CN113141645A - PUCCH transmission power control method and rail transit data transmission method - Google Patents

PUCCH transmission power control method and rail transit data transmission method Download PDF

Info

Publication number
CN113141645A
CN113141645A CN202010049341.3A CN202010049341A CN113141645A CN 113141645 A CN113141645 A CN 113141645A CN 202010049341 A CN202010049341 A CN 202010049341A CN 113141645 A CN113141645 A CN 113141645A
Authority
CN
China
Prior art keywords
pucch
transmission power
actual
power
power control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010049341.3A
Other languages
Chinese (zh)
Inventor
黄国平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Potevio Information Technology Co Ltd
Original Assignee
Potevio Information Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Potevio Information Technology Co Ltd filed Critical Potevio Information Technology Co Ltd
Priority to CN202010049341.3A priority Critical patent/CN113141645A/en
Publication of CN113141645A publication Critical patent/CN113141645A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power

Abstract

The embodiment of the invention provides a PUCCH transmission power control method and a track traffic data transmission method, wherein the PUCCH transmission power control method firstly determines the actual receiving power of a single physical resource block PRB in a PUCCH at a base station side and the actual signal-to-noise ratio SNR of the single PRB; and then if the actual received power is judged and known to be larger than the first threshold and the actual SNR is smaller than the second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word. When the transmission power of the PUCCH is controlled, the actual receiving power and SNR of a single PRB in the PUCCH at the base station side are limited, so that the effective demodulation of the PUCCH can be realized, the phenomenon that the transmission power of the PUCCH overflows due to the fact that a receiver at the base station side exceeds a power threshold can be prevented, and the omission of the PUCCH is avoided.

