Transmission method, device and system of reference signal

Abstract

Embodiments of the present application provide a method, device and system for transmitting a reference signal. The method comprises: determining, by a first device, at least one reference signal generation sequence corresponding to at least one frequency domain resource group used for transmitting a reference signal in a symbol carrying the reference signal, wherein one frequency domain resource group corresponds to one reference signal generation sequence; generating, by the first device, the reference signal according to the at least one reference signal generation sequence, and mapping the reference signal to a time-frequency resource with time domain being the symbol and frequency domain being the at least one frequency domain resource group.

Description

[0001] This application claims priority to Chinese Patent Application No. 201610218110.4, filed on April 8, 2016, entitled "Method for Transmitting Reference Signals, User Equipment, Base Station and System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more specifically, to methods, devices, and systems for transmitting reference signals. Background Technology

[0003] Fifth Generation Network (5 th 5G (5G Generation), also known as NR (New Radio / RAT), is defined by the International Telecommunication Union (ITU) in its expectations and requirements for 5G as encompassing three main service categories: Enhanced Mobile Broadband (eMBB), Ultra-reliable and Low Latency Communications (URLLc), and Massive Machine-Type Communications (mMTC). URLLc services, in particular, require extremely low latency, with a minimum latency of only 1ms. Due to the urgency of latency, URLLc services require immediate resource allocation upon data arrival, with virtually no waiting time. Furthermore, URLLc services also demand high reliability, typically requiring an ultra-high reliability of 99.999%.

[0004] In one prior art of this application, the Uplink Multi-User Multiple-Input Multiple-Output (UL MU-MIMO) system in Long Term Evolution (LTE) allows the definition of mutually orthogonal demodulation reference signals (DMRS) on the same time-frequency resources using Code Division Multiplexing (CDM), thereby enabling the multiplexing of reference signal (RS) resources between paired UL MU-MIMO user equipment (UE). If paired UL MU-MIMO UEs occupy different bandwidths and their bandwidths partially overlap, different UEs will use reference signal base sequences of different lengths. In this case, simply using cyclic shifting of the base sequences cannot guarantee the orthogonality between the RSs of different UEs. Similar problems exist in Downlink Multi-User Multiple-Input Multiple-Output (DL MU-MIMO) systems where paired UEs occupy different bandwidths and their bandwidths partially overlap, as well as in scenarios involving orthogonal / quasi-orthogonal pilot designs between different cells. How to ensure the orthogonality between RSs of different UEs under different bandwidth scenarios so as to realize the reuse of RS resources for multiple users is the technical problem to be solved by this application. Summary of the Invention

[0005] This application provides a method, device, and system for transmitting reference signals, which can realize the multiplexing of multi-user RS ​​resources.

[0006] In a first aspect, a method for transmitting a reference signal is provided. The method includes: a first user equipment determining at least one base sequence corresponding to at least one frequency domain resource group on a symbol carrying the reference signal for transmitting the reference signal, wherein one frequency domain resource group corresponds to one base sequence, and each frequency domain resource group includes a plurality of subcarriers with the same number of subcarriers; the user equipment generating the reference signal according to the at least one base sequence and mapping it to time-frequency resources where the time domain is the symbol and the frequency domain is the at least one frequency domain resource group.

[0007] In conjunction with the first aspect, in the first possible implementation, the specific implementation is as follows: if both the first user equipment and the second user equipment generate reference signal sequences in the third frequency domain resource group, then the cyclic shifts used by the first user equipment and the second user equipment to generate reference signal sequences based on the third base sequence are different; wherein, the third frequency domain resource group is one of the at least one frequency domain resource group, and the third base sequence is the base sequence corresponding to the third frequency domain resource group.

