Design and configuration of reference signals in wireless communication systems

Abstract

Methods, systems, and devices for designing and configuring reference signals in a wireless communication system are disclosed. An example method for wireless communication includes transmitting, by a wireless device, a sounding reference signal (SRS) to a network node, where the SRS is determined by a first parameter and a cyclic shift parameter, and a value of the first parameter hops on a level of time units of a first type, and a value of the cyclic shift parameter hops on a level of time units of a second type. And the value of the cyclic shift parameter hops at the level of the second type of time unit. Another example method for wireless communication includes receiving, by a wireless device, a configuration for an SRS resource from a network node, and transmitting an SRS in the SRS resource, where the configuration includes information associated with one or more time domain orthogonal cover codes (TD-OCC) or multiplexing types for a plurality of SRS ports in the SRS resource.

Description

Technical Field

[0001] The present disclosure relates generally to digital wireless communications. Background Art

[0002] Mobile telecommunication technologies are driving the world towards an increasingly connected and networked society. Compared to existing wireless networks, the next generations of systems and wireless communication technologies will need to support a wider range of use case characteristics and provide a more complex and fine-grained range of access requirements and flexibility.

[0003] Long-Term Evolution (LTE) is a standard for wireless communications for mobile devices and data terminals developed by the 3rd Generation Partnership Project (3GPP). LTE Advanced (LTE-A) is a wireless communications standard that enhances the LTE standard. The fifth generation wireless system, known as 5G (Fifth Generation), advances the LTE and LTE-A wireless standards and is committed to supporting higher data rates, a large number of connections, ultra-low latency, high reliability, and other emerging business needs. Summary of the invention

[0004] Disclosed are techniques for designing and configuring reference signals (e.g., sounding reference signals (SRS)) in wireless communication systems. An SRS in an SRS resource is determined by a first parameter (e.g., a group parameter or a sequence parameter) and a cyclic shift (CS) parameter, which are configured at the level of a first type of time unit and / or a second type of time unit (e.g., one or more OFDM (Orthogonal Frequency Division Multiplexing) symbols). Among other benefits and advantages, the described embodiments reduce inter-cell interference.

[0005] In one example aspect, a method for wireless communication is disclosed. The method includes: sending, by a wireless device, a sounding reference signal (SRS) to a network node, wherein the sounding reference signal is determined by a first parameter and a cyclic shift parameter, wherein a value of the first parameter is hopped at a level of a first type of time unit, and a value of the cyclic shift parameter is hopped at a level of a second type of time unit.

[0006] In another example aspect, a method for wireless communication is disclosed. The method includes: receiving, by a network node, a sounding reference signal (SRS) from a wireless device, and performing further communication with the wireless device based on the SRS, wherein the sounding reference signal is determined by a first parameter and a cyclic shift parameter, wherein a value of the first parameter is jumped at a level of a first type of time unit, and a value of the cyclic shift parameter is jumped at a level of a second type of time unit.

[0007] In yet another example aspect, a method for wireless communication is disclosed. The method includes: sending, by a network node, a configuration for a sounding reference signal (SRS) resource to a wireless device; receiving an SRS in the SRS resource, wherein the configuration includes information associated with a time-domain orthogonal cover code (TD-OCC) or a multiplexing type for a plurality of SRS ports in the SRS resource.

[0008] In yet another example aspect, a method for wireless communication is disclosed. The method includes receiving, by a wireless device, a configuration for a sounding reference signal (SRS) resource from a network node, and sending the SRS in the SRS resource, wherein the configuration includes information associated with one or more time domain orthogonal cover codes (TD-OCC) or multiplexing types for a plurality of SRS ports in the SRS resource.

[0009] In another exemplary aspect, the above method is implemented in the form of processor executable code and stored in a non-transitory computer readable storage medium. The code included in the computer readable storage medium causes the processor to implement the method described in this patent document when executed by the processor.

[0010] In yet another exemplary embodiment, a device configured or operable to perform the above method is disclosed.

[0011] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figures 1 to 4 An example flow diagram for wireless communications is shown.

[0013] Figure 5 An exemplary block diagram of a hardware platform that may be part of a network device or a communication device is shown.

[0014] Figure 6 An example of wireless communication including a base station (BS) and a user equipment (UE) based on some embodiments of the disclosed technology is shown. DETAILED DESCRIPTION

[0015] In the fifth generation (5G) New Radio (NR), time division duplexing (TDD) based networks are becoming the preferred implementation because wide spectrum or ultra-wide spectrum requirements make frequency division duplexing (FDD) based networks infeasible. In these systems, channel reciprocity is exploited, and therefore, SRS design is critical for wireless channel estimation for both downlink (DL) and uplink (UL) transmissions.

[0016] The example titles of the following sections are used to facilitate understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Therefore, one or more features of one example section may be combined with one or more features of another example section. Further, for clarity of explanation, 5G terminology is used, but the technology disclosed in this document is not limited to 5G technology and can be used in wireless systems implementing other protocols.

[0017] Example Embodiments Using Cyclic Shift (CS) Hopping

[0018] In some embodiments, a wireless device (e.g., a UE) may determine a group number u (or sequence number v) and a cyclic shift (CS) of a sounding reference signal (SRS) sequence. The UE then sends an SRS, wherein the group number u and the cyclic shift change simultaneously when the time domain unit changes, i.e., the group number u and the cyclic shift are both determined based on the index of the time domain unit. In one example, the time domain unit may be one OFDM symbol or more than one OFDM symbol. In another example, the time domain unit is a time domain unit of SRS frequency domain hopping. The SRS may occupy the same frequency domain resources in one time domain unit of frequency domain hopping. The SRS may occupy different frequency domain resources between two adjacent time domain units of frequency domain hopping. Each OFDM in each time domain unit of the SRS includes an SRS. Two adjacent time domain units of the SRS may be on non-continuous OFDM symbols. For example, the first time domain unit is on OFDM{4,5} in time slot n, and the second time domain unit is on OFDM{4,5} in time slot n+1.

[0019] In the described embodiment, the group number u (or the sequence number ν) is represented as the first parameter. That is, the first parameter comprises one of the following: the group number u or the sequence number ν.

[0020] In some embodiments, the time domain unit may be a repeated time domain unit. When frequency hopping is enabled, the repeated time domain unit and the time domain unit of frequency domain hopping are the same.

[0021] In some embodiments, the SRS ports occupy the same frequency resources in one repetitive time domain unit.

[0022] In some embodiments, the time unit may be a time domain orthogonal cover code (TD-OCC) time domain unit, which includes T consecutive OFDM symbols, where T is the length of the TD-OCC.

[0023] In some embodiments, the first parameter and CS jump at the level of different types of time units. For example, the first parameter jumps at the level of the first type of time unit, and the CS jumps at the level of the second type of time unit. In one example, the two types of time units can include different numbers of OFDM symbols. In other examples, the first type of time unit and the second type of time unit can be the same type of time unit, for example, including the same number of OFDM symbols.

[0024] In some embodiments, the SRS sequence is a low peak-to-average power ratio (PAPR) sequence. According to the following formula, the basic sequence The cyclic shift α is defined as:

[0025]

[0026] In this article, is the length of the sequence. Multiple sequences are defined from a single base sequence by different values ​​of α (cyclic shift parameter) and δ (comb parameter). In some embodiments, multiple sequences are defined from a single base sequence by different values ​​of α. It should be noted that an OFDM symbol consists of 2 δ combs, and one SRS port occupies one comb in one OFDM symbol.

[0027] In some embodiments, the base sequence is divided into multiple groups, where {u=0,1,...,29} is the group number and v is the base sequence number within the group, so that each group contains each length A base sequence (v=0) and each length Two basic sequences (v = 0, 1). Basic sequence The definition depends on the sequence length M ZC .

[0028] In one example, for Basic sequence Given by:

[0029]

[0030] In this article,

[0031]

[0032] In this paper, the length N ZC Given by the largest prime number such that N ZC <M ZC .

[0033] For M ZC ={6,12,18,24}, the base sequence is given by:

[0034]

[0035] In this paper, the value of φ(n) is given by a predefined table.

[0036] For M ZC =30, basic sequence Given by:

[0037]

[0038] As shown in the above example, the SRS sequence is determined by the group number u, the cyclic shift α, and the sequence number v which is the base sequence number v.

[0039] In some embodiments, for a One SRS resource for each SRS port, antenna port The cyclic shift α i is given as:

[0040]

[0041]

[0042] Among them, Δ cs ∈{0,1,...,F-1} is configured by the gNB.

[0043] SRS port p i The sequence is given as:

[0044]

[0045] In this document, F is an integer. In some embodiments, F is equal to is the maximum number of cyclic shifts for a comb. In some embodiments, Depends on the number of combs.

[0046] In some embodiments, the first parameter and the cyclic shift are changed simultaneously when the time domain unit index changes to reduce inter-cell interference of the SRS. The CS hopping equation is configured (or designed) to ensure that the CS is different when the first parameter is the same at a given time. Alternatively, the first parameter hopping equation is configured (or designed) to ensure that the first parameter is different when the CS is the same at a given time.

[0047] For example, the group number u is determined by the following equation:

[0048]

[0049] Among them, f gh Determined by:

[0050]

[0051] In this article, Determined by signaling or by rules. For example, if the UE does not receive a request for an SRS resource Configuration, then the SRS resources for In this scenario, is selected by the UE during initial access to the cell, or It is the physical cell index for the serving cell.

