Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device receives first information sent by a network device, wherein the first information is used for determining a first path loss offset corresponding to a first SRS resource set when an RRC parameter followUnifiedTCI-StateSRS is not configured, and the first information comprises one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset. Even if the RRC parameter followUnifiedTCI-StateSRS is not configured for the first SRS resource set, on the basis of the present application, a first path loss offset for the first SRS resource set can be determined, so that SRS resources in the first SRS resource set can use the same first path loss offset, thereby simplifying the configuration of a path loss offset.

Description

Wireless communication method, terminal device and network device TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, and more particularly, to a wireless communication method, a terminal device and a network device. BACKGROUND

[0002] Some communication systems define an asymmetric transmitting and receiving point (TRP) (or called asymmetric network node) scenario. For example, in an enhanced asymmetric TRP scenario, there is an uplink (UL) TRP. The UL TRP can only provide the function of uplink reception, without the function of downlink (DL) transmission. Based on the UL TRP, the enhanced asymmetric TRP scenario can include the case of downlink single TRP (sTRP) and uplink multiple TRP (mTRP), i.e., the asymmetric DL sTRP / UL mTRP scenario.

[0003] Some communication processes in the asymmetric TRP scenario need to be defined or improved.

[0004] SUMMARY

[0005] The present application provides a wireless communication method, a terminal device and a network device. The aspects related to the present application are introduced as follows.

[0006] In a first aspect, a wireless communication method is provided. The method includes: a terminal device receiving first information sent by a network device; wherein the first information is used to determine a first path loss offset corresponding to a first sounding reference signal (SRS) resource set in a case where a radio resource control (RRC) parameter followUnifiedTCI-StateSRS is not configured, and the first information includes one or more of the following: a path loss offset corresponding to a transmission configuration indicator (TCI) state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset.

[0007] In a second aspect, a method for wireless communication is provided. The method includes transmitting, by a network device, first information to a terminal device. The first information is used to determine a first path loss offset corresponding to a first SRS resource set without configuring an RRC parameter followUnifiedTCI-StateSRS. The first information includes one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset.

[0008] In a third aspect, a terminal device is provided. The terminal device includes a receiving unit. The receiving unit is configured to receive first information transmitted by a network device. The first information is used to determine a first path loss offset corresponding to a first SRS resource set without configuring an RRC parameter followUnifiedTCI-StateSRS. The first information includes one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset.

[0009] In a fourth aspect, a network device is provided. The network device includes a transmitting unit. The transmitting unit is configured to transmit first information to a terminal device. The first information is used to determine a first path loss offset corresponding to a first SRS resource set without configuring an RRC parameter followUnifiedTCI-StateSRS. The first information includes one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset.

[0010] In a fifth aspect, a terminal device is provided. The terminal device includes a transceiver, a memory, and a processor. The memory is configured to store a program. The processor is configured to invoke the program in the memory and control the transceiver to receive or transmit signals, so that the terminal device performs part or all of the steps in the method of the first aspect.

[0011] In a sixth aspect, a network device is provided. The network device includes a transceiver, a memory, and a processor. The memory is configured to store a program. The processor is configured to invoke the program in the memory and control the transceiver to receive or transmit signals, so that the network device performs part or all of the steps in the method of the second aspect.

[0012] In a seventh aspect, an example provides a communication system, which includes the terminal device and / or the network device described above. In another possible design, the system can further include other devices interacting with the terminal device or the network device in the solutions provided by embodiments of the present application.

[0013] In an eighth aspect, a computer-readable storage medium is provided, which stores a computer program. The computer program causes the terminal device and / or the network device to perform some or all of the steps of the methods in the various aspects described above.

[0014] In a ninth aspect, a computer program product is provided, which includes a non-transitory computer-readable storage medium storing a computer program. The computer program is executable by the terminal device and / or the network device to perform some or all of the steps of the methods in the various aspects described above. In some implementations, the computer program product can be a software installation package.

[0015] In a tenth aspect, a chip is provided, which includes a memory and a processor. The processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods in the various aspects described above.

[0016] Even if the first SRS resource set is not configured with the RRC parameter followUnifiedTCI-StateSRS, based on the present application, a first path loss offset for the first SRS resource set can still be determined, so that the SRS resources in the first SRS resource set use the same first path loss offset, thereby simplifying the configuration of the path loss offset. This is because for an SRS resource set, a set of uplink control parameters is sufficient for use, and therefore it is feasible and reasonable for the SRS resources in the first SRS resource set to use a first path loss offset. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applied.

[0018] FIG. 2 is an example diagram of a downlink single-TRP and uplink multi-TRP case.

[0019] FIG. 3 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

[0020] FIG. 4 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.

[0021] FIG. 5 is a schematic structural diagram of a network device provided by an embodiment of the present application.

[0022] FIG. 6 is a schematic structural diagram of an apparatus for communication provided by an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the present application will be described below with reference to the drawings.

[0024] Communication system

[0025] FIG. 1 is a wireless communication system 100 to which embodiments of the present application are applied. The wireless communication system 100 can include communication devices. The communication devices can include a network device 110 and a terminal device 120. The network device 110 can be a device that communicates with the terminal device 120.

