CN1394094A - Method for enlarging radius if society for GSM communication system - Google Patents
Method for enlarging radius if society for GSM communication system Download PDFInfo
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Abstract
The invention relates to the method for expanding radius of the subzone in GSM communication system. With the data being transmitted to the mobile station, the receiver and transmitter of the base station receives the data of the mobile station after the 3 time slots subtracting one seftorward of the fixed time. After 3 time slots of the receiver and transmitter of the base station transmitting the data to the mobile station, the two time slots are allotted to the channel of the relevant mobile station, which transmits the data to the receiver and transmitter of the base station through the up link. The receiving window of the receiver and transmitter of the base station is extended to relevant width of the two slots. The method breaks through the restriction of the time setforward in GSM system so as to expand the radius of the subzone.
Description
The present invention relates to Digital Cellular System field, the GSM whole world, especially a kind of gsm communication system enlarges the method for radius of society.
Wave point in the gsm system combines frequency division multiple access FDMA and two kinds of technology of time division multiple access TDMA.The unit that transmits on the wave point is the pulse train that more than 100 modulation bit formed, and is called " burst ".Burst takies the frequency bandwidth of 200kHz, and the duration is 0.577ms (15/26ms), as shown in Figure 1, claims that time and frequency window that it is shared are the slit.A lasting time of slit is called time slot, and the bandwidth that the slit is occupied is called crack frequently.Frequently the crack is equivalent to the radio-frequency channel in the GSM standard.
Frame is represented as n the slit that takes place in succession usually.N is taken as 8 in gsm system, and such frame is called time division multiplexing tdm A frame, and promptly a time division multiplexing tdm A frame is gone up adjacent slit by 8 times and formed.
, the burst sequence that in slit specific, that periodically occur, sends of physical channel.This cycle is 8 in gsm system, promptly is a tdma frame.We can say that also a radio-frequency channel comprises 8 physical channels.The sequence number that physical channel can occur in tdma frame with its slit is distinguished, and this sequence number is called timeslot number.A tdma frame duration 4.615ms (120/26ms) is made up of 8 time slots.A plurality of tdma frames constitute multi-frame, and its structure has two kinds, is respectively 26 multi-frames and 51 multi-frames.The cycle of 26 multi-frame structures is 120ms, contains 26 tdma frames, is used for Traffic Channel and associated control channel thereof.The cycle of 51 multi-frame structures is 3060/13ms, contains 51 tdma frames, is used for control channel.
Physical channel is the combination of frequency division and time-division, and it is made up of the slit flow between base station and the travelling carriage.
In gsm system, up link is meant the link from travelling carriage to the base station direction, and down link is meant from the base station to the link of travelling carriage direction.For travelling carriage, if can avoid the requirement that transmits and receives simultaneously, be very favourable to its realization: the receiver of a travelling carriage need not its transmitter is protected, thereby can reduce the volume of travelling carriage greatly.For realizing this point, in gsm system, the tdma frame of up link always lags behind 3 time slots of tdma frame (about 1730 microseconds) of down link.In the base station, this delay is fixed, but it seems from travelling carriage, and problem is a bit different: because the mobility of travelling carriage, it always has certain transmission delay to the base station of Serving cell, and this transmission delay is not generally fixed.In order to remedy the transmission delay of travelling to and fro between the base station, the emission of travelling carriage must have certain shifting to an earlier date, and this is called the timing advance of travelling carriage.The scope of timing advance TA is 0-233 microsecond (this restriction comes from the time domain specification of access burst pulse).So the up link of seeing from travelling carriage and the precision offset of down link are that 3 time slots deduct Timing Advance.Travelling carriage under the dedicated mode must use suitable Timing Advance emission constantly, otherwise will lose synchronously with the base station.
In gsm system, stipulate that a time slot is 577 microseconds, transmit the burst that has the 156.25bit data.When travelling carriage is by sending the access burst pulse on Random Access Channel RACH at random during access network, the concrete form of access burst pulse as shown in Figure 2.
