CN103516453A - Multi-slot frame structure adopting time division multiple access mode and application thereof - Google Patents
Multi-slot frame structure adopting time division multiple access mode and application thereof Download PDFInfo
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Abstract
The invention relates to a multi-slot frame structure adopting a time division multiple access mode and a communication method based on the frame structure. The multi-slot frame structure adopting a time division multiple access mode comprises a starting time slot located at a frame head and at least one regular service time slot. The regular service time slots include a downlink time slot group and an uplink time slot group, the junction of the downlink time slot group and the uplink time slot group is a transmitting/receiving conversion point, and the frame structure has one transmitting/receiving conversion point. The beneficial effect is that the technical scheme of the invention provides a solution for the technical problems of an existing narrowband digital wireless communication system such as low transmission efficiency, large data delay, complex signaling and service data transmission scheme and the like.
Description
Technical field
The present invention relates to a kind of frame structure, more particularly, relate to a kind of frame structure that adopts the multi-slot of time division multiple access access module, and the communication means of the frame structure based on described.
Background technology
At present, various wireless communication technology development are rapid, and band resource is more and more nervous.Traditional intercom, trunking communication adopt analog system, and a pair of frequency spectrum can only carry a speech business, and efficiency of transmission is low, and confidentiality is poor.
In order to overcome the shortcoming of traditional analog intercom system, American-European a plurality of countries have proposed various narrow-band digital communication plans at present, replace gradually original simulation intercom system.And China is aspect digital intercom communication standard and technical research, relatively lag behind, lack competitive scheme and technology.
Existing narrow-band digital intercommunication standard criterion frame, by ETSI(ETSI: DMR(digital mobile radio communication European Telecommunications Standards Institute) proposing: Digital Mobile Radio) standard is a comparatively ripe standard, support great Qu networking processed, adopt the carrier widths of 12.5KHz, frame length 60ms.As shown in Figure 1, a frame comprises 2 time slots, can support 2 tunnel voice communications, and capacity relative traditional analog intercom system has promoted one times.
For DMR system, voice transfer adopts the mode of superframe.As shown in Figure 2,6 radio frames form a superframe, in each frame, can embed synchronizing sequence or control signal, for receiving equipment is synchronous, detect and link control.
Above-mentioned digital intercom technology, although had very large improvement than analogue system, aspect channel capacity, efficiency of transmission and time delay, still has the improved aspect of needs.
Chinese patent application 200610157418.9 discloses communication means and the device thereof in a kind of TDD mode, the method comprises: transmission Random Access Channel, this Random Access Channel is away from descending/up protection time slot, on the band segment of specified upstream time slot, transmit, and this Random Access Channel can, to adjacent ascending time slot expansion, form expansion access channel; Descending/up protection time slot can, to adjacent time slot expansion, form expanded downstream/up protection time slot.
Chinese patent ZL 200510076922.1 discloses a kind of communication means of time division duplex mobile communication system, comprise: (1) arranges least unit and the system frame structure of Transmission Time Interval TTI, each wireless sub-frame is comprised of several business time-slots and the special time slot that comprises at least two translation and protection time slots, and TTI be take some business time-slots as unit; (2) frame structure that the data that transmitting terminal sends needs are set according to step (1) sends by radio frequency after encoding, modulating; (3) the first demodulation of receiving terminal reception data, data corresponding to the rear acquisition of frame structure decoding of then setting according to step (1), the TTI setting according to step (1) subsequently returns to reception response message, so that transmitting terminal sends next data, and then complete transfer of data.Special time slot can also comprise a UpPTS and a DwPTS time slot, or also comprises a DwPTS time slot.
Above-mentioned two patent documentations are disclosed technical scheme respectively, although improved together channel capacity, efficiency of transmission and the time delay aspect of existing digital intercom technology in degree, but from its frame structure, all have the deficiency that structure is more complicated, channel capacity, efficiency of transmission, data delay are still not ideal enough.Along with the expansion type development of data traffic requirement, be difficult to meet the demand of development, there is larger room for improvement.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide compared with prior art a kind of, channel capacity has further lifting, signalling is simple, communication delay is little, system adopts the frame structure of the multi-slot of time division multiple access access module flexibly to broadband evolution, and the communication means of the frame structure based on described is provided.
