Frequency hopping enhancement for fractional frequency exploration

Abstract

A method for a base station is provided, the method comprising: generating control information associated with SRS transmissions for transmission to at least one UE, wherein the control information indicates a SRS frequency band comprising a plurality of RBs for the SRS transmissions, the control information indicates a first sub-band for a first UE and a second sub-band for a second UE in a same SRS frequency band for SRS transmission occasions; receiving SRS from the at least one UE on a plurality of SRS transmission occasions in accordance with the control information, wherein a location hopping parameter is applied to the plurality of SRS transmission occasions, wherein a first starting location of the first sub-band for the first UE on a first SRS transmission occasion and a second starting location of the first sub-band for the first UE on a second SRS transmission occasion are determined based on the location hopping parameter.

Description

Technical Field

[0001] This application relates generally to wireless communication systems, and more specifically to frequency hopping enhancement for partial frequency detection. Background Technology

[0002] Wireless mobile communication technologies use various standards and protocols to transmit data between base stations and wireless mobile devices. Wireless communication system standards and protocols may include the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE); the 5th Generation (5G) 3GPP New Radio (NR) standard; the Institute of Electrical and Electronics Engineers (IEEE) 802.16 standard, commonly referred to by the industry organization as Global Microwave Access Interoperability (WiMAX); and the IEEE 802.11 standard for Wireless Local Area Networks (WLANs), commonly referred to by the industry organization as Wi-Fi. In the 3GPP Radio Access Network (RAN) of an LTE system, a base station may include RAN nodes such as an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly referred to as an Evolved Node B, Enhanced Node B, eNodeB, or eNB) and / or a Radio Network Controller (RNC) in the E-UTRAN, which communicates with wireless communication equipment called User Equipment (UE). In a fifth-generation (5G) wireless RAN, RAN nodes may include 5G nodes, New Radio (NR) nodes, or g node B (gNB), which communicate with wireless communication equipment (also known as user equipment (UE)). Summary of the Invention

[0003] According to an aspect of this disclosure, a method for a base station is provided, the method comprising: generating control information associated with probe reference signal (SRS) transmission for transmission to at least one user equipment (UE), wherein the control information indicates an SRS band including a plurality of resource blocks (RBs) for SRS transmission, and the control information further indicates a first sub-band for a first UE and a second sub-band for a second UE in the same SRS band for an SRS transmission timing; and receiving SRS from the at least one UE at a plurality of SRS transmission timings according to the control information, wherein a location hopping parameter is applied to the plurality of SRS transmission timings, wherein a first start position of the first sub-band for the first UE at the first SRS transmission timing and a second start position of the first sub-band for the first UE at the second SRS transmission timing are determined based on the location hopping parameter.

[0004] According to an aspect of this disclosure, a method for a user equipment is provided, the method comprising: receiving control information associated with probe reference signal (SRS) transmission from a base station, wherein the control information indicates an SRS band comprising a plurality of resource blocks (RBs), and the control information further indicates a sub-band for a UE in the SRS band for an SRS transmission timing; transmitting SRS to the base station at a plurality of SRS transmission timings according to the control information, wherein a location hopping parameter is applied to the plurality of SRS transmission timings, wherein a first starting position of the sub-band for the UE at a first SRS transmission timing and a second starting position of the sub-band for the first UE at a second SRS transmission timing are determined based on the location hopping parameter.

[0005] According to an aspect of this disclosure, an apparatus for a user equipment (UE) is provided, the apparatus comprising: one or more processors configured to perform the steps of the methods mentioned above for the user equipment.

[0006] According to an aspect of this disclosure, an apparatus for a base station includes: one or more processors configured to perform the steps of the methods mentioned above for a base station.

[0007] According to an aspect of this disclosure, a computer-readable medium having a computer program stored thereon is provided, which, when executed by one or more processors, causes a device to perform the steps of the methods mentioned above.

[0008] According to an aspect of this disclosure, a computer program product includes a computer program that, when executed by one or more processors, causes a device to perform the steps of the methods mentioned above. Attached Figure Description

[0009] The features and advantages of this disclosure will become apparent from the following detailed description taken in conjunction with the accompanying drawings, which illustrate the features of this disclosure by way of example.

[0010] Figure 1 It is a block diagram of a system including base stations and user equipment (UE) according to some implementation schemes.

[0011] Figure 2 A flowchart of an exemplary method for a base station according to some implementation schemes is shown.

[0012] Figure 3 A flowchart of an exemplary method for a user equipment according to some implementation schemes is shown.

[0013] Figure 4 Exemplary communication exchanges between a base station and a UE according to some embodiments of this disclosure are shown.

[0014] Figure 5 Exemplary SRS frequency locations according to some embodiments of this disclosure are shown.

[0015] Figure 6A An exemplary frequency hopping method is shown according to some implementations when the step size parameter S = 1 and I(k) can be the first transmission index within a radio frame for the first SRS transmission timing.

[0016] Figure 6B An exemplary frequency hopping method is shown according to some implementations when the step size parameter S = 3 and I(k) can be the first transmission index within a radio frame for the first SRS transmission timing.

[0017] Figure 6C and Figure 6D An exemplary frequency hopping is shown according to some embodiments when the step size parameter S = 1 and I(k) can be the second transmission index of a first SRS transmission opportunity in a transmission opportunity with the same frequency position within a radio frame.

[0018] Figure 7 An exemplary block diagram of an apparatus for a base station according to some embodiments is shown.

[0019] Figure 8 An exemplary block diagram of an apparatus for a UE according to some implementation schemes is shown.

[0020] Figure 9 Example components of a device 900 according to some implementation schemes are shown.

[0021] Figure 10 An exemplary interface of a baseband circuit according to some implementation schemes is shown.

[0022] Figure 11 The components are shown according to some implementation schemes.

[0023] Figure 12 The architecture of a wireless network according to some implementation schemes is shown. Detailed Implementation

[0024] In this disclosure, a "base station" may include RAN nodes such as an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) node B (also commonly referred to as an evolved node B, enhanced node B, eNodeB, or eNB) and / or a Radio Network Controller (RNC) and / or a 5G node, New Radio (NR) node, or g node B (gNB), which communicates with wireless communication equipment also referred to as User Equipment (UE). Although some examples may be described with reference to any of E-UTRAN node B, eNB, RNC, and / or gNB, such equipment can be replaced by any type of base station.

[0025] In wireless systems, a Sounding Reference Signal (SRS) is transmitted on the uplink, allowing the network to estimate channel quality at different frequencies. In Rel-15, the SRS can only be transmitted in the last 6 symbols of each time slot. For unlicensed NR (NR-U) and NR positioning, the SRS can be transmitted in any symbol in Rel-16. In Rel-15 and Rel-16 NR, the SRS can be repeated for up to 4 symbols in a simple repetition manner without any overlay code. Aperiodic SRS can be triggered by UL DCI (DCI formats 0_1, 0_2), DL DCI (DCI formats 1_1, 1_2), or dedicated DCI (DCI format 2_3).

[0026] To overcome the shortcomings of the SRS design in Rel-15 and Rel-16, RB-level partial frequency detection (RPFS) was agreed upon as part of Rel-17, and enhanced frequency hopping was also agreed upon for RPFS. In the frequency hopping enhancement for RPFS, the initial RB position (N) is supported in different SRS frequency hopping cycles for RPFS and at least for periodic or semi-persistent SRS. offset Frequency hopping. For a given SRS transmission timing. Where P F It is the ratio of partial frequency detection, that is, the ratio between the actual number of RBs transmitted by the UE for SRS and the total number of RBs configured for SRS. In other words, P F k is the number of SRS subbands in the SRS frequency band. F ={0,1,…P F -1}. Determine the complete SRS transmission bandwidth and the position transition parameter k. hopping The timing of SRS is the same for all SRS within the traditional frequency hopping cycle, but varies over the traditional frequency hopping cycle. P F It can indicate the number of UEs that can transmit SRS in the same SRS timing.

[0027] To achieve frequency hopping enhancement for RB-level partial frequency detection of at least one UE during several transmission opportunities, this disclosure provides a method for frequency hopping design. Using the method disclosed herein, frequency hopping can be implemented for periodic / semi-persistent / aperiodic SRS transmission opportunities and inter-slot / intra-slot SRS transmission opportunities. Thus, the at least one UE can be monitored at different frequencies across the entire SRS band, which not only provides good anti-interference performance but also effectively improves communication quality.

[0028] Figure 1 A wireless network 100 according to some embodiments is shown. The wireless network 100 includes a UE 101 and a base station 150 connected via an air interface 190.

[0029] UE 101 and any other UE in the system can be, for example, a laptop computer, smartphone, tablet computer, printer, machine-type device, such as a smart meter or dedicated device for healthcare monitoring, remote security monitoring, intelligent transportation systems, or any other wireless device with or without a user interface. Base station 150 provides UE 101 with network connectivity to a wider network (not shown) via air interface 190 within the base station service area provided by base station 150. In some embodiments, such a wider network can be a wide area network operated by a cellular network provider, or it can be the Internet. Each base station service area associated with base station 150 is supported by an antenna integrated with base station 150. The service area is divided into multiple sectors associated with certain antennas. Such sectors can be physically associated with fixed antennas, or can be assigned to physical areas with tunable antennas or antenna configurations that can be adjusted during beamforming to direct signals to a particular sector. For example, one implementation of base station 150 includes three sectors, each covering a 120-degree area, wherein the antenna array is pointed at each sector to provide 360-degree coverage around base station 150.