By the form of access burst pulse as can be seen; because there is 63bit (3bit tail bit the information bit back; 60bit extended protection bit) redundant bit; then there is the restriction of 63bit in domain time ahead account at wireless mouth; promptly spatially there is the restriction (because signal is with light velocity propagation, 63 * 577 * 1.0E-6 ÷, 156.25 * 3 * 1.0E5 ÷ 2=35km) of 35km.That is to say that when the covering radius of sub-district surpassed 35km, signal delay will surpass the duration of the maximum 63bit correspondence of GSM regulation and stipulation.If a travelling carriage has arrived the edge of conventional covering radius, it will be launched with the maximum time lead TA value that system allows; If it is peripheral mobile that travelling carriage continues to the sub-district, because Timing Advance has arrived maximum, system can not continue that Timing Advance TA value is carried out self adaptation and regulate, and the signal of travelling carriage emission will arrive base station receiver at next time slot, can't solve.
Because there is the restriction of 63bit in the Timing Advance of GSM, make the radius of a sub-district can not surpass 35km at present.In most of the cases be enough to use, but for some specific application scenario, such as the very rare area that distributes for mobile subscribers such as island, deserts, if still adopting this radius is the sub-district of 35km, then each sub-district has user seldom, often need to remove to set up a website, so just seem very uneconomical for seldom user.At this moment have the requirement that covers above 35km, this moment, present system just can not satisfy these demands.
The object of the present invention is to provide a kind of gsm communication system to enlarge the method for radius of society, it can exist at the Timing Advance of GSM under the condition of restriction of 63bit, and the radius of sub-district is expanded to more than the 35km.
For achieving the above object, solution of the present invention is: a kind of gsm communication system enlarges the method for radius of society, lag behind in the gsm communication system of 3 time slots of time division multiplexing frame of the down link from the base station transceiver to the travelling carriage at the time division multiplexing frame of the up link from the travelling carriage to the base station transceiver
A, base station transceiver by down link after travelling carriage emission data, deduct time of a Timing Advance through 3 time slots, travelling carriage is launched data by up link to base station transceiver;
B, at base station transceiver after 3 time slots of travelling carriage emission data, for corresponding mobile station is specified 2 time slots by up link to the channel of base station transceiver emission data;
The width of receive window respective extension to 2 time slot of C, base station transceiver.
In steps A, travelling carriage can be according to Timing Advance and travelling carriage to the described Timing Advance of proportional relation dynamic calculation between the distance of base station transceiver, it is to arrive 2 times of distances of base station transceiver divided by the light velocity with travelling carriage, calculate travelling carriage to the time delay between the base station transceiver, by time slot 577 microseconds, draw Timing Advance.
In steps A, travelling carriage can compare the maximum time lead that Timing Advance and GSM allowed that obtains, when the Timing Advance that obtains greater than GSM allowed maximum time during lead, with GSM was allowed maximum time lead as the described Timing Advance of steps A, when the Timing Advance that obtains less than GSM allowed maximum time during lead, with the Timing Advance that obtains as the described Timing Advance of steps A.
In addition, the invention allows for another solution: a kind of gsm communication system enlarges the method for radius of society, lag behind in the gsm communication system of 3 time slots of time division multiplexing frame of the down link from the base station transceiver to the travelling carriage at the time division multiplexing frame of the up link from the travelling carriage to the base station transceiver
A, base station transceiver by down link after travelling carriage emission data, deduct time of a Timing Advance through 3 time slots, travelling carriage is launched data by up link to base station transceiver;
B, at base station transceiver after 3 time slots of travelling carriage emission data, for corresponding mobile station is specified 3 time slots by up link to the channel of base station transceiver emission data, with last 2 time slot free time of every time division multiplexing frame need not;
The width of receive window respective extension to 3 time slot of C, base station transceiver.
In steps A, travelling carriage can be according to Timing Advance and travelling carriage to the described Timing Advance of proportional relation dynamic calculation between the distance of base station transceiver, it is to arrive 2 times of distances of base station transceiver divided by the light velocity with travelling carriage, calculate travelling carriage to the time delay between the base station transceiver, by time slot 577 microseconds, draw Timing Advance.