Description

PUCCH transmission power control method and rail transit data transmission method
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a PUCCH transmission power control method and a rail transit data transmission method.
Background
A flow diagram of a conventional Physical Uplink Control Channel (PUCCH) transmission power Control method is shown in fig. 1, and first determines actual received power of a PUCCH at a base station side, calculates an actual Signal-to-Noise Ratio (SNR) of the PUCCH according to the actual received power of the PUCCH at the base station side, determines whether a difference between the actual SNR and a target Signal-to-Interference plus Noise Ratio (SINR) is 0, and controls an expected transmission power of the PUCCH at a terminal side to be the actual received power of the PUCCH at the base station side if the difference is 0; if not, generating a Transmit Power Control (TPC) command word according to the difference between the actual SNR and the target SINR, and the MAC layer issuing the TPC command word to a vehicle Access Unit (TAU) on the terminal side to Control the expected Transmit Power of the PUCCH on the terminal side to be the sum of the actual received Power of the PUCCH on the base station side and the difference between the actual SNR and the target SINR.
In the PUCCH transmission power control method adopted in the prior art, the PUCCH reception performance at the base station side is not considered, and in the case of a downlink path loss range of [ -50dB, -90dB ], if the PUCCH transmission power is strong, a receiver at the base station side may exceed a power threshold to cause power overflow, which may further cause PUCCH missed detection and reduce resources applied by a Scheduling Request (SR). This is because, for a single user, the actual SNR of the PUCCH is higher as the actual received power of the PUCCH on the base station side is higher, and thus the demodulation performance is better, but in a multi-user system, the actual SNR of the PUCCH corresponding to one user is smaller as the actual received power of the PUCCH on the base station side corresponding to other users is higher, and thus, the scheduling of the Medium Access Control (MAC) layer transmits a TPC command word that improves the actual transmitted power of the PUCCH on the terminal side according to the target SNR of the PUCCH. In the whole system, the actual transmission power of the terminal side PUCCH is larger and larger, the interference is larger, and finally, the receiver on the base station side exceeds the power threshold to cause power overflow and PUCCH omission.
Disclosure of Invention
To overcome the above problems or at least partially solve the above problems, embodiments of the present invention provide a PUCCH transmission power control method and a rail transit data transmission method.
In a first aspect, an embodiment of the present invention provides a PUCCH transmission power control method, including:
determining the actual receiving power of a single Physical Resource Block (PRB) in a PUCCH (physical uplink control channel) at the base station side and the actual signal-to-noise ratio (SNR) of the single PRB;
and if the actual received power is judged to be larger than a first threshold and the actual SNR is smaller than a second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word.
Preferably, the PUCCH transmission power control method further includes:
if the actual received power is judged to be less than or equal to the first threshold or the actual SNR is greater than or equal to the second threshold, judging whether the difference value between the actual SNR and the target SINR is 0, and if the difference value between the actual SNR and the target SINR is 0, controlling the expected transmitted power of a single PRB in the terminal side PUCCH to be the actual received power.
Preferably, the PUCCH transmission power control method further includes:
and if the difference value between the actual SNR and the target SINR is not 0, generating a TPC command word according to the difference value, and controlling the expected transmitting power of a single PRB in the terminal side PUCCH to be the sum of the actual receiving power and the difference value.
Preferably, the controlling the expected transmission power of a single PRB in a terminal-side PUCCH according to the TPC command word specifically includes:
determining corresponding compensation power according to the value of the TPC command word;
and controlling the expected transmission power of a single PRB in the terminal-side PUCCH based on the compensation power.
Preferably, when the value of the TPC command word is 0, the compensation power is-1 dB; when the value of the TPC command word under the downlink control information DCI format 1A/2A/3 is1, the compensation power is 0; and when the value of the TPC command word under the downlink control information DCI format 3A is1, the compensation power is 1.
Preferably, the first threshold is-75 dBm and the second threshold is 5 dB.
Preferably, the actual signal-to-noise ratio SNR is determined based on the expected transmit power of a single PRB in the terminal-side PUCCH and the uplink path loss.
In a second aspect, an embodiment of the present invention provides a rail transit data transmission method, including:
the transmission power control method based on the PUCCH described in the first aspect transmits the track traffic data through the PUCCH for transmission power control.
In a third aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the PUCCH transmission power control method according to the first aspect or the rail transit data transmission method according to the second aspect when executing the program.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the PUCCH transmission power control method according to the first aspect or the rail transit data transmission method according to the second aspect.
The PUCCH transmission power control method first determines the actual receiving power of a single physical resource block PRB in a PUCCH at a base station side and the actual signal-to-noise ratio SNR of the single PRB; and then if the actual received power is judged and known to be larger than the first threshold and the actual SNR is smaller than the second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word. When the transmission power of the PUCCH is controlled, the actual receiving power and SNR of a single PRB in the PUCCH at the base station side are limited, namely the maximum value of the actual receiving power and the minimum value of the SNR of the single PRB are limited, so that the effective demodulation of the PUCCH can be realized, the phenomenon that the transmission power of the PUCCH overflows due to the fact that a receiver at the base station side exceeds a power threshold can be prevented, the omission of the PUCCH is avoided, and the NOBACK problem is optimized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a conventional PUCCH transmission power control method;
fig. 2 is a flowchart illustrating a PUCCH transmission power control method according to an embodiment of the present invention;
fig. 3 shows an α in a PUCCH transmission power control method according to an embodiment of the present inventioncWhen P is 0TXAnd downlink path loss PL1The corresponding relation graph of (2);
fig. 4 shows an α in a PUCCH transmission power control method according to an embodiment of the present inventioncWhen P is 0.8TXAnd downlink path loss PL1The corresponding relation graph of (2);
fig. 5 shows an α in a PUCCH transmission power control method according to an embodiment of the present inventioncWhen P is 0.7TXAnd downlink path loss PL1The corresponding relation graph of (2);
fig. 6 is a schematic diagram of a complete flow of a PUCCH transmission power control method according to an embodiment of the present invention;
fig. 7 is a schematic flow chart of a conventional rail transit data transmission method;
