4G Americas Carrier Aggregation_FINALv1 0 (2)

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23 Yes Yes20 129 Yes Yes Yes39 Yes Yes YesCA_39A-41A40 041 YesNOTE 1: The CA Configuration refers to a combination of an operating band and a CA bandwidth classspecified in Table 5.6A-1 (the indexing letter). Absence of a CA bandwidth class for an operatingband implies support of all classes.NOTE 2: For each band combination, all combinations of indicated bandwidths belong to the set.NOTE 3: For the supported CC bandwidth combinations, the CC downlink and uplink bandwidths are equal.5. CA TECHNOLOGY DESCRIPTION5.1 CA BENEFITS AND PERFORMANCECA is an effective tool to combine together fragmented operator spectrum and deliver higher throughputswith a bigger spectrum pipe. However, CA has several additional benefits:Higher speeds: Aggregation of carriers increases spectrum resources, which provides higherspeeds across the cell coverage.Capacity gain: Aggregating multiple carriers increases spectrum but also includes trunking gainsfrom dynamically scheduling traffic across the entire spectrum. This in turn increases cell capacityand network efficiency and improves the experience for all users. A user previously facingcongestion on one carrier can be seamlessly scheduled on a carrier with more capacity andmaintain a consistent experience.Optimum utilization of an operator’s spectrum resources: The majority of operators havefragmented spectrum covering different bands and bandwidths, Carrier Aggregation helpscombine these into more valuable spectrum resource.Aggregation of spectrum resources in HetNet or LTE-Unlicensed scenarios generates newspectrum sources for operators. Licensed spectrum is in perpetually short supply, and evenwhen it is available, it is sometimes an expensive investment. CA enables operators to maximizethe return on those investments, as well as use unlicensed spectrum to supplement theirportfolios.The CA feature increases the bandwidth for a CA-capable UE by aggregating several LTE carriers,thereby increasing the UE’s bit rate. Each of the aggregated carriers is referred to as a CC. In order tokeep backward compatibility, the aggregation is based on Rel-8/Rel-9 carrier structure and so legacy UEsshould still be able to coexist with LTE-Advanced on at least part of the total bandwidth. Therefore, thecomponent carrier can have a bandwidth of 1.4, 3, 5, 10, 15 or 20 MHz.Even though LTE Rel-8 can support bandwidths up to 20 MHz, most American wireless operators do nothave that much contiguous spectrum. In spectrum below 2 GHz, most operators have 5-15 MHz ofcontiguous spectrum in a single frequency band. Also, many operators own the rights to use spectrum inmany different bands. So from a practical perspective, CA offers operators a path to combine spectrumassets within the bands they operate in and to combine assets across multiple frequency bands.Figure 5 shows the enhanced user experience that can be provided with CA by combining a single AWScarrier with a single 700 MHz carrier. Under lightly loaded conditions, CA devices can better utilizeresources on both component carriers, rather than being restricted to a single carrier block of spectrum.4G Americas LTE Carrier Aggregation October 2014 20
In this example, two carriers of spectrum are combined together to nearly double the median end userthroughput.Figure 5. User Performance Benefits of CA [6].Figure 6 further presents some lab results from CA testing showing the improvements of DL throughputdue to CA.Figure 6. Example of CA Lab Results from a U.S. Operator.4G Americas LTE Carrier Aggregation October 2014 21
Page 1 and 2: 4G Americas LTE Carrier Aggregation
Page 3 and 4: 6.7 CA for Roaming ................
Page 5 and 6: CA has also been designed to be a f
Page 7 and 8: agreement in 3GPP RAN4, CRs are for
Page 9 and 10: 41 2496 MHz 2690 2496 MHz 2690 MHz
Page 11 and 12: Carrier Aggregation bands in 3GPP R
Page 13 and 14: 4.3 CONTIGUOUS AND NON-CONTIGUOUS I
Page 15 and 16: Table 3. LTE CA Configurations and
Page 17 and 18: 4.4 INTER-BAND CAOperators typicall
Page 19: CA_4A-12ACA_4A-13ACA_4A-17ACA_4A-29
Page 23 and 24: CA offers a cell activation/deactiv
Page 25 and 26: In a CA scenario, mobility is prima
Page 27 and 28: edge LTE-Advanced UEs are assigned
Page 29 and 30: 6. CA DEPLOYMENT SCHEMES6.1 INTRA-B
Page 31 and 32: Site deployment for the low band ma
Page 33 and 34: utilization of spectrum resources -
Page 35 and 36: functionality will be in a minority
Page 37 and 38: The UE category defines a combined
Page 39 and 40: 1. Intra-band contiguous CA.2. Intr
Page 41 and 42: Option C: The UE performs ZIF 12 up
Page 43 and 44: the primary cell while when the CC
Page 45 and 46: 8.2 CA WITH LICENSED ASSISTED ACCES
Page 47 and 48: 8.4 CA FOR 5GThe 5 th generation ce
Page 49 and 50: [5] Daniel Larsson, “Boosting Dat
Page 51 and 52: 11. GLOSSARYThe following acronyms
Page 53: 12. ACKNOWLEDGEMENTSThe mission of

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