METHOD FOR IMAGERING A PHYSICAL CHANNEL FOR DISPLAYING A HYBRID AUTOMATIC REPEAT REQUEST

Abstract

A method for mapping a physical hybrid automatic repeat request indicator channel, PHICH, in groups of a plurality of PHICHs, to orthogonal frequency division multiplexing, OFDM, symbols, each OFDM symbol comprising of a plurality of resource element groups, each resource element group being comprised of four resource elements, the method comprising: • determining indexes of resource element groups in which the PHICH is transmitted, the method being characterised in that said indexes are determined according to a cell identifier, ID, multiplied by the ratio n l i ' ' / n 0 ' or n l i ' ' / n 1 ' of the number n l i ' ' of available resource element groups in the OFDM symbol, having index l i ' , in which the i th repetition of the PHICH of a PHICH group is transmitted, i being an integer of 0 to 2, and the number n 0 ' or n 1 ' of available resource element groups in the first OFDM symbol, having index 0, of a sub-frame or in the second OFDM symbol, having index 1, of a subframe, the PHICH being transmitted through one, two or three OFDM symbols, wherein said indexes are determined according to the ratio n l i ' ' / n 0 ' when the PHICH is transmitted through one or three OFDM symbols, and wherein said indexes are determined according to the ratio n l i ' ' / n 1 ' when the PHICH is transmitted through two OFDM symbols and the first PHICH group is started from the second OFDM symbol, where the index l i ' = 0, if the PHICH is transmitted through one OFDM symbol, where the index l i ' = ( ⌊ m ' / 2 ⌋ + i + 1 ) m o d 2, m ' denoting an index of the PHICH group including the PHICH, if the PHICH is transmitted through two OFDM symbols, and where the index l i ' = i , if the PHICH is transmitted through three OFDM symbols, available resource element groups being resource element groups which can be used for PHICH transmission in the respective OFDM symbol, and • mapping the PHICH to the OFDM symbols according to the determined indexes.

Description

[0001] Regarding European patent EP 2 922 233 (DE 60 2009 049 574), the 2nd Senate (Voidance Senate) of the Federal Patent Court, based on the oral proceedings of 5 February 2025, has decided recognized as rightful: I. The European patent EP 2 922 233 is partially declared invalid with effect for the territory of the Federal Republic of Germany by amending its claims to read as follows:

Claims

[1] A method for mapping a physical hybrid automatic repeat request indicator channel, PHICH, in groups of a plurality of PHICHs, to orthogonal frequency division multiplexing, OFDM, symbols, each OFDM symbol comprising of a plurality of resource element groups, each resource element group being comprised of four resource elements, the method comprising: • determining indexes of resource element groups in which the PHICH is transmitted, the method being characterised in that said indexes are determined according to a cell identifier, ID, multiplied by the ratio nli'' / n0' or nli'' / n1' of the number nli'' of available resource element groups in the OFDM symbol, having index li', in which the i th repetition of the PHICH of a PHICH group is transmitted, i being an integer of 0 to 2, and the number n0' or n1' of available resource element groups in the first OFDM symbol, having index 0, of a sub-frame or in the second OFDM symbol, having index 1, of a subframe, the PHICH being transmitted through one, two or three OFDM symbols, wherein said indexes are determined according to the ratio nli'' / n0' when the PHICH is transmitted through one or three OFDM symbols, and wherein said indexes are determined according to the ratio nli'' / n1' when the PHICH is transmitted through two OFDM symbols and the first PHICH group is started from the second OFDM symbol, where the index li'=0, if the PHICH is transmitted through one OFDM symbol, where the index li'=(⌊m' / 2⌋+i+1) mod 2, m' denoting an index of the PHICH group including the PHICH, if the PHICH is transmitted through two OFDM symbols, and where the index li'=i, if the PHICH is transmitted through three OFDM symbols, available resource element groups being resource element groups which can be used for PHICH transmission in the respective OFDM symbol, and • mapping the PHICH to the OFDM symbols according to the determined indexes. [2] The method of claim 1, wherein, if the PHICH is transmitted through one or three OFDM symbols, the indexes of the resource element groups in which the PHICH is repeatedly transmitted three times are determined using the following equation: n¯i={(⌊NIDcell⋅n'li' / n'0⌋+m') mod n'li' i=0 (⌊NIDcell⋅n'li' / n'0⌋+m'+⌊n'li' / 3⌋) mod n'li' i=1 (⌊NIDcell⋅n'li' / n'0⌋+m'+⌊2n'li' / 3⌋) mod n'li' i=2 where NIDcell denotes a cell ID, i denotes an index of the repetition of the PHICH, n'li' / n'0 denotes the ratio between the number of available resource element groups in the OFDM symbol l'i and the number of available resource element groups in the first OFDM symbol of the sub-frame, and m' denotes an index of a PHICH group including the PHICH. [3] The method of claim 1, wherein, if the PHICH is transmitted through two OFDM symbols, the indexes of the resource element groups in which the PHICH is repeatedly transmitted three times are determined using the following equation: n¯i={(⌊NIDcell⋅n'li' / n'1⌋+m') mod n'li' i=0 (⌊NIDcell⋅n'li' / n'1⌋+m'+⌊n'li' / 3⌋) mod n'li' i=1(⌊NIDcell⋅n'li' / n'1⌋+m'+⌊2n'li' / 3⌋) mod n'li' i=2 Where NIDcell denotes a cell ID, i denotes an index of the repetition of the PHICH, n'li' / n'1 denotes the ratio between the number of available resource element groups in the OFDM symbol l'i and the number of available resource element groups in the second OFDM symbol of the sub-frame, and m' denotes an index of a PHICH group including the PHICH. [4] Base station of a multi-carrier cellular mobile communication system adapted for multiplexing signals transmitted to mobile stations, wherein the base station is adapted for carrying out a method according to any of claims 1 to 3. [5] Mobile station in a multi-carrier cellular mobile communication system, the mobile station being adapted to receive a multiplexed signal from the base station according to claim 4, the signal being formed using the method according to any of claims 1 to 3, the mobile station being further configured to decode the multiplexed signal received from the base station to receive an ACK / NACK transmitted through a PHICH in the multiplexed signal. [6] The mobile station of claim 5, further configured to determine indexes of resource element groups in which a PHICH is transmitted, wherein said indexes are determined as specified in any one of claims 1 to 3.