Technical scheme of the present invention is as follows:
A frame structure for the multi-slot of time division multiple access access module, comprises the initial time slot that is positioned at frame head, and an above conventional business time-slot; Described conventional business time-slot comprises descending time slot group and ascending time slot group, and the intersection of descending time slot group and ascending time slot group is transmitting-receiving transfer point, and the transmitting-receiving transfer point described in frame structure is one.
As preferably, described initial time slot is shorter than conventional business time-slot.
As preferably, described initial time slot configuration is descending, for bearing system broadcast message or control signal.
As preferably, in the position of described transmitting-receiving transfer point, be provided with protection time slot, for the radio frequency of communication equipment, complete to receive sending conversion, and offset the spatial time delay between communication equipment.
As preferably, the afterbody of each ascending time slot of described ascending time slot group disposes protection symbol.
As preferably, the protection symbol of each ascending time slot is equal in length.
As preferably, described initial time slot, conventional business time-slot include 2 pilots, 3 data segments; The formation of structure of time slot is followed successively by: the first data segment, the first pilot, the second data segment, the second pilot, the 3rd data segment; Described pilot carrying pilot frequency sequence; Described data segment is for carrier signaling, voice or data message.
As preferably, the first data segment, the second data segment, the 3rd data segment equal in length, the first pilot, the second pilot equal in length.
As preferably, the descending time slot of descending time slot group is corresponding one by one with the ascending time slot of ascending time slot group.
As preferably, described descending time slot group comprises 3 descending time slots, and ascending time slot group comprises 3 ascending time slots.
A communication means for the frame structure of the multi-slot of employing time division multiple access access module, signaling channel and data traffic channels adopt time division multiplexing;
Step is as follows:
1) base station equipment sends broadcast message or descending control signaling, in described broadcast message or descending control signaling, comprises channel busy indication bit, is used to indicate the busy-idle condition of each time slot;
2) travelling carriage listening broadcast information or descending control signaling, obtain channel busy information;
3) travelling carriage obtains after idle channel indication information, on ascending time slot corresponding to idle channel, initiates access request;
4) on the corresponding descending time slot of ascending time slot with selecting, receive the response signaling of base station equipment to access request, link establishment;
5) in the enterprising industry business of the channel of selecting transmitting-receiving.
As preferably, step 1) is specially:
1.1) travelling carriage has service request;
1.2) access counter sets to 0, and starts timer;
1.3) base station equipment sends broadcast message or descending control signaling on initial time slot.
As preferably, step 2) be specially:
2.1) monitor broadcast message or the descending control signaling that on initial time slot, base station equipment sends;
2.2) judge whether available free channel, if had, carry out step 3); If not, judge that whether timer is overtime, if timer is not overtime, repeating step 2.1), if timer expiry, access failure, finishes this access attempts.
As preferably, step 4) is specially:
4.1) on the corresponding descending time slot of ascending time slot with selecting, monitor descending control signaling;
4.2) judge whether to receive the link establishment order that base station equipment sends, if so, link establishment, and carry out step 5); If not, counter adds 1, and compares with the random access attempts number of times that default maximum allows; If counter is equal to or greater than the maximum random access attempts number of times allowing, access failure, finishes this access attempts; If counter is less than the maximum random access attempts number of times allowing, judge that whether timer is overtime, if timer is not overtime, repeating step 2.1), if timer expiry, access failure, finishes this access attempts.
As preferably, the link establishment order described in step 4) comprises channel configuration indication, down channel and the up channel of indication configuration.
A kind of communication means of frame structure of the multi-slot based on employing time division multiple access access module, configuration is based on adopting a pair of ascending time slot, descending time slot of frame structure of multi-slot of time division multiple access access module as for carrying up signaling channel, the downlink signaling channel of uplink and downlink control signal, and described method step is as follows:
1) Mobile Origination access, sends request for building link;
2) travelling carriage receives the request for building link response that base station equipment sends on downlink signaling channel;
3) in the enterprising industry business of downlink signaling channel, up signaling channel of request for building link response configuration, receive and dispatch.
As preferably, step 1) is specially:
1.1) travelling carriage has service request;
1.2) access counter sets to 0;
1.3) on up signaling channel, send request for building link.
As preferably, step 2) be specially:
2.1) monitor the descending control signaling on downlink signaling channel;
2.2) judge whether to receive the request for building link response that base station equipment sends, if so, link establishment, carries out step 3); If not, counter adds 1, and compares with the random access attempts number of times that default maximum allows; If counter is equal to or greater than the maximum random access attempts number of times allowing, access failure, finishes this access attempts; If counter is less than the maximum random access attempts number of times allowing, select at random the rollback value of rollback timer, and after rollback timer expiry, repeating step 1.3).