In steps A, travelling carriage can compare the maximum time lead that Timing Advance and GSM allowed that obtains, when the Timing Advance that obtains greater than GSM allowed maximum time during lead, with GSM was allowed maximum time lead as the described Timing Advance of steps A, when the Timing Advance that obtains less than GSM allowed maximum time during lead, with the Timing Advance that obtains as the described Timing Advance of steps A.
In addition, the invention allows for another kind of solution: a kind of gsm communication system enlarges the method for radius of society, lag behind in the gsm communication system of 3 time slots of time division multiplexing frame of the down link from the base station transceiver to the travelling carriage at the time division multiplexing frame of the up link from the travelling carriage to the base station transceiver
A, base station transceiver by down link after travelling carriage emission data, deduct time of a Timing Advance through 3 time slots, travelling carriage is launched data by up link to base station transceiver;
B, travelling carriage are constantly monitored travelling carriage to the distance between the base station transceiver, and report a comparison module in the base station controller by base station transceiver, this comparison module is the relation between this distance and conventional radius of society 35 kms relatively, and comparative result exported to a central processing module, this central processing module sends order to Executive Module according to the result of this comparison, when comparative result when being this distance less than conventional radius of society 35 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 1 time slot by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 1 time slot by the receive window of Executive Module base station transceiver;
When comparative result when being this distance greater than conventional radius of society 35 kms less than 2 times of conventional radius of society 70 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 2 time slots by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 2 time slots by the receive window of Executive Module base station transceiver;
When comparative result when being this distance greater than 2 times of conventional radius of society 70 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 3 time slots by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 3 time slots by the receive window of Executive Module base station transceiver;
When a remaining time slot of time division multiplexing frame when being next corresponding mobile station inadequately by up link to the timeslot number of the channel appointment of base station transceiver emission data, the remaining time slot of this time division multiplexing frame is on the shelf.
The effect that the present invention brings is such: when travelling carriage has surpassed conventional radius and is the edge of 35km, it is launched with the maximum time lead that system allows, and travelling carriage has been when having surpassed conventional radius and being the edge of 35km, the Timing Advance that its real Timing Advance allows greater than this system.Timing Advance when travelling carriage sends like this is not enough, cause base station transceiver when receiving data, to pass through the relevant base station transceiver after 3 time slots of travelling carriage emission data, the next time slot of the time slot that causes these data to spill into distributing to it, produce aliasing with the related data of next other travelling carriage of time slot, because the present invention specifies 2 or 3 time slots by up link to base station transceiver emission data to travelling carriage emission data and corresponding mobile station by down link to base station transceiver each time, like this, even these data spill into next time slot, next time slot remains that this travelling carriage takies.Like this, just solved under the condition that does not change GSM maximum time lead, still can make the radius of sub-district expand the above problem of 35km to.
Fig. 1 is the burst schematic diagram that the gsm wireless interface is adopted.
Fig. 2 is the concrete format chart of the burst that adopted of gsm wireless interface.
Fig. 3 is the method flow diagram that first kind of scheme gsm communication system of the present invention enlarges radius of society.
Fig. 4 is the distribution schematic diagram of time division multiplexing frame in the prior art.
Fig. 5 is the distribution schematic diagram of first kind of scheme time division multiplexing of the present invention frame.
Fig. 6 is the distribution schematic diagram of second kind of scheme time division multiplexing of the present invention frame.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 3 is the method flow diagram that first kind of scheme gsm communication system of the present invention enlarges radius of society.In this flow chart, the step of its realization as can be seen.
