CN116456479A - Uplink data transmission method, device, communication equipment and storage medium - Google Patents
Uplink data transmission method, device, communication equipment and storage medium Download PDFInfo
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- 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
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application relates to an uplink data transmission method, an uplink data transmission device, communication equipment and a storage medium. And under the condition that the terminal is positioned at the cell far point position, the terminal can transmit uplink data by adopting a preconfigured first symbol length in a first time slot, and repeatedly transmit the uplink data by adopting a second symbol length which is larger than the first symbol length in a second time slot adjacent to the first time slot. The terminal repeatedly sends the same uplink data to the base station, so that the reliability of uplink data transmission can be improved; meanwhile, when the terminal transmits uplink data to the base station in the second time slot, the power allocated to each resource block is increased by increasing the second symbol length compared with the first symbol length, and the reliability of uplink data transmission is improved.
Description
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to an uplink data transmission method, an uplink data transmission device, a communication device, and a storage medium.
Background
With the development of wireless communication technology, a URLLC (Ultra Reliable Low Latency Communication, ultra-high reliability and low latency transmission) technology has emerged, in which, in order to achieve ultra-low latency and ultra-high reliability transmission of small packet data, a sub-slot architecture of mini-slot (micro slot) and a high reliability MCS (Modulation and CodingScheme, modulation and coding strategy) technology are introduced.
However, in the URLLC related art, there is a problem in that the reliability of data transmission is low when the mini-slot technique and the high reliability MCS technique are used.
Disclosure of Invention
The embodiment of the application provides an uplink data transmission method, an uplink data transmission device, communication equipment and a storage medium, which can improve the reliability of data transmission.
In a first aspect, the present application provides an uplink data transmission method for a terminal. The method comprises the following steps:
under the condition that the terminal is positioned at a cell far point position, uplink data is sent by adopting a preconfigured first symbol length in a first time slot;
repeatedly transmitting the uplink data in a second time slot by adopting a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the method further comprises:
and judging whether the terminal is positioned at the cell far point position according to the transmitting power of the terminal and the modulation and coding strategy.
In one embodiment, the determining whether the terminal is in the cell far point position according to the transmitting power of the terminal and the modulation and coding strategy includes:
if the transmitting power is full transmitting power and the index value of the modulation and coding strategy is not greater than a preset threshold value, determining that the terminal is positioned at a cell far point position;
And if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than the preset threshold value, determining that the terminal is at a non-cell far point position.
In one embodiment, the method further comprises:
and determining the modulation and coding strategy according to the channel state corresponding to the uplink data.
In one embodiment, the method further comprises:
and under the condition that the terminal is positioned at a non-cell far point position, transmitting uplink data by adopting a preconfigured first symbol length in a first time slot.
In one embodiment, the second symbol length is greater than the first symbol length and less than or equal to 14.
In a second aspect, the present application further provides an uplink data transmission method, which is used for a base station, and the method includes:
the method comprises the steps that uplink data sent by a receiving terminal in a first time slot by adopting a preconfigured first symbol length;
receiving the uplink data repeatedly transmitted by the terminal in a second time slot by adopting a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the method further comprises:
demodulating according to uplink data sent by the terminal in the first time slot;
If demodulation is successful, discarding the uplink data sent by the terminal in the second time slot;
and if the demodulation fails, demodulating the uplink data sent by the terminal in the second time slot.
In a third aspect, the present application further provides an uplink data transmission device, configured to be used in a terminal, where the device includes:
the first sending module is used for sending uplink data by adopting a preconfigured first symbol length in a first time slot under the condition that the terminal is positioned at a cell far point position;
a second transmitting module, configured to repeatedly transmit the uplink data in a second slot using a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the apparatus further comprises:
and the judging module is used for judging whether the terminal is positioned at the cell far point position according to the transmitting power of the terminal and the modulation and coding strategy.
In one embodiment, the judging module includes:
a first determining unit, configured to determine that the terminal is located at a cell far point position if the transmission power is full and the index value of the modulation and coding strategy is not greater than a preset threshold;
And the second determining unit is used for determining that the terminal is positioned at a non-cell far point position if the transmitting power is not full transmitting power and/or the index value of the modulation and coding strategy is greater than the preset threshold value.
In one embodiment, the apparatus further comprises:
and the determining module is used for determining the modulation and coding strategy according to the channel state corresponding to the uplink data.
In one embodiment, the apparatus further comprises:
and the third sending module is used for sending uplink data by adopting a preconfigured first symbol length in the first time slot under the condition that the terminal is positioned at a non-cell far point position.
In one embodiment, the second symbol length is greater than the first symbol length and less than or equal to 14.
In a fourth aspect, the present application further provides an uplink data transmission apparatus, for a base station, where the apparatus includes:
the first receiving module is used for receiving uplink data sent by the terminal in a first time slot by adopting a preconfigured first symbol length;
a second receiving module, configured to receive the uplink data that is repeatedly sent by the terminal in a second slot by using a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the apparatus further comprises:
the first sending module is used for demodulating uplink data sent by the terminal in a first time slot;
the second sending module is used for discarding the uplink data sent by the terminal in the second time slot if the demodulation is successful;
and the third sending module is used for demodulating the uplink data sent by the terminal in the second time slot if demodulation fails.
