Method and apparatus for long term evolution operation in unlicensed and shared spectrum for cloud radio access networks
There is provided a system, method, and interfaces for Radio Access Networks and Cloud Radio Access Networks.
1 . A system comprising:
a Baseband Unit (BBU) configured to calculate average occupancy ratios of all valid channel combinations and select a channel with a minimum occupancy ratio if a difference between two of the channels with a least average occupancy ratios is larger than a threshold, wherein the BBU is configured to calculate the channel combinations of channel f c * and channel f c ** of the valid channel combinations as
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{
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avg
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min
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+
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,
if
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>
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.
2 . The system of claim 1 , wherein the BBU is configured to select the channel with a minimum average RSSI from the two channels with lowest occupancy ratios when the difference between the two least average occupancy ratios is not larger than the threshold.
3 . A Baseband Unit (BBU) configured to calculate average occupancy ratios of all valid channel combinations and select a channel with a minimum occupancy ratio if a difference between two of the channels with a least average occupancy ratios is larger than a threshold, wherein a maximum number of unlicensed channels that a radio access network device is allowed to simultaneously transmit on is equal to or less than 4, and the maximum frequency separation between any two carrier center frequencies on which cellular transmissions allowed are less than or equal to 62 MHz.
4 . A method comprising:
calculating, by a Baseband Unit (BBU), average occupancy ratios of all valid channel combinations; and
selecting a channel with a minimum occupancy ratio if a difference between two least average occupancy ratios is larger than a threshold, wherein the method further comprises calculating, by the BBU, the channel combinations channel f c * and channel f c ** of the valid channel combinations as
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f
c
*
,
f
c
**
)
=
{
arg
min
f
c
∈
A
{
(
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(
f
c
1
)
+
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(
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c
2
)
2
)
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{
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avg
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1
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+
1
)
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if
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>
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.
5 . The method of claim 4 , further comprising: selecting, by the BBU, the channel with a minimum average RSSI from the two channels with lowest occupancy ratios when the difference between the two least average occupancy ratios is not larger than the threshold.
6 . A method of comprising:
calculating, by a Baseband Unit (BBU), average occupancy ratios of all valid channel combinations; and
selecting a channel with a minimum occupancy ratio if a difference between two least average occupancy ratios is larger than a threshold, wherein a maximum number of unlicensed channels that a radio access network device is allowed to simultaneously transmit on is equal to or less than 4, and the maximum frequency separation between any two carrier center frequencies on which transmissions allowed are less than or equal to 62 MHz.
7 . A system comprising:
means for calculating average occupancy ratios of all valid channel combinations in a cell and selecting a channel with a minimum occupancy ratio if a difference between two of the channels with a least average occupancy ratios is larger than a threshold, wherein the method further comprises calculating, by the BBU, the channel combinations channel f c * and channel f c ** of the valid channel combinations as
(
f
c
*
,
f
c
**
)
=
{
arg
min
f
c
∈
A
{
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c
1
)
+
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2
)
2
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,
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1
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+
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3
)
2
)
,
…
,
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4
)
+
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(
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5
)
2
)
}
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f
c
∈
A
{
P
_
avg
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c
min
,
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c
′
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)
,
P
_
avg
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c
min
+
1
,
f
c
′
min
+
1
)
}
,
if
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min
+
1
,
f
c
′
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+
1
)
-
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o
_
(
f
c
min
,
f
c
′
min
)
)
>
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o
ThGap
.
8 . The system of claim 7 , the means further comprising means for calculating the channel with a minimum average RSSI from the two channels with lowest occupancy ratios when the difference between the two least average occupancy ratios is not larger than the threshold.
9 . A system comprising:
means for calculating average occupancy ratios of all valid channel combinations in a cell; and
selecting a channel with a minimum occupancy ratio if a difference between two of the channels with a least average occupancy ratios is larger than a threshold, wherein a maximum number of unlicensed channels that a radio access network device is allowed to simultaneously transmit on is equal to or less than 4, and the maximum frequency separation between any two carrier center frequencies on which cellular transmissions allowed are less than or equal to 62 MHz.