fig. 8 is a schematic flow chart of a rail transit data transmission method according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a specific flow of transmission of a downlink PIS service and an FTP data service of rail transit according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a PUCCH transmission power control system according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a rail transit data transmission system according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, an embodiment of the present invention provides a PUCCH transmission power control method, including:
s21, determining the actual receiving power of a single physical resource block PRB in a PUCCH at the base station side and the actual signal-to-noise ratio SNR of the single PRB;
and S22, if the actual received power is judged to be larger than the first threshold and the actual SNR is smaller than the second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word.
Specifically, in the PUCCH transmission power Control method provided in the embodiment of the present invention, an execution main body is a Medium Access Control (MAC) layer, and the PUCCH transmission power is controlled by the MAC layer.
Step S21 is performed first. The PUCCH transmission power control formula is shown in formula (1).
Figure BDA0002370556110000051
Wherein, PPUCCH(i) Represents PUCCH transmission power in dBm, PCMAX,c(i) A specific maximum transmit power representing the PUCCH transmission power for serving cell c, i.e. the maximum power configured for serving cell c, in dBm, P0_PUCCHExpected transmission power value in dBm, PL for PUCCH transmission powercFor the link path loss calculated for the antenna port at the terminal side in serving cell c, the unit is dB, h (n)CQI,nHARQ,nSR) Is a PUCCH format-related value, where nCQINumber of bits, n, corresponding to a Channel Quality Indication (CQI)HARQTo correspond to Hybrid Automatic repeat request (Hybrid Automatic repeat)Number of positive acknowledgements/negative acknowledgements (ACK/NACK), n, in at reQuest, HARQ)SRNumber of bits corresponding to SR, ΔF_PUCCH(F) To correspond to PUCCH format (F) relative to PUCCH format 1a, ΔTxD(F ') is the power offset for PUCCH format (F'), and g (i) is the PUCCH power control adjustment state.
Determining actual received power P of Physical Resource Block (PRB) in Physical Uplink Control Channel (PUCCH) of base station sidereceiveThe actual received power P can be obtained by the measurement of the base station sidereceiveThe average received power of each antenna on the base station side is used.
When determining the actual Signal-to-Noise Ratio (SNR) of a single PRB, the actual SNR can be specifically determined by the following formula (2).
SNR＝P0_PUCCH+g(i)+(αc-1)*PL-(I+N) (2)
Where SNR refers to the actual signal-to-noise ratio of a single PRB, i.e. the signal-to-noise ratio without path loss compensation, in dB. P0_PUCCHThe unit is dBm for the expected transmit power of a single PRB in the terminal-side PUCCH. Alpha is alphacFor the cell tilt coefficient, the value is defined as: alpha is alphacE.g. {0,0.4,0.5,0.6,0.7,0.8,0.9,1 }. PL is the uplink path loss in dB. g (i) is the PUCCH power control adjustment state in dB. I is the IOTUP uplink adjacent cell interference, and the unit is dB. N is white noise interference, natural noise is-174 dBm/Hz, the bandwidth of one PRB is 180kHz, the noise is-121 dBm, 50 PRBs exist in the 10M bandwidth, and then:
N＝-174+10lg50+10lg(180000)＝-104dBm (3)
in the technical field of rail transit data transmission, P0_PUCCHIs configured to-100 dBm by default, and is generally-10 dB, the value belongs to downlink full power compensation during PUCCH open loop power control, alphac(j) At 1, the SNR is-100- (-10-104) 14 dB.
When PUCCH open loop power control is not performed, the uplink path loss PL needs to be determined. Specifically, the uplink path loss PL can be determined by the following formula (4).
PL＝PTX-Preceive (4)
Wherein, PTXThe actual transmission Power of a single PRB in the terminal-side PUCCH may be specifically determined by a Power Headroom Report (PHR), as shown in formula (5).
Figure BDA0002370556110000071
Wherein, PCMAXFor the maximum transmission power, PL, of a single physical resource block PRB in the base station side PUCCH1minPHR (i) is the power headroom of the ith physical resource block PRB in the base station side PUCCH, PL, which is the minimum value of the downlink path loss1maxIs the maximum value of the downlink path loss.
In formula (5), PHR (i) < 0, corresponding to PTXNo longer decreases; PHR (i) > 0, corresponding to PTXMay vary; PHR (i) ═ 0, corresponding to PTXNo longer increased. When alpha isc＝0、αc＝0.8、αcWhen P is 0.7TXAnd downlink path loss PL1The corresponding relationship diagrams of (a) are respectively shown in fig. 3, 4 and 5. Wherein the abscissa is PL1In dB; ordinate is PTXIn dBm.
Then, step S22 is executed. And judging the size relation between the actual received power of the single PRB and the first threshold value and the size relation between the actual SNR of the single PRB and the second threshold value. The first threshold and the second threshold may be set to different values according to different application scenarios, for example, in the technical field of rail transit data transmission, the first threshold may be set to-75 dBm, and the second threshold may be set to 5 dB. And for values in other technical fields, the values can be the same as or different from the values, and are set according to actual needs.
As shown in table 1, the protocol 36.104 describes in table 7.3.1-1 that the dynamic range of the base station side receiver is from 1.4M to 20M, the average power of the desired signal corresponding to 1.4M is-76.3 dBm, the average power of the desired signal corresponding to 3M is-72.4 dBm, and the average powers of the desired signals corresponding to the remaining 5M, 10M, 15M, and 20M are-70.2 dBm, so that the first threshold value is selected to be-75 dBm, and thus the redundancy is 3 dB; other commonly used bandwidths than 1.4M rail traffic can be protected. It should be noted that, if the number of PRBs in the PUCCH exceeds 25, the Reference Signal Receiving Power (RSRP) takes the average value of RSRPs of the preceding 25 PRBs.
TABLE 1 protocol 36.104 Wide area BS dynamic Range in TABLE 7.3.1-1
Figure BDA0002370556110000081
If the judgment result shows that the actual received power of a single PRB in the PUCCH at the base station side is greater than the first threshold and the actual SNR is less than the second threshold, the actual received power and the SNR of the single PRB in the PUCCH at the base station side are unreasonable, the actual received power of the single PRB in the PUCCH at the base station side is too large and the SNR is too small, and the control of the transmission power of the PUCCH cannot be realized through a conventional scheme. Therefore, in the embodiment of the invention, a Transmit Power Control (TPC) command word with a value of 0 or 1 is directly generated, and then the expected Transmit Power of a single PRB in a PUCCH at the terminal side is controlled according to the TPC command word. It should be noted here that, when the actual received power is greater than the first threshold and the actual SNR is smaller than the second threshold, the TPC command word is fixed to take a value of 0 or 1, and then the corresponding compensation power, that is, the deviation between the expected transmit power and the actual power of a single PRB in the terminal-side PUCCH, may be determined according to the value of the TPC command word. The TPC command words have a correspondence relationship with the compensation powers, each TPC command word corresponding to one compensation power. And then controlling the expected transmission power of the single PRB in the terminal side PUCCH according to the compensation power, specifically, controlling the expected transmission power of the single PRB in the terminal side PUCCH to be the sum of the actual received power and the compensation power of the single PRB in the PUCCH.