In a fifth aspect, the present application also provides a communication device. The computer device comprises a transceiver, a memory storing a computer program and a processor implementing the steps of the above method when the processor executes the computer program.
In a sixth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the above method.
According to the uplink data transmission method, the device, the communication equipment and the storage medium, under the condition that the terminal is located at the cell far point position, the terminal can transmit uplink data by adopting a preconfigured first symbol length in a first time slot, and repeatedly transmit the uplink data by adopting a second symbol length which is larger than the first symbol length in a second time slot adjacent to the first time slot. In the conventional technology, when the terminal is located at a cell far point position, the pre-configured symbol length is adopted to send uplink data to the base station only once, and when the terminal sends the uplink data, more resource blocks need to be allocated on a frequency domain, the power allocated by each resource block is low, so that the reliability of uplink data transmission is lower. In the embodiment of the application, firstly, the terminal repeatedly sends the same uplink data to the base station, so that the reliability of the uplink data transmission can be improved; meanwhile, when the terminal transmits uplink data to the base station in the second time slot, the power allocated to each resource block is increased by increasing the second symbol length compared with the first symbol length, and the reliability of uplink data transmission is improved.
Drawings
Fig. 1 is an application environment diagram of an uplink data transmission method provided in an embodiment of the present application;
fig. 2 is a PRB number and RE power comparison diagram of an eMBB and a URLLC provided in an embodiment of the present application;
fig. 3 is a schematic flow chart of an uplink data transmission method according to an embodiment of the present application;
fig. 4 is a diagram of power and transmission block comparison of a first time slot and a second time slot according to an embodiment of the present application;
fig. 5 is a second comparison diagram of power and transmission blocks of a first time slot and a second time slot according to an embodiment of the present application;
fig. 6 is a second flowchart of an uplink data transmission method according to an embodiment of the present application;
fig. 7 is a third flow chart of an uplink data transmission method according to the embodiment of the present application;
fig. 8 is a complete example flowchart of an uplink data transmission method according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of an uplink data transmission device according to an embodiment of the present application;
fig. 10 is a second schematic structural diagram of an uplink data transmission device according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The positioning method provided by the embodiment of the application can be applied to an application environment shown in fig. 1. Wherein the terminal 101 is connected to the base station 102 via an air interface, wherein the terminal 101 may be a wireless terminal, which may be a device providing voice and/or other service data connectivity to a user, or a handheld device having wireless connection functionality, or other processing device connected to a wireless modem. A wireless terminal may communicate with one or more core networks via a radio access network (Radio Access Network, RAN for short), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. A wireless Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), mobile Station (Mobile), remote Station (Remote Station), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Terminal (User Terminal), user Agent (User Agent), user equipment (User Device or User Equipment), without limitation. The terminal can be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, internet of things equipment and portable wearable equipment, and the internet of things equipment can be smart speakers, smart televisions, smart air conditioners, smart vehicle-mounted equipment and the like. The portable wearable device may be a smart watch, smart bracelet, headset, or the like.
The base station 102 may be a base station (Base Transceiver Station, BTS) in global mobile communication (Global System of Mobile communication, GSM) or code division multiple access (Code Division MultipleAccess, CDMA), a base station (NodeB, NB) in wideband code division multiple access (Wideband Code DivisionMultiple Access, WCDMA), an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or access point, a base station in a 5G network, or the like, which is not limited herein.
In the related technology of URLLC, the technology of mini-slot, high reliability MCS and the like is introduced for realizing the ultra-low time delay and the ultra-high reliability of the packet data. The URLLC terminal uses mini-slot and high reliability (99.999%) MCS to transmit data at a mid-far point, and when the MCS Index is lower than 5, the spectrum efficiency is about one fourth of the common (90%) MCS, and compared with the common MCS, the URLLC terminal needs 4 times of time-frequency resources to transmit data; on the other hand, since the uplink data is transmitted using fewer symbols in the mini-slot time domain, when the terminal transmits the data in the uplink, it needs to transmit the data on more PRBs (Physical Resource Block, physical Resource blocks) in the frequency domain, for example, using 2 symbols mini-slot, and transmitting the same data compared with the eMBB (Enhanced Mobile Broadband ) using Type a of 4-14 symbols, where the number of allocated RBs (Resource blocks) in the URLLC frequency domain is 20 times that of the eMBB. Even if a 14 symbol mini-slot is used, the multiple is up to about 4 times. Because the terminal basically adopts a full-power transmission mode to improve the uplink rate in order to overcome the link loss at the middle and far points, whereas URLLC uses more RBs in the frequency spectrum to transmit uplink data, when the same data volume is transmitted, the power allocated to each uplink RB is only 5% -25% of that of the eMBB mode, so that the actual reliability of the high-reliability MCS is difficult to reach 99.999%.
