China Telecom should discard the CDMA network in a short time

China Telecom should discard the CDMA network in a short time

4G era has arrived, because the current 4G FDD-LTE photo has not yet been issued, basically mobile drama, mobile is testing VoLTE, it is strange that China Telecom claims to test the VolTE technology some time ago, but it has not put forward such a test demand in its current mobile phone demand. Theoretically, mobile has the best GSM network in the world. In the 4G era, the voice bearer network is sufficient, and the mainstream 4G mobile phones in the market will give priority to CSFB of GSM. Because China Telecom's 2G/3G adopts the CDMA/EVDO technology, It is very embarrassing in the 4G era. On the one hand, the CDMA technology will no longer develop. On the other hand, the coexistence of CDMA and LTE technologies. The solution adopted by China Telecom's 4G mobile phones is SVLTE or SRLTE. The former is a single-card, three-to-two-pass mobile phone, and the latter is a single-card, three-to-one mobile phone, CSFB's single standby mode and call decline cannot be achieved. The limitations of CDMA technology have become the biggest obstacle to the development of China Telecom. In this case, it seems that China Telecom is at the most unfavorable position in the 4G competition, but from another perspective, if China Telecom uses a radical approach to deploy a network of VoLTE technology in a short time, abandoning the CDMA/EVDO network will be the most favorable development trend.

Due to Qualcomm's monopoly on CDMA technology, the supply of CDMA chips on the market is basically the exclusive monopoly of Qualcomm. To produce CDMA mobile phones, only Qualcomm's chips are available. Qualcomm's Chip Platform is difficult to develop because of its high-tech and low-product maturity. Moreover, CDMA is not a mainstream technology in the world, leading to a small number of CDMA mobile phones, the development of China Telecom has been greatly restricted. In order to develop users' needs over the years, China Telecom's mobile phone has many dual-standby systems and needs to support both CDMA and GSM dual-standby systems, in this case, coupled with the CDMA itself license fee and chip prices higher, leading to the same grade of CDMA mobile phone than GSM/WCDMA, TD-SCDMA mobile phone prices to be higher. This leads to a loop. Although CDMA is a symbol of China Telecom, it is neither the result of China Telecom's active selection nor the result of economic optimization.

4G has two major advances. One is the adoption of OFDM technology, which greatly improves the spectrum utilization efficiency. The other is that 4G networks are pure data networks, unlike 2G and 3G networks, it is a hybrid network of speech and data. 2G networks are used to replace analog communication technology. The basic design is used for voice calls. Later, data communication technology was developed as needed, and many technologies are based on voice channels. The 3G network is a hybrid network of speech and data, and most of the protocols take into account data channels and voice channels. 4G networks are a revolutionary change in data-only networks and are expected to achieve the same success as 2G networks. Of course, voice calls can also be performed in 4G protocols. This technology is called VoLTE. VoLTE is an IP phone, that is, the data network used for voice calls, unlike the previous dedicated voice channels. The current voice call capacity can be roughly calculated. CDMA calls use the 8 k evrc format and the data rate is 8 Kbps, generally, the communication rate is up to 50 Mbps and down to 150 Mbps when LTE Cat4 does not support CA. Based on the uplink rate, it can accommodate 6000 simultaneous calls. One month is calculated based on 30 days, 30*24*3600 = 2592000 seconds, 8 Kbps = 1 KBps. After calculation, only GB of data traffic is required each month to maintain uninterrupted calls, although the volume of VoLTE data is definitely greater than this calculation, it can also indicate that the carrier costs will be very low, and the user's unit call fees can also be reduced to a very low level. After the VoLTE network is deployed, voice calls are free of charge. You only need to have a certain amount of data traffic each month.

If China Telecom fully deploys the VoLTE network, the biggest benefit is not that it can reduce the call cost, but that it can no longer limit the number and type of mobile phones. Now the mobile phone solution provider provides 4G mobile phone chips generally support 5 models, namely: GSM/WCDMA/TD-SCDMA/FDD-LTE/TD-LTE, telecommunications only need to support FDD-LTE/TD-LTE two models of the phone can be, in China Unicom and mobile multi-mode mobile phone on the way to support the Telecommunications of the 4G network will be very simple, mobile phone manufacturers will also be very happy to support this. By the way, this is a huge change for China Telecom. It is also a huge advantage, and there is no need to worry about the number and category of mobile phones. At this time, all mid-and high-end multi-mode mobile phones can easily support telecom networks, while low-end mobile phones purchased by Telecom can greatly reduce the cost because they only need to support LTE. The previous saying "When Telecom is deeply connected to the sea, the arcade is a passer-by" will become history.

Is it a radical approach to fully deploy VoLTE and discard CDMA networks? Not under careful consideration. With the arrival of the 4G era, the full deployment of 4G networks by operators is an unchangeable trend. Taking advantage of this trend is an inevitable choice. What China Telecom needs to do is to speed up deployment and deploy VoLTE at the same time, so as to finish the work to be done in advance. Mobile has an obvious first-mover advantage in 4G, and its 4g construction speed is no small hit. If we want to compete with mobile and at least remain undefeated, first of all, telecom at least to achieve the same construction speed to maintain a certain level of competitiveness, telecommunications do not tangle in TD-LTE or FDD-LTE, FDD-LTE and TD-LTE are actually different expressions of the same technology, the difference is not WCDMA and TD-SCDMA, the two LTE technology maturity is the same. Second, China Telecom should give up its investment in CDMA networks like China Mobile, and focus on 4G networks. Multi-Party bets will eventually lead to failure of multiple parties. Once again, after the Fast deployment of VoLTE, China Telecom no longer requires CDMA as a required mode on the terminal. VoLTE is cheaper than CDMA in terms of call charges, and VoLTE can be supported without changing the uimcard, in this way, CDMA users will quickly migrate to the LTE network, and the CDMA network will naturally die out in a short time.

It is a pseudo-proposition for China Telecom to give up CDMA networks in a short period of time, but it is inevitable to establish a 4G network, the existence of the CDMA network does not increase the capacity of the entire mobile network of China Telecom. It also occupies valuable low-frequency resources and has an advantage in wide-area coverage of 4G. On the mobile phone end, if CDMA is not supported, 4G mobile phones are even cheaper than 3G mobile phones, and there are more options for quantity and types. Therefore, the sooner China Telecom gives up its CDMA network, the better.