[0052] In some embodiments, is an integer in the range [0,1024]. In other embodiments, is an integer in the range [0,65535]. In some other embodiments, belongs to [0,N], where N is an integer. Usually, The SRS resource configured to include the SRS.

[0053] In equation (1-2), It is the frame that includes SRS and is spaced 2 from the subcarrier μ *15kHz corresponding to the time slot index, and l0+l' is the index of the OFDM symbol including SRS in the time slot. The index l0+l' is the index of the OFDM symbol including SRS in the time slot OFDM index in OFDM symbols, and is the number of OFDM symbols in one time slot, l0 is the index of the starting OFDM symbol including SRS in the time slot, and l' is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol including SRS in the time slot. If the time unit of the first type includes more than one OFDM symbol and the first parameter jumps at the level of the time unit of the first type, then l' is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol including SRS in the time slot, except in the case of OFDM symbols in one time unit of the first type, in which case l' is the relative index of the starting SRS OFDM symbol in the one time unit of the first type. Furthermore, C is the total number of groups. In one example, C is equal to 30. In another example, C is a value greater than 30. 2 D is equal to or greater than C. For example, D is equal to 8. In this article, l firsttimeunit is the index of the time unit of the first type.

[0054] Continuing with (2-2) or (2-3), c(x) is the xth bit in the universal pseudo-random sequence, which can be defined by a Gold sequence of length 31. PN The output sequence c(n) is defined by the following formula, where n = 0, 1, ..., M PN -1:

[0055]

[0056] In this article, and in one example, N C = 1600, the first m-sequence x1(n) can be initialized by x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 30, and the second m-sequence x2(n) is initialized by is represented by a value that depends on the application of the sequence. Therefore, c init Different values ​​of result in the generation of different pseudo-random sequences.

[0057] In some embodiments, c used to generate the pseudo-random sequence for group number u in equation (2-1) or (2-3) is init It can be determined by one of the following methods:

[0058]

[0059] In the first embodiment, in order to generate the CS hopping pattern and the first parameter hopping pattern, the first parameter is based on the CS hopping pattern. init The first value of the first pseudo-random sequence is generated, and CS is based on c init The second pseudo-random sequence is generated by using the second value of c.init The first value of the first pseudo-random sequence is determined by, c init The first value of is determined by one of equations (4) or (5). init The second value of is determined by one of the following equations:

[0060]

[0061] In this document, F is an integer. In some embodiments, F is equal to is the maximum number of cyclic shifts for one comb and may depend on the number of combs. is a value configured by the gNB, and Δ is an integer configured by the gNB or determined by a rule. In one example, Δ is determined by the C-RNTI (Cell-Radio Network Temporary Identifier) ​​of the UE. In another example, Δ is determined by the PCI (physical cell index) associated with the SRS resource. In some embodiments, Δ can be configured for each UE, for each serving cell, for each PCI, or for each SRS resource set including one or more SRS resources. In some embodiments, the number of bits used to configure Δ is less than the number of bits used to configure For example, the number of bits used to configure Δ is 3 bits, which is used to configure The number of bits of is 10 bits. k and k0 belong to {0, 1, ..., F-1} and are configured by the network node, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l'.

[0062] In some embodiments, the second pseudo-random sequence is calculated according to c shown in one of equations (6) to (9). init The second value of and l0+l to be generated. For example, f cs is determined by one of the following equations:

[0063]

[0064] In this article, E is an integer. For example, 2 EGreater than or equal to F, for example, E is equal to 4, 5 or 6. In this document, in response to a time unit of the second type including one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, and l' is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol including the SRS in the time slot. In this document, in response to a time unit of the second type including more than one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, l' is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol, except for the case of OFDM in one time unit, in which case l' is the relative index of the first SRS OFDM symbol in the one time unit, and wherein l secondtimeunti is the index of the second type of time unit including the SRS. CS hops at the level of the second type of time unit. CS remains the same over multiple OFDM symbols in one second type of time unit and hops between two adjacent second type of time units.

[0065] In the second embodiment, in order to generate the CS hopping pattern and the first parameter hopping pattern, the first parameter and CS may be based on c using the same value. init In some embodiments, the first parameter and the CS parameter are based on bits in different positions of the same bit sequence. In other embodiments, the first bit set in the sequence for the first parameter and the second bit in the sequence for the CS parameter may overlap (or be the same). For example, the group number u and the cyclic shift are based on the same pseudo-random sequence, but they correspond to different bit positions of the same pseudo-random sequence.

[0066] In one example, the same pseudo-random sequence is generated by one of equations (4) to (9). In the first scenario,

[0067]

[0068] or

[0069]

[0070] In the second scene,

[0071]

[0072] or

[0073]

[0074] In the third scene,

[0075]

[0076] Then, in equation (1-6) or (1-7) Determined by one of the following equations:

[0077]

[0078]

[0079] In this framework, an SRS resource The SRS ports are shared by f cs The same CS hopping pattern is determined.

[0080] In a third embodiment, the CS hopping is determined by the first parameter hopping pattern, or the first parameter is determined by the CS hopping. For example, Determined by one of the following equations:

[0081]

[0082] Here, k and k0 belong to {0, 1, ..., F-1} and are configured by the network node, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l′ or by the index of the second time unit.

[0083] Similarly, if the first parameter is a sequence number v, then when the domain unit index changes, both the sequence number and the CS change. In this article, the sequence number is determined by the following equation:

[0084]

[0085] In a first embodiment, the sequence number and CS are based on different sequences. The sequence number is based on the use of c init The first value of the first pseudo-random sequence c(x), c init The first value of is determined by one of equations (4) or (5). CS is based on the use of c init The second pseudo-random sequence of the second value c(x), c init The second value of is determined by one of equations (6), (8), (9), (22), (23), (24-1), (24-2), (24-3), or (24-4).

[0086]

[0087] Wherein, k and k0 belong to {0, 1, ..., F-1} and are configured by the network node, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l′ or by the index of the second time unit.

[0088] In this document, P is an integer. In some embodiments, P is greater than or equal to For example, if Then P is equal to 1024. If Then P is equal to 65536. Determined by one of equations (17) to (19), f cs Determined by one of equations (10) or (11), k belongs to {0, 1, ..., F-1} and is configured by the gNB, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l = l0 + l'. For example, k changes for different l. In some embodiments, l is the OFDM symbol index in the time slot, except for the case where the OFDM symbol is in each second type of time unit, in which case l is the starting OFDM symbol index in each second type of time unit.

[0089] In a second embodiment, the sequence number and CS are based on different bits in the same sequence. init Determined by one of equations (4) or (5). For example, the serial number is determined by one of the following equations:

[0090]

[0091] Herein, H is an integer. For example, H is equal to 1.

[0092] In some embodiments, in equation (1-6) or (1-7) is determined by one of equations (17), (18-1), (18-2) or (19), and f cs Determined by one of the following equations:

[0093]

[0094] Note that equations (13) and (14) have similar forms to equations (27) and (28), and equations (16-1) and (16-2) have similar forms to equations (29) and (30).

[0095] In a third embodiment, the CS hopping is determined by the first parameter hopping pattern. For example, the sequence number is determined by equation (21), and the CS is determined by one of the following equations:

[0096]

[0097]

[0098] In some embodiments, the equations for determining CS are different in different modes. In the first mode, when the field unit index changes, both the CS and the group number change, but the sequence number does not change. In the first mode, CS can be determined by one of equations (17)-(20), and f cs is determined by one of equations (10), (11), (13), (14), (16-1), or (16-2). In the second mode, when the time domain unit index changes, both the CS and the sequence number jump, but the group number does not jump. In the second mode, CS can be determined by one of equations (17) to (19) and (31) to (33), and f cs Determined by one of equations (10), (11), (27), (28), (29) or (30).

[0099] In other modes, only one of the group number, sequence number, or CS changes when the time domain unit index changes. For example, in a third mode, when the time domain unit index changes, only the group number changes, while the sequence number and CS do not change. In yet another mode, when the time domain unit index changes, the group number, sequence number, and CS all do not change. In these scenarios, the gNB is configured to inform the UE which mode the UE should use when the UE sends SRS.

[0100] In the above embodiment, the first time domain unit for the first parameter hopping and the second time domain unit for the CS hopping may be the same. In this article, when the time domain unit index of the first type changes, the first parameter changes and remains unchanged in the first time domain unit. Similarly, when the second time domain unit index changes, the CS changes and remains unchanged in the second time domain unit. In one example, the first time domain unit and the second time domain unit may be an OFDM symbol, or a time unit including one or more OFDM symbols of SRS hopping. In other embodiments, the time domain unit of the first type is different from the time domain unit of the second type. For example, the time domain unit of the first type includes one OFDM symbol, and the time domain unit of the second type includes more than one OFDM symbol. In some embodiments, for all OFDM symbols in the time unit of the second type or the time unit of the first type, the OFDM symbol index in the l0+l' hopping equation such as equations (2), (10) to (16) and (25) to (30) is the same. For example, for all OFDM symbols in each time unit including the second type of time unit and / or the first type of time unit, l' is the relative index of the starting SRS OFDM symbol in each time unit. Alternatively, l0+l'=l firsttimeunit In the jump equation of the first parameter, and l0+l'=l secondtimeunti In the CS parameter jump equation. In some embodiments,

[0101] Where l' is the relative index of the SRS OFDM symbol relative to l0, is the number of time slots in a frame, n f is the frame index, T offset T SRS SRS

[0102] The cycle offset and the period of SRS, R is the repetition factor of SRS (e.g., the number of OFDM in the time unit of frequency hopping), is the number of OFDM symbols including SRS in one slot, and n SRS is the time unit index of the SRS frequency hopping. In some implementations,

[0103] Example Embodiment Using Time Domain Orthogonal Cover Codes (TD-OCC)

[0104] Embodiments of the disclosed technology may be implemented such that: (i) one SRS resource corresponds to one TD-OCC, or (ii) one SRS resource corresponds to more than one TD-OCC, wherein one SRS resource may include one or more SRS resources. In some embodiments, option (ii) is more suitable for the co-scheduling of SRS resources of different UEs with different repetition factors. For example, two combs and two CSs may be assigned to one SRS resource with four SRS ports. If a TD-OCC with a repetition factor of 4 is used, one comb and one CS may be assigned to one SRS resource. Different combs and different CSs may be assigned to different UEs with different repetition factors.

