CN102088306A - Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode - Google Patents
Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode Download PDFInfo
- Publication number
- CN102088306A CN102088306A CN2011100330633A CN201110033063A CN102088306A CN 102088306 A CN102088306 A CN 102088306A CN 2011100330633 A CN2011100330633 A CN 2011100330633A CN 201110033063 A CN201110033063 A CN 201110033063A CN 102088306 A CN102088306 A CN 102088306A
- Authority
- CN
- China
- Prior art keywords
- signal
- uplink pilot
- time slot
- time
- district
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses an uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode, belonging to the field of communication technology, comprising: in TDD mode, transmitting an uplink pilot signal from the time 2X from the starting point of an available uplink signal area to the time (2X+Wup) from the ending point when the available uplink signal area is greater than or equal to Wmin; transmitting a first uplink pilot signal from the starting point to a transmitting window 1 (2X+Wup) from the ending point when the available uplink signal area is smaller than Wmin and greater than or equal to (2X+Wup); transmitting a second uplink pilot signal in a transmitting window 2 which is 2X from the starting point and Wup from the ending point, wherein Wmin =Wup+4X; in the HFDD mode, transmitting an uplink pilot signal from the time 2X from the starting point of an available downlink signal area to the time (2X+Wup) from the ending point when the available downlink signal area is greater than or equal to Wmin; and transmitting an uplink pilot signal in the available downlink signal area or a signal frame when the available downlink signal area is smaller than Wmin. The invention is applied to a satellite communication system.
Description
Technical field
The present invention relates to communication technology of satellite, relate in particular to the sending method of initial uplink pilot signal in the satellite communication system of a kind of time division duplex (TDD) and frequency-time division duplex (HFDD) pattern, belong to communication technical field.
Background technology
Ascending pilot frequency is the important step that user terminal is gone into network process in the 3rd generation and the 4th generation tdd mode land mobile communication system synchronously.The 3rd generation tdd mode land mobile communication standard TD-SCDMA with and Long Term Evolution standard TD-LTE, all adopted the such special time slot of UpPTS to carry out the initial uplink pilot tone and sent.Wherein the frame structure of TD-SCDMA standard as shown in Figure 1.[3GPP?TS?25.221?V4.8.0(2005-06)“3rd?Generation?PartnershipProject；Technical?Specification?Group?Radio?Access?Network；Physical?channels?andmapping?of?transport?channels?onto?physical?channels(TDD)(Release?4)”]。
In satellite communication system, there is bigger star ground propagation delay time (for example, stationary orbit GEO satellite orbital altitude is about 36000 kilometers, and maximum single-hop round-trip delay has 270ms approximately) usually, as shown in Figure 2.In addition, also have bigger transmission time delay difference between each satellite user terminal, even in the wave beam covering radius is 200 kilometers system, the maximum transmitted delay inequality between each user terminal also may reach above about 1ms.The long time delay of satellite communication and long time delay difference characteristic have directly caused in satellite communication system adopting tdd mode as TD-SCDMA to transmit and have had certain degree of difficulty.
[Arif Ansari, et al., " S-WiMAX:Adaptation of IEEE 802.16e for Mobile SatelliteServices, " IEEE Communications Magazine, Jun.2009] analyzed the adaptability problem that in satellite mobile communication, adopts the WiMAX technology.When considering tdd mode (be actually half frequency division half and divide dual-mode), analyzed the adaptability problem of ground based terminal in the design of uplink and downlink frame, proposed a kind of solution that long enough guard time (greater than 2 times maximum transmitted delay inequality) is set at downlink frame and uplink frame afterbody with different propagation delay times.In fact, because upward signal has been increased extra guard time, caused the decline of frame structure efficient.
Similarly, in the satellite communication system of TDD mode and even frequency-time division duplex pattern, it also is infeasible directly sending ascending pilot frequency in the UpPTS time slot, must consider the corresponding Additional Protection time.In other words, if the maximum transmitted delay inequality in the supposition satellite beams scope is 2X, then may be because the initial incomprehensiveness of user terminal propagation delay time, the UpPTS uplink pilot signal can fall into a UpPTS time slot width and add in the time window of 2 times of maximum transmitted time delays when arriving satellite, therefore can not only receive in the UpPTS time slot of satellite side correspondence.Further and since the window time of advent of UpPTS signal exist with subframe structure in ascending time slot and the equitant possibility of descending time slot, therefore also need to carry out as the case may be corresponding displacement adjustment at the UpPTS of ground based terminal side signal sending time.