[0026] FIG. 1 exemplarily shows one network device and two terminals. Optionally, the wireless communication system 100 can include multiple network devices and each network device can include other numbers of terminal devices within its coverage, which is not limited by embodiments of the present application.

[0027] Optionally, the wireless communication system 100 can further include a network controller, a mobile management entity, and other network entities, which are not limited by embodiments of the present application.

[0028] It should be understood that the technical solutions of embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) system or new radio (NR), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), and the like. The technical solutions provided by the present application can also be applied to future communication systems, such as a 6th generation mobile communication system, a satellite communication system, and the like.

[0029] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The terminal device in the embodiments of the present application can refer to a device providing voice and / or data connectivity for a user, and can be used to connect people, things and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer (Pad), a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in vehicle-to-everything (V2X) or device to device (D2D), etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and the smart home device communicate with each other without relaying the communication signals through the base station.

[0030] The network device in the embodiments of the present application can be a device for communicating with a terminal device. The network device can also include an access network device. The access network device can provide communication coverage for a specific geographic area and can communicate with terminal devices 120 located within the coverage area. The access network device can also be referred to as a radio access network device or a base station, etc. The access network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The access network device can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, centralized unit-control plane (CU-CP), centralized unit-user plane (CU-UP), etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip used in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, machine-to-machine (M2M) communication, a network side device in a 6G network, a device that performs the function of a base station in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device.

[0031] The base station can be fixed or mobile. For example, a helicopter or unmanned aerial vehicle can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or unmanned aerial vehicle can be configured to act as a device that communicates with another base station.

[0032] The communication devices involved in the wireless communication system can include not only access network devices and terminal devices, but also core network elements. The core network element can be implemented by a device, that is, the core network element is a core network device. It can be understood that the core network device can also be a kind of network device.

[0033] The core network element in the embodiment of the present application can include a network element that processes and forwards signaling and data of a user. For example, the core network device can include a core network access and mobility management function (core access and mobility management function, AMF), a session management function (session management function, SMF), a location management function (location management function, LMF), a network slice selection function (network slice selection function, NSSF), an authentication server function (authentication server function, AUSF), a unified data management (unified data management, UDM), a policy control function (policy control function, PCF), a user plane function (user plane function, UPF), a sensing function (sensing function, SF), a network data analytics function (network data analytics function, NWDAF) network element, an artificial intelligence (artificial intelligence, AI) function management entity, etc. Of course, other network elements can also be included in the core network, which are not listed here.

[0034] In some deployments, the network device in the embodiment of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0035] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on the aircraft, balloon and satellite in the air. The network device and the terminal device in the embodiment of the present application are not limited to the scene.

[0036] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform, such as a cloud platform.

[0037] Asymmetric TRP scenarios

[0038] Some communication systems define asymmetric TRP scenarios. For example, in the work item of R19 multiple input multiple output (MIMO), the RAN has approved the content of enhancing asymmetric TRP scenarios. In the enhanced asymmetric TRP scenario, there is an UL TRP. The UL TRP can only provide the function of receiving uplink, without the function of transmitting downlink. Based on the UL TRP, the enhanced asymmetric TRP scenario can include the case of downlink sTRP and uplink mTRP, that is, the asymmetric DL sTRP / UL mTRP scenario.

[0039] Optionally, for the enhancement of the asymmetric DL sTRP / UL mTRP scenario, for frequency range (FR) 1 and FR2, assuming an intra-band intra-DU non-co-located mTRP scenario, without changing the related technology cell definition or defining a new cell (for example, only UL cell), assuming the Rel-17 / 18 joint transmission configuration indication (TCI) framework and fully reusing the legacy QCL / UL spatial relationship rules (Specify enhancement for asymmetric DL sTRP / UL mTRP deployment scenarios, assuming intra-band intra-DU non-co-located mTRP scenarios, without changing existing cell definition or defining a new cell (e.g. UL-only cell), assuming the Rel-17 / 18 unified TCI framework and fully reusing the legacy QCL / UL spatial relation rules, targeting FR1 and FR2).

[0040] Exemplarily, two closed-loop power control (PC) adjustment states for SRS, both separate from PUSCH; path loss offset configurations for pathloss calculation to UL TRP(s), when the pathloss RS is from DL sTRP.

[0041] FIG. 2 shows an example of downlink single-TRP and uplink multi-TRP.

[0042] In the scenario shown in FIG. 2, there can be one UL TRP and one UL / DL TRP. Among them, the UL / DL TRP can provide the function of uplink reception, and can also provide the function of downlink transmission. As can be seen from FIG. 2, the scenario shown in FIG. 2 only includes one downlink TRP, i.e., a downlink sTRP. The scenario shown in FIG. 2 includes multiple uplink TRPs, i.e., uplink mTRPs. The UL TRP and the UL / DL TRP can communicate through a backhaul link.

[0043] Path loss measurement in asymmetric TRP scenario

[0044] For path loss measurement in the asymmetric TRP scenario, the terminal device can use the downlink reference signal of the DL TRP (for example, the DL sTRP) as the PL RS. When the terminal device needs to transmit to the UL TRP, it needs to compensate on the basis of the PL measured by the PL RS of the DL TRP, that is, add or subtract a path loss offset (PLO) to calculate the PL. It can be understood that, considering that the PL RS is a downlink reference signal, therefore, the terminal device needs to estimate the downlink PL by measuring the PL RS, so as to make corresponding compensation in the uplink transmission power through the path loss offset.

