This blog is by Anna-Kaarina Pietilä from the Networks business of Nokia.
If you’ve stood shoulder to shoulder on a crowded rush hour metro train, you’ll understand how difficult it can be to do anything useful during the ride. A sea of elbows and bags prevents you from opening your newspaper easily. Maybe you feel uncomfortable reading your smartphone messages when other passengers can see them too.
This is just how it is when there is interference in mobile networks. In fact, interference created by high densities of small cells and macro cells is one of the key challenges when deploying heterogeneous networks (HetNets) to meet growing demand for mobile broadband services.
HSPA+ HetNets can significantly boost downlink and uplink throughputs and provide higher network capacity. Minimizing interference and coordinating traffic between cells of different sizes in a HetNet is notoriously complex, but there are solutions available to take care of this issue, ensuring a great customer experience. Various 3GPP standardized enhancements are becoming available to make sure that devices are always connected to the best available cell.
Typical HetNet solutions include:
• Increasing the user equipment bias towards the small cells, increasing the offloading range and hence gaining from improved capacity created by small cells
• Decreasing the receiver sensitivity of small cells and lowering the uplink scheduling grant of macro cell devices close to small cells. This mitigates potential interference from those devices – interference which has a detrimental effect on the overall system performance
• Decoupling the role of uplink and downlink serving (control) nodes
All these solutions enable the full use of benefits provided by HetNets and further enhance the gains achievable through known transmission schemes such as HSDPA Multiflow.
New white paper
To learn more about these Nokia enhancements and how to best exploit an HSPA+ HetNet, check out our new white paper: Setting up HSPA+ heterogeneous networks for the best customer experience.
A successful HetNet deployment must meet several challenges that simply do not arise with homogeneous networks. Download the white paper to understand why and what to do to meet the challenges.
We have more to share on the topic here: WCDMA/HSPA.
To share your thoughts on the topic, join the discussion with @NSNtweets using #NSNperformance #3GPP #mobilebroadband #WCDMA #FutureWorks #Nokia.