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Need and Benefits of Bandwidth Part (BWP)<\/p>\n\n\n\n
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Clearly, there is wider bandwidth available per carrier in 5G NR Radio Access. Wide bandwidth directly impacts the peak and user experienced throughput (data rates) which is one of the requirements in NR. However, since UEs (User Equipment) is not always demanding high data rates, the use of wide bandwidth may lead to higher idling power consumption both from RF and baseband signal processing perspectives. Most base stations can utilize the wider bandwidths available in 5G. UE capabilities, however, will vary and it will be more challenging for some UEs to use the larger available bandwidths. In this regard, the concept of BWP (Bandwidth Part) for NR provides a means of operating UEs with smaller bandwidth than the configured Cell bandwidth, which makes NR an energy-efficient solution despite the support of the wideband operation.
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What is Bandwidth Part (BWP)?
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Bandwidth is the amount of spectrum (set of Radio Frequencies) for a particular Radio Access Technology. 5G NR currently defines two ranges of Frequencies FR1 (ranging from 410 \u2013 7125 MHz) and FR2 (ranging from 24.25 \u2013 52.6 GHz). There are different operating bands within each frequency range. Bandwidths of different operating bands can vary from several MHz to a few GHz. A different set of radio frequencies are allocated to different mobile network operators from the operating bands. NR supports a range of channel (NR Carrier) bandwidths from 5 \u2013 400 MHz to have diverse frequency use scenarios at the same time limiting implementation complexity.
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As we know from the LTE Radio Access technique transmission bandwidth (Bandwidth used for uplink and downlink communication) in a cell is configured in the form of number Resource Blocks (RBs). Similarly, NR transmission bandwidth is configured for NR cells. gNodeB and UE in NR can support different transmission bandwidths. In LTE, the network informs the transmission bandwidth to the UE when UE camps on a cell. In NR, apart from transmission bandwidth, the network also informs the UE about the position and width of a BWP (Bandwidth Part).<\/p>\n\n\n\n
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\u201cBWP (Bandwidth Part) is a variable subset of UE specific bandwidth configured from entire transmission bandwidth (Bandwidth of an NR carrier), in a set of contiguous Resource Blocks (RBs)\u201d<\/p>\n\n\n\n
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With BWPs, the carrier can be subdivided and used for different purposes. BWP enables more flexibility in how resources are assigned in a given carrier. BWPs enable multiplexing of different signals and signal types for better utilization and adaptation of spectrum and UE power.
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Each 5G NR BWP has its own numerology, meaning that each BWP can be configured differently with its own signal characteristic, enabling more efficient use of the spectrum and more efficient use of power. This feature is good for integrating signals with different requirements. One BWP may have reduced energy requirements, while another may support different functions or services, and yet another may provide coexistence with other systems. This will help UEs to have multiple services on the available bandwidth through BWPs with optimum use of energy requirements. Also, BWP will support legacy 4G devices with new 5G devices on the same carrier.
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Let\u2019s quickly discuss how BWP gives flexibility for 5G communication in different scenarios.
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a) BWP supports reduced UE bandwidth capability. All those UEs that do not support high bandwidths can communicate in the system. This will enable backward compatibility for existing UEs or UEs that can handle narrow bandwidths.<\/p>\n\n\n\n <\/p>\n\n\n\n b) BWP supports reduced UE energy consumption.<\/p>\n\n\n\n <\/p>\n\n\n\n c) BWP support FDM (Frequency Division Multiplexing) of different numerologies. It supports multiplexing of different signals and signal types.<\/p>\n\n\n\n <\/p>\n\n\n\n d) BWP Supports Non-Contiguous Spectrum. We can have different BWPs in the entire Cell bandwidth and each can contain something unknown to other BWPs sharing the same carrier. <\/p>\n\n\n\n e) BWP supports forward compatibility. Extra bandwidth in the cell can be used for something that is not defined yet for future compatibility.<\/p>\n\n\n\n We shall discuss more numerologies, BWP Configuration for uplink and Downlink and Radio Resource Management for BWPs in our later posts. Welcome back to Learnizo Global. This post will give you an idea about a very basic feature of 5G NR (New Radio) radio access technology. BWP is included in many specifications developed by 3GPP for NR. Therefore, to understand 5G NR, it is very important to understand the basic concepts of BWP. We are going […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-105","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/posts\/105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/comments?post=105"}],"version-history":[{"count":6,"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/posts\/105\/revisions"}],"predecessor-version":[{"id":142,"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/posts\/105\/revisions\/142"}],"wp:attachment":[{"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/media?parent=105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/categories?post=105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learnizoglobal.com\/blog\/wp-json\/wp\/v2\/tags?post=105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/learnizoglobal.com\/blog\/wp-content\/uploads\/2021\/08\/image-1.png\")
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Till then stay safe and Happy Learning with Learnizo Global LLP.<\/p>\n","protected":false},"excerpt":{"rendered":"