JPS6342246A - Mulple address communication system - Google Patents

Abstract

PURPOSE:To decrease a loss time by accumulating an ACK NACK signal from each receiving station, and determining the transmission sequence of a broadcast signal to be retransmitted, based on the total number of the NACK signal. CONSTITUTION:At the time of transmitting continuously all of a series of multiple address signals to be transmitted by a transmitting station 11, with respect to each multiple address signal thereof, all the ACK/NACK signals that are sent back from each receiving station 12-14 are accumulated in the memory device of the transmitting station. From these accumulated ACK/NACK signals, the total number of the NACK signal is derived at every receiving station, and multiple address signal is retransmitted successively in order of the receiving station in which said total number is small. As a result, it does not occur that the transmission of a signal to be transmitted originally is delayed due to a frequency retransmission processing executed to some receiving stations in which a line becomes a failure temporarily. Also, the retransmission processing to the receiving station whose line is good can be completed in a short time.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to a broadcast communication system.

(Prior Art) In general, the selective reject method is often used as a retransmission correction method for point-to-point, point-to-point, and point communication systems. too.

This selective reject method is often used, and the retransmission correction method here refers to the retransmission correction method in which the receiving station determines that there is an error in the received data block and sends a NACK signal to the transmitting station. The station then sends the data block again.

By repeating this process until the data block is received without error, the correct data block can be received.

The selective reject method is one of the retransmission correction methods described above.
CK/N,'l CX<Good money wait! ? A series of transmissions (all transmissions 1-tNAcK)
When the erroneous data clock signal (f Ah, 741 +fJ (M system/J, 1 frame, 1/reject reject method)
A CK credit (Zukaku, reception is Gani data block, -・
Even from the station, the NACK number is returned and the target of all e1 floors of the r♂ pump is -No.

1- However, using the Liu Ege satellite line / 2- ``Considering that the satellite link was used for the system, it was assumed that there would be rain (therefore, some of the When the station becomes the receiving line Kooka 1 and returns all the signals to NA c2, the remaining multi-X stations return -A c,, r K signal j, and even if they come back, there is only one word. The station (2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 5).
ft < L If the line continues to be faulty for a while, the 5 broadcast signal will be retransmitted frequently.j:i fl-
, b /i Tsume, 15 To the end of the book t4% must be a series of times.
Man ff, ii Gin all the training completed - I - Otsu's (Koto big [Os time;, ga cow 1 -/,.

? -, ()) 'li: 'I'3, -' f\iz
”!h N A (,: K 11 '< gold iyz
i;”N l,, 1 'v'z fx i, Uke 4g
Circular 7'lE l A rich reception to the station' Ko・imo 1, -
=・Taku's same (noisy 5 clouds all: 1 of the people who are stupid to buy it)
On top of this, ;pi's loss fit is raw 1:, Teshibuki (1), the signal's knowledge effect is 7゛P4 (,, 7 = when is it a problem? Solution 1, ``: Problems that occur)?-'s 1 ir,, C5'73 times
:5 i, 7) fl-,,,”:) E Mutsu; 10 tatami mats 1
．． (1) 」る ス ス ス ス ス〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕〕 , So) 1 (Accordingly, the receiving station 'C' where the same person likes the office is also - Hen Jun) -) 1 River) 1 I feel sorry for; - All of the -
2゜Complete the Shin (July Jin Graduation Furuno: Lost Tai/, Gai 1), the Shin is 5, the Shin effect is sad 11, 1m apart,
)color.