This displacement adjustment technology is similar to corresponding UpPTS Shifting technology in the TD-SCDMA mobile communication system of ground.Certainly, owing to the UpPTS Shifting technology that adopts in the land mobile communication system is in order to solve the solution of the UpPTS signal displacement that adjacent TD-SCDMA sub-district DwPTS down-bound pilot frequency signal takes the interference problem of the UpPTS uplink pilot signal of this sub-district, the UpPTS displacement technology that adopts in the satellite communication system then is in order to solve the problem that may maybe can't receive the overlapping interference of uplink and downlink business time-slot of satellite side that the long time delay difference between the different user terminals causes in the wave beam, and there is significant difference in corresponding two kinds of Processing Algorithm.
Summary of the invention
The objective of the invention is to overcome problems of the prior art, satellite communication system at time division duplex or frequency-time division duplex, a kind of sending method of initial uplink pilot signal is provided, to solve in the satellite communication because the upward signal that characteristics such as long delay and long delay difference are brought departs from and then the problem that causes uplink pilot signal to receive by common time slot position with respect to receiving slot.
The present invention at the time division duplex or the satellite communication system of frequency-time division duplex have structural relation between the specific transmitting-receiving transmission frame.Specifically, satellite is sent to ground based terminal with signal in its signal frame A, ground based terminal is sent to satellite by its signal frame B with signal after receiving signal, satellite then receives ground signal by another signal frame C, in the transmission signal frame A and received signal frame C of described satellite, the time difference between the corresponding ascending time slot group is the twice of intermediate conveyor time delay.As shown in Figure 3.
Fig. 4 shows the relation of the interior different propagation delay times of wave beam in the satellite communication system.Intermediate conveyor time delay wherein be defined as the interior maximum transmitted time delay of beam coverage and the mean value of minimum transfer time delay, and the difference of maximum transmitted time delay and minimum transfer time delay promptly is maximum transmitted delay inequality 2X.For engineering is used, usually adopt the propagation delay time of beam center point as the intermediate conveyor time delay, and get the higher value of the difference of maximum transmitted time delay to the difference of intermediate conveyor time delay and intermediate conveyor time delay to the minimum transfer time delay in the two, as half way maximum transmitted delay inequality X.
Specify the technical scheme that the present invention realizes that its technical purpose adopts below.
A. the uplink pilot signal sending method of a tdd mode satellite communication is characterized in that,
When the available upward signal district of signal frame is not less than Wmin, terminal selects any time to send uplink pilot signal in the moment of distance described available upward signal district starting point 2X begins send window till the moment of distance described available upward signal district's terminal point (2X+Wup);
The available upward signal district of signal frame is less than Wmin and when being not less than Wup+2X, and terminal in the send window 1 apart from terminal point (2X+Wup), selects any time to send first uplink pilot signal in the starting point in described available upward signal district; And at the starting point 2X in distance described available upward signal district in the send window 2 of distance terminal point Wup, select any time to send second uplink pilot signal;
Wmin=Wup+4X wherein, Wup represents the width of uplink pilot time slot, 2X represents the maximum transmitted delay inequality.
Preferably, in said method A, described signal frame is by 3 special time slots, and 6 business time-slots after being positioned at 1 preceding descending time slot of described special time slot and being positioned at described special time slot are formed; Described special time slot comprises descending pilot frequency time slot, protection interval and uplink pilot time slot; Described 6 business time-slots comprise one or more ascending time slots and one or more descending time slot.
Described available upward signal district can be by the protection in the described signal frame at interval, and uplink pilot time slot and 4 ascending time slots are formed; Perhaps by the protection in the described signal frame at interval, uplink pilot time slot and 3 ascending time slots are formed.
