Cross-carrier spatial relation indication for semi-persistent sounding reference signal (SP-SRS) resources

Patent metadata

Field	Value
Publication number	US-12489596-B2
Application number	US-202418404527-A
Country	US
Kind code	B2
Filing date	Jan 4, 2024
Priority date	Apr 20, 2018
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

Embodiments include methods for a network node to activate semi-persistent sounding reference signal (SP-SRS) resources for transmission by a user equipment (UE). Such methods include sending, to the UE, a control message comprising configuration of a set of SP-SRS resources associated with a particular serving cell of the wireless communication network. Such methods include sending to the UE a further control message for activating the configured set of SP-SRS resources. The further control message includes information identifying an SP-SRS resource of the set of SP-SRS resources to be activated, and an indication of the identified SP-SRS resource's spatial relation with a further resource that is not associated with the particular serving cell. The indication comprising an identity of a further serving cell that is different from the particular serving cell and that is associated with the further resource. Other embodiments include complementary methods for a UE.

First claim

The invention claimed is:

1 . A method for a user equipment (UE) to transmit a semi-persistent sounding reference signal (SP-SRS) resource to a network node in a wireless communication network, the method comprising:
receiving, from the network node, a radio resource control (RRC) message comprising a configuration of a set of SP-SRS resources for transmission in a first serving cell of the wireless communication network; receiving, from the network node, a medium access control (MAC) control element (CE) message for activating the set of SP-SRS resources, the MAC CE message comprising: an identity of the set of SP-SRS resources to be activated, and
for a first SP-SRS resource of the set of SP-SRS resources, an indication of the first SP-SRS resource's spatial relation with a further resource associated with a second serving cell different from the first serving cell,
wherein the indication comprises an identifier of the further resource and an identifier of the second serving cell; and
transmitting the first SP-SRS resource using a same spatial domain filter as used to receive or transmit the further resource.

2 . The method of claim 1 , wherein the further resource is one of the following:
a synchronization signal/physical broadcast control channel block (SSB) resource; a channel state information reference signal (CSI-RS) resource; or a sounding reference signal (SRS) resource not included in the set of SP-SRS resources.

3 . The method of claim 1 , wherein:
the MAC CE message further comprises, for a second SP-SRS resource of the set of SP-SRS resources, an indication of the second SP-SRS resource's spatial relation with a second further resource associated with a further serving cell different from the first serving cell; the indication comprises an identifier of the second further resource and an identifier of the further serving cell; and the method further comprises transmitting the second SP-SRS resource using a same spatial domain filter as used to receive or transmit the second further resource.

4 . The method of claim 3 , wherein the further serving cell is one of the following: the second serving cell, or a third serving cell different from the second serving cell.

5 . A method for a network node, in a wireless communication network, to activate semi-persistent sounding reference signal (SP-SRS) resources for transmission by a user equipment (UE), the method comprising:
sending, to the UE, a radio resource control (RRC) message comprising a configuration of a set of SP-SRS resources for UE transmission in a first serving cell of the wireless communication network; and sending, to the UE, a medium access control (MAC) control element (CE) message for activating the set of SP-SRS resources, the MAC CE message comprising:
an identity of the set of SP-SRS resources to be activated, and
for a first SP-SRS resource of the set of SP-SRS resources, an indication of the first SP-SRS resource's spatial relation with a further resource associated with a second serving cell different from the first serving cell,
wherein the indication comprises an identifier of the further resource and an identifier of the second serving cell.

6 . The method of claim 5 , wherein the further resource is one of the following:
a synchronization signal/physical broadcast control channel block (SSB) resource; a channel state information reference signal (CSI-RS) resource; or a sounding reference signal (SRS) resource not included in the set of SP-SRS resources.

7 . The method of claim 5 , wherein:
the MAC CE message further comprises, for a second SP-SRS resource of the set of SP-SRS resources, an indication of the second SP-SRS resource's spatial relation with a second further resource associated with a further serving cell different from the first serving cell; and the indication comprises an identifier of the second further resource and an identifier of the further serving cell.

8 . The method of claim 7 , wherein the further serving cell is one of the following: the second serving cell, or a third serving cell different from the second serving cell.

9 . The method of claim 5 , further comprising receiving from the UE the first SP-SRS resource of the set of SP-SRS resources.

10 . A user equipment (UE) configured to transmit a semi-persistent sounding reference signal (SP-SRS) resource to a network node in a wireless communication network, the UE comprising:
transceiver circuitry configured for communicating with the network node; and processing circuitry operatively coupled to the transceiver circuitry, wherein the processing circuitry and the transceiver circuitry are configured to:
receive, from the network node, a radio resource control (RRC) message comprising a configuration of a set of SP-SRS resources for transmission in a first serving cell of the wireless communication network;
receive, from the network node, a medium access control (MAC) control element (CE) message for activating the set of SP-SRS resources, the MAC CE message comprising:
an identity of the set of SP-SRS resources to be activated, and
for a first SP-SRS resource of the set of SP-SRS resources, an indication of the first SP-SRS resource's spatial relation with a further resource associated with a second serving cell different from the first serving cell,
wherein the indication comprises an identifier of the further resource and an identifier of the second serving cell; and

transmit the first SP-SRS resource using a same spatial domain filter as used to receive or transmit the further resource.

11 . The UE of claim 10 , wherein the further resource is one of the following:
a synchronization signal/physical broadcast control channel block (SSB) resource; a channel state information reference signal (CSI-RS) resource; or a sounding reference signal (SRS) resource not included in the set of SP-SRS resources.

12 . The UE of claim 10 , wherein:
the MAC CE message further comprises, for a second SP-SRS resource of the set of SP-SRS resources, an indication of the second SP-SRS resource's spatial relation with a second further resource associated with a further serving cell different from the first serving cell; the indication comprises an identifier of the second further resource and an identifier of the further serving cell; and the processing circuitry and the transceiver circuitry are further configured to transmit the second SP-SRS resource using a same spatial domain filter as used to receive or transmit the second further resource.

13 . The UE of claim 12 , wherein the further serving cell is one of the following: the second serving cell, or a third serving cell different from the second serving cell.

14 . A network node configured to operate in a wireless communication network and to activate semi-persistent sounding reference signal (SP-SRS) resources for transmission by a user equipment (UE), the network node comprising:
a radio network interface configured for communicating with one or more UEs; and processing circuitry operatively coupled to the radio network interface, whereby the processing circuitry and the radio network interface are configured to:
send, to the UE, a radio resource control (RRC) message comprising configuration of a set of SP-SRS resources for UE transmission in a first serving cell of the wireless communication network; and
send, to the UE, a medium access control (MAC) control element (CE) message for activating the set of SP-SRS resources, the MAC CE message comprising:
an identity of the set of SP-SRS resources to be activated, and
for a first SP-SRS resource of t

Assignees

• Ericsson Telefon Ab L M

Inventors

• Grant Stephen
• Faxér Sebastian
• Tidestav Claes

Classifications

• H04B7/06952

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title

• H04W72/046

  the resource being in the space domain, e.g. beams · CPC title

• H04L5/0092

  Indication of how the channel is divided · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title