[0030] UE 101 includes control circuitry 105 coupled to transmit circuitry 110 and receive circuitry 115. Transmit circuitry 110 and receive circuitry 115 may each be coupled to one or more antennas. Control circuitry 105 may be adapted to perform operations associated with MTC. In some embodiments, control circuitry 105 of UE 101 may perform calculations or initiate measurements associated with air interface 190 to determine the channel quality of an available connection to base station 150. These calculations may be performed in conjunction with control circuitry 155 of base station 150. Transmit circuitry 110 and receive circuitry 115 may be adapted to transmit and receive data, respectively. Control circuitry 105 may be adapted or configured to perform various operations, such as the various UE-related operations described elsewhere in this disclosure. Transmit circuitry 110 may transmit multiple multiplexed uplink physical channels. These multiple uplink physical channels may be multiplexed according to time division multiplexing (TDM) or frequency division multiplexing (FDM). Transmit circuitry 110 may be configured to receive block data from control circuitry 105 for transmission across air interface 190. Similarly, receiving circuitry 115 can receive multiple multiplexed downlink physical channels from air interface 190 and relay these physical channels to control circuitry 105. Uplink and downlink physical channels can be multiplexed according to TDM or FDM. Transmitting circuitry 110 and receiving circuitry 115 can transmit and receive structured control data and content data (e.g., messages, images, video, etc.) within data blocks carried by the physical channels.

[0031] Figure 1A base station 150 according to various embodiments is also shown. The base station 150 circuitry may include control circuitry 155 coupled to transmitting circuitry 160 and receiving circuitry 165. Transmitting circuitry 160 and receiving circuitry 165 may each be coupled to one or more antennas, which may be used for communication via air interface 190.

[0032] Control circuitry 155 can be adapted to perform operations associated with the MTC. Transmitting circuitry 160 and receiving circuitry 165 can be adapted to transmit and receive data respectively within a narrow system bandwidth, which is narrower than the standard bandwidth used for personal communications. In some embodiments, for example, the transmission bandwidth can be set to or close to 1.4 MHz. In other embodiments, other bandwidths can be used. Control circuitry 155 can perform various operations, such as those associated with the base station described elsewhere in this disclosure.

[0033] Within a narrow system bandwidth, the transmitter circuit 160 can transmit multiple multiplexed downlink physical channels. These multiple downlink physical channels can be multiplexed according to TDM or FDM. The transmitter circuit 160 can transmit these multiple multiplexed downlink physical channels in a downlink superframe consisting of multiple downlink subframes.

[0034] Within a narrow system bandwidth, receiver circuit 165 can receive multiple multiplexed uplink physical channels. These multiple uplink physical channels can be multiplexed according to TDM or FDM. Receiver circuit 165 can receive these multiple multiplexed uplink physical channels in an uplink superframe composed of multiple uplink subframes.

[0035] As further described below, control circuits 105 and 155 may be involved in measuring the channel quality of air interface 190. Channel quality may be based, for example, on physical barriers between UE 101 and base station 150, electromagnetic interference from other sources, reflections, or indirect paths between UE 101 and base station 150, or other such signal noise sources. Based on channel quality, multiple retransmissions of data blocks can be scheduled, allowing transmitting circuit 110 to transmit multiple copies of the same data, and receiving circuit 115 to receive multiple copies of the same data.

[0036] Figure 2 A flowchart of an exemplary method for a base station according to some implementation schemes is shown. Figure 2 The method 200 shown can be derived from Figure 1 The base station 150 described herein is used to implement this.

[0037] At step 202, the base station may generate control information associated with probe reference signal (SRS) transmission for transmission to at least one user equipment (UE), wherein the control information indicates an SRS band including a plurality of resource blocks (RBs) for SRS transmission, and the control information may also indicate a first subband for a first UE and a second subband for a second UE in the same SRS band for SRS transmission timing.

[0038] Multiple resource blocks (RBs) can be configured for SRS transmissions of different UEs. The size of the SRS bandwidth, i.e., the number of RBs, can be determined by... The first subband can be a first subset of consecutive RBs among multiple RBs. The second subband can be a second subset of consecutive RBs among multiple RBs, which is different from the first subband. For example, for an 8-RB SRS band, the first 4 RBs can be determined as the first subband and can be used for SRS transmission of the first UE, while the last 4 RBs can be determined as the second subband and can be used for SRS transmission of the second UE. Start offset parameters for the first and second UEs can be determined to indicate the starting position of the first UE and the starting position of the second UE in the SRS band.

[0039] At step 204, the base station may receive SRS from at least one UE at multiple SRS transmission times based on control information.

[0040] The location transition parameter can be applied to multiple SRS transmission times, wherein the first start position of the first subband for the first UE in the first SRS transmission time and the second start position of the first subband for the first UE in the second SRS transmission time are determined based on the location transition parameter.

[0041] Furthermore, the first start position of the second subband for the second UE during the first SRS transmission timing and the second start position of the second subband for the second UE during the second SRS transmission timing can be determined based on this position transition parameter. In this way, the start position of the second UE can be changed in a similar manner to the first UE to avoid conflicts.

[0042] Figure 3 A flowchart of an exemplary method for a user equipment according to some implementation schemes is shown. Figure 3 The method 300 shown can be derived from Figure 1 Implemented using UE 101 as described in the document.

[0043] At step S302, the UE may receive control information associated with the transmission of a sounding reference signal (SRS) from the base station. This control information may indicate an SRS band comprising multiple resource blocks (RBs), and may also indicate a subband within the SRS band designated for the UE during SRS transmission.

[0044] Multiple resource blocks (RBs) can be configured for SRS transmissions of different UEs. The size of the SRS bandwidth can be determined by... Confirmed. The subband used for the UE can be a subset of consecutive RBs in the SRS band. Another subband in the SRS band can be determined for partial detection for another UE.

[0045] In step S304, the UE can transmit SRS to the base station at multiple SRS transmission times according to the control information.

[0046] The location transition parameter can be applied to multiple SRS transmission times, wherein the first start position of the subband for the UE in the first SRS transmission time and the second start position of the subband for the first UE in the second SRS transmission time are determined based on the location transition parameter.

[0047] For other UEs transmitting SRS in other subbands, the first starting position of the other subbands for the other UE during the first SRS transmission timing and the second starting position of the other subbands for the other UE during the second SRS transmission timing can be determined based on the position hopping parameter. In this way, the starting position of other UEs can be changed in a similar manner to that of the UE to avoid conflicts.

[0048] SRS transmission can be periodic, semi-persistent, or aperiodic.

[0049] Figure 4 Exemplary communication exchanges between a base station and a UE according to some embodiments of this disclosure are shown.

[0050] like Figure 4 As shown, at operation 403, base station 402 may send control information associated with probe reference signal (SRS) transmission to UE 401. This control information indicates an SRS band including multiple resource blocks (RBs) for SRS transmission. The control information may also indicate a subband within the SRS band used for SRS transmission timing for UE 401.

[0051] At operation 404, UE 401 can send SRS to base station 402 at multiple SRS transmission times based on control information. The SRS sent by UE 401 can use the subband indicated in the control information. The position hopping parameter can be applied to multiple SRS transmission times. Based on the position hopping parameter, a first starting position of the subband for the UE at the first SRS transmission time and a second starting position of the subband for the first UE at the second SRS transmission time are determined.

[0052] According to the embodiments of this disclosure, a position hopping can be introduced for the SRS transmission timing in RPFS. Thus, although the UE can perform partial detection only in a single SRS transmission timing, it can perform detection across the entire frequency range of the SRS band after several repetitions.

[0053] The location hopping parameter indicates the frequency hopping used for the first UE and the second UE during the same SRS transmission timing. The configuration of the location hopping parameter will be described in detail below.

[0054] The position transition parameters can be determined based on the step size parameter S and the index I(k) associated with the SRS transmission timing, where k is the sequence number of the SRS transmission timing. The step size parameter S indicates the step size of the position transition.

[0055] In some implementations, the position jump parameter can be determined by a linearly increasing function of the step size parameter and an index associated with the SRS transmission timing. For example, the position jump parameter k hopping It can be determined by the following equation (1):

[0056] k hopping =S*I(k), (1)

[0057] Where S represents the step size parameter, and I(k) represents the index associated with the k-th SRS transmission timing.

[0058] It will be appreciated that equation (1) is an exemplary function of the step size parameter and the index associated with the SRS transmission timing, and the scope of this disclosure is not limited thereto. Those skilled in the art can determine the position jump parameter k based on any possible variations of equation (1). hopping .

[0059] Index I(k) can be determined based on the index associated with the kth transmission timing in the SRS transmission.

[0060] For periodic or semi-persistent SRS transmissions, the index associated with the SRS transmission timing is one of the following: the time slot index for the time slot used for the SRS transmission timing; the first transmission index of the SRS transmission timing within a radio frame; or the second transmission index of the SRS transmission timing within a transmission timing at the same frequency position within a radio frame.