As preferably, step 3) is specially: base station equipment is indicated channel configuration in setting up link request response message, the channel configuration that travelling carriage is indicated in setting up link request response message according to base station equipment, forwards the enterprising industry business of the channel transmitting-receiving of channel configuration indication to.
The method of the information type sending on a kind of detection channel of frame structure of the multi-slot based on employing time division multiple access access module, configuration: when data segment transmission information type is business datum, the phase place of the first pilot is the first phase place, and the phase place of the second pilot is the second phase place; When data segment transmission information type is control signal, the phase place of the first pilot is third phase position, and the phase place of the second pilot is the 4th phase place.
Described method is specific as follows:
Receiving equipment detects the 3rd pilot, the 4th pilot receiving, and the 3rd described pilot is corresponding with the first pilot, and the phase place of the 3rd pilot is the 5th phase place, and the 4th pilot is corresponding with the second pilot, and the phase place of the 4th pilot is the 6th phase place;
If the 5th phase place equates with the first phase place, the 6th phase place equates with the second phase place simultaneously, and what the first data segment, the second data segment, the 3rd data segment carried is business datum;
If the 5th phase place equates with third phase position, the 6th phase place equates with the 4th phase place simultaneously, and what the first data segment, the second data segment, the 3rd data segment carried is control signal.
As preferably, described method, further comprises: if the 5th phase place and the first phase place are not etc., the 6th phase place and the second phase place are not etc. simultaneously; Meanwhile, if the 5th phase place and third phase position are not etc., the 6th phase place and the 4th phase place not etc., do not detect mistake, the business datum of abandoning receiving simultaneously.
As preferably, the first described phase place equates with the 4th phase place, and the second phase place equates with third phase position.
As preferably, described method is that the pilot on each time slot is detected.
As preferably, described business datum is voice, circuit data or grouped data.
Beneficial effect of the present invention is as follows:
The present invention proposes a kind of frame structure and transmission mode, adopt time division multiple access access module, a frame comprises a plurality of business time-slots and a time slot, for carrying data, voice or signaling.
Business time-slot can be configured to upstream or downstream as required, has protection time slot between up-downgoing transfer point.For each business time-slot, embed two pilot frequency sequences, for synchronously detection of recipient, data demodulates and phase place adjustment.For each time slot, by two pilot frequency sequence phase places, change the information type of indication current time slots carrying.
For whether configuring special time interval resource, carry out carrier signaling channel, system can be supported normal mode and two kinds of transmission modes of mode of extension.For normal mode, signaling channel does not have the carrying of special-purpose time slot, need to business datum time division multiplex channel resource, when access, travelling carriage listening broadcast or down control channel, indicate by channel busy, selects idle channel to access; For mode of extension, system can configure special uplink and downlink timeslot and carry up-downgoing control signal, and when access, travelling carriage accesses at random on dedicated signaling time slot, on the special-purpose signalling time slot, receives descending control signaling.
Technical solutions according to the invention solve existing narrow-band digital wireless communication system, the technical problem such as efficiency of transmission is low, data delay is large, signaling and business data transmission scheme complexity.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of existing narrow-band digital intercommunication standard criterion frame;
Fig. 2 is that DMR system is for the structural representation of superframe that voice transfer adopts;
Fig. 3 is the structural representation of an embodiment of frame of the present invention;
Fig. 4 is that frame of the present invention is the structural representation of 0 o'clock at protection symbol;
Fig. 5 is the structural representation of the time slot of frame of the present invention;
Fig. 6 is the flow chart of a kind of communication means of the present invention;
Fig. 7 is the detailed step flow chart of flow process shown in Fig. 6;
Fig. 8 is the flow chart of another kind of communication means of the present invention;
Fig. 9 is the detailed step flow chart of flow process shown in Fig. 8;
Figure 10 is the flow chart of the method for the information type that sends on detection channel of the present invention;
In figure: GP is protection time slot, and D1 is the first data segment, and D2 is the second data segment, and D3 is the 3rd data segment, and P1 is the first pilot, and P2 is the second pilot, GP4 is the 4th protection symbol, and GP5 is the 5th protection symbol, and GP6 is the 6th protection symbol.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 3, a kind of frame structure of multi-slot, adopts time division multiple access access module.A radio frames comprises gap and 6 conventional time slots in short-term.Between adjacent sending time slots and receiving slot, (receive and dispatch transfer point place), leave the protection time slot GP that a length is TGP, for the radio frequency of communication equipment, complete reception/transmission conversion and offset the spatial time delay between communication equipment.Frame of the present invention, only has a transmitting-receiving transfer point in a radio frames.
