Dali Wireless, which markets a distributed radio system based on an element it terms the RF Router, has released a “High Density System” version of its product – offering 10Gbps throughput across 300MHz bandwidth on a single fibre.
Although at first sight similar in concept, Dali says it is different from Digital DAS products (such as Axell Wireless’ idDas ) because its RF Router takes RF signal and digitises and packetises it into IP, CPRI, or IP/CPRI-like packets. It then addresses and routes these radio packets to remote radio nodes, which then reassemble the packets and distribute them.
The company says that this architecture means it is the only company that can deliver a many-to-many relationship between base station sectors and the antenna, and is also well suited to the virtualisation of base station processing resources. This creation of an “IP pipe” also gives it the ability to plug IP modules such as Wi-Fi access points and video cameras to the remotes of the cellular network and offload the content to remote management centres through the IP backhaul.
Dali’s VP Business Development, Wolfgang Weber, a former CTO with Swisscom and Telefonica, said the HDS delivers 10Gbps/ 300MHz over a single fibre, and with system latency of 65ns, is capable of supporting MIMO. Currently, Dali’s system delivers 6Gbps at 170MHz bandwidth.
The RF Router architecture looks similar to Digital DAS systems, but can be much more flexible in terms of how signal is distributed, Weber claimed.
“If you really try to understand [Axell Wireless’] idDAS, you see it’s still a 1-2-1 relationship between one hub and one sector. Yes you can have one sector connected to multiple radios, but we can have many sectors to many radios. With a solution like iDDAS you cannot change capacity because you have one sector at your disposal. It’s a bit like if you turn on all the lights in a building, and can then selectively turn a couple off – that’s idDAS. Well, the RF Router brings additional lights where they are needed, that
