Failure points of wireless internet services

Wireless or mobile broadband internet service such as CDMA1x, GPRS, 3G or EVDO will have unstable connection. More subscribers they have, more often they will experience an unstable connection. The root cause of this problem could be anywhere depends on the capacity and occupancy of the network infrastructures. Generally, the point where wireless or mobile broadband internet service gets unstable connection could be;

  1. Base Transceiver Station (BTS) capacity
  2. Link utilization
  3. International bandwidth capacity

While subscriber makes a data service on mobile broadband internet service session by dialing to the particular short code (for example #456) from their mobile phone or modem, BTS will allocate some resources for this session. Number of resources needed by data service session is bigger than voice or messaging (SMS) service. It needs around four times of voice resource. It means that if voice needs 64 kbps to make sure the calling session running well, data service (wireless or mobile broadband internet services) need 4×64 kbps. Meanwhile each BTS has limited capacity. Therefore, Telecommunication Company which has limited carrier frequency will assign first priority to voice and messaging (SMS) services rather than data service (wireless or mobile broadband internet services). There are many ways to resolve the capacity issue on the BTS side;

  1. Assigning dedicated RF channel frequency for data service (wireless or mobile broadband internet services)
  2. Different frequency between voice and data services (wireless or mobile broadband internet services)
  3. Adding RF capacity by install more BTS

Traffic which requested by subscribers is huge internet traffic so then need high link capacity to carry out them. It different with voice and messaging (SMS) services which has certainty capacity then Telecommunication Company can predict how much link capacity to carry out this service. Meanwhile data service (wireless internet services) will has unpredictable traffic more often they will has huge traffic during peak hour. As the result, utilization link to carry out traffic from subscriber to Public Data Serving Node (PDSN) – suppose on the CDMA platform – will always getting saturated. Telecommunication Company will take some action to resolve this issue e.g.

1. Adding E1 capacity or

2. Migrate to optical network

International Bandwidth very expensive and usually Telecommunication Company will consider many times to add more bandwidth capacity. It could be that no issue found on the RF capacity and the link network but more often they will experience lack of international bandwidth capacity especially during peak hour while many subscribers trying to access internet on mobile broadband internet service

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