5G Network Infrastructure to Drive Memory Diversity
Today’s cellphone networks aren’t your dad’s cellphone networks. In fact, 5G not only represents a vast leap in communications compared to the flip phone days of 3G, it’s also going to be more memory hungry.
For consumers, 5G brings with it the potential of a better user experience on smartphones, but its influence on memory uptake won’t be at the device level.
Handset makers will continue to add more DRAM and flash storage to smartphones regardless of network connections. The memory in 5G network infrastructure will be even more diverse given the many use cases for the next generation of mobile networking.
It makes sense when you think about how much computing power people are carrying around in their hands compared to even the early days of the Blackberry. Mobile networks are just as much about transmitting 4K video as they are talk and text. Connected devices not only include smartphones, but sensors, parking meters, smart cars, wearables, and utilities. Telecom infrastructure is now networking and compute infrastructure—flash and DRAM are supplanting SRAM and TCAM, and there might be room for emerging memories, too.
A high speed TCAM (ternary content-addressable memory) can search its entire contents in a single clock cycle and is faster than RAM. It’s a mainstay of networking gear, such as high-performance routers and switches, to increase the speed of route look-up, packet classification, packet forwarding and access control list-based commands. Despite its longevity, it is “exotic” in that it’s quite expensive and there are limited suppliers, according to Jim Handy, principal at Objective Analysis, but there’s solid payback from using them. “They streamline the routers. They make them far faster with less other processing hardware,” said Handy.
Conventional SRAM-based TCAM circuits are usually implemented with 16 CMOS transistors, which limits the storage capacity of TCAMs to tens of megabytes in standard memory structures. Handy believes that DRAM is a likely replacement in some applications as a gigabyte of commodity DRAM is costs about 1/100th as much as a high-speed SRAM.
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