[0061] Figure 5 An exemplary periodic SRS transmission according to an implementation scheme is shown.

[0062] Figure 5 The four SRS transmission opportunities are shown in solid grid. The UE can... Figure 5 The four SRS transmission opportunities shown in the image, from left to right, sequentially transmit SRS to the BS.

[0063] like Figure 5 As shown, time slot 2 is allocated for the first SRS transmission opportunity in the radio frame, and time slot 6 is allocated for the second SRS transmission opportunity. The first SRS transmission opportunity is at a first frequency position, and the second SRS transmission opportunity is at a second frequency position different from the first frequency position.

[0064] In some implementations, I(k) can be a slot index for the slot used for the k-th SRS transmission timing.

[0065] exist Figure 5 In the SRS transmission shown, I(1) for the first SRS transmission opportunity can be determined as the index of its corresponding time slot, i.e., 2. Similarly, I(2), I(3), and I(4) for the second, third, and fourth SRS transmission opportunities can be determined as 6, 10, and 14, respectively.

[0066] In some specific implementations, I(k) can be the first transmission index of the k-th SRS transmission opportunity within a radio frame. The first transmission index can be determined based on the sequence number of the k-th SRS transmission opportunity. Figure 5 In the SRS transmission shown, I(1), I(2), I(3), and I(4) for the 1st, 2nd, 3rd, and 4th SRS transmission opportunities are determined to be 0, 1, 2, and 3, respectively. The sequence number of the transmission opportunity can be restarted for the SRS transmission opportunity closest to the start (i.e., the boundary) of the radio frame.

[0067] In some other specific implementations, I(k) can be the second transmission index of the k-th SRS transmission opportunity among transmission opportunities at the same frequency position within a radio frame. The second transmission index can be determined based on the sequence number of the SRS transmission opportunities at the same frequency position. For example... Figure 5 As shown, the first and third SRS transmission opportunities are located at a first frequency position, and the second and fourth SRS transmission opportunities are located at a second frequency position. Therefore, two SRS transmission opportunity sequences can be formed at the first and second frequency positions, respectively. Based on the first SRS transmission opportunity sequence at the first frequency position, I(1) and I(3) for the first and third SRS transmission opportunities can be determined as 0 and 1, respectively. Similarly, based on the second SRS transmission opportunity sequence at the second frequency position, I(2) and I(4) for the second and fourth SRS transmission opportunities can be determined as 0 and 1, respectively. The counting of the sequence numbers of the transmission opportunities in the SRS transmission opportunity sequences at different frequency positions can be restarted for the SRS transmission opportunity closest to the start (i.e., the boundary) of the radio frame.

[0068] For aperiodic SRS transmissions, the index associated with the timing of the first SRS transmission is one of the following: a third transmission index counting from the first triggered SRS; or a fourth transmission index based on the absolute position of the second SRS transmission in the radio frame.

[0069] In some implementations, the index I(k) associated with the k-th SRS transmission timing can be a third transmission index, counted from the first triggered SRS. The third transmission index can be determined based on the sequence number of the k-th SRS transmission timing in the sequence formed by the triggered SRS transmission timings. In other words, index I(k) can be determined by counting from the first transmission timing that triggered the SRS.

[0070] In some other implementations, the index I(k) associated with the k-th SRS transmission timing can be a fourth transmission index based on the absolute position of the triggering SRS transmission within the radio frame. For example, I(k) is determined based on the slot index of the k-th SRS transmission timing within the radio frame.

[0071] The step size parameter S in equation (1) is used to determine k. hopping Another key parameter is the step size parameter, which indicates the step size for position transitions.

[0072] The step size parameter S can be configured by RRC or hardcoded into a table. In some implementations, the step size parameter is common to multiple SRS transmission times. In some other implementations, the step size parameter can be different for different SRS transmission times. For example, the step size parameter can include at least a first value for a first SRS transmission time and a second value, different from the first value, for a second SRS transmission time. The first value can be determined based on an index associated with the first SRS transmission time, and the second value can be determined based on an index associated with the second SRS transmission time.

[0073] In some specific implementations, the step size parameter S can be a fixed number. For example, S can be set to 1 or a prime number greater than 2. Furthermore, as mentioned above, at least the first UE and the second UE can transmit SRS to the BS in the same SRS transmission. Therefore, the SRS frequency band used for SRS transmission can be divided into several parts, each assigned to a specific UE. In some examples, the step size parameter is less than the number of sub-bands in the SRS frequency band, i.e., P. F .

[0074] Figure 6A An exemplary frequency hopping 600a is shown according to some embodiments when the step size parameter S = 1 and I(k) can be the first transmission index within a radio frame for a first SRS transmission. For example... Figure 6AAs shown, the line segment represents the SRS band 603, which includes multiple resource blocks (RBs) for SRS transmission. The SRS band 603 can be evenly divided into four frequency-hopping subbands, namely P... F =4, therefore these 4 different subbands can be allocated for SRS transmission of 4 different UEs. Figure 6A The leftmost portion shows the first starting position of the first subband of the first UE SRS 602. With step size parameter S=1, the first UE SRS 602 can perform frequency hopping in direction 601 (i.e., from bottom to top) within the SRS band 603 in adjacent frequency hopping cycles with a step size of 1.

[0075] Figure 6B An exemplary frequency hopping 600b is shown according to some embodiments when the step size parameter S = 3 and I(k) can be the first transmission index within a radio frame for a first SRS transmission. Similar to... Figure 6A The SRS band 603 can also be evenly divided into four frequency-hopping subbands, namely P F =4. Figure 6B The leftmost portion shows the first starting position of the first subband of the first UE SRS 602. With step size parameter S=3, the first UE SRS 602 can achieve frequency hopping in direction 601 in adjacent frequency hopping cycles within SRS band 603 with a step size of 3.

[0076] Figure 6C and Figure 6D Exemplary frequency hopping 600c and 600d are shown according to some embodiments when the step size parameter S = 1 and I(k) can be the second transmission index of the first SRS transmission opportunity in the transmission opportunity having the same frequency position within the radio frame. Figure 6C and Figure 6D Four SRS cycles, 610–640, are shown. Similar to… Figure 6A and Figure 6B The SRS band 603 can also be evenly divided into four frequency-hopping subbands, namely P F =4. The first start position of the first subband of the first UE in SRS 602-1 in SRS cycle 610 is also the same as... Figure 6A and Figure 6B The same applies in the previous example. With step size parameter S=1, the first UE SRS 602, which has the same frequency position within a radio frame, can perform frequency hopping in direction 601 within SRS band 603 in adjacent frequency hopping cycles with a step size of 1. For example, the starting positions of UE 1 SRS 602-1, UE 1 SRS 602-2, UE 1 SRS 602-2, and UE 1 SRS 602-2 change with a step size of 1 in SRS subbands 603-1, 603-2, 603-3, and 603-4, respectively.

[0077] When the SRS band is evenly divided into two frequency hopping cycles, i.e., P F =2. k hopping The table can be configured in Table 1 as follows:

[0078] Table 1

[0079] Frequency hopping period 0 Frequency hopping cycle 1 <![CDATA[k hopping Mode 1 0 1 <![CDATA[k hopping Mode 2 1 0

[0080] For P F =2, Table 1 can be unique and simple. Therefore, a second mode (mode 2) is not needed, as the second mode can be essentially the same as the first mode (mode 1). The step size parameter S can be set to a fixed size of 1.

[0081] When the SRS band is evenly divided into 4 frequency hopping cycles, i.e., P F =4. k hopping The table can be configured in Table 2 as follows:

[0082] Table 2

[0083] Frequency hopping period 0 Frequency hopping cycle 1 Frequency hopping cycle 2 Frequency hopping cycle 3 <![CDATA[k hopping Mode 1 0 2 3 1 <![CDATA[k hopping Mode 2 0 2 1 3 <![CDATA[k hopping Mode 3 0 1 3 2 <![CDATA[k hopping Mode 4 0 3 1 2

[0084] In this configuration, the frequency hopping pattern can be an arrangement of (0, 1, 2, 3) when the table is configured, where indices 0, 1, 2, 3 represent the first, second, third, and fourth portions of the SRS band. For example, for an 8-RB SRS band, indices 0, 1, 2, 3 represent the first portion (RB 0 and RB 1), the second portion (RB 2 and RB 3), the third portion (RB 4 and RB 5), and the fourth portion (RB 6 and RB 7) of the SRS band.

[0085] The step size parameter S in equation (1) can be considered a function of k, i.e., S(k). Using k from Table 2... hopping Taking mode 4 as an example, the step size parameter S(k) between frequency hopping cycle 0 and frequency hopping cycle 1 can be 3, the step size parameter S(k) between frequency hopping cycle 1 and frequency hopping cycle 2 can be 2, the step size parameter S(k) between frequency hopping cycle 2 and frequency hopping cycle 3 can be 1, and the step size parameter S(k) between frequency hopping cycle 3 and frequency hopping cycle 0 can be 2.