[0008] In conjunction with the first aspect or the first possible implementation of the first aspect, in the second possible implementation, the first user equipment determines at least one base sequence corresponding to at least one frequency domain resource group used for transmitting the reference signal on the symbol carrying the reference signal. Specifically, the first user equipment determines a first base sequence corresponding to a first frequency domain resource group and a second base sequence corresponding to a second frequency domain resource group. The first user equipment generates the reference signal based on the at least one base sequence and maps it to time-frequency resources where the time domain is the symbol transmitting the reference signal and the frequency domain is the at least one frequency domain resource group. Specifically, the first user equipment generates a first reference signal sequence of the reference signal based on the first base sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the first frequency domain resource group. The first user equipment generates a second reference signal sequence of the reference signal based on the second base sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the second frequency domain resource group.

[0009] In conjunction with the second possible implementation of the first aspect, in the third possible implementation, the first user equipment uses the same cyclic shift to generate the first reference signal sequence and the second reference signal sequence.

[0010] In conjunction with the third possible implementation of the first aspect, the fourth possible implementation is specifically implemented as follows: the cyclic shift is notified to the first user equipment by the base station; or, the cyclic shift is determined by the first user equipment according to configuration parameters, the configuration parameters including one or more of the user equipment-specific configuration parameters, time-domain-specific configuration parameters, cell-specific configuration parameters and frequency-domain-specific configuration parameters of the first user equipment, and the configuration parameters cannot include only cell-specific configuration parameters or frequency-domain-specific configuration parameters.

[0011] In conjunction with the above-mentioned possible implementations of the first aspect, the fourth possible implementation is specifically implemented as follows: the correspondence between the frequency domain resource group and the base sequence is pre-agreed upon by the base station and the first user equipment; or, the correspondence between the frequency domain resource group and the base sequence is sent by the base station to the first user equipment.

[0012] Secondly, a user equipment is proposed for performing the methods in the first aspect or any possible implementation of the first aspect.

[0013] Specifically, the user equipment may include a unit for performing the method in the first aspect or any possible implementation of the first aspect.

[0014] Thirdly, another user device is proposed, comprising a memory for storing instructions, a processor for executing the instructions stored in the memory, and the execution of the instructions stored in the memory causes the processor to perform the methods of the first aspect or any possible implementation thereof.

[0015] Fourthly, a computer-readable storage medium is provided for storing a computer program including instructions for performing the methods of the first aspect or any possible implementation thereof.

[0016] Fifthly, another method for transmitting reference signals is proposed, which includes: a user equipment receiving downlink control signaling sent by a base station, the downlink control signaling instructing the user equipment to transmit a frequency domain resource group of the reference signal on a symbol carrying the reference signal, each frequency domain resource group including multiple subcarriers with the same number of subcarriers; the user equipment generating a reference signal sequence and mapping it to time-frequency resources where the time domain is the symbol and the frequency domain is the frequency domain resource group.

[0017] In the sixth aspect, a user equipment is proposed for performing the methods in the fifth aspect or any possible implementation of the fifth aspect.

[0018] Specifically, the user equipment may include a unit for performing the methods in the fifth aspect or any possible implementation of the fifth aspect.

[0019] In a seventh aspect, another user device is proposed, comprising a memory for storing instructions, a processor for executing the instructions stored in the memory, and the execution of the instructions stored in the memory causes the processor to perform the methods in the fifth aspect or any possible implementation thereof.

[0020] Eighthly, a computer-readable storage medium is provided for storing a computer program including instructions for performing the methods of the fifth aspect or any possible implementation thereof.

[0021] In a ninth aspect, another method for transmitting a reference signal is proposed, the method comprising: a base station sending downlink control information to a user equipment, the downlink control signaling being used to instruct the user equipment to transmit a frequency domain resource group of the reference signal on a symbol carrying the reference signal; and the base station receiving the reference signal transmitted by the user equipment on the frequency domain resource group.

[0022] In the tenth aspect, a base station is proposed for performing the methods in the ninth aspect or any possible implementation of the ninth aspect.

[0023] Specifically, the base station may include units for performing the methods in the ninth aspect or any possible implementation of the ninth aspect.

[0024] Eleventhly, another base station is proposed, comprising a memory for storing instructions, a processor for executing the instructions stored in the memory, and the execution of the instructions stored in the memory causes the processor to perform the methods in the ninth aspect or any possible implementation thereof.