Time slot 0 is the initial time slot in a radio frames, is positioned at the frame head of radio frames, and fixed configurations is descending, is mainly used in carrying system broadcast information or the control signal that the first communication equipment sends.6 conventional business time-slots after time slot 0, are defined as respectively time slot 1 to time slot 6, for voice-bearer, data or signaling.For each conventional time slot, can be configured to and send or receive.In the present embodiment, time slot 1,2,3 is configured to descending, time slot 4,5,6 is configured to up.
In order to reach more excellent effect, at the afterbody of each ascending time slot, also configurable length is respectively T
gPnprotection symbol (n be ascending time slot numbering).
As another execution mode, work as T
gPnwhile being all set to 0 symbol lengths, frame structure is shown in Fig. 4, only has protection time slot GP in frame structure, and the afterbody of each ascending time slot is unprotect symbol.
Generalized slot structure as shown in Figure 5, each time slot comprises 2 pilots and 3 data segments, the formation of structure of time slot is followed successively by: the first data segment D1, the first pilot P1, the second data segment D2, the second pilot P2, the 3rd data segment D3.Pilot carrying pilot frequency sequence, detects synchronously, auxiliary data demodulation, carries out phase place, frequency deviation adjustment etc. for recipient, and for pilot frequency sequence, recipient can be used for auxiliary data demodulation, also can be not used in auxiliary data demodulation.Data segment is for carrier signaling, voice or data message.
In the present embodiment, for described frame structure, an one radio frames length is T ms, comprises N symbol.The sign digit S that each time slot comprises
n, wherein n is time-gap number.
, for each time slot, the length of the first pilot P1 and the second pilot P2 is N
pindividual symbol, the symbol lengths of the first data segment D1, the first data segment D1, the first data segment D1 is respectively N
d1, N
d2, N
d3.
Can find out, for time slot n, N
d1+ N
d2+ N
d3+ 2*N
p=S
n.When the carrier bandwidths adopting in system is 25kHz, T is 45ms, and N is 864 symbols, N
pbe 8 symbols.For time slot 0, N
d1=N
d2=N
d3=22 symbols, for conventional time slot (time slot 0 is to time slot 6), N
d1=N
d2=N
d3=36 symbols, remaining 38 allocation of symbols are given protection time slot GP, the 4th protection symbol GP4, the 5th protection symbol GP5 and the 6th protection symbol GP6.When the length of the 4th protection symbol GP4, the 5th protection symbol GP5 and the 6th protection symbol GP6 is all set to 0, protect the length T of time slot GP
gPbe 38 symbols; If work as T
gP4=T
gP5=T
gP6=4 o'clock, T
gP=26.
In above-mentioned structure of time slot, pilot is fixing to be adopted
modulation system.For data segment, when for bearing system broadcast message, control signal or voice messaging, adopt
modulation system; When for carry data information, can adopt
modulation system or
which kind of modulation system is modulation system, specifically adopt, and by control signal, indicates.
If a (m) represents to need the bit sequence of transmission, wherein m is bit sequence number.It is upper that transmitting bit sequence will be mapped to modulation symbol sequence s (k), and wherein k is corresponding symbol sequence number.Modulation symbol s (k) is by by following formula, the mode by differential coding obtains:
s(0)=1;
For
as shown in table 1 with the relation of hinting obliquely at of transmitted bit:
Table 1:
phase shift rule
As shown in Table 1, complex modulation symbols s (k) has eight kinds of possibility value: e
jn π/4, when k is even number, n=2,4,6,8; When k is odd number, n=1,3,5,7.
For
as shown in table 2 with the relation of hinting obliquely at of transmitted bit:
Table 2:
phase shift rule
As shown in Table 2, complex symbol s (k) has 16 kinds of possibility value: e
jn π/8, when k is even number, n=2,4,6,8,10,12,14,16; When k is odd number, n=1,3,5,7,9,11,13,15.
System based on frame structure of the present invention is supported two kinds of transmission modes, i.e. normal mode and mode of extension.