The present invention ID and 't! a 11m S ;14. ;
4 ; :jl,, fil 'b, so 41 云tjf
% reason (this, 1:su,, originally it was sent, ru behe 1 zashi 5's 'i'<4'a becomes 31) and it's ``V'' and I don't have money.
1. ,, , times vjA is good. I'l Ba little, I pray! - 61 lines 1 report ia, Pr ``Providing 4 quintillion yen systems'' is the overall purpose, 66. ) Transmitted by the transmitting station 2) When transmitting all of the broadcast signals of jQ to the delayed target E, the broadcast signal of the valley 1g is zoomed in, ↑, and returned from each receiving station. Come ACK/N
A (: Records of all K-signal 8 transmitting stations (yf) have all accumulated 1. This accumulation (-6 A e K / N
A (', K NA for each old station when the signal goes out
Find the number of CK signals? −′, Noki! A to K
Total number of signals (Internal transmission of broadcast signals to be retransmitted 111t)
The present invention is characterized by the fact that the 114th retransmission of the broadcast signal FFI is carried out in accordance with the present invention. Solve the above problem (1).

(Function) A series of broadcast signals to be sent by the transmitting station are all sent from the metal body η, mo1~, and each of the seven broadcast signals is returned from the N9 broadcasting station. The signal 4'1C is all accumulated at the transmitting station. IC J: The retransmission process for the NAC of the receiving station with a faulty line is all instantaneous.
As a result of this, the riXli line may temporarily become unreliable (7?) due to the frequent retransmission process performed on some receiving stations. The signal is transmitted by Rh (7shi 5/2 (^tsu C2 and Kagono;gu 6, Hne 1 sentence par, Y result at the transmitting station) -Giga L 7'j ACK, /
NA (Send to 2 (from J to each receiving station's Dr. A c K-
The total number of 7 N A CK signals r1 is determined to be 11, and all the broadcast signals are sent in that order in accordance with that order. good party jM
station (against this 2. p4 transmission processing all 1st station (this line 1)
, its '2nd station 1c J Ikero Lki - It is possible to receive all the 1+ broadcast signals in a short time.

(Example) ix fruit 1 @ do l Fig. 1 (zu: -* of the present invention, this is a diagram of the purchase of the present invention which accepts the same hill. It indicates the system satellite, especially the broadcasting capability of satellite communications.
The transmission path for ``I;'' is ``I!''.・Use all f5 fake lines τ,
There are 3, now 5 Headquarters 11 to 3 N2'er12 s
13. When transmitting 141 pieces of paper, it costs money 7') 9 pieces?
-f: 11-1□-Delta gold 7 blocks outside the paper 1] 5
・Rilko partition 1st block [Tsuku. It is transmitted by 21 consecutive satellite broadcasts up to the 7th block in the column. Company 1
2.1311・From the first block of the bag
+ ICijsu A CK / N A (,: K-
(; g q is sent back using the backward terrestrial line 22123+24.The backward terrestrial line has higher quality than the wireless line [22123+24], so it is safe to assume that no transmission errors will occur.

At Head Office 11, please note all the ICs for each branch office regarding the above-mentioned valley block. 0 For example, suppose that the constant signal # transmitted in the memory is shown in Table 1. 0 At the head office 11, from the signal stored in this memo 1, each branch office 12, 13 .1
Count the number of days of the signal in each NA of 4 (,', and
Obtain (l) shown at the bottom of the table.

Table 1 Now, as a retransmission order, the receiving station 1 will retransmit the next block 111th time after the NACK signal is returned in the same order of reception with the least total number of NACK signals. NA
If the branch offices are arranged in 110, which has the least number of CK signals, the branch office 12. Branch 14. There are 13 branch offices. The order of blocks to be retransmitted is first block 4, which has returned a NACK signal to branch office 121, and block 5, which is block 5, to branch office 14.
For f, the order is block 1, block 4, and block 6 which returns NA(,'Ki), but block 4 is not sent because it is immediately retransmitted, and block 6 is sent after block l. The primary ζ that retransmits the %NACK signal is sent to the branch office 13. Block].

Block 2. Block 3. It will be retransmitted in the order of block 4, but block 1. Block 4 has already been retransmitted, so block 2. Block 3 is retransmitted sequentially.

If, as shown in Table 2, all ACK signals are returned as a response from each branch office for the retransmitted blocks, branch office 12 receives eight blocks, and at point nine, branch office 14 Then, when 10 blocks are received, the reception of data of all n 7' blocks is completed.

