CN102946304B - The time division duplex transmission method of digital handset - Google Patents
The time division duplex transmission method of digital handset Download PDFInfo
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- CN102946304B CN102946304B CN201210382320.9A CN201210382320A CN102946304B CN 102946304 B CN102946304 B CN 102946304B CN 201210382320 A CN201210382320 A CN 201210382320A CN 102946304 B CN102946304 B CN 102946304B
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Abstract
The invention discloses a kind of time division duplex transmission method of digital handset, be that base unit transmits with burst frame, comprise the following steps: the sending time slots 1) entering burst frame, in sending time slots, host side sends voice or data to called end, simultaneously the voice that send at Receiving Host end of called end or data; 2) enter the protection time slot of burst frame, in protection time slot, the transmission state of host side switches to accepting state, and the accepting state of called end switches to transmission state simultaneously; 3) enter the receiving slot of burst frame, in receiving slot, called end sends voice or data to host side, and host side receives voice or the data of called end simultaneously; 4) sending time slots, protection time slot and receiving slot form a Burst Period, and after completing a Burst Period, next burst frame starts transmission, returns step 1), until all voice data transmission is complete.The present invention can complete two-way communication in synchronization, makes double-talk more smooth.
Description
Technical field
The present invention relates to a kind of method for communication transmission, especially a kind of is the time division duplex transmission method of digital handset.Belong to wireless communication technology field.
Background technology
TDD mode (TDD:TimeDivisionDuplexing) is one of main flow mode of operation of 3-G (Generation Three mobile communication system), is the duplex mode of communication system, in mobile communication system for separating of reception and transfer channel (or uplink downlink).In the mobile communication system of TDD mode, reception and transmission are the different time-gaps at same frequency channels and carrier wave, are separated reception and transfer channel with guard time.In the mobile communication system of tdd mode, the same frequency of up-downgoing channel, thus has the reciprocity of up-downgoing channel, and this brings many advantages to the mobile communication system of tdd mode.
At present, in the field of wireless communication, the application of time division duplex is more and more extensive, but in digital handset field, the most frequently used air-interface standard has the consensus standards such as DMR, DPMR, PPT, and in full-duplex communication, they all only contains only the transmission thought of Frequency Division Duplexing (FDD).The voice superframes transmission thought adopted according to them, realizing the switching sent with receiving needs 10ms even more, therefore, can not completing the switching completely sent with receiving, can not realize the transmission of time division duplex in guard time.
Summary of the invention
Object of the present invention is the defect in order to solve above-mentioned prior art, provides a kind of time division duplex transmission method that can realize sending the digital handset switched with reception in protection time slot.
Object of the present invention can reach by taking following technical scheme:
The time division duplex transmission method of digital handset, is characterized in that: described method is that base unit transmits with burst frame, comprises the following steps:
1) enter the sending time slots of burst frame, in sending time slots, host side sends voice or data to called end, simultaneously the voice that send at Receiving Host end of called end or data;
2) enter the protection time slot of burst frame, in protection time slot, the transmission state of host side switches to accepting state, and the accepting state of called end switches to transmission state simultaneously;
3) enter the receiving slot of burst frame, in receiving slot, called end sends voice or data to host side, and host side receives voice or the data of called end simultaneously;
4) sending time slots, protection time slot and receiving slot form a Burst Period, and after completing a Burst Period, next burst frame starts transmission, returns step 1), until all voice data transmission is complete.
As a kind of preferred version, in step 2) described in protection time slot in, it is, by microprocessor, rf chip is set to transmission state and accepting state in turn that the state of host side and called end switches.
As a kind of preferred version, the transmission of described host side or called end is carried out with the different time-gap being received in same frequency channels.
As a kind of preferred version, in the payload district of each described burst frame, insert a frame alignment word FS, often transmit a burst frame and set up a frame synchronization.
As a kind of preferred version, a channel associated signalling territory CCF is respectively set on the both sides of described frame alignment word FS.
As a kind of preferred version, payload region is divided into two symmetrical regions by described frame alignment word FS and two channel associated signalling territory CCF.
As a kind of preferred version, described protection time slot is divided into two sections, is separately positioned on each payload district.