When being configured to normal mode, each conventional time slot all can bearer service data and signaling;
When being configured to mode of extension, system specially reserved certain channel is used for carrying up-downgoing signaling, and the Signalling exchange between communication equipment is carried by the channel of appointment.
In a radio frames, each time slot can be configured to a channel, according to time slot, is upstream or downstream, corresponds to up channel or down channel.In once communicating by letter, configurable a pair of up-downgoing channel, or a unidirectional upstream or downstream channel.For the configuration of channel, can notify by broadcast signaling or descending control signaling, also can adopt default configuration mode, for example, when the pairing of up-downgoing channel is used, time slot 1 and time slot 4 are paired into a channel, time slot 2 and time slot 5 pairings, time slot 3 and time slot 6 pairings.
The present invention also provides the communication means of the frame structure of the multi-slot based on employing time division multiple access access module.
Method one:
The communication means of the frame structure of a kind of multi-slot based on employing time division multiple access access module as shown in Figure 6, for system works is under normal mode, the process step of link establishment.Signaling channel and data traffic channels adopt time division multiplexing.
Base station equipment can be on time slot 0 timed sending downlink system broadcast message or control signal.In system broadcast information or control signal, comprise channel busy indication bit, be used to indicate the busy-idle condition of each time slot, when travelling carriage is wanted connecting system like this, can, according to the channel busy indication in system broadcast information or control signal, select any one idle channel access.Travelling carriage obtains after idle channel indication information, on ascending time slot corresponding to idle channel, initiate random access, and receive descending control signaling on corresponding descending time slot, according to descending control signaling, indicate, after link establishment success, can start service communication, use the uplink and downlink timeslot distributing to receive and send.
More specifically, in order to reach further effect, described method can also comprise judgement and the processing of timer, exceptional condition.As shown in Figure 7, wherein I is random access attempts counter, I
maxfor the random access attempts number of times that maximum allows, can be by system configuration; T is access delay timer.
Concrete steps are as follows:
1.1) travelling carriage has service request;
1.2) access counter sets to 0, and starts timer;
1.3) base station equipment sends broadcast message or descending control signaling on initial time slot;
2.1) monitor broadcast message or the descending control signaling that on initial time slot, base station equipment sends;
2.2) judge whether available free channel, if had, carry out step 3); If not, judge that whether timer is overtime, if timer is not overtime, repeating step 2.1), if timer expiry, access failure, finishes this access attempts;
3) travelling carriage obtains after idle channel indication information, on ascending time slot corresponding to idle channel, initiates access request;
4.1) on the corresponding descending time slot of ascending time slot with selecting, monitor descending control signaling;
4.2) judge whether to receive the link establishment order that base station equipment sends, if so, link establishment, and carry out step 5); If not, counter adds 1, and compares with the random access attempts number of times that default maximum allows; If counter is equal to or greater than the maximum random access attempts number of times allowing, access failure, finishes this access attempts; If counter is less than the maximum random access attempts number of times allowing, judge that whether timer is overtime, if timer is not overtime, repeating step 2.1), if timer expiry, access failure, finishes this access attempts;
5) in the enterprising industry business of the channel of selecting transmitting-receiving.
Another execution mode, the link establishment order described in step 4) comprises channel configuration indication, down channel and the up channel of indication configuration.Step 5) is that terminal equipment is in the enterprising industry business of the channel transmitting-receiving of configuration.
Method two:
The communication means of the frame structure of the multi-slot of another kind as shown in Figure 8 based on employing time division multiple access access module, for system works is under mode of extension, the process step of link establishment.
For mode of extension, the fixing channel of system configuration is exclusively used in Signalling exchange between base station equipment and terminal equipment, signaling channel can be notified by broadcast signaling, also can adopt default configuration, for example can default configuration time slot 1 and time slot 4 as downlink signaling channel and up signaling channel.Under default configuration pattern, when travelling carriage need to carry out service communication, first on the up signaling channel of configuration, initiate random access, and monitor downlink signaling channel, receive the response message of base station equipment, if receive base station equipment link setup request response, the channel allocation of indicating in link setup response message according to base station, forwards the transmitting-receiving of the enterprising lang sound of corresponding channel or data to.
More specifically, in order to reach further effect, described method also comprises judgement and the processing of timer, exceptional condition, and as shown in Figure 9, wherein I is random access attempts counter, I
maxfor the random access attempts number of times that maximum allows, can be by system configuration.