In gsm system, the tdma frame of the up link from the travelling carriage to the base station transceiver always lags behind 3 time slots of tdma frame (about 1730 microseconds) of corresponding down link from the base station transceiver to the travelling carriage, as shown in Figure 4.Fig. 4 shows a tdma frame, and this tdma frame has 8 time slots, and label is 0,1,2 respectively ... 7.Wherein, time slot 0 is used for to travelling carriage 11 emission data, and time slot 3 is used for the data of base station transceiver receiving mobile 11.At base station transceiver, this delay is fixed, but it seems from travelling carriage, because the mobility of travelling carriage, it always has certain transmission delay to the base station of Serving cell, and this transmission delay is not generally fixed.In order to remedy the transmission delay of travelling to and fro between the base station, the emission of travelling carriage must have a Timing Advance.By shown in Figure 2, by the form of access burst pulse as can be seen, the redundant bit of 63bit is arranged in the information bit back.And in gsm system, stipulate that a time slot is 577 microseconds, transmit the burst that has the 156.25bit data.Therefore the maximum that can calculate Timing Advance is (577/156.25) * 63=233 (microsecond).Therefore, the scope of timing advance TA is the 0-233 microsecond.The up link of seeing from travelling carriage and the precision offset of down link are that 3 time slots deduct Timing Advance.Travelling carriage under the dedicated mode must calculate suitable Timing Advance emission constantly, otherwise will lose synchronously with the base station.
So, how to calculate this Timing Advance and be which numerical value in the 0-233 microsecond?
Travelling carriage according to Timing Advance and travelling carriage to the described Timing Advance of proportional relation dynamic calculation between the distance of base station transceiver, it is to arrive 2 times of distances of base station transceiver divided by the light velocity with travelling carriage, calculate travelling carriage to the time delay between the base station transceiver, by time slot 577 microseconds, draw Timing Advance and this lead and account for how many time slots.Detecting travelling carriage such as, travelling carriage is 7km to the distance of base station transceiver.Then
Timing Advance=7 * 2/ (3 * 1.0E5) * 1.0E6=46.7 (microsecond)
Timing Advance accounts for time slot=46.7/577=0.08
That is to say, the travelling carriage 11 in Fig. 4, from time slot 3 about 0.08 time slot, i.e. 2.92 time slot places, travelling carriage will be sent out data to base station transceiver.
But, be 42km if travelling carriage detects travelling carriage to the distance of base station transceiver, exceeded the edge of conventional covering radius 35km, then
Timing Advance=42 * 2/ (3 * 1.0E5) * 1.0E6=279.7 (microsecond)
This Timing Advance is greater than the maximum time lead that GSM allowed, i.e. 63bit time corresponding lead 233 microseconds, with GSM was allowed maximum time lead 233 microseconds as Timing Advance,
Timing Advance accounts for time slot=233/577=0.40
That is to say, the travelling carriage 11 in Fig. 4, from time slot 3 about 0.40 time slot, i.e. 2.60 time slot places, travelling carriage will be sent out data to base station transceiver.
And Timing Advance should account for time slot=279.7/577=0.48
That is to say, concerning travelling carriage 11, should be from time slot 3 about 0.48 time slot, i.e. 2.52 time slot places, travelling carriage just should be sent out data to base station transceiver, but 0.08 time slot that in fact sent data evenings, like this, at the 3.08th time slot place, base station transceiver just begins to receive data, and data just may just receive at the 4.08th time slot place like this.And the 4th time slot distributed to other travelling carriage.Like this, just there is the problem of a data aliasing at the 4th time slot preceding 0.08 second, makes at the 4th time slot preceding 0.08 second, and data can't solve.
In the solution of the present invention, after 3 time slots of travelling carriage emission data, launch 2 time slots of channel appointment of data to base station transceiver by up link for corresponding mobile station at base station transceiver; The width of receive window respective extension to 2 time slot of base station transceiver, as shown in Figure 5.That is to say that in Fig. 5, time slot 0,1 is used for finishing base station transceiver and sends data to travelling carriage 11, corresponding time slot 3,4 is used for finishing the data that the base station transceiver receiving mobile is sent.Like this, describedly in the above overflow under the situation of 0.08 time slot, belong to travelling carriage 11, then can not produce any data aliasing because the 4th time slot remains to the 4th time slot.Like this, Timing Advance can expand to that GSM allows maximum time 2 times of lead, i.e. 466 microseconds, radius of society is then also corresponding expands as 2 times.