The PUCCH transmission power control method provided by the embodiment of the invention comprises the steps of firstly determining the actual receiving power of a single physical resource block PRB in a PUCCH at a base station side and the actual signal-to-noise ratio SNR of the single PRB; and then if the actual received power is judged and known to be larger than the first threshold and the actual SNR is smaller than the second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word. When the transmission power of the PUCCH is controlled, the actual receiving power and SNR of a single PRB in the PUCCH at the base station side are limited, namely the maximum value of the actual receiving power and the minimum value of the SNR of the single PRB are limited, so that the effective demodulation of the PUCCH can be realized, the phenomenon that the transmission power of the PUCCH overflows due to the fact that a receiver at the base station side exceeds a power threshold can be prevented, the omission of the PUCCH is avoided, and the NOBACK problem is optimized.
On the basis of the foregoing embodiment, the PUCCH transmission power control method provided in the embodiment of the present invention further includes:
if the actual received power is judged to be less than or equal to the first threshold or the actual SNR is greater than or equal to the second threshold, judging whether the difference value between the actual SNR and the target SINR is 0, and if the difference value between the actual SNR and the target SINR is 0, controlling the expected transmitted power of a single PRB in the terminal side PUCCH to be the actual received power.
Specifically, in the embodiment of the present invention, when the result of the determination is that the actual received power of a single PRB in the base station side PUCCH is less than or equal to the first threshold or the actual SNR is greater than or equal to the second threshold, it is indicated that the actual received power or SNR of the single PRB in the base station side PUCCH has a reasonable value, and the PUCCH transmission power may be controlled by using a conventional scheme. Firstly, whether the difference between the actual SNR of the single PRB in the PUCCH at the base station side and the target SINR is 0 is judged, if the difference is 0, the expected transmitting power of the single PRB in the PUCCH at the terminal side is considered to be equal to the actual receiving power of the single PRB at the base station side, and therefore the expected transmitting power of the single PRB in the PUCCH at the terminal side is directly controlled to be the actual receiving power of the single PRB.
It should be noted that a specific value of the target SINR may be set according to specific requirements of different application scenarios, for example, for the technical field of rail transit data transmission, the value of the target SINR may be 7 dB.
On the basis of the foregoing embodiment, the PUCCH transmission power control method provided in the embodiment of the present invention further includes:
and if the difference value between the actual SNR and the target SINR is not 0, generating a TPC command word according to the difference value, and controlling the expected transmitting power of a single PRB in the terminal side PUCCH to be the sum of the actual receiving power and the difference value.
Specifically, in the PUCCH transmission power control method provided in the embodiment of the present invention, if the difference between the actual SNR of the actual received power of the single PRB on the base station side and the target SINR is not 0, it is considered that the expected transmitted power of the single PRB on the terminal side is not equal to the actual received power of the single PRB on the base station side, and therefore, the expected transmitted power of the single PRB on the terminal side needs to be controlled according to the difference between the actual SNR and the target SINR. Firstly, generating a TPC command word according to the difference value between the actual SNR and the target SINR, and then controlling the expected transmission power of a single PRB in a PUCCH at the terminal side to be the sum of the actual receiving power of the single PRB at the base station side and the difference value between the actual SNR and the target SINR according to the TPC command word.
On the basis of the above embodiment, in the PUCCH transmission power control method provided in the embodiment of the present invention, when the value of the TPC command word is 0, the compensation power is-1 dB; when the value of the TPC command word is1 in a scene of a downlink control information DCI format 1A/2A/3, the compensation power is 0; and when the value of the TPC command word in a scene of a downlink control information DCI format 3A is1, the compensation power is 1.
Specifically, in the embodiment of the present invention, the TPC command word has different values in different Downlink Control Information (DCI) formats, and the corresponding compensation power δ isPUCCHAnd are also different. When the value of the TPC command word is 0 in the scene of downlink control information DCI format 1A/2A/3, the compensation power is-1 dB, when the value is1, the compensation power is 0dB, when the value is 2, the compensation power is 1dB, and when the value is 3, the compensation power is 3 dB; when the value of the TPC command word in the scene of the downlink control information DCI format 3A is 0, the compensation power is-1 dB, and when the value is1, the compensation power is1 dB. Specifically, the results are shown in tables 2 and 3.
TABLE 2 corresponding compensatory power for TPC command word under DCI Format 1A/2A/3
Evaluation of TPC command word under DCI format 1A/2A/3 δPUCCH[dB]
0 -1
1 0
2 1
3 3
Table 3 compensation power for TPC command word under DCI format 3A
Evaluation of TPC command words in DCI format 3A δPUCCH[dB]
0 -1
1 1
On the basis of the above embodiments, in the PUCCH transmission power control method provided in the embodiments of the present invention, the actual SNR is determined based on the expected transmission power of a single PRB in the terminal-side PUCCH and the uplink path loss.
In particular, when determining the actual SNR of a single PRB, it may be specifically determined according to the expected transmission power P of a single PRB in the terminal-side PUCCH0_PUCCHAnd an uplink path loss PL determined by the above formula (2).
As shown in fig. 6, a complete flow diagram of a PUCCH transmission power control method provided in the embodiment of the present invention is shown. Firstly, determining the actual receiving power of a single physical resource block PRB in a PUCCH at a base station side and the actual signal-to-noise ratio SNR of the single PRB; then judging whether the actual received power is greater than a first threshold value and whether the actual SNR is less than a second threshold value; if yes, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and then controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word; if not, further judging whether the difference value between the actual SNR and the target SINR is 0, if so, controlling the expected transmitting power of a single PRB in the terminal side PUCCH to be the actual receiving power; and if the difference is not 0, generating a TPC command word according to the difference, and controlling the expected transmission power of a single PRB in a terminal side PUCCH to be the sum of the actual receiving power and the difference.
In the technical field of rail transit data transmission, one main body of data transmission is a Passenger Information System (PIS). The PIS is a multimedia integrated information system which depends on a multimedia network technology, takes a computer system as a core and enables passengers to timely and accurately know train operation information and public media information by arranging a station hall, a platform, an entrance and an exit and a display train carrier of a train; the required Downlink data transmission bandwidth is 2Mbps to 8Mbps, the corresponding Downlink bearer Physical Channel is a Physical Downlink Shared Channel (PDSCH), and the Downlink data transmission quality and capacity are closely related to ACK and NACK carried by a feedback Channel PUCCH of the PDSCH, so that the improvement of the over-detection rate of PUCCH in uplink detection is to improve the transmission of services such as Downlink PIS.