[0086] For frequency hopping mode configuration, the following methods can be applied:

[0087] In some implementations, the location transition parameters are configured on a per-SRS-Resource basis. This configuration can be implemented using RRC. This way, the same k can be applied each time a specific SRS-Resource is triggered. hopping model.

[0088] In some implementations, the location transition parameter is configured on a per-SRS-ResourceSet basis. This configuration can be implemented using RRC. All SRS-Resources within the same SRS-ResourceSet use the same location transition parameter. This way, the same k can be applied each time a specific SRS-ResourceSet is triggered. hopping Pattern. Also, if a specific SRS-Resource is included in different SRS-ResourceSets, then different k... hopping The pattern is applied to this specific SRS-Resource.

[0089] In some implementations, the position hopping parameters are configured for each aperiodic SRS trigger state. This configuration can be implemented by RRC. All SRS-Resources in all SRS-ResourceSets associated with the same AP-SRS trigger state use the same frequency hopping pattern. Thus, a particular SRS-ResourceSet can belong to different AP-SRS trigger states, and therefore different k can be hopped by triggering different AP-SRS trigger states. hopping The pattern applies to the same SRS-ResourceSet.

[0090] The position hopping parameter can be applied to each frequency hopping timing, for inter-slot frequency hopping or intra-slot frequency hopping. For inter-slot frequency hopping, the first SRS transmission timing and the second SRS transmission timing are configured for different time slots. For intra-slot frequency hopping, the first SRS transmission timing and the second SRS transmission timing are configured for the same time slot.

[0091] When implementing intra-slot frequency hopping, the intra-slot frequency hopping parameter can be applied to the first SRS transmission timing and the second SRS transmission timing, wherein the intra-slot frequency hopping parameter indicates that different frequency ranges are allocated to the first SRS transmission timing and the second SRS transmission timing.

[0092] For example, at least one symbol in a time slot can be configured for SRS transmission. In this case, SRS transmission can be applied in a single symbol or multiple symbols. When considering intra-slot frequency hopping, the intra-slot frequency hopping parameter indicates the offset in the time or frequency domain of SRS transmission within the same time slot. For example, when a time slot is divided into four symbol groups, the first symbol group can be applied to the first UE and the second symbol group can be applied to the second UE. Alternatively, the first symbol group can be configured to transmit SRS at a first frequency, and the second symbol group can be configured to transmit SRS at a second frequency. Based on the same principle, the remaining symbol groups can be used for SRS transmission of other UEs. The intra-slot frequency hopping parameter can indicate the sub-band within the same time slot of the RPFS.

[0093] When determining the intra-slot frequency hopping parameters, the intra-slot frequency hopping parameters can be either a linearly increasing function or hard-coded into a table. Similar to inter-slot SRS transmission, when a linearly increasing function is applied, the intra-slot frequency hopping parameter k... intra hopping Through k intra hopping =S intra *I(k) intra To determine, where S intra The step size parameter indicates the step size within the time slot, such as 1 symbol, 3 symbols, etc., and I(k) intra This represents an index associated with the timing of SRS transmission. When hard-coded tables are applied to intra-slot frequency hopping parameters, the same hard-coded method can be implemented for inter-slot SRS transmission.

[0094] Figure 7 An exemplary block diagram of an apparatus for a base station according to some embodiments is shown. Figure 7 The device 700 shown can be used to achieve, for example, a combination Figure 2 Method 200 is shown.

[0095] like Figure 7 As shown, the device 700 includes a control information generation unit 710, a transmission unit 720, and a receiving unit 730.

[0096] The control information generation unit 710 can be configured to generate control information associated with a sounding reference signal (SRS) transmission for transmission to at least one user equipment (UE), wherein the control information indicates an SRS band including multiple resource blocks (RBs) for SRS transmission, and the control information further indicates a first subband for a first UE and a second subband for a second UE in the same SRS band for the timing of SRS transmission.

[0097] The transmission unit 720 can be configured to transmit control information associated with the transmission of a detection reference signal (SRS) to at least one user equipment (UE).

[0098] The receiving unit 730 can be configured to receive SRS from the at least one UE at multiple SRS transmission times according to control information, wherein a position hopping parameter is applied to the multiple SRS transmission times, wherein a first start position for a first subband of the first UE at a first SRS transmission time and a second start position for a first subband of the first UE at a second SRS transmission time are determined based on the position hopping parameter.

[0099] Figure 8 An exemplary block diagram of an apparatus for a UE according to some implementation schemes is shown. Figure 8 The device 800 shown can be used to achieve, for example, a combination Figure 3 Method 300 is shown.

[0100] like Figure 8 As shown, the device 800 includes a receiving unit 810 and a transmitting unit 820.

[0101] The receiving unit 810 can be configured to receive control information associated with probe reference signal (SRS) transmission from the base station, wherein the control information indicates an SRS band comprising multiple resource blocks (RBs), and the control information also indicates a subband for the UE in the SRS band used for SRS transmission timing.

[0102] The transmission unit 820 can be configured to transmit SRS to the base station at multiple SRS transmission times according to control information, wherein a location hopping parameter is applied to the multiple SRS transmission times, and a first start position of the subband for the UE at the first SRS transmission time and a second start position of the subband for the first UE at the second SRS transmission time are determined based on the location hopping parameter.

[0103] Figure 9 Example components of a device 900 according to some embodiments are shown. In some embodiments, device 900 may include at least application circuitry 902, baseband circuitry 904, radio frequency (RF) circuitry (shown as RF circuitry 920), front-end module (FEM) circuitry (shown as FEM circuitry 930), one or more antennas 932, and power management circuitry (PMC) (shown as PMC 934) coupled together as shown. Components of the illustrated device 900 may be included in a UE or RAN node. In some embodiments, device 900 may include fewer components (e.g., the RAN node may not utilize application circuitry 902, but instead include a processor / controller to process IP data received from the EPC). In some embodiments, device 900 may include additional components such as, for example, memory / storage devices, displays, cameras, sensors, or input / output (I / O) interfaces. In other embodiments, the components described below may be included in more than one device (e.g., the circuitry may be individually included in more than one device for a cloud-RAN (C-RAN) specific implementation).

[0104] Application circuitry 902 may include one or more application processors. For example, application circuitry 902 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, etc.). The processor may be coupled to or may include a memory / storage device and may be configured to execute instructions stored in the memory / storage device to enable various applications or operating systems to run on device 900. In some embodiments, the processor of application circuitry 902 may process IP data packets received from the EPC.

[0105] Baseband circuitry 904 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. Baseband circuitry 904 may include one or more baseband processors or control logic components to process baseband signals received from the receive signal path of RF circuitry 920 and generate baseband signals for the transmit signal path of RF circuitry 920. Baseband circuitry 904 may interact with application circuitry 902 to generate and process baseband signals and control the operation of RF circuitry 920. For example, in some embodiments, baseband circuitry 904 may include a third-generation (3G) baseband processor (3G baseband processor 906), a fourth-generation (4G) baseband processor (4G baseband processor 908), a fifth-generation (5G) baseband processor (5G baseband processor 910), or other existing, under development, or future generations of baseband processors 912 (e.g., second-generation (2G), sixth-generation (6G), etc.). Baseband circuitry 904 (e.g., one or more baseband processors) can handle various radio control functions that enable communication with one or more radio networks via RF circuitry 920. In other embodiments, some or all of the functions of the illustrated baseband processor may be included in modules stored in memory 918 and executed via a central processing unit ETnit (CPET 914). Radio control functions may include, but are not limited to, signal modulation / demodulation, encoding / decoding, RF shifting, etc. In some embodiments, the modulation / demodulation circuitry of baseband circuitry 904 may include Fast Fourier Transform (FFT), precoding, or constellation mapping / demapping functions. In some embodiments, the encoding / decoding circuitry of baseband circuitry 904 may include convolution, tail-biting convolution, turbo, Viterbi, or low-density parity-check (LDPC) encoder / decoder functions. Implementations of modulation / demodulation and encoder / decoder functions are not limited to these examples, and other suitable functions may be included in other embodiments.

[0106] In some embodiments, the baseband circuitry 904 may include a digital signal processor (DSP), such as one or more audio DSPs 916. The one or more audio DSPs 916 may include elements for compression / decompression and echo cancellation, and in other embodiments may include other suitable processing elements. In some embodiments, components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on the same circuit board. In some embodiments, some or all of the components of the baseband circuitry 904 and the application circuitry 902 may be implemented together, for example, on a system-on-a-chip (SoC).

[0107] In some implementations, baseband circuit 904 can provide communication compatible with one or more radio technologies. For example, in some implementations, baseband circuit 904 can support communication with the Evolved Universal Terrestrial Radio Access Network (EUTRAN) or other Wireless Metropolitan Area Networks (WMAN), Wireless Local Area Networks (WLAN), or Wireless Personal Area Networks (WPAN). Implementations in which baseband circuit 904 is configured to support radio communication with more than one radio protocol are referred to as multi-mode baseband circuits.