[0025] In a twelfth aspect, a computer-readable storage medium is provided for storing a computer program including instructions for performing the methods in the ninth aspect or any possible implementation thereof.

[0026] In a thirteenth aspect, a method for transmitting a reference signal is provided, the method comprising: a first device determining at least one reference signal generation sequence corresponding to at least one frequency domain resource group on a symbol carrying the reference signal for transmitting the reference signal, wherein one frequency domain resource group corresponds to one reference signal generation sequence; the first device generating the reference signal according to the at least one reference signal generation sequence and mapping it to time-frequency resources in the time domain of the symbol and in the frequency domain of the at least one frequency domain resource group.

[0027] In conjunction with aspect thirteen, in the first possible implementation, the specific implementation is as follows: when both the first device and the second device map reference signals on time-frequency resources where the symbol is in the time domain and the third frequency domain resource group is in the frequency domain, the cyclic shift or orthogonal codes used by the first device and the second device to generate reference signals according to the third reference signal generation sequence are different; wherein, the third frequency domain resource group is one of the at least one frequency domain resource group, and the third reference signal generation sequence is the reference signal generation sequence corresponding to the third frequency domain resource group.

[0028] In conjunction with the first possible implementation of aspect thirteen, the second possible implementation is specifically as follows: the cyclic shift or orthogonal code is determined by the first device based on a first parameter set, the parameters in the first parameter set including one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, network-side configuration parameters, and combined parameters, the combined parameters being a combination of multiple parameters among user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters; or, when the first device is a user equipment, the cyclic shift or orthogonal code is notified to the first device by the network-side device connected to the first device.

[0029] In conjunction with aspect thirteen, in the third possible implementation, when both the first device and the second device map reference signals on time-frequency resources where the symbol is in the time domain and the third frequency domain resource group is in the frequency domain, the reference signal generation sequence of the first device in the third frequency domain resource group is different from the reference signal generation sequence of the second device in the third frequency domain resource group.

[0030] In conjunction with the third possible implementation of aspect thirteen, in the fourth possible implementation, the first device determines at least one reference signal generation sequence corresponding to at least one frequency domain resource group used for transmitting the reference signal on the symbol carrying the reference signal. Specifically, the first device determines a first reference signal generation sequence corresponding to a first frequency domain resource group and a second reference signal generation sequence corresponding to a second frequency domain resource group. The first device generates the reference signal based on the at least one reference signal generation sequence and maps it to time-frequency resources where the time domain is the symbol transmitting the reference signal and the frequency domain is the at least one frequency domain resource group. Specifically, the first device generates a first reference signal sequence based on the first reference signal generation sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the first frequency domain resource group; the first device generates a second reference signal sequence based on the second reference signal generation sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the second frequency domain resource group.

[0031] In conjunction with the above-mentioned possible implementations of aspect thirteen, in the fifth possible implementation, the specific implementation is as follows: the reference signal generation sequence is determined by the first device based on a second parameter set, wherein the parameters in the second parameter set include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, network-side configuration parameters, and combined parameters, and the combined parameters are a combination of multiple parameters among user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters; or, the correspondence between the frequency domain resource group and the reference signal generation sequence is pre-agreed; or, when the first device is a user equipment, the correspondence between the frequency domain resource group and the reference signal generation sequence is sent to the first device by the network-side device connected to the first device.

[0032] In the fourteenth aspect, an apparatus is proposed for performing the method in the thirteenth aspect or any possible implementation of the thirteenth aspect.

[0033] Specifically, the device may include a unit for performing the method in the thirteenth aspect or any possible implementation of the thirteenth aspect.

[0034] In the fifteenth aspect, another device is proposed, comprising a memory for storing instructions, a processor for executing the instructions stored in the memory, and the execution of the instructions stored in the memory causes the processor to perform the methods in the thirteenth aspect or any possible implementation thereof.

[0035] In a sixteenth aspect, a computer-readable storage medium is provided for storing a computer program including instructions for performing the methods of the thirteenth aspect or any possible implementation thereof.

[0036] In the seventeenth aspect, a communication system is proposed, which includes a base station and a user equipment, wherein the user equipment is a user equipment in the second aspect or any possible implementation thereof, or a user equipment in the third aspect or any possible implementation thereof.

[0037] In the eighteenth aspect, a communication system is proposed, which includes a device that is a device in the fourteenth aspect or any possible implementation of the fourteenth aspect, or a device in the fifteenth aspect or any possible implementation of the fifteenth aspect.

[0038] Based on the above technical solutions, on the one hand, by determining different base sequences according to different frequency domain resource groups, and then generating reference sequences based on the base sequences and mapping them to the corresponding time and frequency resources, it is possible to realize the orthogonality of RS for different UEs under different bandwidths, thereby improving the reuse efficiency of RS resources and realizing the reuse of multi-user RS ​​resources; on the other hand, by allocating different frequency domain resource groups to different user equipment to send reference signals, it is possible to improve the reuse efficiency of RS resources and realize the reuse of multi-user RS ​​resources. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of a reference signal transmission method according to an embodiment of this application.

[0041] Figure 2 This is a schematic diagram of uplink multi-user RS ​​resource multiplexing in an embodiment of this application.

[0042] Figure 3 This is a schematic diagram of a reference signal transmission method according to an embodiment of this application.

[0043] Figure 4 This is a schematic diagram of frequency domain resources and frequency domain combs in an embodiment of this application.

[0044] Figure 5 This is a schematic diagram of another transmission method of the reference signal in an embodiment of this application.

[0045] Figure 6 This is a schematic diagram of the physical device according to an embodiment of this application.

[0046] Figure 7 This is a schematic diagram of another method for transmitting reference signals according to an embodiment of this application.

[0047] Figure 8 This is a schematic diagram of another RS ​​resource reuse for uplink multi-users in an embodiment of this application. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), etc.

[0050] A terminal, also known as user equipment (UE), user, etc., can communicate with one or more core networks via a radio access network (e.g., radio access network, RAN). It can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket, handheld, computer-embedded, or vehicle-mounted mobile device. They exchange voice and / or data with the radio access network.

[0051] To facilitate understanding of the embodiments of this application, several elements that will be introduced in the description of the embodiments of this application will be introduced first.

[0052] Air interface resources are defined as the time and frequency domain resources of the air interface, typically represented by resource elements (REs), resource blocks (RBs), symbols, subcarriers, and transmission time intervals (TTIs). Air interface resources can be partitioned in both the frequency and time domains; the smallest granularity for frequency domain partitioning is the subcarrier, and the smallest granularity for time domain partitioning is the symbol.

[0053] An RE represents the resource of one subcarrier within one symbol time, and each RE can carry certain information. N symbols constitute a TTI. The M subcarriers in a TTI together constitute an RB.

[0054] To ensure the low latency and high reliability requirements of URLLC services, URLLC uplink services can flexibly utilize MBB uplink physical resources within a short TTI through preemption or reservation. Here, "short TTI" refers to a shorter subframe. Currently, an LTE subframe is 1ms long, while a short TTI subframe is even shorter, such as 0.125ms or other lengths. In such a short TTI, due to the reduced number of time-domain symbols, very few symbols are available for uplink data demodulation RS transmission, possibly only one. Therefore, in multi-user RS ​​scenarios, the time-frequency resources occupied by two user equipments may overlap. Furthermore, scenarios involving orthogonal / quasi-orthogonal pilot designs between different cells and UL / DL MU-MIMO paired UEs occupying different bandwidths (with partial bandwidth overlap) also face similar technical challenges. How to achieve multi-user RS ​​resource reuse is the technical problem this application aims to solve.

[0055] Figure 1 This is a schematic diagram of a reference signal transmission method according to an embodiment of this application. Figure 1The method is executed by the user equipment.

[0056] 101. The first user equipment determines at least one base sequence corresponding to at least one frequency domain resource group on the symbol carrying the reference signal for transmitting the reference signal.

[0057] In this context, a frequency domain resource group corresponds to a base sequence, and each frequency domain resource group includes multiple subcarriers with the same number of subcarriers.

[0058] It should be understood that in the embodiments of this application, a frequency domain resource group may include multiple frequency domain subcarriers, and each frequency domain resource group contains the same number of subcarriers.

[0059] It should be understood that in the embodiments of this application, the symbols used to carry the reference signal may include one or more symbols.

[0060] It should be understood that a base sequence is not the same as a type of base sequence; the former refers to the number of base sequences, while the latter refers to the type of base sequence.

[0061] The first user equipment transmits a reference signal in at least one frequency domain resource group. Each frequency domain resource group transmits a reference signal sequence for that reference signal. The reference signal is composed of at least one reference signal sequence transmitted on at least one frequency domain resource group. Each reference signal sequence is generated from a base sequence. The first user equipment needs to determine that the number of base sequences is the same as the number of frequency domain resource groups. One frequency domain resource group corresponds to one type of base sequence. Different frequency domain resource groups can use the same or different base sequences. The total number of types of the at least one base sequence is less than or equal to the number of the at least one base sequence. It should be understood that one frequency domain resource group corresponds to one type of base sequence, and the relationship between the types of frequency domain resource groups and base sequences can be one-to-one or many-to-one. For example, an index of a frequency domain resource group corresponds to an index of a base sequence, and the index of the frequency domain resource group can be associated with the index of the base sequence. A concrete example is that frequency domain resource group indices 1, 2, and 3 correspond to base sequence index 1, frequency domain resource group index 4 corresponds to base sequence index 2, and so on. That is, different frequency domain resource groups can use the same or different base sequences. The total number of types of at least one base sequence corresponding to at least one frequency domain resource group used to transmit the reference signal is less than or equal to the number of at least one base sequence.

[0062] Optionally, the correspondence between the frequency domain resource group and the base sequence is pre-agreed upon by the base station and the user equipment.

[0063] Alternatively, the correspondence between the frequency domain resource group and the base sequence is sent by the base station to the user equipment.

[0064] 102. The first user equipment generates the reference signal based on the at least one base sequence and maps it to time-frequency resources with the symbol in the time domain and the at least one frequency domain resource group in the frequency domain.

[0065] It should be understood that the first user equipment generates a reference signal based on the base sequence, each base sequence generates a reference signal sequence, and all generated reference signal sequences constitute the reference signal.

[0066] It should be understood that after the first user equipment generates a reference signal, it can map the reference signal onto the time-frequency resources that transmit the reference signal, wherein the time domain of the time-frequency resources is the symbol (the symbol carrying the reference signal), and the frequency domain is the at least one group of frequency domain resources.

[0067] It should be understood that once the first user equipment maps the reference signal to the time-frequency resources, it can send the reference signal.

[0068] In this embodiment, different base sequences are determined based on different frequency domain resource groups, reference signals are generated based on the base sequences, and mapped onto the corresponding time-frequency resources. This provides the possibility of achieving RS orthogonality for different UEs under different bandwidths, thereby improving the reuse efficiency of RS resources and realizing the reuse of RS resources for multiple users.

[0069] Optionally, if the first user equipment and the second user equipment multiplex the third frequency domain resource group on the symbol, then the cyclic shifts used by the user equipment and the second user equipment to generate the reference signal sequence according to the third base sequence are different; wherein, the third frequency domain resource group is one of the at least one frequency domain resource group, and the third base sequence is the base sequence corresponding to the third frequency domain resource group.

[0070] In this embodiment of the application, by configuring different cyclic shifts for the base sequences of different UEs on the same frequency domain resource group, the RS of UEs with different bandwidths on the same frequency domain resource group can be orthogonal, thereby improving the reuse efficiency of RS resources and realizing the reuse of multi-user RS ​​resources.