As a result, the branch offices that receive the documents quickly can start preparing the paper as soon as possible.

Table 2 Second Embodiment Instead of the retransmission procedure shown in the first embodiment, a retransmission method j@ shown below will be applied to explain an example of a mental disaster.

The total number of NACK signals is N (N22) from the branch office.
It returns the K damage signal and gives summer of l/N to each of the t blocks i. This operation is carried out for all branches where 2N≧1 is counted, and the sum of the sums is calculated for each valley block, and the block with the largest sum of sums is retransmitted.

IL In this embodiment, it is assumed that such a richness is used to dynamically determine retransmission blocks. In other words, once the retransmission processing fee has been processed, if the retransmission 'li- request is still made and ACK/NACK signals are not returned from all nine branches, the above weight calculation is performed for the remaining blocks, excluding the relevant block. I will do it. To be more specific, based on the ACK/NACK signals stored in the memory, the sum of the NACK signals for each company and the sum of the weights of each block are calculated as described above, and the block with the largest sum of weights is selected as follows. It will be resent to.

Assume that the ACK/NACK signal and the number of NACK signals for the transmission of the first series of data blocks as shown in FIG. 2 are obtained as in the first practical example.

At this time, the NACKfg number was returned according to the above procedure, and for nine blocks, branch offices 12, 13, and 14 received 1
When weights of /2, 1/4, and 1/3 are given, the sum of the hawks in each block is σ as shown in Table 3. Therefore, block 4 with the largest sum of weights is retransmitted first.

In the next step, A for retransmitted block 4 is
Since the eK/NACK signal has not been returned yet, the remaining blocks excluding this block are shown in Tables 4 and 5, respectively. This results in block 5 for retransmission to the arrow.

Before the next retransmission, the branch office 12 sends a NACK signal as a response to the previously retransmitted next block 4, and the branch office i3. If the AeK signal is returned from t4 and is 9, NAC for each branch office
The sum of the K signals and the sum of the weights of each block are shown in Tables 6 and 7, and block 4 is then retransmitted.

Table 6 Table 7 In this way, by adopting a dynamic retransmission block determination means even for blocks that have been retransmitted once, retransmission requests 1 for blocks o and 7 that are considered to have high retransmission priority It becomes possible to deal with this problem quickly and suddenly.

〔Effect of the invention〕

According to this invention, in broadcast communication, frequent retransmission processing by some receiving stations due to temporary link failures due to rain disturbances in satellite communication, which should normally be transmitted. It is possible to prevent the transmission of a series of signals from being delayed. Even in cases where there is no 4fJ line failure and there is only a momentary line failure, as in the case of Joromi, the receiving station I, which has a good line, can quickly complete the reception of the series of signals that should have been received. It is possible to

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. 11...Head office (Junpo signal transmission station), 12 e 13
t14 --- Branch office ([journal news signal receiving station]), 21 --- Paper data transmission line (satellite line), 22, 23. 24 ---
- ACK/NACK signal return path (terrestrial line). Agent: Nori Chika, @ Right
Kikuo Takehana

Claims (1)

[Claims] (1) Consisting of one transmitting station and multiple receiving stations, when the transmitting station transmits a broadcast signal and each receiving station receives the broadcast signal, the receiving station checks the ACK/ACK of the received signal.
A NACK signal is sent back to the transmitting station, and the ACK/NA
In a broadcast communication system in which the transmitting station retransmits the broadcast signal in accordance with a CK signal, means for continuously transmitting a predetermined number of the broadcast signals to the transmitting station; a storage device that stores the ACK/NACK signals from each of the receiving stations for each of the series of broadcast signals;
The system comprises means for counting the total number of K signals, means for determining the transmission order of the broadcast signals to be retransmitted based on the total number of NACK signals, and means for sequentially retransmitting the broadcast signals in accordance with the transmission order. A broadcast communication system characterized by: