CN108668365B - Data transmission method, base station and user equipment - Google Patents

Data transmission method, base station and user equipment Download PDF

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CN108668365B
CN108668365B CN201710208639.2A CN201710208639A CN108668365B CN 108668365 B CN108668365 B CN 108668365B CN 201710208639 A CN201710208639 A CN 201710208639A CN 108668365 B CN108668365 B CN 108668365B
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base station
scheduling unit
data
user equipment
target scheduling
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CN108668365A (en
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秦一平
曾兴
李言召
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a data transmission method, a base station and user equipment. The method provided by the embodiment of the invention comprises the following steps: the base station determines the quality of an uplink channel of user equipment; the base station allocates a target scheduling unit to the user equipment according to the uplink channel quality, wherein the target scheduling unit appears periodically in a time domain; and the base station sends the allocation information of the target scheduling unit to the user equipment.

Description

Data transmission method, base station and user equipment
Technical Field
The present application relates to the field of communications technologies, and in particular, to a data transmission method, a base station, and a user equipment.
Background
Ultra Reliable Low Latency Communication (URLLC) is mainly used for industrial control, telemedicine, assisted driving, and automatic driving, and these services often require Ultra high reliability and Ultra Low Latency, for example, 10 in 1ms-5Block error rate of. A Long Term Evolution (LTE) uplink User first sends a Service Request (SR) to an Evolved Node B (eNB) (hereinafter referred to as a base station) by a User Equipment (User Equipment, UE), then the base station issues a grant (grant) to the UE according to the SR, the UE sends data to the base station on a certain time-frequency resource according to the grant, after receiving the data, the base station decodes the data to obtain a decoding result, and feeds the decoding result back to the UE, and the UE determines a scheduling retransmission strategy according to the decoding result. The Time delay of the user plane involved in the Transmission process of the UE and the base station includes a processing Time delay of the base station, a duration of a Transmission Time Interval (TTI), a processing Time delay of the UE, and a retransmission Time delay of a Hybrid Automatic Repeat reQuest (HARQ). Obviously, the transmission process takes a long time, and cannot meet the delay requirement of URLLC. Thus, there is a current need to redesign the UE andand the transmission mechanism of the base station is used for meeting the time delay requirement of the URLLC.
Disclosure of Invention
The embodiment of the invention provides a data transmission method, a base station and user equipment, which can improve the utilization rate of time-frequency resources, reduce resource waste and improve the frequency spectrum efficiency.
In view of this, a first aspect of an embodiment of the present invention provides a data transmission method, which may include: the base station determines the uplink channel quality of the user equipment, wherein the uplink channel quality may be the channel quality of a carrier unit, and the uplink channel quality is determined by at least one of the following parameters: signal to interference plus noise ratio and signal to interference plus noise ratio fluctuation variance. After the base station determines the uplink channel quality of the user equipment, the base station allocates a target scheduling unit to the user equipment according to the uplink channel quality, the target scheduling unit presents certain periodicity in a time domain, the target scheduling unit is one type of at least two scheduling units of different types preset by the base station, and the scheduling units of different types have different time-frequency resources. And then the base station generates the distribution information of the target scheduling unit and sends the distribution information of the target scheduling unit to the user equipment. Therefore, the base station can divide the scheduling units with different resource granularities for the user equipment according to the uplink channel quality of the user equipment, and compared with the prior art that the scheduling units with the same resource granularity can only be divided for the user equipment, the technical scheme of the application can allocate the most appropriate scheduling units for the user equipment, so that the time-frequency resource utilization rate is improved, the resource waste is reduced, and the frequency spectrum efficiency is improved.
In some possible implementation manners, after the base station sends the allocation information of the target scheduling unit to the user equipment, the user equipment sends data on the target scheduling unit according to the allocation information of the target scheduling unit, and if the base station receives the data sent by the user equipment on the target scheduling unit, the base station demodulates and decodes the data to obtain a decoding result. And finally, the base station determines a scheduling retransmission strategy according to the decoding result, and determines whether to send scheduling retransmission indication information to the user equipment or not through the scheduling retransmission strategy. Therefore, the base station can flexibly select scheduling retransmission according to the decoding result, and the technical scheme of the application is perfected.
In some possible implementation manners, the base station allocates SRS resource positions to the user equipment, for example, the base station may allocate the same SRS resource positions to multiple user equipments, and the base station may also allocate different SRS resource positions to multiple user equipments; the base station sends the allocation information of the resource position of the SRS to the user equipment; and when the user equipment periodically sends the SRS to the base station according to the allocation information of the SRS resource position, the base station determines the uplink channel quality of the user equipment according to the received SRS. Therefore, the implementation mode provides a method for determining the quality of the uplink channel, so that the technical scheme of the application is perfected.
In other possible implementation manners, after the base station allocates the target scheduling unit to the user equipment according to the uplink channel quality, the base station may further negotiate a scheduling parameter of the DMRS with the user equipment, where the scheduling parameter includes at least one of a root sequence, a cyclic shift, a transport block set, and a modulation manner, that is, the base station may determine the scheduling parameter of the DMRS according to the allocation information of the target scheduling unit; and then the base station sends the scheduling parameters to the user equipment, and after the user equipment receives the scheduling parameters, the user equipment sends data on the target scheduling unit according to the scheduling parameters and the distribution information of the target scheduling unit. Therefore, the base station sends the scheduling parameters to the user equipment, so that the user equipment sends data by combining the scheduling parameters on the basis of the distribution information of the target scheduling unit, and the technical scheme of the application is further perfected.
