What is Relay? Thank you in a short word.

To put it simply: a relay is a wireless World Wide Network connection.

In more detail: cellular radio systems rely on relays to serve a large number of users in a limited wireless spectrum.

The concept of relay refers to allowing a large number of users to share a relatively small number of channels within a community, i.e., assigning channels to each user on demand from the available channel library.

In a relay wireless system, each user is assigned a channel only when there is a call, and once the call is terminated, the previously occupied channel is immediately returned to the available channel library.

Based on statistics on user behavior, relays enable a fixed number of channels or lines to serve a larger, random group of users. The company uses relay theory to determine the number of lines that need to be allocated for office buildings with hundreds or thousands of units. Relay theory is also used in the design of cellular wireless systems, where there is a trade-off between the number of lines available** and the likelihood that no lines will be available during peak call times.

When there are fewer lines, there is a greater chance that all lines will be busy for a particular user. In a trunked mobile wireless system, when all wireless channels are occupied and the user requests service, a call block or system denies access occurs. In some systems, it may be possible to queue the information of the user who is requesting a call until a channel is available.

The basic principles of relay theory were developed by the Danish mathematician Erlang in the late 19th century, who worked on how to serve a large number of users with limited service capabilities. Now, use his name as a unit of traffic intensity. An erlang represents the traffic strength (i.e., call duration per hour or per minute) of a fully occupied channel.

For example, a channel that has been occupied for 30 minutes in an hour has an erlang.

Definition of the basic terms used in the relay theory:

Blocked calls: Calls that can't be completed at the requested time due to congestion, also known as lost calls.

Traffic Intensity: Characterizes the channel time utilization, which is the average occupancy rate of the channel, measured in erlang. It is a dimensionless value that can be used to characterize the time utilization of a single or multiple channels. It is denoted as a

Load: The traffic intensity of the entire system, measured in erlangs.

Class of Service (GOS): A quantity that characterizes the congestion level, defined as the probability of call blocking (expressed as B in Erlang) or the probability that the delay time is greater than a specific time (expressed in C in Erlang).

Request Rate: The average number of call requests per unit of time. Expressed as l seconds.

Concepts in communication.

Example: Satellite Ground Station - Satellite - Satellite Ground Station, the satellite is the relay, which completes the ** of the signal, and is divided into transparent ** (no substantive processing of the signal) and non-transparent**.

Trunk – The connection between two switching devices.

It's like an amplifier.

A repeater is a connected device on top of the physical layer of a network. It is suitable for the interconnection of two types of networks that are exactly the same, and the main function is to expand the distance of network transmission by resending or retransmitting data signals. A repeater is a physical layer device of the OSI model of a network device that reproduces and restores signals.

Simply and in layman's terms, the repeater is used to amplify the signal in the network cable, and the theoretical stability of the general five types of network cable is 90 meters, while in practice, the general brand is only 70 80 meters, and no matter how big it is, it will lose packets. At this time, if we still have to use ordinary Category 5 twisted pair cable transmission, we need to put a repeater at a position of 80 meters, so that this line can work stably within a length of 160 meters.

The repeater only acts as a packet and does not make any changes to the contents or headers of the packet.

The relay is not to maximize the signal of all nearby wireless networks, but to amplify the signal of the relay, only one signal can be relayed at a time, and the signal can be converted into wired + wireless output to the desktop and the laptop, mobile phone and other Internet access.

The role can be likened to "the boss's female secretary". External information must first pass through the small secretary before it can reach the boss's ears, which will cause some information signals to be amplified or attenuated or filtered out. View the original post

It's comforted.,It's still at this level.,I don't know the relay.,Do you always play network cards? The network card is used for PJ, and the route is used to access the Internet View the original post

Only one signal can be relayed at a time... It can't be automatic, and it can't stack. View the original post

A simple network card CW can only be used by one host, which is like a strong J; Using a route relay (I don't know if WDS and a relay are the same thing, I only use WDS) can be used by multiple hosts at the same time, just like wheel j. View the original post

Not all, but a certain one, to be exact, the relay you choose from a group of signals. View the original post

The network speed of the bridge is relatively good.

Bridging is the bridging of a pair of devices that bridges signals from one point to another. Relay.

It is two points that are too far apart or two points that cannot be bridged directly. Bridging is the mainstream technology, where the WiFi access point is manually specified, while the relay automatically determines the WiFi access point based on the signal strength. Relay adds a verification level for data transmission, and is not as stable as bridging.

Repeater mode.

In repeater mode, the router wirelessly connects with a wireless router that can access the Internet.

Establish a connection to amplify the wireless signal on a wireless router that can access the Internet. The name of the amplified wireless signal is the same as that of the original wireless router.

Applicable places: There is a wireless router that can access the Internet, but the wireless signal of the wireless router is wired, and it is used when you want the wireless signal to cover a wider range.

Wireless Trunk Mode: The relay of the wireless AP in the network connection.

Hello, I'm a master of life without cliffs, and I'm answering for you, please wait! 1. What does the function of wireless relay mean: Wireless relay mode, as the name suggests, means that the wireless AP plays the role of relay in the network connection, which can realize the relay and amplification of signals, so as to extend the coverage of the wireless network.

The relay is generally called repeater, which generally only needs to be set on the second router, that is, the secondary router, and the main router only needs to be configured to access the Internet.

Wireless relay mode, as the name suggests, means that the wireless AP plays the role of relay in the network connection, which can realize the relay and amplification of signals, so as to extend the coverage of the wireless network.

The wireless relay mode networking method is extremely widely used, in the wireless network has begun to be widely used today, many places will be because the site is relatively large or there are obstacles, and the coverage of wireless equipment can not reach the distance we need or be hindered in the middle, at this time we use the wireless relay mode to connect the wireless network, can meet the requirements of networking. In the past, many wireless AP products only achieved wireless connection through wireless bridges, but the previous wireless bridges only had the bridging function, and could not achieve the effect of unlimited coverage.

Working principle of relay room: an underground pipeline construction method developed after shield construction, which does not need to excavate the surface layer, and can cross roads, railways, rivers, surface buildings, underground structures and various underground pipelines.

After the first section of the pipe is finished jacking into the soil layer, the second section of the pipe is continued to be jacked. The principle is to use the thrust of the main top cylinder, the pipeline room, the relay room, etc., to advance the tool pipe or the plum branch roadheader from the working pit through the soil layer to the receiving pit and lift it. The pipe is buried between two pits immediately after the tool pipe or TBM.

Relay room: In the process of long-distance jacking, when the jacking resistance exceeds the allowable total jacking force, and the jacking distance cannot be reached at one time, the relay segmented relay jacking must be set. When the jacking length of this pipe jacking project exceeds 100 meters, a relay room is considered to be set up behind the machine head, and the thixotropic mud grouting process is adopted.

The relay room consists of a front shell, a jack and a rear shell. The front shell is connected with the front pipe, the rear shell is connected with the rear pipe, and the front and rear shells are plug-in connections, and the two are sealed by rubber waterstops to prevent the water, soil and slurry outside the pipeline from flowing into the pipeline.

Each relay is equipped with 10 jacks with a jacking force of 30 tons each, and the jacks are evenly arranged along the circumference. The jack had a stroke of 28 cm, which was fastened to the front housing with fasteners made of flat iron. The steel shell structure is finished to ensure that it does not deform during use.

The outer diameter of the shell of the rock pat relay is the same as the outer diameter of the pipe section, which can reduce soil disturbance, ground settlement and jacking resistance.

In long-distance pipe jacking, it is used for segmented jacking and then is located in the middle of the pipe section. It is generally made of steel, and jacks are set along the pipe ring.

Merit. The biggest advantage of this method is that it can shorten the length of the joint, thereby reducing the number of jacks and backs. When the culvert is too long, it is difficult to jack once, and it can be divided into two sections and the relay method is adopted.

In the jacking process, because the trajectory of the center of gravity of the two sections is not easy to coincide, there will be relative dislocation and rotation between the nodes, in order to ensure the continuity of the adjacent two sections during jacking, the shear wedge or steel tower wedge that resists internode shear must be set between the relays, or the shear wedge and the steel tower wedge are used simultaneously; The required quantity: the type of I-beam, the number and diameter of U-bolts, etc., are determined by the size of the shear force.

Precautions. 1. The top stroke of the relay room should not exceed 20 cm each time, and the top stroke is too large to lead to the increase of shear force, and the shear wedge and other facilities bring difficulties. 2, the steel sheath is designed to prevent the soil from invading the box, so the width of the plate is determined by the jack elongation plus 15 cm of lap amount, so that the soil can not invade as appropriate, the thickness of the plate can generally be used 8 10 mm, and the bolt with a pitch of 20 35 cm is fixed on the box of the advance section.

3. The number of jacks is determined by the required jacking force. 4. There are two ways to place the jack: (1) at the end of the bottom plate of the advance joint box between the relay between the reinforcing bars, the state fingers of the reinforcing bar are truncated and the pickaxe nest is left, and then the jack is placed in the pickaxe nest for jacking, and the truncated steel bar is welded after the top book is matched, and the original appearance of the box is restored by pouring concrete.

2) the jack is placed on the box culvert bottom plate, and the top wall is built at the end of the bottom plate, and the cross-sectional size of the top wall and how many shear steel bars are placed are determined according to the calculation of the jacking force, and the top wall is chiseled off after the jacking. 5. At the indirect seam of the relay, the connection of the waterstop is very important, such as according to the general seam treatment, when there is no waterstop, often due to the uneven settlement of the structure, resulting in the failure of the seam waterstop. Therefore, it is best to use the method of reserving a gap and then trapping a rubber waterstop, so that the waterstop can not only stop the water but also adapt to the settlement requirements of the structure.

6. When the main structure is prefabricated, bolts should be embedded at the same time, holes and grooves should be reserved, steel sheath bottom plate and top wall should be poured or pickaxe nests should be reserved.

The word interpretation of relay is: 中行 zhōngjì. (1) It is between two lines and connects the two lines.

The word interpretation of relay is: 中行 zhōngjì. (1) It is between two lines and connects the two lines.

Pinyin is: zhōngjì. The structure is:

Medium (monomeric structure) followed (left and right structure). The phonetic pronunciation is: 一 .

What is the specific explanation of trunk, we will introduce it to you through the following aspects:

1. Online explanation [click here to view the details of the plan].

A relay is a transmission path between two switching centers. A trunk is a physical connection that carries multiple logical links. With the development of science and technology, the concept of trunk is not only applied to wireless communication, but also the trunk of network communication switch can also be called a kind of trunk.

In daily life, we often need to chat with friends at home, or contact customers outside the company through the office. Trunks are indispensable for these calls. One cannot mention the relay without mentioning the Danish mathematician Irish (Erlang) at the end of the 19th century.

He was the first to put forward the theory of trunking, and the relay traffic unit was also named after him. The traffic unit erlang indicates the traffic intensity of a trunk that is fully occupied (i.e., the call duration per hour or per minute). For example, if a trunk is occupied for 30 minutes within 1 hour, the traffic volume of the trunk is the following.

Synonyms about relays.

Transit. Antonyms about relays.

Interrupt. Verses about relays.

The mahogany furniture continued in the hesitation of the brocade, and they returned to the relay after the eternal conversation, leaving no longer but the deepening darkness, which continued to deepen in the darkness.

Words about relays.

relay idioms.

There are successors, there are no successors, there are no broken successors, and the long branches are short.

Words about relays.

Going forward and succeeding, some people rise and fall, then the earthquake and then the departure, and no one rises and falls, and no one rises and falls, and Ji Qiu searches one after another, and then dies, and the long and short, and the night follows the dynasty.

Sentence formation about relay.

1. The coil drive circuit is designed by using Darlington push-pull technology, which realizes the automatic measurement of the power supply, pick-up voltage and release voltage of the relay coil power supply in the reliability life test.

2. Multi-hop connection wireless communication system and origin station, relay station, destination station and control signal.

3. The influence of Doppler frequency shift caused by the mutual motion of UAVs on the performance of ultra-wideband communication links in the UAV relay model is emphatically analyzed.

4. In this paper, the research on cooperative communication within the homogeneous network mainly focuses on repeaters.

5. Carry on the past and forge ahead in the review, and create brilliance in the outlook!