[0105] The described embodiments using TD OCC are well suited for scenarios where the UE is moving at low speed, whereas the embodiments using CS (as described in the previous section) are more suitable for scenarios with low delay spread.

[0106] In some embodiments, based on the scenario, the SRS port in one SRS resource may be multiplexed by at least one of CS, TD-OCC or comb. Signaling may be used to notify the multiplexing type of the SRS port for one SRS resource. For example, the signaling notifies that the SRS port may occupy one comb in one SRS resource, or occupy different cyclic shifts, or occupy different TD-OCCs. When a comb-shaped SRS port in one SRS resource occupies different cyclic shifts, the SRS port is multiplexed using different cyclic shifts, that is, the SRS port is multiplexed using FD-OCC. When a comb-shaped SRS port in one SRS resource occupies different TD-OCCs, the SRS port is multiplexed by different TD-OCCs.

[0107] In some embodiments, the length of the TD-OCC may be signaled, either equal to the repetition factor R, or the repetition factor R includes a multiple of the TD-OCC length. The SRS ports may occupy the same frequency domain resources in one repetition time domain unit. If frequency hopping is enabled, the SRS ports may occupy different frequency domain resources in two adjacent repetition time domain units. That is, the repetition time domain unit may be designed as a time domain unit for SRS frequency domain hopping.

[0108] In one example, if frequency hopping is enabled in one slot, {R=1, 2, 4, 5, 6, 7, 8, 10, 12, 14}, the length of the TD-OCC may be dynamically signaled and the candidate for the length of the TD-OCC may be one of {1, 2, 4, 5, 6, 7, 8, 10, 12, 14}.

[0109] In another example, if frequency hopping is disabled in one slot, {R=1, 2, 4, 8, 10, 12, 14}, the candidate for the length of the TD-OCC may be one of the values ​​in the set {1, 2, 4, 8, 10, 12, 14}.

[0110] In another example, if TD-OCC is enabled, there are two options for establishing a relationship between the time unit of sequence hopping and the length of TD-OCC. For example, the length relationship of TD-OCC can be represented by one of the following equations:

[0111]

[0112] In this paper, y i corresponds to the received signal on the i-th resource element (RE) of a TD-OCC, n is the noise on the channel, and h i is the channel associated with the i-th TD-OCC. For example, h1 corresponds to [1,1,1,1], h2 corresponds to [1,-1,1,-1], h3 corresponds to [1,1,-1,-1], and h4 corresponds to [1,-1,-1,1], and r is an SRS sequence that can be determined by equation (1-1).

[0113] If equation (34) is used (expressed as option #1), the SRS sequence can be different on different OFDM symbols of the 4 OFDM symbols corresponding to TD-OCC, and the time unit of the sequence hopping can be independent of TD-OCC. However, two SRS resources (or two SRS ports) with partially overlapping bandwidths may not be orthogonal, or two SRS resources (or two SRS ports) with the same overlapping bandwidth may be orthogonal. For example, the port group is determined by equation (36) or (37), and the sequence number v can be determined by equation (38):

[0114]

[0115] Alternatively, if equation (35) is used (expressed as option #2), the SRS sequence can be the same on the 4 OFDM symbols corresponding to the TD-OCC, the time unit of the sequence hopping is equal to or greater than the length of the TD-OCC, and the two SRS resources (or two SRS ports) with partially overlapping bandwidths can be orthogonal. If the time domain unit of the sequence hopping is equal to X, the group number u is determined by equations (39) and (40).

[0116]

[0117] For option #2, the group number u can still be determined by equation (37), where l' is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol of the SRS, except for the case of each time unit where the SRS sequence hops, in which case l' is the relative index of the first SRS OFDM symbol in each time domain unit where the SRS sequence hops. For example, if one SRS resource occupies OFDM {4,5,6,7} in one time slot and x is equal to 2, then l0=4, and for OFDM {4,5}, l' is the same and equal to 4, and for OFDM {6,7}, l' is the same and equal to 6. That is, for all OFDM symbols in one time domain unit of the SRS sequence, l' is the same and equal to the value of l' corresponding to the first OFDM symbol of one time domain unit where the SRS sequence hops.

[0118] Continuing with option #2, the sequence number v can be determined by equation (41). Alternatively, the sequence number v can still be determined by equation (38), and l' is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol of the SRS, except for the case of each time unit, in which case l' is the relative index of the first SRS OFDM symbol in one time domain unit of the sequence hop.

[0119] In some embodiments, if TD-OCC is used for ports on one SRS resource, the time domain unit of sequence hopping may be 1, that is, option #1 may be used. If TD-OCC is used for ports on different SRS resources with partial bandwidth, option #2 may be used.

[0120] In some embodiments, if the length of the TD-OCC is less than or equal to the number of SRS ports multiplexed by different TD-OCCs in one SRS resource, option #1 may be used, otherwise, option #2 may be used.

[0121] In some embodiments, the TD-OCC may be used first on an SRS port in one SRS resource, and then on an SRS port on a different SRS resource. In this document, the time unit of the sequence hopping may be signaled. For example, a candidate for the time unit of the sequence hopping may be {1, the length of the TD-OCC}. Considering different MU (Multiuser) UEs, the length of the TD-OCC may be different for different time periods of the SRS resource. In this document, the TD-OCC length may be dynamically transmitted to the UE.

[0122] In some embodiments, the comb, CS and / or TD-OCC parameters for SRS ports in one SRS resource may be constrained by a relationship. For example, one of the comb, CS and TD-OCC parameters for SRS ports in one SRS resource may be determined by the other two parameters. Alternatively, one of the comb, CS and TD-OCC parameters for SRS ports in one SRS resource may be determined by one of the other two parameters.

[0123] In some embodiments, comb and CS mapping is based on TD-OCC allocation. For example, Can be replaced by is the number of SRS ports with the same TD-OCC index in the same comb in one SRS resource. The same TD-OCC index corresponds to one TD-OCC. For example, SRS ports {0-1} use TD-OCC[1,1], and SRS ports {2-3} use TD-OCC[1,-1], and four SRS ports are in the same comb, and The CS for SRS port i is determined by one of the following equations:

[0124]

[0125] In this article, is the number of SRS ports corresponding to one TD-OCC index, and the comb shape is determined by the following equation:

[0126]

[0127] Example Embodiments Using Downlink Control Information (DCI)

[0128] In some embodiments, the sequence of SRS resources is determined by the parameter OK, this parameter Indicated by downlink control information (DCI). In some embodiments, DCI uses 10 bits or more to directly indicate In another embodiment, the DCI uses less than 10 bits to indicate In one example, RRC / MAC-CE signaling can be used to indicate In another example, the DCI notifies the candidate values ​​for an SRS resource set. Optionally, an SRS resource set is associated with the triggering state of the SRS request field. The RRC may not include a triggering state for the SRS resources in the SRS resource set. The relative index is exist The index into the list of candidate values.

[0129] In some embodiments, the group number u of the sequence of SRS resources is determined by the following equation:

[0130]

[0131] In this paper, c(x) is the initial value The xth bit in the generated universal pseudo-random sequence, where It can be determined by DCI signaling.

[0132] In some embodiments, the sequence number v of the sequence of SRS resources is determined by the following equation:

[0133]

[0134] In this paper, c(x) is the initial value The xth bit in the generated universal pseudo-random sequence, where It can be determined by DCI signaling.

[0135] In some embodiments, the CS of the sequence of SRS resources is determined to use the initial value c init Generates a universal pseudo-random sequence, where c init is based on Of which, Determined by DCI signaling.

[0136] Example embodiment using comb parameters

[0137] In some embodiments, the sequence parameters of the SRS resource are determined by the comb index. For example, different SRS ports in different comb indexes may correspond to different TD-OCCs or different CS parameters.

[0138] In some embodiments, the comb index of an SRS port jumps at the level of the third type of time unit. In one example, the comb index remains the same for all OFDM symbols in a third type of time unit. In another example, the comb index jumps between two third types of time units. In this article, a third type of time unit includes one or more OFDM symbols.

[0139] In some embodiments, the comb index of an SRS port jumps at the level of a frequency unit. In one example, the comb index remains the same for all physical resource blocks (PRBs) in a frequency unit. In another example, the comb index jumps between two frequency units. In this article, a frequency unit includes one or more PRBs.

[0140] Example Embodiment Using Partially Overlapping SRS Resources

[0141] In some embodiments, if an SRS resource partially overlaps with PUCCH, PUSCH or another SRS resource in one or more OFDM symbols, the SRS resource will be discarded on one or more OFDM symbols according to specific priority rules. In these scenarios, the TD-OCC and the length of the TD-OCC can be determined based on the number of remaining OFDM symbols for the SRS.