As a kind of preferred version, described frame alignment word FS takies 48 bits, and duration is 5ms; Each channel associated signalling territory CCF takies 12 bits, takies 24 bits altogether, and duration is 2.5ms; Each payload region takies 144 bits, takies 288 bits altogether, and duration is 30ms; Protection time slot every section takies 12 bits, and take 24 bits altogether, duration is 2.5ms; Whole burst frame takies 384 bits altogether, and its total duration is 40ms.
As a kind of preferred version, in the protection time slot of arbitrary section of 1.25ms, carry out sending/receiving switch.
The present invention has following beneficial effect relative to prior art:
1, the present invention makes the host side of digital handset and called end can complete two-way communication in synchronization, wherein a side sends data, the opposing party must in reception data, and insert a frame alignment word in each burst frame transmitted, can be good at preventing the state of OOF from occurring, achieve the time division duplex transmission of digital handset, make double-talk more smooth.
2, the present invention makes digital handset work in the different time-gap of same frequency channels, is separated and receives and launch channel, do not need paired frequency, can use various frequency resource, have higher frequency utilization flexibility with protection time slot.
3, the present invention is in the 1.25ms of protection time slot; by microprocessor, rf chip is set to transmission state and accepting state in turn; realize sending and the correct switching received; message transmission rate due to rf chip is several times of vocoder transmission rate; therefore, can all send or receive whole speech datas of a Burst Period in a sending time slots or receiving slot.
Accompanying drawing explanation
Fig. 1 is time division duplex transmission schematic diagram of the present invention.
Fig. 2 is burst frame structural representation of the present invention.
Embodiment
Embodiment 1:
As shown in Figure 1, the time division duplex transmission method of the present embodiment is that base unit transmits with burst frame, comprises the following steps:
1) enter the sending time slots Slot1 of burst frame, in sending time slots Slot1, host side sends voice or data to called end, simultaneously the voice that send at Receiving Host end of called end or data;
2) enter the protection time slot G of burst frame, in protection time slot G, the transmission state of host side switches to accepting state, and the accepting state of called end switches to transmission state simultaneously;
3) enter the receiving slot Slot2 of burst frame, in receiving slot Slot2, called end sends voice or data to host side, and host side receives voice or the data of called end simultaneously;
4) sending time slots Slot1, protection time slot G and receiving slot Slot2 form a Burst Period, and after completing a Burst Period, next burst frame starts transmission, returns step 1), until all voice data transmission is complete.
In step 2) described in protection time slot in, it is, by microprocessor, rf chip is set to transmission state and accepting state in turn that the state of host side and called end switches.The transmission of host side or called end is carried out with the different time-gap being received in same frequency channels.
As shown in Figure 2, in the payload district of each burst frame, insert a frame alignment word FS, often transmit a burst frame and set up a frame synchronization, take 48 bits, duration is 5ms; Respectively arrange a channel associated signalling territory CCF on the both sides of described frame alignment word FS, each channel associated signalling territory CCF takies 12 bits, takies 24 bits altogether, and duration is 2.5ms; Payload region is divided into two symmetrical regions by described frame alignment word FS and two channel associated signalling territory CCF, and each payload region takies 144 bits, takies 288 bits altogether, and duration is 30ms; Step 2) described in protection time slot be divided into two sections, be separately positioned on each payload district, every section takies 12 bits, takies 24 bits altogether, and duration is 2.5ms, in 1.25ms, wherein to carry out sending/receiving switch; Whole burst frame takies 384 bits altogether, and its total duration is 40ms.
The above; be only the preferred embodiment of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in scope disclosed in this invention; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all belonged to protection scope of the present invention.