The eMBB system adopts scheduling according to Time slots, and uses a 90% reliability MCS coding table, so that 90% reliability and Round Trip Time (RTT) of about 10-14ms can be realized for single transmission, and the scheme basically meets the Internet surfing requirements of general users. But because of the requirements of shorter time delay and higher reliability facing to the vertical industries such as enterprises and the like and industrial Internet control and the like, the R15 URLLC adopts the technologies such as mini-slot, high-reliability MCS and the like. The PUSCH (Physical Uplink Shared Channel ), which is called Mini-slot, adopts a Type-B resource allocation scheme, and is specified by the 3GPP standard. The resource allocation manner may refer to table 1. The 3GPP standard is based on GSMMAP core network, and the WCDMA is used as wireless interface to make the third generation mobile communication standard.
TABLE 1
S represents a time domain start symbol position, L represents a time domain length (symbol length), and s+l represents a symbol length range at the start symbol position. In the Type B mode, the number L of symbols which can be distributed on the PDSCH in time is in the range of 1-14, and the value L is smaller in order to shorten the air interface time delay. On the other hand, when the URLLC adopts high-reliability MCS and the MCS is the same, the spectrum efficiency is 25% -81% of the common MCS, and as the URLLC adopts fewer symbols in the time domain, the ratio of the high-reliability MCS spectrum efficiency to the common MCS spectrum efficiency is lower as the MCS index is smaller, the number of RBs used by the URLLC at the far point position is more than that of eBMM.
TABLE 2
Table 2 is a high-low reliability spectral efficiency ratio corresponding to the MCS index value. When the network planning is performed by referring to the table 2,5G, for the uplink planning of the ebb scene, generally, 10 RBs are allocated for uplink transmission according to the requirement that the terminal transmission power is full power (in actual cases, different manufacturers can perform the value of different RB numbers according to the performance of their own home devices), and the data amount that can be transmitted by using 10 RBs in one uplink time slot of the ebb and the URLLC is calculated according to two cases of mcs=0 and 5 as follows:
（1）MCS=0
the eMBB uses a TypeA scheduling method, and the amount of transmittable data of 10×168 (1-0.08) in one uplink slot using 10 RBs is 10× 0.2344 =362 bit.
The URLLC uses a TypeC scheduling method, and assuming that the symbol length is 7, the amount of transmittable data of 10×168 (7/14) (1-0.08) 0.0586=45 bits for one uplink slot using 10 RBs.
（2）MCS=5
The eMBB uses a TypeA scheduling mode, and uplink one time slot uses 10 RBs to send data volume as follows
10*168*（1-0.08）*0.7402=1044 bit。
The URLLC uses a TypeC scheduling method, and assuming that the symbol length is 7, the amount of transmittable data of 10×168 (7/14) (1-0.08) 0.1934 =148 bits for one uplink slot using 10 RBs.
If the terminal is at the cell far point position, under the condition that the URLLC uses TypeB l=7, the resource of 10 RBs can only transmit 45bit data when mcs=0, and can only transmit 148bit data when mcs=5. If small data of 32 bytes (256 bits) needs to be transmitted at a time, 57 RBs are needed for mcs=0, 18 RBs are needed for mcs=5, which corresponds to 7.6dB and 2.4dB power drop per RE (Resource Element), it is obvious that the reliability of data is difficult to maintain 99.999% due to the drop of RE transmit power. If the same amount of data 362bit for ebb is to be transmitted at mcs=0, it can also be calculated that the power allocated by URLLC to each RE is reduced by 9dB at mcs=0 and by 3.9dB at mcs=5. Since the terminal power is reduced more, the reliability of the uplink data, although using a MCS of 99.999%, may be reduced to 99.9% or 99% or even lower.
Referring to fig. 2, fig. 2 is a diagram of PRB number and RE power comparison of an eMBB and URLLC according to an embodiment of the present application. When MCS is 0, 362bit data is transmitted, eMBB uses 10rb×14 symbol resources, URLLC uses 80rb×7 symbol resources, and the power of each RE of URLLC is 9dB lower than that of eMBB. (here calculated as 23dBm for UE maximum transmit power). According to the analysis, the URLLC terminal at the far point can ensure the power of each RE and increase the data delay if the URLLC terminal is split to transmit in a plurality of time slots under the condition that the data transmission is completed by one scheduling and the reliability is reduced due to the reduction of the power when the data of the URLLC terminal at the far point reaches small data packets with the sizes of 32Byte, 64Byte and the like at one time.
Therefore, as the URLLC scene uses a mini-slot sub-slot architecture, when the terminal transmits uplink data, more RBs need to be allocated on the frequency domain; in addition, the requirement for time-frequency resources is high by using the high-reliability MCS technique, and a large number of RBs (Resource blocks) are also required. And the frequency spectrum adopts a mode of transmitting uplink data by more RBs, the allocated power of each RB is low, the channel ratio of each RB is reduced, and the reliability of uplink data transmission is lower.
Based on the above conventional technology, the embodiment of the present application provides an uplink data transmission method, which brings the technical effect of improving the reliability of uplink data transmission by repeatedly sending uplink data and increasing the symbol length of the uplink data sent by the second timeslot.
