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EP-4154485-B1 - SPECTRAL SHAPING WITH SPECTRUM EXTENSION FOR REFERENCE SIGNALS FOR WIRELESS NETWORKS

EP4154485B1EP 4154485 B1EP4154485 B1EP 4154485B1EP-4154485-B1

Inventors

  • PAJUKOSKI, KARI
  • TIIROLA, ESA

Dates

Publication Date
20260513
Application Date
20200522

Claims (13)

  1. A method comprising: receiving, by a user device from a network node, information indicating a set of frequency resources assigned to the user device for uplink transmission and a spectrum shaping configuration indicating at least spectrum shaping with spectrum extension for transmission of reference signals via the set of frequency resources; performing, by the user device, spectrum shaping with spectrum extension for a reference signal; and transmitting the spectrum shaped and extended reference signal via at least a portion of the set of frequency resources, wherein the receiving information comprises receiving, by the user device from the network node, information indicating at least the set of frequency resources for uplink transmission and the spectrum shaping configuration that indicates spectrum shaping without spectrum extension for data transmission and spectrum shaping with spectrum extension for reference signal transmission; the method further comprising: performing, by the user device, spectrum shaping without spectrum extension for a block of data; wherein the transmitting further comprises transmitting, by the user device, the spectrum shaped block of data via at least a portion of the set of frequency resources.
  2. The method of claim 1, wherein the receiving information comprises: receiving, by the user device from the network node, an uplink scheduling grant indicating at least the set of frequency resources for uplink transmission and the spectrum shaping configuration that indicates spectrum shaping without spectrum extension for data transmission and spectrum shaping with spectrum extension for reference signal transmission.
  3. The method of any of claims 1-2, wherein the performing spectrum shaping without spectrum extension for the block of data is performed based on at least one of the following: a time domain precoding or time domain filter, including at least one of a (1+D) or a (x 1 x) filter; a frequency domain filter; a raised cosine (RC) filter; a root raised cosine (RRC) filter; a truncated filter; or a filter adapted according to a frequency location on a carrier or a location within a frequency band or a location within a bandwidth part of the set of frequency resources assigned to the user device for uplink transmission.
  4. The method of any of claims 1-3, wherein the performing spectrum shaping with spectrum extension for the reference signal is performed based on at least one of the following: a frequency domain filter; a filter having a predefined roll-off; a raised cosine (RC) filter; a root raised cosine (RRC) filter; a truncated filter; or a filter adapted according to a frequency location on a carrier or a location within a frequency band or a location within a bandwidth part of the set of frequency resources assigned to the user device for uplink transmission.
  5. The method of any of claims 1-4, comprising: determining, based on the received spectrum shaping configuration, one or more parameters of a filter used by the user device to perform spectrum shaping.
  6. The method of any of claims 1-5, wherein the reference signal comprises at least one of: demodulation reference signals (DMRS); or sounding reference signals (SRS).
  7. An apparatus comprising means for performing the method of any of claims 1-6.
  8. A method comprising: transmitting, by a network node to a user device, information indicating a set of frequency resources assigned to the user device for uplink transmission and a spectrum shaping configuration indicating at least spectrum shaping with spectrum extension for transmission of reference signals via the set of frequency resources; and receiving, by the network node from the user device based on the sending, a spectrum shaped and extended reference signal via at least a portion of the set of frequency resources assigned to the user device, wherein the transmitting information comprises sending, by the network node to the user device, information indicating at least the set of frequency resources for uplink transmission and the spectrum shaping configuration that indicates spectrum shaping without spectrum extension for data transmission and spectrum shaping with spectrum extension for reference signal transmission; wherein the receiving further comprises receiving, by the network node from the user device, a spectrum shaped block of data via at least a portion of the set of frequency resources.
  9. The method of claim 8, wherein the transmitting information comprises: transmitting, by the network node to the user device, an uplink scheduling grant indicating at least the set of frequency resources for uplink transmission and the spectrum shaping configuration that indicates spectrum shaping without spectrum extension for data transmission and spectrum shaping with spectrum extension for reference signal transmission.
  10. The method of any of claims 8-9, wherein the reference signal comprises at least one of: demodulation reference signals (DMRS); or sounding reference signals (SRS).
  11. The method of any of claims 8-10, wherein the receiving the spectrum shaped and extended reference signal comprises: receiving the spectrum shaped and extended reference signal via a combination of both a subset of subcarriers within the set of frequency resources assigned to the user device, and one or more subcarriers that are beyond or outside of the set of frequency resources assigned to the user device.
  12. The method of any of claims 8-11 wherein the user device comprises a first user device, and wherein the set of frequency resources comprises a first set of frequency resources assigned to the first user device, and wherein the receiving the spectrum shaped and extended reference signal comprises: receiving, by the network node from the first user device, the spectrum shaped and extended reference signal via an interlaced frequency division multiplex (IFDM) comb using every nth subcarrier within the first set of frequency resources assigned to the first user device and one or more subcarriers of every nth subcarrier within a second set of frequency resources, wherein n is an integer greater than 1, wherein the second set of frequency resources is assigned to a second user device and is adjacent to the first set of frequency resources.
  13. An apparatus comprising means for performing the method of any of claims 8-12.