Concrete steps are as follows:
1.0) configuration is based on adopting a pair of ascending time slot, descending time slot of frame structure of multi-slot of time division multiple access access module as for carrying up signaling channel, the downlink signaling channel of uplink and downlink control signal;
1.1) travelling carriage has service request;
1.2) access counter sets to 0;
1.3) on up signaling channel, send request for building link;
2.1) monitor the descending control signaling on downlink signaling channel;
2.2) judge whether to receive the request for building link response that base station equipment sends, if so, link establishment, carries out step 3); If not, counter adds 1, and compares with the random access attempts number of times that default maximum allows; If counter is equal to or greater than the maximum random access attempts number of times allowing, access failure, finishes this access attempts; If counter is less than the maximum random access attempts number of times allowing, select at random the rollback value of rollback timer, and after rollback timer expiry, repeating step 1.3);
3) in the enterprising industry business of downlink signaling channel, up signaling channel of configuration, receive and dispatch.
The present invention also provides a kind of method of passing through the information type that sends on the different incompatible detection channel of phase-group of two pilots.Described method is based on frame structure of the present invention.
In each time slot, the information of each carrying may have business datum or control signal, in order to allow, receives the type that can distinguish transmission information, can be by incompatible indication of phase-group of the first pilot P1 in each time slot and the second pilot P2.For the first pilot P1 and the second pilot P2, it is business datum when (comprising voice, circuit data or grouped data) that data segment sends information type, and the phase place of the first pilot P1 and the second pilot P2 is respectively the first phase place and the second phase place; When data segment transmission information type is control signal, the phase place of the first pilot P1 and the second pilot P2 is respectively third phase position and the 4th phase place.First receiving equipment detects the pilot frequency sequence receiving, and with the first known pilot P1 and the second pilot P2, compares respectively with the 3rd pilot receiving and the 4th pilot.
If phase place the 5th phase place of the 3rd pilot receiving approaches or equals the first phase place, the phase place of the 4th pilot the 6th phase place approaches or equals the second phase place, what expression received is business datum, that is, what the first data segment, the second data segment, the 3rd data segment carried is business datum;
If phase place the 5th phase place of the 3rd pilot receiving approaches or equals third phase position, the phase place of the 4th pilot the 6th phase place approaches or equals the 4th phase place, what expression received is control signal, that is, what the first data segment, the second data segment, the 3rd data segment carried is control signal.
Take time slot 0 as example, and system broadcast information and control signal carry out time division multiplexing, and what employing pilot phase carried out the carrying of designation data section is system broadcast information or descending control signaling.What judge transmission is system broadcasts or descending control signaling, by the incompatible indication of phase-group of the first pilot P1 and the second pilot P2, set the first pilot P1 and the second pilot P2 when sending broadcast message, phase place is respectively the first phase place and the second phase place; Sending control signaling or during call signaling, phase place is respectively third phase position and the 4th phase place.In the present embodiment, the second phase place equates with third phase position, and the first phase place equates with the 4th phase place.In the present embodiment, defining the first phase place is 45 °, and when the second phase place is 225 °, for time slot 0, what represent current transmission is system broadcast information, and to other conventional business time-slots, what represent transmission is business datum; When the first phase place is 225 °, when the second phase place is 45 °, for time slot 0 and other conventional business time-slots, what represent current transmission is control signal.
For the determination methods of other conventional business time-slots with identical for the determination methods of time slot 0.
As shown in figure 10: receiving equipment receives pilot tone and data; Receiving equipment detects the pilot frequency sequence receiving, and with the first known pilot P1 and the second pilot P2, compares respectively with the 3rd pilot receiving and the 4th pilot; If the 5th phase place of the 3rd pilot receiving approaches or equals the first phase place, the 6th phase place of the 4th pilot approaches or equals the second phase place, and what expression received is broadcast message; If the phase place of the 3rd pilot receiving and the 4th pilot approaches or equals phase place is respectively third phase position and the 4th phase place, what expression received is control signal.
If the 5th phase place and the first phase place are not etc., the 6th phase place and the second phase place are not etc. simultaneously; Meanwhile, if the 5th phase place and third phase position are not etc., the 6th phase place and the 4th phase place not etc., do not detect mistake, the business datum of abandoning receiving simultaneously.
