# US 2014/0211740 A1 · Sounding reference signal transmission

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- Number: US 2014/0211740 A1
- Document ID: US20140211740A1
- Status: Published application
- Kind: A1
- Application number: 14/242,025
- Filed: 2014-04-01
- Published: 2014-07-31
- Earliest claimed: 2011-10-08
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Fredrik BERGGREN
- Web page: https://patentgrep.com/patent/US20140211740A1

## CPC

- H04W 52/18: TPC being performed according to specific parameters
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- 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

To facilitate transmission of a sounding reference signal (SRS) on an uplink carrier of a telecommunication system, a shifted SRS is created, wherein a predefined frequency domain position of a SRS is shifted for creation of the shifted SRS, thereby creating an extended SRS region including at least one additional RB being separate from the predefined frequency domain position of the SRS.

## Claims

### Claim 1

A method of facilitating transmission of a sounding reference signal (SRS) on an uplink carrier of a telecommunication system, comprising:
creating a shifted SRS, wherein a set of SRSs is predefined, each SRS from the set of SRSs having a predefined bandwidth and a predefined frequency domain position, the predefined frequency domain position including a set of resource blocks (RBs) being usable for transmission of a SRS on the uplink carrier, the set of RBs being smaller than a total set of RBs being available on the uplink carrier, and the predefined frequency domain position of a first SRS from the set of SRSs is shifted for creation of the shifted SRS, thereby creating an extended SRS region including at least one additional RB being separate from the predefined frequency domain position of the first SRS; and
transmitting the shifted SRS on the uplink carrier.

### Claim 2 (depends on 1)

The method of claim 1, wherein a number of RBs mSRS,0=NRBUL−Δ is usable for transmission of the first SRS on the uplink carrier, where Na is the total set of RBs being available on the uplink carrier, the number Δ being an integer greater than zero, Δ>0.

### Claim 3 (depends on 2)

The method of claim 2, wherein up to a number Δ+1 of different frequency domain positions nSTART=0,1, . . . , Δ for the shifted SRS are defined including all feasible frequency domain positions on the uplink carrier, at least one of the number Δ+1 of different frequency domain positions nSTART=0,1, . . . , Δ is utilized for transmission of the shifted SRS.

### Claim 4 (depends on 1)

The method of claim 1, wherein the at least one additional RB is unused for transmission of the first SRS.

### Claim 5 (depends on 1)

The method of claim 1, wherein two mutually disjoint sets of resource elements (REs) are usable for at least one frequency domain position of the shifted SRS.

### Claim 6 (depends on 5)

The method of claim 5, wherein the two mutually disjoint sets are made mutually disjoint by utilizing odd and even REs, respectively, within the extended SRS region.

### Claim 7 (depends on 5)

The method of claim 5, wherein the two mutually disjoint sets are made mutually disjoint by utilizing time division multiplexing (TDM).

### Claim 8 (depends on 1)

The method of claim 1, wherein the shifted SRS has a bandwidth being smaller than a maximal bandwidth predefined for SRS transmission in the system.

### Claim 9 (depends on 1)

The method of claim 1, wherein the first SRS has a bandwidth being smaller than a maximal bandwidth predefined for SRS transmission in the system.

### Claim 10 (depends on 1)

The method of claim 1, wherein the extended SRS region covers at least one RB being aligned with an edge RB of the total set of RBs being available on the uplink carrier.

### Claim 11 (depends on 1)

The method of claim 1, wherein the shifted SRS is aligned with the first RB of the total set of RBs being available on the uplink carrier.

### Claim 12 (depends on 1)

The method of claim 1, wherein the shifted SRS is aligned with the last RB of the total set of RBs being available on the uplink carrier.

### Claim 13 (depends on 1)

The method of claim 1, wherein the uplink carrier is free from transmission of a physical uplink control channel (PUCCH).

### Claim 14

A method of facilitating transmission of a sounding reference signal (SRS) on an uplink carrier of a telecommunication system, comprising:
providing a configuration instruction to an user equipment (UE) in the telecommunication system, the configuration instruction relating to creating a shifted SRS, wherein a set of SRSs is predefined, each SRS from the set of SRSs having a predefined bandwidth and a predefined frequency domain position, the predefined frequency domain position including a set of resource blocks (RBs) being usable for transmission of a SRS on the uplink carrier, the set of RBs being smaller than a total set of RBs being available on the uplink carrier, and the predefined frequency domain position of a first SRS from the set of SRSs is shifted for creation of the shifted SRS, thereby creating an extended SRS region including at least one additional RB being separate from the predefined frequency domain position of the first SRS; and
receiving the shifted SRS on the uplink carrier.

### Claim 15 (depends on 14)

The method of claim 14, wherein the at least one additional RB is unused for transmission of the first SRS.

### Claim 16 (depends on 14)

The method of claim 14, wherein two mutually disjoint sets of resource elements (REs) are usable for at least one frequency domain position of the shifted SRS.

### Claim 17 (depends on 16)

The method of claim 16, wherein the two mutually disjoint sets are made mutually disjoint by utilizing odd and even REs, respectively, within the extended SRS region.

### Claim 18 (depends on 14)

The method of claim 14, wherein the extended SRS region covers at least one RB being aligned with an edge RB of the total set of RBs being available on the uplink carrier.

### Claim 19 (depends on 14)

The method of claim 14, wherein the uplink carrier is free from transmission of a physical uplink control channel (PUCCH).

### Claim 20

A user equipment (UE), comprising:
a shift creating entity, being arranged for creating a shifted SRS, wherein a set of SRSs is predefined, each SRS from the set of SRSs having a predefined bandwidth and a predefined frequency domain position, the predefined frequency domain position including a set of resource blocks (RBs) being usable for transmission of a SRS on a uplink carrier, the set of RBs being smaller than a total set of RBs being available on the uplink carrier, and the predefined frequency domain position of a first SRS from the set of SRSs is shifted for creation of the shifted SRS, thereby creating an extended SRS region including at least one additional RB being separate from the predefined frequency domain position of the first SRS; and
a transmission entity, being arranged for transmitting the shifted SRS on the uplink carrier.
