System and method for single downlink control information simultaneous space division multiplexing physical uplink shared channel transmission using single sounding reference signal resource set

Abstract

Systems and methods for single downlink control information (DCI)-based simultaneous physical uplink shared channel (PUSCH) transmission with space division multiplexing (SDM) using a sounding reference signal (SRS) resource set are disclosed herein. The SRS resource set may be an exclusive (e.g., a single) SRS resource set for non-codebook or codebook-based simultaneous physical uplink shared channel (PUSCH) operation. In each case, a user equipment (UE) transmits SRS resources of the set of SRS resources, receives DCI from a network that schedules a first PUSCH transmission on a first UE panel and a simultaneous second PUSCH transmission on a second UE panel, and then transmits the (simultaneous) PUSCH transmission as scheduled. Related network side functionality is also discussed. In some cases, SRS resources (and / or one or more SRS ports used by the SRS resources) are mapped to a particular UE panel. In other cases, the SRS resources use two UE panels.

Description

Technical Field

[0001] The present application generally relates to wireless communication systems, including wireless communication systems using either / both codebook-based PUSCH operation and non-codebook-based PUSCH operation. Background Art

[0002] Wireless mobile communication technologies use various standards and protocols to send data between base stations and wireless communication devices. For example, wireless communication system standards and protocols may include the Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard for wireless local area networks (WLANs) (commonly referred to within industry organizations as WLANs). ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols may use various radio access networks (RANs) to communicate between base stations of the RAN (which may also sometimes be referred to as RAN nodes, network nodes, or simply nodes) and wireless communication devices referred to as user equipment (UE). 3GPP RANs may include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN may use one or more radio access technologies (RATs) to perform communications between base stations and UEs. For example, GERAN implements GSM and / or EDGE RAT, UTRAN implements Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RAT, E-UTRAN implements LTE RAT (sometimes referred to as LTE), and NG-RAN implements NR RAT (sometimes referred to herein as 5G RAT, 5G NR RAT, or NR). In some deployments, E-UTRAN may also implement NR RAT. In some deployments, NG-RAN may also implement LTE RAT.

[0005] The base stations used by the RAN may correspond to the RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly denoted as an evolved Node B, enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (sometimes also referred to as a g-Node B or gNB).

[0006] The RAN provides communication services together with external entities through its connection with the Core Network (CN). For example, E-UTRAN may utilize the Evolved Packet Core (EPC) and NG-RAN may utilize the 5G Core Network (5GC).

[0007] The frequency bands of 5G NR can be divided into two or more different frequency ranges. For example, frequency range 1 (FR1) may include frequency bands operating at frequencies below 6 gigahertz (GHz), some of which are available for use by previous standards and can potentially be expanded to cover new spectrum products from 410 megahertz (MHz) to 7125MHz. Frequency range 2 (FR2) may include frequency bands from 24.25GHz to 52.6GHz. It should be noted that in some systems, FR2 may also include frequency bands from 52.6GHz to 71GHz (or higher). The frequency bands in the millimeter wave (mmWave) range of FR2 may have smaller coverage than the frequency bands in FR1 but potentially higher available bandwidth. The technician will recognize that these frequency ranges provided by way of example may change over time or region. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] To easily identify the discussion of any particular element or action, the most significant digit(s) in a reference number refers to the drawing number that first introduces the element.

[0009] Figure 1 A diagram corresponding to simultaneous transmission of multiple PUSCHs from multiple panels of a UE to a network according to an embodiment is illustrated.

[0010] Figure 2 An SRS resource set having SRS resources arranged in pairs according to an embodiment of this document is illustrated.

[0011] Figure 3 An SRS resource set having SRS resources arranged in subsets according to embodiments herein is illustrated.

[0012] Figure 4 A diagram showing various precoding matrices that may be indicated in a DCI is illustrated.

[0013] Figure 5 A method of a UE according to an embodiment of this document is illustrated.

[0014] Figure 6 A method of a RAN according to an embodiment of the present invention is illustrated.

[0015] Figure 7 A method of a UE according to an embodiment of this document is illustrated.

[0016] Figure 8A method of a RAN according to an embodiment of the present invention is illustrated.

[0017] Fig. 9 An example architecture of a wireless communication system according to embodiments disclosed herein is illustrated.

[0018] Fig.10 A system for performing signaling between a wireless device and a network device according to embodiments disclosed herein is illustrated. DETAILED DESCRIPTION

[0019] Various embodiments are described with respect to UE. However, reference to UE is provided for illustrative purposes only. The example embodiments may be used with any electronic component that can establish a connection with a network and is configured with hardware, software, and / or firmware for exchanging information and data with the network. Therefore, UE as described herein is used to represent any suitable electronic component.

[0020] In some deployments, NR uplink (UL) operation supports two multiple-input multiple-output (MIMO) operation modes using up to 4 layers.

[0021] In addition, in some deployments, codebook-based UL operation may be supported. In some such cases, a sounding reference signal (SRS) resource set having one or more SRS resources for UL channel sounding may be used for codebook-based UL operation (e.g., an SRS resource set with usage = "codebook"). When using an SRS resource set for UL channel sounding, the UE sends each of the SRS resources of the set using multiple ports. Based on its reception of these SRS resources, the network schedules a physical uplink shared channel (PUSCH) by indicating one of the SRS resources using an SRS resource indicator (SRI), and additionally provides a transmit precoding matrix indicator (TPMI) for the precoding matrix that the UE will apply together with the SRS port used to send the PUSCH, and a corresponding rank indication (RI). The UE sends the PUSCH according to the port configuration used by the indicated SRS.

[0022] In some cases, an SRS resource set with one or more SRS resources for UL channel sounding may be used for non-codebook based UL operation (e.g., an SRS resource set with usage = "non-codebook"). When using an SRS resource set for UL channel sounding, the UE transmits each SRS resource using a single SRS port. Based on its reception of these SRS resources, the network schedules a PUSCH by indicating one of the SRS resources / SRS ports using an SRI. The UE then transmits a PUSCH on the port of the indicated SRS resource.

[0023] Figure 1A diagram 100 is illustrated corresponding to simultaneous transmission of multiple PUSCHs 108, 110 from multiple panels 114, 116 of a UE 112 to a network 106 according to an embodiment. In the case where NR needs to support simultaneous transmission of PUSCHs, there may be two ways for simultaneous transmission of PUSCHs, spatial division multiplexing (SDM) and frequency division multiplexing (FDM).

[0024] In SDM, each of the multiple PUSCHs is transmitted simultaneously by the UE. In addition, each of the multiple PUSCHs uses the same (or at least overlapping) frequency resources. Therefore, diagram 100 illustrates, under SDM visualization 102, that a first PUSCH 108 and a second PUSCH 110 are transmitted simultaneously and using the same frequency resources. The spatial transmission characteristics are set differently for each of the PUSCHs (e.g., at each UE panel 114, 116) to allow the PUSCHs to be distinguished at the network.

[0025] In FDM, each of the multiple PUSCHs is transmitted by the UE simultaneously but using non-overlapping frequency resources. Thus, diagram 100 shows, under FDM visualization 104, that a first PUSCH 108 and a second PUSCH 110 are sent simultaneously but using different sets of frequency resources. The network may distinguish the multiple PUSCHs based on their different frequency ranges.

[0026] As shown, one way in which a UE may transmit simultaneous PUSCHs is via the use of multiple UE panels. For example, diagram 100 illustrates that a first PUSCH 108 is sent by a first UE panel 114 to a network 106, and a second PUSCH 110 is sent by a second UE panel 116 to the network 106. In the case of FDM, it is possible that each of the UE panels is configured to transmit in a frequency range corresponding to the PUSCH associated therewith. In the case of SDM, it is possible that each of the UE panels is configured to transmit in the same frequency range, but has different spatial characteristics for their corresponding PUSCHs.

[0027] Embodiments herein contemplate simultaneous (e.g., simultaneous multi-plane (STxMP)) PUSCH transmissions based on downlink control information (DCI) using SDM. Compared to FDM, SDM allows a UE to use multiple UE planes to increase the maximum number of layers that can transmit PUSCH, which may ultimately provide a higher peak data rate for UL communications. In some cases described herein, a simultaneous PUSCH transmission method based on a single DCI codebook is used. In cases involving the use of one, more or all of inter-coherent coding, partially inter-coherent coding, and / or non-inter-coherent coding, an embodiment of a simultaneous PUSCH transmission method based on a single DCI codebook may be assumed and / or operated. In other cases described herein, a simultaneous PUSCH transmission method based on a single DCI non-codebook is used.

[0028] Finally, under the single DCI codebook-based or single DCI non-codebook-based simultaneous PUSCH transmission method described herein, the SRS resource set configured to the UE may be an SRS resource set that is an exclusive SRS resource set for simultaneous PUSCH transmission. This means that in such a case, the SRS resource set is the only SRS resource set corresponding to simultaneous PUSCH transmission used at the UE.

