As shown, the base station includes:
a scheduling signaling sending unit 10, configured to send a scheduling signaling in downlink data, where the scheduling signaling triggers sending according to a set parameter in an uplink subframe of a first carrier, where the set parameter includes an initial time and a duration;
a control information sending unit 20, configured to send common downlink control information to notify the starting time and the duration;
a channel occupying unit 30, configured to occupy a channel by a downlink data channel until receiving an uplink subframe through the channel;
wherein the first carrier is deployed in an unlicensed spectrum.
The uplink subframe is an uplink channel or an uplink signal;
when the uplink subframe is an uplink channel, the scheduling signaling is downlink control information of uplink scheduling;
and when the uplink subframe is an uplink signal, the scheduling signaling is downlink control information of uplink scheduling or downlink control information of downlink scheduling.
In a preferred embodiment, the common downlink control information passes log2R bit informs the starting time and duration of the uplink subframe, wherein R is the maximum allowable number of the uplink subframes;
the control information sending unit 20 is specifically configured to:
sending public downlink control information at an ending subframe of downlink data, informing that the starting time of an uplink subframe is a subframe behind the ending subframe, the duration is k subframes, and k belongs to [1, log ∈2R]。
In another preferred embodiment, the common downlink control information passes 2log2R bit informs the starting time and duration of the uplink subframe, wherein R is the maximum allowable number of the uplink subframes;
the control information sending unit 20 is specifically configured to:
sending the same public downlink control information at the last but one subframe and the last but one subframe of the downlink data, informing that the starting time of the uplink subframe is the ending subframe of the downlink data, the duration is k subframes, and k belongs to [1, 2log ]2R]。
In another preferred embodiment, the scheduling signaling sending unit 10 is specifically configured to:
sending a scheduling signaling in a finishing subframe of downlink data;
the control information sending unit 20 specifically includes:
sending public downlink control information, and informing that the starting time is the mth subframe after the ending subframe, and the duration is k subframes; wherein m is a preset constant; k is an element of [1,4 ].
To sum up, the above units work cooperatively, to sum up, in the scheduling method for uplink data in this embodiment, when downlink data is sent, a scheduling signaling and common downlink control information are sent, related parameters for sending uplink data are set, and meanwhile, a channel for sending downlink data is maintained, when uplink data is sent, uplink data is sent directly through the channel for sending downlink data, an LBT mechanism is not used in a transmission process of uplink data, transmission of uplink data is performed after a set time period elapses after transmission of downlink data is completed, and by changing a timing relationship between original uplink scheduling and uplink data, transmission of uplink data can be achieved without an authorization process, so that performance of an uplink system is improved. Meanwhile, the length of each uplink subframe and the setting of the starting time further meet various different requirements in data transmission, and the utilization rate of channel resources is improved.
Please refer to fig. 7, which is a block diagram illustrating an example of a ue according to an embodiment of the present invention. As shown, the user equipment includes:
a scheduling receiving unit 40, configured to receive a scheduling instruction and common downlink control information, where the scheduling instruction is triggered to be sent in an uplink subframe of a first carrier according to a set parameter, where the set parameter includes a start time and a duration;
a data transmitting unit 50, configured to transmit an uplink subframe according to a duration through a channel receiving a scheduling instruction and common downlink control information at the starting time;
wherein the first carrier is deployed in an unlicensed spectrum.
The mobile terminal is a user equipment.
In summary, the system of each unit described above works, according to the received scheduling signaling and the common downlink control information, by maintaining the channel for sending the downlink data, and sending the uplink data directly through the channel for sending the downlink data when sending the uplink data, the transmission process of the uplink data does not use the LBT mechanism, and after the transmission of the downlink data is finished, a set time period passes, that is, the transmission of the uplink data is performed, and by changing the time sequence relationship between the original uplink scheduling and the uplink data, the transmission of the uplink data can be achieved without the authorization process, thereby improving the performance of the uplink system.
