Method and apparatus for communication and sensing in wireless communication network operating in half-duplex mode
Methods and apparatus are provided for integrated communication and sensing. For example, an electronic device may transmit a radio frequency (RF) pulse signal in the active phase of a periodic sensing cycle, and sense in the passive phase of the sensing cycle, a reflection of the RF pulse signal reflected from an object. The RF pulse signal is defined by a waveform for carrying communication data between electronic devices. The sensed RF pulse signal is at least a portion of the transmitted or reflected RF pulse signal, wherein the portion is equal to or greater than a threshold value for the object being within a sensing range of the first electronic device. The electronic device may also receive a communication signal from another electronic device during the passive phase.
1. A method comprising:
transmitting, by a first electronic device, a radio frequency (RF) sensing signal comprising a plurality of sensing cycles, each sensing cycle of the plurality of sensing cycles comprising a first sensing subcycle and a second sensing subcycle, the first sensing subcycle comprising a first active phase and a first passive phase, and the second sensing subcycle comprising a second active phase and a second passive phase.
2. The method of claim 1 , wherein a duration of the first active phase and a duration of the first passive phase are based on a first detectable distance, a second detectable distance, and a threshold value.
3. The method of claim 2 , wherein a ratio between the duration of the first passive phase and the duration of the first active phase is
t
p
(
1
)
t
a
(
1
)
,
and
t
p
(
1
)
t
a
(
1
)
≥
[
α
r
-
(
1
-
α
)
]
,
where t p (1) is the duration of the first passive phase, t a (1) is the duration of the first active phase, r is a ratio between the first detectable distance and the second detectable distance, and α is the threshold value.
4. The method of claim 1 , wherein a duration of the first active phase is different from a duration of the second active phase, or a duration of the first passive phase is different from a duration of the second passive phase.
5. The method of claim 4 , wherein the duration of the i th passive phase for an i th subcycle, t p (i), of each sensing cycle is defined by t p (i)=t p (1)(1+√{square root over (2)}) i-1 and the duration of the i th active phase for an i th subcycle, t a (i), of each sensing cycle is defined by t a (i)=t a (1)(1+√{square root over (2)}) i-1 .
6. The method of claim 5 , wherein t a (1)≤(2d min /c), where d min is a minimum detectable distance and c is the velocity of light.
7. The method of claim 5 , wherein the each sensing cycle comprises a number M of sensing subcycles, wherein
M
=
⌈
log
(
T
Se
t
a
(
1
)
+
2
+
1
)
log
(
2
+
1
)
⌉
-
1
,
where T Se is a duration of the each sensing cycle.
8. An apparatus comprising:
an electronic device configured to generate a radio frequency (RF) sensing signal comprising a plurality of sensing cycles, each sensing cycle of the plurality of sensing cycles comprising a first sensing subcycle and a second sensing subcycle, the first sensing subcycle comprising a first active phase and a first passive phase, and the second sensing subcycle comprising a second active phase and a second passive phase.
9. The apparatus of claim 8 , wherein a duration of the first active phase and a duration of the first passive phase are based on a first detectable distance, a second detectable distance, and a threshold value.
10. The apparatus of claim 9 , wherein a ratio between the duration of the first passive phase and the duration of the first active phase is
t
p
(
1
)
t
a
(
1
)
,
and
t
p
(
1
)
t
a
(
1
)
≥
[
α
r
-
(
1
-
α
)
]
,
where t p (1) is the duration of the first passive phase, t a (1) is the duration of the first active phase, r is a ratio between the first detectable distance and the second detectable distance, and α is the threshold value.
11. The apparatus of claim 8 , wherein a duration of the first active phase is different from a duration of the second active phase, or a duration of the first passive phase is different from a duration of the second passive phase.
12. The apparatus of claim 11 , wherein the duration of the i th passive phase for an i th subcycle, t p (i), of each sensing cycle is defined by t p (i)=t p (1)(1+√{square root over (2)}) i-1 and the duration of the i th active phase for an i th subcycle, t a (i), of each sensing cycle is defined by t a (i)=t a (1)(1+√{square root over (2)}) i-1 .
13. The apparatus of claim 12 , wherein t a (1)≤(2d min /c), where d min is a minimum detectable distance and c is the velocity of light.