It should be noted that the beneficial effects or the technical problems to be solved by the embodiments of the present application are not limited to this one, but may be other implicit or related problems, and particularly, reference may be made to the following description of embodiments.
The following describes the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
In one embodiment, an uplink data transmission method is provided, and fig. 3 is one of flow diagrams of the uplink data transmission method provided in the embodiment of the present application, and the method is applied to the terminal in fig. 1 for illustration, and includes the following steps:
s301, when the terminal is at a cell far point position, uplink data is sent in a first time slot by adopting a preconfigured first symbol length.
Wherein, the cell can include the coverage range of the wireless signal of a base station; the remote point location may include a location that is further from the base station; the cell far point location may include a location far from the base station within the range that the wireless signal of the base station can cover. A subframe may include a plurality of slots, which may be a specific time interval; the first time slot may comprise a time slot in which certain uplink data is transmitted for the first time. The preconfigured first symbol length may be a symbol length configured according to the URLLC protocol. The symbol length may include a Type-B PUSCH symbol length. The Mini-slot adopts a resource allocation mode of Type-B.
Specifically, in the case that the terminal is at the cell far point position, the terminal may transmit uplink data to the base station in the current slot by using a Type-B PUSCH symbol length configured in advance according to the URLLC protocol.
S302, repeatedly transmitting uplink data by adopting a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
Wherein the second time slot may be an adjacent time slot to the first time slot, i.e. the second time slot may be the next time slot after the first time slot. The second symbol length may be greater than the first symbol length. Preferably, the second symbol length may be 14.
In this embodiment of the present application, the terminal may repeat sending the same uplink data to the base station in a second slot adjacent to the first slot by using a second symbol length greater than the first symbol length.
Alternatively, the second symbol length may be greater than the first symbol length, and the second symbol length needs to be less than or equal to 14. Preferably, the second symbol length is equal to 14.
Since the number of transmission blocks RB to be allocated in the frequency domain decreases as the second symbol length increases, the power allocated per RB increases at the time of full power transmission, and thus the reliability of uplink data transmission can be improved.
For example, referring to fig. 4, fig. 4 is one of power and transmission block comparison diagrams of a first time slot and a second time slot provided in the embodiments of the present application, where the symbol length used by a terminal in a URLLC scenario for uplink data transmitted for the first time is 7, where the first time slot TypeB PUSCH l=7, uplink data needs to be transmitted to a base station on 80 PRBs; and the second time slot repeatedly transmits the uplink data of the first time slot, and if the second time slot TypeB PUSCH l=14, the uplink data needs to be transmitted to the base station on 40 PRBs, and the transmission power of RE of the second time slot is 3dB higher than that of the first power.
For another example, referring to fig. 5, fig. 5 is a second comparison chart of power and transmission blocks of a first time slot and a second time slot provided in the embodiment of the present application, where the symbol length used by the terminal in the url scene for uplink data transmitted for the first time is 4, and at this time, the first time slot TypeB PUSCH l=4 needs to transmit uplink data to the base station on 80 PRBs; and the second time slot repeatedly transmits the uplink data of the first time slot, and if the second time slot TypeB PUSCH l=14, the uplink data needs to be transmitted to the base station on 23 PRBs, and the transmission power of the RE of the second time slot is 5.41dB higher than that of the first power.
It is to be noted that, assuming that the first slot transmits uplink data to the base station, the reliability is difficult to reach 99.999% due to the decrease in the RE transmit power. Assuming that the reliability is a% at this time, the RE transmit power increases when the second slot transmits uplink data to the base station, and the reliability is b%, where b > a, the two transmissions reliability is: 1- (1-a%) (1-b%). For the transmission of the first time slot, the different symbol length L will result in different RE transmit power enhancement levels and different reliability for the second transmission relative to the first data transmission, as described in the following table 3.
In the uplink data transmission method, when the terminal is at the cell far point position, the terminal can transmit uplink data by adopting a preconfigured first symbol length in a first time slot, and repeatedly transmit uplink data by adopting a second symbol length larger than the first symbol length in a second time slot adjacent to the first time slot. In the conventional technology, when the terminal is located at a cell far point position, the pre-configured symbol length is adopted to send uplink data to the base station only once, and when the terminal sends the uplink data, more resource blocks need to be allocated on a frequency domain, the power allocated by each resource block is low, so that the reliability of uplink data transmission is lower. In the embodiment of the application, firstly, the terminal repeatedly sends the same uplink data to the base station, so that the reliability of the uplink data transmission can be improved; meanwhile, when the terminal transmits uplink data to the base station in the second time slot, the power allocated to each resource block is increased by increasing the second symbol length compared with the first symbol length, and the reliability of uplink data transmission is improved.
TABLE 3 Table 3
In the embodiment shown in fig. 3, when the terminal is located at the cell far point position, the reliability of the uplink data is improved by repeatedly transmitting the uplink data and increasing the symbol length during the repeated transmission. In the following, an implementation manner of determining whether a terminal is located at a cell far point is mainly described. The uplink data transmission method further comprises the following steps:
and judging whether the terminal is positioned at the cell far point position according to the transmitting power of the terminal and the modulation and coding strategy.