Finally, the present invention further provides a system for scheduling and transmitting uplink data, which includes the foregoing base station and the foregoing user equipment.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (5)

1. A method for scheduling uplink data, comprising:
sending a scheduling signaling in downlink data, wherein the scheduling signaling triggers an uplink subframe of a first carrier to be sent according to set parameters, and the set parameters comprise an initial time and a duration;
sending the public downlink control information to inform the starting time and the duration time, which specifically comprises the following steps: sending public downlink control information at an ending subframe of downlink data, informing that the starting time of an uplink subframe is a subframe behind the ending subframe, the duration is k subframes, and k belongs to [1, log ∈2R]Wherein the length of the common downlink control information is log2R bits, wherein R is the maximum allowable continuous number of uplink subframes; or,
sending the same public downlink control information at the last but one subframe and the last but one subframe of the downlink data, informing that the starting time of the uplink subframe is the ending subframe of the downlink data, the duration is k subframes, and k belongs to [1, 2log ]2R]Wherein the length of the common downlink control information is 2log2R bits, wherein R is the maximum allowable continuous number of uplink subframes; or,
the scheduling signaling is sent in a finishing subframe of the downlink data, public downlink control information is sent to inform that the starting time is the mth subframe after the finishing subframe, the duration is k subframes, wherein m is a preset constant, and k belongs to [1,4 ];
occupying a channel by a downlink data channel until receiving an uplink subframe through the channel;
wherein the first carrier is deployed in an unlicensed spectrum.
2. The scheduling method according to claim 1, wherein the uplink subframe is an uplink channel or an uplink signal;
when the uplink subframe is an uplink channel, the scheduling signaling is downlink control information of uplink scheduling;
and when the uplink subframe is an uplink signal, the scheduling signaling is downlink control information of uplink scheduling or downlink control information of downlink scheduling.
3. A method for transmitting uplink data, comprising:
receiving a scheduling instruction and common downlink control information, wherein the scheduling instruction is triggered to be sent in an uplink subframe of a first carrier according to set parameters, and the set parameters comprise an initial time and a duration;
sending an uplink subframe according to the duration time by receiving a scheduling instruction and a channel of the public downlink control information at the initial time;
wherein the first carrier is deployed in an unlicensed spectrum.
4. A base station, comprising:
a scheduling signaling sending unit, configured to send a scheduling signaling in downlink data, where the scheduling signaling triggers sending according to a set parameter in an uplink subframe of a first carrier, and the set parameter includes an initial time and a duration;
a control information sending unit, configured to send common downlink control information to notify the starting time and the duration, and specifically configured to: sending public downlink control information at an ending subframe of downlink data, informing that the starting time of an uplink subframe is a subframe behind the ending subframe, the duration is k subframes, and k belongs to [1, log ∈2R]Wherein the length of the common downlink control information is log2R bits, wherein R is the maximum allowable continuous number of uplink subframes; or,
sending the same public downlink control information at the last but one subframe and the last but one subframe of the downlink data, informing that the starting time of the uplink subframe is the ending subframe of the downlink data, the duration is k subframes, and k belongs to [1, 2log ]2R]Wherein the length of the common downlink control information is 2log2R bits, wherein R is the maximum allowable continuous number of uplink subframes; or,
the scheduling signaling is sent in a finishing subframe of the downlink data, public downlink control information is sent to inform that the starting time is the mth subframe after the finishing subframe, the duration is k subframes, wherein m is a preset constant, and k belongs to [1,4 ];
a channel occupying unit, configured to occupy a channel by a downlink data channel until an uplink subframe is received through the channel;
wherein the first carrier is deployed in an unlicensed spectrum.
5. A user device, comprising:
the scheduling receiving unit is used for receiving a scheduling instruction and public downlink control information, the scheduling signaling is triggered to be sent in an uplink subframe of a first carrier according to set parameters, and the set parameters comprise starting time and duration;
a data transmitting unit, configured to transmit an uplink subframe according to a duration through a channel receiving a scheduling instruction and common downlink control information at the starting time;
wherein the first carrier is deployed in an unlicensed spectrum.
CN201610186535.1A 2016-03-29 2016-03-29 Scheduling method and sending method of uplink data, base station and user equipment Expired - Fee Related CN107241810B (en)

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