Orange UK has partnered with Universal Music and 4Music (a derivative of the terrestrial TV Channel 4), to launch a free streaming music service for new tariff called ‘Monkey’. The tariff is for prepay customers, which makes the whole data consumption angle more interesting (prepay users are not usually looked after in terms of data usage!).
Users will be able to both create and share playlists on the web, and somewhat unsurprisingly will be sent Mobile Ads too. Luckily, as the ‘yoof’ market (which this tariff is squarely aimed at) is apparently accepting of this kind of thing, it should be no problem.
You’ll be able to get a bit of Monkey in Orange stores and Phones4U stores now, and then from September in other channels. Channel 4 will be doing its bit and promo-ing things across its various TV and Web properties.
Clearly Orange is aiming to target users who perhaps don’t have the high-tier smartphone-type handsets, and those who are unable to consume existing pay-for music services – so it’s going to be interesting to see how popular this is, and how it plays out. I wonder if Orange will release usage stats some months down the line?
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Discussions are again resurfacing about which technology should be used to improve coverage; Femtocells or UMA. Honestly, I have not been a big supporter of UMA (and you dont have to agree with me) and earlier this year when Nokia raised doubts about the technology, i stopped following it completely. Kineto has been the biggest supporter of UMA and is still carrying the torch.
Kineto recently
received over $15 million in investment from Motorola that it plans to use to increase its reach in UMA. Last month it had received
investment from NEC. One of the reasons for the resurgence could be because the UMA technology has matured since being used for some time. T-Mobile has already rolled
Hotspot @ Home using UMA. Also more phones are now available supporting UMA.
One of the drawbacks that will always be present in case of UMA is that special
handsets will be required that would support WiFi as
UMA is based on 802.11. This means more expensive phones and higher
consumption of power leading to smaller battery lives. One more problem with UMA is the interference due to other
ISM band devices and there are many technologies like Bluetooth, etc that are competing for the band.
The
drawback in case of Femtocells could be that their price is still quite high as complete Node B + RNC functionality is generally available in a Femtocell and at the same time all the aspects have not yet been standardised. Along with these,
Femtocells that use the same spectrum as that of the operator can cause interference with the Macro cell. This would in turn require very clever management of spectrum frequencies, etc.
A possible long term solution could be (but I dont see anyone agreeing to it right now) that phones with UMA technology become more common and a combined UMA + Femtocell equipment is rolled out by the operator. At the end user premises, depending on the strength of rf reception, the equipment can either use UMA or normal Femtocell functionality. If this idea is agreed upon, then there would still be couple of years before all interworking and other technological problems are ironed out.
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Fractional DPCH was added in Rel-6 to optimise the consumption of downlink channelization codes. When using HS-DSCH (High Speed Downlink Shared Channel), the main use for DL DPCH (also known as A-DPCH where A stands for Associated) is to carry power control commands (TPC bits) to the UE in order to adjust the uplink transmission. If all RBs (Radio Bearers) including SRBs (Signalling Radio Bearers) are mapped on to HS-DSCH then the DL codes are being wasted. SF 256 is used for A-DPCH and so every code being used by a user is seriously depleting the codes available for other UE’s. To overcome this F-DPCH is used so that multiple UE’s can share a single DL channelisation code. The limitation is 10 UEs in Rel-6.
For several users, the network configures each user having the same code but different frame timing and, thus, users can be transmitted on the single code source. The original timing is thus retained which avoids the need to adjust timings based on Release 99 power control loop implementation.
During slots where the DPCCH is not transmitted, the NodeB cannot estimate the uplink signal-to-interference ratio for power-control purposes and there is no reason for transmitting a power control bit in the downlink. Consequently, the UE shall not receive any power control commands on the F-DPCH in downlink slots corresponding to inactive uplink DPCCH slots.
There are some restrictions for FDPCH. It is not usable with services requiring data to be mapped to the DCH, such as AMR speech calls and CS video. Also, the lack of pilot information means that a method like feedback-based transmit diversity (closed loop mode) is not usable. The use of closed loop diversity is based on user-specific phase modification, wherein pilot symbols would be needed for verification of the phase rotation applied. On the other hand, when utilizing the F-DPCH, SRBs can benefit from high data rates of HSDPA and reduce service setup times remarkably
Finally, as you may have already figured out, by using F-DPCH the cell capacity has been improved and at the same time for same number of users, the interference has gone down significantly.
In Release 7, Rel-6 limitation has been removed. In R6, for a given UE in soft handover the TPC from all F-DPCH had to have the same offset timing. In R7, F-DPCH (TPC bits) can have different timing from different cells. This is possible due to introduction of 9 new F-DPCH slot formats (slot format 0 is the legacy F-DPCH slot format). The RRC signalling is done seperately for slot formats from the RNC to each of the cells.
You may also be interested in this Ericsson paper titled “The effect of F-DPCH on VoIP over HSDPA Capacity”. Available
here.
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Discussions are again resurfacing about which technology should be used to improve coverage; Femtocells or UMA. Honestly, I have not been a big supporter of UMA (and you dont have to agree with me) and earlier this year when Nokia raised doubts about the technology, i stopped following it completely. Kineto has been the biggest supporter of UMA and is still carrying the torch.
Fractional DPCH was added in Rel-6 to optimise the consumption of downlink channelization codes. When using HS-DSCH (High Speed Downlink Shared Channel), the main use for DL DPCH (also known as A-DPCH where A stands for Associated) is to carry power control commands (TPC bits) to the UE in order to adjust the uplink transmission. If all RBs (Radio Bearers) including SRBs (Signalling Radio Bearers) are mapped on to HS-DSCH then the DL codes are being wasted. SF 256 is used for A-DPCH and so every code being used by a user is seriously depleting the codes available for other UE’s. To overcome this F-DPCH is used so that multiple UE’s can share a single DL channelisation code. The limitation is 10 UEs in Rel-6.
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