[0142] For example, one SRS resource may be configured with four OFDM symbols in one time slot and with a TD-OCC of length 4. If one SRS resource overlaps with PUCCH, PUSCH, or another SRS resource in one of the four OFDM symbols, the one SRS resource is transmitted only on the remaining three OFDM symbols, and the TD-OCC of the one SRS resource is replaced with a TD-OCC of length 3. In this article, three TD-OCCs of length 3 correspond to three TD-OCCs of length 4. If a TD-OCC of length 4 does not have a corresponding TD-OCC of length 3, the one SRS resource is not transmitted on four OFDM symbols. That is, the entire SRS resource is not transmitted and is discarded.

[0143] In some embodiments, if the SRS port of one SRS resource is multiplexed by TD-OCC, the TD-OCC of the one SRS resource and the length of the TD-OCC are determined by the remaining OFDM symbols of the SRS. Alternatively, the multiplexing type of the SRS port of the one SRS resource may be changed.

[0144] Example Embodiment Using Beamforming

[0145] In some embodiments, and if the SRS port is configured for antenna switching, the SRS is transmitted using the precoding matrix W. In these scenarios, the SRS port is a beamformed SRS port. Example methods for transmitting using a beamformed SRS port include:

[0146] Method 1:Each SRS port corresponds to a beam, and there is a one-to-one mapping between N SRS ports and N beams. In this paper, the transmission vector is given as:

[0147]

[0148] This can be applied to the xT-yR case, where x=y, and where x is the number of transmit SRS ports in one OFDM symbol on the network node side, and y is the total number of receive antennas on the wireless device (eg, UE) side.

[0149] Method 2: In this scenario, Y SRS ports correspond to L layers, so that each layer is sent by Y SRS ports, and each of the Y SRS ports corresponds to L layers. In this article, the signal model used is:

[0150]

[0151] This can be applied to the xT-yR case, where x can be smaller than y. i Corresponding to the i-th layer, i-th beamforming SRS port, and i-th beam.

[0152] In some embodiments, for each beamformed SRS port s i , the transmission may be repeated y / x times. In one example, x=2, y=8, L=4, where L layers are repeatedly transmitted 4 times and are transmitted by each of the 8 antenna ports on the UE side. L layers are repeatedly transmitted by each of the y antenna ports on the UE side. Each of the y antenna ports corresponds to L layers on the UE side. For each transmission in the y / x transmission times, L layers are repeatedly transmitted in y / x transmission times, and each transmission corresponds to a subset of the y antenna ports on the UE side. The UE transmits L layers using x antenna ports at each transmission opportunity. In another example, at different transmission times, L layers are transmitted by different x antenna ports on the UE side. In yet another example, one SRS resource is configured by y / x transmission opportunities, and different transmission opportunities correspond to different x antenna ports on the UE side, where each of the y / x transmission opportunities corresponds to L layers, L beams, or L SRS ports.

[0153] Alternatively, in another example, an SRS resource set is configured with y / x SRS resources, wherein different SRS resources in the y / x SRS resources correspond to different x antenna ports on the UE side. Each of the y / x SRS resources corresponds to L layers, L beams, or L SRS ports. Each SRS resource includes x SRS ports or x antenna ports on the UE side. The x antenna ports on the UE side correspond to L reference signal ports, which may be indicated by L layers, L beams, or L SRS ports. In these examples, x, y, and L are integers, wherein L is equal to or less than y, x is less than y, and / or x is equal to or less than y. The y antenna ports on the UE side correspond to y repeated transmissions of L layers, L beams, or L SRS ports.

[0154] Different transmission opportunities among the y / x transmission opportunities (or different SRS resources among the y / x SRS resources) correspond to the same L layers, but they may correspond to different reference signals. For example, each transmission opportunity among the y / x transmission opportunities (or each SRS resource among the y / x SRS resources) corresponds to the same L layers and different reference signals. As shown in Table 1, reference signals {11, 21, 31, 41} correspond to the same layer 1. The gNB obtains the channels corresponding to layer 1 by adding the channels corresponding to the reference signals {11, 21, 31, 41}. Reference signals {12, 22, 32, 42} correspond to the same layer 2. The gNB obtains the channels corresponding to layer 2 by adding the channels corresponding to the reference signals {12, 22, 32, 42}, and so on.

[0155] In some embodiments, different transmission opportunities among the y / x transmission opportunities (or different SRS resources among the y / x SRS resources) correspond to the same L layers and the same reference signal. Here, the same reference signal corresponds to the same set of configuration parameters, while different reference signals correspond to different sets of configuration parameters. Each transmission opportunity among the y / x transmission opportunities (or each SRS resource among the y / x SRS resources) corresponds to one of the L layers, L beams, or L SRS ports. Each of the L layers, L beams, or L SRS ports may correspond to the same power control factor or a different power control factor. If they correspond to different power control factors, the gNB may notify the relative power ratios (rates) between different layers, beams, or SRS ports. Alternatively, the gNB may report the relative power ratios between different layers, beams, or SRS ports to the gNB.

[0156] Table 1

[0157]

[0158] In some embodiments, the precoding matrix W i It is based on multiple channel state information (CSI) reference signal (RS) resources from multiple coherent joint transmission (CJT) transmission-reception points (TRP). In one example, the precoding vector {w0,w1,…,w i ,…} i The SRS resources with ID i for antenna switching are sequentially provided to the same port ID. In this article, precoding is determined according to the associated CSI-RS for CJT.

[0159] In some embodiments, determining W i Whether it is subband or wideband is based on the physical resource block group (PRG) size of the SRS, which is notified to the UE and / or reported to the network node (e.g., gNB).

[0160] In some embodiments, and if more than one SRS set is used for antenna switching in the xT-yR case where x is less than y, the more than one SRS set shares the same multiple CSI-RS resources when configuring the beams of the SRS ports.

[0161] Example methods and implementations of the disclosed technology

[0162] Figure 1 A flow chart of an example method 100 for wireless communication according to the disclosed technology is shown. The method 100 includes: at operation 110, a wireless device sends a sounding reference signal (SRS) to a network node. In some embodiments, the sounding reference signal is determined by a first parameter and a cyclic shift parameter, and the value of the first parameter jumps at the level of a first type of time unit, and the value of the cyclic shift parameter jumps at the level of a second type of time unit.

[0163] Figure 2 A flow chart of an example method 200 for wireless communication according to the disclosed technology is shown. The method 200 includes: at operation 210, receiving, by a network node, a sounding reference signal (SRS) from a wireless device.

[0164] The method 200 includes: performing further communication with the wireless device based on the SRS at operation 220. In some embodiments, the sounding reference signal is determined by a first parameter and a cyclic shift parameter, and the value of the first parameter jumps at a level of a first type of time unit, and the value of the cyclic shift parameter jumps at a level of a second type of time unit.

[0165] Figure 3 A flow chart of an example method 300 for wireless communication according to the disclosed technology is shown. The method 300 includes: at operation 310, a network node sends a configuration for a sounding reference signal (SRS) resource to a wireless device.

[0166] The method 300 includes receiving an SRS in an SRS resource at operation 320. In some embodiments, the configuration includes information associated with a time domain orthogonal cover code (TD-OCC) or a multiplexing type for a plurality of SRS ports in the SRS resource.

[0167] Figure 4 A flow chart of an example method 400 for wireless communication according to the disclosed technology is shown. The method 400 includes: at operation 410, receiving, by a wireless device, a configuration for a sounding reference signal (SRS) resource from a network node.

[0168] The method 400 includes transmitting the SRS in the SRS resource at operation 420. In some embodiments, the configuration includes information associated with one or more time domain orthogonal cover codes (TD-OCC) or multiplexing types for a plurality of SRS ports in the SRS resource.

[0169] The disclosed technology particularly provides the following technical solutions:

[0170] 1. A method of wireless communication, comprising:

[0171] The wireless device sends a sounding reference signal (SRS) to the network node.

[0172] The sounding reference signal is determined by a first parameter and a cyclic shift parameter, wherein the value of the first parameter jumps at a level of a first type of time unit, and the value of the cyclic shift parameter jumps at a level of a second type of time unit.

[0173] 2. A method of wireless communication, comprising:

[0174] receiving, by the network node, a sounding reference signal (SRS) from a wireless device; and

[0175] performing further communication with the wireless device based on the SRS,

[0176] The sounding reference signal is determined by a first parameter and a cyclic shift parameter, wherein the value of the first parameter jumps at a level of a first type of time unit, and the value of the cyclic shift parameter jumps at a level of a second type of time unit.

[0177] 3. The method according to solution 1 or 2, wherein the first type of time unit includes a first number of orthogonal frequency division multiplexing (OFDM) symbols, and the second type of time unit includes a second number of OFDM symbols.

[0178] 4. The method according to solution 1 or 2, wherein the first type of time unit or the second type of time unit is a time domain unit associated with a frequency domain hopping of the SRS.

[0179] 5. The method according to solution 1 or 2, wherein the first type of time unit or the second type of time unit is determined by the length of a time domain orthogonal cover code (TD-OCC) of the SRS.

[0180] 6. The method according to solution 1 or 2, wherein the first type of time unit and the second type of time unit include the same number of OFDM symbols.

[0181] 7. The method according to solution 1 or 2, wherein the first type of time unit and the second type of time unit are the same type of time unit.