Wherein, the MCS takes the factors which are concerned and influence the communication rate as the columns of the table, takes the MCS index value as the row, and forms a rate table.
Optionally, in the embodiment of the present application, the modulation and coding policy may be determined according to a channel state corresponding to the uplink data. The channel conditions may include, among other things, propagation characteristics of the communication link, such as scattering, fading, power attenuation, etc. in the channel.
In the embodiment of the application, when the terminal has a requirement for sending uplink data, the terminal can select an appropriate modulation and coding strategy MCS according to the channel state corresponding to the uplink data.
The MCS generally adopts modulation schemes such as QPSK (Quadrature Phase Shift Keying ), 16QAM (16Quadrature AmplitudeModulation,16 quadrature amplitude modulation), 64QAM (64Quadrature Amplitude Modulation), and the like, the channel state is generally represented by a value of 1 to 15, different values correspond to different MCSs,
For example, when the channel state value is 1-6, the corresponding MCS is QPSK; when the channel state value is 7-9, the corresponding MCS is QPSK; when the channel state value is 9-15, the corresponding MCS is 64QAM.
In this embodiment, the modulation and coding strategy is determined according to the channel state corresponding to the uplink data, and the transmission rate of the uplink data can be improved due to the selection of the modulation and coding strategy applicable to the channel state.
In this embodiment of the present application, the terminal may perform initial determination on the location of the terminal according to the size of the transmitting power of the terminal and the size of the index value of the modulation and coding policy to obtain an initial result of the terminal, and transmit the initial result to the server for analysis, and analyze and correct the initial result, and determine whether the terminal is located at the cell far point location according to the result after analysis and correction.
In this embodiment, the terminal may determine whether the terminal is located at a cell far point position according to the transmitting power and the modulation and coding policy of the terminal. Because the transmitting power of the terminal and the physical transmission rate reacted by the modulation and coding strategy are considered to judge whether the terminal is positioned at the cell far point position, the accuracy of judging the terminal position can be improved.
In one embodiment, the present application relates to a possible implementation manner of determining whether a terminal is in a cell far point position according to a transmitting power and a modulation and coding strategy of the terminal, where the method includes the following steps based on the above embodiment:
in the first scheme, if the transmitting power is full transmitting power and the index value of the modulation and coding strategy is not greater than a preset threshold value, the terminal is determined to be at the cell far point position.
For example, if the preset threshold is 9 and the index value of the coding strategy is 7 and the transmission power of the terminal is full, it can be determined that the terminal is located at the far point position of the cell.
It should be noted that, the preset threshold value of the modulation and coding strategy MCS is preferably 9, when MCS is less than or equal to 9, QPSK modulation is adopted, and the terminal is basically located at the far point position.
And in the second scheme, if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than a preset threshold value, determining that the terminal is at a non-cell far point position.
In the embodiment of the application, if the transmitting power of the terminal is not the full transmitting power and the index value of the system and coding strategy is greater than the preset threshold value, the terminal can be determined to be at the non-cell far point position; in addition, if the transmitting power of the terminal is not full transmitting power, or the index value of the system and coding strategy is larger than a preset threshold value, the terminal can be determined to be in a non-cell far point position.
For example, if the preset threshold is 9, the index value of the coding strategy is 10, and the transmission power of the terminal is full, it can be determined that the terminal is at a non-cell far point position. For another example, if the preset threshold is 9 and the index value of the coding strategy is 7 and the transmission power of the terminal is not the full transmission power, it can be determined that the terminal is at the non-cell far point position.
In this embodiment, if the transmission power is full, and the index value of the modulation and coding strategy is not greater than the preset threshold, it is determined that the terminal is located at the cell far point position. If the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than a preset threshold value, determining that the terminal is at a non-cell far point position. Because whether the terminal is positioned at the cell far point position or not is judged by considering whether the transmitting power of the terminal is full power or not and whether the index value of the modulation and coding strategy meets the preset threshold value or not, the accuracy of judging the terminal position can be improved.
In one embodiment, the uplink data transmission method further includes:
and under the condition that the terminal is positioned at a non-cell far point position, transmitting uplink data by adopting a preconfigured first symbol length in a first time slot.
Specifically, if the terminal is at a non-cell far point position, the terminal can send uplink data to the base station by adopting a preconfigured first symbol length in a first time slot, and then the transmission of single uplink data can be completed.
For example, if the terminal is in a non-cell far point position, the terminal may send uplink data to the base station in the first slot using a scheme with a symbol length of 7.
In this embodiment, when the terminal is at a non-cell far point position, uplink data is transmitted in the first slot by using a first symbol length that is configured in advance. That is, when the terminal is at a non-cell far point position, the terminal can transmit uplink data to the base station only once by adopting the preconfigured first symbol length, so that the reliability of uplink data transmission can be met, and the scene adaptability is higher.
In an embodiment, a second flow chart of an uplink data transmission method provided in the embodiment of the present application is provided in fig. 6, and the method is applied to the base station in fig. 1 for illustration, and includes the following steps:
s601, the receiving terminal adopts the preconfigured uplink data sent by the first symbol length in the first time slot.
Specifically, the base station may receive uplink data sent by the terminal in the first slot by using a preconfigured first symbol length. For example, if the terminal uses a preconfigured scheme with a first symbol length of 7 to send uplink data in the first time slot, the base station may receive the uplink data sent by the terminal using the scheme with the first symbol length of 7.
S602, the receiving terminal repeatedly transmits uplink data with a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
Specifically, the base station may receive uplink data repeatedly transmitted by the terminal in a second slot adjacent to the first slot using a second symbol length greater than the first symbol length. For example, if the terminal repeatedly transmits uplink data in the second slot using the scheme with the second symbol length of 14, the base station may receive the uplink data repeatedly transmitted by the terminal using the scheme with the second symbol length of 14.
Alternatively, the second symbol length may be greater than the first symbol length, and the second symbol length needs to be less than or equal to 14. Preferably, the second symbol length is equal to 14.
Since the number of transmission blocks RB to be allocated in the frequency domain decreases as the second symbol length increases, the power allocated per RB increases at the time of full power transmission, and thus the reliability of uplink data transmission can be improved.
In the uplink data transmission method, the base station can receive uplink data sent by the terminal in a first time slot by adopting a preconfigured first symbol length, and the receiving terminal repeatedly sends the uplink data in a second time slot by adopting a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length. In the conventional technology, when the terminal is located at a cell far point position, the pre-configured symbol length is adopted to send uplink data to the base station only once, and when the terminal sends the uplink data, more resource blocks need to be allocated on a frequency domain, the power allocated by each resource block is low, so that the reliability of uplink data transmission is lower. In the embodiment of the application, firstly, the terminal repeatedly sends the same uplink data to the base station, so that the reliability of the uplink data transmission can be improved; meanwhile, when the terminal transmits uplink data to the base station in the second time slot, the power allocated to each resource block is increased by increasing the second symbol length compared with the first symbol length, and the reliability of uplink data transmission is improved.
In an embodiment, fig. 7 is a third flow chart of an uplink data transmission method according to the embodiment of the present application, where the uplink data transmission method further includes:
S701, demodulating according to uplink data sent by the terminal in the first time slot.
Specifically, after receiving the uplink data sent by the terminal in the first time slot, the base station may demodulate the uplink data, that is, verify the check code included in the uplink data in the first time slot, so as to obtain whether the uplink data in the first time slot is correct.
S702, scheme one: if demodulation is successful, discarding uplink data sent by the terminal in the second time slot; scheme II: and if the demodulation fails, demodulating the uplink data sent by the terminal in the second time slot.
Specifically, if demodulation is successful, the base station may discard uplink data sent by the terminal in the second time slot, which indicates that the uplink data in the first time slot is correct; if the demodulation fails, it indicates that the uplink data sent in the first time slot is wrong, and at this time, the terminal can demodulate the uplink data sent in the second time slot.
In this embodiment, the base station may demodulate the uplink data sent by the terminal in the first time slot, discard the uplink data sent by the terminal in the second time slot if demodulation is successful, and demodulate the uplink data sent by the terminal in the second time slot if demodulation is failed. If the base station receives the uplink data sent by the terminal only once, after the demodulation of the uplink data fails, the base station needs to send a demodulation failure message to the terminal, and after receiving the demodulation failure message, the terminal also needs to send the uplink data to the base station again, thereby bringing larger time delay. In the embodiment of the application, since the terminal can repeatedly send the uplink data, the base station can receive the uplink data twice, if the uplink data received for the first time is not successfully demodulated, the demodulation failure message is not required to be sent to the terminal, and the uplink data received for the second time can be directly demodulated, so that the time delay for acquiring the accurate uplink data is reduced.
In a complete embodiment, fig. 8 is a complete exemplary flowchart of an uplink data transmission method provided in the embodiment of the present application, and the steps are as follows:
s801, when a terminal has a requirement of sending uplink data, the terminal determines a modulation and coding strategy according to a channel state corresponding to the uplink data;
s802, the terminal judges whether the terminal is positioned at a cell far point position according to the transmitting power of the terminal and a modulation and coding strategy;
scheme one,
S8021, if the transmitting power is full transmitting power and the index value of the modulation and coding strategy is not greater than a preset threshold value, determining that the terminal is positioned at the cell far point position;
s8023, the terminal adopts a preconfigured first symbol length to transmit uplink data in a first time slot;
s8025, the base station receives uplink data sent by a terminal in a first time slot by adopting a preconfigured first symbol length;
s8027, the terminal repeatedly transmits uplink data by adopting a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length and less than or equal to 14.
S8029, the base station receives uplink data which is repeatedly transmitted by the terminal in a second time slot by adopting a second symbol length;
S8031, the base station demodulates the uplink data sent by the terminal in the first time slot; if demodulation is successful, discarding uplink data sent by the terminal in the second time slot; and if the demodulation fails, demodulating the uplink data sent by the terminal in the second time slot.
