When discusses the VoIP deployment, usually concentrates the question in the latency, the quality and the cost. Obviously, the latency question is important, if because the pronunciation data packet cannot arrive on time, their completely stall. Latency question directly grade of service (QoS) influence. We should guarantee that the pronunciation package of grade of service, causes the pronunciation package and the other time sensitive data transmits quickly as far as possible in the network. The consumer receives PC frequently to the PC VoIP grade of service not good puzzle, they hoped that can obtain high grade and the simple Yi Yong VoIP product and the service as soon as possible, causes between people’s telephone conversation to resemble the mouse to click on the website link to be equally simple.
However, present network branch construction more and more has placed the quality question the first place. Optics router already widely applied in WAN, realizes the essence wide channel transmission. The available many kinds of different methods carry on the data grouping technologies and so on MPLS to be able to realize the network core current capacity QoS trimming. In addition, we may also carry on the initialization to the latency sensitive current capacity main way, with the aim of optimizing on WAN the route, and provides the spare way through the redundant way, has when the problem for the main way uses. In many situations, the connection was away from and the skipping quantity no longer was already important.
Serves the supplier while to solve the latency and quality question unceasingly, many people also start to transfer pay attention to the cost reduction question. In the final analysis, impels the user to give up the stable reliable TDM network transferring uses the IP network the primary cause is cost reduction. Although speaking of serves the supplier, they promote the IP network the primary cause are want through to provide the value-added service to attract the customer, avoids the customer outflow. Therefore, serves the supplier while provides the IP service for the customer, the key emphasis in work will shift gradually to reduces client side product (CPE) or the VoIP edge equipment’s cost comes up. However, the CPE cost is only an end-to-end VoIP deployment cost part, we must consider many other cost elements.
Fully using IP network highly effective
Uses one of IP network superiority is serves the supplier to be possible to carry on the VoIP deployment in each kind of place. If serves the supplier to hope that reduces the network core cost, then they expand the functionality to the VoIP edge equipment on then. Otherwise, if hoped that reduces the net boundary facility cost, then must expand the functionality to the network hard core.
We might as well conceive the such as calling subscriber ID material demonstration, the call repeater as well as the call forwarding and so on auxiliary service location state. The above service may in VoIP grasps the terminal, the local gateway directly or gets together the soft switchboard (aggregator softswitch) to realize. Said from some kind of degree, after deployment auxiliary service, pronunciation quality basic not any change. The present IP network, specially these use MPLS and the GMPLS technology network, may provide the high accuracy control to guarantee each pronunciation package, or each time concrete telephone conversation grade of service and quality.
However, from the cost angle, we must consider many kinds of factors the overall balances. Must realize the low cost, the equipment manufacturer and serves the supplier to understand that the functionality and carries on the choices to it.
We might as well conceive this kind of kind of situation, we processing resource cost multipurposer on server, but is not on the terminal device. Usually thought that must be much higher in the network core position deployment service cost. However, in the network core position deployed that VoIP functionalities and so on auxiliary the service are helpful serve the supplier displays the excess load model fully (oversubscription model) the superiority. Because is not all calling subscribers needs to assist serves, is also not all latent calling subscriber can simultaneously use the network to telephone, therefore serves the supplier only to deploy that the core service supports the minority user then. On the contrary, if deploys the above auxiliary service on the edge equipment, then needs to provide the corresponding service for each user.
Which method cost is lower, is mainly decided by the excess load rate, the actual deployment cost and the network operation cost. For example, if the core support enough auxiliary service station needs the available processing resource occupies the total resources 15%, this part of resource costs not necessarily also correspondingly account for 15%. If in the network resources are at the idle condition, we can catch these not full use resources. On the contrary, if in the network resources load is overweight, will then increase the processing load not only possibly to affect to the network provides the unfailing service the ability, moreover needs to carry on the large-scale investment, will introduce the new processing resource and the foundation bureau end, like this can increase satisfiedly demand. Speaking of the developing country market development especially so.
Increases the recessive cost
Through full use network’s highly effective, VoIP grasps the terminal to be possible Jian Huadao only to have the most basic function. However, reduced cost in fact quite Yu Zhi by this method to solve the question tip of the iceberg. Reduces grasps the terminal cost is the identical, but grasps the terminal and the network connection coordination is the different matter. How in addition also involves to the supervisory service quality, how to serve the cost accurately and so on other questions.
So-called “low cost” equipment, has many recessive cost problems actually. We face still after the challenge will lie will possess the recessive cost will include, could guarantee that this cost will be low which will be worthy of the reputation. These recessive cost including the bill of materials (BOM) cost, the customer hoped the equipment has the function and the characteristic bring the cost which the cost, is the low cost initializes and manages the deployment equipment to need the embedded installment which involves, as well as supports the actual cost which in the actual network the equipment needs.
The IP network’s function and the characteristic are playing the vital role in the attraction customer to the VoIP technology reforming aspect. Not only consumer the numerous functions which and the characteristic already obtained through the PSTN network limit to the splendid pronunciation quality, therefore VoIP serves the supplier not only to need to provide with the existing PSTN quality quite and even the better service, but must provide the position or the time directory services and so on unprecedented service. Thus, the customer only need press several grasps the terminal the button, not can only gain the local pizza to go the service, moreover can obtain the peripheral position information.
The consumer hoped that VoIP grasps the terminal OEM manufacturer to be able to provide the LCD colored monitor, this aspect’s request will possibly bring certain technical challenge. The ordinary consumer thought that the colored LCD display monitor cost should be low, because it is very common in the handset. However, the handset manufacture often obtains the subsidy, therefore the people have the misunderstanding to its low cost. In any event, the user hoped obtains the enough big screen, can obtain the widespread directory services (for example telephone directory, speech recognition and so on), these were they used when handset had already been used to it the function and the characteristic. The question lies, they are familiar with the function, speaking of colored or wide screen LCD, has only met the part application need, does not have the use to other applications. User this kind of intense demand will increase the cost largely, actually cannot obviously improve the service level.
We also propagandize VoIP another kind of superiority to the consumer, is can further improve the pronunciation quality. Therefore, although the low cost is promotes this technological development the primary factor, not only but serves the supplier to consider the processor, the embedded memory and the software permit imputed cost. They must self-examine, in the people are willing to pay in the price, provides the high grade pronunciation to serve whether to be worth.
Forward-looking avoids the operation cost
If our excessively many consideration minimum facility cost, then possibly does not need the important place to increase the operation cost. We may suppose, so long as the customer needs the important passenger clothing support, will affect the profit, although this view will be somewhat biased. If equipment’s function too limits, then possibly with difficulty solves to retards the sensitive high current capacity request. In addition, above equipment possible robustness to be not very high, supports the long-distance network management with difficulty, creates the service monitoring the complication, even affects the basic QoS function. We might as well conceive, if the equipment cannot satisfy service rank agreement (SLA) the request, serves the supplier not to be able to support different SLA, will therefore strangle in the new generation network to be advantageous to the new opportunity which will additionally receive.
Reduces one which of ways the guest clothing supports is which situations before the question does have the estimate to be able to have, and gives to avoid ahead of time. For example, if the connection quality starts to weaken, then serves the supplier to be possible before the telephone conversation interrupt carries on again the route to it. This point when promotes the new technology to the customer especially is important. The network quality meaning is very broad, is not only restricted in user’s under typical condition use experience. If customer before being familiar with and likes on the new technology frequently meets each kind of question, then they as far as possible will avoid using this technology, and will inform this kind of negative experience the friend, will thus affect new technical the promotion.
However, must foresee the question the occurrence, needs us to examine the network performance accurately. For example, the collection real-time net boundary plant parameter may help us to grasp the network performance situation highly accurately, and monitors the telephone conversation situation by this, the foresight question occurrence. Collects above statistical information itself from the edge equipment to be possible to provide the most accurate record, i.e., the core exchange function understood the data packet grasps the terminal transmission to VoIP the situation, but cannot understand whether the data packet does arrive punctually, to be whether useful. In order to understand that the further information, the VoIP hand-hold equipment not only should have the preserved related information function, but should also to serve the supplier feedback information regularly through certain mechanism.
And takes the measure through the estimate breakdown’s occurrence to avoid, serving the supplier to be able to satisfy the customer anticipated, guaranteed that the customer is willing to continue to pay expenses the use service. Therefore, not only the quality of certified level on involves to terminal device’s work question, but also involves to the network end-to-end performance. In order to satisfy the above goal, we need CPE and the network core application software understanding network situation and the pronunciation data packet content. The above software is called the movement, the management, to monitor and to initialize the (OAM&P) software, can serve the supplier to feed back the related situation, helps their detailed record service situation, and comes the effective recognition by this to have the breakdown current capacity situation, thus reduces its hazardous nature. In fact, OAM&P is realizes the low cost to deploy that the initialization and the management function have provided the essential key technologies, thus may found the end-to-end value-added service through the network.
For example, the telephone network current capacity achieves high in the Mother’s Day and the lunar New Year’s Eve (treats confirmation). Understood after this kind of situation, serves the supplier to be possible forward-looking to strengthen the network, meets the anticipated need. In the full understanding situation’s foundation, serves the supplier to be possible to use the same technology through the network standard to solve other peak value time interval problem, even may also solve the peak current capacity which the disastrous accident causes and so on to be unable to foresee the situation the demand. For example, we may formulate the standard to monitor pass the pronunciation router the current capacity. Along with demand increase, we may use the short-term recovery plan according to the standard, lets the router from assign borrows certain band width for the video frequency or in the data band width. If this situation continues to exist, then the router may enhance the lowest band width to guarantee, increases the peak value capacity; Also or may reduce the router the excess load rate to solve the long-term problem.
The related standard may adopt many kinds of forms, including loss data packet quantity, typical latency or peak value vibration and so on. For example, when dials telephones, if suggested uses the router latency is higher than the usual situation, then we may act according to the preliminary design to talk over the telephone carry on again the route. In other words, we may before the telephone connection solves the latent question.
Low cost definition
When discusses the low cost, we should understand that the whole application environment, and actual is clear about anything is the low cost, this is important. In fact, “low cost” not explicit definition. The low cost DVD movie’s price is lower than 10 US dollars, but in the community the low cost MP3 broadcast’s machine price is 50 US dollars.
The IP network causes many possibilities to become the reality, we may use these characteristics through the network core technologies. However, even if we remove the VoIP handset’s all intelligent characteristic, also cannot eliminate the VoIP implementation the cost; On the contrary, will only pass the burden the cost to the infrastructure, enhanced the core equipment’s cost and the service expense cost, but served the supplier to pass the burden the expense has given the user.
The key lay in finds a balance point, both could provide makes the user satisfied, the stable reliable VoIP use experience, and could reduce total cost expenditures and so on deployment, operation and management. Even if is not having the rural area which PSTN competes, the VoIP technology right and wrong intelligence terminal, similarly could not be alone PBX. These systems must support many kinds of functions, so that in can reduce the expense which the CPE cost and will save down to use in providing serves high grade and carries on between the maintenance of equipment to realize balanced, and can support the entire network QoS and OAM&P.