[0029] Therefore, in the embodiments discussed herein, it is expected that an SRS resource set is sent from the UE to the network. Based on the received SRS resources of the SRS resource set, the network prepares and transmits to the UE a single DCI scheduling simultaneous PUSCH transmissions (e.g., one PUSCH transmission on each of the two UE panels). The DCI may indicate one or more of the SRS resources. The UE accordingly prepares and transmits the scheduled PUSCH transmissions on its corresponding UE panel, wherein the characteristics of such PUSCH are based on any corresponding SRS resources indicated in the DCI.

[0030] Exclusive SRS resource set implementation for codebook-based simultaneous PUSCH operation

[0031] In a first implementation of single DCI codebook based simultaneous PUSCH transmission with SDM, it is possible that the exclusive SRS resource set for simultaneous PUSCH transmission configured at the UE is codebook based (eg, using = "codebook").

[0032] In the first option under the first implementation, it is possible that the number of SRS resources in the SRS resource set is greater than 2 when the UE is not configured for full power transmission mode 2. In addition, the number of SRS resources in the SRS resource set is greater than 4 when the UE is configured for full power transmission mode 2.

[0033] The values ​​2 and 4 as described herein may be as specified in a definition for a wireless communication system that does not perform simultaneous PUSCH transmissions as discussed herein. It will be appreciated that the additional number of SRS resources in an SRS resource set beyond that provided in such a definition provides additional flexibility for a UE in performing SRS sounding across multiple UE panels beyond the flexibility provided under more restrictive definitions for other wireless communication systems.

[0034] In some cases, when the UE is configured to not use full power transmission mode 2, the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation may be 4 (this may be twice the definition of other wireless communication systems that do not implement simultaneous PUSCH operation, in which case the other wireless communication systems may use an SRS resource set with two resources). In addition, in some cases, when the UE is configured to use full power transmission mode 2, the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation may be 8 (this may be twice the definition of other wireless communication systems that do not implement simultaneous PUSCH operation, in which case the other wireless communication systems may use an SRS resource set with four resources).

[0035] As a second option under the first implementation, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation matches the maximum number of SRS resources defined for a wireless communication system that does not implement simultaneous PUSCH operation.

[0036] In a second implementation of simultaneous PUSCH transmission based on a single DCI codebook with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is codebook based. In addition, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation matches the maximum number of SRS resources defined for a wireless communication system that does not implement simultaneous PUSCH operation. Finally, it is possible that the second implementation corresponds to the case where a non-coherent codebook or a partially coherent codebook is used.

[0037] Under the second embodiment, in order to use a number N of transmit (Tx) ports across two UE panels, it is assumed that each UE panel has N / 2 coherent Tx ports. In addition, it is assumed that the Tx ports found on different UE panels are non-coherent. Then, for one or more SRS resources corresponding to an SRS resource set transmitted using simultaneous PUSCH transmission across two UE panels, even SRS ports are mapped to the first UE panel, and odd SRS ports are mapped to the second UE panel.

[0038] For example, in the case of a total of four Tx ports across two UE panels, it is assumed that each UE panel has two coherent Tx ports. In addition, the Tx ports from different UE panels are non-coherent. In this case, the mapping of SRS ports to UE panels is that even-numbered SRS ports 0 and 2 belong to the first UE panel, and odd-numbered SRS ports 1 and 3 belong to the second UE panel.

[0039] As another example, in the case of a total of eight Tx ports across two UE panels, it is assumed that each UE panel has four coherent Tx ports. In addition, the Tx ports from different UE panels are incoherent. In this case, the mapping of SRS ports to UE panels is that even-numbered SRS ports 0, 2, 4, and 6 belong to the first UE panel, and odd-numbered SRS ports 1, 3, 5, and 7 belong to the second UE panel.

[0040] In a third implementation of single DCI codebook based simultaneous PUSCH transmission with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is codebook based. In addition, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation matches the maximum number of SRS resources defined for a wireless communication system that does not implement simultaneous PUSCH operation. Finally, it is possible that the third implementation corresponds to the case where beam indication is used to inform the UE of the UL beam to be used.

[0041] Under a third implementation, up to two spatialRelationInfo parameters may be provided in the configuration of each of the SRS resources in the SRS resource set. Each of the up to two spatialRelationInfo parameters may correspond to a (e.g., different) beamforming (and corresponding power control information) used by one of the two UE panels for simultaneous PUSCH transmissions.

[0042] Then, the first beamforming (and corresponding power control information) for the first UE panel is used to perform the transmission of the SRS resources (or ports of the SRS resources) corresponding to the first UE panel. In addition, the second beamforming (and corresponding power control information) for the second UE panel is used to perform the transmission of the SRS resources (or ports of the SRS resources) corresponding to the second UE panel.

[0043] Note that where the SRS ports are spread across each of the UE panels, the even-numbered ports may be associated with a first UE panel and the odd-numbered ports may be associated with a second UE panel, as discussed herein.

[0044] In a fourth embodiment of simultaneous PUSCH transmission based on a single DCI codebook using SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is based on the codebook. In addition, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation matches the maximum number of SRS resources defined for a wireless communication system that does not implement simultaneous PUSCH operation. Finally, the fourth embodiment may correspond to the case where a transmission configuration indicator (TCI) state is used to notify the UE of the manner in which UL transmission is performed. It is envisioned that such TCI states may be, for example, UL TCI states and / or joint UL / downlink (DL) TCI states.

[0045] Under a fourth implementation, up to two TCI states may be provided in the configuration of each SRS resource in the SRS resource set. Each of the up to two TCI states may correspond to a (e.g., different) UL transmission mode (e.g., beamforming and / or power control) used by one of the two UE panels for simultaneous PUSCH transmission. For example, it is contemplated that the up to two TCI states in the configuration of the SRS resources may be two UL TCI states, two joint UL / DL TCI states, or a combination of a UL TCI state and a joint UL / DL TCI state.

[0046] Then, the TCI state parameter associated with the first UE panel is used to perform the transmission of the SRS resource (or the port of the SRS resource) corresponding to the first UE panel. In addition, the TCI state parameter associated with the second UE panel is used to perform the transmission of the SRS resource (or the port of the SRS resource) corresponding to the second UE panel.

[0047] Note that where the SRS ports are spread across each of the UE panels, the even-numbered ports may be associated with a first UE panel and the odd-numbered ports may be associated with a second UE panel, as discussed herein.

[0048] In a fifth implementation of simultaneous PUSCH transmission based on a single DCI codebook with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is codebook based. In addition, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation is greater than the maximum number of SRS resources defined for a wireless communication system that does not implement simultaneous PUSCH operation.

[0049] Under the first option of the fifth embodiment, the SRS resource set may be configured with one or more pairs of SRS resources. Each pair of SRS resources has a first SRS resource used (e.g., transmitted) on a first UE panel and a second SRS resource used on a second UE panel. In addition, each pair corresponds to a unique SRS resource indicator (SRI) value.

[0050] When receiving the SRS resources of the SRS resource set, the network selects a pair of SRS resources and indicates the selection back to the UE using the corresponding SRI value in the SRI in the scheduling DCI. Then, the first PUSCH transmission is transmitted on the first UE panel according to the first SRS resources of the selected pair, and the second PUSCH transmission is transmitted on the second UE panel according to the second SRS resources of the selected pair (simultaneously).

[0051] Figure 2 An SRS resource set 200 with paired SRS resources 202, 204 according to embodiments herein is illustrated. The first SRS resource pair 202 includes SRS resource 0 206 for a first UE panel and SRS resource 2 208 for a second UE panel. The second SRS resource pair 204 includes SRS resource 1 210 for the first UE panel and SRS resource 3 212 for the second UE panel.

[0052] The first SRS resource pair 202 is associated with a first SRI value 214 (eg, "0"). The second SRS resource pair 204 is associated with a second SRI value 216 (eg, "1").

[0053] Once the SRS resource set 200 is transmitted by the UE (with SRS resources 206, 208, 210, 212 transmitted on their corresponding UE panels), the network may indicate one of the pairs 202, 204 using a corresponding one of the first SRI value 214 and the second SRI value 216 in the SRI in the DCI. In response, the UE prepares and transmits a first PUSCH transmission for the first UE panel (corresponding to one of the indicated pair of SRS resources for the first panel) and a (simultaneous) second PUSCH transmission for the second UE panel (corresponding to the other of the indicated pair of SRS resources for the second UE panel).

[0054] Under the second option of the fifth implementation, the SRS resource set may be configured with one or more subsets of SRS resources. Each subset of SRS resources contains SRS resources for the same UE panel.