Scheme II,
S8022, if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than a preset threshold value, determining that the terminal is at a non-cell far point position;
s8024, the terminal adopts a preconfigured first symbol length to transmit uplink data in a first time slot;
s8026, the base station receives uplink data sent by a terminal in a first time slot by adopting a preconfigured first symbol length;
s8032, the base station demodulates the uplink data sent by the terminal in the first time slot; and if demodulation fails, sending a retransmission request to the terminal.
It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides an uplink data transmission device for implementing the uplink data transmission method. The implementation of the solution provided by the apparatus is similar to that described in the above method, so the specific limitation of the embodiment of one or more uplink data transmission apparatuses provided below may be referred to above for limitation of the uplink data transmission method, and will not be repeated here.
In one embodiment, fig. 9 is one of structural diagrams of an uplink data transmission device provided in the embodiment of the present application, and as shown in fig. 9, an uplink data transmission device 900 is provided, and is used for a terminal, and includes: a first sending module 901, a second sending module 902, wherein:
a first sending module 901, configured to send uplink data by using a first symbol length that is configured in advance in a first slot when the terminal is located at a cell far point position;
a second transmitting module 902, configured to repeatedly transmit uplink data in a second slot with a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the apparatus 900 further comprises:
And the judging module is used for judging whether the terminal is positioned at the cell far point position according to the transmitting power of the terminal and the modulation and coding strategy.
In one embodiment, the judging module includes:
the first determining unit is used for determining that the terminal is positioned at a cell far point position if the transmitting power is full transmitting power and the index value of the modulation and coding strategy is not greater than a preset threshold value;
and the second determining unit is used for determining that the terminal is positioned at the non-cell far point position if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than a preset threshold value.
In one embodiment, the apparatus 900 further comprises:
and the determining module is used for determining a modulation and coding strategy according to the channel state corresponding to the uplink data.
In one embodiment, the apparatus 900 further comprises:
and the third sending module is used for sending uplink data by adopting a preconfigured first symbol length in the first time slot under the condition that the terminal is positioned at a non-cell far point position.
In one embodiment, the second symbol length is greater than the first symbol length and less than or equal to 14.
In an embodiment, fig. 10 is a second schematic structural diagram of an uplink data transmission device according to the embodiment of the present application, as shown in fig. 10, there is provided an uplink data transmission device 1000, for use in a base station, including: a first receiving module 1001, a second receiving module 1002, wherein:
A first receiving module 1001, configured to receive uplink data sent by a terminal in a first slot by using a first symbol length that is configured in advance;
a second receiving module 1002, configured to receive uplink data repeatedly sent by the terminal in a second slot with a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the apparatus further comprises:
the first sending module is used for demodulating uplink data sent by the terminal in a first time slot;
the second sending module is used for discarding the uplink data sent by the terminal in the second time slot if the demodulation is successful;
and the third sending module is used for demodulating the uplink data sent by the terminal in the second time slot if demodulation fails.
The above-mentioned respective modules in the uplink data transmission apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device may include a transceiver 1101, a memory 1102, a processor 1103, at least one communication bus 1104. The communication bus 1104 is used to enable communication connections between the elements. Memory 1002 may comprise high-speed RAM memory or may further comprise non-volatile storage NVM, such as at least one magnetic disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiment. In this embodiment, the transceiver 1101 may be a radio frequency processing module or a baseband processing module in a communication device, and the transceiver 1101 may be coupled to the processor 1103, which may implement an action of receiving and transmitting under the instruction or control of the processor 1103.
In this embodiment, the processor 1103 controls the transceiver 1101, and when the terminal is at the cell far point position, uplink data is sent in a first time slot by using a preconfigured first symbol length, and uplink data is repeatedly sent in a second time slot by using a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the processor 1103 controls the transceiver 1101 to determine whether the terminal is in a cell remote point location by according to the transmit power and modulation and coding strategy of the terminal.
In one embodiment, the processor 1103 controls the transceiver 1101 to determine that the terminal is at the cell far point position if the transmission power is full and the index value of the modulation and coding strategy is not greater than the preset threshold;
if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than a preset threshold value, determining that the terminal is at a non-cell far point position.
In one embodiment, the processor 1103 controls the transceiver 1101 to determine the modulation and coding scheme by determining the channel state corresponding to the uplink data.
In one embodiment, the processor 1103 controls the transceiver 1101 to transmit uplink data by using a preconfigured first symbol length in a first time slot in a case that the terminal is in a non-cell far point position.
In one embodiment, the processor 1103 controls the transceiver 1101 such that the second symbol length is greater than the first symbol length and less than or equal to 14.
In one embodiment, the processor 1103 controls the transceiver 1101 to receive uplink data sent by the terminal in the first slot using a preconfigured first symbol length; the receiving terminal repeatedly transmits uplink data with a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the processor 1103 controls the transceiver 1101 to demodulate according to uplink data sent by the terminal in the first slot; if demodulation is successful, discarding uplink data sent by the terminal in the second time slot; and if the demodulation fails, demodulating the uplink data sent by the terminal in the second time slot.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
under the condition that the terminal is positioned at a cell far point position, uplink data is sent by adopting a preconfigured first symbol length in a first time slot;
repeatedly transmitting uplink data by adopting a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and judging whether the terminal is positioned at the cell far point position according to the transmitting power of the terminal and the modulation and coding strategy.