In the laboratory test line of Qingdao R3 rail transit, a transmission format TM3 is used, the scheduling formats of the transmission format are DCI formats 1A and 2A, and the related specific field explanation is shown in a Long Term Evolution (LTE) protocol 36.212.
A DCI 1A: TM3, which is a diversity Scheduling (SFBC) power control key field;
pucch (TPC) Power, which is represented by 2 bits in the scheduling field, which represents TPC;
TM3, which is a dual stream multiplexing scheduling (Large delay CDD) power control critical field.
Under the condition of actual transmission of downlink data in rail transit, when uplink reception of a power value of a PUCCH reaches-45 dBm of actual reception power of a single PRB, many PUCCHs are missed, PDSCH feeds back NOBACK, and large-area retransmission of File Transfer Protocol (FTP) data service is caused, so that downlink resources for transmitting PIS initial transmission are seized, the transmission rate of the downlink PIS service of a 10M cell is only hundreds of kbps, television playing on a subway train is influenced, the phenomena of jamming and mosaic are formed, and the playing is completely interrupted in severe cases. Meanwhile, when multiple users contend for the network, many new users accessing the network also fail to apply for downlink resources by using the SR on the PUCCH because the base station has too high background noise, resulting in failure of random access of the terminal.
The transmission rate of downlink PIS service of the rail transit under a 10M bandwidth is 4Mbps, when PUCCH is set according to conventional power, the MAC layer schedules a flow chart according to the downlink PIS service and default data service, the downlink PIS service is primarily transmitted for 1 time, the FTP data service is retransmitted for 4 times, and when the FTP data service is retransmitted, the primary transmission resource of the downlink PIS service can be preempted according to an HARQ mechanism.
As shown in fig. 7, first, it is determined that a QoS Class Identifier (QCI) of the PIS service is QCI 6, and a QCI of the FTP data service is QCI 9; then, the MAC layer judges whether the service is initially transmitted or not according to QCI priority scheduling; if the transmission is initial transmission, the MAC layer schedules the PIS service with QCI 6 according to the QCI priority, and the rest resources are allocated to the FIP data service; if the service is not initially transmitted, the retransmission resource part is scheduled preferentially according to the transmission criterion of the HARQ, and the FTP data service has three retransmission service types of 1, 2 and 3, so that the downlink transmission bandwidth of the initially transmitted PIS service is occupied. And then judging whether the total service rate of the standard cell for the LTE-M PIS service is more than or equal to 4Mbps, if so, meeting the requirement, wherein the downlink PIS service is smooth, and the video service is not blocked. And if the data transmission rate is less than 4Mbps, the PDSCH is preempted by retransmission services, the PIS services are less than 1Mbps, and the actual SNR of the PUCCH is less than 5dB or even 1 dB.
Aiming at the technical problems in the process of transmitting rail transit data, the embodiment of the invention provides a rail transit data transmission method. As shown in fig. 8, on the basis of the above embodiment, the rail transit data transmission method provided in the embodiment of the present invention includes:
s81, determining a PUCCH, where the PUCCH performs transmission power control based on the PUCCH transmission power control method provided in the above embodiment;
and S82, transmitting the rail transit data based on the PUCCH.
Specifically, in the embodiment of the present invention, the PUCCH transmission power control method provided in the above embodiment is applied to the technical field of rail transit data transmission.
The downlink is in relatively good signal strength from minus 70dBm to minus 80dBm, the corresponding path loss for track traffic is minus 85dBm, the receiving end of the base station needs to monitor the uplink single PRB power, when the monitoring power limit reaches minus 75dBm and the SNR value is less than 5dB, the MAC layer needs to inform BB and FPGA to request that the uplink power of the terminal side cannot be increased, the MAC layer needs to send a TPC command word for reducing or not increasing the expected transmitting power of the PUCCH of the terminal side to the terminal side, and the expected transmitting power of the PUCCH of the terminal side is suppressed below minus 75 dBm.
After the PUCCH for controlling transmission power is transmitted by using the PUCCH transmission power control method provided in the foregoing embodiment, a specific flow of transmission of the downlink PIS service and the FTP data service of the rail transit is as shown in fig. 9, and first, it is determined that a quality of service Class Identifier (QCI) of the PIS service is QCI ═ 6, and a QCI of the FTP data service is QCI ═ 9; then, the MAC layer judges whether the service is initially transmitted or not according to QCI priority scheduling; if the transmission is initial transmission, the MAC layer schedules the PIS service with QCI 6 according to the QCI priority, and the rest resources are allocated to the FIP data service; if the service is not initially transmitted, the retransmission resource part is scheduled preferentially according to the transmission criterion of the HARQ, the FTP data service has 2 types of retransmission service, and the FIP data service only occupies a little downlink transmission bandwidth which only has the initially transmitted PIS service under the condition that the PUCCH transmission power control strategy exists. And then judging whether the total service rate of the standard cell for the LTE-M PIS service is more than or equal to 4Mbps, if so, meeting the requirement, wherein the downlink PIS service is smooth, the video service is not blocked, the service transmission requirement of the system is met, and the actual SNR of the PUCCH is more than 5 dB. If the number of the channels is less than 4Mbps, no PDSCH occupies downlink transmission resources, NOBACK feedback is formed, and video service is blocked.
The rail transit data transmission method provided by the embodiment of the invention comprises the following steps: determining a PUCCH, wherein the PUCCH performs transmission power control based on the PUCCH transmission power control method provided in the embodiment; and transmitting the rail transit data based on the PUCCH. When the channel uplink condition is good, the power of a PUCCH of a terminal downlink service is limited in amplitude, the main purpose is to prevent uplink mutual interference of the terminal, so that partial terminals of the PUCCH overflow to form a NOBACK phenomenon, downlink default data transmission data compete with the downlink PIS service, and therefore the transmission environment of the terminal downlink PIS service ensures that the total data transmission of the PIS service in a 10M cell reaches 4 Mbps. When the SNR of the PUCCH channel is kept to be more than 5dB all the time, the over-detection rate of SR modulation detection is increased, so that the application of other newly added data terminals to the default bearer service is improved, the downlink data transmission of more users is transmitted more excellently, and the random access success rate of the users is also improved; the method can prevent the situation that the video playing in the downlink of the PIS service channel is blocked due to the fact that retransmission is prior to the PIS service, and can improve the success rate of SR application resources carried by the PUCCH, so that the random access success rate of the terminal which initially enters the wireless environment is improved.