[0108] RF circuit 920 enables communication with a wireless network via a non-solid medium using modulated electromagnetic radiation. In various embodiments, RF circuit 920 may include switches, filters, amplifiers, etc., to facilitate communication with the wireless network. RF circuit 920 may include a receive signal path that includes circuitry for down-converting the RF signal received from FEM circuit 930 and providing a baseband signal to baseband circuit 904. RF circuit 920 may also include a transmit signal path that includes circuitry for up-converting the baseband signal provided by baseband circuit 904 and providing an RF output signal for transmission to FEM circuit 930.

[0109] In some embodiments, the receive signal path of RF circuit 920 may include mixer circuit 922, amplifier circuit 924, and filter circuit 926. In some embodiments, the transmit signal path of RF circuit 920 may include filter circuit 926 and mixer circuit 922. RF circuit 920 may also include synthesizer circuit 928 for synthesizing frequencies used by mixer circuit 922 for both the receive and transmit signal paths. In some embodiments, mixer circuit 922 for the receive signal path may be configured to down-convert the RF signal received from FEM circuit 930 based on the synthesized frequency provided by synthesizer circuit 928. Amplifier circuit 924 may be configured to amplify the down-converted signal, and filter circuit 926 may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signal to generate an output baseband signal. The output baseband signal may be provided to baseband circuit 904 for further processing. In some embodiments, although not required, the output baseband signal may be a zero-frequency baseband signal. In some implementations, the mixer circuit 922 for receiving the signal path may include a passive mixer, but the scope of the implementation is not limited in this respect.

[0110] In some implementations, the mixer circuit 922 of the transmit signal path may be configured to up-convert the input baseband signal based on the synthesized frequency provided by the synthesizer circuit 928 to generate an RF output signal for the FEM circuit 930. The baseband signal may be provided by the baseband circuit 904 and may be filtered by the filter circuit 926.

[0111] In some embodiments, the mixer circuit 922 for the receive signal path and the mixer circuit 922 for the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively. In some embodiments, the mixer circuit 922 for the receive signal path and the mixer circuit 922 for the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection). In some embodiments, the mixer circuit 922 for the receive signal path and the mixer circuit 922 may be arranged for direct downconversion and direct upconversion, respectively. In some embodiments, the mixer circuit 922 for the receive signal path and the mixer circuit 922 for the transmit signal path may be configured for superheterodyne operation.

[0112] In some embodiments, the output baseband signal and the input baseband signal may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternative embodiments, the output baseband signal and the input baseband signal may be digital baseband signals. In these alternative embodiments, the RF circuit 920 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry, and the baseband circuit 904 may include a digital baseband interface for communicating with the RF circuit 920.

[0113] In some dual-mode implementations, separate radio IC circuits can be provided to process signals for each spectrum, but the scope of the implementation is not limited in this respect.

[0114] In some implementations, synthesizer circuit 928 may be a fractional N synthesizer or a fractional N / N+1 synthesizer, but the scope of implementations is not limited in this respect, as other types of frequency synthesizers may also be suitable. For example, synthesizer circuit 928 may be a Δ-Σ synthesizer, a frequency multiplier, or a synthesizer including a phase-locked loop with a frequency divider.

[0115] Synthesizer circuit 928 can be configured to synthesize an output frequency based on the frequency input and the divider control input for use by mixer circuit 922 of RF circuit 920. In some embodiments, synthesizer circuit 928 may be a fractional N / N+1 synthesizer.

[0116] In some implementations, the frequency input may be provided by a voltage-controlled oscillator (VCO), although this is not mandatory. The divider control input may be provided by baseband circuitry 904 or application circuitry 902 (such as an application processor) according to the desired output frequency. In some implementations, the divider control input (e.g., N) may be determined from a lookup table based on the channel indicated by application circuitry 902.

[0117] The synthesizer circuit 928 of the RF circuit 920 may include a frequency divider, a delay-locked loop (DLL), a multiplexer, and a phase accumulator. In some embodiments, the frequency divider may be a dual-mode divider (DMD), and the phase accumulator may be a digital phase accumulator (DPA). In some embodiments, the DMD may be configured to divide the input signal by N or N+1 (e.g., based on carry) to provide a fractional division ratio. In some example embodiments, the DLL may include a cascaded, tunable delay element, a phase detector, a charge pump, and a set of D-type flip-flops. In these embodiments, the delay elements may be configured to divide the VCO cycle into Nd equal phase groups, where Nd is the number of delay elements in the delay line. Thus, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

[0118] In some embodiments, synthesizer circuitry 928 may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and frequency divider circuitry to generate multiple signals having multiple different phases relative to each other at the carrier frequency. In some embodiments, the output frequency may be the LO frequency (fLO). In some embodiments, RF circuitry 920 may include an IQ / polarity converter.

[0119] FEM circuit 930 may include a receive signal path, which may include circuitry configured to operate on RF signals received from one or more antennas 932, amplify the received signals, and provide an amplified version of the received signals to RF circuit 920 for further processing. FEM circuit 930 may also include a transmit signal path, which may include circuitry configured to amplify transmit signals provided by RF circuit 920 for transmission by one or more of the one or more antennas 932. In various embodiments, amplification via the transmit or receive signal path may be performed only in RF circuit 920, only in FEM circuit 930, or in both RF circuit 920 and FEM circuit 930.

[0120] In some embodiments, FEM circuit 930 may include a TX / RX switch to switch between transmit and receive mode operation. FEM circuit 930 may include a receive signal path and a transmit signal path. The receive signal path of FEM circuit 930 may include an LNA to amplify the received RF signal and provide the amplified received RF signal as an output (e.g., to RF circuit 920). The transmit signal path of FEM circuit 930 may include a power amplifier (PA) to amplify the input RF signal (e.g., provided by RF circuit 920), and one or more filters to generate an RF signal for subsequent transmission (e.g., through one or more antennas in one or more antennas 932).

[0121] In some implementations, the PMC 934 can manage the power supplied to the baseband circuitry 904. Specifically, the PMC 934 can control power selection, voltage scaling, battery charging, or DC-DC conversion. The PMC 934 is typically included when the device 900 can be battery powered, for example, when the device 900 is included in a UE. The PMC 934 can improve power conversion efficiency while providing the desired implementation size and thermal characteristics.

[0122] Figure 9The PMC 934 is shown coupled only to the baseband circuit 904. However, in other embodiments, the PMC 934 may additionally or alternatively be coupled to other components (such as, but not limited to, the application circuit 902, the RF circuit 920, or the FEM circuit 930) and perform similar power management operations for those components.

[0123] In some implementations, the PMC 934 can control or otherwise become part of various power-saving mechanisms of the device 900. For example, if the device 900 is in an RRC connected state, where it remains connected to the RAN node because it expects to receive communication soon, the device can enter a state called Discontinuous Receive Mode (DRX) after an inactive period. During this state, the device 900 can be powered down for short intervals, thereby saving power.

[0124] If there is no data service activity during the extended period, device 900 can transition to RRC Idle state. In RRC Idle state, the device is disconnected from the network and does not perform operations such as channel quality feedback or handover. Device 900 enters a very low power state and performs paging. In this very low power state, the device periodically wakes up again to listen to the network and then powers off again. Device 900 cannot receive data in this state, and in order to receive data, the device transitions back to RRC Connected state.

[0125] An additional power-saving mode allows the device to be unavailable from the network for periods exceeding the paging interval (ranging from seconds to hours). During this time, the device is completely unconnected to the network and can be completely powered off. Any data sent during this period will incur significant latency, which is assumed to be acceptable.

[0126] The processors of application circuitry 902 and baseband circuitry 904 are elements that can be used to execute one or more instances of the protocol stack. For example, the processor of baseband circuitry 904 can be used alone or in combination to execute layer 3, layer 2, or layer 1 functions, while the processor of application circuitry 902 can utilize data received from these layers (e.g., packet data) and further execute layer 4 functions (e.g., Transport Communication Protocol (TCP) and User Datagram Protocol (UDP) layers). As mentioned herein, layer 3 may include the Radio Resource Control (RRC) layer, which will be described in further detail below. As mentioned herein, layer 2 may include the Media Access Control (MAC) layer, Radio Link Control (RLC) layer, and Packet Data Convergence Protocol (PDCP) layer, which will be described in further detail below. As mentioned herein, layer 1 may include the physical (PHY) layer of the UE / RAN node, which will be described in further detail below.

[0127] Figure 10 An exemplary interface 1000 of a baseband circuit according to some embodiments is shown. As discussed above, Figure 9 The baseband circuitry 904 may include a 3G baseband processor 906, a 4G baseband processor 908, a 5G baseband processor 910, other baseband processors 912, a CPU 914, and a memory 918 utilized by the processors. As shown, each of these processors may include a corresponding memory interface 1002 to send data to / receive data from the memory 918.

[0128] The baseband circuit 904 may also include one or more interfaces for communicatively coupling to other circuits / devices, such as a memory interface 1004 (e.g., an interface for sending / receiving data to / from a memory external to the baseband circuit 904) or an application circuit interface 1006 (e.g., an interface for sending / receiving data to / from a memory external to the baseband circuit 904). Figure 9 The application circuit 902 is an interface for sending / receiving data, and the RF circuit interface 1008 is used for sending / receiving data to / from the application circuit 902. Figure 9 The RF circuit 720 is an interface for transmitting / receiving data, and the wireless hardware connection interface 1010 is used for transmitting / receiving data to / from near field communication (NFC) components. Components (e.g.) (low power consumption) Interfaces for sending / receiving data to / from components and other communication components) and power management interface 1012 (e.g., an interface for sending / receiving power or control signals to / from PMC 934).