Description

TECHNICAL FIELD This description relates to wireless communications. BACKGROUND A communication system may be a facility that enables communication between two or more nodes or devices, such as fixed or mobile communication devices. Signals can be carried on wired or wireless carriers. An example of a cellular communication system is an architecture that is being standardized by the 3rd Generation Partnership Project (3GPP). A recent development in this field is often referred to as the long-term evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio-access technology . E-UTRA (evolved UMTS Terrestrial Radio Access) is the air interface of 3GPP's Long Term Evolution(LTE) upgrade path for mobile networks. In LTE, base stations or access points (APs), which are referred to as enhanced Node B (eNBs), provide wireless access within a coverage area or cell. In LTE, mobile devices, or mobile stations are referred to as user equipments (UE). LTE has included a number of improvements or developments. Aspects of LTE are also continuing to improve. 5G New Radio (NR) development is part of a continued mobile broadband evolution process to meet the requirements of 5G, similar to earlier evolution of 3G & 4G wireless networks. 5G is also targeted at the new emerging use cases in addition to mobile broadband. A goal of 5G is to provide significant improvement in wireless performance, which may include new levels of data rate, latency, reliability , and security. 5G NR may also scale to efficiently connect the massive Internet of Things (IoT) and may offer new types of mission-critical services. For example , ultra-reliable and low-latency communications (URLLC) devices may require high reliability and very low latency. 3GPP submission R1-1705332 discloses a terminal device configured to transmit data (in general) using spectrum shaping with spectral extension for the purposes of making best use of the available ('excess') bandwidth. US2020/076670A1 discloses in figure 18 and in paragraph [0310] a terminal device configured to transmit data using a first filter mode to perform frequency domain spectrum shaping and a demodulation reference signal using a second filter mode also to perform frequency domain spectrum shaping. SUMMARY In accordance with the present invention, there is provide methods and corresponding apparatus as claimed in the accompanying claims. The details of one or more examples of embodiments are set forth in the accompanying drawings and the description below. Other features will be apparent from the description and drawings, and from the claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a wireless network according to an example embodiment.FIG. 2 is a flow chart illustrating operation of a user device (UE) according to an example embodiment.FIG. 3 is a flow chart illustrating operation of a network node (e.g., BS, gNB)according to an example embodiment.FIG. 4 is a block diagram of a transmitter with frequency domain spectrum shaping without spectrum extension according to an example embodiment.FIG. 5 is a block diagram of a transmitter with time domain spectrum shaping without spectrum extension according to an example embodiment.FIG. 6 is a block diagram of a transmitter with frequency domain spectrum shaping with spectrum extension according to an example embodiment.FIG. 7 is a block diagram of a receiver according to an example embodiment.FIG. 8 is a diagram illustrating frequency domain spectrum shaping and spectrum extension according to an example embodiment.FIG. 9 is a block diagram of a wireless station, network node or wireless node (e.g., AP, BS, RAN node, UE or user device, or other wireless node or network node) according to an example embodiment. DETAILED DESCRIPTION FIG. 1 is a block diagram of a wireless network 130 according to an example embodiment. In the wireless network 130 of FIG. 1, user devices 131, 132, 133 and 135, which may also be referred to as mobile stations (MSs) or user equipment (UEs), may be connected (and in communication) with a base station (BS) 134, which may also be referred to as an access point (AP), an enhanced Node B (eNB), a BS, next generation Node B (gNB), a next generation enhanced Node B (ng-eNB), or a network node. The terms user device and user equipment (UE) may be used interchangeably. A BS may also include or may be referred to as a RAN (radio access network) node, and may include a portion of a BS or a portion of a RAN node (e.g., such as a centralized unit (CU) and/or a distributed unit (DU) in the case of a split BS). At least part of the functionalities of a BS (e.g., access point (AP), base station (BS) or (e)Node B (eNB), BS, RAN node) may also be carried out by any node, server or host which may be operably coupled to a transceiver, such as a remote radio head. BS (or AP) 134 provides wireless coverage within a cell 136, including to user devices (or UEs) 131, 132, 133 and 135. Although only four u