In one embodiment, the computer program when executed by the processor further performs the steps of:
if the transmitting power is full transmitting power and the index value of the modulation and coding strategy is not greater than a preset threshold value, determining that the terminal is positioned at a cell far point position;
if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than a preset threshold value, determining that the terminal is at a non-cell far point position.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and determining a modulation and coding strategy according to the channel state corresponding to the uplink data.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and under the condition that the terminal is positioned at a non-cell far point position, transmitting uplink data by adopting a preconfigured first symbol length in a first time slot.
In one embodiment, the computer program when executed by the processor also achieves that the second symbol length is greater than the first symbol length and less than or equal to 14.
In one embodiment, the computer program when executed by the processor further performs the steps of:
the method comprises the steps that uplink data sent by a receiving terminal in a first time slot by adopting a preconfigured first symbol length;
the receiving terminal repeatedly transmits uplink data with a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
In one embodiment, the computer program when executed by the processor further performs the steps of:
demodulating according to uplink data sent by the terminal in the first time slot;
if demodulation is successful, discarding uplink data sent by the terminal in the second time slot;
and if the demodulation fails, demodulating the uplink data sent by the terminal in the second time slot.
It should be noted that, the user information (including, but not limited to, user equipment information, user personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data are required to comply with the related laws and regulations and standards of the related countries and regions.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as Static Random access memory (Static Random access memory AccessMemory, SRAM) or dynamic Random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (12)
1. An uplink data transmission method, which is used for a terminal, the method comprising:
under the condition that the terminal is positioned at a cell far point position, uplink data is sent by adopting a preconfigured first symbol length in a first time slot;
repeatedly transmitting the uplink data by adopting a second symbol length in a second time slot; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
2. The method according to claim 1, wherein the method further comprises:
and judging whether the terminal is positioned at a cell far point position according to the transmitting power of the terminal and the modulation and coding strategy.
3. The method of claim 2, wherein the determining whether the terminal is in a cell far point location according to the transmit power of the terminal and the modulation and coding strategy comprises:
if the transmitting power is full transmitting power and the index value of the modulation and coding strategy is not greater than a preset threshold value, determining that the terminal is positioned at a cell far point position;
and if the transmitting power is not the full transmitting power and/or the index value of the modulation and coding strategy is greater than the preset threshold value, determining that the terminal is positioned at a non-cell far point position.
4. A method according to claim 2 or 3, characterized in that the method further comprises:
and determining the modulation and coding strategy according to the channel state corresponding to the uplink data.
5. The method according to claim 1, wherein the method further comprises:
and under the condition that the terminal is positioned at a non-cell far point position, transmitting uplink data by adopting a preconfigured first symbol length in a first time slot.
6. A method according to any one of claims 1 to 3, wherein the second symbol length is greater than the first symbol length and less than or equal to 14.
7. An uplink data transmission method, which is used for a base station, the method comprising:
the method comprises the steps that uplink data sent by a receiving terminal in a first time slot by adopting a preconfigured first symbol length;
receiving the uplink data which are repeatedly transmitted by the terminal in a second time slot by adopting a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
8. The method of claim 7, wherein the method further comprises:
demodulating according to uplink data sent by the terminal in a first time slot;
if demodulation is successful, discarding the uplink data sent by the terminal in the second time slot;
and if the demodulation fails, demodulating the uplink data sent by the terminal in the second time slot.
9. An uplink data transmission apparatus, for a terminal, comprising:
the first sending module is used for sending uplink data by adopting a preconfigured first symbol length in a first time slot under the condition that the terminal is positioned at a cell far point position;
A second transmitting module, configured to repeatedly transmit the uplink data in a second slot using a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
10. An uplink data transmission apparatus for a base station, the apparatus comprising:
the first receiving module is used for receiving uplink data sent by the terminal in a first time slot by adopting a preconfigured first symbol length;
a second receiving module, configured to receive the uplink data that is repeatedly sent by the terminal in a second slot by using a second symbol length; the second slot is an adjacent slot to the first slot, and the second symbol length is greater than the first symbol length.
11. A communication device comprising a transceiver, a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 or of claims 7 to 8 when the computer program is executed.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6 or of claims 7 to 8.
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| CN115669148A (en) * | 2021-03-30 | 2023-01-31 | 三星电子株式会社 | Method and apparatus for transmitting uplink channel in wireless communication system |
| CN116018864A (en) * | 2020-07-31 | 2023-04-25 | 韦勒斯标准与技术协会公司 | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
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| CN113383597A (en) * | 2019-01-10 | 2021-09-10 | 夏普株式会社 | User equipment and base station for implementing repetition based on micro time slot |
| WO2021160010A1 (en) * | 2020-02-14 | 2021-08-19 | 中兴通讯股份有限公司 | Data transmission method and apparatus, device, and storage medium |
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