CN103945421A - Method for identifying broadband trunking direct mode operation call - Google Patents
Method for identifying broadband trunking direct mode operation call Download PDFInfo
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- CN103945421A CN103945421A CN201310019533.XA CN201310019533A CN103945421A CN 103945421 A CN103945421 A CN 103945421A CN 201310019533 A CN201310019533 A CN 201310019533A CN 103945421 A CN103945421 A CN 103945421A
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Abstract
The invention discloses a method for identifying a broadband trunking direct mode operation call. The method comprises the steps that a direct mode operation (DMO) terminal is configured with a synchronizing signal special for DMO calling in advance, wherein the synchronizing signal special for DMO calling is different from a synchronizing signal used in trunking mode operation calling; when a broadband trunking evolved Node B (eNB) is not involved in DMO calling between control terminals, a master control terminal of DMO calling uses the synchronizing signal special for DMO calling to initiate a DMO call on a DMO channel; and when monitoring the synchronizing signal special for DMO calling on the DMO channel, a slave terminal of DMO calling determines that the DMO call exists on the current DMO channel. By adopting the method, a DMO slave terminal in a dual-monitor mode can effectively identify the DMO call.
Description
Technical field
The present invention relates to broadband trunking communicating technology, particularly relate to the straight-through recognition methods of calling out of a kind of broadband cluster.
Background technology
In existing LTE system, after subscriber equipment (UE) start, main synchronous (PSS) signal of search and auxiliary reference synchronization (SSS) signal in several center frequency point of LTE frequency range, to realize Cell searching and synchronous.Wherein, PPSS/SSS signal is Zadeoff-Chu sequence, has very strong correlation, therefore can direct-detection and receive.Accordingly, can obtain community ID in cell set, determine the boundary of time slot of 5ms simultaneously.In addition, UE just can know the length of Cyclic Prefix by inspection PSS/SSS signal and be LTE FDD system or LTE TDD system.
PSS/SSS signal has taken 6 Resource Block (resource block, RB) of center frequency-band.PSS signal repeats taking 5ms as the cycle.PSS only has three groups, length 62.In LTE TDD, PSS is positioned at the 3rd OFDM symbol of subframe 1 and subframe 6.In LTE FDD, PSS is positioned at last OFDM symbol of subframe 1 and subframe 5.
On PSS basis, search for forward SSS signal.SSS signal is made up of two sections of random sequences, and the mapping of front and back 5ms is just in time contrary.As long as therefore receive two SSS and just can determine the border of 10ms, reach the object of frame synchronization.SSS has 168 groups, length 62.TDD SSS is positioned at last OFDM symbol of subframe 0 and subframe 5; FDD SSS is positioned at the second-to-last OFDM symbol of subframe 0 and subframe 5.
At present, the terminal of cluster mode (TMO, trunking mode of operation) can utilize existing 3 PSS to carry out clean culture Cell searching.
The terminal of broadband cluster system lose base station cover or having base station cover under in order to increase power system capacity or to support the needs such as wireless relay, can enter straight-through (DMO, Direct Mode Operation) pattern.
DMO business can be operated in independently DMO frequency range, also can share identical frequency range with the broadband trunked base station (eNB) of identical networking; When DMO main control terminal and broadband cluster eNB are when frequently working, on same carrier wave, can have two kinds of callings be that DMO calls out and TMO calls out, and in this kind of situation, the DMO slave terminal in two monitoring modes need to be identified the DMO calling in carrier wave.
At present, not yet proposing a kind of DMO slave terminal that can realize in two monitoring modes calls out and knows method for distinguishing DMO.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of broadband cluster straight-through recognition methods of calling out, and the method can realize effective identification that call out DMO the DMO slave terminal in two monitoring modes.
In order to achieve the above object, the technical scheme that the present invention proposes is:
The straight-through recognition methods of calling out of broadband cluster, comprising:
In advance for straight-through DMO terminal configuration is exclusively used in the synchronizing signal that DMO calls out, described in be exclusively used in the synchronizing signal that DMO calls out and be different from the synchronizing signal using when cluster mode is called out;
In the time that broadband trunked base station does not participate in DMO between control terminal and calls out, be exclusively used in the synchronizing signal that DMO calls out described in the main control terminal utilization that DMO calls out, on DMO channel, initiate DMO and call out;
In the time being exclusively used in the synchronizing signal of DMO calling described in the slave terminal that DMO calls out listens on described DMO channel, judging on current described DMO channel and exist DMO to call out.