[0045] As shown in FIG. 2, the terminal device uses the downlink reference signal of the DL sTRP as the PL RS, and the terminal device performs uplink transmission (UL Tx with PL offset) based on the path loss offset.

[0046] Some communication standardization meetings propose to associate PLO and TCI state (e.g., UL TCI state / joint TCI state). When a terminal device can calculate the power of PUSCH / physical uplink control channel (PUCCH) / sounding reference signal (SRS) based on the measurement of the downlink path loss reference signal and the path loss offset, it can be based on the measurement of the downlink path loss reference signal and the path loss offset.

[0047] In some embodiments, for the asymmetric DL sTRP / UL mTRP deployment scenarios, support to associate a UL TCI state with a PLO (For the asymmetric DL sTRP / UL mTRP deployment scenarios, support to associate a UL TCI state with a PL offset).

[0048] Optionally, when a PUSCH / PUCCH / SRS transmission applies a UL TCI state associated with a PLO, the terminal device needs to calculate the transmission power of the PUSCH / PUCCH / SRS based on the DL PL RS and the PLO associated with this UL TCI state (When a UL TCI state associated with a PL offset is applied for the PUSCH / PUCCH / SRS transmission, the UE shall calculate the Tx power of the PUSCH / PUCCH / SRS based on the DL PL RS and PL offset associated with this UL TCI state). Exemplarily, the legacy uplink power control formulation can be reused by replacing the legacy PL with the UL PL derived from the DL PL RS and the PLO (Reuse the legacy uplink power control formulation by replacing legacy PL with UL PL which is derived from the DL PL RS and the PL offset). Exemplarily, it can be further researched that the UE can update the UL PL in the following way: new UL PL = current UL PL + an update delta indicated by the network (FFS: The UE can update UL PL in a way that new UL PL = current UL PL + an update delta indicated by the NW).

[0049] It should be noted that the technical solution of associating the UL TCI state with the PLO can not increase the number of maintained PLs per cell (Note: it does not intend to increase the number of maintained PLs per cell).

[0050] Optionally, it can be further researched whether / how to apply the PLO in the PDCCH-scheduled PRACH (PDCCH-order PRACH) transmission (whether / how to apply a PL offset on PDCCH-order PRACH transmission too).

[0051] Optionally, how to determine the Tx beam of PRACH towards UL TRP can be further studied.

[0052] The technical solution of associating UL TCI state with PLO does not imply to support 2TA for single-DCI based system.

[0053] In some embodiments, for FR1, a joint TCI state can be associated with a PLO. When a PUSCH / PUCCH / SRS transmission applies a joint TCI state associated with a PLO, the terminal device can calculate the transmission power of the PUSCH / PUCCH / SRS according to the DL PL RS and the PLO associated with the joint TCI state (For FR1, a joint TCI state can be associated with a PL offset. When a joint TCI state associated with a PL offset is applied for the PUSCH / PUCCH / SRS transmission, the UE shall calculate the Tx power of the PUSCH / PUCCH / SRS based on the DL PL RS and PL offset associated with this joint TCI state).

[0054] Optionally, the conventional uplink power control formula can be reused, and the conventional PL is replaced by the PL derived from the DL PL RS and the PLO. Exemplarily, it can be further studied that the terminal device can update the UL PL in the following manner: new UL PL = current UL PL + network indicated update increment.

[0055] The network device can configure the PLO through radio resource control (RRC) signaling and / or media access control layer control element (MAC CE). For example, the PLO can be directly configured in the joint / UL TCI state, and then the associated PLO configuration for the UL / joint TCI state is updated through the MAC CE.

[0056] Exemplarily, for the association between PLO and TCI state, the following options or other options can be considered or selected. One PLO value can be configured in a joint TCI state / UL TCI state by RRC. A MAC CE signaling can update the PLO value(s) for joint or UL TCI state(s).

[0057] In addition, some meetings also conducted research on whether / how to apply PLO for SRS resource set when the SRS resource set is not configured with TCI state. Whether / how to apply one of the two separate SRS CLPC adjustment states on the SRS resource set when the SRS resource set is not configured with TCI state. For example, defining i0 as the default CLPC for SRS resource set in this case. For example, configure one of the separate SRS CLPC adjustment states to the SRS resource set.

[0058] For a SRS resource set, a unified TCI state (UL TCI state or joint TCI state usage) can be used. For example, if the SRS resource set is not configured or the network does not provide (not provided) the RRC parameter followUnifiedTCI-StateSRS, the SRS resource set cannot use the unified TCI state. If the RRC parameter followUnifiedTCI-StateSRS of the SRS resource set is configured to be enabled, the SRS resource set can use the unified TCI state. In the related art, when the SRS resource set is not configured with the RRC parameter followUnifiedTCI-StateSRS, the parameters (such as power control parameters and beam shaping parameters) used by the terminal device to send the SRS cannot follow the TCI state indicated by the network device.

[0059] If the SRS resource set in which the SRS resource is located cannot use the unified TCI state, such an SRS resource can be referred to as a first type of SRS resource or a second type of SRS resource in the present application. If the SRS resource set in which the SRS resource is located is configured with the unified TCI state, such an SRS resource can be referred to as a third type of SRS resource in the present application.

[0060] Exemplarily, the SRS resource set in which the first type of SRS resource is located is not configured or the network does not provide the RRC parameter followUnifiedTCI-StateSRS, and the RRC parameter is configured with an uplink or joint TCI state for the SRS resource alone.

[0061] Exemplarily, the SRS resource set in which the second type of SRS resource is located is not configured or the network does not provide the RRC parameter followUnifiedTCI-StateSRS, and the RRC parameter is not configured with an uplink or joint TCI state for the SRS resource alone.

[0062] Exemplarily, the RRC parameter followUnifiedTCI-StateSRS of the SRS resource set in which the third type of SRS resource is located is configured to be enabled. For the third type of SRS resource, when the terminal device sends the SRS, the parameters in terms of power control, etc. can use the parameters associated with the indicated uplink or joint TCI state. The parameters can include PLO. In addition, the parameters can also include one or more of P0, alpha, closed-loop index, PL RS, etc.

[0063] For the case that the SRS resource set where the SRS resource (for example, the first type of SRS resource or the second type of SRS resource) is located is not configured with the RRC parameter followUnifiedTCI-StateSRS, a technical solution is proposed in the present application.

[0064] FIG. 3 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application. The method shown in FIG. 3 can be performed by a terminal device and a network device.

[0065] The method shown in FIG. 3 can include step S310. In step S310, the terminal device receives first information sent by the network device.

[0066] In the case that the first SRS resource set is not configured with the RRC parameter followUnifiedTCI-StateSRS, the first information can be used to indicate a first path loss offset corresponding to the first SRS resource set. The SRS resources contained in the first SRS resource set can all correspond to the first path loss offset, that is, the first path loss offset can be applicable to all SRS resources in the first SRS resource set.

[0067] When sending the SRS, power control can be implemented based on the first path loss offset. For example, the transmission power of the SRS can be determined according to the first path loss offset, P0, alpha, CLI and PL RS. Illustratively, the PL for transmitting the SRS can be calculated by subtracting or adding the first path loss offset from the PL measured by the PL RS of the DL TRP.

[0068] Even if the first SRS resource set is not configured with the RRC parameter followUnifiedTCI-StateSRS, based on the present application, a first path loss offset for the first SRS resource set can still be determined, so that the SRS resources in the first SRS resource set use the same first path loss offset, thereby simplifying the configuration of the path loss offset. This is because for an SRS resource set, a set of uplink control parameters is sufficient for use, therefore, it is feasible and reasonable for the SRS resources in the first SRS resource set to use one first path loss offset.

[0069] Optionally, the first information can include one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset. Embodiments 1-3 are described below respectively.

[0070] Embodiment 1

[0071] In a case where the first SRS resource set is not configured with the RRC parameter followUnifiedTCI-StateSRS, the network device can configure a TCI state for each SRS resource in the first SRS resource set respectively. For example, the network device can configure a TCI state for each SRS resource in the first SRS resource set through an RRC parameter, and each TCI state is associated with a set of uplink power control parameters. Illustratively, the RRC parameter can be the bolded part in the following example.

[0072] Taking a first SRS resource in the first SRS resource set as an example, the network device can configure a separate TCI state for the first SRS resource, i.e., the TCI state associated with the first SRS resource described above. It can be understood that the first SRS resource can be the first type of SRS resource described above. For this case, the first information can include the TCI state associated with the first SRS resource, i.e., the first path loss offset can be determined according to the path loss offset corresponding to the TCI state associated with the first SRS resource. For example, the first path loss offset can be equal to the path loss offset corresponding to the TCI state associated with the first SRS resource.

[0073] It should be noted that the path loss offset corresponding to the TCI state associated with the first SRS resource can be indicated by the pathlossOffset parameter of the first SRS resource.

[0074] It should be noted that the prerequisite for implementing embodiment 1 can include that the terminal device expects the network device to separately configure one TCI state for the first SRS resource.

[0075] In some embodiments, the first SRS resource can be determined based on the SRS resource index (SRS-ResourceId) in the first SRS resource set. For example, the first SRS resource can be the SRS resource with the lowest SRS-ResourceId in the first SRS resource set. That is, the first path loss offset corresponding to the first SRS resource set can be determined by the path loss offset corresponding to the TCI state associated with the SRS resource with the lowest SRS-ResourceId in the first SRS resource set. This scheme is simple to implement and has less impact on related technologies. In order to facilitate understanding, the related technologies are described.

[0076] In relevant standards, if the parameter p0AlphaSetforSRS is configured, the following judgment is further performed. If the SRS resource set followUnifiedTCI-StateSRS parameter is configured, then P O_UE_SRS,b,f,c (q s ),α SRS,b,f,c (q s The values ​​of P and SRS power control adaptation state l can be indicated by the p0AlphaSetforSRS parameter associated with the TCI state or TCI uplink state. O_UE_SRS,b,f,c (q s ),α SRS,b,f,c (q s (), and SRS power control adjustment state l are provided by p0AlphaSetforSRS associated with the indicated TCI-State or TCI-UL-State). If the SRS resource set followUnifiedTCI-StateSRS parameter is not configured, for an SRS resource in the SRS resource set, P O_UE_SRS,b,f,c (q s ),α SRS,b,f,c (q s The values ​​of P and SRS power control adaptation state l can be based on the p0AlphaSetforSRS parameter indication (the values ​​of P) associated with the TCI state or TCI uplink state of the SRS resource with the lowest SRS resource index in the SRS resource set. O_UE_SRS,b,f,c (q s ),α SRS,b,f,c (q s (and SRS power control adjustment state l are provided by p0AlphaSetforSRS associated with TCI-State or TCI-UL-State of an SRS resource with lowest SRS-ResourceId in the SRS resource set), and RS index q used to obtain SRS transmission path loss estimation. d The pathlossReferenceRS-Id-r17 parameter (a RS index q) can be used to indicate the TCI status or TCI uplink status of the SRS resource with the lowest SRS resource index in the SRS resource set. dfor obtaining a pathloss estimate for the SRS transmission is provided by pathlossReferenceRS-Id-r17 associated with or included in the TCI-State or TCI-UL-State of an SRS resource with lowest SRS-ResourceId in the SRS resource se)。Based on the present application, only in the branch where the followUnifiedTCI-StateSRS parameter is not configured, the following scheme needs to be further added: the path loss offset value provided by pathlossOffset associated with or included in the TCI-state or TCI-UL-State of an SRS resource with lowest SRS-ResourceId in the SRS resource set.

[0077] It should be noted that P O_SRS,b,f,c (q s ) is P O_UE_SRS,b,f,c (q s ) and a component p0 provided by SRS-ResourceSet corresponding to the SRS resource set. O_SRS,b,f,c (q s )(is the sum of the componentP O_UE_SRS,b,f,c (q s )and a component p0 provided by SRS-ResourceSet corresponding to the SRS resource set.)

[0078] It should be noted that the present application does not limit the type of TCI state associated with the first SRS resource. For example, the TCI state associated with the first SRS resource can be an uplink TCI state or a joint TCI state.

[0079] Embodiment 2

[0080] In embodiment 2, the first information can directly include the first path loss offset. That is, the first information can directly indicate the first path loss offset without indicating the associated TCI state, so that the first path loss does not need to be determined based on the associated TCI state.

[0081] Since the first information directly indicates the first path loss offset in embodiment 2, the solution provided by embodiment 2 can be applied to any type of SRS resource. For example, the technical solution provided by embodiment 2 can be applied to the second type of SRS resource, that is, for the case where the first SRS resource set contains the second type of SRS resource, the first information can include the first path loss offset. For another example, the technical solution provided by embodiment 2 can be applied to the first type of SRS resource, that is, for the case where the first SRS resource set contains the first type of SRS resource, the first information can include the first path loss offset.

[0082] As a possible implementation manner, the first path loss offset can be configured in a first message, and the first message can also be used to configure the first SRS resource set. That is, the first SRS resource set and the first path loss offset can be configured in the same message.

[0083] For example, the parameters for configuring the first SRS resource set can include a first parameter. The first parameter can be used to indicate the first path loss offset. Taking the first message as an RRC message for example, the parameters for configuring the first SRS resource set can be, for example, the parameter SRS-ResourceSet. The first parameter can be a newly defined parameter. The first parameter can also be referred to as pathlossOffset-r19. The first parameter can be an integer. The first parameter can be a positive number or a negative number. The present application does not limit the value range of the first parameter. For example, the value range of the first parameter can be an integer between -10 dB and 60 dB. For another example, the value range of the first parameter can be an integer between -60 dB and 60 dB.

[0084] The modified parameter SRS-ResourceSet can be as follows. The bolded parameter pathlossOffset-r19 is the first parameter newly defined in the present application.

[0085] In some embodiments, the first path loss offset can be configured through an RRC message.

[0086] In some cases, the first path loss offset can need to be updated. For example, when the terminal device moves, the value of the first path loss offset can change, and then the network device needs to indicate the terminal device to update the first path loss offset.

[0087] Optionally, the network device can determine whether to adjust the first path loss offset and / or how to adjust the first path loss offset by measuring a measurement result (e.g., a reference signal received power (RSRP) value) of the SRS resource sent by the terminal device. For example, if the measurement result is high, the value of the first path loss offset can be reduced; and / or if the measurement result is low, the value of the first path loss offset can be increased.

[0088] In some embodiments, the first path loss offset can be updated by a MAC CE. Compared with updating the first path loss offset by using an RRC message (e.g., by means of RRC reconfiguration), updating the first path loss offset by using a MAC CE is more flexible and efficient.

[0089] Optionally, in the case of updating the first information by using a MAC CE, the MAC CE can include one or more of the following: an identification (ID) of a serving cell in which the first SRS resource set is located; an identification (ID) of an uplink BWP in which the first SRS resource set is located; an identification (ID) of the first SRS resource set; and the updated first path loss offset.

[0090] Embodiment 3

[0091] The second path loss offset can be a path loss offset corresponding to a non-first SRS resource set. In the case where the first information includes the second path loss offset, the network device can indicate a second path loss offset corresponding to a non-first SRS resource set to the terminal device, and the terminal device can infer the first path loss offset according to the second path loss offset indicated by the network device.

[0092] The scheme provided in Embodiment 3 can be applied to any type of SRS resource. For example, the technical scheme provided in Embodiment 3 can be applied to a first type of SRS resource or a second type of SRS resource.

[0093] As a possible implementation manner, the second path loss offset can be a path loss offset of another TCI state. For a first type of SRS resource, the other TCI state can refer to a TCI state other than the TCI state configured for each SRS resource in the first SRS resource set. For a second type of SRS resource, the other TCI state can be any TCI state irrelevant to the first SRS resource set. That is, unlike Embodiments 1 and 2, the other TCI state is not a TCI state directly configured in the SRS resource, nor is it an uplink TCI state or a joint TCI state associated with a certain SRS resource in the first SRS resource set.

[0094] For example, the second path loss offset can be a path loss offset corresponding to one TCI state in a TCI state pool configured in the uplink BWP. The TCI state pool can be an uplink TCI state pool or a joint TCI state pool. For example, the second path loss offset is a path loss offset corresponding to a TCI state with the lowest TCI state ID in the TCI state pool configured in the uplink BWP.

[0095] As another possible implementation, the second path loss offset can be a path loss offset corresponding to the first signal / channel. For example, the first signal / channel can include one or more of the following: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH).

[0096] As another possible implementation, the second path loss offset can be a path loss offset corresponding to a second SRS resource set other than the first SRS resource set.

[0097] The second path loss offset can be default, i.e., the terminal device can determine the second path loss offset in a default manner. The default can refer to a definition in a communication protocol. Therefore, the second path loss offset can also be referred to as a default path loss offset.

[0098] The terminal device can determine that the SRS corresponding to the first SRS resource set and the first signal / channel are directed to the same UL TRP rather than different TRPs according to the following manner: the path loss offset corresponding to the first signal / channel is not 0. This is because, for an UL TRP (asymmetric TRP), the terminal device needs to use a non-0 PLO when transmitting other channels / signals, and for a normal UL / DL TRP (symmetric TRP), no PLO or a 0 PLO is used.

[0099] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the method embodiments described above.

[0100] FIG. 4 is a schematic structural diagram of a terminal device 400 according to an embodiment of the present application. The terminal device 400 can include a receiving unit 410.

[0101] The receiving unit 410 is configured to receive first information sent by the network device; wherein the first information is used to determine a first path loss offset corresponding to a first SRS resource set in a case where an RRC parameter followUnifiedTCI-StateSRS is not configured, and the first information comprises one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset.

[0102] In some embodiments, the first SRS resource is determined based on an SRS resource index in the first SRS resource set.

[0103] In some embodiments, the first SRS resource is an SRS resource with the lowest SRS resource index in the first SRS resource set.

[0104] In some embodiments, in a case where the first information comprises the first path loss offset, the first path loss offset is configured in a first message used to configure the first SRS resource set.

[0105] In some embodiments, in a case where the first information comprises the first path loss offset, the first path loss offset is updated by a MAC CE.

[0106] In some embodiments, the MAC CE comprises one or more of the following: an identity of a serving cell in which the first SRS resource set is located; an identity of an uplink BWP in which the first SRS resource set is located; an identity of the first SRS resource set; and the updated first path loss offset.

[0107] In some embodiments, the second path loss offset is a path loss offset corresponding to a TCI state with the lowest TCI state index in a TCI state pool configured in an uplink BWP.

[0108] In some embodiments, the second path loss offset comprises: a path loss offset corresponding to a second SRS resource set other than the first SRS resource set; or a path loss offset corresponding to a first signal / channel.

[0109] In some embodiments, the first signal / channel comprises one or more of the following: a PUSCH, a PUCCH, and a PRACH.

[0110] In optional embodiments, the receiving unit 410 can be a transceiver 630. The terminal device 400 can further comprise a processor 610 and a memory 620, as shown in FIG. 6.

[0111] Figure 5 is a schematic structural diagram of a network device 500 provided by an embodiment of the present application. The network device 500 can include a sending unit 510.

[0112] The sending unit 510 is configured to send first information to a terminal device; wherein the first information is used to determine a first path loss offset corresponding to a first SRS resource set in a case where an RRC parameter followUnifiedTCI-StateSRS is not configured, and the first information includes one or more of the following: a path loss offset corresponding to a TCI state associated with a first SRS resource in the first SRS resource set; the first path loss offset; and a second path loss offset.

[0113] In some embodiments, the first SRS resource is determined based on an SRS resource index in the first SRS resource set.

[0114] In some embodiments, the first SRS resource is an SRS resource with the lowest SRS resource index in the first SRS resource set.

[0115] In some embodiments, in a case where the first information includes the first path loss offset, the first path loss offset is configured in a first message used to configure the first SRS resource set.

[0116] In some embodiments, in a case where the first information includes the first path loss offset, the first path loss offset is updated through a MAC CE.

[0117] In some embodiments, the MAC CE includes one or more of the following: an identity of a serving cell in which the first SRS resource set is located; an identity of an uplink BWP in which the first SRS resource set is located; an identity of the first SRS resource set; and the updated first path loss offset.

[0118] In some embodiments, the second path loss offset is a path loss offset corresponding to a TCI state with the lowest TCI state index in a TCI state pool configured in an uplink BWP.

[0119] In some embodiments, the second path loss offset includes: a path loss offset corresponding to a second SRS resource set other than the first SRS resource set; or a path loss offset corresponding to a first signal / channel.

[0120] In optional embodiments, the sending unit 510 can be a transceiver 630. The network device 500 can further include a processor 610 and a memory 620, as shown in Figure 6.

[0121] FIG. 6 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. The dashed line in FIG. 6 indicates that the unit or module is optional. The apparatus 600 can be used to implement the method described in the above method embodiments. The apparatus 600 can be a chip, a terminal device, or a network device.

[0122] The apparatus 600 can include one or more processors 610. The processor 610 can support the apparatus 600 to implement the method described in the above method embodiments. The processor 610 can be a general processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0123] The apparatus 600 can also include one or more memories 620. The memory 620 stores a program, which can be executed by the processor 610, so that the processor 610 performs the method described in the above method embodiments. The memory 620 can be independent of the processor 610 or integrated in the processor 610.

[0124] The apparatus 600 can also include a transceiver 630. The processor 610 can communicate with other devices or chips through the transceiver 630. For example, the processor 610 can perform data transceiving with other devices or chips through the transceiver 630.

[0125] The embodiments of the present application also provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0126] The embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0127] The embodiments of the present application further provide a computer program. The computer program can be applied to the terminal or the network device provided by the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or the network device in the embodiments of the present application.

[0128] It should be understood that the terms "system" and "network" can be used interchangeably in the present application. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0129] In the embodiments of the present application, the "indication" mentioned can be direct indication, or indirect indication, or can be an indication of an associated relationship. For example, A indicates B, which can mean that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship.

[0130] In the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0131] In the embodiments of the present application, the term "corresponding" can mean that there is a direct or indirect corresponding relationship between the two, or can mean that there is an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, and the like.

[0132] In the embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other information that can be used to indicate related information in a device (for example, including terminal devices and network devices), and the present application does not limit the specific implementation manner. For example, predefinition can mean definition in a protocol.

[0133] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, can include an LTE protocol, an NR protocol, and a related protocol applied to a future communication system, and the present application does not limit this.

[0134] The term "and / or" in the embodiments of the present application is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents that the associated objects before and after are an "or" relationship.

[0135] In the embodiments of the present application, "including" can mean direct inclusion or indirect inclusion. Alternatively, "including" mentioned in the embodiments of the present application can be replaced by "indicating" or "for determining". For example, A includes B can be replaced by A indicating B, or A for determining B.