In other possible implementations, the base station may not detect that there is data transmission on the target scheduling unit before decoding the data, and the base station may not be able to decode the data. Therefore, before the base station decodes the data, the base station can detect whether the data transmission exists on the target scheduling unit; if the data exists, the base station judges whether the data is the data sent by the user equipment according to the cyclic shift of the pilot frequency sequence of the user equipment, and if the data exists, the base station can decode the data; if not, the base station detects whether data transmission exists on the target scheduling unit of the next period. It can be seen that since the UE has no SR request, the base station does not know when the UE will transmit uplink data, and therefore the base station will perform detection on all scheduling units (including the target scheduling unit). Since the base station may allocate the same target scheduling unit to a plurality of UEs, the data transmitted on the target scheduling unit may be data transmitted by other UEs, that is, the data carried on the target scheduling unit may be data transmitted by the UE, may also be data transmitted by other UEs, and may also be data transmitted by the UE and other UEs together, and the UEs on the same scheduling unit may be distinguished by cyclic shift of the pilot sequence, and therefore the base station may determine whether the data is data transmitted by the UE according to the cyclic shift of the pilot sequence of the UE, thereby further perfecting the technical scheme of the present application.
In another possible implementation manner, specifically, the determining, by the base station, whether the data is the data sent by the user equipment according to the cyclic shift of the pilot sequence of the user equipment may be: the base station judges whether the cyclic shift root sequence of the pilot frequency sequence of the user equipment is sent, and if yes, the base station determines that the data is the data sent by the user equipment. Therefore, the method for judging whether the data is the data sent by the user equipment is provided, and the technical scheme of the application is perfected.
In other possible implementations, the decoding of the data by the base station may be: the base station performs channel estimation through the DMRS to obtain a channel estimation result, where the channel estimation result may include a channel estimation value and other measurement values; and the base station decodes the data according to the channel estimation result. Therefore, channel estimation is performed through the DMRS to help the base station demodulate and decode data.
In other possible implementations, the determining, by the base station, the scheduling retransmission policy according to the decoding result may include: if the decoding result is a correct decoding result, the base station determines not to send scheduling retransmission indication information to the user equipment; and if the decoding result is an error decoding result, the base station determines to send scheduling retransmission indication information to the user equipment.
In other possible implementation manners, if the decoding result is an erroneous decoding result, the target scheduling unit is a target scheduling unit of a kth period, and k is an integer greater than or equal to 1, the determining, by the base station, a scheduling retransmission policy according to the decoding result may include: the base station determines scheduling retransmission indicating information which is transmitted by data on a target scheduling unit of the jth period and is transmitted to the user equipment according to the decoding result, wherein j is greater than k and is an integer; or, the base station determines, according to the decoding result, to send scheduling retransmission indication information, where j is greater than k and is an integer, to the user equipment, where the scheduling unit of the jth period is different from the target scheduling unit. Therefore, the implementation mode provides two scheduling retransmission modes, one mode is a mode that data is sent on a target scheduling unit corresponding to the user equipment in the follow-up process, and the other mode is a mode that the base station selects another scheduling unit to retransmit the data, so that the selectivity and the diversity of the scheme of the application are increased.
In other possible implementations, assuming that the data is first data, after the base station determines to send scheduling retransmission indication information to the ue, if the base station does not detect that the ue responds to the scheduling retransmission indication information in a jth period and detects second data sent by the ue in the jth period, the base station determines that the scheduling retransmission indication information is false alarm indication information, and then the base station decodes the second data. Therefore, the base station ensures that the retransmission caused by the false alarm and the initial transmission of the second data do not conflict with each other according to the false alarm indication information.
In other possible implementation manners, the target scheduling unit includes at least two orthogonal frequency division multiplexing symbols or at least two single-carrier frequency division multiplexing symbols, frequency domain starting positions of the orthogonal frequency division multiplexing symbols in the target scheduling unit may be the same or different, and frequency domain starting positions of the single-carrier frequency division multiplexing symbols in the target scheduling unit may be the same or different.
In other possible implementation manners, the pattern of the target scheduling unit hops in a frequency domain of the same carrier unit; or, the pattern of the target scheduling unit hops over different carriers of the carrier aggregation.
A second aspect of the embodiments of the present invention further provides a data transmission method, which may include: after the base station distributes a target scheduling unit to the user equipment according to the determined uplink channel quality of the user equipment, the base station generates distribution information of the target scheduling unit and sends the distribution information of the target scheduling unit to the user equipment, and the user equipment receives the distribution information of the target scheduling unit and sends data to the base station on the target scheduling unit according to the distribution information of the target scheduling unit so that the base station can decode the data to obtain a decoding result; the target scheduling unit appears periodically in a time domain, is one type of at least two scheduling units of different types preset by the base station, and has different time-frequency resources. Therefore, the base station can divide the scheduling units with different resource granularities for the user equipment according to the uplink channel quality of the user equipment, and compared with the prior art that the scheduling units with the same resource granularity can only be divided for the user equipment, the technical scheme of the application can allocate the most appropriate scheduling units for the user equipment, so that the time-frequency resource utilization rate is improved, the resource waste is reduced, and the frequency spectrum efficiency is improved.
In some possible implementation manners, the base station sends allocation information of resource positions of the SRS to the user equipment; the user equipment sends the SRS to the base station according to the allocation information of the SRS resource position; the base station determines the uplink channel quality of the user equipment according to the SRS; and the base station allocates the target scheduling unit to the user equipment according to the uplink channel quality.
In other possible implementation manners, after the base station allocates the periodic target scheduling unit to the user equipment according to the uplink channel quality, the base station may also negotiate the scheduling parameter of the DMRS with the user equipment, where the scheduling parameter includes a root sequence, a cyclic shift, a transmission block set, and a modulation manner, that is, the base station may determine the scheduling parameter of the DMRS according to the allocation information of the target scheduling unit; and then the base station sends the scheduling parameters to the user equipment, and after the user equipment receives the scheduling parameters, the user equipment sends data on the target scheduling unit according to the scheduling parameters and the distribution information of the target scheduling unit. Therefore, the base station sends the scheduling parameters to the user equipment, so that the user equipment sends data by combining the scheduling parameters on the basis of the distribution information of the target scheduling unit, and the technical scheme of the application is further perfected.