Above-described embodiment is only for the present invention is described, and not as limitation of the invention.So long as according to technical spirit of the present invention, to above-described embodiment change, modification etc. all will drop in the scope of claim of the present invention.
Claims (24)
1. a frame structure that adopts the multi-slot of time division multiple access access module, is characterized in that, comprises the initial time slot that is positioned at frame head, and an above conventional business time-slot; Described conventional business time-slot comprises descending time slot group and ascending time slot group, and the intersection of descending time slot group and ascending time slot group is transmitting-receiving transfer point, and the transmitting-receiving transfer point described in frame structure is one.
2. the frame structure of the multi-slot of employing time division multiple access access module according to claim 1, is characterized in that, described initial time slot is shorter than conventional business time-slot.
3. the frame structure of the multi-slot of employing time division multiple access access module according to claim 1, is characterized in that, described initial time slot configuration is descending, for bearing system broadcast message or control signal.
4. the frame structure of the multi-slot of employing time division multiple access access module according to claim 1; it is characterized in that; position at described transmitting-receiving transfer point is provided with protection time slot, completes to receive sending conversion, and offset the spatial time delay between communication equipment for the radio frequency of communication equipment.
5. the frame structure of the multi-slot of employing time division multiple access access module according to claim 4, is characterized in that, the afterbody of each ascending time slot of described ascending time slot group disposes protection symbol.
6. the frame structure of the multi-slot of employing time division multiple access access module according to claim 5, is characterized in that, the protection symbol of each ascending time slot is equal in length.
7. the frame structure of the multi-slot of employing time division multiple access access module according to claim 1, is characterized in that, described initial time slot, conventional business time-slot include 2 pilots, 3 data segments; The formation of structure of time slot is followed successively by: the first data segment, the first pilot, the second data segment, the second pilot, the 3rd data segment; Described pilot carrying pilot frequency sequence; Described data segment is for carrier signaling, voice or data message.
8. the frame structure of the multi-slot of employing time division multiple access access module according to claim 7, is characterized in that, the first data segment, the second data segment, the 3rd data segment equal in length, the first pilot, the second pilot equal in length.
9. according to the frame structure of the multi-slot of the employing time division multiple access access module described in claim 1 to 8 any one, it is characterized in that, the descending time slot of descending time slot group is corresponding one by one with the ascending time slot of ascending time slot group.
10. the frame structure of the multi-slot of employing time division multiple access access module according to claim 9, is characterized in that, described descending time slot group comprises 3 descending time slots, and ascending time slot group comprises 3 ascending time slots.
The communication means of the frame structure of 11. 1 kinds of multi-slots based on employing time division multiple access access module, is characterized in that, signaling channel and data traffic channels adopt time division multiplexing;
Step is as follows:
1) base station equipment sends broadcast message or descending control signaling, in described broadcast message or descending control signaling, comprises channel busy indication bit, is used to indicate the busy-idle condition of each time slot;
2) travelling carriage listening broadcast information or descending control signaling, obtain channel busy information;
3) travelling carriage obtains after idle channel indication information, on ascending time slot corresponding to idle channel, initiates access request;
4) on the corresponding descending time slot of ascending time slot with selecting, receive the response signaling of base station equipment to access request, link establishment;
5) in the enterprising industry business of the channel of selecting transmitting-receiving.
The communication means of the frame structure of 12. multi-slots based on employing time division multiple access access module according to claim 11, is characterized in that, step 1) is specially:
1.1) travelling carriage has service request;
1.2) access counter sets to 0, and starts timer;
1.3) base station equipment sends broadcast message or descending control signaling on initial time slot.
The communication means of the frame structure of 13. multi-slots based on employing time division multiple access access module according to claim 12, is characterized in that step 2) be specially:
2.1) monitor broadcast message or the descending control signaling that on initial time slot, base station equipment sends;
2.2) judge whether available free channel, if had, carry out step 3); If not, judge that whether timer is overtime, if timer is not overtime, repeating step 2.1), if timer expiry, access failure, finishes this access attempts.
The communication means of the frame structure of 14. multi-slots based on employing time division multiple access access module according to claim 13, is characterized in that, step 4) is specially:
4.1) on the corresponding descending time slot of ascending time slot with selecting, monitor descending control signaling;
4.2) judge whether to receive the link establishment order that base station equipment sends, if so, link establishment, and carry out step 5); If not, counter adds 1, and compares with the random access attempts number of times that default maximum allows; If counter is equal to or greater than the maximum random access attempts number of times allowing, access failure, finishes this access attempts; If counter is less than the maximum random access attempts number of times allowing, judge that whether timer is overtime, if timer is not overtime, repeating step 2.1), if timer expiry, access failure, finishes this access attempts.
