# US 2019/0246397 A1 · Method and apparatus for determining control channel search space

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- Number: US 2019/0246397 A1
- Document ID: US20190246397A1
- Status: Published application
- Kind: A1
- Application number: 16/387,137
- Filed: 2019-04-17
- Published: 2019-08-08
- Earliest claimed: 2012-11-01
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Zhenfei TANG
- Web page: https://patentgrep.com/patent/US20190246397A1

## CPC

- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 48/16: Discovering, processing access restriction or access information
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04W 48/12: using downlink control channel
- Y02D 30/70: in wireless communication networks
- 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)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Embodiments of the present disclosure provide a method for detecting downlink control information. The method includes: determine a parameter A(c), according to an index number c of a physical resource set; determine a search space associated with the physical resource set, according to the parameter A(c), wherein the parameter A(c)=39827 if the index number c is a first index number, the parameter A(c)=39829 if the index number c is a second index number; detecting in the search space, downlink control information from a base station.

## Claims

### Claim 1

A method comprising:
determining, according to an index number c of a physical resource set, a parameter A(c);
determining, according to the parameter A(c), a search space associated with the physical resource set, wherein the parameter A(c)=39827 if the index number c is a first index number, the parameter A(c)=39829 if the index number c is a second index number; and
detecting, in the search space, downlink control information.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the first index number is 0, and the second index number is 1.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the determining, according to the parameter A(c), the search space associated with the physical resource set comprises:
determining, according to the parameter A(c), a parameter Yk(c) corresponding to the physical resource set in time unit k; and
determining, according to the parameter Yk(c), the search space associated with the physical resource set;
wherein the parameter Yk(c) satisfies a following relationship:
Yk(c)=(A(c)·Yk−1(c)) mod 65537
wherein Y−1=nRNTI≠0, nRNTI is an identifier of a terminal device, and the time unit comprises 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the time unit k is subframe k.

### Claim 5 (depends on 3)

The method according to claim 3, wherein the parameter Yk(c) is a location offset of the search space.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the parameter A(c)=39839 if the index number c is a third index number.

### Claim 7

An apparatus, comprising:
at least one processor; and
a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the at least one processor to:
determine, according to an index number c of a physical resource set, a parameter A(c);
determine, according to the parameter A(c), a search space associated with the physical resource set, wherein the parameter A(c)=39827 if the index number c is a first index number, the parameter A(c)=39829 if the index number c is a second index number; and
detect in the search space, downlink control information.

### Claim 8 (depends on 7)

The apparatus according to claim 7, wherein the first index number is 0, and the second index number is 1.

### Claim 9 (depends on 7)

The apparatus according to claim 7, wherein the programming instructions instruct the at least one processor to:
determine, according to the parameter A(c), a parameter Yk(c) corresponding to the physical resource set in time unit k; and
determine, according to the parameter Yk(c), the search space associated with the physical resource set;
wherein the parameter Yk(c) satisfies a following relationship:
Yk(c)=(A(c)·Yk−1(c)) mod 65537
wherein Y−1=nRNTI≠0, nRNTI is an identifier of the user equipment, and the time unit k comprises 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols.

### Claim 10 (depends on 9)

The apparatus according to claim 9, wherein the time unit k is subframe k.

### Claim 11 (depends on 9)

The apparatus according to claim 9, wherein the parameter Yk(c) is a location offset of the search space.

### Claim 12 (depends on 7)

The apparatus according to claim 7, wherein the parameter A(c)=39839 if the index number c is a third index number.

### Claim 13 (depends on 7)

The apparatus according to claim 7, wherein the physical resource set is one of at least two physical resource sets.

### Claim 14

A non-transitory computer-readable storage medium, storing programming instructions for execution by at least one processor, wherein the programming instructions instruct the at least one processor to:
determine, according to an index number c of a physical resource set, a parameter A(c);
determine, according to the parameter A(c), a search space associated with the physical resource set, wherein the parameter A(c)=39827 if the index number c is a first index number, the parameter A(c)=39829 if the index number c is a second index number; and
detect in the search space, downlink control information.

### Claim 15 (depends on 14)

The medium according to claim 14, wherein the first index number is 0, and the second index number is 1.

### Claim 16 (depends on 14)

The medium according to claim 14, wherein the programming instructions instruct the at least one processor to:
determine, according to the parameter A(c), a parameter Yk(c) corresponding to the physical resource set in time unit k; and
determine, according to the parameter Yk(c), the search space associated with the physical resource set;
wherein the parameter Yk(c) satisfies a following relationship:
Yk(c)=(A(c)·Yk−1(c)) mod 65537
wherein Y−1=nRNTI≠0, nRNTI is an identifier of the user equipment, and the time unit k comprises 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols.

### Claim 17 (depends on 16)

The medium according to claim 16, wherein the time unit k is subframe k.

### Claim 18 (depends on 16)

The medium according to claim 16, wherein the parameter Yk(c) is a location offset of the search space.

### Claim 19 (depends on 14)

The medium according to claim 14, wherein the parameter A(c)=39839 if the index number c is a third index number.

### Claim 20 (depends on 14)

The medium according to claim 14, wherein the physical resource set is one of at least two physical resource sets.