Claims (2)
1. the time division duplex transmission method of digital handset, is characterized in that: described method is that base unit transmits with burst frame, comprises the following steps:
1) enter the sending time slots of burst frame, in sending time slots, host side sends voice or data to called end, simultaneously the voice that send at Receiving Host end of called end or data;
2) enter the protection time slot of burst frame, in protection time slot, the transmission state of host side switches to accepting state, and the accepting state of called end switches to transmission state simultaneously; It is, by microprocessor, rf chip is set to transmission state and accepting state in turn that the state of host side and called end switches;
3) enter the receiving slot of burst frame, in receiving slot, called end sends voice or data to host side, and host side receives voice or the data of called end simultaneously;
4) sending time slots, protection time slot and receiving slot form a Burst Period, and after completing a Burst Period, next burst frame starts transmission, returns step 1), until all voice data transmission is complete;
In the payload district of each described burst frame, insert a frame alignment word FS, often transmit a burst frame and set up a frame synchronization; A channel associated signalling territory CCF is respectively set on the both sides of described frame alignment word FS; Payload region is divided into two symmetrical regions by described frame alignment word FS and two channel associated signalling territory CCF; Described frame alignment word FS takies 48 bits, and duration is 5ms; Each channel associated signalling territory CCF takies 12 bits, takies 24 bits altogether, and duration is 2.5ms; Each payload region takies 144 bits, takies 288 bits altogether, and duration is 30ms; Described protection time slot is divided into two sections, and be separately positioned on each payload district, every section takies 12 bits, takies 24 bits altogether, and duration is 2.5ms, in 1.25ms, wherein to carry out sending/receiving switch; Whole burst frame takies 384 bits altogether, and its total duration is 40ms.
2. the time division duplex transmission method of digital handset according to claim 1, is characterized in that: the transmission of described host side or called end is carried out with the different time-gap being received in same frequency channels.
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| CN201210382320.9A CN102946304B (en) | 2012-10-10 | 2012-10-10 | The time division duplex transmission method of digital handset |
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| CN201210382320.9A CN102946304B (en) | 2012-10-10 | 2012-10-10 | The time division duplex transmission method of digital handset |
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| CN102946304A CN102946304A (en) | 2013-02-27 |
| CN102946304B true CN102946304B (en) | 2015-11-18 |
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| CN103729894B (en) * | 2013-07-23 | 2017-03-22 | 深圳市金溢科技股份有限公司 | Method, device and system for ambiguous-path-recognition single-frequency-point both-way communication |
| CN105207764B (en) * | 2014-06-23 | 2019-05-31 | 海能达通信股份有限公司 | A kind of call method, system and terminal |
| CN104615573B (en) * | 2015-01-13 | 2018-01-26 | 大唐移动通信设备有限公司 | A kind of communication means and device |
| CN107105192A (en) * | 2016-02-20 | 2017-08-29 | 广州市番禺区西派电子电器厂（普通合伙） | A kind of IP network safety manages monitor |
| CN106230538B (en) * | 2016-07-28 | 2018-08-24 | 浙江天则通信技术有限公司 | A kind of point-to-point time-division two-way wireless communication method of single carrier |
| CN108012040B (en) * | 2016-10-31 | 2020-11-17 | 海能达通信股份有限公司 | Narrow-band-based data transmission method and terminal |
| CN109151813A (en) * | 2018-09-12 | 2019-01-04 | 上海纳雅智能科技有限公司 | A kind of wireless internal call method and system |
| CN111314867B (en) * | 2019-05-13 | 2022-02-08 | 展讯通信（上海）有限公司 | Voice transmission and receiving method and device of DMR system, storage medium and terminal |
| CN111212452B (en) * | 2020-01-13 | 2022-05-17 | 海能达通信股份有限公司 | Handover method for voice communication, communication system, terminal and storage medium |
| CN111313926B (en) * | 2020-02-20 | 2021-03-02 | 中国人民解放军空军特色医学中心 | Time division duplex ad hoc network wireless communication device and communication method thereof |
| CN113708796B (en) * | 2021-10-13 | 2022-02-15 | 广州慧睿思通科技股份有限公司 | Interphone communication method, interphone, narrow-band ad hoc network system and electronic device |
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Address after: 518000 Guangdong, Shenzhen, Nanshan District Nantou gateway two road strategic emerging industrial park 8 2 building Patentee after: Shenzhen Tianli Information Technology Co., Ltd. Address before: No. 88, Guangzhou City, Guangdong, Guangdong Patentee before: Guangzhou Haige Teletone Information Technology Co., Ltd. |