[0182] 8. A method according to any one of solutions 1 to 7, wherein, in response to the value of a first parameter of a first SRS being equal to the value of a first parameter of a second SRS at a given time, a value of a cyclic shift (CS) parameter used for the first SRS is different from a value of a CS parameter used for the second SRS, or wherein, in response to the value of a CS parameter of the first SRS being equal to the value of a CS parameter of the second SRS at a given time, a value of the first parameter used for the first SRS is different from a value of the first parameter used for the second SRS.

[0183] 9. The method of solution 8, wherein the first SRS is sent by a first wireless device and the second SRS is sent by a second wireless device.

[0184] 10. The method of solution 8, wherein the first SRS and the second SRS are transmitted by the wireless device.

[0185] 11. A method according to any one of solutions 1 to 7, wherein the value of the first parameter jumps between two adjacent first type time units, and wherein the value of the first parameter remains unchanged on one or more OFDM symbols within each first type time unit.

[0186] 12. A method according to any one of solutions 1 to 7, wherein the value of the cyclic shift parameter jumps between two adjacent second-type time units, and wherein the value of the cyclic shift parameter remains unchanged on one or more OFDM symbols within each second-type time unit.

[0187] 13. A method according to any one of solutions 1 to 7, wherein the value of the first parameter is based on a first index of the first type of time unit, and the value of the cyclic shift parameter is based on a second index of the second type of time unit.

[0188] 14. The method according to any one of solutions 1 to 7, wherein the hopping pattern for the first parameter is based on an initialization parameter (c init ), and wherein the hopping pattern for the CS parameter is based on a second pseudo-random sequence generated by a second value of the initialization parameter.

[0189] 15. The method according to solution 14, wherein the first value of the initialization parameter is determined as:

[0190] or

[0191]

[0192] in, is an integer value configured for the SRS resource of the SRS, and wherein C is the total number of group numbers or the total number of candidate values ​​of the first parameter.

[0193] 16. The method according to solution 15, wherein, in response to the first parameter including the group number of the SRS, the second value of the initialization parameter is determined to be one of the following:

[0194]

[0195] or

[0196]

[0197] in, is the first integer value configured for the SRS resource of the SRS, C is the total number of the group numbers, and F is the maximum number of integers or candidate values ​​of the CS parameter Δ is the integer offset, f gh is an integer value associated with the hopping pattern for the first parameter, k and k0 belong to {0, 1, ..., F-1}, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l′.

[0198] 17. The method according to solution 15, wherein the second value of the initialization parameter is determined as one of the following:

[0199]

[0200] or

[0201]

[0202] in, is a first integer value configured for the SRS resource of the SRS, is a second integer value configured for the SRS resource of the SRS, C is the total number of group numbers of the first parameter or the total number of candidate values, and F is an integer or the maximum number of candidate values ​​of the CS parameter Δ is an integer, f gh is an integer value associated with the hopping pattern for the first parameter, k and k0 belong to {0, 1, ..., F-1} and are configured by the network node, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l′ or by the index of the second type of time unit.

[0203] 18. The method of solution 17, wherein Δ is (i) based on a cell radio network temporary identifier (C-RNTI) of the wireless device, (ii) configured by the network node, or (iii) configured by another network node.

[0204] 19. The method of solution 17, wherein Δ is based on a physical cell index (PCI) associated with an SRS resource of the SRS.

[0205] 20. The method of solution 17, wherein Δ is configured at one of the following levels: per wireless device, per cell, per physical cell index (PCI), or per SRS resource set including one or more SRS resources.

[0206] 21. The method according to solution 14, wherein, in the case where the first parameter includes a sequence number of the SRS, the second value of the initialization parameter is determined as one of the following:

[0207]

[0208] or

[0209]

[0210] Where F and P are integers, ν is the sequence number, and is an integer configured for the SRS resource of the SRS.

[0211] 22. The method according to solution 21, wherein P is greater than or equal to The maximum available value.

[0212] 23. A method according to any one of solutions 1 to 7, wherein the first parameter is based on an initialization parameter (c init ), wherein the CS parameter is based on a first bit set of a pseudo-random sequence generated by a value of , wherein the CS parameter is based on a second bit set of the pseudo-random sequence.

[0213] 24. The method according to solution 23, wherein the hopping pattern for the first parameter is composed of f gh,or,v Determined, where f gh,or,v is generated as one of:

[0214]

[0215] or

[0216]

[0217] Among them, the hopping pattern for the CS parameter is composed of f cs Determine, where f cs is generated as one of:

[0218]

[0219] or

[0220]

[0221] Where K, E, and F are integers, C is the total number of groups, It includes the SRS and 15×2 μ The subcarrier frequency in kHz corresponds to the index of the time slot, is the number of OFDM symbols in the slot, and

[0222] wherein, in response to one time unit including one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, and l′ is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol including the SRS in the time slot,

[0223] wherein, in response to the one time unit including more than one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, l′ is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol, except for the case of OFDM symbols in one time unit, in which case l′ is the relative index of the first SRS OFDM symbol in the one time unit, and

[0224] Among them, for f gh,or,v , the one time unit is a time unit of the first type, and for f cs , the one time unit is a time unit of the second type, l firsttimeunit is the index of the time unit of the first type including the SRS, and l secondtimeunti is an index of the second type of time unit including the SRS.

[0225] 25. The method according to solution 23, wherein the hopping pattern for the first parameter is composed of f gh,or,v Determined, where f gh,or,v is generated as one of:

[0226]

[0227] or

[0228]

[0229] Among them, the hopping pattern for the CS parameter is composed of f cs Determine, where f cs is generated as one of:

[0230]

[0231] or

[0232] and

[0233] Where K, E, and F are integers, C is the total number of groups, It includes the SRS and 15×2 μ The subcarrier frequency in kHz corresponds to the index of the time slot, is the number of OFDM symbols in the time slot if a time unit of the second type comprises one OFDM symbol,

[0234] wherein, in response to one time unit including one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, and l′ is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol including the SRS in the time slot,

[0235] wherein, in response to the one time unit including more than one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, l′ is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol, except for the case of OFDM in one time unit, in which case l′ is the relative index of the first SRS OFDM symbol in the one time unit, and

[0236] Among them, for f gh,or,v , the one time unit is a time unit of the first type, and for f cs , the one time unit is a time unit of the second type, l firsttimeunit is the index of the time unit of the first type including the SRS, and l secondtimeunti is an index of the second type of time unit including the SRS.

[0237] 26. The method according to solution 24 or 25, wherein the integer K is greater than or equal to And wherein B is the total number of the first parameters or B is equal to C.

[0238] 27. The method of solution 26, wherein in response to the first parameter being the group number of the SRS and C being equal to 30, K being equal to 8.

[0239] 28. The method of solution 26, wherein in response to the first parameter being the sequence number of the SRS and C being equal to 1, K is equal to 1.

[0240] 29. The method according to solution 24 or 25, wherein (i) E is determined by F, or (ii) E is greater than

[0241] 30. A method according to any one of solutions 1 to 7, wherein the CS parameter is based on the first parameter.

[0242] 31. A method according to any one of solutions 1 to 7, wherein the first parameter is based on the CS parameter.

[0243] 32. The method according to solution 30 or 31, wherein the hopping pattern of the CS parameter is based on the hopping pattern for the first parameter.

[0244] 33. The method of solution 30 or 31, wherein the hopping pattern of the first parameter is based on the hopping pattern for the CS parameter.

[0245] 34. A method according to solution 30 or 31, wherein the CS parameter in the second type of time unit with a second index is based on the first parameter in the first type of time unit with a first index, or for the SRS on the OFDM symbol, the CS parameter of the OFDM symbol is based on the first parameter in the first type of time unit with a first index.

[0246] 35. The method according to solution 30 or 31, wherein, in response to the first parameter including the group number of the SRS, the CS parameter of the SRS Determined to be one of the following:

[0247]

[0248] or

[0249]

[0250] in, is an integer configured for the SRS resource of the SRS, f gh is an integer that jumps for the group number of the SRS at the level of the first type of time domain unit, C is the total number of groups, and F is an integer, k and k0 belong to {0,1,…,F–1} and are configured by the network node, and k(l) belongs to {0,1,…,F–1} and is determined by the OFDM symbol index l=l0+l′ or by the index of the second time unit.

[0251] 36. The method according to solution 30 or 31, wherein, in response to the first parameter including the sequence number of the SRS, the index of the CS parameter of the SRS Determined to be one of the following:

[0252]

[0253] or

[0254]

[0255] Wherein, P is an integer, ν is the sequence number, is an integer configured for the SRS resource of the SRS, is the maximum number of cyclic shifts in a comb, and F is an integer or the total number of candidate values ​​of the CS parameter

[0256] 37. The method according to solution 30 or 31, wherein the CS parameter is determined by f cs Determine, where f cs Determined by:

[0257]

[0258] or

[0259] and

[0260] Where E is an integer, It includes the SRS and 15×2 μ The subcarrier frequency in kHz corresponds to the index of the time slot, is the number of OFDM symbols in the time slot when a time unit of the second type includes one OFDM symbol, and c(x) is the x-th bit of the pseudo-random sequence,

[0261] wherein, in response to a time unit of the second type comprising an OFDM symbol, l0 is an index of a starting OFDM symbol in the time slot comprising the SRS, and l′ is a relative index of an SRS OFDM symbol relative to the starting OFDM symbol in the time slot comprising the SRS,

[0262] wherein, in response to a time unit of the second type comprising more than one OFDM symbol, l0 is the index of the starting OFDM symbol in the time slot comprising the SRS, l′ is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol, except for the case of OFDM in one time unit, in which case l′ is the relative index of the first SRS OFDM symbol in the one time unit, and wherein l secondtimeunti is an index of the second type of time unit including the SRS.

