CN109889997B - Automatic power control method for realizing individual calling of DMR (digital Mobile radio) or PDT (digital light-powered cordless telephone) interphone - Google Patents
Automatic power control method for realizing individual calling of DMR (digital Mobile radio) or PDT (digital light-powered cordless telephone) interphone Download PDFInfo
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- CN109889997B CN109889997B CN201910345798.6A CN201910345798A CN109889997B CN 109889997 B CN109889997 B CN 109889997B CN 201910345798 A CN201910345798 A CN 201910345798A CN 109889997 B CN109889997 B CN 109889997B
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Abstract
The invention provides a power automatic control method for realizing individual calling of a DMR (digital Mobile radio) or PDT (digital data processing) interphone, wherein the individual calling of the interphone is a primary calling party, and then a calling party transmits a signal by using the maximum power and transmits a transmitting power value to a called party by an embedded signaling; the called party receiving the call calculates the channel loss and the reserved allowance according to the received signal strength and the transmitting power of the calling party; the called party calculates the transmitting power Tr used for replying the call, puts the transmitting power Tr into the embedded signaling and replies the call by using the transmitting power Tr, and the calling party replies again and calculates the power according to the mode; and clearing the parameters of the buffer ID, the RSSI and the Tr when the call is kept to be finished. The method of the invention can realize dynamic adjustment of the power of far and near distances, realize the optimal matching of the call distance and the power, and reduce the consumption of electric quantity and unnecessary electromagnetic radiation while ensuring the good call of each calling call so as to prolong the working time of the interphone.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a power automatic control method for realizing individual calling of a DMR (digital Mobile radio) or PDT (digital light-powered) interphone.
Background
The conventional digital interphone (DMR/PDT/DPMR) at present only has high, middle and low three-gear power switching to realize different call distance requirements, but cannot realize the optimal matching of the call distance and the power by dynamically adjusting the power at far and near distances. This accelerates the consumption of battery power and causes unnecessary electromagnetic interference.
Disclosure of Invention
In order to solve the above-mentioned deficiencies of the prior art, the present invention aims to provide an automatic power control method for implementing individual call of a DMR or PDT interphone, so as to overcome the deficiencies in the prior art.
In order to achieve the above object, the present invention provides an automatic power control method for realizing individual call of a DMR or PDT interphone, comprising the following steps: step S1): the interphone initiates a call; step S2): judging individual call of interphoneWhether the call is a first calling; step S3): if the current calling call of the interphone is the first calling party, the interphone is used as a calling party to transmit a signal with the maximum power and transmit a transmission power value to a called party through an embedded signaling; step S4): finishing the transmission of the interphone; step S5): judging whether the interphone initiates the calling again; step S6): if the interphone does not initiate the calling again, judging whether the interphone receives the calling; step S7): if the interphone receives a calling call, the interphone is used as a called party to calculate the channel loss and the reserved allowance according to the received signal intensity and the transmitting power of a calling party; wherein, the channel loss is RXRSI-TXLAVUE; RXRSI is the received signal strength, and the unit is dBm; TXLAVUE is the transmitting power of a calling party and the unit is dBm; reserving allowance as a variable parameter, and setting the parameter through software according to the actual use environment; step S8): interphone used as called party to calculate transmission power T used for replying callr(ii) a Wherein the transmission power TrSensitivity + reserved margin + channel loss; the sensitivity is the receiving sensitivity of the local machine and is the parameter of the interphone when leaving factory; reserving allowance as a variable parameter, and setting the parameter through software according to the actual use environment; step S9): the interphone is used as the called party to transmit the power TrPutting embedded signaling and replying a call by using the transmission power Tr; (ii) a Wherein, the interphone is used as the calling party to reply again, and the power is calculated in the modes of the step S7), the step S8) and the step S9); step S10): the interphone is in standby; step S11): judging whether the call of the interphone is ended or not; step S12): if the interphone call is ended, clearing the ID, RXRRSSI and T of the calling partyrAnd (4) parameters.
Here, the reserved margin is a subjective parameter, and a system debugger performs on-site test verification to obtain an optimal evaluation value (generally between 3dB and 10 dB). For example: in rural areas and plains, the speed can be 3dB under static or walking speed; mountainous, urban or high speed movement typically sets 10 dB.
As a further description of the power automatic control method according to the present invention, preferably, the embedded signaling is embedded signaling of F frames in each superframe. In the DMR/PDT protocol, a TDMA mode is adopted for communication. Each superframe contains six bursts of ABCDEF, with the middle 48 bits of each burst being embedded signaling. In a pager voice communication, the embedded signaling of F frames is not used. Therefore, the F frame embedded signaling in each superframe is used for transmitting the transmission power level to the called party.