In other possible implementation manners, the user equipment sends data to the base station on the target scheduling unit according to the allocation information of the target scheduling unit, the base station decodes the data to obtain a decoding result, and if the decoding result is an erroneous decoding result, the base station sends scheduling retransmission indication information to the user equipment, so that the user equipment retransmits the data.
A third aspect of an embodiment of the present invention provides a base station, where the base station is configured to implement the functions of the method provided in the first aspect or any optional implementation manner of the first aspect, and the base station is implemented by software, where the software includes modules corresponding to the functions, and each module is configured to execute a corresponding function.
A fourth aspect of the embodiments of the present invention provides a user equipment, where the user equipment is configured to implement the functions of the method provided in any optional implementation manner of the second aspect or the second aspect, and the user equipment is implemented by software, where the software includes modules corresponding to the functions, and each module is configured to execute a corresponding function.
A fifth aspect of the embodiments of the present invention provides a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the method of the above-mentioned aspects.
A sixth aspect of the embodiments of the present invention provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
According to the technical scheme, the embodiment of the invention has the following advantages: the base station determines the quality of an uplink channel of user equipment; a base station allocates a target scheduling unit for user equipment according to the quality of an uplink channel, wherein the target scheduling unit appears periodically in a time domain; and the base station sends the allocation information of the target scheduling unit to the user equipment. Obviously, the base station can divide scheduling units with different resource granularities for the user equipment according to the uplink channel quality of the user equipment, compared with the existing scheme, the technical scheme of the application can allocate the most appropriate scheduling unit for the user equipment, so that the time-frequency resource utilization rate is improved, the resource waste is reduced, and the frequency spectrum efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic diagram of an embodiment of a data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of different types of scheduling units preset by a base station in the embodiment of the present invention;
fig. 3 is a schematic diagram of two scheduling retransmission methods according to an embodiment of the present invention;
FIG. 4 is a diagram of an embodiment of a base station in an embodiment of the present invention;
fig. 5 is a schematic diagram of another embodiment of a base station in the embodiment of the present invention;
fig. 6 is a schematic diagram of another embodiment of a base station in the embodiment of the present invention;
fig. 7 is a schematic diagram of another embodiment of a base station in the embodiment of the present invention;
fig. 8 is a schematic diagram of an embodiment of a user equipment in the embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a data transmission method, a base station and user equipment, which can improve the utilization rate of time-frequency resources, reduce resource waste and improve the frequency spectrum efficiency.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The terms "first," "second," "third," and "fourth," if any, in the description and claims of this application and the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that, in the embodiment of the present invention, the base station may reserve time domain dimensional resources and frequency domain dimensional resources with different granularities as a scheduling unit, where the scheduling unit includes a plurality of frequency domain RBs and time domain symbols, and the scheduling unit appears periodically in the time domain. For the UEs with better uplink channel quality, the scheduling units with more frequency domain RBs and fewer time domain symbols may be allocated, while the scheduling units with less frequency domain RBs and more time domain symbols may be allocated to the UEs with worse uplink channel quality.
The base station may measure the uplink channel quality of the UE according to a Sounding Reference Signal (SRS) of the UE, and allocate an optimal scheduling unit to the UE in advance. In addition, the UEs with close uplink channel quality can be allocated to the same scheduling unit, so as to improve the utilization efficiency of resources and improve the spectrum efficiency.
When the UE has a service requirement, the UE does not need to send an SR request, and the UE can directly send data on a pre-allocated scheduling unit. When the UE transmits data on the scheduling unit, the UE may also transmit DMRSs, where DMRSs of different UEs need to be orthogonal to each other, so that the base station detects the different UEs.
Referring to fig. 1, a data transmission method in an embodiment of the present invention is described below with reference to a specific embodiment, where an embodiment of the data transmission method in the embodiment of the present invention includes:
101. a base station allocates SRS resource positions for user equipment;
in this embodiment, the base station allocates the SRS resource location to the UE, so that the UE can send the corresponding SRS according to the allocation information of the SRS resource location.
It should be noted that, in practical applications, the base station may allocate the same SRS resource location for multiple UEs, or the base station may allocate different SRS resource locations for multiple UEs.
For example, if the ue in step 101 is the first ue and the base station further allocates the SRS resource location to the second ue, the SRS resource location allocated by the base station to the first ue and the SRS resource location allocated by the base station to the second ue may be the same or different.
102. The base station sends the allocation information of the resource position of the SRS to the user equipment;
in this embodiment, after the base station allocates the SRS resource location to the UE, the base station may send allocation information of the SRS resource location to the UE.
103. The user equipment sends the SRS to the base station according to the allocation information of the SRS resource position;
in this embodiment, after receiving the allocation information of the SRS resource location sent by the base station, the UE may periodically send the SRS to the base station according to the allocation information of the SRS resource location.
104. The base station determines the uplink channel quality of the user equipment according to the SRS;
in this embodiment, after the base station receives the SRS sent by the UE according to the allocation information of the SRS resource location, the base station may determine the uplink channel quality of the UE according to the SRS.
In some possible embodiments, the uplink channel quality is a channel quality of a single Carrier unit (CC) or a channel quality of at least two CCs, and the uplink channel quality is determined by at least one of the following parameters: signal to Interference plus Noise Ratio (SINR) and SINR fluctuation variance. It is understood that the uplink channel quality may also be determined by other parameters, which are not limited herein.
105. The base station distributes a target scheduling unit for the user equipment according to the quality of the uplink channel;
in this embodiment, the target scheduling units appear periodically in the time domain, that is, the target scheduling units are periodically distributed in the time domain, the target scheduling units are one type of at least two scheduling units of different types preset by the base station, and the scheduling units of different types have different time-frequency resources.
