PMN have now released their 4G LTE EPC software and its agnostic eNodeB capability.
The 4G LTE Private Mobile Network solution replicates a 4G cellular network in software and, along with one or more access points, allow the user to rapidly deploy a small scale network for a multitude of uses in a number of location.
PMN creates a self-contained, privately owned and managed mobile network based on standard 4G LTE protocols, providing the ability to access High Speed DATA services using mobile handsets over a private network.
PMN provides 4G LTE DATA
PMN can be used in a standalone solution to provide communications services between closed communities of users. Alternatively, it can be integrated directly to a carrier or company network for offsite calls. This allows companies to integrate cellular telephony into their enterprise IP-PBX infrastructure via SIP (Session Initiation Protocol), empowering staff with greater freedom and mobility around their site and reducing mobile call costs for calls made between individuals in the business. PMN can be installed as a 4G LTE only network or a combination of 2G GSM and/or 3G UMTS.
Business investment in legacy devices is protected while the need to add a wireless LAN infrastructure and employ new phones having multiple wireless interfaces in order to support an integrated IP-wireless solution for employees is avoided. In the private network, mobile handsets are used to make both internal and external calls and to send SMS messages if utilised in conjunction with either a 2G GSM or 3G UMTS PMN network.
This self-contained network can only be used with a PMN SIM’s (see the SIM Cards page for further information).
The PMN software runs on standard Intel server hardware. If the network environment is extended because of a merger or acquisition, then all new sites and communications systems can be incorporated into the same overall network architecture.
PMN comprises separate software components that together create an integrated switching environment which can be spread across several server platforms to provide resiliency and scale. The Three main components are MME (including CSFB), SGW and PGW collectively known as the Evolved Packet Core (EPC).
MME – Mobility Management Entity
The MME is the main component of the EPC playing an important role in LTE EPC architecture. In fact, MME is the main signalling node in the EPC and is responsible for initiating paging and authentication of the mobile device. MME retains location information at the tracking area level for each user and then selects the appropriate gateway during the initial registration process.
CSFB – Circuit Switch Fall Back
The PMN EPC (Evolved Packet Core) for 4G LTE is DATA only. To carry a traditional CS call the UE needs to fall back to either 2G or 3G to make or receive that call. CSFB has been standardised under 3GPP specification 23.272, this specification also allows for SMS to be carried without the handset having to fall-back to a different RAN. Applications allowing calls and SMS to be carried via PS are also available.
PGW – Packet DATA Network Gateway
PGW is responsible for all the IP packet based operations such as UE IP address allocation, IP and TCP/UDP header inspection, static policy rules are allowed to enable the use of dedicated bearers. It is also responsible in conjunction eNodeB for UL and DL rate enforcement based on APN-AMBR (Access Point Name – Aggregate Maximum Bit Rate). It is synonymous to GGSN of pre-release 8 networks.
SGW – Serving Gateway
SGW main responsibility is to route and forward user DATA packets, it would also be the mobility anchor for the user plane during inter-eNodeB handovers. SGW is monitoring and maintaining context information related to UE during its idle state.
4G is much more flexible than previous technologies. With 2G and 3G the amount of frequency the BTS/access point used is fixed, LTE supports a subset of bandwidths 1.4, 3, 5, 10, 15 and 20 MHz and can operate in both paired spectrum (in FDD mode, See the PMN tech specs for the full list of FDD bands) and unpaired spectrum (in TDD mode) which allows the operator/customer to make best use out of the available spectrum, this allows LTE access points to operate within spectrum bandwidths that would previously been too small for a 3G cell.
The amount of DATA throughput is relational to the amount of bandwidth in use, the greater the spectrum used the quicker the connection to the UE.
The below graph shows what’s possible over the range of supported Bandwidths.
|Frequency Bandwidth||UE Category||Downlink Peak (Mbps)||Uplink Peak|
*note downlink is 2×2 MIMO – these are peak figures and should be taken as best case.
To compare a typical 3G AP could have a peak downlink of 21 Mbps and a peak uplink of 5.7 Mbps.
- High DATA rates
- Rapid time to connect
- Reduced latency
- Seamlessly connect to existing PMN 2G and 3G networks