Method and apparatus for establishing a mapping between enhanced downlink control channel resource and antenna port

• US 10,009,880 B2
• Filed: 03/13/2015
• Issued: 06/26/2018
• Est. Priority Date: 09/14/2012
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wang, Jian, Wu, Qiang
• Primary Examiner(s): Nawaz, Asad
• Assistant Examiner(s): Ansari, Najeebuddin
• Application Number:
  US14/657,389
• Publication Number:
  US 20150189634A1
• Time in Patent Office: 1,201 Days
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/26035 Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences using different training sequence per antenna H04B7/0684; code allocation H04J13/16
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides a method and apparatus for establishing a mapping between an enhanced downlink control channel resource and an antenna port. The method includes: establishing a mapping between each resource element in an enhanced downlink control channel resource and an antenna port; and establishing a correspondence between control data carried by the resource element and an antenna port corresponding to the resource element, so as to send or receive, according to a reference signal corresponding to the antenna port, the control data carried by the resource element. The present invention determines a manner for establishing a mapping between a resource on an ePDCCH and an antenna port, and meets a requirement of LTE development.

Claims

1. A method for establishing a mapping between an enhanced downlink control channel resource and an antenna port, comprising:

establishing a mapping between each resource element carrying control data in an enhanced downlink control channel resource and an antenna port, wherein

the enhanced downlink control channel resource comprises multiple resource block pairs (PRB pairs), each of the multiple PRB pairs comprises multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and each of the multiple OFDM symbols corresponds to an OFDM symbol index, wherein

each of the multiple PRB pairs further comprises multiple subcarriers in a frequency domain, and each of the multiple subcarriers corresponds to a subcarrier index, wherein

resource elements carrying control data in odd-indexed OFDM symbols and odd-indexed subcarriers being mapped to a first antenna port,

resource elements carrying control data in odd-indexed OFDM symbols and even-indexed subcarriers being mapped to a second antenna port,

resource elements carrying control data in even-indexed OFDM symbols and even-indexed subcarriers being mapped to the first antenna port, and

resource elements carrying control data in even-indexed OFDM symbols and odd-indexed subcarriers being mapped to the second antenna port; and

sending, according to a reference signal corresponding to the first antenna port or the second antenna port, the control data carried by the resource element, wherein establishing the mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port is performed by each of the multiple PRB pairs, wherein the multiple PRB pairs have a same mapping between the resource element and the first antenna port or second antenna port.

2. The method for establishing a mapping between an enhanced downlink control channel resource and an antenna port according to claim 1, wherein establishing the mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port is performed by each of the multiple PRB pairs, each of the multiple PRB pairs corresponds to a PRB pair index, and the first antenna port or second antenna port mapped to the resource element in odd-indexed PRB pairs is opposite to that in even-indexed PRB pairs.

3. An apparatus, comprising:

at least one processor, configured to establish a mapping between each resource element carrying control data in an enhanced downlink control channel resource and an antenna port; and

a transmitter, configured to transmit the control data carried by the resource element according to a reference signal corresponding to the first antenna port or the second antenna port,

wherein

the enhanced downlink control channel resource comprises multiple resource block pairs (PRB pairs), each of the multiple PRB pairs comprises multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and each of the multiple OFDM symbols corresponds to an OFDM symbol index, wherein

each of the multiple PRB pairs further comprises multiple subcarriers in a frequency domain, and each of the multiple subcarriers corresponds to a subcarrier index, wherein

resource elements carrying control data in odd-indexed OFDM symbols and odd-indexed subcarriers being mapped to a first antenna port,

resource elements carrying control data in odd-indexed OFDM symbols and even-indexed subcarriers being mapped to a second antenna port,

resource elements carrying control data in even-indexed OFDM symbols and even-indexed subcarriers being mapped to the first antenna port, and

resource elements carrying control data in even-indexed OFDM symbols and odd-indexed subcarriers being mapped to the second antenna port,

wherein the at least one processor is further configured to establish a mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port on each of the multiple PRB pairs, wherein the multiple PRB pairs have a same mapping between the resource element and the first antenna port or second antenna port.

4. The apparatus according to claim 3, wherein the at least one processor is further configured to establish a mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port on each of the multiple PRB pairs, wherein

each of the multiple PRB pairs corresponds to a PRB pair index, and the first antenna port or second antenna port mapped to the resource element in odd-indexed PRB pairs is opposite to that in even-indexed PRB pairs.