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04-13-2020 12:51 PM (Last edited 04-20-2020 12:20 PM ) in
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Galaxy Techfluencer topic for the week: Carrier Aggregation
Carrier Aggregation (CA) is the ability to combine multiple carriers to expand the spectrum bandwidth. CA is a new feature of LTE Advanced which helps the users with increased data speeds (both in uplink and downlink).
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04-14-2020 03:01 PM (Last edited 04-16-2020 02:48 PM ) in
Tech TalkLTE Advanced Carrier Aggregation, CA, is one of the key techniques used to enable the very high data rates of 4G to be achieved and in this way increase the capacity of the link.
Carrier aggregation, CA requires many different features to be implemented to enable it to operate effectively, as the two channels are likely to have very different characteristics, especially if they are on different bands.
LTE aggregated carriers
When carriers are aggregated, each carrier is referred to as a component carrier. There are two categories:
Primary component carrier: This is the main carrier in any group. There will be a primary downlink carrier and an associated uplink primary component carrier.
Secondary component carrier: There may be one or more secondary component carriers.
There is no definition of which carrier should be used as a primary component carrier - different terminals may use different carriers. The configuration of the primary component carrier is terminal specific and will be determined according to the loading on the various carriers as well as other relevant parameters.
In addition to this the association between the downlink primary carrier and the corresponding uplink primary component carrier is cell specific. Again there are no definitions of how this must be organised. The information is signalled to the terminal of user equipment as part of the overall signalling between the terminal and the base station.
LTE carrier aggregation, CA, enables the most to be made of the available radio spectrum. Often bands are small as the availability of spectrum is limited in the sectors required and as a result many country administrations have released as much as they can but this may only be as small bands. Carrier aggregation seeks to be able to utilise this and large bands equally effectively.
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04-15-2020 03:52 AM in
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