[0055] The second option envisages using multiple SRIs, with one SRI corresponding to each subset of SRS resources in a configured SRS resource set. Furthermore, each SRS resource in a subset corresponds to a unique SRI value for its corresponding SRI.

[0056] When receiving the SRS resources of the SRS resource set, the network selects SRS resources from each of the subsets of SRS resources. These selections are indicated in the DCI by placing the SRI value of the selected SRS resources from the SRS subset into the SRI corresponding to the subset. Simultaneous PUSCH transmissions are then prepared and transmitted on each UE panel based on (and according to) its corresponding indicated SRS resources.

[0057] Figure 3 An SRS resource set 300 having SRS resources arranged in subsets 302, 304 according to embodiments herein is illustrated. A first subset of SRS resources 302 includes SRS resource 0 306 and SRS resource 1 308, each for a first UE panel. A second subset of SRS resources 304 includes SRS resource 2 310 and SRS resource 3 312, each for a second UE panel.

[0058] The first subset of SRS resources 302 is associated with a first SRI ("SRI_1"). SRS resource 0 306 is associated with a first value 314 (eg, "0") of the first SRI. SRS resource 1 308 is associated with a second value 316 (eg, "1") of the first SRI.

[0059] The second subset of SRS resources 304 is associated with a first SRI ("SRI_2"). SRS resource 2 310 is associated with a first value 320 (eg, "0") of a second SRI. SRS resource 3 312 is associated with a second value 318 (eg, "1") of a second SRI.

[0060] Once the SRS resource set 300 is transmitted by the UE (wherein the SRS resources 306, 308, 310 and 312 are transmitted on their corresponding UE panels), the network may indicate the SRI value of one SRS resource in each of the subsets 302, 304 by placing the appropriate value of the desired SRS resource from a given subset 302, 304 in a corresponding one of the two SRIs. In response, the UE prepares and transmits a first PUSCH transmission for the first UE panel (corresponding to the indicated one of the SRS resources 306, 308 of the first subset 302 of SRS resources) and a (simultaneous) second PUSCH transmission for the second UE panel (corresponding to the indicated one of the SRS resources 310, 312 of the second subset 304 of SRS resources).

[0061] The second option under the fifth embodiment may provide additional flexibility over the first option under the fifth embodiment as described herein, at the expense of additional signaling overhead in the scheduling DCI (corresponding to the use of multiple SRIs in the second option).

[0062] In a sixth implementation of single DCI codebook based simultaneous PUSCH transmission with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is codebook based. In addition, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation is greater than the maximum number of SRS resources as defined for a wireless communication system that does not implement simultaneous PUSCH operation.

[0063] In a first option under the sixth implementation, it is possible that, upon receiving the SRS resource set, the network is configured to provide a single TPMI field in the DCI to the UE. In such a case, when generating a simultaneous PUSCH transmission utilizing SDM using two UE panels, the (single) indicated precoding matrix is ​​applied to all SRS ports used by the SRS resources of the SRS resource set and mapped to both UE panels.

[0064] Figure 4 A diagram 400 is illustrated showing various precoding matrices that may be indicated in a DCI. Note that although four are illustrated, it is possible that only one of them is indicated in the DCI. In addition, note that Figure 4 The example precoding matrices in are given as examples and not by way of limitation (other precoding matrices are also possible).

[0065] It is possible that, in such a case where a single precoding matrix is ​​indicated, some SRS ports are mapped to the even rows of the indicated precoding matrix and other SRS ports are mapped to the odd rows of the indicated precoding matrix. For example, in a first case of a first option of a first implementation scheme, it is possible that the even SRS ports used by the SRS resources are mapped to the even rows of the indicated precoding matrix and the odd SRS ports used by the SRS resources are mapped to the odd rows of the indicated precoding matrix. In this first case, and assuming that four SRS ports and a rank four precoder matrix are used by the SRS resources (as in Figure 4), it is possible that the first SRS port of the SRS resource may be mapped to the first row 402 of the applicable precoding matrix. In addition, the second SRS port used by the SRS resource may be mapped to the second row 404 of the applicable precoding matrix. In addition, the third SRS port used by the SRS resource may be mapped to the third row 406 of the applicable precoding matrix. Finally, the fourth SRS port used by the SRS resource may be mapped to the fourth row 408 of the applicable precoding matrix. It is possible that the first SRS port and the third SRS port are even SRS ports (e.g., SRS ports 0 and 2), and the second SRS port and the fourth SRS port are odd SRS ports (e.g., SRS ports 1 and 3).

[0066] In other cases, different mappings of SRS ports to precoding matrix rows may be used. For example, in the second case of the first option of the first embodiment, it is possible that two SRS resources (each SRS resource having two SRS ports) may be configured for codebook-based PUSCH operation, and each SRS resource is configured for its corresponding panel. It is possible that the first SRS port of the first SRS resource may be mapped to the first row 402 of the applicable precoding matrix. In addition, the first SRS port used by the second SRS resource may be mapped to the second row 404 of the applicable precoding matrix. In addition, the second SRS port used by the first SRS resource may be mapped to the third row 406 of the applicable precoding matrix. Finally, the second SRS port used by the second SRS resource may be mapped to the fourth row 408 of the applicable precoding matrix.

[0067] In a second option under the sixth implementation, it is possible that, after receiving the SRS resource set, the network is configured to provide two TPMI fields in the DCI to the UE. In such a case, when generating a simultaneous PUSCH transmission using SDM using two UE panels, a first precoding matrix of the two indicated precoding matrices is applied to the SRS ports used by the SRS resources of the SRS resource set mapped to the first UE panel, and a second precoding matrix of the two indicated precoding matrices is applied to the SRS ports used by the SRS resources of the SRS resource set mapped to the second UE panel.

[0068] In a seventh implementation of simultaneous PUSCH transmission based on a single DCI codebook with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is codebook based. In addition, it is possible that the maximum number of SRS resources in the SRS resource set used by the UE for simultaneous PUSCH operation is greater than the maximum number of SRS resources defined for a wireless communication system that does not implement simultaneous PUSCH operation. Under the seventh implementation, there may be a single antenna port field provided by the network in the DCI.

[0069] Under the first option of the seventh implementation, the (single) antenna port field may contain any number of demodulation reference signal (DMRS) code division multiplexing (CDM) groups without data (eg, 1 group, 2 groups, 3 groups, etc. may be supported).

[0070] Under the second option of the seventh embodiment, the (single) antenna port field includes two DMRS CDM groups without data. In such a case, the DMRS ports in the first DMRS CDM group without data are mapped to the first UE panel, and the DMRS ports in the second DMRS CDM group without data are mapped to the second UE panel.

[0071] In some cases under this second option, the antenna port combination {0, 2, 3} may be indicated, where antenna port {0} is mapped to the first UE panel and antenna ports {2, 3} are mapped to the second UE panel.

[0072] In some 3GPP networks, to facilitate such use, the antenna port combination {0,2,3} may be added to, for example, the following table for the (1,2) layer combination in 3GPP Technical Specification (TS) 38.212, v.17.3.0 (September 2022):

[0073] ● Table 7.3.1.1.2-10: Disable transform precoder, dmrs-Type=1, maxLength=1, rank=3

[0074] ● Table 7.3.1.1.2-14: Disable transform precoder, dmrs-Type=1, maxLength=2, rank=3

[0075] ● Table 7.3.1.1.2-18: Disable transform precoder, dmrs-Type=2, maxLength=1, rank=3

[0076] ● Table 7.3.1.1.2-22: Disable transform precoder, dmrs-Type=2, maxLength=2, rank=3

[0077] Finally, it is noted that in case the first to seventh embodiments for single DCI codebook based simultaneous PUSCH transmission with SDM as already described herein are interoperable, these embodiments may be combined into a composite embodiment.

[0078] Figure 5 A method 500 of a UE according to an embodiment of the present invention is shown. The method 500 includes sending 502 to a network one or more SRS resources of an SRS resource set configured at the UE, the SRS resource set being an exclusive SRS resource set for codebook-based simultaneous PUSCH operation, wherein the one or more SRS resources are sent using multiple panels of the UE.

[0079] The method 500 also includes, in response to transmitting the one or more SRS resources, receiving 504 a DCI from the network that schedules a first PUSCH transmission on a first panel of the plurality of panels and a second PUSCH transmission on a second panel of the plurality of panels concurrent with the first PUSCH transmission.

[0080] The method 500 also includes transmitting 506 the first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel to the network using the SDM.

[0081] In some embodiments of method 500 , the UE is not configured for full power transmission mode 2 and the number of one or more SRS resources is greater than two.

[0082] In some embodiments of method 500 , the UE is configured for full power transmission mode 2 and the number of the one or more SRS resources is greater than four.

[0083] In some embodiments of method 500, the codebook used for codebook-based simultaneous PUSCH operation is a partially coherent codebook, the even SRS ports used by one or more SRS resources of the SRS resource set are mapped to the first panel, and the odd SRS ports used by one or more SRS resources of the SRS resource set are mapped to the second panel.

[0084] In some embodiments of method 500, a configuration of a first SRS resource in the one or more SRS resources indicates a first beam used on a first panel and a second beam used on a second panel, and sending the one or more SRS resources includes sending the first SRS resource on the first beam on the first panel and on the second beam on the second panel. In some of these embodiments, even-numbered SRS ports used by the first SRS resource are mapped to the first panel, and odd-numbered SRS ports used by the first SRS resource are mapped to the second panel.

[0085] In some embodiments of method 500, a configuration of a first SRS resource in the one or more SRS resources indicates a first TCI state for the first panel and a second TCI state for the second panel, and transmitting the one or more SRS resources includes transmitting the first SRS resource on the first panel based on the first TCI state and on the second panel based on the second TCI state. In some of these embodiments, even-numbered SRS ports used by the first SRS resource are mapped to the first panel, and odd-numbered SRS ports used by the first SRS resource are mapped to the second panel.

[0086] In some embodiments of method 500, one or more SRS resources of an SRS resource set are arranged into one or more pairs, wherein a first pair of the one or more pairs includes a first SRS resource for a first panel among the one or more SRS resources and a second SRS resource for a second panel among the one or more SRS resources, and as part of sending the one or more SRS resources, the first SRS resource is sent on the first panel and the second SRS resource is sent on the second panel; and the DCI uses an SRI indicating the first pair of SRS resources to schedule a first PUSCH transmission on the first panel and a second PUSCH transmission on the second panel.

[0087] In some embodiments of method 500, one or more SRS resources of an SRS resource set are arranged in one or more subsets, a first subset corresponds to a first panel and includes a first SRS resource of the one or more SRS resources, and a second subset corresponds to a second panel and includes a second SRS resource of the one or more SRS resources, as part of sending the one or more SRS resources, the first SRS resource is sent on the first panel and the second SRS resource is sent on the second panel, and the DCI uses a first SRI indicating the first SRS resource from the first subset and a second SRI indicating the second SRS resource from the second subset to schedule a first PUSCH transmission on the first panel and a second PUSCH transmission on the second panel.

[0088] In some embodiments of method 500, the DCI includes a TPMI indicating a precoding matrix corresponding to each of the first panel and the second panel, and method 500 also includes generating a first PUSCH transmission by applying a first SRS port used by one or more SRS resources to the even rows of the precoding matrix and generating a second PUSCH transmission by applying a second SRS port used by one or more SRS resources to the odd rows of the precoding matrix.

[0089] In some embodiments of method 500, sending one or more SRS resources includes sending a first SRS resource among the one or more SRS resources on a first panel and sending a second SRS resource among the one or more SRS resources on a second panel, and the DCI includes a first TPMI indicating a first precoding matrix corresponding to the first panel and a second TPMI indicating a second precoding matrix corresponding to the second panel, and method 500 also includes generating a first PUSCH transmission by applying a first SRS port used by the first SRS resource to the first precoding matrix and generating a second PUSCH transmission by applying a second SRS port used by the second SRS resource to the second precoding matrix.

[0090] In some embodiments of method 500, the DCI includes an antenna port configuration indicating a first DMRS CDM group having a first one or more DMRS ports mapped to a first panel and a second DMRS CDM group having a second one or more DMRS ports mapped to a second panel, the first PUSCH transmission uses the first one or more DMRS ports, and the second PUSCH transmission uses the second one or more DMRS ports. In some of these embodiments, the first one or more DMRS ports consist of antenna port {0}, and the second one or more DMRS ports consist of antenna ports {2,3}.

[0091] Figure 6 A method 600 of a RAN according to embodiments herein is illustrated. The method 600 includes configuring 602 an SRS resource set to a UE, the SRS resource set being an exclusive SRS resource set for codebook-based simultaneous PUSCH operation.

[0092] The method 600 also includes receiving 604 one or more SRS resources of the SRS resource set from the UE, wherein the one or more SRS resources are sent by the UE using a plurality of panels of the UE.

[0093] The method 600 also includes transmitting 606 a DCI to the UE in response to receiving the one or more SRS resources, the DCI scheduling a first PUSCH transmission on a first panel of the UE's multiple panels and a second PUSCH transmission on a second panel of the UE's multiple panels concurrent with the first PUSCH transmission.

[0094] The method 600 also includes receiving 608 the first PUSCH transmission and the second PUSCH transmission from the UE.

[0095] In some embodiments of method 600 , the UE is not configured for full power transmission mode 2 and the number of one or more SRS resources is greater than two.

[0096] In some embodiments of method 600, the UE is configured for full power transmission mode 2, and the number of one or more SRS resources is greater than four.

[0097] In some embodiments, method 600 also includes providing a configuration of a first SRS resource of the one or more SRS resources to the UE, the configuration indicating a first beam to be used on the first panel and a second beam to be used on the second panel.

[0098] In some embodiments, method 600 also includes providing a configuration of a first SRS resource of the one or more SRS resources to the UE, the configuration indicating a first TCI state for the first panel and a second TCI state for the second panel.

[0099] In some embodiments of method 600, one or more SRS resources of an SRS resource set are arranged into one or more pairs, wherein a first pair of the one or more pairs includes a first SRS resource for a first panel among the one or more SRS resources and a second SRS resource for a second panel among the one or more SRS resources, and the DCI uses an SRS resource indicator (SRI) indicating the first pair of SRS resources to schedule a first PUSCH transmission on the first panel and a second PUSCH transmission on the second panel.

[0100] In some embodiments of method 600, one or more SRS resources of an SRS resource set are arranged in one or more subsets, a first subset corresponds to a first panel and includes a first SRS resource from the one or more SRS resources, and a second subset corresponds to a second panel and includes a second SRS resource from the one or more SRS resources, and the DCI uses a first SRS resource indicator (SRI) indicating a first SRS resource from the first subset and a second SRI indicating a second SRS resource from the second subset to schedule a first PUSCH transmission on the first panel and a second PUSCH transmission on the second panel.

[0101] In some implementations of method 600, the DCI includes a TPMI indicating a precoding matrix corresponding to each of the first panel and the second panel.

[0102] In some embodiments of method 600, the DCI includes a first TPMI indicating a first precoding matrix corresponding to the first panel and a second TPMI indicating a second precoding matrix corresponding to the second panel.

[0103] In some embodiments of method 600, the DCI includes an antenna port configuration indicating a first DMRS CDM group having a first one or more DMRS ports corresponding to a first panel and a second DMRS CDM group having a second one or more DMRS ports corresponding to a second panel. In some of these embodiments, the first one or more DMRS ports consist of antenna port {0}, and the second one or more DMRS ports consist of antenna ports {2, 3}.

[0104] Exclusive SRS resource set implementation for non-codebook based simultaneous PUSCH operation

[0105] In the first implementation of single DCI non-codebook based simultaneous PUSCH transmission with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is non-codebook based (eg, using = "non-codebook").

[0106] Under a first option of the first implementation, it is possible that each SRS resource of the SRS resource set may be sent from one of the UE panels (but not the other panel).

[0107] Under the second option of the first embodiment, it is possible that each SRS resource of the SRS resource set may be sent from two UE panels.

[0108] In the second implementation of single DCI non-codebook based simultaneous PUSCH transmission using SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is non-codebook based. In addition, it is possible that the second implementation corresponds to the case where beam indication is used to inform the UE of the UL beam to be used.

[0109] Under the second implementation, in the case where each SRS resource of the SRS resource set can be transmitted from only one panel in the UE panel, one spatialRelationInfo parameter (corresponding to beamforming and having related power control information) can be configured in each SRS resource.

[0110] Under the second implementation, in the case where each SRS resource of the SRS resource set can be sent from two UE panels, up to two spatialRelationInfo parameters can be configured in each SRS resource. In such a case, the first spatialRelationInfo parameter applies to the first UE panel and the second spatialRelationInfo parameter applies to the second UE panel.

[0111] Under the second implementation, up to two total spatialRelationInfo parameters may be used within an SRS resource of an SRS resource set.

[0112] In a third implementation of single DCI non-codebook based simultaneous PUSCH transmission using SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is non-codebook based. In addition, under the third implementation, it is possible that each SRS resource of the SRS resource set can be transmitted from one panel (but not another panel) in the UE panel.

[0113] In a third embodiment, it is possible that one of the UE panels is used for even-numbered SRS resources (e.g., as indexed as SRS resources 0, 2, 4, etc. within an SRS resource set) and another of the UE panels is used for odd-numbered SRS resources (e.g., as indexed as SRS resources 1, 3, 5, etc. within an SRS resource set).

[0114] In a fourth embodiment of single DCI non-codebook based simultaneous PUSCH transmission using SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is non-codebook based. In addition, it is possible that the fourth embodiment corresponds to the case where TCI states are used to inform the UE of the manner in which UL transmission is performed. It is envisioned that such TCI states may be, for example, UL TCI states and / or joint UL / DL TCI states.

[0115] In a fourth embodiment, two TCI states may be configured for SRS resources. Each of the up to two TCI states may correspond to a (e.g., different) UL transmission mode (e.g., beamforming and / or power control) used by one of the two UE panels for simultaneous PUSCH transmission. For example, it is contemplated that the two TCI states in the configuration of the SRS resources may be two UL TCI states, two joint UL / DL TCI states, or a combination of a UL TCI state and a joint UL / DL TCI state.

[0116] In the case where each SRS resource of the SRS resource set can be sent from only one of the UE panels, for each SRS resource, one of the two ("paired") TCI states is applied (so that the SRS resource is sent based on the TCI state and the UE panel corresponding to the TCI state). Note that in such a case, it is possible that one of the UE panels (and its corresponding TCI state) is used for even-numbered SRS resources (e.g., as indexed as SRS resources 0, 2, 4, etc. within the SRS resource set), and the other of the UE panels (and its corresponding TCI state) is used for odd-numbered SRS resources (e.g., as indexed as SRS resources 1, 3, 5, etc. within the SRS resource set), as described herein.

[0117] In a case where each SRS resource of an SRS resource set can be sent from two UE panels, two TCI states can be respectively applied to each SRS resource (such that the SRS resource is sent based on two TCI states from one UE panel from the UE panel, wherein a portion of the SRS resource is sent on the first UE panel according to one of the TCI states, and a portion of the SRS resource is sent on the second UE panel according to the second TCI state).

[0118] In the fifth implementation of single DCI non-codebook based simultaneous PUSCH transmission with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is non-codebook based.

[0119] Under the first option of the fifth embodiment, it is possible that there is a single SRI field in the DCI provided by the network. The SRI field is used to indicate one or more SRS resources of the SRS resource set. This may correspond to the case where a single SRS resource may be sent across two UE panels (so that a single SRI indicates the SRS resources of the two UE panels spatially).

[0120] Thus, once a set of SRS resources is sent by a UE (where the SRS resources are transmitted across two UE panels), the network may indicate the SRI value of the one or more SRS resources by placing the corresponding value of the desired one or more SRS resources in the SRI field of the DCI. In response, the UE prepares and transmits a first PUSCH transmission for the first UE panel and a (simultaneous) second PUSCH transmission for the second UE panel based on the selected SRS resources.

[0121] Under the second option of the fifth embodiment, it is possible that there are two SRI fields in the DCI provided by the network. The SRI field indicates the first SRS resource and the second SRS resource of the SRS resource set. This may correspond to the case where each SRS resource of the SRS resource set can be sent from one UE panel (rather than another UE panel) in the UE panel. Therefore, the first SRI field is used to select / indicate one or more SRS resources of the SRS resource set mapped to the first UE panel, and the second SRI field selects / indicates one or more SRS resources of the SRS resource set mapped to the second UE panel. This may correspond to the case where the SRS resources of the SRS resource set can be sent from one UE panel (rather than another UE panel) in the UE panel.

[0122] Thus, once a set of SRS resources is sent by a UE (where the SRS resources are transmitted on their corresponding UE panels), the network may indicate two SRI values ​​for the two SRS resources by placing the corresponding values ​​of the desired SRS resources in the appropriate fields in the SRI field. One of the SRI fields contains an SRI value corresponding to a first one or more SRS resources used on a first UE panel, and another of the SRI fields contains an SRI value corresponding to a second one or more SRS resources used on a second UE panel. In response, the UE prepares and transmits a first PUSCH transmission for the first UE panel based on the first one or more SRS resources and prepares and transmits a (simultaneous) second PUSCH transmission for the second UE panel based on the second one or more SRS resources.

[0123] Under the third option of the fifth embodiment, it is possible that there is a single SRI field in the DCI provided by the network. The SRI field is used to indicate one or more SRS resources of the SRS resource set. Some of the indicated SRS resources are sent from the first panel, and other indicated SRS resources are sent from the second panel. This may correspond to the case where each SRS resource of the SRS resource set may be sent from one of the UE panels (but not another UE panel).

[0124] Thus, once a set of SRS resources is sent by a UE (where the SRS resources are transmitted on their corresponding UE panels), the network may indicate the SRI value of one or more resources by placing the corresponding value of the desired SRS resource in the SRI field. In response, and in case the SRI value indicates at least two SRS resources, the UE prepares and transmits a first PUSCH transmission for a first UE panel based on one of the indicated SRS resources and / or prepares and transmits a (simultaneous) second PUSCH transmission for a second UE panel based on another of the indicated SRS resources.

[0125] In a sixth implementation of single DCI non-codebook based simultaneous PUSCH transmission with SDM, it is possible that the exclusive SRS resource set configured at the UE for simultaneous PUSCH transmission is non-codebook based. Under the sixth implementation, there may be a single antenna port field provided by the network in the DCI.

[0126] Under the first option of the sixth implementation, the (single) antenna port field may contain any number of demodulation reference signal (DMRS) code division multiplexing (CDM) groups without data (eg, 1 group, 2 groups, 3 groups, etc. may be supported).

[0127] Under the second option of the seventh embodiment, the (single) antenna port field includes two DMRS CDM groups without data. In such a case, the DMRS ports in the first DMRS CDM group without data are mapped to the first UE panel, and the DMRS ports in the second DMRS CDM group without data are mapped to the second UE panel.

[0128] In some cases under this second option, the antenna port combination {0, 2, 3} may be indicated, where antenna port {0} is mapped to the first UE panel and antenna ports {2, 3} are mapped to the second UE panel.

[0129] In some 3GPP networks, to facilitate such use, the antenna port combination {0,2,3} may be added to, for example, the following table for the (1,2) layer combination in 3GPP Technical Specification (TS) 38.212, v.17.3.0 (September 2022):

[0130] ● Table 7.3.1.1.2-10: Disable transform precoder, dmrs-Type=1, maxLength=1, rank=3

[0131] ● Table 7.3.1.1.2-14: Disable transform precoder, dmrs-Type=1, maxLength=2, rank=3

[0132] ● Table 7.3.1.1.2-18: Disable transform precoder, dmrs-Type=2, maxLength=1, rank=3

[0133] ● Table 7.3.1.1.2-22: Disable transform precoder, dmrs-Type=2, maxLength=2, rank=3

[0134] Finally, it is noted that in case the first to sixth embodiments for single DCI non-codebook based simultaneous PUSCH transmission with SDM as already described herein are interoperable, these embodiments may be combined into a composite embodiment.

[0135] Figure 7 A method 700 of a UE according to an embodiment of the present invention is illustrated. The method 700 includes sending 702 to a network one or more SRS resources of an SRS resource set, the SRS resource set being an exclusive SRS resource set configured at the UE for non-codebook based simultaneous PUSCH operation, wherein the one or more SRS resources are sent using multiple panels of the UE.

[0136] The method 700 also includes receiving 704 a DCI from a network in response to transmitting the one or more SRS resources, the DCI scheduling a first PUSCH transmission on a first panel of the plurality of panels and a second PUSCH transmission on a second panel of the plurality of panels concurrent with the first PUSCH transmission.

[0137] The method 700 also includes transmitting 706 the first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel to the network using the SDM.

[0138] In some embodiments of method 700, a first SRS resource of the SRS resource set is transmitted on a first panel, and a second SRS resource of the SRS resource set is transmitted on a second panel.

[0139] In some implementations of method 700, each of a first SRS resource of the SRS resource set and a second SRS resource of the SRS resource set is sent on each of the first panel and the second panel.

[0140] In some embodiments of method 700, a configuration of a first SRS resource among one or more SRS resources indicates a first beam used on a first panel and a second beam used on a second panel, and sending the one or more SRS resources includes sending the first SRS resource on the first beam on the first panel and on the second beam on the second panel.

[0141] In some embodiments of method 700, the configuration of a first SRS resource in the one or more SRS resources indicates a first TCI state of the first panel and a second TCI state of the second panel. In some embodiments of these embodiments, method 700 also includes identifying that the first SRS resource has an even index within the SRS resource set, and sending one or more SRS resources includes sending the first SRS resource on the first panel based on the first TCI state. In some of these cases, method 700 also includes identifying that the first SRS resource has an odd index within the SRS resource set, and sending one or more SRS resources includes sending the first SRS resource on the second panel based on the second TCI state. In some embodiments of these embodiments, sending one or more SRS resources includes sending the first SRS resource on the first panel based on the first TCI state and on the second panel based on the second TCI state.