The invention uses the limited amplitude of PUCCH power, namely single PRB-75dBm, to effectively demodulate the PUCCH, thereby reducing the occurrence of large-area retransmission, preempting the transmission resource of the downlink PIS, improving the success rate of the default bearing once, and sharing the downlink transmission resource with the PIS1 retransmission. Meanwhile, the uplink SNR of the PUCCH can be improved, so that the channel of the PUCCH is greatly improved through a detection threshold.
In summary, the rail transit data transmission method provided in the embodiment of the present invention can improve the success rate of 1 retransmission of the PIS service, and the total transmission rate of the PIS service in a 10M cell reaches the requirement of 4Mbps specified by LTE-M, so that the televisions on the rail transit vehicles do not have jams and mosaics, and a high-quality sensory video transmission is provided for the passengers in the rail transit. Meanwhile, the actual SNR of the PUCCH is kept about 5dB of the expected signal-to-noise ratio, the one-time passing rate of the SR request of the terminal is greatly improved, and the random access success rate of a newly-accessed network user is greatly improved. The rail transit data transmission method has the advantages that downlink data transmission is better protected, and certain self-adaptive retransmission of HARQ of the rail transit data transmission method is limited; the downlink data throughput of the base station can be improved, the number of downlink PISs of the rail transit is increased, and the data transmission quality is improved, so that the total PIS transmission rate > of a 10M cell of the subway is 4 Mbps; the SR request receiving performance of the PUCCH of the base station can be optimized, the uplink resource application of a new user in an access system is greatly optimized, and the random access success rate of a newly-accessed terminal is improved; the utilization rate of the air interface downlink data resources can be improved, so that the effective transmission resources of the downlink PDSCH channel can be reasonably utilized by the PIS service and the downlink PDSCH service.
As shown in fig. 10, on the basis of the above embodiments, an embodiment of the present invention provides a PUCCH transmission power control system, including: a first determination module 101 and a control module 102. Wherein the content of the first and second substances,
the first determining module 101 is configured to determine an actual received power of a single physical resource block PRB in a base station side PUCCH and an actual signal-to-noise ratio SNR of the single PRB;
the control module 102 is configured to generate a transmit power control TPC command word whose value is 0 or 1 if it is determined that the actual received power is greater than a first threshold and the actual SNR is smaller than a second threshold, and control the expected transmit power of a single PRB in a PUCCH at a terminal side according to the TPC command word.
Specifically, the functions of the modules in the PUCCH transmission power control system provided in the embodiment of the present invention correspond to the operation flows of the steps in the PUCCH transmission power control method embodiment one to one, and the implementation effects are also consistent.
As shown in fig. 11, on the basis of the above embodiments, an embodiment of the present invention provides a rail transit data transmission system, including: a second determination module 111 and a transmission module 112.
The second determining module 111 is configured to determine a PUCCH, where the PUCCH performs transmission power control based on the PUCCH transmission power control method provided in the foregoing embodiment;
the transmission module 112 is configured to transmit the rail transit data based on the PUCCH.
Specifically, the functions of the modules in the rail transit data transmission system provided in the embodiment of the present invention correspond to the operation flows of the steps in the embodiment of the rail transit data transmission method one to one, and the implementation effects are also consistent.
As shown in fig. 12, on the basis of the above embodiment, an embodiment of the present invention provides an electronic device, including: a processor (processor)121, a memory (memory)122, a communication Interface (Communications Interface)123, and a communication bus 124; wherein the content of the first and second substances,
the processor 121, the memory 122 and the communication interface 123 are communicated with each other through a communication bus 124. The memory 122 stores program instructions executable by the processor 121, and the processor 121 is configured to call the program instructions in the memory 122 to perform the methods provided by the above-mentioned method embodiments, for example, including: determining the actual receiving power of a single Physical Resource Block (PRB) in a PUCCH (physical uplink control channel) at the base station side and the actual signal-to-noise ratio (SNR) of the single PRB; and if the actual received power is judged to be larger than a first threshold and the actual SNR is smaller than a second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word. Or comprises the following steps: the PUCCH for controlling the transmission power based on the PUCCH transmission power control method transmits the rail traffic data.
It should be noted that, when being implemented specifically, the electronic device in this embodiment may be a server, a PC, or another device, as long as the structure includes the processor 121, the communication interface 123, the memory 122, and the communication bus 124 shown in fig. 12, where the processor 121, the communication interface 123, and the memory 122 complete mutual communication through the communication bus 124, and the processor 121 may call a logic instruction in the memory 122 to execute the above method. The embodiment does not limit the specific implementation form of the electronic device.
The logic instructions in memory 122 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Further, embodiments of the present invention disclose a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, the computer is capable of performing the methods provided by the above-mentioned method embodiments, for example, comprising: determining the actual receiving power of a single Physical Resource Block (PRB) in a PUCCH (physical uplink control channel) at the base station side and the actual signal-to-noise ratio (SNR) of the single PRB; and if the actual received power is judged to be larger than a first threshold and the actual SNR is smaller than a second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word. Or comprises the following steps: the PUCCH for controlling the transmission power based on the PUCCH transmission power control method transmits the rail traffic data.
On the basis of the foregoing embodiments, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented to perform the transmission method provided by the foregoing embodiments when executed by a processor, and the method includes: determining the actual receiving power of a single Physical Resource Block (PRB) in a PUCCH (physical uplink control channel) at the base station side and the actual signal-to-noise ratio (SNR) of the single PRB; and if the actual received power is judged to be larger than a first threshold and the actual SNR is smaller than a second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word. Or comprises the following steps: the PUCCH for controlling the transmission power based on the PUCCH transmission power control method transmits the rail traffic data.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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 of the embodiments of the present invention.