[0129] Figure 11 This is a block diagram illustrating a component 1100, according to some exemplary embodiments, capable of reading instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and capable of executing any one or more of the methods discussed herein. Specifically, Figure 11 A schematic representation of hardware resources 1102 is shown, including one or more processors 1112 (or processor cores), one or more memory / storage devices 1118, and one or more communication resources 1120, each of which is communicatively coupled via bus 1122. For implementations utilizing node virtualization (e.g., NFV), an executable hypervisor 1104 provides an execution environment for one or more network slices / subslices to utilize hardware resources 1102.

[0130] Processor 1112 (e.g., a central processing unit (CPU), a reduced instruction set computing (RISC) processor, a complex instruction set computing (CISC) processor, a graphics processing unit (GPU), a digital signal processor (DSP) (such as a baseband processor), an application-specific integrated circuit (ASIC), a radio frequency integrated circuit (RFIC), another processor, or any suitable combination thereof) may include, for example, processor 1114 and processor 1116.

[0131] The memory / storage device 1118 may include main memory, disk storage, or any suitable combination thereof. The memory / storage device 1118 may include, but is not limited to, any type of volatile or non-volatile memory, such as dynamic random access memory (DRAM), static random access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state storage devices, etc.

[0132] Communication resource 1120 may include interconnect or network interface components or other suitable devices for communicating with one or more peripheral devices 1106 or one or more databases 1108 via network 1110. For example, communication resource 1120 may include wired communication components (e.g., for coupling via Universal Serial Bus (USB), cellular communication components, NFC components, etc. Components (e.g.) (low power consumption) Components and other communication components.

[0133] Instructions 1124 may include software, programs, applications, applets, or other executable code for causing at least one processor in processor 1112 to perform one or more of the methods discussed herein. Instructions 1124 may reside wholly or partially within processor 1112 (e.g., within the processor's cache memory), memory / storage device 1118, or at least one of any suitable combination thereof. Furthermore, any portion of instructions 1124 may be transferred from any combination of peripheral device 1106 or database 1108 to hardware resource 1102. Therefore, the memory of processor 1112, memory / storage device 1118, peripheral device 1106, and database 1108 are examples of computer-readable and machine-readable media.

[0134] For one or more embodiments, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described in the Examples section below. For example, the baseband circuitry 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 below. As another example, circuitry associated with the UE, base station, network element, etc., 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 shown in the Examples section below.

[0135] Figure 12 The architecture of a system 1200 of a network according to some embodiments is shown. System 1200 includes one or more user equipment (UEs), shown in this example as UE 1202 and UE 1204. UE 1202 and UE 1204 are shown as smartphones (e.g., handheld touchscreen mobile computing devices that can connect to one or more cellular networks), but it may also include any mobile or non-mobile computing device, such as a personal data assistant (PDA), pager, laptop computer, desktop computer, wireless handheld terminal, or any computing device that includes a wireless communication interface.

[0136] In some implementations, either UE 1202 or UE 1204 may include an Internet of Things (IoT) UE, which may include a network access layer designed to utilize low-power IoT applications with short-lived UE connections. The IoT UE may exchange data with an MTC server or device via technologies such as machine-to-machine (M2M) or machine-type communication (MTC), through a Public Land Mobile Network (PLMN), Proximity-Based Service (ProSe) or Device-to-Device (D2D) communication, sensor networks, or an IoT network. M2M or MTC data exchange may be machine-initiated data exchange. The IoT network describes interconnected IoT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure) with short-lived connections. The IoT UE may execute background applications (e.g., keeping track of activity messages, status updates, etc.) to facilitate connectivity within the IoT network.

[0137] UE 1202 and UE 1204 can be configured to connect (e.g., communicatively coupled) to a radio access network (RAN) (shown as RAN 1206). RAN 1206 can be, for example, an Evolved Universal Mobile Telecommunications System (ETMTS) Terrestrial Radio Access Network (E-UTRAN), a Next Generation RAN (NG RAN), or some other type of RAN. UE 1202 and UE 1204 utilize connection 1208 and connection 1210, respectively, where each connection includes a physical communication interface or layer (discussed in further detail below); in this example, connection 1208 and connection 1210 are shown as air interfaces for communicative coupling and can be consistent with cellular communication protocols such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA) network protocols, Push-to-Talk (PTT) protocols, Cellular PTT protocols (POC), Universal Mobile Telecommunications System (UMTS) protocols, 3GPP Long Term Evolution (LTE) protocols, 5G protocols, New Radio (NR) protocols, etc.

[0138] In this implementation, UE 1202 and UE 1204 can also directly exchange communication data via ProSe interface 1212. ProSe interface 1212 may alternatively be referred to as a sidelink interface including one or more logical channels, including but not limited to the Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Discovery Channel (PSDCH), and Physical Sidelink Broadcast Channel (PSBCH).

[0139] UE 1204 is shown configured to access an access point (AP) (shown as AP 1214) via connection 1216. Connection 1216 may include local wireless connectivity, such as a connection consistent with any IEEE 802.11 protocol, while AP 1214 will include Wireless Fibre. Router. In this example, AP 1214 can connect to the Internet without connecting to the core network of the wireless system (described in further detail below).

[0140] RAN 1206 may include one or more access nodes that enable connections 1208 and 1210. These access nodes (ANs) may be referred to as base stations (BS), node Bs, evolved Node Bs (eNBs), next-generation Node Bs (gNBs), RAN nodes, etc., and may include ground stations (e.g., terrestrial access points) or satellite stations that provide coverage within a geographic area (e.g., a cell). RAN 1206 may include one or more RAN nodes for providing macrocells, such as macro RAN node 1218, and one or more RAN nodes for providing femtocells or picocells (e.g., cells with smaller coverage, smaller user capacity, or higher bandwidth compared to macrocells), such as low-power (LP) RAN nodes (e.g., LP RAN node 1220).

[0141] Either macro RAN node 1218 or LP RAN node 1220 can terminate the air interface protocol and can be the first point of contact for UE 1202 and UE 1204. In some implementations, either macro RAN node 1218 or LP RAN node 1220 can fulfill various logical functions of RAN 1206, including but not limited to the functions of a radio network controller (RNC), such as radio bearer management, uplink and downlink dynamic radio resource management, data packet scheduling, and mobility management.

[0142] According to some implementations, UE 1202 and UE 1204 can be configured to communicate with each other or with either macro RAN node 1218 or LP RAN node 1220 on a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals based on various communication technologies, such as, but not limited to, orthogonal frequency division multiple access (OFDMA) communication technology (e.g., for downlink communication) or single-carrier frequency division multiple access (SC-FDMA) communication technology (e.g., for uplink and ProSe or sidelink communication)). However, the scope of the implementation is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0143] In some implementations, the downlink resource grid can be used for downlink transmissions from either RAN node 1218 or LP RAN node 1220 to UE 1202 and UE 1204, while uplink transmissions can utilize similar techniques. The grid can be a time-frequency grid, referred to as a resource grid or time-frequency resource grid, which represents the physical resources in the downlink within each time slot. This time-frequency plane representation is common practice for OFDM systems, making radio resource allocation intuitive. Each column and row of the resource grid corresponds to an OFDM symbol and an OFDM subcarrier, respectively. The duration of the resource grid in the time domain corresponds to a time slot in a radio frame. The smallest time-frequency unit in the resource grid is represented as a resource element. Each resource grid comprises multiple resource blocks that describe the mapping of certain physical channels to resource elements. Each resource block comprises a set of resource elements; in the frequency domain, this can represent the minimum amount of resources currently available for allocation. Such resource blocks are used to transmit several different physical downlink channels.

[0144] The Physical Downlink Shared Channel (PDSCH) can carry user data and higher-layer signaling to UE 1202 and UE 1204. The Physical Downlink Control Channel (PDCCH) can carry information such as the transmission format and resource allocation related to the PDSCH channel. The PDCCH can also inform UE 1202 and UE 1204 of the transmission format, resource allocation, and H-ARQ (Hybrid Automatic Repeat Request) information related to the uplink shared channel. Typically, downlink scheduling (allocating control and shared channel resource blocks to UE 1204 within the cell) can be performed at either macro RAN node 1218 or LP RAN node 1220 based on channel quality information fed back from either UE 1202 or UE 1204. Downlink resource allocation information can be transmitted on the PDCCH used for (e.g., allocated to) each of UE 1202 and UE 1204.

[0145] PDCCH can use Control Channel Elements (CCEs) to transmit control information. Before being mapped to resource elements, the complex-valued symbols of the PDCCH are first organized into quadruplets, which are then arranged using a sub-block interleaver for rate matching. One or more of these CCEs can be used to transmit each PDCCH, where each CCE can correspond to a set of four physical resource elements (REGs) of nine. Four Quadrature Phase Shift Keying (QPSK) symbols can be mapped to each REG. Depending on the size of the Downlink Control Information (DCI) and channel conditions, one or more CCEs can be used to transmit the PDCCH. In LTE, four or more different PDCCH formats with different numbers of CCEs (e.g., aggregation levels, L = 1, 2, 4, or 8) can exist.

