# US 2013/0155869 A1 · Method of Blind Decoding of Control Channel for a wireless communication system

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- Number: US 2013/0155869 A1
- Document ID: US20130155869A1
- Status: Published application
- Kind: A1
- Application number: 13/721,074
- Filed: 2012-12-20
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Assignees: HTC Corporation
- Inventors: Chih-Yao Wu
- Web page: https://patentgrep.com/patent/US20130155869A1

## CPC

- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method of blind decoding of a control channel for a wireless communication system comprising a network and a mobile device is disclosed. The network selects at least one of a plurality of control channels of at least one logical domain of control channel element, for transmitting control information to the mobile device, wherein the plurality of control channels of each logical domain are uniformly distributed over the logical domain. On the other side, the mobile device monitors all of the control channel candidates of each of the at least one logical domain of control channel element, for obtaining the control information which is transmitted from the network and configured to the mobile device, wherein all of the control channel candidates of each logical domain are uniformly distributed over the logical domain.

## Claims

### Claim 1

A method of blind decoding of a control channel for a wireless communication system comprising a network and a mobile device, the method comprising:
the network selecting at least one of a plurality of control channels of at least one logical domain of control channel element, for transmitting control information to the mobile device, wherein the plurality of control channels of each logical domain are uniformly distributed over the logical domain; and
the mobile device monitoring all of the control channel candidates of each of the at least one logical domain of control channel element, for obtaining the control information which is transmitted from the network and configured to the mobile device, wherein all of the control channel candidates of each logical domain are uniformly distributed over the logical domain.

### Claim 2 (depends on 1)

The method of claim 1, wherein for each logical domain, a control channel or a control channel candidate is in a position derived from the following equation:
L

{
(
Y
κ
+
⌊
m
*
N
ECCE
,
k
/
L
M
(
L
)
⌋
)

mod

⌊
N
ECCE
,
k
/
L
⌋
}
+
i
,
where the NECCE, k is the total number of control channel elements in the logical domain of a subframe k; m denotes the mth control channel or the mth control channel candidate and m has a value range from 0 to M(L); M(L) is the total number of control channels or control channel candidates for each logical domain; L is a corresponding aggregation level; i denotes the index of an occupied control channel element of the mth control channel or the mth control channel candidate and i has a value range from 0 to L−1; and Yk is a logical-domain-specific pseudo-random number.

### Claim 3 (depends on 2)

The method of claim 2, wherein the logical-domain-specific pseudo-random number Yk is defined by a function of a logical-domain-specific parameter and a slot number within a radio frame.

### Claim 4 (depends on 1)

The method of claim 1, wherein the logical domain is an ECCE (enhanced control channel elements) domain indexed by ECCE.

### Claim 5 (depends on 4)

The method of claim 4, wherein one ECCE comprises a plurality of EREGs (enhanced resource element groups) and each control channel or control channel candidate occupies at least one ECCE on the ECCE domain.

### Claim 6 (depends on 1)

The method of claim 1, wherein the control channel is an enhanced physical downlink control channel (EPDCCH).

### Claim 7 (depends on 1)

The method of claim 1, wherein the wireless communication system is Orthogonal Frequency-Division Multiple Access (OFDMA) system.

### Claim 8

A method of blind decoding of a control channel for a mobile device of a wireless communication system comprising a network and the mobile device, the method comprising:
monitoring all of control channel candidates of each of at least one logical domain of control channel element, for obtaining control information transmitted from the network and configured to the mobile device, wherein all of the control channel candidates of each logical domain are uniformly distributed over the logical domain.

### Claim 9 (depends on 8)

The method of claim 8, wherein for each logical domain, a control channel candidate is in a position derived from the following equation:
L

{
(
Y
κ
+
⌊
m
*
N
ECCE
,
k
/
L
M
(
L
)
⌋
)

mod

⌊
N
ECCE
,
k
/
L
⌋
}
+
i
,
where the NECCE, k is the total number of control channel elements in the logical domain of a subframe k; m denotes the mth control channel candidate and m has a value range from 0 to M(L); M(L) is the total number of control channel candidates for each logical domain; L is a corresponding aggregation level; i denotes the index of an occupied control channel element of the mth control channel candidate and i has a value range from 0 to L−1; and Yk is a logical-domain-specific pseudo-random number.

### Claim 10 (depends on 9)

The method of claim 9, wherein the logical-domain-specific pseudo-random number Yk is defined by a function of a logical-domain-specific parameter and a slot number within a radio frame.

### Claim 11 (depends on 8)

The method of claim 8, wherein the logical domain is an ECCE (enhanced control channel elements) domain indexed by ECCE.

### Claim 12 (depends on 11)

The method of claim 11, wherein one ECCE comprises a plurality of EREGs (enhanced resource element groups) and each control channel candidate occupies at least one ECCE on the ECCE domain.

### Claim 13 (depends on 8)

The method of claim 8, wherein the control channel is an enhanced physical downlink control channel (EPDCCH).

### Claim 14

A method of blind decoding of a control channel for a network of a wireless communication system comprising the network and a mobile device, the method comprising:
selecting at least one of a plurality of control channels of at least one logical domain of control channel element, for transmitting control information to the UE, wherein the plurality of control channels of each logical domain are uniformly distributed over the logical domain.

### Claim 15 (depends on 14)

The method of claim 14, wherein for each logical domain, a control channel is in a position derived from the following equation:
L

{
(
Y
κ
+
⌊
m
*
N
ECCE
,
k
/
L
M
(
L
)
⌋
)

mod

⌊
N
ECCE
,
k
/
L
⌋
}
+
i
,
where the NECCE, k is the total number of control channel elements in the logical domain of a subframe k; m denotes the mth control channel and m has a value range from 0 to M(L); M(L) is the total number of control channels for each logical domain; L is a corresponding aggregation level; i denotes the index of an occupied control channel element of the mth control channel and i has a value range from 0 to L−1; and Yk is a logical-domain-specific pseudo-random number.

### Claim 16 (depends on 14)

The method of claim 14, wherein the logical domain is an ECCE (enhanced control channel elements) domain indexed by ECCE.

### Claim 17 (depends on 16)

The method of claim 16, wherein one ECCE comprises a plurality of EREGs (enhanced resource element groups) and each control channel occupies at least one ECCE on the ECCE domain.

### Claim 18 (depends on 14)

The method of claim 14, wherein the control channel is an enhanced physical downlink control channel (EPDCCH).