In sum, the straight-through recognition methods of calling out of broadband cluster that the present invention proposes, the synchronizing signal that is exclusively used in DMO calling by setting indicates broadband cluster DMO to call out, and this synchronizing signal is different from the synchronizing signal using when cluster mode is called out, DMO slave terminal can be monitored DMO calling and TMO calling simultaneously, thereby realize effective identification that TMO is called out.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: the specification in agreement of eNB (168 × 3=) 504Ge community ID of considering LTE, support the terminal of LTE standard to configure according to standard agreement, cannot for calling out, DMO open up separately DMO ID resource again, the present invention will set up the synchronizing signal that is exclusively used in DMO business, and this synchronizing signal will be different from the synchronizing signal using when cluster mode is called out.Like this, the terminal of cluster mode can utilize existing 3 PSS to carry out cluster Cell searching; Open the terminal of DMO pattern and can utilize the synchronizing signal that is exclusively used in DMO business to carry out DMO signal search, whether perception has initiation DMO in the same frequency range of DMO caller to call out.So, the broadband colony terminal of opening DMO pattern can, in the situation that keeping linking with broadband trunked base station, monitor the existence of DMO call business in same frequency range simultaneously, realizes the identification that DMO is called out.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one, and as shown in Figure 1, this embodiment mainly comprises:
Step 101, in advance for straight-through DMO terminal configuration is exclusively used in the synchronizing signal that DMO calls out, described in be exclusively used in the synchronizing signal that DMO calls out and be different from the synchronizing signal using when cluster mode is called out.
In actual applications, described DMO terminal can be colony terminal or ordinary terminal.
In this step, described in be exclusively used in DMO call out synchronizing signal can default in DMO terminal, also can, after DMO accessing terminal to network, be configured by network side.
Here, by making the synchronizing signal that is exclusively used in DMO calling be different from the synchronizing signal using when cluster mode is called out, can guarantee that DMO calls out and TMO calling distinguishes, DMO slave terminal can be monitored DMO calling and TMO calling simultaneously, thereby realize effective identification that call out TMO DMO slave terminal.
Preferably, the synchronizing signal that is exclusively used in DMO calling described in can be random sequence.
Preferably, the synchronizing signal that is exclusively used in DMO calling described in can be for being exclusively used in master sync signal (PSS) and auxiliary synchronous signals (SSS) combination of straight-through DMO calling.Wherein, described PSS is different from the master sync signal using when cluster mode is called out, that is to say, the root index value u of the Zadeoff-Chu sequence that described PSS is corresponding is different from root index value corresponding to master sync signal using when cluster mode is called out, and u is not 25,29,34.The configuration scope of described SSS can be called out with existing TMO the scope of the SSS using.
Preferably, the synchronizing signal that is exclusively used in DMO calling described in can also be a kind of or any one combination in Walsh walsh code, Orthogonal Variable Spreading Factor OVSF ovsf code and two mutual-complementing code.In addition, the quantity that is exclusively used in the PSS that DMO calls out described in actual applications can be one, can be also multiple, by the quantity of expansion PSS, can make the capacity of DMO calling be expanded.
Step 102, in the time that broadband trunked base station does not participate in DMO between control terminal and calls out, be exclusively used in the synchronizing signal that DMO calls out described in the main control terminal utilization that DMO calls out, on DMO channel, initiate DMO and call out.
In this step, on DMO channel, initiate DMO call out concrete grammar with existing trunked call method, difference be the present invention utilize be increase newly be exclusively used in DMO call out synchronizing signal call out.Particularly, be while being exclusively used in PSS that straight-through DMO calls out and SSS combination when being exclusively used in synchronizing signal that DMO calls out, initiate the method that DMO calls out and can be:
First DMO main control terminal monitors the duration τ of appointment, monitors the PSS that is exclusively used in DMO calling referring to newly-increased here and carries out DMO call search (being similar to the process of LTE Cell searching).Exceed default threshold value if be exclusively used in the PSS signal strength signal intensity of DMO calling described in not listening to, judge in current carrier wave and do not have DMO to call out, now DMO channel idle is described, can initiate new DMO synchronizing signal; If detect that newly-increased PSS signal strength signal intensity exceedes threshold value, judge in this DMO carrier wave and had DMO to call out, can not initiate new DMO synchronizing signal.In actual applications, while initiating DMO synchronizing signal, method, modulation system etc. that the PSS that is exclusively used in DMO calling is mapped on subcarrier can adopt the mode identical with existing LTE PSS signal, the software and hardware of multiplexing PSS signal.
Particularly, broadband trunked base station does not participate in the scene that DMO between control terminal calls out and can comprise following situation:
In the time supporting that the terminal of DMO function is initiated DMO calling;
In the time supporting the terminal of DMO function to be in wireless relay links and need to carry out business forwarding;
When need to detecting this DMO in time, the slave terminal that DMO calls out calls out, and when responding in time and receiving business datum; And
When DMO callwork is during in special frequency range.
Step 103, in the time that the slave terminal that DMO calls out is exclusively used in the synchronizing signal that DMO calls out described in listening on described DMO channel, judge on current described DMO channel and exist DMO to call out.