For example, the base station may use several consecutive frequency domain RBs and time domain symbols as a basic scheduling unit, and the basic scheduling unit exhibits a certain periodicity in the time domain. As shown in fig. 2, fig. 2 provides a schematic structural diagram of different types of scheduling units preset by a base station, where the scheduling unit a in fig. 2 occupies 10 RBs in the frequency domain and occupies 2 symbols in the time domain; the scheduling unit B occupies 5 RBs in the frequency domain and 4 symbols in the time domain. The scheduling unit exhibits a certain periodicity in the time domain. Because the uplink channel of the UE is often limited in power, in order to ensure a certain frequency domain signal-to-noise ratio, when the UE is far away from the base station, the RB can be contracted to select a scheduling unit B for the UE; when the UE is close to the base station, the power has a margin, and a scheduling unit A with a larger RB can be selected for the UE. And the base station reserves a plurality of basic scheduling units for resource allocation of the URLLC according to the time delay requirement of the URLLC.
The base station can allocate the target scheduling unit to the UE according to the uplink channel quality of the UE and the time delay requirement of the URLLC.
106. The base station determines the scheduling parameters of the DMRS according to the allocation information of the target scheduling unit;
in this embodiment, the base station may determine, according to the allocation information of the target scheduling unit and the scheduling parameter of the DMRS agreed by the UE, the scheduling parameter may include information such as a root sequence, cyclic shift, TBS, and a modulation scheme.
107. The base station sends the scheduling parameters to the user equipment and sends the allocation information of the target scheduling unit to the user equipment;
in this embodiment, the base station may send the scheduling parameter to the UE in a semi-static manner.
It should be noted that, the base station may first send the scheduling parameter to the user equipment, and then send the allocation information of the target scheduling unit to the user equipment; or, the base station may first send the allocation information of the target scheduling unit to the user equipment, and then send the scheduling parameter to the user equipment; or, the base station may simultaneously transmit the scheduling parameter and the allocation information of the target scheduling unit to the user equipment.
108. The user equipment judges whether data to be sent exist or not; if yes, go to step 109;
in this embodiment, if the user equipment determines that there is no data to be sent, the user equipment continues to detect whether there is data to be sent.
109. The user equipment sends data on the target scheduling unit according to the scheduling parameters and the allocation information of the target scheduling unit;
in this embodiment, if there is data to be sent, after receiving the scheduling parameter sent by the base station and the allocation information of the target scheduling unit, the UE sends the data on the target scheduling unit according to the scheduling parameter and the allocation information of the target scheduling unit.
It should be noted that the base station allocates different root sequences and cyclic shifts to each UE, and the base station can distinguish each UE according to the different root sequences and cyclic shifts. The TBS and the modulation mode are adapted to different channel qualities, so that the data can be transmitted correctly.
110. The base station detects whether data transmission exists on the target scheduling unit, if so, the step 111 is executed, and if not, the step 114 is executed;
in this embodiment, since the UE has no SR request, the base station does not know when the UE will transmit uplink data, and therefore the base station will perform detection on all scheduling units (including the target scheduling unit). That is, the base station detects whether there is data transmission on the target scheduling unit, if so, performs step 111, and if not, performs step 114.
111. The base station judges whether the data is the data sent by the user equipment according to the cyclic shift of the pilot frequency sequence of the user equipment, if so, the step 112 is executed, and if not, the step 114 is executed;
in this embodiment, since the base station may allocate the same target scheduling unit to a plurality of UEs, the data transmitted on the target scheduling unit may be data transmitted by other UEs, that is, the data carried on the target scheduling unit may be data transmitted by the UE itself, may also be data transmitted by other UEs, and may also be data transmitted by the UE itself and other UEs together, and the UEs on the same scheduling unit may be distinguished by cyclic shift of the pilot sequence, so the base station may determine whether the data is data transmitted by the UE according to the cyclic shift of the pilot sequence of the UE. It should be noted that, if the base station determines that the data is not data transmitted by the UE, the base station may further detect whether the data is data transmitted by another UE, and if the data is not data transmitted by another UE, the base station may detect whether there is data transmission on the target scheduling unit in the next period, that is, execute step 114.
Specifically, in some possible embodiments, the determining, by the base station, whether the data is the data sent by the user equipment according to the cyclic shift of the pilot sequence of the user equipment includes:
the base station judges whether the cyclic shift root sequence of the pilot frequency sequence of the user equipment is sent, and if yes, the base station determines that the data is the data sent by the user equipment.
112. The base station decodes the data to obtain a decoding result;
in this embodiment, the base station may perform channel estimation through the DMRS to obtain a channel estimation result; and the base station decodes the data according to the channel estimation result to obtain a decoding result.
Specifically, the base station may use the DMRS for Channel estimation to obtain a Channel estimation result, such as a Channel estimation value and some measurement values, and demodulate and decode data sent by the UE, such as a Physical Uplink Shared Channel (PUSCH), according to the Channel estimation result.
It should be noted that, if the data includes both the data sent by the UE and the data sent by other UEs, the base station may perform joint detection or iterative detection and decoding on the data to improve reliability.
113. The base station determines a scheduling retransmission strategy according to the decoding result;
in this embodiment, if the decoding result is a correct decoding result, the base station determines not to send scheduling retransmission indication information to the UE; and if the decoding result is an error decoding result, the base station determines to send scheduling retransmission indication information to the UE.
In some possible embodiments, if the base station does not detect that the ue responds to the scheduling retransmission indication information, the base station continues to send the scheduling retransmission indication information to the ue.
Further, in some possible embodiments, when the number of times that the base station sends the scheduling retransmission indication information to the ue reaches the preset value, that is, the base station does not detect that the ue responds to the scheduling retransmission indication information for several times, the base station abandons sending the scheduling retransmission indication information to the ue, that is, the base station abandons detecting the target scheduling unit, so as to save resources.
