Channel utilization rate, back off n frames, acknowledgement piggybacking
Channel utilization refers to the ratio of the time needed by the sender to send valid data in the entire transmission cycle. In the Go-Back- N ARQ protocol, there were many factors to consider when calculating the channel utilization. The ARQ protocol with N frames back was a continuous automatic repeat request protocol. Under this protocol, the sender could send multiple data frames in a row, and the receiver would acknowledge each received frame. if that receive party detected an error in a certain frame, the receive party would discard the frame and all the subsequent frames, and notify the sender party to re-transmit the error frame and the subsequent frames. When calculating the channel utilization, factors such as the size of the transmission window, frame length, transmission rate, and transmission delay should be considered. Suppose the transmission window size is N, the frame length is L, the transmission rate is R, and the transmission delay is t (the two-way transmission delay is 2t). In an ideal situation, if there were no frame errors and the channel was always available for transmission, the channel utilization rate could be close to 100%. However, in reality, due to factors such as transmission delay and frame error retransmissions, the utilization rate would be reduced. The "confirmation piggybacking" meant that during the data transmission process, the receiver could piggyback the confirmation information of the forward data frame in the data frame transmitted in the reverse direction. This can reduce the overhead of sending a confirmation frame alone, thereby improving the channel utilization to a certain extent. For example, when the receiver has data to send back to the sender, the data frame can contain the confirmation information of the previously received frame. In this way, there is no need to specifically send a confirmation frame, which saves channel resources and improves channel utilization. "Choose" was equally exciting. Everyone was welcome to read it!
How to calculate the channel utilization rate of the selected replay protocol?
Let the transmission delay + the round-trip delay + the reception delay be the transmission period of one frame, and the continuous period is the ARQ. The channel utilization rate of (including the selection of the re-transmission protocol) is more than that of the stop-and-wait protocol by (n)(window size). The channel utilization rate of the stop-and-wait protocol is (<<<frac><br>><<br>></>>)(where <<br> is the transmission delay,<<<Ta>> is the reception delay, and <<<br> is the round-trip delay). Therefore, the calculation formula for the channel utilization rate of the chosen replay protocol <<br> is <<frac>{n <times><>></>><). At the same time, the number of bits in the frame sequence number is set to <<k>>, and the transmission window of the <<PR>> protocol is usually <<<leq2 ^{k}-1>>. In the case where both <<T>> and <<T>> are determined, the larger the <<N>>, the greater the channel utilization. "Choose" was equally exciting. Everyone was welcome to read it!
Channel utilization of backward n-frame protocol
The N-frame Backoff (GGN) protocol allows the sender to send multiple data frames in succession to improve channel utilization. In the stop-and-wait protocol, the sender could only send one frame at a time, and the channel utilization rate was low. However, GGN adopted the sliding window method, and the sender maintained a set of sending windows, which could send multiple data frames at a time. The calculation of channel utilization is related to many factors, such as data transmission rate, one-way transmission delay, data frame length, etc. Suppose the data transmission rate is R (bit per second), the one-way transmission delay is T (s), and the data frame length is L (bit). In an ideal situation, the sender can continue to send data frames without considering errors and retransmissions during transmission. At this time, the channel utilization can be approximately expressed as: <U>=<frac{L}>{(2T +<frac{L}{R})R}>. In the GGN protocol, the larger the transmission window, the more data frames allowed to be transmitted, and the higher the channel utilization rate. However, the transmission window could not be infinitely large. When using n bits to code, the maximum transmission window is <<2> n>-<1>. However, if there was an error and the transmission needed to be repeated, the GGN protocol's transmission mechanism would affect the channel utilization. Since GGN uses a cumulative acknowledgment method, the sender will move the sending window forward after receiving the acknowledgment. If the sender does not receive the acknowledgment or receives a negative acknowledgment (NAC), it needs to retreat N frames and resend all the sent frames after the acknowledgment frame. When an error occurs, the frame that has been transmitted correctly will also be retransmitted, thus reducing the channel utilization to a certain extent. "Choose" was equally exciting. Everyone was welcome to read it!
Number of frames higher than refresh rate
When the frame count was higher than the refresh rate, since the monitor could not be updated at a speed higher than the refresh rate, the frame count that exceeded the refresh rate would be wasted. For example, if the refresh rate of the monitor was 60 Hertz (60 times per second), and the number of frames in the game reached 100 frames per second, then the extra 40 frames could not be fully displayed by the monitor. This part of the graphics processing power could not be effectively used in the display effect. However, in some cases, even if the frame count was higher than the refresh rate, it could still bring some benefits. For example, when the frame count output of the graphics card was uneven, a higher average frame count would help provide a more stable image performance within the refresh rate range. In addition, during the dynamic image switching process, even if some of the frames could not be displayed in time, it could still improve the lower limit of the image's smoothness to a certain extent. "Choose" was equally exciting. Everyone was welcome to read it!
Channel utilization calculation of backward n frame protocol
1. ** sender's angle ** - Let the time to send a frame be <T_f>, the transmission delay be <T_p>, and the size of the sending window be <W>. - In the stop-and-wait protocol (transmit window <<W = 1>>), the channel utilization rate <U>=<frac>{T_f}{T_f +2T_p}>. - For the backward frame protocol (GGN), the sender can send a continuous number of frames. The total time it takes for the sender to send the W frames is W, and the total time from the start of the transmission to the time it receives the first acknowledgment frame (assuming it is received correctly) is W. - Therefore, the channel utilization rate is <U>=<frac>{WTf>}{WTf +2Tp>}. 2. ** Receiving angle ** - The receiver used the cumulative confirmation method. - Assuming that the sender sent a number of frames, the receiver will discard all the frames after the number of frames. - The sender needs to re-transmit all the frames starting from the <k> th frame, which will affect the channel utilization. In the ideal case (error-free transmission), the channel utilization rate is calculated as before. In the case of errors, the channel utilization rate will be reduced due to retransmissions. The specific degree of reduction depends on the frequency and location of errors. 3. ** Overall consideration ** - The channel utilization is also related to the number of digits in the frame number, because the transmit window size, W, has a maximum limit, W'leqslant2 ^n- 1. When W is close to this maximum value, the channel utilization rate can be improved without error, but it also increases the risk of frame number confusion (like the example of the 2-bit number mentioned earlier). Once the error is retransmitted, the channel utilization rate will be greatly affected. "Choose" was equally exciting. Everyone was welcome to read it!
The Significance of Acknowledgement in Novel
Acknowledgement in a novel can be very important. It might be used to show respect for sources of inspiration. For example, if an author bases a character on a real - life person, an acknowledgement is a way to give credit. It also adds a sense of authenticity to the work.
Food scraps utilization
The following are some ways to use food scraps: - ** Fruits ** - ** Banana peel **: It can be chopped and cooked first, then packaged in a frozen package. When you want to eat it, you can directly take it out and heat it up to fry it. However, banana peels contained more impurities, so the flavor would be slightly astringent. - ** Orange peel **: It is rich in oil and has a strong fragrance after being heated. It can be made into snacks or drinks. For example, the dry orange peel was cut open, the flesh was scraped out, and then processed according to the method of apple preserved fruit processing. The dry orange peel could also be heated with tea to extract the fragrance and drink it. - ** Orange peel **: Also known as orange peel, it can be soaked in water to drink. People who have motion sickness can smell fresh orange peel to relieve motion sickness. It can also be used to make orange peel sauce, shredded orange peel, orange peel soup, and other delicacies. - ** Meat and internal organs ** - ** Beef jerky scraps (beef jerky feathers)**: Beef jerky scraps that are more expensive in supermarkets. After heating them in an air frying pan, they are very fragrant. Some of them have tendons and can be added to noodles. - ** Tripe shreds **: 30 yuan can buy 5 catties. It has already been cleaned. A simple rinse can make an entire pot. - ** Vegetables ** - Celery leaf: It has a special fragrance and is rich in calcium, iron, potassium, and vitamins A and C. It can be used to make celery leaf mixed with fungus, celery leaf dumplings, celery leaf bread, etc. - ** Radish Tassels **: The nutritional value is higher than the radish root in many aspects. Eating it often is good for the eyes. It has a high level of diet fiber and can be used to make dishes. - Watermelon rind: Also known as Watermelon Cuiyi. It can be used to make watermelon rind salad, watermelon rind egg soup, watermelon rind fried meat, etc. It can also be used to make soup, such as watermelon rind, poria cocos and licorice soup. - ** Grains ** - ** Remaining Dough **: Can be used to make simple pastries such as dough pieces and dough lumps. Roll the dough into thin slices, cut it into small pieces, and cook it. - [The remaining rice grains can be used to make porridge or ground into vermicelli.] After washing the rice grains, he added an appropriate amount of water and boiled them into porridge or ground them into powder to make rice noodles. - ** Others ** - [Fish Scale: Rich in nutrients. Can be used to make fried fish scales, fish scale jelly, and other delicacies.] When using kitchen scraps, pay attention to hygiene and wash them to ensure the safety of the ingredients. For perishable ingredients, such as vegetables and meat, they should be properly preserved to prevent deterioration. They can be placed in sealed bags and stored in the refrigerator. At the same time, they should give full play to creativity to turn scraps into treasures. The novel "Ledge" is equally exciting. Everyone is welcome to click and read it!
Which channel was the ninth-rate overlord broadcasting on?
Hegemon of the Nine Paths was a novel, so it wasn't broadcast on a specific television station. However, if you are referring to the adaptation of the novel into a TV series or movie, you can check the relevant media information to obtain detailed information about the broadcast.
How is Acknowledgement Represented in Novel
Acknowledgement in a novel can be represented through dedications. For example, an author may dedicate the book to someone who inspired them, which is a form of acknowledgement.
Supernatural Writers' Acknowledgement in Fanfiction
Well, in fanfiction related to 'Supernatural', some writers might show their acknowledgement in various ways. For example, they could reference the original show's plotlines and characters in a respectful manner. This can be as simple as using the correct character traits and backstories. It shows that they are aware of the source material and are building on it in their own creative way.
Waste utilization of cloth scraps
There were many ways to make use of cloth scraps. It could be recycled and made into cotton, which could increase the profits of the company and conform to the concept of circular economy. The waste cloth could also be made into pellet fuel, which had a high heat value and cost about 300 - 400 yuan. It could be used in cement plants, biological power plants, and large enterprises. In daily life, cloth scraps were also widely used. It could be used to make all kinds of household items, such as pillows, all kinds of cushions, quilts, storage baskets, storage bags, key bags, storage baskets, cloth dolls, etc. He could also make decorations, such as making YOYO flowers to sew table mats, embellishing bags, or combining them with old cardboard to make photo frames. It could also be used to make handmade cloth baskets or baby undergarments. In addition, he could also combine the pieces of cloth to make some creative items, such as using pieces of cloth, single tape lining, cotton, base cloth, lining cloth, sewing thread, zipper and other materials to make unique items. The novel "Ledge" is equally exciting. Everyone is welcome to click and read it!