B. the uplink pilot signal sending method of HFDD pattern satellite communication is characterized in that,
When the available downstream signal district of signal frame is not less than Wmin, terminal selects any time to send uplink pilot signal in the moment of distance described available downstream signal district starting point 2X begins send window till the moment of distance described available downstream signal district's terminal point (2X+Wup);
The available downstream signal district of signal frame is during less than Wmin, and terminal selects any time to send uplink pilot signal in described available downstream signal district or in the signal frame.
Preferably, in said method B, described signal frame is by 3 special time slots, and 6 business time-slots after being positioned at 1 preceding descending time slot of described special time slot and being positioned at described special time slot are formed; Described special time slot comprises descending pilot frequency time slot, protection interval and uplink pilot time slot; Described 6 business time-slots comprise one or more ascending time slots and one or more descending time slot.
Described available downstream signal district can be by 1 descending time slot and the descending pilot frequency time slot of 3 descending time slots of the last signal frame in continuous two described signal frames and back one signal frame, and protection at interval and the uplink pilot time slot composition; Perhaps by 1 descending time slot and the descending pilot frequency time slot of 2 descending time slots of the last signal frame in continuous two described signal frames and back one signal frame, protection at interval and the uplink pilot time slot composition.
Below by the principle explanation technique scheme is further described.
The present invention is based on following imagination and realize:
Interior all user terminals of the satellite beams coverage all same position in signal frame send uplink pilot signal.
For this reason, for the user terminal with intermediate conveyor time delay, a certain position in signal frame sends uplink pilot signal; When this uplink pilot signal arrives the satellite side through an intermediate conveyor time delay, receiving uplink pilot signals on the same position of satellite receiver in the respective signal frame.Just in time differ 1 intermediate conveyor time delay between the respective signal frame of terminal and satellite both sides.
For user terminal, in signal frame separately, adopt the position identical to send uplink pilot signal with terminal with intermediate conveyor time delay with different propagation delay times; When the uplink pilot signal of each terminal arrives the satellite side, satellite receiver receives the uplink pilot signal that each terminal sends in a receiver window, then the width of this receiver window need satisfy following condition: the position when arriving the satellite-signal frame with the uplink pilot signal of terminal with intermediate conveyor time delay is the center, and the left and right sides has the width of 1 maximum transmitted time delay difference respectively; Be W 〉=Wmin=Wup+4X, wherein W represents the width of receiver window, and Wmin represents the minimum widith of receiver window, and Wup represents the width of uplink pilot time slot, and 4X represents the maximum transmitted delay inequality of twice.
A. at the time division duplex satellite communication system, also be that satellite side and end side all adopt time division duplex:
(1) if. the available upward signal district of signal frame is more than or equal to Wmin (promptly 2 times of maximum transmitted time delay differences add 1 uplink pilot time slot width), then begin in the moment of the available upward signal of distance district starting point 2X, arrive apart from the send window till the moment of available upward signal district's terminal point (2X+Wup), terminal can select any time to send uplink pilot signal, shown in Fig. 5 a;
(2) if. the available upward signal district of signal frame is less than Wmin, but more than or equal to Wup+2X (promptly 1 times of maximum transmitted delay inequality adds 1 uplink pilot time slot width), then the starting point in available upward signal district arrives in the send window 1 apart from terminal point (2X+Wup), and terminal can select any time to send first uplink pilot signal; Then at the starting point 2X in distance available upward signal district in the send window 2 of distance terminal point Wup, terminal can select any time to send second uplink pilot signal, shown in Fig. 5 b.
If available upward signal district can't satisfy above-mentioned two kinds of time width requirements certainly, then need to carry out system configuration again to satisfy one of above-mentioned condition.Need to prove that in addition available upward signal district can comprise the special time slot that is not used in the regular traffic transmission that those are associated together.
B. at the frequency-time division duplex satellite communication system, also be that the satellite side adopts the Frequency Division Duplexing (FDD) mode, and the uplink and downlink signals of end side still adopts the duplex mode of time-sharing receive and transmit(tsrt) when adopting two different frequent points respectively:
(1) if. the available downstream signal district of signal frame is more than or equal to Wmin (promptly 2 times of maximum transmitted time delay differences add 1 uplink pilot time slot width), then begin in the moment of the available downstream signal of distance district starting point 2X, arrive apart from the send window till the moment of available downstream signal district's terminal point (2X+Wup), terminal can select any time to send uplink pilot signal, shown in Fig. 6 a;
(2) if. the available downstream signal district of signal frame is less than Wmin, and then terminal selects any time to send uplink pilot signal in available downstream signal district; Perhaps terminal selects any time to begin to send uplink pilot signal in signal frame structure, shown in Fig. 6 b.
Need to prove that equally available downstream signal district can comprise the special time slot that is not used in the regular traffic transmission that those are associated together.
In sum, among the present invention at the satellite communication system of time division duplex or frequency-time division duplex mode, a kind of sending method of uplink pilot signal is provided, can solve position deviation and uncertain problem because of big propagation delay time of satellite communication and the uplink pilot signal arrival satellite that big transmission time delay difference brought, this concrete enforcement to time division duplex or frequency-time division duplex satellite communication system is very favorable.
Description of drawings
Fig. 1 is the frame structure schematic diagram of 3GPP tdd mode 1.28Mcps option (being TD-SCDMA);
Fig. 2 is the big propagation delay time schematic diagram that satellite communication has;
Fig. 3 is that the interframe under satellite communication time division duplex or the frequency-time division duplex concerns schematic diagram;
Fig. 4 is the schematic diagram of the different propagation delay times of satellite communication;
Fig. 5 is that the uplink pilot signal under the TDD mode of the present invention sends schematic diagram;
Fig. 6 is that the uplink pilot signal under the HFDD mode of the present invention sends schematic diagram;
Fig. 7 is that the time slot in the TD-SCDMA frame structure concerns schematic diagram in the specific embodiment;
Fig. 8 is that the TD-SCDMA frame uplink pilot signal transmission/reception of intermediate conveyor time delay terminal concerns schematic diagram;
Fig. 9 is that the TD-SCDMA frame uplink pilot signal transmission/reception of different propagation delay time terminals concerns schematic diagram;
Figure 10 is that the uplink pilot signal of up-downgoing business time-slot 4:2 configuration under the TDD mode sends schematic diagram;
Figure 11 is that the uplink pilot signal of up-downgoing business time-slot 3:3 configuration under the TDD mode sends schematic diagram;
Figure 12 is that the uplink pilot signal of up-downgoing business time-slot 3:3 configuration under the HFDD mode sends schematic diagram;
Figure 13 is that the uplink pilot signal of up-downgoing business time-slot 4:2 configuration under the HFDD mode sends schematic diagram.
Embodiment
In conjunction with the accompanying drawings the present invention is further described below by specific embodiment.
In the following embodiments, suppose that satellite adopts 109 wave beams to cover, the wave beam radius is about 200 kilometers, and the maximum transmitted delay inequality in a certain like this wave beam can reach 2X=1.26 millisecond (ms).
Adopt the subframe structure of TD-SCDMA standard to describe among the following embodiment, as shown in Figure 7, this subframe lengths is 5ms.Subframe comprises 7 regular traffic time slots altogether, and sequence number is respectively TS0-TS6, and each regular traffic time slot width is 675us; 3 special time slots are respectively descending pilot frequency time slot DwPTS (75us), protection GP (75us) and uplink pilot time slot UpPTS (125us) at interval.
The upward signal reception area of satellite side with the intermediate conveyor time delay in the wave beam as timing reference.For user terminal with intermediate conveyor time delay, assigned address in local current demand signal frame (supposition is at the section start of TS2 time slot) sends uplink pilot signal, when then this uplink pilot signal arrives the satellite side through an intermediate conveyor time delay (135ms), (i.e. the TS2 time slot original position of this signal frame) beginning receiving uplink pilot signals on the same position of satellite receiver in the respective signal frame.Just in time differ 1 intermediate conveyor time delay 135ms between the respective signal frame of terminal and satellite both sides.As shown in Figure 8.
Each user terminal that has different propagation delay times in the same satellite wave beam is in local current demand signal frame separately, adopt the position identical with the terminal with intermediate conveyor time delay to send uplink pilot signal, promptly the section start at the TS2 time slot carries out corresponding separately uplink pilot signal transmission.
Because user terminal be can not determine self usually to the propagation delay time between the satellite before networking, thereby have with respect to sending basic point ± uncertainty of 2X=± 1.26ms in satellite side joint receiving end.When each terminal uplink pilot signal arrives the satellite side, satellite receiver receives the uplink pilot signal that each terminal sends in a receiver window, this receiver window is the center with the uplink pilot signal width that begins 125us from satellite-signal frame TS2 section start, and the left and right sides has the width of 1 maximum transmitted time delay difference 1.26ms respectively.That is to say, need the receive window of a 125us+2 * 1.26ms=0.125ms+2.52ms=2.645ms in the satellite side at least.As shown in Figure 9.
At first consider under time division duplex (TDD) mode different ascending pilot frequency sending methods is arranged below according to different available upward signal district sizes.
The up-downgoing business time-slot that Figure 10 shows TS1-TS6 is configured to the situation of 4:2.At this moment; available upward signal district comprises that 4 normal time slots (TS1-TS4) add protection GP and uplink pilot time slot UpPTS at interval; its width is 4 * 0.675+0.075+0.125=2.9ms, the interval requirement of window during greater than 2 times of maximum transmitted delay inequalities and 1 uplink pilot time slot width sum 2.645ms wide substantially.Like this, can be at the starting point 1.26ms of distance GP, to apart from sending uplink pilot signal in the send window between the terminal point 1.385ms of TS4.For example can be placed on uplink pilot signal in the TS2 time slot apart from this 0.675-0.125=0.55ms position, time slot left side, then the left side in the described available upward signal of this uplink pilot signal distance zero hour district is 0.075+0.125+0.675+0.55=1.425ms＞2X=1.26ms, the right side in the described available upward signal of this uplink pilot signal distance finish time district is 2 * 0.675=1.35ms＞2X=1.26ms, thereby satisfies corresponding ascending pilot frequency transmission condition.
The up-downgoing business time-slot that Figure 11 shows TS1-TS6 is configured to the situation of 3:3.At this moment; available upward signal district comprises that 3 normal time slots (TS1-TS3) add protection GP and uplink pilot time slot UpPTS at interval; its width is 3 * 0.675+0.075+0.125=2.225ms; the interval requirement of window during less than 2 times of maximum transmitted delay inequalities and 1 uplink pilot time slot width sum 2.645ms wide substantially, but window interval requirement during greater than 1 times of maximum transmitted delay inequality and 1 uplink pilot time slot width sum 1.26+0.125=1.385ms narrow substantially.
Like this, can be placed on common uplink pilot time slot UpPTS place to uplink pilot signal earlier sends, this uplink pilot signal end is 3 * 0.675=2.025ms＞2X=1.26ms apart from the right side, can satisfy satellite all uplink pilot signal greater than the user of intermediate conveyor time delay are received requirement, and small part is less than the user's of intermediate conveyor time delay uplink pilot signal reception requirement.If user terminal is being specified in the stand-by period or is being failed to obtain the response of satellite after repeatedly repeating, illustrate that the uplink pilot signal of sending previously may fail to be received by satellite because of the relation of the reverse deviation of propagation delay time, therefore need send second uplink pilot signal at opposite time orientation.
Second uplink pilot signal can be placed on the place of the initial moment of TS3, left side, the available up district of distance is 0.075+0.125+2 * 0.675=1.55ms＞2X=1.26ms, satisfy satellite all uplink pilot signal less than the user of intermediate conveyor time delay are received requirement, and small part is greater than the user's of intermediate conveyor time delay uplink pilot signal reception requirement.
After repeatedly sending through two step uplink pilot signal like this, the uplink pilot signal of all terminals can be received by satellite side receiver basically in the wave beam.
Need to prove that if the available upward signal district in a certain wave beam can not satisfy the requirement in narrow substantially interval, the configuration adjustment that then needs to carry out business time-slot makes that this basic demand is satisfied.Only in this way could guarantee that uplink pilot signal is able to normal reception.
Embodiment 2
Secondly under frequency-time division duplex (HFDD) mode, according to different available downstream signal district sizes different ascending pilot frequency sending methods is arranged equally.In this manner, because the satellite side adopts the frequency different with transmission to receive, therefore can make full use of on this receptions frequency correspondence and between the clear area of descending time slot, carry out the reception of uplink pilot signal, also can avoid as far as possible or reduce interference normal uplink service time slot signal.
The up-downgoing business time-slot that Figure 12 shows TS1-TS6 is configured to the situation of 3:3.At this moment; available downstream signal district comprises that 4 normal time slots (TS0 of TS4-TS6, next signal frame) add descending pilot frequency time slot DwPTS, protection interval GP and the uplink pilot time slot UpPTS of next signal frame; its width is 4 * 0.675+2 * 0.075+0.125=2.975ms, the interval requirement of window during greater than 2 times of maximum transmitted delay inequalities and 1 uplink pilot time slot width sum 2.645ms wide substantially.Like this, the original position that can be simply uplink pilot signal be placed on the TS6 time slot sends, then this left side, uplink pilot signal distance available downstream signal district is 2 * 0.675=1.35ms＞2X=1.26ms, uplink pilot signal distance finish time right side, available downstream signal district is 2 * 0.675+2 * 0.075=1.5ms＞2X=1.26ms, thereby satisfies corresponding ascending pilot frequency transmission condition.
The up-downgoing business time-slot that Figure 13 shows TS1-TS6 is configured to the situation of 4:2.At this moment; available downstream signal district comprises that 3 normal time slots (TS0 of TS5-TS6 and next signal frame) add descending pilot frequency time slot DwPTS, protection interval GP and the uplink pilot time slot UpPTS of next signal frame; its width is 3 * 0.675+2 * 0.075+0.125=2.3ms, the interval requirement of window during less than 2 times of maximum transmitted delay inequalities and 1 uplink pilot time slot width sum 2.645ms wide substantially.Can't avoid of the interference of the interior part terminal of wave beam under this situation fully to signal in the uplink service time slot.Generally, can consider the appropriate location that uplink pilot signal is placed on available downstream signal district to be sent according to the distribution situation of user terminal in the wave beam.For simplicity, take uplink pilot signal is placed on the scheme that centre position, available downstream signal district sends, promptly the uplink pilot signal transmission is each side carried out in the position of 1.0875ms in the available downstream signal of distance district respectively in the uplink pilot signal two ends herein.
Certainly, also can consider to send the initial uplink pilot signal, but the upward signal just may arrive satellite to other users like this time produces some interference in any position of whole signal subspace frame structure.
Similarly, for satellite communication system, also can adopt identical uplink pilot signal to send and the reception strategy based on TD-LTE.
Though more than only be the present invention to be illustrated and illustrates with reference to particular specific embodiment; but any those of ordinary skill in the art are in disclosed technical scope; the form that may carry out the present invention and any modification on the details all should be included within protection scope of the present invention.
Claims (8)
1. the uplink pilot signal sending method of a tdd mode satellite communication is characterized in that,
When the available upward signal district of signal frame is not less than Wmin, terminal selects any time to send uplink pilot signal in the moment of distance described available upward signal district starting point 2X begins send window till the moment of distance described available upward signal district's terminal point (2X+Wup);
The available upward signal district of signal frame is less than Wmin and when being not less than Wup+2X, and terminal in the send window 1 apart from terminal point (2X+Wup), selects any time to send first uplink pilot signal in the starting point in described available upward signal district; And at the starting point 2X in distance described available upward signal district in the send window 2 of distance terminal point Wup, select any time to send second uplink pilot signal;
Wmin=Wup+4X wherein, Wup represents the width of uplink pilot time slot, 2X represents the maximum transmitted delay inequality.
2. the uplink pilot signal sending method of tdd mode satellite communication as claimed in claim 1, it is characterized in that, described signal frame is by 3 special time slots, and 6 business time-slots after being positioned at 1 preceding descending time slot of described special time slot and being positioned at described special time slot are formed; Described special time slot comprises descending pilot frequency time slot, protection interval and uplink pilot time slot; Described 6 business time-slots comprise one or more ascending time slots and one or more descending time slot.