[0146] Some implementations may use the concept of resource allocation for control channel information, which is an extension of the above concept. For example, some implementations may utilize an enhanced physical downlink control channel (EPDCCH) that uses PDSCH resources for control information transmission. EPDCCH may be transmitted using one or more enhanced control channel elements (ECCEs). Similarly, each ECCE may correspond to a set of nine physical resource elements, referred to as an enhanced resource element group (EREG). In some cases, an ECCE may have a different number of EREGs.

[0147] RAN 1206 is communicatively coupled to the core network (CN) (shown as CN 1228) via S1 interface 1222. In this implementation, CN 1228 may be an evolved packet core (EPC) network, a next-generation packet core (NPC) network, or some other type of CN. In this implementation, S1 interface 1222 is divided into two parts: S1-U interface 1224, which carries service data between macro RAN node 1218 and LP RAN node 1220 and the serving gateway (S-GW) (shown as S-GW 1232); and S1-Mobility Management Entity (MME) interface (shown as S1-MME interface 1226), which is the signaling interface between macro RAN node 1218 and LP RAN node 1220 and MME 1230.

[0148] In this implementation, CN 1228 includes an MME 1230, an S-GW 1232, a Packet Data Network (PDN) Gateway (P-GW) (shown as P-GW 1234), and a Home Subscriber Server (HSS) (shown as HSS 1236). The MME 1230 can functionally resemble the control plane of a legacy General Packet Radio Service (GPRS) Support Node (SGSN). The MME 1230 can manage access-related mobility aspects such as gateway selection and tracking area list management. The HSS 1236 may include a database for network users, containing subscription-related information for supporting the handling of communication sessions for network entities. Depending on the number of mobile subscribers, equipment capacity, network organization, etc., CN 1228 may include one or more HSS 1236s. For example, the HSS 1236 may provide support for routing / roaming, authentication, authorization, naming / addressing resolution, location correlation, etc.

[0149] The S-GW 1232 can terminate the S1 interface 322 toward RAN 1206 and route data packets between RAN 1206 and CN 1228. Additionally, the S-GW 1232 can serve as a local mobility anchor for inter-RAN node handover and can also provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful interception, billing, and enforcement of certain policies.

[0150] P-GW 1234 can terminate the SGi interface toward the PDN. P-GW 1234 can route data packets between CN 1228 (e.g., an EPC network) and external networks (such as a network including application server 1242 (alternatively referred to as application function (AF)) via an Internet Protocol (IP) interface (shown as IP communication interface 1238). Generally, application server 1242 can be an element that provides applications that use IP bearer resources with the core network (e.g., ETMTS Packet Service (PS) domain, LTE PS data service, etc.). In this embodiment, P-GW 1234 is shown communicatively coupled to application server 1242 via IP communication interface 1238. Application server 1242 can also be configured to support one or more communication services (e.g., Voice over Internet Protocol (VoIP) sessions, PTT sessions, group communication sessions, social networking services, etc.) for UE 1202 and UE 1204 via CN 1228.

[0151] P-GW 1234 can also be a node for policy enforcement and charging data collection. The Policy and Charging Enforcement Function (PCRF) (shown as PCRF 1240) is the policy and charging control element of CN 1228. In non-roaming scenarios, a single PCRF may exist in the domestic public land mobile network (HPLMN) associated with the ETE's Internet Protocol Connectivity Access Network (IP-CAN) session. In roaming scenarios with local traffic breaches, two PCRFs may exist associated with the UE's IP-CAN session: the domestic PCRF in the HPLMN (H-PCRF) and the visited PCRF in the visited public land mobile network (VPLMN) (V-PCRF). PCRF 1240 can be communicatively coupled to application server 1242 via P-GW 1234. Application server 1242 can signal PCRF 1240 to indicate new service flows and select appropriate Quality of Service (QoS) and charging parameters. PCRF 1240 can provide this rule to a Policy and Charging Enforcement Function (PCEF) (not shown) with an appropriate Flow Template (TFT) and QoS Category Identifier (QCI), which begins with QoS and charging specified by application server 1242.

[0152] Additional Examples

[0153] For one or more embodiments, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described in the Examples section below. For example, the SRS transmission method 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 below. As another example, the position hopping parameters 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 shown in the Examples section below.

[0154] The following examples relate to other implementation schemes.

[0155] Example 1 is a method for a base station (BS), the method comprising: generating control information associated with a probe reference signal (SRS) transmission for transmission to at least one user equipment (UE), wherein the control information indicates an SRS band including a plurality of resource blocks (RBs) for the SRS transmission, and the control information further indicates a first sub-band for a first UE and a second sub-band for a second UE in the same SRS band for the SRS transmission timing; and receiving SRS from the at least one UE at a plurality of SRS transmission timings according to the control information, wherein a location hopping parameter is applied to the plurality of SRS transmission timings, wherein a first start position of the first sub-band for the first UE at the first SRS transmission timing and a second start position of the first sub-band for the first UE at the second SRS transmission timing are determined based on the location hopping parameter.

[0156] Example 2 is the method according to Example 1, wherein a first starting position of the second subband for the second UE and a second starting position of the second subband for the second UE are determined based on the position hopping parameter during the first SRS transmission.

[0157] Example 3 is the method according to Example 1, wherein the position jump parameter is determined based on the step size parameter and an index associated with the SRS transmission timing.

[0158] Example 4 is the method according to Example 1, wherein the position jump parameter is determined by a linearly increasing function of the step size parameter and the index associated with the SRS transmission timing.

[0159] Example 5 is the method according to Example 4, wherein the SRS transmission is periodic or semi-persistent, and the index associated with the first SRS transmission timing is one of the following: a time slot index for the time slot of the first SRS transmission timing; a first transmission index of the first SRS transmission timing within a radio frame; or a second transmission index of the first SRS transmission timing within a radio frame of transmission timings having the same frequency position.

[0160] Example 6 is the method according to Example 4, wherein the SRS transmission is aperiodic and the index associated with the timing of the SRS transmission is one of the following: a third transmission index counting from the first triggered SRS; or a fourth transmission index based on the absolute position of the SRS transmission in the radio frame.

[0161] Example 7 is the method according to any one of Examples 3-6, wherein the step size parameter is common to the plurality of SRS transmission timings.

[0162] Example 8 is a method according to any one of Examples 3-6, wherein the step size parameter includes at least a first value for the first SRS transmission timing and a second value different from the first value for the second SRS transmission timing.

[0163] Example 9 is the method according to Example 8, wherein the step size parameter is configured by RRC or hardcoded into a table.

[0164] Example 10 is the method according to any one of Examples 7-9, wherein the step size parameter is 1 or a prime number greater than 2.

[0165] Example 11 is the method according to any one of Examples 7-10, wherein the step size parameter is less than the number of sub-bands configured in the SRS band.

[0166] Example 12 is the method according to any one of Examples 1-11, wherein the position transition parameters are configured per SRS-Resource.

[0167] Example 13 is the method according to any one of Examples 1-11, wherein the position transition parameters are configured per SRS-ResourceSet.

[0168] Example 14 is the method according to any one of Examples 5-11, wherein the position transition parameters are configured according to each non-periodic SRS trigger state.

[0169] Example 15 is a method according to any one of Examples 1-14, wherein the first SRS transmission timing and the second SRS transmission timing are configured for different time slots.

[0170] Example 16 is a method according to any one of Examples 1-14, wherein the first SRS transmission timing and the second SRS transmission timing are configured to be in the same time slot.

[0171] Example 17 is the method according to Example 16, wherein an intra-slot frequency hopping parameter is applied to the first SRS transmission timing and the second SRS transmission timing, and wherein the intra-slot frequency hopping parameter indicates that different frequency ranges are allocated to the first SRS transmission timing and the second SRS transmission timing.

[0172] Example 18 is the method according to Example 17, wherein the frequency hopping parameter within the time slot indicates the offset of the SRS transmission timing within the same time slot.

[0173] Example 19 is the method according to Example 18, wherein the frequency hopping parameter within the time slot is a linearly increasing function or is hard-coded as a table.

[0174] Example 20 is a method for a user equipment (UE), the method comprising: receiving control information associated with probe reference signal (SRS) transmission from a base station, wherein the control information indicates an SRS band comprising a plurality of resource blocks (RBs), and the control information further indicates a sub-band for the UE in the SRS band for an SRS transmission timing; transmitting SRS to the base station at a plurality of SRS transmission timings according to the control information, wherein a location hopping parameter is applied to the plurality of SRS transmission timings, wherein a first start position of the sub-band for the UE at a first SRS transmission timing and a second start position of the sub-band for the first UE at a second SRS transmission timing are determined based on the location hopping parameter.

[0175] Example 21 is the method according to Example 20, wherein a first starting position for another subband of another UE during the first SRS transmission timing and a second starting position for another subband of another UE during the second SRS transmission timing are determined based on the position hopping parameter.

[0176] Example 22 is the method according to Example 20, wherein the position jump parameter is determined based on the step size parameter and an index associated with the SRS transmission timing.