14. The apparatus of claim 12 , wherein the each sensing cycle comprises a number M of sensing subcycles, wherein
M
=
⌈
log
(
T
Se
t
a
(
1
)
+
2
+
1
)
log
(
2
+
1
)
⌉
-
1
,
where T Se is a duration of the each sensing cycle.
15. A method comprising:
receiving, by a second electronic device, a radio frequency (RF) sensing signal comprising a plurality of sensing cycles, each sensing cycle of the plurality of sensing cycles comprising a first sensing subcycle and a second sensing subcycle, the first sensing subcycle comprising a first active phase and a first passive phase, and the second sensing subcycle comprising a second active phase and a second passive phase.
16. The method of claim 15 , wherein a duration of the first active phase and a duration of the first passive phase are based on a first detectable distance, a second detectable distance, and a threshold value.
17. The method of claim 16 , wherein a ratio between the duration of the first passive phase and the duration of the first active phase is
t
p
(
1
)
t
a
(
1
)
,
and
t
p
(
1
)
t
a
(
1
)
≥
[
α
r
-
(
1
-
α
)
]
,
where t p (1) is the duration of the first passive phase, t a (1) is the duration of the first active phase, r is a ratio between the first detectable distance and the second detectable distance, and α is the threshold value.
18. The method of claim 15 , wherein a duration of the first active phase is different from a duration of the second active phase, or a duration of the first passive phase is different from a duration of the second passive phase.
19. The method of claim 18 , wherein the duration of an i th passive phase for an i th subcycle, t p (i), of each sensing cycle is defined by t p (i)=t p (1)(1+√{square root over (2)}) i-1 and the duration of an i th active phase for an i th subcycle, t a (i), of each sensing cycle is defined by t a (i)=t a (1)(1+√{square root over (2)}) i-1 .
20. The method of claim 19 , wherein t a (1)≤(2d min /c), where d min is a minimum detectable distance and c is the velocity of light.
21. The method of claim 19 , wherein the each sensing cycle comprises a number M of sensing subcycles, wherein
M
=
⌈
log
(
T
Se
t
a
(
1
)
+
2
+
1
)
log
(
2
+
1
)
⌉
-
1
,
where T Se is a duration of the each sensing cycle.
22. An apparatus comprising:
an electronic device configured to receive a radio frequency (RF) sensing signal comprising a plurality of sensing cycles, each sensing cycle of the plurality of sensing cycles comprising a first sensing subcycle and a second sensing subcycle, the first sensing subcycle comprising a first active phase and a first passive phase, and the second sensing subcycle comprising a second active phase and a second passive phase.
23. The apparatus of claim 22 , wherein a duration of the first active phase and a duration of the first passive phase are based on a first detectable distance, a second detectable distance, and a threshold value.
24. The apparatus of claim 23 , wherein a ratio between the duration of the first passive phase and the duration of the first active phase is
t
p
(
1
)
t
a
(
1
)
,
and
t
p
(
1
)
t
a
(
1
)
≥
[
α
r
-
(
1
-
α
)
]
,
where t p (1) is the duration of the first passive phase, t a (1) is the duration of the first active phase, r is a ratio between the first detectable distance and the second detectable distance, and α is the threshold value.
25. The apparatus of claim 22 , wherein a duration of the first active phase is different from a duration of the second active phase, or a duration of the first passive phase is different from a duration of the second passive phase.
26. The apparatus of claim 25 , wherein the duration of the i th passive phase for an i th subcycle, t p (i), of each sensing cycle is defined by t p (i)=t p (1)(1+√{square root over (2)}) i-1 and the duration of the i th active phase for an i th subcycle, t a (i), of each sensing cycle is defined by t a (i)=t a (1)(1+√{square root over (2)}) i-1 .
27. The apparatus of claim 26 , wherein t a (1)≤(2d min /c), where d min is a minimum detectable distance and c is the velocity of light.
28. The apparatus of claim 26 , wherein the each sensing cycle comprises a number M of sensing subcycles, wherein
M
=
⌈
log
(
T
Se
t
a
(
1
)
+
2
+
1
)
log
(
2
+
1
)
⌉
-
1
,
where T Se is a duration of the each sensing cycle.