[0263] 38. The method according to solution 30 or 37, wherein the CS parameter is Determine, among which, Determined by:

[0264]

[0265] or

[0266]

[0267] 39. A method according to any one of solutions 1 to 38, wherein for a One SRS resource for each SRS port, for antenna port The cyclic shift α i is given as:

[0268]

[0269] or

[0270]

[0271] Among them, Δ cs ∈{0,1,...,F-1} is configured by the network node.

[0272] 40. A method according to any one of solutions 1 to 39, wherein the wireless device is configured to receive signaling including selection information between modes, wherein the mode includes at least two of the following: only the group number jumps at the level of the first type of time unit, only the sequence jumps at the level of the first type of time unit, the group number jumps at the level of the first type of time unit and the CS parameter jumps at the level of the second type of time unit, the sequence number jumps at the level of the first type of time unit and the CS parameter jumps at the level of the second type of time unit, or the group number, the sequence number and the CS parameter remain unchanged across each time unit.

[0273] 41. A method according to any one of solutions 1 to 40, wherein the first parameter includes a sequence number ν or a group number.

[0274] 42. A method of wireless communication, comprising:

[0275] Sending, by a network node, a configuration for a sounding reference signal (SRS) resource to a wireless device; and

[0276] receiving an SRS in the SRS resource,

[0277] The configuration includes information associated with a time domain orthogonal cover code (TD-OCC) or a multiplexing type for a plurality of SRS ports in the SRS resource.

[0278] 43. A method of wireless communication, comprising:

[0279] Receiving, by a wireless device, a configuration for a sounding reference signal (SRS) resource from a network node; and

[0280] sending an SRS in the SRS resource,

[0281] The configuration includes information associated with one or more time domain orthogonal cover codes (TD-OCCs) or multiplexing types for a plurality of SRS ports in the SRS resource.

[0282] 44. The method of solution 42 or 43, wherein the length of the TD-OCC is signaled by the network node to the wireless device.

[0283] 45. A method according to solution 42 or 43, wherein the length of the TD-OCC is equal to a repetition factor, and wherein the SRS in the SRS resource is on the same frequency resource on all OFDM symbols whose number is the repetition factor.

[0284] 46. ​​A method according to solution 42 or 43, wherein a repetition factor is equal to a multiple of the length of the TD-OCC, and wherein the SRS in the SRS resource is on the same frequency resource on all OFDM symbols whose number is the repetition factor.

[0285] 47. A method according to solution 42 or 43, wherein, in response to the SRS resources being discarded on one or more OFDM symbols, at least one of the TD-OCC, the length of the TD-OCC, or the multiplexing type is determined by the number of remaining OFDM symbols excluding the discarded OFDM symbols.

[0286] 48. A method according to solution 42 or 43, wherein, in response to more than one TD-OCC being used for the SRS port of the SRS resource, a sequence parameter of the SRS hopping pattern is independent of the length of the TD-OCC at the level of a time unit, and wherein the sequence parameter includes a group number of the SRS, a sequence number of the SRS, or a CS parameter of the SRS.

[0287] 49. A method according to solution 42 or 43, wherein, in response to (i) more than one TD-OCC is used for SRS ports on different SRS resources including the SRS resource or (ii) only one TD-OCC is used for an SRS port in the SRS resource, a time unit of a hopping pattern of a sequence parameter of the SRS is greater than or equal to the length of the TD-OCC.

[0288] 50. A method according to solution 42 or 43, wherein, in response to the length of the TD-OCC being less than or equal to the number of SRS ports multiplexed by different TD-OCCs in the SRS resource, the time unit of the hopping pattern of the sequence parameter of the SRS is independent of the TD-OCC.

[0289] 51. A method according to solution 42 or 43, wherein, in response to the length of the TD-OCC being greater than the number of SRS ports multiplexed by different TD-OCCs in the SRS resources, a time unit of a hopping pattern of a sequence parameter of the SRS is greater than or equal to the length of the TD-OCC.

[0290] 52. A method according to any one of solutions 48 to 51, wherein the time unit of the hopping pattern of the sequence parameters of the SRS is determined by signaling from the network node to the wireless device, and wherein the signaling includes at least one of the following: radio resource control (RRC) signaling, media access control (MAC) control element (CE) signaling, or downlink control information (DCI).

[0291] 53. A method according to solution 52, wherein the signaling includes: (i) information associated with whether the time unit of the hopping pattern of the sequence parameters of the SRS is determined by the length of the TD-OCC; or (ii) the number of OFDM symbols included in the time unit.

[0292] 54. The method according to solution 52, wherein the time unit includes one OFDM symbol or more than one OFDM symbol, so that the number of the more than one OFDM symbols is the length of the TD-OCC.

[0293] 55. A method according to any one of solutions 48 to 51, wherein the hopping pattern of the sequence parameter of the SRS is based on an integer of the SRS resource. , and wherein the integer is indicated by downlink control information (DCI).

[0294] 56. The method of solution 55, wherein the DCI uses ten or more bits to indicate the absolute value of the integer.

[0295] 57. The method of solution 55, wherein the DCI uses less than ten bits to indicate the relative index of the integer in the list of candidate values ​​for the integer.

[0296] 58. A method according to solution 42 or 43, wherein the multiplexing type for the multiple SRS ports includes at least one of the following: (i) the multiple SRS ports are multiplexed by using different cyclic shift (CS) parameters, the multiple SRS ports are multiplexed by using different TD-OCCs, or the multiple SRS ports are multiplexed by using different combs.

[0297] 59. A method according to solution 42 or 43, wherein determining a cyclic shift (CS) parameter of an SRS port in the SRS resource, a TD-OCC parameter of an SRS port in the SRS resource, or a comb parameter of an SRS port in the SRS resource is based on at least one of the other two parameters.

[0298] 60. The method according to solution 59, wherein the cyclic shift parameter for the i-th SRS port in the SRS resource is Identified as:

[0299] or

[0300] and

[0301] Where F is an integer or is the index of the CS parameter of the SRS, is the maximum number of cyclic shifts in a comb, is the number of antenna ports of the wireless device, p i is the ith antenna port, is the number of SRS ports in the SRS resource corresponding to one TD-OCC index, and is the number of SRS ports with the same TD-OCC index in the same comb in the SRS resource.

[0302] 61. The method according to solution 59, wherein the i-th SRS port (p i ) Identified as:

[0303]

[0304] in, is the number of SRS ports corresponding to one TD-OCC index, is the index of the CS parameter of the SRS, K TC is the transmission comb number, and is the comb offset.

[0305] 62. A method according to solution 42 or 43, wherein, in response to the SRS resource overlapping with another signal or another channel on M OFDM symbols out of N OFDM symbols of the SRS resource, the SRS resource is discarded on the N OFDM symbols or the M OFDM symbols based on at least one of the following: whether there is a TD-OCC of length M1 corresponding to the TD-OCC of length N1 of the SRS or the index of the TD-OCC of the SRS, wherein M is less than N, M1 is less than M, and N1 is less than N, wherein M, N, N1 and M1 are integers, and wherein M is a multiple of M1, and N is a multiple of N1.

[0306] 63. An apparatus for wireless communication, comprising a processor configured to implement the method according to one or more of solutions 1 to 62.

[0307] 64. A non-transitory computer-readable program storage medium having a code stored thereon, which, when executed by a processor, causes the processor to implement the method according to one or more of solutions 1 to 62.

[0308] Figure 5 An exemplary block diagram of a hardware platform 500 is shown, which may be part of a network device (e.g., a base station) or a communication device (e.g., a user equipment (UE)). The hardware platform 500 includes at least one processor 510 and a memory 505 having instructions stored thereon. The instructions, when executed by the processor 510, configure the hardware platform 500 to execute in Figures 1 to 4 The operations described in the various embodiments described in and in this patent document. Transmitter 515 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user device. Receiver 520 receives information or data transmitted or sent by another device. For example, a user device can receive a message from a network device.

[0309] The embodiments discussed above may be applied to wireless communications. Figure 6An example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 620 and one or more user equipment (UE) 611, 612, and 613 is shown. In some embodiments, the UE accesses the BS (e.g., the network) using a communication link to the network (sometimes referred to as an uplink direction, as depicted by dashed arrows 631, 632, 633), so that subsequent communication from the BS to the UE is then achieved (e.g., shown in the direction from the network to the UE, sometimes referred to as a downlink direction, represented by arrows 641, 642, 643). In some embodiments, the BS sends information to the UE (sometimes referred to as a downlink direction, as depicted by arrows 641, 642, 643), so that subsequent communication from the UE to the BS is then achieved (e.g., shown in the direction from the UE to the BS, sometimes referred to as an uplink direction, represented by dashed arrows 631, 632, 633). The UE can be, for example, a smart phone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and the like.

[0310] In this document, the term "exemplary" is used to mean "an example of," and is not intended to imply an ideal or preferred embodiment unless otherwise specified.