Claims (10)

1. A PUCCH transmission power control method, comprising:
determining the actual receiving power of a single Physical Resource Block (PRB) in a PUCCH (physical uplink control channel) at the base station side and the actual signal-to-noise ratio (SNR) of the single PRB;
and if the actual received power is judged to be larger than a first threshold and the actual SNR is smaller than a second threshold, generating a Transmission Power Control (TPC) command word with the value of 0 or 1, and controlling the expected transmission power of a single PRB in a terminal side PUCCH according to the TPC command word.
2. The PUCCH transmission power control method according to claim 1, further comprising:
if the actual received power is judged to be less than or equal to the first threshold or the actual SNR is greater than or equal to the second threshold, judging whether the difference value between the actual SNR and the target SINR is 0, and if the difference value between the actual SNR and the target SINR is 0, controlling the expected transmitted power of a single PRB in the terminal side PUCCH to be the actual received power.
3. The PUCCH transmission power control method according to claim 2, further comprising:
and if the difference value between the actual SNR and the target SINR is not 0, generating a TPC command word according to the difference value, and controlling the expected transmitting power of a single PRB in the terminal side PUCCH to be the sum of the actual receiving power and the difference value.
4. The PUCCH transmission power control method according to claim 1, wherein the controlling the expected transmission power of a single PRB in a terminal-side PUCCH according to the TPC command word specifically includes:
determining corresponding compensation power according to the value of the TPC command word;
and controlling the expected transmission power of a single PRB in the terminal-side PUCCH based on the compensation power.
5. The PUCCH transmit power control method according to claim 4, wherein the backoff power is-1 dB when the TPC command word takes a value of 0; when the value of the TPC command word under the downlink control information DCI format 1A/2A/3 is1, the compensation power is 0; and when the value of the TPC command word under the downlink control information DCI format 3A is1, the compensation power is 1.
6. The PUCCH transmission power control method according to any of claims 1-5, wherein the first threshold is-75 dBm and the second threshold is 5 dB.
7. The PUCCH transmission power control method according to any of claims 1-5, wherein the actual signal-to-noise ratio (SNR) is determined based on an expected transmission power of a single PRB in a terminal-side PUCCH and an uplink path loss.
8. A rail transit data transmission method is characterized by comprising the following steps:
the PUCCH that performs transmission power control based on the PUCCH transmission power control method of any one of claims 1-7, transmits the track traffic data.
9. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor when executing the program implements the steps of the PUCCH transmission power control method according to any of claims 1-7 or the rail transit data transmission method according to claim 8.
10. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the steps of the PUCCH transmission power control method according to any one of claims 1-7 or the rail transit data transmission method according to claim 8.
CN202010049341.3A 2020-01-16 2020-01-16 PUCCH transmission power control method and rail transit data transmission method Withdrawn CN113141645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010049341.3A CN113141645A (en) 2020-01-16 2020-01-16 PUCCH transmission power control method and rail transit data transmission method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010049341.3A CN113141645A (en) 2020-01-16 2020-01-16 PUCCH transmission power control method and rail transit data transmission method