In the present embodiment, send data to travelling carriage, in the data of strange time slot base station transceiver receiving mobile at even time slot base station transceiver.All distribute to up link and down link simultaneously for each time slot, only distribute to up link and down link that different mobile stations takies.Time slot 0,1 is used for base station transceiver and sends data to travelling carriage 11, and time slot 2,3 is used for base station transceiver and sends data to travelling carriage 22, and time slot 4,5 is used for base station transceiver and sends data to travelling carriage 33, or the like.Simultaneously, time slot 3,4 is used for the data of base station transceiver receiving mobile 11, and time slot 5,6 is used for the data of base station transceiver receiving mobile 22, or the like.To a certain particular time-slot, as time slot 3, both data of receiving mobile 11 are transmitted into the data of travelling carriage 22 simultaneously again.
In alternative dispensing means of the present invention, for base station transceiver is each time specified 3 time slots by down link to travelling carriage emission data, after 3 time slots of travelling carriage emission data, launch 3 time slots of channel appointment of data at base station transceiver to base station transceiver by up link for corresponding mobile station; The width of receive window respective extension to 3 time slot of base station transceiver, as shown in Figure 6.That is to say that in Fig. 6, time slot 0,1,2 is used for finishing base station transceiver and sends data to travelling carriage 11, corresponding time slot 3,4,5 is used for finishing the data that base station transceiver receiving mobile 11 is sent.Like this, describedly in the above overflow under the situation of 0.08 time slot, belong to travelling carriage 11, then can not produce any data aliasing because the 4th time slot remains to the 4th time slot.Like this, Timing Advance can expand to that GSM allows maximum time 3 times of lead, i.e. 699 microseconds, radius of society is then also corresponding expands as 3 times.But in this scheme, each time division multiplexing frame latter two time slot free time need not.
In this scheme, time slot 0,1,2 is used for base station transceiver and sends data to travelling carriage 11, and time slot 3,4,5 is used for base station transceiver and sends data to travelling carriage 22, and 6,7 free time of time slot need not.Simultaneously, time slot 3,4,5 is used for the data of base station transceiver receiving mobile 11.To a certain particular time-slot, as time slot 3, both data of receiving mobile 11 are transmitted into the data of travelling carriage 22 simultaneously again.
In another possibility of the present invention, travelling carriage is constantly monitored travelling carriage to the distance between the base station transceiver, and report a comparison module in the base station controller by base station transceiver, this comparison module is the relation between this distance and conventional radius of society 35 kms relatively, and comparative result exported to a central processing module, this central processing module sends order to Executive Module according to the result of this comparison, when comparative result when being this distance less than conventional radius of society 35 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 1 time slot by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 1 time slot by the receive window of Executive Module base station transceiver;
When comparative result when being this distance greater than conventional radius of society 35 kms less than 2 times of conventional radius of society 70 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 2 time slots by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 2 time slots by the receive window of Executive Module base station transceiver;
When comparative result when being this distance greater than 2 times of conventional radius of society 70 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 3 time slots by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 3 time slots by the receive window of Executive Module base station transceiver;
When a remaining time slot of time division multiplexing frame when being next corresponding mobile station inadequately by up link to the timeslot number of the channel appointment of base station transceiver emission data, the remaining time slot of this time division multiplexing frame is on the shelf.
Detecting travelling carriage such as, travelling carriage is 7km to the distance of base station transceiver.
Travelling carriage will this distance reports a comparison module in the base station controller by base station transceiver, this comparison module compares with conventional radius of society 35km this distance, because 7km is less than 35km, then this comparative result is outputed to central processing module, can be provided with in this central processing module such as a case statement, when less than 35km, call Executive Module time slot 0 is distributed to base station transceiver to travelling carriage 11 transmission data, time slot 3 is distributed to the data of base station transceiver receiving mobile 11, and the receive window of base station transceiver is set to the width of 1 time slot simultaneously.
Suppose that it is 42km to the distance of base station transceiver that travelling carriage detects travelling carriage, the edge that has exceeded conventional covering radius 35km, but less than 70km, then comparison module outputs to central processing module with comparative result, in the case statement section of central processing module, seek greater than the situation of 35km less than 70km, then central processing module by Executive Module with time slot 0,1 distributes to base station transceiver sends data to travelling carriage 11, time slot 3,4 distribute to the data of base station transceiver receiving mobile 11, and the receive window of base station transceiver is set to the width of 2 time slots simultaneously.