[0136] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0137] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can be another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0138] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0139] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0140] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0141] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A method of wireless communication, comprising: Comprising: The terminal device receives first information sent by the network device; Wherein, the first information is used to determine the first path loss offset corresponding to the first set of sounding reference signal (SRS) resources without configuring the radio resource control (RRC) parameter followUnifiedTCI-StateSRS, and the first information includes one or more of the following: The path loss offset corresponding to the transmission configuration indicator (TCI) state associated with the first SRS resource in the first set of SRS resources; The first path loss offset; The second path loss offset. The method of claim 1, wherein The first SRS resource is determined based on the SRS resource index in the first set of SRS resources. The method according to claim 2, characterized in that The first SRS resource is the SRS resource with the lowest SRS resource index in the first set of SRS resources. The method according to any one of claims 1-3, characterized in that In the case where the first information includes the first path loss offset, the first path loss offset is configured in a first message used to configure the first set of SRS resources. The method according to any one of claims 1-4, characterized in that In the case where the first information includes the first path loss offset, the first path loss offset is updated by a medium access control (MAC) control element (CE). The method according to claim 5, characterized in that The MAC CE includes one or more of the following: The identity of the serving cell where the first set of SRS resources is located; The identity of the uplink bandwidth part (BWP) where the first set of SRS resources is located; The identity of the first set of SRS resources; The updated first path loss offset. The method according to any one of claims 1-6, characterized in that The second path loss offset is the path loss offset corresponding to the TCI state with the lowest TCI state index in the TCI state pool configured in the uplink BWP. The method according to any one of claims 1-6, characterized in that The second path loss offset includes: The path loss offset corresponding to a second set of SRS resources other than the first set of SRS resources; or The path loss offset corresponding to a first signal / channel. The method of claim 8, wherein The first signal / channel includes one or more of the following: physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), and physical random access channel (PRACH). A method of wireless communication, comprising: Comprising: The network device sends first information to the terminal device; Wherein, the first information is used to determine the first path loss offset corresponding to the first set of sounding reference signal (SRS) resources without configuring the radio resource control (RRC) parameter followUnifiedTCI-StateSRS, and the first information includes one or more of the following: The path loss offset corresponding to the transmission configuration indicator (TCI) state associated with the first SRS resource in the first set of SRS resources; The first path loss offset; The second path loss offset. The method of claim 10, wherein The first SRS resource is determined based on the SRS resource index in the first set of SRS resources. The method of claim 11, wherein The first SRS resource is the SRS resource with the lowest SRS resource index in the first set of SRS resources. The method according to any one of claims 10-12, characterized in that In the case where the first information includes the first path loss offset, the first path loss offset is configured in a first message used to configure the first set of SRS resources. The method according to any one of claims 10-13, characterized in that In a case where the first information comprises the first path loss offset, the first path loss offset is updated by a medium access control control element (MAC CE). The method of claim 14, wherein The MAC CE comprises one or more of: an identity of a serving cell where the first SRS resource set is located; an identity of an uplink bandwidth part (BWP) where the first SRS resource set is located; an identity of the first SRS resource set; an updated first path loss offset. The method according to any one of claims 10-15, characterized in that The second path loss offset is a path loss offset corresponding to a TCI state with a lowest TCI state index in a TCI state pool configured in an uplink BWP. The method according to any one of claims 10-15, characterized in that The second path loss offset comprises: a path loss offset corresponding to a second SRS resource set other than the first SRS resource set; or a path loss offset corresponding to a first signal / channel. The method of claim 17, wherein The first signal / channel comprises one or more of: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH). A terminal device characterized by comprising: comprises: a receiving unit, configured to receive first information sent by a network device; wherein the first information is used to determine a first path loss offset corresponding to a first sounding reference signal (SRS) resource set in a case where a radio resource control (RRC) parameter followUnifiedTCI-StateSRS is not configured, and the first information comprises one or more of: a path loss offset corresponding to a transmission configuration indicator (TCI) state associated with a first SRS resource in the first SRS resource set; the first path loss offset; a second path loss offset. The terminal device according to claim 19, characterized in that The first SRS resource is determined based on an SRS resource index in the first SRS resource set. The terminal device according to claim 20, characterized in that The first SRS resource is an SRS resource with a lowest SRS resource index in the first SRS resource set. In a case where the first information comprises the first path loss offset, the first path loss offset is configured in a first message used to configure the first SRS resource set. The terminal device according to any one of claims 19-21, characterized by In a case where the first information comprises the first path loss offset, the first path loss offset is updated by a medium access control control element (MAC CE). The terminal device according to any one of claims 19-22, characterized by The MAC CE comprises one or more of: The terminal device according to claim 23, characterized in that an identity of a serving cell where the first SRS resource set is located; an identity of an uplink bandwidth part (BWP) where the first SRS resource set is located; an identity of the first SRS resource set; an updated first path loss offset. The second path loss offset is a path loss offset corresponding to a TCI state with a lowest TCI state index in a TCI state pool configured in an uplink BWP. The terminal device according to any one of claims 19-24, characterized by The second path loss offset comprises: The terminal device according to any one of claims 19-24, characterized by a path loss offset corresponding to a second SRS resource set other than the first SRS resource set; or a path loss offset corresponding to a first signal / channel. ​ The terminal device according to claim 26, characterized in that The first signal / channel includes one or more of the following: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH). A network device, characterized in that Comprising: a sending unit configured to send first information to a terminal device; The first information is used to determine a first path loss offset corresponding to a first set of sounding reference signal (SRS) resources in a case where a radio resource control (RRC) parameter followUnifiedTCI-StateSRS is not configured, and the first information includes one or more of the following: a path loss offset corresponding to a transmission configuration indicator (TCI) state associated with a first SRS resource in the first set of SRS resources; the first path loss offset; a second path loss offset. The network device of claim 28, wherein The first SRS resource is determined based on an SRS resource index in the first set of SRS resources. The network device of claim 29, wherein The first SRS resource is an SRS resource with the lowest SRS resource index in the first set of SRS resources. The network device according to any one of claims 28-30, characterized in that In a case where the first information includes the first path loss offset, the first path loss offset is configured in a first message used to configure the first set of SRS resources. The network device according to any one of claims 28-31, characterized in that In a case where the first information includes the first path loss offset, the first path loss offset is updated by a medium access control (MAC) control element (CE). The network device of claim 32, wherein The MAC CE includes one or more of the following: an identity of a serving cell where the first set of SRS resources is located; an identity of an uplink bandwidth part (BWP) where the first set of SRS resources is located; an identity of the first set of SRS resources; the first path loss offset after being updated. The network device according to any one of claims 28-33, characterized in that The second path loss offset is a path loss offset corresponding to a TCI state with the lowest TCI state index in a TCI state pool configured in an uplink BWP. The network device according to any one of claims 28-33, characterized in that The second path loss offset includes: a path loss offset corresponding to a second set of SRS resources other than the first set of SRS resources; or a path loss offset corresponding to a first signal / channel. The network device of claim 35, wherein The first signal / channel includes one or more of the following: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH). A terminal device characterized by comprising: Comprising a transceiver, a memory, and a processor, the memory is configured to store a program, and the processor is configured to invoke the program in the memory and control the transceiver to receive or send signals, so that the terminal device executes the method in any one of claims 1-9. A network device, characterized in that Comprising a transceiver, a memory, and a processor, the memory is configured to store a program, and the processor is configured to invoke the program in the memory and control the transceiver to receive or send signals, so that the network device executes the method in any one of claims 10-18. An apparatus, characterized in that Comprising a processor configured to invoke a program from a memory, so that the apparatus executes the method in any one of claims 1-18. A chip characterized by including a processor for calling a program from a memory, causing a device in which the chip is installed to perform the method as claimed in any one of claims 1-18. A computer-readable storage medium, characterized by having a program stored thereon, the program causing a computer to perform the method as claimed in any one of claims 1-18. A computer program product, characterized by including a program that causes a computer to perform the method as claimed in any one of claims 1-18. A computer program, characterized in that The computer program causes a computer to perform the method as claimed in any one of claims 1-18.

Images