[0177] Example 23 is the method according to Example 20, wherein the position jump parameter is determined by a linearly increasing function of the step size parameter and the index associated with the SRS transmission timing.

[0178] Example 24 is the method according to Example 23, wherein the SRS transmission is periodic and the index associated with the SRS transmission timing is one of the following: a time slot index for the time slot of the SRS transmission timing; a first transmission index of the SRS transmission timing within a radio frame; or a second transmission index of the SRS transmission timing within a radio frame among transmission timings having the same frequency position.

[0179] Example 25 is the method according to Example 23, wherein the SRS transmission is aperiodic and the index associated with the timing of the SRS transmission is one of the following: a third transmission index counting from the first triggered SRS; or a fourth transmission index based on the absolute position of the SRS transmission in the radio frame.

[0180] Example 26 is a method according to any one of Examples 22-25, wherein the step size parameter is common to the plurality of SRS transmission timings.

[0181] Example 27 is a method according to any one of Examples 22-25, wherein the step size parameter includes at least a first value for the first SRS transmission timing and a second value different from the first value for the second SRS transmission timing.

[0182] Example 28 is the method according to Example 27, wherein the step size parameter is configured by RRC or hardcoded as a table.

[0183] Example 29 is the method according to any one of Examples 26-28, wherein the step size parameter is 1 or a prime number greater than 2.

[0184] Example 30 is the method according to any one of Examples 26-29, wherein the step size parameter is less than the number of sub-bands configured in the SRS band.

[0185] Example 31 is the method according to any one of Examples 20-30, wherein the position transition parameters are configured per SRS-Resource.

[0186] Example 32 is the method according to any one of Examples 20-30, wherein the position transition parameters are configured per SRS-ResourceSet.

[0187] Example 33 is the method according to any one of Examples 24-30, wherein the position transition parameters are configured according to each non-periodic SRS trigger state.

[0188] Example 34 is a method according to any one of Examples 20-33, wherein the first SRS transmission timing and the second SRS transmission timing are configured for different time slots.

[0189] Example 35 is a method according to any one of Examples 20-33, wherein the first SRS transmission timing and the second SRS transmission timing are configured to be in the same time slot.

[0190] Example 36 is the method according to Example 35, wherein an intra-slot frequency hopping parameter is applied to the first SRS transmission timing and the second SRS transmission timing, and wherein the intra-slot frequency hopping parameter indicates that different frequency ranges are allocated for the first SRS transmission timing and the second SRS transmission timing.

[0191] Example 37 is the method according to Example 36, wherein the frequency hopping parameter within the time slot indicates the offset of the SRS transmission timing within the same time slot.

[0192] Example 38 is the method according to Example 37, wherein the frequency hopping parameter within the time slot is a linearly increasing function or is hard-coded into a table.

[0193] Example 39 is an apparatus for a network, the apparatus comprising: one or more processors configured to perform the steps of the method according to any one of Examples 1-19.

[0194] Example 40 is an apparatus for a user equipment (UE), the apparatus comprising: one or more processors configured to perform the steps of the method according to any one of Examples 20-38.

[0195] Example 41 is a computer-readable medium having stored thereon computer programs that, when executed by one or more processors of the device, cause the device to perform the steps of the method according to any one of Examples 1-38.

[0196] Example 42 is a computer program product comprising a computer program that, when executed by one or more processors of a device, causes the device to perform the steps of the method according to any one of Examples 1-38.

[0197] 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 embodiments provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise forms disclosed. In view of the teachings above, modifications and variations are possible, or modifications and variations may be obtained from the practice of various embodiments.

[0198] It should be recognized that the systems described herein include descriptions of specific implementations. These implementations may be combined into a single system, partially integrated into other systems, divided into multiple systems, or otherwise partitioned or combined. Furthermore, it is conceivable to use parameters / attributes / aspects, etc., of one implementation in another implementation. For clarity, these parameters / attributes / aspects, etc., are described only in one or more implementations, and it should be recognized that unless specifically stated herein, these parameters / attributes / aspects, etc., may be combined with or replace parameters / attributes, etc., of another implementation.

[0199] As is widely recognized, the use of personally identifiable information should comply with privacy policies and practices that are generally accepted to meet or exceed industry or governmental requirements for protecting 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 authorized use should be clearly explained to users.

[0200] Although the foregoing has been described in considerable detail for clarity, it will be apparent that certain changes and modifications can be made without departing from the principles of this disclosure. It should be noted that there are many alternative ways to implement both the processes and apparatus described herein. Therefore, embodiments of this disclosure should be considered illustrative rather than restrictive, and this specification is not limited to the details given herein but can be modified within the scope of the appended claims and their equivalents.

Claims

1. A method for wireless communication, the method comprising: Control information associated with a Sounding Reference Signal (SRS) is generated for transmission to a User Equipment (UE). This control information indicates an SRS band comprising multiple sub-bands, including a first sub-band, a second sub-band with a frequency adjacent to the first sub-band, a third sub-band with a frequency adjacent to the second sub-band, and a fourth sub-band with a frequency adjacent to the third sub-band. The control information also indicates frequency hopping parameters and position hopping parameters. The SRS is received from the UE according to the control information. in: In the first transition cycle of a plurality of transition cycles, the SRS is in the first sub-band based on the position transition parameters, and the SRS frequency band is in the first frequency position based on the frequency hopping parameters; In the second hopping cycle of the plurality of hopping cycles, the SRS is in the third sub-band based on the position hopping parameters, and the SRS frequency band is in the second frequency position based on the frequency hopping parameters; In the third hopping cycle of the plurality of hopping cycles, the SRS is in the second sub-band based on the position hopping parameters, and the SRS frequency band is in the third frequency position based on the frequency hopping parameters; and In the fourth hopping cycle of the plurality of hopping cycles, the SRS is in the fourth sub-band based on the position hopping parameter, and the SRS frequency band is in the fourth frequency position based on the frequency hopping parameter.

2. The method according to claim 1, wherein the first frequency position is different from the second frequency position and partially overlaps with the second frequency position.

3. The method of claim 1, wherein the position jump parameter is based on a step size parameter and an index associated with a jump cycle among the plurality of jump cycles.

4. The method of claim 3, wherein the position jump parameter is determined by a linearly increasing function of the step size parameter and the index associated with the jump period.

5. The method of claim 3, wherein the SRS is periodic or semi-permanent.

6. The method of claim 3, wherein the SRS is a triggered aperiodic (AP)-SRS.

7. The method according to claim 3, wherein the step size parameter is 1, a prime number greater than 2, or less than the number of subbands configured in the SRS band.

8. The method according to any one of claims 3-7, wherein the step size parameter is common to the plurality of transition cycles.

9. The method according to any one of claims 3-7, wherein the step size parameter includes at least a first value for the first transition period and a second value different from the first value for the second transition period.

10. The method of claim 1, wherein the position transition parameters are configured per SRS-Resource, per SRS-ResourceSet, or per aperiodic SRS trigger state.

11. The method of claim 1, wherein the first transition period and the second transition period are configured within the same time slot.

12. The method of claim 11, wherein the plurality of transition cycles are a first plurality of transition cycles, the position transition parameter is a first position transition parameter applied to the first plurality of transition cycles, and the control information is further used to indicate a second position transition parameter for a second plurality of transition cycles.

13. The method of claim 12, wherein the control information indicates the offset between the first transition period and the second transition period.

14. A method for wireless communication, the method comprising: Control information associated with a Sounding Reference Signal (SRS) is received from a base station, wherein the control information indicates an SRS frequency band comprising multiple sub-bands, the multiple sub-bands including a first sub-band, a second sub-band with a frequency adjacent to the first sub-band, a third sub-band with a frequency adjacent to the second sub-band, and a fourth sub-band with a frequency adjacent to the third sub-band, and the control information further indicates frequency hopping parameters and position hopping parameters; and The SRS is transmitted to the base station. in: In the first transition cycle of a plurality of transition cycles, the SRS is in the first sub-band based on the position transition parameters, and the SRS frequency band is in the first frequency position based on the frequency hopping parameters; In the second hopping cycle of the plurality of hopping cycles, the SRS is in the third sub-band based on the position hopping parameters, and the SRS frequency band is in the second frequency position based on the frequency hopping parameters; In the third hopping cycle of the plurality of hopping cycles, the SRS is in the second sub-band based on the position hopping parameters, and the SRS frequency band is in the third frequency position based on the frequency hopping parameters; and In the fourth hopping cycle of the plurality of hopping cycles, the SRS is in the fourth sub-band based on the position hopping parameter, and the SRS frequency band is in the fourth frequency position based on the frequency hopping parameter.

15. The method of claim 14, wherein the position transition parameter is based on a step size parameter and an index associated with a transition period among the plurality of transition periods, and the SRS is periodic.

16. The method of claim 14, wherein the position jump parameter is determined based on a step size parameter and an index associated with a jump cycle among the plurality of jump cycles, and the SRS is a triggered aperiodic (AP)-SRS.

17. The method of claim 14, wherein the first transition period and the second transition period are configured in the same time slot, and the first frequency position is different from the second frequency position and partially overlaps with the second frequency position.

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