As a further description of the power automatic control method according to the present invention, preferably, in step S2), the determining whether the individual call of the intercom is the first call further includes the following steps: if the current calling of the interphone is not the first calling, the interphone calculates the channel loss and the reserved allowance.
As a further description of the power automatic control method according to the present invention, preferably, in step S5), the determining whether the intercom originates the caller again further includes the following steps: if the interphone initiates the calling again, whether the interphone initiates the calling again is the first calling is judged.
As a further description of the power automatic control method according to the present invention, in step S6), it is preferable that the determining whether the intercom receives an individual call further includes: and if the interphone does not receive the calling call, the interphone is in standby.
As a further description of the power automatic control method according to the present invention, in step S11), the method for determining whether or not the intercom has ended the call holding further includes: if the interphone does not finish the call holding, the interphone waits.
The invention has the beneficial effects that:
the method of the invention can realize dynamic adjustment of the power of far and near distances, realize the optimal matching of the call distance and the power, and reduce the consumption of electric quantity and unnecessary electromagnetic radiation while ensuring the good call of each calling call so as to prolong the working time of the interphone.
Drawings
Fig. 1 is a flow chart of a method for automatically controlling the power of individual calls of a DMR or PDT interphone according to the present invention.
Detailed Description
To further understand the structure, characteristics and other objects of the present invention, the following detailed description is given with reference to the accompanying preferred embodiments, which are only used to illustrate the technical solutions of the present invention and are not to limit the present invention.
As shown in fig. 1, fig. 1 is a flow chart of a method for automatically controlling the power of a DMR or PDT interphone individual call according to the present invention; the power automatic control method comprises the following steps:
step S1): the intercom initiates an individual call.
Step S2): and judging whether the individual call of the interphone is the first calling.
Step S3): if the current calling call of the interphone is the first calling, the interphone is used as a calling party to transmit a signal with the maximum power and transmit a transmission power value to a called party through embedded signaling. If the current calling of the interphone is not the first calling, the interphone calculates the channel loss and the reserved allowance. Wherein, the channel loss is RXRSI-TXLAVUE.
Step S4): and finishing the transmission of the interphone.
Step S5): and judging whether the interphone initiates the calling again.
Step S6): if the interphone does not initiate the calling again, judging whether the interphone receives the calling; if the interphone initiates the calling again, whether the interphone initiates the calling again is the first calling is judged.
Step S7): if the interphone receives a calling call, the interphone is used as a called party to calculate the channel loss and the reserved allowance according to the received signal intensity and the transmitting power of a calling party; and if the interphone does not receive the calling call, the interphone is in standby.
Wherein, the channel loss is RXRSI-TXLAVUE; RXRSI is the received signal strength, and the unit is dBm; TXLAVUE is the transmitting power of a calling party and the unit is dBm; the reserved margin is a variable parameter, which is set by software according to the actual use environment (realized by writing), and the empirical value of the reserved channel asymmetry and the fading quantity is 10dB, but the invention is not limited to the value. The reserved margin is a variable parameter, the parameter is set through software according to the actual use environment, and the optimal evaluation value is generally 3-10 dB. For example: in rural areas and plains, the speed can be 3dB under static or walking speed; mountainous, urban or high speed movement typically sets 10 dB.
Step S8): interphone used as called party to calculate transmission power T used for replying callr。
Wherein the transmission power TrSensitivity + reserved margin + channel loss; the sensitivity is the local receiving sensitivity, is the parameter of the interphone leaving the factory, and has a certain unit in the actual product, such as: -120 to-123 dBm; the reserved margin is a variable parameter, the parameter is set through software according to the actual use environment, and the optimal evaluation value is generally 3-10 dB. For example: in rural areas and plains, the speed can be 3dB under static or walking speed; mountainous, urban or high speed movement typically sets 10 dB.
Step S9): the interphone is used as the called party to transmit the power TrPutting embedded signaling and replying a call by using the transmission power Tr; wherein, the interphone is used as the calling party to reply again, and the power is calculated according to the steps S7), S8) and S9).
Step S10): and the interphone is in standby.
Step S11): the interphone judges whether the call is ended or not.
Step S12): if the interphone call is ended, clearing the ID, RXRRSSI and T of the calling partyrA parameter; if the interphone does not finish the call holding, the interphone waits.
In the DMR/PDT protocol, a TDMA scheme is used for communication. Each superframe contains six bursts of ABCDEF, with the middle 48 bits of each burst being embedded signaling. In a pager voice communication, the embedded signaling of F frames is not used. Therefore, the F frame embedded signaling in each superframe is used for transmitting the transmission power level to the called party.