Suppose that it is 77km to the distance of base station transceiver that travelling carriage detects travelling carriage, 2 times of conventional covering radius 35km have been exceeded, then comparison module outputs to central processing module with comparative result, in the case statement section of central processing module, seek situation greater than 70km, then central processing module is distributed to base station transceiver by Executive Module with time slot 0,1,2 and is sent data to travelling carriage 11, time slot 3,4,5 is distributed to the data of base station transceiver receiving mobile 11, and the receive window of base station transceiver is set to the width of 3 time slots simultaneously.
Like this, the present invention just provides a kind of method that breaks through the restriction Extended Cell radius of gsm system Timing Advance.
Claims (7)
1, a kind of gsm communication system enlarges the method for radius of society, lag behind in the gsm communication system of 3 time slots of time division multiplexing frame of the down link from the base station transceiver to the travelling carriage at the time division multiplexing frame of the up link from the travelling carriage to the base station transceiver,
A, base station transceiver by down link after travelling carriage emission data, deduct time of a Timing Advance through 3 time slots, travelling carriage is launched data by up link to base station transceiver;
B, at base station transceiver after 3 time slots of travelling carriage emission data, for corresponding mobile station is specified 2 time slots by up link to the channel of base station transceiver emission data;
The width of receive window respective extension to 2 time slot of C, base station transceiver.
2, gsm communication system according to claim 1 enlarges the method for radius of society, it is characterized in that: in steps A, travelling carriage according to Timing Advance and travelling carriage to the described Timing Advance of proportional relation dynamic calculation between the distance of base station transceiver, it is to arrive 2 times of distances of base station transceiver divided by the light velocity with travelling carriage, calculate travelling carriage to the time delay between the base station transceiver, draw Timing Advance.
3, gsm communication system according to claim 1 and 2 enlarges the method for radius of society, it is characterized in that: in steps A, travelling carriage compares the maximum time lead that Timing Advance and GSM allowed that obtains, when the Timing Advance that obtains greater than GSM allowed maximum time during lead, with GSM was allowed maximum time lead as the described Timing Advance of steps A, when the Timing Advance that obtains less than GSM allowed maximum time during lead, with the Timing Advance that obtains as the described Timing Advance of steps A.
4, a kind of gsm communication system enlarges the method for radius of society, lag behind in the gsm communication system of 3 time slots of time division multiplexing frame of the down link from the base station transceiver to the travelling carriage at the time division multiplexing frame of the up link from the travelling carriage to the base station transceiver,
A, base station transceiver by down link after travelling carriage emission data, deduct time of a Timing Advance through 3 time slots, travelling carriage is launched data by up link to base station transceiver;
B, at base station transceiver after 3 time slots of travelling carriage emission data, for corresponding mobile station is specified 3 time slots by up link to the channel of base station transceiver emission data, with last 2 time slot free time of every time division multiplexing frame need not;
The width of receive window respective extension to 3 time slot of C, base station transceiver.
5, gsm communication system according to claim 4 enlarges the method for radius of society, it is characterized in that: in steps A, travelling carriage according to Timing Advance and travelling carriage to the described Timing Advance of proportional relation dynamic calculation between the distance of base station transceiver, it is to arrive 2 times of distances of base station transceiver divided by the light velocity with travelling carriage, calculate travelling carriage to the time delay between the base station transceiver, draw Timing Advance.
6, enlarge the method for radius of societies according to claim 4 or 5 described gsm communication systems, it is characterized in that: in steps A, travelling carriage compares the maximum time lead that Timing Advance and GSM allowed that obtains, when the Timing Advance that obtains greater than GSM allowed maximum time during lead, with GSM was allowed maximum time lead as the described Timing Advance of steps A, when the Timing Advance that obtains less than GSM allowed maximum time during lead, with the Timing Advance that obtains as the described Timing Advance of steps A.