Can find out from technique scheme, the present invention utilizes newly-increased synchronizing signal, can effectively realize the slave terminal that enters DMO pattern to effective identification of DMO business, the coherent detection of the synchronizing signal of in the method, eNB-PSS and DMO being exhaled is independently, it is consistent that terminal is carried out the handling process that the flow process of DMO monitoring carries out LTE Cell searching with terminal, whole flow processs of broadband colony terminal Cell searching are kept, the hardware and software that can reuse LTE standard operates, can not bring too large expense to terminal processes amount, therefore can realize with very little cost based on broadband colony terminal chip.
It should be noted that, the present invention is not only applicable to the group system based on LTE, is applicable to the group system based on 3G cellular network (as WCDMA, TD-SCDMA, CDMA2000 etc.) yet
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. the straight-through recognition methods of calling out of broadband cluster, is characterized in that, comprising:
In advance for straight-through DMO terminal configuration is exclusively used in the synchronizing signal that DMO calls out, described in be exclusively used in the synchronizing signal that DMO calls out and be different from the synchronizing signal using when cluster mode is called out;
In the time that broadband trunked base station does not participate in DMO between control terminal and calls out, be exclusively used in the synchronizing signal that DMO calls out described in the main control terminal utilization that DMO calls out, on DMO channel, initiate DMO and call out;
In the time being exclusively used in the synchronizing signal of DMO calling described in the slave terminal that DMO calls out listens on described DMO channel, judging on current described DMO channel and exist DMO to call out.
2. method according to claim 1, is characterized in that, describedly does not participate in when DMO between control terminal calls out comprising when broadband trunked base station:
In the time supporting that the terminal of DMO function is initiated DMO calling;
In the time supporting the terminal of DMO function to be in wireless relay links and need to carry out business forwarding;
When need to detecting this DMO in time, the slave terminal that DMO calls out calls out, and when responding in time and receiving business datum; And
When DMO callwork is during in special frequency range.
3. method according to claim 1, it is characterized in that, the synchronizing signal that the described DMO of being exclusively used in calls out is to be exclusively used in master sync signal PSS and the auxiliary synchronous signals SSS combination that straight-through DMO calls out, and described PSS is different from the master sync signal using when cluster mode is called out.
4. method according to claim 1, is characterized in that, described in be exclusively used in DMO call out synchronizing signal be random sequence.
5. method according to claim 1, is characterized in that, described in be exclusively used in DMO call out synchronizing signal be Zadeoff-Chu sequence.
6. method according to claim 1, is characterized in that, described in to be exclusively used in the synchronizing signal that DMO calls out be a kind of or any one combination in Walsh walsh code, Orthogonal Variable Spreading Factor OVSF ovsf code and two mutual-complementing code.
7. method according to claim 1, is characterized in that, described DMO terminal is colony terminal or ordinary terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310019533.XA CN103945421A (en) | 2013-01-18 | 2013-01-18 | Method for identifying broadband trunking direct mode operation call |
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| CN201310019533.XA CN103945421A (en) | 2013-01-18 | 2013-01-18 | Method for identifying broadband trunking direct mode operation call |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591712A (en) * | 2014-10-23 | 2016-05-18 | 普天信息技术有限公司 | Method of indicating control channel in direct mode and terminal |
| CN106162858A (en) * | 2015-04-17 | 2016-11-23 | 普天信息技术有限公司 | Directintermination time synchronization method and device |
| CN106604201A (en) * | 2015-10-15 | 2017-04-26 | 普天信息技术有限公司 | Wireless time-frequency resource distribution and indication method of broadband trunked DMO system |
| CN106612558A (en) * | 2015-10-27 | 2017-05-03 | 普天信息技术有限公司 | Wireless time-frequency resource conflict resolution method and DMO terminal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591712A (en) * | 2014-10-23 | 2016-05-18 | 普天信息技术有限公司 | Method of indicating control channel in direct mode and terminal |
| CN105591712B (en) * | 2014-10-23 | 2018-07-24 | 普天信息技术有限公司 | The indicating means and terminal of control channel under direct mode operation |
| CN106162858A (en) * | 2015-04-17 | 2016-11-23 | 普天信息技术有限公司 | Directintermination time synchronization method and device |
| CN106162858B (en) * | 2015-04-17 | 2019-08-16 | 普天信息技术有限公司 | Directintermination time synchronization method and device |
| CN106604201A (en) * | 2015-10-15 | 2017-04-26 | 普天信息技术有限公司 | Wireless time-frequency resource distribution and indication method of broadband trunked DMO system |
| CN106604201B (en) * | 2015-10-15 | 2019-10-22 | 普天信息技术有限公司 | A kind of wireless time-frequency resource allocating and indicating means of broadband cluster DMO system |
| CN106612558A (en) * | 2015-10-27 | 2017-05-03 | 普天信息技术有限公司 | Wireless time-frequency resource conflict resolution method and DMO terminal |
| CN106612558B (en) * | 2015-10-27 | 2019-10-08 | 普天信息技术有限公司 | A kind of wireless running time-frequency resource contention resolution and DMO terminal |
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Application publication date: 20140723 |