[0142] In some embodiments of method 700, first one or more SRS resources among the one or more SRS resources having an even index within an SRS resource set are sent on a first panel, and second one or more SRS resources among the one or more SRS resources having an odd index within the SRS resource set are sent on a second panel.

[0143] In some embodiments of method 700, the DCI schedules a first PUSCH transmission on a first panel and a second PUSCH transmission on a second panel using a first SRI indicating a first SRS resource among one or more SRS resources that is transmitted on the first panel and the second panel as part of transmitting the one or more SRS resources.

[0144] In some embodiments of method 700, the DCI uses a first SRI and a second SRI to schedule a first PUSCH transmission on a first panel and a second PUSCH transmission on a second panel, the first SRI indicating a first SRS resource among one or more SRS resources that is sent on the first panel as part of sending the one or more SRS resources, and the second SRI indicating a second SRS resource among one or more SRS resources that is sent on the second panel as part of sending the one or more SRS resources.

[0145] In some embodiments of method 700, the DCI includes an antenna port configuration indicating a first DMRS CDM group having a first DMRS port mapped to a first panel and a second DMRS CDM group having a second DMRS port mapped to a second panel, the first PUSCH transmission uses the first DMRS port, and the second PUSCH transmission uses the second DMRS port. In some of these embodiments, the first one or more DMRS ports consist of antenna port {0}, and the second one or more DMRS ports consist of antenna ports {2,3}.

[0146] Figure 8 A method 800 of a RAN according to embodiments herein is illustrated. The method 800 includes configuring 802 an SRS resource set to a UE, the SRS resource set being an exclusive SRS resource set for codebook-based simultaneous PUSCH operation.

[0147] The method 800 also includes receiving 804 one or more SRS resources of the SRS resource set from the UE, wherein the one or more SRS resources are sent using a plurality of panels of the UE.

[0148] The method 800 also includes transmitting 806 a DCI to the UE in response to receiving one or more SRS resources, the DCI scheduling a first PUSCH transmission on a first panel of the plurality of panels of the UE and a second PUSCH transmission on a second panel of the plurality of panels of the UE concurrent with the first PUSCH transmission.

[0149] The method 800 also includes receiving 808 the first PUSCH transmission and the second PUSCH transmission from the UE.

[0150] In some embodiments, method 800 also includes providing a configuration of a first SRS resource of the one or more SRS resources to the UE, the configuration indicating a first beam to be used on the first panel and a second beam to be used on the second panel.

[0151] In some embodiments, method 800 also includes providing a configuration of a first SRS resource of the one or more SRS resources to the UE, the configuration indicating a first TCI state for the first panel and a second TCI state for the second panel.

[0152] In some embodiments of method 800, the DCI schedules a first PUSCH transmission on a first panel and a second PUSCH transmission on a second panel using a first SRI indicating a first SRS resource of one or more SRS resources transmitted on the first panel and the second panel.

[0153] In some embodiments of method 800, the DCI uses a first SRI and a second SRI to schedule a first PUSCH transmission on a first panel and a second PUSCH transmission on a second panel, wherein the first SRI indicates a first SRS resource sent on the first panel among one or more SRS resources, and the second SRI indicates a second SRS resource sent on the second panel among one or more SRS resources.

[0154] In some embodiments of method 800, the DCI includes an antenna port configuration indicating a first DMRS CDM group having a first DMRS port corresponding to a first panel and a second DMRS CDM group having a second DMRS port corresponding to a second panel. In some of these embodiments, the first one or more DMRS ports consist of antenna port {0}, and the second one or more DMRS ports consist of antenna ports {2, 3}.

[0155] Fig. 9 An example architecture of a wireless communication system 900 according to an embodiment disclosed herein is illustrated. The description provided below is for an example wireless communication system 900 operating in conjunction with the LTE system standard and / or the 5G or NR system standard provided in the 3GPP technical specifications.

[0156] like Fig. 9 As shown, wireless communication system 900 includes UE 902 and UE 904 (although any number of UEs may be used). In this example, UE 902 and UE 904 are illustrated as smartphones (e.g., handheld touch screen mobile computing devices capable of connecting to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication.

[0157] UE 902 and UE 904 may be configured to be communicatively coupled to RAN 906. In an embodiment, RAN 906 may be NG-RAN, E-UTRAN, etc. UE 902 and UE 904 utilize connections (or channels) (shown as connection 908 and connection 910, respectively) with RAN 906, where each connection (or channel) includes a physical communication interface. RAN 906 may include one or more base stations, such as base station 912 and base station 914, to implement connection 908 and connection 910.

[0158] In this example, connection 908 and connection 910 are air interfaces that enable such communicative coupling and may conform to the RAT used by the RAN 906 , such as, for example, LTE and / or NR.

[0159] In some embodiments, UE 902 and UE 904 may also communicate data directly via side link interface 916. UE 904 is shown as being configured to access an access point (shown as AP 918) via connection 920. As an example, connection 920 may include a local wireless connection, such as any connection that complies with the IEEE 802.11 protocol, wherein AP 918 may include In this example, AP 918 may be connected to another network (eg, the Internet) without going through CN 924.

[0160] In an embodiment, UE 902 and UE 904 may be configured to communicate with each other or with base station 912 and / or base station 914 over a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication techniques, such as, but not limited to, orthogonal frequency division multiple access (OFDMA) communication techniques (e.g., for downlink communication) or single carrier frequency division multiple access (SC-FDMA) communication techniques (e.g., for uplink and ProSe or sidelink communication), although the scope of the embodiments is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0161] In some embodiments, all or part of the base station 912 or the base station 914 may be implemented as one or more software entities running on a server computer as part of a virtual network. In addition, or in other embodiments, the base station 912 or the base station 914 may be configured to communicate with each other via the interface 922. In an embodiment where the wireless communication system 900 is an LTE system (e.g., when the CN 924 is an EPC), the interface 922 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to the EPC and / or between two eNBs connected to the EPC. In an embodiment where the wireless communication system 900 is an NR system (e.g., when the CN 924 is a 5GC), the interface 922 may be an Xn interface. The Xn interface is defined between two or more base stations (e.g., two or more gNBs, etc.) connected to the 5GC, between the base station 912 (e.g., gNB) and the eNB connected to the 5GC, and / or between two eNBs connected to the 5GC (e.g., CN 924).

[0162] The RAN 906 is shown communicatively coupled to the CN 924. The CN 924 may include one or more network elements 926 configured to provide various data and telecommunication services to customers / subscribers (e.g., UE 902 and users of UE 904) connected to the CN 924 via the RAN 906. The components of the CN 924 may be implemented in one physical device or separate physical devices including components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0163] In an embodiment, CN 924 may be an EPC, and RAN 906 may be connected to CN 924 via an S1 interface 928. In an embodiment, S1 interface 928 may be divided into two parts: an S1 user plane (S1-U) interface, which carries service data between base station 912 or base station 914 and a serving gateway (S-GW); and an S1-MME interface, which is a signaling interface between base station 912 or base station 914 and a mobility management entity (MME).

[0164] In an embodiment, CN 924 may be a 5GC, and RAN 906 may be connected to CN 924 via an NG interface 928. In an embodiment, NG interface 928 may be divided into two parts: an NG user plane (NG-U) interface, which carries service data between base station 912 or base station 914 and a user plane function (UPF); and an S1 control plane (NG-C) interface, which is a signaling interface between base station 912 or base station 914 and an access and mobility management function (AMF).

[0165] Generally, the application server 930 may be an element that provides applications that use Internet Protocol (IP) bearer resources with the CN 924 (e.g., packet-switched data services). The application server 930 may also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for the UE 902 and UE 904 via the CN 924. The application server 930 may communicate with the CN 924 via an IP communication interface 932.

[0166] Fig.10 A system 1000 for performing signaling 1034 between a wireless device 1002 and a network device 1018 according to an embodiment disclosed herein is illustrated. The system 1000 may be part of a wireless communication system as described herein. The wireless device 1002 may be, for example, a UE of a wireless communication system. The network device 1018 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.

[0167] The wireless device 1002 may include one or more processors 1004. The processor 1004 may execute instructions to perform various operations of the wireless device 1002, as described herein. The processor 1004 may include one or more baseband processors implemented using, for example, a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0168] The wireless device 1002 may include a memory 1006. The memory 1006 may be a non-transitory computer-readable storage medium that stores instructions 1008 (which may include, for example, instructions executed by the processor 1004). The instructions 1008 may also be referred to as program code or a computer program. The memory 1006 may also store data used by the processor 1004 and results computed by the processor.

[0169] The wireless device 1002 may include one or more transceivers 1010, which may include radio frequency (RF) transmitter and / or receiver circuitry that uses an antenna 1012 of the wireless device 1002 to facilitate signaling (e.g., signaling 1034) sent or received by the wireless device 1002 with other devices (e.g., network device 1018) according to a corresponding RAT.