Publications (1)

Publication Number Publication Date
CN113141645A true CN113141645A (en) 2021-07-20

Family

ID=76808490

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010049341.3A Withdrawn CN113141645A (en) 2020-01-16 2020-01-16 PUCCH transmission power control method and rail transit data transmission method

Country Status (1)

Country Link
CN (1) CN113141645A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114364004A (en) * 2021-12-13 2022-04-15 北京佰才邦技术股份有限公司 Uplink power control method and device and electronic equipment
CN117135735A (en) * 2023-01-13 2023-11-28 荣耀终端有限公司 Method and device for controlling transmission power of Physical Uplink Control Channel (PUCCH) and user terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103875291A (en) * 2011-05-03 2014-06-18 美国博通公司 Uplink transmission power control mechanism
CN106060918A (en) * 2016-06-08 2016-10-26 上海华为技术有限公司 Power control method and base station
US20170289921A1 (en) * 2016-04-01 2017-10-05 Electronics And Telecommunications Research Institute Method and apparatus for controlling uplink transmission power
CN108243490A (en) * 2016-12-26 2018-07-03 大唐移动通信设备有限公司 A kind of method and device for reducing uplink interference

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103875291A (en) * 2011-05-03 2014-06-18 美国博通公司 Uplink transmission power control mechanism
US20170289921A1 (en) * 2016-04-01 2017-10-05 Electronics And Telecommunications Research Institute Method and apparatus for controlling uplink transmission power
CN106060918A (en) * 2016-06-08 2016-10-26 上海华为技术有限公司 Power control method and base station
CN108243490A (en) * 2016-12-26 2018-07-03 大唐移动通信设备有限公司 A kind of method and device for reducing uplink interference

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114364004A (en) * 2021-12-13 2022-04-15 北京佰才邦技术股份有限公司 Uplink power control method and device and electronic equipment
CN117135735A (en) * 2023-01-13 2023-11-28 荣耀终端有限公司 Method and device for controlling transmission power of Physical Uplink Control Channel (PUCCH) and user terminal

Similar Documents

Publication Publication Date Title
US8325683B2 (en) Communication device
JP5911829B2 (en) Allocation of femto cell control resources to prevent interference with macro cells
RU2366088C2 (en) Method and device to indicate maximum user transmitter power for base station for dispatching of packet uplink transmission in cellular network
US8447344B2 (en) Uplink power control for channel aggregation in a communication network
EP4096138B1 (en) Data transmission method and apparatus
JP5101488B2 (en) Base station apparatus and radio resource management method using the same
US8248976B2 (en) Power control and scheduling method in consideration of interference levels between neighbor sectors in communication system
US10123233B2 (en) Base station apparatus and communication system
US10772049B2 (en) Method for terminal for reporting power headroom in wireless communication system, and terminal utilizing method
US10212736B2 (en) Apparatus and method for controlling channel access adaptively in wireless communication system
CN101132631A (en) Method and base station for allocating system resource according to user service quality
JP2000091985A (en) Power control method for communication system
US9572170B2 (en) Method and device for applying adaptive link in communication system
JP2019504580A (en) Method and apparatus for determining channel detection threshold in uplink channel access
KR101593238B1 (en) Apparatus and method for controlling transmission power in wireless communication system
CN113141645A (en) PUCCH transmission power control method and rail transit data transmission method
US20150358921A1 (en) Fast Fading Power Restriction
EP2770658A1 (en) Method and system for sending control signaling
WO2018038933A1 (en) Systems and methods for decoupling control and data channels in wireless networks
EP1855390A1 (en) Methods and devices for interference tolerance signalling and power control using busy-signal concept
EP1855423B1 (en) Decentralized multi-user link adaptation for QoS support
TWI405423B (en) Best-effort macro diversity
WO2014187337A1 (en) Method and base station for adjusting channel quality indicator
US8185126B2 (en) Communication control method, radio base station, and radio control station
JP4674223B2 (en) Broadcast signaling using receiver feedback and busy burst

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20210720