15. communication meanss of frame structure based on adopting the multi-slots of time division multiple access access module according to claim 14, is characterized in that, the link establishment order described in step 4) comprises channel configuration indication, down channel and the up channel of indication configuration.
The communication means of the frame structure of 16. 1 kinds of multi-slots based on employing time division multiple access access module, it is characterized in that, configuration is based on adopting a pair of ascending time slot, descending time slot of frame structure of multi-slot of time division multiple access access module as for carrying up signaling channel, the downlink signaling channel of uplink and downlink control signal, and described method step is as follows:
1) Mobile Origination access, sends request for building link;
2) travelling carriage receives the request for building link response that base station equipment sends on downlink signaling channel;
3) in downlink signaling channel, the enterprising industry business of up signaling channel transmitting-receiving.
The communication means of the frame structure of 17. multi-slots based on employing time division multiple access access module according to claim 16, is characterized in that, step 1) is specially:
1.1) travelling carriage has service request;
1.2) access counter sets to 0;
1.3) on up signaling channel, send request for building link.
The communication means of the frame structure of 18. multi-slots based on employing time division multiple access access module according to claim 17, is characterized in that step 2) be specially:
2.1) monitor the descending control signaling on downlink signaling channel;
2.2) judge whether to receive the request for building link response that base station equipment sends, if so, link establishment, carries out step 3); If not, counter adds 1, and compares with the random access attempts number of times that default maximum allows; If counter is equal to or greater than the maximum random access attempts number of times allowing, access failure, finishes this access attempts; If counter is less than the maximum random access attempts number of times allowing, select at random the rollback value of rollback timer, and after rollback timer expiry, repeating step 1.3).
The communication means of the frame structure of 19. multi-slots based on employing time division multiple access access module according to claim 16, it is characterized in that, step 3) is specially: base station equipment is indicated channel configuration in setting up link request response message, the channel configuration that travelling carriage is indicated in setting up link request response message according to base station equipment, forwards the enterprising industry business of the channel transmitting-receiving of channel configuration indication to.
The method of the information type sending on the detection channel of the frame structure of 20. 1 kinds of multi-slots based on employing time division multiple access access module, it is characterized in that, configuration: when data segment transmission information type is business datum, the phase place of the first pilot is the first phase place, and the phase place of the second pilot is the second phase place; When data segment transmission information type is control signal, the phase place of the first pilot is third phase position, and the phase place of the second pilot is the 4th phase place;
Described method is specific as follows:
Receiving equipment detects the 3rd pilot, the 4th pilot receiving, and the 3rd described pilot is corresponding with the first pilot, and the phase place of the 3rd pilot is the 5th phase place, and the 4th pilot is corresponding with the second pilot, and the phase place of the 4th pilot is the 6th phase place;
If the 5th phase place equates with the first phase place, the 6th phase place equates with the second phase place simultaneously, and what the first data segment, the second data segment, the 3rd data segment carried is business datum;
If the 5th phase place equates with third phase position, the 6th phase place equates with the 4th phase place simultaneously, and what the first data segment, the second data segment, the 3rd data segment carried is control signal.
The method of the information type sending on the detection channel of the frame structure of 21. multi-slots based on employing time division multiple access access module according to claim 20, it is characterized in that, described method, further comprise: if the 5th phase place and the first phase place are not etc., the 6th phase place and the second phase place are not etc. simultaneously; Meanwhile, if the 5th phase place and third phase position are not etc., the 6th phase place and the 4th phase place not etc., do not detect mistake, the business datum of abandoning receiving simultaneously.
The method of the information type sending on the detection channel of the frame structure of 22. multi-slots based on employing time division multiple access access module according to claim 20, it is characterized in that, the first described phase place equates with the 4th phase place, and the second phase place equates with third phase position.
The method of the information type sending on the detection channel of the frame structure of 23. multi-slots based on employing time division multiple access access module according to claim 20, is characterized in that, described method is that the pilot on each time slot is detected.
The method of the information type sending on the detection channel of the frame structure of 24. multi-slots based on employing time division multiple access access module according to claim 20, is characterized in that, described business datum is voice, circuit data or grouped data.
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