[0170] The wireless device 1002 may include one or more antennas 1012 (e.g., one, two, four, or more). For implementations with multiple antennas 1012, the wireless device 1002 may take advantage of the spatial diversity of these multiple antennas 1012 to transmit and / or receive multiple different data streams on the same time-frequency resources. This behavior may be referred to as, for example, MIMO behavior (referring to the multiple antennas used at each of the transmitting device and the receiving device to implement this aspect). MIMO transmission by the wireless device 1002 may be implemented based on precoding (or digital beamforming) applied at the wireless device 1002, which multiplexes the data streams between the antennas 1012 based on known or assumed channel characteristics, so that each data stream is received at an appropriate signal strength relative to the other streams and at a desired location in the spatial domain (e.g., the location of the receiver associated with the data stream). Certain implementations may use a single-user MIMO (SU-MIMO) approach (where the data streams are all directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) approach (where the individual data streams may be directed to individual (different) receivers in different locations in the spatial domain).

[0171] In certain embodiments with multiple antennas, the wireless device 1002 may implement analog beamforming techniques whereby the phases of signals transmitted by antennas 1012 are relatively adjusted such that the (joint) transmissions of antennas 1012 are directional (this is sometimes referred to as beam steering).

[0172] The wireless device 1002 may include one or more interfaces 1014. The interfaces 1014 may be used to provide input to or output from the wireless device 1002. For example, a wireless device 1002 that is a UE may include an interface 1014, such as a microphone, a speaker, a touch screen, buttons, etc., to allow a user of the UE to provide input and / or output to the UE. Other interfaces of such a UE may be composed of transmitters, receivers, and other circuits that allow the UE to communicate with other devices (e.g., in addition to the transceiver 1010 / antenna 1012 described above), and may communicate according to known protocols (e.g., etc.) to perform the operation.

[0173] The wireless device 1002 may include a PUSCH operation module 1016. The PUSCH operation module 1016 may be implemented via hardware, software, or a combination thereof. For example, the PUSCH operation module 1016 may be implemented as a processor, circuit, and / or instructions 1008 stored in the memory 1006 and executed by the processor 1004. In some examples, the PUSCH operation module 1016 may be integrated within the processor 1004 and / or the transceiver 1010. For example, the PUSCH operation module 1016 may be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 1004 or the transceiver 1010.

[0174] The PUSCH operation module 1016 may be used in various aspects of the present disclosure, for example, Figures 1 to 8 For example, the PUSCH operation module 1016 may be configured to perform UE-based functions of simultaneous PUSCH transmission based on a single DCI codebook with SDM and / or simultaneous PUSCH transmission based on a single DCI non-codebook with SDM, as described herein.

[0175] The network device 1018 may include one or more processors 1020. The processor 1020 may execute instructions to perform various operations of the network device 1018 as described herein. The processor 1020 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0176] The network device 1018 may include a memory 1022. The memory 1022 may be a non-transitory computer-readable storage medium that stores instructions 1024 (which may include, for example, instructions executed by the processor 1020). The instructions 1024 may also be referred to as program code or a computer program. The memory 1022 may also store data used by the processor 1020 and results calculated by the processor.

[0177] The network device 1018 may include one or more transceivers 1026, which may include RF transmitter and / or receiver circuits that use an antenna 1028 of the network device 1018 to facilitate signaling (e.g., signaling 1034) sent or received by the network device 1018 with other devices (e.g., wireless device 1002) according to the corresponding RAT.

[0178] The network device 1018 may include one or more antennas 1028 (e.g., one, two, four, or more). In embodiments with multiple antennas 1028, the network device 1018 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc. as described above.

[0179] The network device 1018 may include one or more interfaces 1030. The interface 1030 may be used to provide input to or output from the network device 1018. For example, the network device 1018 as a base station may include an interface 1030 composed of a transmitter, a receiver and other circuits (e.g., in addition to the transceiver 1026 / antenna 1028 already described), which enables the base station to communicate with other equipment in the core network and / or enables the base station to communicate with external networks, computers, databases, etc., for the purpose of operating, managing and maintaining the base station or other equipment operably connected to the base station.

[0180] The network device 1018 may include a PUSCH operation module 1032. The PUSCH operation module 1032 may be implemented via hardware, software, or a combination thereof. For example, the PUSCH operation module 1032 may be implemented as a processor, circuit, and / or instructions 1024 stored in the memory 1022 and executed by the processor 1020. In some examples, the PUSCH operation module 1032 may be integrated within the processor 1020 and / or the transceiver 1026. For example, the PUSCH operation module 1032 may be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 1020 or the transceiver 1026.

[0181] The PUSCH operation module 1032 may be used in various aspects of the present disclosure, for example, Figures 1 to 8For example, the PUSCH operation module 1032 may be configured to perform network-based functions of simultaneous PUSCH transmission based on a single DCI codebook with SDM and / or simultaneous PUSCH transmission based on a single DCI non-codebook with SDM, as described herein.

[0182] Embodiments contemplated herein include an apparatus including means for performing one or more elements of any of methods 500 and 700. The apparatus may be, for example, an apparatus that is a UE (such as wireless device 1002 as a UE, as described herein).

[0183] Embodiments contemplated herein include one or more non-transitory computer-readable media including instructions for causing the electronic device to perform one or more elements of any of methods 500 and 700 when one or more processors of the electronic device execute the instructions. The non-transitory computer-readable medium may be, for example, a memory of a UE (such as memory 1006 of wireless device 1002 as a UE, as described herein).

[0184] Embodiments contemplated herein include an apparatus comprising logical components, modules, or circuits for performing one or more elements of any of methods 500 and 700. The apparatus may be, for example, an apparatus of a UE (such as wireless device 1002 as a UE, as described herein).

[0185] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of any of the methods 500 and 700. The apparatus may be, for example, an apparatus of a UE (such as wireless device 1002 as a UE, as described herein).

[0186] Embodiments contemplated herein include a signal as described in or associated with one or more elements of either method 500 or method 700 .

[0187] Embodiments contemplated herein include a computer program or computer program product including instructions, wherein execution of the program by a processor causes the processor to perform one or more elements of any of the methods 500 and 700. The processor may be a processor of a UE (such as the processor 1004 of the wireless device 1002 as a UE, as described herein). These instructions may be located, for example, in a processor of a UE and / or on a memory (such as the memory 1006 of the wireless device 1002 as a UE, as described herein).

[0188] Embodiments contemplated herein include an apparatus including means for performing one or more elements of any of methods 600 and 800. For example, the apparatus may be an apparatus of a base station of a RAN (such as network device 1018 as a base station, as described herein).

[0189] Embodiments contemplated herein include one or more non-transitory computer-readable media including instructions for causing the electronic device to perform one or more elements of any of methods 600 and 800 when one or more processors of the electronic device execute the instructions. For example, the non-transitory computer-readable medium may be a memory of a base station of a RAN (such as memory 1022 of network device 1018 as a base station, as described herein).

[0190] Embodiments contemplated herein include an apparatus including logical components, modules, or circuits for performing one or more elements of any of methods 600 and 800. For example, the apparatus may be an apparatus of a base station of a RAN (such as network device 1018 as a base station, as described herein).

[0191] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of any of the methods 600 and 800. For example, the apparatus may be an apparatus of a base station of a RAN (such as network device 1018 as a base station, as described herein).

[0192] Embodiments contemplated herein include a signal as described in or associated with one or more elements of either method 600 or method 800 .

[0193] Embodiments contemplated herein include a computer program or computer program product including instructions, wherein execution of the program by a processing element causes the processing element to perform one or more elements of any of methods 600 and 800. The processor may be a processor of a base station of the RAN (such as processor 1020 of network device 1018 as a base station, as described herein). For example, these instructions may be located in a processor and / or on a memory of a base station of the RAN (such as memory 1022 of network device 1018 as a base station, as described herein).

[0194] For one or more embodiments, at least one of the components set forth in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, a baseband processor as described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein. For another example, a circuit system associated with a UE, a base station, a network element, etc. as described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein.

[0195] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. In view of the above teachings, modifications and variations are possible or can be obtained from the practice of various embodiments.

[0196] Embodiments and implementations of the systems and methods described herein may include various operations that may be embodied in machine executable instructions to be executed by a computer system. A computer system may include one or more general or special purpose computers (or other electronic devices). A computer system may include hardware components that include specific logic components for performing operations; or may include a combination of hardware, software, and / or firmware.

[0197] It should be appreciated that the systems described herein include descriptions of specific embodiments. These embodiments may be combined into a single system, partially combined into other systems, separated into multiple systems, or otherwise divided or combined. In addition, it is contemplated that parameters, attributes, aspects, etc. of another embodiment may be used in one embodiment. For clarity, these parameters, attributes, aspects, etc. are described only in one or more embodiments, and it should be appreciated that these parameters, attributes, aspects, etc. may be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless expressly stated herein.