In the embodiment, a base station determines the quality of an uplink channel of user equipment; a base station allocates a target scheduling unit for user equipment according to the quality of an uplink channel, wherein the target scheduling unit appears periodically in a time domain; and the base station sends the allocation information of the target scheduling unit to the user equipment. Obviously, the base station can divide scheduling units with different resource granularities for the user equipment according to the uplink channel quality of the user equipment, compared with the existing scheme, the technical scheme of the application can allocate the most appropriate scheduling unit for the user equipment, so that the time-frequency resource utilization rate is improved, the resource waste is reduced, and the frequency spectrum efficiency is improved.
Specifically, in some possible embodiments, if the decoding result is an erroneous decoding result, the target scheduling unit is a target scheduling unit of a kth period, k is greater than or equal to 1, and k is an integer, the determining, by the base station, a scheduling retransmission policy according to the decoding result may include:
the base station determines scheduling retransmission indicating information which is transmitted by data on a target scheduling unit of the jth period and is transmitted to the user equipment according to the decoding result, wherein j is greater than k and is an integer; or the like, or, alternatively,
and the base station determines scheduling retransmission indication information which is sent by the data sent to the user equipment on a scheduling unit different from the target scheduling unit in the jth period according to the decoding result, wherein j is greater than k and is an integer.
It can be seen that two retransmission scheduling manners are provided in the embodiment of the present invention, specifically referring to fig. 3, and fig. 3 is a schematic diagram of two retransmission scheduling manners provided in the embodiment of the present invention, where a retransmission scheduling manner 1 is to transmit data on a target scheduling unit subsequently corresponding to the UE, a retransmission scheduling manner 2 is to select another scheduling unit for the base station to retransmit data, and in practical applications, the base station generally selects a second retransmission scheduling manner.
In addition, when the target scheduling unit includes multiple Transmission Time Intervals (TTIs), the base station may select to schedule one retransmission or may select to schedule multiple retransmissions, so that the reliability and the delay may be flexibly controlled.
Further, in some possible embodiments, if the data is the first data, after the determining, by the base station, that the scheduling retransmission indication information is sent to the user equipment, the method further includes:
if the base station does not detect that the user equipment responds to the scheduling retransmission indication information in the jth period and the base station detects second data sent by the user equipment in the jth period, the base station decodes the second data.
In this embodiment, after the base station sends the scheduling retransmission indication information, the base station performs scheduling on both a retransmission resource block (target scheduling unit) and a current initial transmission resource block, where data on the retransmission resource block is first data and data on the current initial transmission resource block is second data, and if data is detected only on the initial transmission resource block, the base station determines that the scheduling retransmission indication information is false alarm indication information, and at this time, the base station only processes data on the initial transmission resource block. And if the data is detected on the retransmission resource block, processing retransmission and combination.
114. The base station detects whether data transmission exists on the target scheduling unit of the next period.
In this embodiment, if the base station does not detect that there is data transmission on the target scheduling unit, the base station detects whether there is data transmission on the target scheduling unit in the next period. Or, if the base station judges that the data is not the data sent by the user equipment according to the cyclic shift of the pilot frequency sequence of the user equipment, the base station detects whether data transmission exists on the target scheduling unit of the next period.
It can be understood that, if the base station detects that there is data transmission on the target scheduling unit of the next period, step 111 to step 113 may be repeatedly executed later, which is not described herein again. Otherwise, the base station will continue to detect whether there is data transmission on the target scheduling unit in a period after the detection until a decoding result is obtained, and determine a retransmission strategy.
Optionally, in some possible embodiments, the target scheduling unit includes at least two Orthogonal Frequency Division Multiplexing (OFDM) symbols or at least two Single-carrier Frequency Division Multiplexing (SC-FDMA) symbols, a Frequency domain starting position of each OFDM symbol in the target scheduling unit may be the same or different, and a Frequency domain starting position of each SC-FDMA symbol in the target scheduling unit may be the same or different.
Optionally, in some possible embodiments, the pattern of the target scheduling unit hops in a frequency domain of the same CC; or, the pattern of the target scheduling unit hops over different carriers of a Carrier Aggregation (CA).
The data transmission method in the embodiment of the present invention is described above by way of an embodiment, and the base station in the embodiment of the present invention is described below by way of an embodiment, with reference to fig. 4, where an embodiment of the base station in the embodiment of the present invention includes:
a first determining module 201, configured to determine uplink channel quality of a user equipment;
an allocating module 202, configured to allocate a target scheduling unit to the user equipment according to the uplink channel quality determined by the first determining module 201, where the target scheduling unit appears periodically in a time domain;
a first sending module 203, configured to send the allocation information of the target scheduling unit to the user equipment.
In this embodiment, the first determining module 201 determines the uplink channel quality of the ue; the allocation module 202 allocates a target scheduling unit to the user equipment according to the uplink channel quality, wherein the target scheduling unit appears periodically in a time domain; the first sending module 203 sends the allocation information of the target scheduling unit to the user equipment. Obviously, the base station can divide scheduling units with different resource granularities for the user equipment according to the uplink channel quality of the user equipment, compared with the existing scheme, the technical scheme of the application can allocate the most appropriate scheduling unit for the user equipment, so that the time-frequency resource utilization rate is improved, the resource waste is reduced, and the frequency spectrum efficiency is improved.
Optionally, referring to fig. 5, in some possible embodiments, the base station may further include: a decoding module 204, configured to decode the data to obtain a decoding result if it is detected that the user equipment sends the data on the target scheduling unit according to the allocation information of the target scheduling unit; a second determining module 205, configured to determine a scheduling retransmission policy according to the decoding result.
Optionally, in some possible embodiments, the first determining module 201 is specifically configured to allocate a resource location of a sounding reference signal SRS to a user equipment; sending the allocation information of the resource position of the SRS to the user equipment; receiving an SRS sent by user equipment according to the allocation information of the SRS resource position; and determining the uplink channel quality of the user equipment according to the SRS.
