Network has been the mainstream in the development of mobile communication. But the current LTE is pure data network, make or receive voice must back to 3 g or 2 g, so that users call delay lengthened, perception even fell. To solve this problem, recently, chongqing unicom according to the requirements of group company, under the technical support of zte, carried out on 4 g upgrade zte BSC network work comprehensively.

Net running now zte GSM network equipment construction in operation since 2008, eight years time, the equipment aging, high failure rate, such as the limited hardware platform function problem, also lead to greater risks for the upgrading of the network. To protect the network upgrade work, chongqing unicom maintenance personnel carries forward the spirit, group discussion meeting for many times, modify the upgrade scheme for many times, in the end, planning out each upgrade cut over time and business of CQT testing plan, plan aiming at all kinds of conditions in the upgrade process, one by one, to confirm evaluation, developed a series of security measures, to ensure that after the upgrade for voice, data services, SMS business running.

Network upgrades, chongqing unicom launched a 4 g LTE dropped to GSM voice function, to solve the problem of no 3 g coverage 4 g voice has a vital significance. According to statistics, model.flood-control of taibai village, village girls, TongLiang, metro spiral lions bay and so on more than 800 2 g site benefit; At the same time after the new voice GSM to LTE fast return FR function, improve the user experience.

It is reported, this upgrade lasts for 3 months, involving chongqing urban, suburban, fuling area a total of more than 7500 sets of wireless devices, such as organized major cut over 26 times, network upgrade has reached the expected goals, improve the network quality and customer perception.