3. the uplink pilot signal sending method of tdd mode satellite communication as claimed in claim 2 is characterized in that, described available upward signal district is by the interval of the protection in the described signal frame, and uplink pilot time slot and 4 ascending time slots are formed.
4. the uplink pilot signal sending method of tdd mode satellite communication as claimed in claim 2 is characterized in that, described available upward signal district is by the interval of the protection in the described signal frame, and uplink pilot time slot and 3 ascending time slots are formed.
5. the uplink pilot signal sending method of HFDD pattern satellite communication is characterized in that,
When the available downstream signal district of signal frame is not less than Wmin, terminal selects any time to send uplink pilot signal in the moment of distance described available downstream signal district starting point 2X begins send window till the moment of distance described available downstream signal district's terminal point (2X+Wup);
The available downstream signal district of signal frame is during less than Wmin, and terminal selects any time to send uplink pilot signal in described available downstream signal district or in the signal frame.
6. the uplink pilot signal sending method of HFDD pattern as claimed in claim 5 satellite communication, it is characterized in that, described signal frame is by 3 special time slots, and 6 business time-slots after being positioned at 1 preceding descending time slot of described special time slot and being positioned at described special time slot are formed; Described special time slot comprises descending pilot frequency time slot, protection interval and uplink pilot time slot; Described 6 business time-slots comprise one or more ascending time slots and one or more descending time slot.
7. the uplink pilot signal sending method of HFDD pattern as claimed in claim 6 satellite communication; it is characterized in that; described available downstream signal district is by 1 descending time slot and the descending pilot frequency time slot of 3 descending time slots of the last signal frame in continuous two described signal frames and back one signal frame, and protection at interval and the uplink pilot time slot composition.
8. the uplink pilot signal sending method of HFDD pattern as claimed in claim 6 satellite communication; it is characterized in that; described available downstream signal district is by 1 descending time slot and the descending pilot frequency time slot of 2 descending time slots of the last signal frame in continuous two described signal frames and back one signal frame, and protection at interval and the uplink pilot time slot composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100330633A CN102088306B (en) | 2010-07-15 | 2011-01-30 | Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010227431 | 2010-07-15 | ||
| CN201010227431.3 | 2010-07-15 | ||
| CN2011100330633A CN102088306B (en) | 2010-07-15 | 2011-01-30 | Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102088306A true CN102088306A (en) | 2011-06-08 |
| CN102088306B CN102088306B (en) | 2013-06-26 |
Family
ID=44099936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100330633A Expired - Fee Related CN102088306B (en) | 2010-07-15 | 2011-01-30 | Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102088306B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346829A (en) * | 2013-07-01 | 2013-10-09 | 北京大学 | Initial random access two-step delay measurement method for satellite communication compatible with LTE mode |
| CN107682074A (en) * | 2017-11-08 | 2018-02-09 | 南京天际易达通信技术有限公司 | A kind of compensation method of satellite uplink signal launch time, device and communication system |
| CN107852224A (en) * | 2015-07-02 | 2018-03-27 | 高通股份有限公司 | The method and apparatus of efficient data transfer in semi-duplex communication system with larger propagation delay |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404668A (en) * | 2000-11-17 | 2003-03-19 | 三星电子株式会社 | Apparatus and method for measuring propagation delay in an NB-TDD CDMA mobile communication system |
| CN101400146A (en) * | 2007-09-30 | 2009-04-01 | 大唐移动通信设备有限公司 | Method, apparatus and system for expanding coverage scope |
| CN101483915A (en) * | 2008-01-07 | 2009-07-15 | 三星电子株式会社 | Device and method for transmitting random access preamble signal |
| CN101499895A (en) * | 2008-02-01 | 2009-08-05 | 大唐移动通信设备有限公司 | Uplink scheduling method in time division duplex system |
| CN101562897A (en) * | 2008-04-18 | 2009-10-21 | 大唐移动通信设备有限公司 | Method for determining a random access leading sequence response transmit window as well as device and system thereof |