Further, the uplink channel quality is a channel quality of a carrier component CC, and the uplink channel quality is determined by at least one of the following parameters: signal to interference plus noise ratio, SINR, and variance of SINR fluctuations.
Further, referring to fig. 6, in some possible embodiments, the base station further includes:
a third determining module 301, configured to determine, after the allocating module 202 allocates the target scheduling unit to the user equipment according to the uplink channel quality, a scheduling parameter of a demodulation reference signal DMRS according to allocation information of the target scheduling unit, where the scheduling parameter includes at least one of a root sequence, a cyclic shift, a transport block TBS, and a modulation scheme;
a second sending module 302, configured to send the scheduling parameter to the user equipment, so that the user equipment sends data on the target scheduling unit according to the scheduling parameter and the allocation information of the target scheduling unit.
Further, the base station further includes:
a detecting module 303, configured to detect whether there is data transmission on the target scheduling unit before the decoding module 204 decodes the data;
a processing module 304, configured to determine whether data is data sent by the user equipment according to cyclic shift of a pilot sequence of the user equipment if there is data transmission on the target scheduling unit, and if so, trigger the decoding module 204 to decode the data;
the detecting module 303 is further configured to detect whether there is data transmission on the target scheduling unit in the next period if there is no data transmission on the target scheduling unit.
The processing module 304 is specifically configured to determine whether a cyclic shifted root sequence of a pilot sequence of the user equipment is sent, and if so, determine that the data is the data sent by the user equipment.
The second determining module 205 is specifically configured to determine not to send scheduling retransmission indication information to the ue if the decoding result is a correct decoding result; and if the decoding result is an error decoding result, determining to send scheduling retransmission indication information to the user equipment.
If the decoding result is an erroneous decoding result, the target scheduling unit is a target scheduling unit of a kth period, k is greater than or equal to 1, and k is an integer, the second determining module 205 is specifically configured to determine, according to the decoding result, second scheduling retransmission indication information that data is sent to the user equipment on the target scheduling unit of the jth period, where j is greater than k and j is an integer; or, determining scheduling retransmission indication information that data is transmitted to the user equipment in a scheduling unit different from the target scheduling unit in the jth period according to the decoding result, wherein j is greater than k and is an integer.
Further, the decoding module 204 is further configured to decode the second data if the data is the first data, and if the response scheduling retransmission indication information of the ue is not detected in the jth period and the second data sent by the ue is detected in the jth period.
The target scheduling unit comprises at least two Orthogonal Frequency Division Multiplexing (OFDM) symbols or at least two single-carrier frequency division multiplexing (SC-FDMA) symbols.
The pattern of the target scheduling unit hops on the frequency domain of the same CC; or, the pattern of the target scheduling unit hops on different carriers of the carrier aggregation CA.
In the above, the base station in the embodiment of the present invention is described from the perspective of the modular functional entity, and in the following, the base station in the embodiment of the present invention is described from the perspective of hardware processing, referring to fig. 7, and the base station in the embodiment of the present invention includes: a processor 401, a transmitter 402, and a memory 403.
Embodiments of the invention may involve a base station having more or fewer components than those shown in fig. 7, two or more components may be combined, or a different configuration or arrangement of components may be realized in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
Processor 401 is configured to perform the following operations:
determining the uplink channel quality of user equipment;
and allocating a target scheduling unit to the user equipment according to the uplink channel quality, wherein the target scheduling unit has periodicity and appears periodically in a time domain.
The transmitter 402 is configured to perform the following operations:
and sending the allocation information of the target scheduling unit to the user equipment.
The memory 403 is used for storing codes required by the processor 401 to perform corresponding operations.
In this embodiment, the processor 401 determines the uplink channel quality of the user equipment; the processor 401 allocates a target scheduling unit to the user equipment according to the uplink channel quality, wherein the target scheduling unit appears periodically in a time domain; the transmitter 402 transmits allocation information of the target scheduling unit to the user equipment. Obviously, the base station can divide scheduling units with different resource granularities for the user equipment according to the uplink channel quality of the user equipment, compared with the existing scheme, the technical scheme of the application can allocate the most appropriate scheduling unit for the user equipment, so that the time-frequency resource utilization rate is improved, the resource waste is reduced, and the frequency spectrum efficiency is improved.
Processor 401 is also configured to perform the following operations:
if the user equipment is detected to send data on the target scheduling unit according to the distribution information of the target scheduling unit, decoding the data to obtain a decoding result;
and determining a scheduling retransmission strategy according to the decoding result.
Processor 401 is also configured to perform the following operations:
allocating resource positions of Sounding Reference Signals (SRS) for user equipment; sending the allocation information of the resource position of the SRS to the user equipment; receiving an SRS sent by user equipment according to the allocation information of the SRS resource position; and determining the uplink channel quality of the user equipment according to the SRS.
It should be noted that the uplink channel quality may be a channel quality of a carrier component CC, and the uplink channel quality is determined by at least one of the following parameters: signal to interference plus noise ratio, SINR, and variance of SINR fluctuations.
Processor 401 is also configured to perform the following operations:
determining a scheduling parameter of a demodulation reference signal (DMRS) according to allocation information of a target scheduling unit, wherein the scheduling parameter comprises at least one of a root sequence, cyclic shift, a Transport Block Set (TBS) and a modulation mode;
accordingly, the transmitter 402 is further configured to:
and sending the scheduling parameters to the user equipment so that the user equipment can send data on the target scheduling unit according to the scheduling parameters and the allocation information of the target scheduling unit.
Processor 401 is also configured to perform the following operations:
detecting whether data transmission exists on a target scheduling unit;
if the target scheduling unit has data transmission, judging whether the data is the data sent by the user equipment according to the cyclic shift of the pilot frequency sequence of the user equipment, and if so, triggering the step of decoding the data;
processor 401 is also configured to perform the following operations:
and if the target scheduling unit does not have data transmission, detecting whether the target scheduling unit in the next period has data transmission.
Processor 401 is also configured to perform the following operations:
and judging whether the cyclic shift root sequence of the pilot frequency sequence of the user equipment is sent or not, if so, determining that the data is the data sent by the user equipment.
Processor 401 is also configured to perform the following operations:
performing channel estimation through the DMRS to obtain a channel estimation result; and decoding the data according to the channel estimation result.
Processor 401 is also configured to perform the following operations:
if the decoding result is a correct decoding result, determining not to send scheduling retransmission indication information to the user equipment; and if the decoding result is an error decoding result, determining to send scheduling retransmission indication information to the user equipment.
Processor 401 is also configured to perform the following operations:
if the decoding result is an error decoding result, the target scheduling unit is a target scheduling unit of a kth period, k is greater than or equal to 1 and is an integer, determining scheduling retransmission indicating information which is used for transmitting data to the user equipment on the target scheduling unit of the jth period according to the decoding result, wherein j is greater than k and is an integer; or, determining scheduling retransmission indication information that data is transmitted to the user equipment in a scheduling unit different from the target scheduling unit in the jth period according to the decoding result, wherein j is greater than k and is an integer.
Processor 401 is also configured to perform the following operations:
if the data is the first data, if the response scheduling retransmission indicating information of the user equipment is not detected in the jth period and the second data sent by the user equipment is detected in the jth period, decoding the second data.
Referring to fig. 8, a user equipment in an embodiment of the present invention is described below, where an embodiment of the user equipment in the embodiment of the present invention includes:
a receiving module 501, configured to receive allocation information of a target scheduling unit sent by a base station, where the target scheduling unit is allocated to a user equipment by the base station according to a determined uplink channel quality of the user equipment, and the target scheduling unit appears periodically in a time domain;
a sending module 502, configured to send data to the base station on the target scheduling unit according to the allocation information of the target scheduling unit, so that the base station decodes the data to obtain a decoding result.
In this embodiment, the sending module 502 can send data to the base station on the target scheduling unit according to the received allocation information of the target scheduling unit, where the target scheduling unit is the most appropriate scheduling unit selected by the base station according to the uplink channel quality of the user equipment, and the most appropriate scheduling unit is the target scheduling unit, so as to improve the time-frequency resource utilization rate, reduce resource waste, and improve the spectrum efficiency.
Optionally, in some possible embodiments, the sending module 502 is specifically configured to send data to the base station on the target scheduling unit according to the received scheduling parameter and the allocation information of the target scheduling unit, where the scheduling parameter is determined by the base station according to the allocation information of the target scheduling unit, and the scheduling parameter includes at least one of a root sequence of a demodulation reference signal DMRS, a cyclic shift, a transport block set, TBS, and a modulation scheme.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (24)

1. A method of data transmission, comprising:
the base station determines the quality of an uplink channel of user equipment;
the base station allocates a target scheduling unit to the user equipment according to the uplink channel quality, the target scheduling unit appears periodically in a time domain, the target scheduling unit is one type of at least two scheduling units of different types preset by the base station, and the scheduling units of different types have different time-frequency resources;
and the base station sends the allocation information of the target scheduling unit to the user equipment.
2. The method of claim 1, wherein after the base station transmits the allocation information of the target scheduling unit to the user equipment, the method further comprises:
if the base station receives data sent by the user equipment on the target scheduling unit, the base station decodes the data to obtain a decoding result;
and the base station determines a scheduling retransmission strategy according to the decoding result.
3. The method of claim 2, wherein the uplink channel quality is a channel quality of a Carrier Component (CC), and wherein the uplink channel quality is determined by at least one of the following parameters: signal to interference plus noise ratio, SINR, and variance of SINR fluctuations.
4. The method of claim 3, wherein the base station further comprises, after allocating a target scheduling unit to the user equipment according to the uplink channel quality:
the base station determines a scheduling parameter of a demodulation reference signal (DMRS) according to the allocation information of the target scheduling unit, wherein the scheduling parameter comprises at least one of a root sequence, cyclic shift, Transport Block Set (TBS) and a modulation mode;
and the base station sends the scheduling parameters to the user equipment so that the user equipment can send the data on the target scheduling unit according to the scheduling parameters and the distribution information of the target scheduling unit.
5. The method of claim 4, wherein the base station, prior to decoding the data, comprises:
the base station detects whether data transmission exists on the target scheduling unit;
if the data exists, the base station judges whether the data is the data sent by the user equipment according to the cyclic shift of the pilot frequency sequence of the user equipment, and if the data exists, the base station is triggered to decode the data;
and if not, the base station detects whether data transmission exists on the target scheduling unit of the next period.
6. The method of claim 5, wherein the determining, by the base station, whether the data is the data transmitted by the user equipment according to the cyclic shift of the pilot sequence of the user equipment comprises:
and the base station judges whether a cyclic shift root sequence of the pilot frequency sequence of the user equipment is sent, and if so, the base station determines that the data is the data sent by the user equipment.
7. The method of claim 6, wherein if the decoding result is an erroneous decoding result, the target scheduling unit is a target scheduling unit of a k-th cycle, k is greater than or equal to 1, and k is an integer, the determining, by the base station, a scheduling retransmission policy according to the decoding result comprises:
the base station determines to send scheduling retransmission indication information, which is sent by the data on a target scheduling unit in the jth period, to the user equipment according to the decoding result, wherein j is greater than k and is an integer; or the like, or, alternatively,
and the base station determines to send scheduling retransmission indication information of the data sent on a scheduling unit different from the target scheduling unit in the jth period to the user equipment according to the decoding result, wherein j is greater than k and is an integer.
8. The method of claim 7, wherein if the data is first data, the method further comprises:
if the base station does not detect that the user equipment responds to the scheduling retransmission indication information in the jth period, and the base station detects second data sent by the user equipment in the jth period, the base station decodes the second data.
9. The method according to any of claims 1 to 8, wherein the target scheduling unit comprises at least two orthogonal frequency division multiplexing, OFDM, symbols or at least two single-carrier frequency division multiplexing, SC-FDMA, symbols.
10. The method of any of claims 1 to 8, wherein the pattern of the target scheduling unit hops over the frequency domain of the same CC; or, the pattern of the target scheduling unit hops on different carriers of the carrier aggregation CA.
11. A method of data transmission, comprising:
the method comprises the steps that user equipment receives allocation information of a target scheduling unit sent by a base station, the target scheduling unit is allocated to the user equipment by the base station according to the determined uplink channel quality of the user equipment, the target scheduling unit appears periodically in a time domain, the target scheduling unit is one type of at least two scheduling units of different types preset by the base station, and the scheduling units of different types have different time-frequency resources;
and the user equipment sends data to the base station on the target scheduling unit according to the distribution information of the target scheduling unit so that the base station can decode the data to obtain a decoding result.
12. The method of claim 11, wherein the ue transmitting data to the base station on the target scheduling unit according to the allocation information of the target scheduling unit comprises:
the user equipment sends data to the base station on the target scheduling unit according to the received scheduling parameters and the allocation information of the target scheduling unit, wherein the scheduling parameters are determined by the base station according to the allocation information of the target scheduling unit, and the scheduling parameters comprise at least one of a root sequence, a cyclic shift, a Transport Block Set (TBS) and a modulation mode of a demodulation reference signal (DMRS).
13. A base station, comprising:
a first determining module, configured to determine uplink channel quality of a user equipment;
the allocation module is used for allocating a target scheduling unit to the user equipment according to the uplink channel quality, the target scheduling unit appears periodically in a time domain, the target scheduling unit is one type of at least two scheduling units of different types preset by the base station, and the scheduling units of different types have different time-frequency resources;
a first sending module, configured to send the allocation information of the target scheduling unit to the user equipment.
14. The base station of claim 13, wherein the base station further comprises:
the decoding module is used for decoding the data sent by the user equipment to obtain a decoding result if the data is received on the target scheduling unit;
and the second determining module is used for determining a scheduling retransmission strategy according to the decoding result.
15. The base station of claim 14, wherein the uplink channel quality is a channel quality of a carrier component CC, and wherein the uplink channel quality is determined by at least one of the following parameters: signal to interference plus noise ratio, SINR, and variance of SINR fluctuations.
16. The base station of claim 15, wherein the base station further comprises:
a third determining module, configured to determine, after the allocating module allocates a target scheduling unit to the user equipment according to the uplink channel quality, a scheduling parameter of a demodulation reference signal DMRS according to allocation information of the target scheduling unit, where the scheduling parameter includes at least one of a root sequence, a cyclic shift, a transport block set, TBS, and a modulation scheme;
a second sending module, configured to send the scheduling parameter to the ue, so that the ue sends the data on the target scheduling unit according to the scheduling parameter and the allocation information of the target scheduling unit.
17. The base station of claim 16, wherein the base station further comprises:
a detection module, configured to detect whether there is data transmission on the target scheduling unit before the decoding module decodes the data;
a processing module, configured to determine whether the data is data sent by the user equipment according to cyclic shift of a pilot sequence of the user equipment if there is data transmission on the target scheduling unit, and if so, trigger the decoding module to decode the data;
the detection module is further configured to detect whether data transmission exists in the target scheduling unit of the next cycle if data transmission does not exist in the target scheduling unit.
18. The base station of claim 17, wherein the processing module is specifically configured to determine whether a root sequence of a cyclic shift of a pilot sequence of the ue is sent, and if so, determine that the data is the data sent by the ue.
19. The base station of claim 18, wherein if the decoding result is an erroneous decoding result, the target scheduling unit is a target scheduling unit of a kth period, k is greater than or equal to 1 and k is an integer, the second determining module is specifically configured to determine, according to the decoding result, scheduling retransmission indication information that the data is sent to the ue on the target scheduling unit of the jth period, where j is greater than k and j is an integer; or, determining, according to the decoding result, scheduling retransmission indication information that the data is transmitted on a scheduling unit different from the target scheduling unit in the jth period to the user equipment, where j is greater than k and is an integer.
20. The base station of claim 19, wherein the decoding module is further configured to decode second data sent by the ue if the data is first data and if the ue is not detected to respond to the scheduled retransmission indication information in a jth period and the second data is detected in the jth period.
21. The base station according to any of claims 13 to 20, characterized in that the target scheduling unit comprises at least two orthogonal frequency division multiplexing, OFDM, symbols or at least two single carrier frequency division multiplexing, SC-FDMA, symbols.
22. The base station according to any of claims 13 to 20, wherein the pattern of the target scheduling unit hops over the frequency domain of the same CC; or, the pattern of the target scheduling unit hops on different carriers of the carrier aggregation CA.
23. A user device, comprising:
a receiving module, configured to receive allocation information of a target scheduling unit sent by a base station, where the target scheduling unit is allocated to the user equipment by the base station according to the determined uplink channel quality of the user equipment, the target scheduling unit appears periodically in a time domain, the target scheduling unit is one type of at least two different types of scheduling units preset by the base station, and the different types of scheduling units have different time-frequency resources;
and the sending module is used for sending data to the base station on the target scheduling unit according to the distribution information of the target scheduling unit so that the base station can decode the data to obtain a decoding result.
24. The ue of claim 23, wherein the sending module is specifically configured to send data to the base station on the target scheduling unit according to the received scheduling parameter and the allocation information of the target scheduling unit, the scheduling parameter is determined by the base station according to the allocation information of the target scheduling unit, and the scheduling parameter includes at least one of a root sequence of a DMRS, a cyclic shift, a TBS, and a modulation scheme.
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