7, a kind of gsm communication system enlarges the method for radius of society, lag behind in the gsm communication system of 3 time slots of time division multiplexing frame of the down link from the base station transceiver to the travelling carriage at the time division multiplexing frame of the up link from the travelling carriage to the base station transceiver,
A, base station transceiver by down link after travelling carriage emission data, deduct time of a Timing Advance through 3 time slots, travelling carriage is launched data by up link to base station transceiver;
B, travelling carriage are constantly monitored travelling carriage to the distance between the base station transceiver, and report a comparison module in the base station controller by base station transceiver, this comparison module is the relation between this distance and conventional radius of society 35 kms relatively, and comparative result exported to a central processing module, this central processing module sends order to Executive Module according to the result of this comparison, when comparative result when being this distance less than conventional radius of society 35 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 1 time slot by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 1 time slot by the receive window of Executive Module base station transceiver;
When comparative result when being this distance greater than conventional radius of society 35 kms less than 2 times of conventional radius of society 70 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 2 time slots by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 2 time slots by the receive window of Executive Module base station transceiver;
When comparative result when being this distance greater than 2 times of conventional radius of society 70 kms
A, at base station transceiver after 3 time slots of travelling carriage emission data, central processing module is that corresponding mobile station is specified 3 time slots by up link to the channel of base station transceiver emission data by Executive Module;
B, central processing module are set to the width of 3 time slots by the receive window of Executive Module base station transceiver;
When a remaining time slot of time division multiplexing frame when being next corresponding mobile station inadequately by up link to the timeslot number of the channel appointment of base station transceiver emission data, the remaining time slot of this time division multiplexing frame is on the shelf.
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| CN100450242C (en) * | 2006-04-30 | 2009-01-07 | 华为技术有限公司 | Uplink signal transmission method |
| CN102202352A (en) * | 2011-03-31 | 2011-09-28 | 上海华为技术有限公司 | Data transmission method and equipment |
| CN101399587B (en) * | 2007-09-25 | 2012-08-29 | 展讯通信（上海）有限公司 | Base station transmission method and device in communication system |
| WO2013185674A1 (en) * | 2012-07-23 | 2013-12-19 | 中兴通讯股份有限公司 | Random access method and receiver |
| WO2014086214A1 (en) * | 2012-12-04 | 2014-06-12 | 中兴通讯股份有限公司 | Method and system for implementing rach synchronism |
| CN109996255A (en) * | 2017-12-29 | 2019-07-09 | 中国移动通信集团湖北有限公司 | Stealthy user optimization method, apparatus calculates equipment and storage medium |
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2001
- 2001-06-29 CN CN 01118900 patent/CN1129333C/en not_active Ceased
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450242C (en) * | 2006-04-30 | 2009-01-07 | 华为技术有限公司 | Uplink signal transmission method |
| CN101399587B (en) * | 2007-09-25 | 2012-08-29 | 展讯通信（上海）有限公司 | Base station transmission method and device in communication system |
| CN102202352A (en) * | 2011-03-31 | 2011-09-28 | 上海华为技术有限公司 | Data transmission method and equipment |
| WO2013185674A1 (en) * | 2012-07-23 | 2013-12-19 | 中兴通讯股份有限公司 | Random access method and receiver |
| CN103582151A (en) * | 2012-07-23 | 2014-02-12 | 中兴通讯股份有限公司 | Random access method and receiver |
| US9426829B2 (en) | 2012-07-23 | 2016-08-23 | Zte Corporation | Random access method and receiver |
| WO2014086214A1 (en) * | 2012-12-04 | 2014-06-12 | 中兴通讯股份有限公司 | Method and system for implementing rach synchronism |
| CN109996255A (en) * | 2017-12-29 | 2019-07-09 | 中国移动通信集团湖北有限公司 | Stealthy user optimization method, apparatus calculates equipment and storage medium |
| CN109996255B (en) * | 2017-12-29 | 2022-09-16 | 中国移动通信集团湖北有限公司 | Invisible user optimization method and device, computing equipment and storage medium |
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| Publication number | Publication date |
|---|---|
| CN1129333C (en) | 2003-11-26 |
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