-
2011
- 2011-01-30 CN CN2011100330633A patent/CN102088306B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404668A (en) * | 2000-11-17 | 2003-03-19 | 三星电子株式会社 | Apparatus and method for measuring propagation delay in an NB-TDD CDMA mobile communication system |
| CN101400146A (en) * | 2007-09-30 | 2009-04-01 | 大唐移动通信设备有限公司 | Method, apparatus and system for expanding coverage scope |
| CN101483915A (en) * | 2008-01-07 | 2009-07-15 | 三星电子株式会社 | Device and method for transmitting random access preamble signal |
| CN101499895A (en) * | 2008-02-01 | 2009-08-05 | 大唐移动通信设备有限公司 | Uplink scheduling method in time division duplex system |
| CN101562897A (en) * | 2008-04-18 | 2009-10-21 | 大唐移动通信设备有限公司 | Method for determining a random access leading sequence response transmit window as well as device and system thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346829A (en) * | 2013-07-01 | 2013-10-09 | 北京大学 | Initial random access two-step delay measurement method for satellite communication compatible with LTE mode |
| CN103346829B (en) * | 2013-07-01 | 2016-04-20 | 北京大学 | Measurement method for satellite communication compatible with LTE mode initial random access two step time-delay measuring method |
| CN107852224A (en) * | 2015-07-02 | 2018-03-27 | 高通股份有限公司 | The method and apparatus of efficient data transfer in semi-duplex communication system with larger propagation delay |
| CN107852224B (en) * | 2015-07-02 | 2021-01-26 | 高通股份有限公司 | Method and apparatus for efficient data transmission in half-duplex communication system |
| CN107682074A (en) * | 2017-11-08 | 2018-02-09 | 南京天际易达通信技术有限公司 | A kind of compensation method of satellite uplink signal launch time, device and communication system |
| CN107682074B (en) * | 2017-11-08 | 2024-03-29 | 南京天际易达通信技术有限公司 | Satellite uplink signal transmitting time compensation method, device and communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102088306B (en) | 2013-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111095820B (en) | Wireless communication system, base station and user side equipment | |
| EP3562062B1 (en) | Method and apparatus for efficient data transmissions in half-duplex communication systems with large propagation delays | |
| CN107528628B (en) | Signal synchronization method, device and system of satellite communication system | |
| US5805576A (en) | Method and apparatus for TDMA wireless communication employing collector arrays for range extension | |
| US20070153734A1 (en) | Apparatus and method for transparent relay in multihop relay broadband wireless access (BWA) communication system | |
| CN101951286B (en) | Position zone-based time division duplex satellite communication uplink signal alignment method | |
| US8036137B2 (en) | Methods and apparatus for supporting a half-duplex mode of operation for user equipment communications in a radio communication system | |
| JP7460642B2 (en) | Control mechanism for random access procedures | |
| WO1997040639A9 (en) | Method and apparatus for tdma wireless communication employing collector arrays for range extension | |
| CN101895331B (en) | Time-division duplex communication method for satellite mobile communication | |
| KR20200128388A (en) | Bearer configuration for non-ground networks | |
| WO2022022601A1 (en) | Method for determining timing advance of terminal device, and communication apparatus | |
| US7466989B2 (en) | Synchronization method for terminal-to-terminal direct communication in time division duplex mobile communication system | |
| CN116097582A (en) | Transmission control method, device, equipment and storage medium | |
| CN102088306B (en) | Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode | |
| CN102064876B (en) | Time division duplex communication method of satellite user terminal | |
| EP2486747B1 (en) | Method and receiving node for measuring channel state information | |
| CN111315008A (en) | Communication time sequence setting method for control station and mobile station | |
| KR101349788B1 (en) | Apparatus and method communicating multi-frame data in multi-hop relay broadband wireless access communication system | |
| CN116614166A (en) | Hybrid MIMO over multiple multi-antenna satellites | |
| WO2022006766A1 (en) | System and method for transmission indications | |
| CN102075230B (en) | Time division duplex satellite communication method based on double-transmission-delay period super-frame structure | |
| JPH08279798A (en) | Mobile communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20200130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |