Lg Vx-8500 Why Not Lanuched

[HetalDP 947]

As Everybody was Questioning that VX-8000 was launched in India which dont have Expansion Card Support then why the dont have launched 8500 rather old 8000 in India. Here is some Explaination.

The LG 8300, 8400, 8500 and 8600 uses MEID instead of ESN. And All these Phone also dont have RUIM Suport. Now the Reason is MEID is not Supported by Reliance Network till Now.

MEID is 56 Bit or 14 Character Hex

ESN is 32 Bit or 8 Character Hex

Now There is a Solution of Puesdo ESN or pESN. Lets See What Reliance and Tata will do

I have also POsted a Topic reharding Expiring / Phasing out of ESN and Introduction of MEID.

pESN as a solution?

pESN presents the option for an MEID-equipped device to exist on a currently deployed CDMA network (e.g., a network conforming to IS-2000 Release 0 or IS-2000 Release A). Like a true ESN, a pESN is a 32-bit number. A pESN uses an eight-bit manufacturer ID code field that, by definition, is set to a fixed value of 0×80. In other words, one of the eight-bit manufacturer ID codes (0×80) from the overall ESN space is now reserved to indicate that a pESN is in use. The remaining 24 bits of a pESN are derived from the MEID programmed into the device. The least significant 24 bits of an SHA-1 digest[1] of the device's MEID are used to populate the lower 24 bits of the pESN (Figure 2).

Once a pESN is derived, an MEID-equipped device can use that pESN in any scenario where a true ESN would have been used, including over-the-air messaging sent to a network. Conversely, the CDMA network can use this same pESN to address messaging to the device. Because pESN is compatible with the existing structure of true ESNs, no changes are required to the currently deployed CDMA air interface.

Use of pESNs is unfortunately not without its problems, though. Since all pESNs use the manufacturer ID code of 0×80, there are only a little more than 16 million unique pESN values. This ensures that there will almost certainly be multiple devices deriving the same pESN. In a CDMA network, this creates the possibility of at least two problems:

ESNs have been a predominant method used by a network to address messaging to a mobile device. If multiple devices are operating with the same pESN, there is a chance that more than one of these devices might receive a mobile-directed message and respond to it.

In all CDMA networks deployed to date, a device's ESN is used to derive a public long code mask (PLCM). The PLCM is the coding used to separate multiple users transmitting reverse dedicated channels on the same frequency at the same time. Again, if multiple devices are operating with the same pESN, they would also derive the same PLCM, and if using reverse dedicated channels at the same time, there is a good chance the network will not be able to demodulate their reverse traffic. Of course, the chance of a collision is slim: a collision would only occur when two mobiles with the same pESN transmitted at the same time to the same base station. Statistically, though, some of those calls will be emergency calls, making this an unacceptable risk.

CDMA air interface technology already offers a solution to the first problem. While ESN addressing is one option available to networks, other options also exist. For example, by addressing messages with ESN plus international mobile station identifiers (IMSI), a network can ensure that no more than one mobile device will match a message's addressing fields.

The second problem, however, cannot be solved with existing CDMA deployments. To that end, a group of leading CDMA industry participants converged last February on a proposed solution to the PLCM collision problem. This proposed solution was summarized in CDG reference document 107, published in March 2005, and has subsequently undergone minor modifications. As of this article's writing, a final air interface definition for a proposed solution was on the verge of publication as 3GPP2 C.S0072 mobile station equipment identifier (MEID) support for cdma2000 spread spectrum systems, also to be known as TIA-1082.

[I_C_U 10]

Oh! So there is a technological barrier in launching advanced hand sets.

But with growth rate of 35-40% CAGR predicted in next 4 years the providers will have to quickly plan for upgradation.