The called party calculates the channel loss and the reserved margin (the empirical value of the asymmetry and the fading quantity of the reserved channel is 10dB, but not limited to the value) according to the RSSI value of the received signal (namely the average RSSI value of the current call) and the transmission power level of the calling party, predicts and calculates the power value required to be used for replying the current call and transmits the power value according to the power value (meanwhile, the transmission power value is sent out through an embedded signaling), so that the electricity consumption and the unnecessary electromagnetic radiation are reduced while the good call is ensured. The invention is only suitable for the relative symmetry of the channels, namely the approximate loss of the receiving and transmitting channels, and is effective for the same pair of ID aiming at each calling, if any one of the two parties of each calling changes, the flow is restarted.
In the conventional DMR/PDT communication mode, even if two devices are close to each other, communication needs to be performed at a preset power (the preset power is generally high to ensure the maximum communication distance), which wastes the battery power and causes unnecessary electromagnetic radiation. When the interphone initiates a calling call for the first time, the interphone uses the highest power and transmits the power value to a called party through an embedded signaling; when the called party replies the call, the channel loss is calculated according to the transmitting power of the calling party and the RSSI received by the local machine, and the reasonable transmitting power is calculated and used for communication, so that the best power can be adopted for transmitting at various distances, good communication can be satisfied, the over-high power is not used, the battery endurance time is ensured, and unnecessary electromagnetic radiation is reduced.
It should be noted that the above summary and the detailed description are intended to demonstrate the practical application of the technical solutions provided by the present invention, and should not be construed as limiting the scope of the present invention. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the invention. The scope of the invention is to be determined by the appended claims.
Claims (6)
1. A power automatic control method for realizing individual calling of a DMR or PDT interphone is characterized by comprising the following steps:
step S1): the interphone initiates a call;
step S2): judging whether the individual call of the interphone is a first calling;
step S3): if the current calling call of the interphone is the first calling, the interphone is used as a calling party to transmit a signal by using the maximum power and transmit the power value to a called party through embedded signaling;
step S4): finishing the transmission of the interphone;
step S5): judging whether the interphone initiates the calling again;
step S6): if the interphone does not initiate the calling again, judging whether the interphone receives the calling;
step S7): if the interphone receives a calling call, the interphone is used as a called party to calculate the channel loss and the reserved allowance according to the received signal intensity and the transmitting power of a calling party;
wherein, the channel loss is RXRSI-TXLAVUE; RXRSI is the received signal strength, and the unit is dBm; TXLAVUE is the transmitting power of a calling party and the unit is dBm; reserving allowance as a variable parameter, and setting the parameter through software according to the actual use environment;
step S8): interphone used as called party to calculate transmission power T used for replying callr；
Wherein the transmission power TrSensitivity + reserved margin + channel loss; the sensitivity is the receiving sensitivity of the local machine and is the parameter of the interphone when leaving factory; reserving allowance as a variable parameter, and setting the parameter through software according to the actual use environment;
step S9): the interphone is used as the called party to transmit the power TrPutting embedded signaling and replying a call by using the transmission power Tr;
step S10): the interphone is in standby;
step S11): judging whether the call of the interphone is ended or not;
step S12): if the interphone call is ended, clearing the ID, RXRRSSI and T of the calling partyrAnd (4) parameters.
2. The power automatic control method of claim 1, wherein the embedded signaling is embedded signaling of F-frames in each superframe.
3. The method according to claim 1, wherein in step S2), the determining whether the individual call of the intercom is the first call further comprises the following steps: if the current calling of the interphone is not the first calling, the interphone calculates the channel loss and the reserved allowance.
4. The power automatic control method according to claim 1, wherein in step S5), the determining whether the intercom initiates the caller again further comprises the steps of: if the interphone initiates the calling again, whether the interphone initiates the calling again is the first calling is judged.
5. The power automatic control method according to claim 1, wherein in step S6), the determining whether the intercom receives an individual call further comprises the steps of: and if the interphone does not receive the calling call, the interphone is in standby.
6. The power automatic control method according to claim 1, wherein in step S11), the determining whether the intercom call is ended further comprises the steps of: if the interphone does not finish the call holding, the interphone waits.
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| CN109526046B (en) * | 2019-01-07 | 2021-10-29 | 福建科立讯通信有限公司 | Digital interphone transmitting power optimization adjustment system and method |
| CN112188603B (en) * | 2019-07-05 | 2023-07-18 | 北京小米移动软件有限公司 | Power control method, device and storage medium |
| CN111372285B (en) * | 2020-05-27 | 2020-09-22 | 北京中兴高达通信技术有限公司 | Frame sending method and device and frame receiving method and device |
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| US20030153341A1 (en) * | 2002-02-14 | 2003-08-14 | Crockett Douglas M. | Server for initiating a group call in a group communication network |
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