[0311] Some embodiments of the embodiments described herein are described in the general context of methods or processes, which can be implemented in one embodiment by a computer program product implemented in a computer-readable medium, and the computer program product includes computer executable instructions, such as program codes, executed by a computer in a network environment. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact discs (CD), digital versatile discs (DVD), etc. Therefore, computer-readable media may include non-transient storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Computer or processor executable instructions, associated data structures, and program modules represent examples of program codes for executing the steps of the methods disclosed herein. A specific sequence of such executable instructions or associated data structures represents an example of corresponding actions for implementing the functions described in such steps or processes.

[0312] Some of the disclosed embodiments may be implemented as a device or module using hardware circuits, software, or a combination thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components, for example, integrated as a part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application specific integrated circuits (ASIC) and / or field programmable gate arrays (FPGA) devices. Some embodiments may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor with such an architecture: an architecture optimized for the operational needs of digital signal processing associated with the disclosed functions of the present application. Similarly, various components or subcomponents within each module may be implemented with software, hardware, or firmware. Any of the connection methods and media known in the art (including but not limited to communications on the Internet, wired, or wireless networks using appropriate protocols) may be used to provide connections between modules and / or components within the module.

[0313] Although this document contains many details, these details should not be understood as limitations on the scope of the claimed invention or the scope that may be claimed, but rather as descriptions of features specific to a particular embodiment. Certain features described in the context of different embodiments in this document may also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment may also be implemented in multiple embodiments, respectively, or in multiple embodiments in any suitable sub-combination. In addition, although features may be described above as working in certain combinations, and even initially claimed as such, in some cases, one or more features from the claimed combination may be deleted from the combination, and the claimed combination may involve a sub-combination or a variation of a sub-combination. Similarly, although operations are depicted in a particular order in the accompanying drawings, this should not be understood as requiring that the operations be performed in the particular order shown or in sequence, or requiring that all operations shown be performed to achieve the desired result.

[0314] Only a few implementations and examples are described, and other implementations, enhancements, and variations are possible based on what is described and illustrated in this disclosure.

Claims

1. A method of wireless communication, comprising: The wireless device sends a sounding reference signal (SRS) to the network node. The sounding reference signal is determined by a first parameter and a cyclic shift parameter, wherein the value of the first parameter jumps at a level of a first type of time unit, and the value of the cyclic shift parameter jumps at a level of a second type of time unit.

2. A method of wireless communication, comprising: receiving, by a network node, a sounding reference signal (SRS) from a wireless device; as well as performing further communication with the wireless device based on the SRS, The sounding reference signal is determined by a first parameter and a cyclic shift parameter, wherein the value of the first parameter jumps at a level of a first type of time unit, and the value of the cyclic shift parameter jumps at a level of a second type of time unit.

3. The method according to claim 1 or 2, wherein: The first type of time unit includes a first number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the second type of time unit includes a second number of OFDM symbols.

4. The method according to claim 1 or 2, wherein: The first type of time unit or the second type of time unit is a time domain unit associated with a frequency domain hopping of the SRS.

5. The method according to claim 1 or 2, wherein: The first type of time unit or the second type of time unit is determined by a length of a time domain orthogonal cover code (TD-OCC) of the SRS.

6. The method according to claim 1 or 2, wherein: The time unit of the first type and the time unit of the second type include the same number of OFDM symbols.

7. The method according to claim 1 or 2, wherein: The first type of time unit and the second type of time unit are the same type of time unit.

8. The method according to any one of claims 1 to 7, wherein: In response to a value of a first parameter of a first SRS being equal to a value of a first parameter of a second SRS at a given time, a value of a cyclic shift (CS) parameter for the first SRS is different from a value of a CS parameter for the second SRS, or wherein, in response to a value of a CS parameter of the first SRS being equal to a value of a CS parameter of the second SRS at a given time, the value of the first parameter for the first SRS is different from a value of the first parameter for the second SRS.

9. The method according to claim 8, wherein: The first SRS is transmitted by a first wireless device, and the second SRS is transmitted by a second wireless device.

10. The method according to claim 8, wherein: The first SRS and the second SRS are transmitted by the wireless device.

11. The method according to any one of claims 1 to 7, wherein: The value of the first parameter changes between two adjacent first-type time units, and the value of the first parameter remains unchanged over one or more OFDM symbols within each first-type time unit.

12. The method according to any one of claims 1 to 7, wherein: The value of the cyclic shift parameter jumps between two adjacent second-type time units, and the value of the cyclic shift parameter remains unchanged on one or more OFDM symbols within each second-type time unit.

13. The method according to any one of claims 1 to 7, wherein: The value of the first parameter is based on a first index of the time unit of the first type, and the value of the cyclic shift parameter is based on a second index of the time unit of the second type.

14. The method according to any one of claims 1 to 7, wherein: The hopping pattern for the first parameter is based on the initialization parameter (c init ), and wherein the hopping pattern for the CS parameter is based on a second pseudo-random sequence generated by a second value of the initialization parameter.

15. The method according to claim 14, wherein: The first value of the initialization parameter is determined as: or in, is an integer value configured for the SRS resource of the SRS, and wherein C is the total number of group numbers or the total number of candidate values ​​of the first parameter.

16. The method according to claim 15, wherein: In response to the first parameter including the group number of the SRS, the second value of the initialization parameter is determined to be one of the following: or in, is the first integer value configured for the SRS resource of the SRS, C is the total number of the group numbers, and F is the maximum number of integers or candidate values ​​of the CS parameter Δ is the integer offset, f gh is an integer value associated with the hopping pattern for the first parameter, k and k0 belong to {0, 1, ..., F-1}, and belongs to {0, 1, ..., F-1} and is indexed by OFDM symbol l=l0+l ′ to be sure.

17. The method according to claim 15, wherein: The second value of the initialization parameter is determined to be one of: or in, is a first integer value configured for the SRS resource of the SRS, is a second integer value configured for the SRS resource of the SRS, C is the total number of group numbers of the first parameter or the total number of candidate values, and F is an integer or the maximum number of candidate values ​​of the CS parameter Δ is an integer, f gh is an integer value associated with the hopping pattern for the first parameter, k and k0 belong to {0, 1, ..., F-1} and are configured by the network node, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l ′ Determined by or by the index of the time unit of the second type.

18. The method according to claim 17, wherein: Δ is (i) based on a cell radio network temporary identifier (C-RNTI) of the wireless device, (ii) configured by the network node, or (iii) configured by another network node.

19. The method according to claim 17, wherein: Δ is based on a physical cell index (PCI) associated with an SRS resource of the SRS.

20. The method according to claim 17, wherein: Δ is configured at one of the following levels: per wireless device, per cell, per physical cell index (PCI), or per SRS resource set including one or more SRS resources.

21. The method according to claim 14, wherein: In the case where the first parameter includes a sequence number of the SRS, the second value of the initialization parameter is determined as one of the following: or Where F and P are integers, ν is the sequence number, and is an integer configured for the SRS resource of the SRS.

22. The method according to claim 21, wherein: P is greater than or equal to The maximum available value.

23. The method according to any one of claims 1 to 7, wherein: The first parameter is based on the initialization parameter (c init ), wherein the CS parameter is based on a first bit set of a pseudo-random sequence generated by a value of , wherein the CS parameter is based on a second bit set of the pseudo-random sequence.

24. The method according to claim 23, wherein: The hopping pattern for the first parameter is given by f gh,or,v Determined, where f gh,or,v is generated as one of: or Among them, the hopping pattern for the CS parameter is composed of f cs Determine, where f cs is generated as one of: or Where K, E, and F are integers, C is the total number of groups, It includes the SRS and 15×2 μ The subcarrier frequency in kHz corresponds to the index of the time slot, is the number of OFDM symbols in the slot, and In which, in response to a time unit including an OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, and l ′ is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol in the slot including the SRS, In which, in response to the one time unit including more than one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, l ′ is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol, except for the case of OFDM symbols in one time unit, in which case l ′ is the relative index of the first SRS OFDM symbol in the one time unit, and Among them, for f gh,or,v , the one time unit is a time unit of the first type, and for f cs , the one time unit is a time unit of the second type, l firsttimeunit is the index of the time unit of the first type including the SRS, and l secondtimeunit is an index of the second type of time unit including the SRS.

25. The method according to claim 23, wherein: The hopping pattern for the first parameter is given by f gh,or,v Determined, where f gh,or,v is generated as one of: or Among them, the hopping pattern for the CS parameter is composed of f cs Determine, where f cs is generated as one of: or and Where K, E, and F are integers, C is the total number of groups, It includes the SRS and 15×2 μ The subcarrier frequency in kHz corresponds to the index of the time slot, is the number of OFDM symbols in the time slot if a time unit of the second type comprises one OFDM symbol, In which, in response to a time unit including an OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, and l ′ is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol in the slot including the SRS, In which, in response to the one time unit including more than one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, l ′ is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol, except for the case of OFDM in one time unit, in which case l ′ is the relative index of the first SRS OFDM symbol in the one time unit, and Among them, for f gh,or,v , the one time unit is a time unit of the first type, and for f cs , the one time unit is a time unit of the second type, l firsttimeunit is the index of the time unit of the first type including the SRS, and l secondtimeunit is an index of the second type of time unit including the SRS.

26. The method according to claim 24 or 25, wherein: The integer K is greater than or equal to And wherein B is the total number of the first parameters or B is equal to C.

27. The method according to claim 26, wherein: In response to the first parameter being the group number of the SRS and C being equal to 30, K being equal to 8.

28. The method according to claim 26, wherein: In response to the first parameter being the sequence number of the SRS and C being equal to 1, K being equal to 1.

29. The method according to claim 24 or 25, wherein: (i) E is determined by F, or (ii) E is greater than 30. The method according to any one of claims 1 to 7, wherein: The CS parameter is based on the first parameter.

31. The method according to any one of claims 1 to 7, wherein: The first parameter is based on the CS parameter.

32. The method according to claim 30 or 31, wherein: The hopping pattern of the CS parameter is based on the hopping pattern for the first parameter.

33. The method according to claim 30 or 31, wherein: The hopping pattern of the first parameter is based on the hopping pattern for the CS parameter.

34. The method according to claim 30 or 31, wherein: The CS parameter in the second type of time unit with a second index is based on the first parameter in the first type of time unit with a first index, or for the SRS on the OFDM symbol, the CS parameter of the OFDM symbol is based on the first parameter in the first type of time unit with a first index.

35. The method according to claim 30 or 31, wherein: In response to the first parameter including the group number of the SRS, the CS parameter of the SRS Determined to be one of the following: or in, is an integer configured for the SRS resource of the SRS, f gh is an integer that the group number for the SRS jumps at the level of the first type of time domain unit, C is the total number of groups, and F is an integer, k and k0 belong to {0, 1, ..., F-1} and are configured by the network node, and k(l) belongs to {0, 1, ..., F-1} and is determined by the OFDM symbol index l=l0+l ′ Determined by or by the index of the second time unit.

36. The method according to claim 30 or 31, wherein: In response to the first parameter including the sequence number of the SRS, the index of the CS parameter of the SRS Determined to be one of the following: or Wherein, P is an integer, ν is the sequence number, is an integer configured for the SRS resource of the SRS, is the maximum number of cyclic shifts in a comb, and F is an integer or the total number of candidate values ​​of the CS parameter 37. The method according to claim 30 or 31, wherein: The CS parameter is given by f cs Determine, where f cs Determined by: or and Where E is an integer, It includes the SRS and 15×2 μ The subcarrier frequency in kHz corresponds to the index of the time slot, is the number of OFDM symbols in the time slot when a time unit of the second type includes one OFDM symbol, and c(x) is the x-th bit of the pseudo-random sequence, In which, in response to a time unit of the second type including an OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, and l ′ is the relative index of the SRS OFDM symbol relative to the starting OFDM symbol in the slot including the SRS, In which, in response to a time unit of the second type including more than one OFDM symbol, l0 is the index of the starting OFDM symbol including the SRS in the time slot, l ′ is the relative index of the SRS OFDM symbol with respect to the starting OFDM symbol, except for the case of OFDM in one time unit, in which case l ′ is the relative index of the first SRS OFDM symbol in the one time unit, and wherein, l secondtimeunit is an index of the second type of time unit including the SRS.

38. The method according to claim 30 or 37, wherein: The CS parameters are given by Determine, among which, Determined by: or 39. The method according to any one of claims 1 to 38, wherein: For the SRS having One SRS resource for each SRS port, for antenna port The cyclic shift α i is given as: or Among them, Δ cs ∈{0,1,...,F-1} is configured by the network node.

40. The method according to any one of claims 1 to 39, wherein: The wireless device is configured to receive signaling including selection information between modes, wherein the modes include at least two of the following: only the group number hops at the level of the first type of time unit, only the sequence hops at the level of the first type of time unit, the group number hops at the level of the first type of time unit and the CS parameter hops at the level of the second type of time unit, the sequence number hops at the level of the first type of time unit and the CS parameter hops at the level of the second type of time unit, or the group number, the sequence number and the CS parameter remain unchanged across each time unit.

41. The method according to any one of claims 1 to 40, wherein: The first parameter includes a sequence number v or a group number.

42. A method of wireless communication, comprising: Sending, by a network node, a configuration for a sounding reference signal (SRS) resource to a wireless device; as well as receiving an SRS in the SRS resource, The configuration includes information associated with a time domain orthogonal cover code (TD-OCC) or a multiplexing type for a plurality of SRS ports in the SRS resource.

43. A method of wireless communication, comprising: Receiving, by a wireless device, a configuration for a sounding reference signal (SRS) resource from a network node; as well as sending an SRS in the SRS resource, The configuration includes information associated with one or more time domain orthogonal cover codes (TD-OCCs) or multiplexing types for a plurality of SRS ports in the SRS resource.

44. The method according to claim 42 or 43, wherein: The length of the TD-OCC is signaled by the network node to the wireless device.

45. The method according to claim 42 or 43, wherein: The length of the TD-OCC is equal to a repetition factor, and wherein the SRS in the SRS resource is located on the same frequency resource over all OFDM symbols having a number equal to the repetition factor.

46. ​​The method of claim 42 or 43, wherein: A repetition factor is equal to a multiple of the length of the TD-OCC, and wherein the SRS in the SRS resource is located on the same frequency resource on all OFDM symbols having a number equal to the repetition factor.

47. The method of claim 42 or 43, wherein: In response to the SRS resources being dropped on one or more OFDM symbols, at least one of the TD-OCC, the length of the TD-OCC, or the multiplexing type is determined by the number of remaining OFDM symbols excluding the dropped OFDM symbols.

48. The method of claim 42 or 43, wherein: In response to more than one TD-OCC being used for the SRS port of the SRS resource, a sequence parameter of the SRS hopping pattern is independent of the length of the TD-OCC at the level of a time unit, and wherein the sequence parameter includes a group number of the SRS, a sequence number of the SRS, or a CS parameter of the SRS.

49. The method of claim 42 or 43, wherein: In response to (i) more than one TD-OCC being used for SRS ports on different SRS resources including the SRS resource or (ii) only one TD-OCC being used for an SRS port in the SRS resource, a time unit of a hopping pattern of a sequence parameter of the SRS is greater than or equal to a length of the TD-OCC.

50. The method of claim 42 or 43, wherein: In response to the length of the TD-OCC being less than or equal to the number of SRS ports multiplexed by different TD-OCCs in the SRS resource, a time unit of a hopping pattern of a sequence parameter of the SRS is independent of the TD-OCC.

51. The method of claim 42 or 43, wherein: In response to the length of the TD-OCC being greater than the number of SRS ports multiplexed by different TD-OCCs in the SRS resource, a time unit of a hopping pattern of a sequence parameter of the SRS is greater than or equal to the length of the TD-OCC.

52. The method according to any one of claims 48 to 51, wherein: The time unit of the hopping pattern of the sequence parameter of the SRS is determined by signaling from the network node to the wireless device, and wherein the signaling includes at least one of the following: radio resource control (RRC) signaling, media access control (MAC) control element (CE) signaling, or downlink control information (DCI).

53. The method of claim 52, wherein: The signaling includes: (i) information associated with whether a time unit of a hopping pattern of a sequence parameter of the SRS is determined by the length of the TD-OCC; or (ii) the number of OFDM symbols included in the time unit.

54. The method of claim 52, wherein: The time unit includes one OFDM symbol or more than one OFDM symbol, so that the number of the more than one OFDM symbols is the length of the TD-OCC.

55. The method according to any one of claims 48 to 51, wherein: The hopping pattern of the SRS sequence parameter is based on the integer of the SRS resource. , and wherein the integer is indicated by downlink control information (DCI).

56. The method of claim 55, wherein: The DCI indicates the absolute value of the integer using ten or more bits.

57. The method of claim 55, wherein: The DCI uses less than ten bits to indicate a relative index of the integer in a list of candidate values ​​for the integer.

58. The method of claim 42 or 43, wherein: The multiplexing type for the multiple SRS ports includes at least one of the following: (i) the multiple SRS ports are multiplexed by using different cyclic shift (CS) parameters, the multiple SRS ports are multiplexed by using different TD-OCCs, or the multiple SRS ports are multiplexed by using different combs.

59. The method of claim 42 or 43, wherein: Determining a cyclic shift (CS) parameter of an SRS port in the SRS resource, a TD-OCC parameter of an SRS port in the SRS resource, or a comb parameter of an SRS port in the SRS resource is based on at least one of the other two parameters.

60. The method of claim 59, wherein: The cyclic shift parameter for the i-th SRS port in the SRS resource Identified as: or and Where F is an integer or is the index of the CS parameter of the SRS, is the maximum number of cyclic shifts in a comb, is the number of antenna ports of the wireless device, p i is the ith antenna port, is the number of SRS ports in the SRS resource corresponding to one TD-OCC index, and is the number of SRS ports with the same TD-OCC index in the same comb in the SRS resource.

61. The method of claim 59, wherein: The i-th SRS port (p i ) Determined as: in, is the number of SRS ports corresponding to one TD-OCC index, is the index of the CS parameter of the SRS, K TC is the transmission comb number, and is the comb offset.

62. The method of claim 42 or 43, wherein: In response to the SRS resource overlapping with another signal or another channel on M OFDM symbols out of N OFDM symbols of the SRS resource, the SRS resource is discarded on the N OFDM symbols or the M OFDM symbols based on at least one of the following: whether there is a TD-OCC of length M1 corresponding to the TD-OCC of length N1 of the SRS or the index of the TD-OCC of the SRS, wherein M is less than N, M1 is less than M, and N1 is less than N, wherein M, N, N1 and M1 are integers, and wherein M is a multiple of M1, and N is a multiple of N1.

63. An apparatus for wireless communication, comprising a processor configured to implement the method according to one or more of claims 1 to 62.

64. A non-transitory computer-readable program storage medium having codes stored thereon, which, when executed by a processor, cause the processor to implement the method according to one or more of claims 1 to 62.

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