[0198] It is well known that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0199] Although the foregoing has been described in considerable detail for the sake of clarity, it will be apparent that certain changes and modifications may be made without departing from the principles of the invention. It should be noted that there are many alternative ways to implement both the processes and the apparatus described herein. Therefore, the embodiments of the present invention should be regarded as illustrative rather than restrictive, and the specification is not limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.

Claims

1. A method of a user equipment (UE), the method comprising: transmitting to a network one or more sounding reference signal (SRS) resources of a sounding reference signal (SRS) resource set configured at the UE, the SRS resource set being an exclusive SRS resource set for codebook-based simultaneous physical uplink shared channel (PUSCH) operation, wherein the one or more SRS resources are transmitted using a plurality of panels of the UE; In response to transmitting the one or more SRS resources, receiving downlink control information (DCI) from the network, the DCI scheduling a first PUSCH transmission on a first panel of the plurality of panels and a second PUSCH transmission on a second panel of the plurality of panels concurrent with the first PUSCH transmission; and The first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel are transmitted to the network using spatial division multiplexing (SDM).

2. The method of claim 1, wherein the UE is not configured for full power transmission mode 2, and wherein the number of the one or more SRS resources is greater than two. 3 . The method of claim 1 , wherein the UE is configured for full power transmission mode 2, and wherein the number of the one or more SRS resources is greater than 4. 4 .

4. The method according to claim 1, wherein: The codebook used for the codebook-based simultaneous PUSCH operation is a partially coherent codebook; even-numbered SRS ports used by the one or more SRS resources of the SRS resource set are mapped to the first panel; and Odd-numbered SRS ports used by the one or more SRS resources of the SRS resource set are mapped to the second panel.

5. The method according to claim 1, wherein: The configuration of a first SRS resource of the one or more SRS resources indicates a first beam used on the first panel and a second beam used on the second panel; and Transmitting the one or more SRS resources includes transmitting the first SRS resource on the first panel on the first beam and on the second panel on the second beam. 6 . The method of claim 5 , wherein even-numbered SRS ports used by the first SRS resource are mapped to the first panel, and odd-numbered SRS ports used by the first SRS resource are mapped to the second panel.

7. The method according to claim 1, wherein: The configuration of a first SRS resource of the one or more SRS resources indicates a first transmission configuration indicator (TCI) state of the first panel and a second TCI state of the second panel; and Transmitting the one or more SRS resources includes transmitting the first SRS resource on the first panel based on the first TCI state and on the second panel based on the second TCI state. 8 . The method of claim 7 , wherein even-numbered SRS ports used by the first SRS resource are mapped to the first panel, and odd-numbered SRS ports used by the first SRS resource are mapped to the second panel.

9. The method according to claim 1, wherein: The one or more SRS resources of the SRS resource set are arranged into one or more pairs, wherein a first pair of the one or more pairs includes a first SRS resource for the first panel among the one or more SRS resources and a second SRS resource for the second panel among the one or more SRS resources; As part of transmitting the one or more SRS resources, the first SRS resource is transmitted on the first panel and the second SRS resource is transmitted on the second panel; and The DCI schedules the first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel using an SRS resource indicator (SRI) indicating the first pair of SRS resources.

10. The method of claim 1, wherein: The one or more SRS resources of the SRS resource set are arranged in one or more subsets, a first subset corresponds to the first panel and includes a first SRS resource of the one or more SRS resources, and a second subset corresponds to the second panel and includes a second SRS resource of the one or more SRS resources; As part of transmitting the one or more SRS resources, the first SRS resource is transmitted on the first panel and the second SRS resource is transmitted on the second panel; and The DCI schedules the first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel using a first SRS resource indicator (SRI) indicating the first SRS resource from the first subset and a second SRI indicating the second SRS resource from the second subset.

11. The method according to claim 1, wherein: The DCI includes a transmit precoding matrix index (TPMI) indicating a precoding matrix corresponding to each of the first panel and the second panel, and The method further comprises: generating the first PUSCH transmission by applying a first SRS port used by the one or more SRS resources to even rows of the precoding matrix; and The second PUSCH transmission is generated by applying a second SRS port used by the one or more SRS resources to odd rows of the precoding matrix.

12. The method of claim 1, wherein: Sending the one or more SRS resources includes sending a first SRS resource of the one or more SRS resources on the first panel and sending a second SRS resource of the one or more SRS resources on the second panel; The DCI includes a first transmit precoding matrix index (TPMI) indicating a first precoding matrix corresponding to the first panel and a second TPMI indicating a second precoding matrix corresponding to the second panel, and The method further comprises: generating the first PUSCH transmission by applying a first SRS port used by the first SRS resource to the first precoding matrix; and The second PUSCH transmission is generated by applying a second SRS port used by the second SRS resource to the second precoding matrix.

13. The method of claim 1, wherein: The DCI includes an antenna port configuration indicating a first demodulation reference signal (DMRS) code division multiplexing (CDM) group having first one or more DMRS ports mapped to the first panel and a second DMRS CDM group having second one or more DMRS ports mapped to the second panel; The first PUSCH transmission uses the first one or more DMRS ports; and The second PUSCH transmission uses the second one or more DMRS ports.

14. The method of claim 13, wherein the first one or more DMRS ports consist of antenna port {0}, and the second one or more DMRS ports consist of antenna ports {2, 3}.

15. A method of a Radio Access Network (RAN), the method comprising: configuring a sounding reference signal (SRS) resource set to a user equipment (UE), the SRS resource set being an exclusive SRS resource set for codebook-based simultaneous physical uplink shared channel (PUSCH) operation; receiving one or more SRS resources of the SRS resource set from the UE, wherein the one or more SRS resources are sent by the UE using a plurality of panels of the UE; In response to receiving the one or more SRS resources, transmitting downlink control information (DCI) to the UE, the DCI scheduling a first PUSCH transmission on a first panel of the plurality of panels of the UE and a second PUSCH transmission on a second panel of the plurality of panels of the UE concurrent with the first PUSCH transmission; and The first PUSCH transmission and the second PUSCH transmission are received from the UE.

16. The method of claim 15, wherein the UE is not configured for full power transmission mode 2, and wherein the number of the one or more SRS resources is greater than two. 17 . The method of claim 15 , wherein the UE is configured for full power transmission mode 2, and wherein the number of the one or more SRS resources is greater than 4.

18. The method of claim 15, further comprising providing a configuration of a first SRS resource among the one or more SRS resources to the UE, the configuration indicating a first beam used on the first panel and a second beam used on the second panel.

19. The method of claim 15, further comprising providing a configuration of a first SRS resource of the one or more SRS resources to the UE, the configuration indicating a first transmit configuration indicator (TCI) state of the first panel and a second TCI state of the second panel.

20. The method of claim 15, wherein: The one or more SRS resources of the SRS resource set are arranged into one or more pairs, wherein a first pair of the one or more pairs includes a first SRS resource for the first panel among the one or more SRS resources and a second SRS resource for the second panel among the one or more SRS resources; and The DCI schedules the first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel using an SRS resource indicator (SRI) indicating the first pair of SRS resources.

21. The method of claim 15, wherein: The one or more SRS resources of the SRS resource set are arranged in one or more subsets, a first subset corresponds to the first panel and includes a first SRS resource of the one or more SRS resources, and a second subset corresponds to the second panel and includes a second SRS resource of the one or more SRS resources; and The DCI schedules the first PUSCH transmission on the first panel and the second PUSCH transmission on the second panel using a first SRS resource indicator (SRI) indicating the first SRS resource from the first subset and a second SRI indicating the second SRS resource from the second subset.

22. The method of claim 15, wherein the DCI includes a transmit precoding matrix index (TPMI) indicating a precoding matrix corresponding to each of the first panel and the second panel.

23. The method of claim 15, wherein the DCI includes a first transmit precoding matrix index (TPMI) indicating a first precoding matrix corresponding to the first panel and a second TPMI indicating a second precoding matrix corresponding to the second panel.

24. The method of claim 15, wherein the DCI includes an antenna port configuration indicating a first demodulation reference signal (DMRS) code division multiplexing (CDM) group having a first one or more DMRS ports corresponding to the first panel and a second DMRS CDM group having a second one or more DMRS ports corresponding to the second panel.

25. The method of claim 24, wherein the first one or more DMRS ports consist of antenna port {0} and the second one or more DMRS ports consist of antenna ports {2, 3}.

26. An apparatus comprising means for performing the method according to any one of claims 1 to 25.

27. A computer-readable medium comprising instructions, which, when executed by one or more processors of an electronic device, cause the electronic device to perform the method according to any one of claims 1 to 25.

28. An apparatus comprising logic components, modules or circuits for performing the method according to any one of claims 1 to 25.

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