[0071] Further, step 101 is specifically implemented as follows: the first user equipment determines the first base sequence corresponding to the first frequency domain resource group and determines the second base sequence corresponding to the second frequency domain resource group; at this time, step 102 is specifically implemented as follows: the first user equipment generates a first reference signal sequence of the reference signal according to the first base sequence and maps it to the time-frequency resources of the symbol in the time domain and the first frequency domain resource group in the frequency domain; the first user equipment generates a second reference signal sequence of the reference signal according to the second base sequence and maps it to the time-frequency resources of the symbol in the time domain and the second frequency domain resource group in the frequency domain.

[0072] Optionally, the first user equipment uses different cyclic shifts to generate the first reference signal sequence and the second reference signal sequence.

[0073] Alternatively, the first user equipment may use the same cyclic shift to generate the first reference signal sequence and the second reference signal sequence.

[0074] Furthermore, when the cyclic shift used by the first user equipment to generate the first reference signal sequence and the second reference signal sequence is the same, the cyclic shift is notified to the user equipment by the base station; or, the cyclic shift is determined by the user equipment according to configuration parameters, which include one or more of UE-specific configuration parameters, time-domain-specific configuration parameters, cell-specific configuration parameters, and frequency-domain-specific configuration parameters, and the configuration parameters cannot include only cell-specific configuration parameters or frequency-domain-specific configuration parameters.

[0075] The methods of the embodiments of this application will be further described below with reference to specific examples.

[0076] Figure 2 This is a schematic diagram of uplink multi-user RS ​​resource multiplexing according to an embodiment of this application. For example... Figure 1 As shown, this RB includes four frequency domain resource groups (N to N+3) in the frequency domain and seven symbols (0 to 6) in the time domain. Specifically, UE1 transmits data on time-frequency resources with symbol 2 in the time domain and frequency domain resource groups N to N+3; UE2 transmits data on time-frequency resources with symbols 4 and 5 in the time domain and frequency domain resource groups N and N+1 in the frequency domain; and UE3 transmits data on time-frequency resources with symbols 4 and 5 in the time domain and frequency domain resource groups N+2 and N+3 in the frequency domain. UE1, UE2, and UE3 all transmit reference signals on symbol 3 (time-frequency resources shown in gray squares). Specifically, UE1 transmits reference signals on time-frequency resources with symbol 3 in the time domain and frequency resource groups N to N+3 in the frequency domain; UE2 transmits reference signals on time-frequency resources with symbol 3 in the time domain and frequency resource groups N and N+1 in the frequency domain; and UE3 transmits reference signals on time-frequency resources with symbol 3 in the time domain and frequency resource groups N+2 and N+3 in the frequency domain.

[0077] In the embodiments of this application, a reference signal may include a reference signal sequence generated based on a base sequence, or it may include multiple reference signal sequences generated based on multiple base sequences.

[0078] In this embodiment, one frequency domain resource group corresponds to one base sequence, and multiple different frequency domain resource groups may correspond to the same base sequence. Each frequency domain resource group may include one or more subcarriers. The correspondence between frequency domain resource groups and base sequences can be, for example, related by the index of the frequency domain resource group and the index of the base sequence, etc. For example, frequency domain resource group indices 1, 2, and 3 correspond to base sequence index 1, frequency domain resource group index 5 corresponds to base sequence index 2, and so on. Let's assume... Figure 2 The mid-frequency domain resource groups N, N+1, N+2 and N+3 correspond to the base sequences N', N'+1, N'+2 and N'+3, respectively.

[0079] Furthermore, it should be understood that the correspondence between frequency domain resource groups and base sequences can be specified by the protocol, or agreed upon in advance by the base station and user equipment, or notified to the user equipment by the base station through configuration messages. This application embodiment does not impose any restrictions on this.

[0080] For a single UE, the UE uses the base sequence corresponding to the frequency domain resource group to generate a reference signal sequence for the reference signal on the frequency domain resource group it occupies, and maps it to the time and frequency resources corresponding to the frequency domain resource group.

[0081] Taking UE1 as an example, the UE generates reference signal sequences N', N'+1, N'+2 and N'+3 according to the base sequences N, N+1, N+2 and N+3 respectively, and maps them to the time-frequency resources with symbol 3 in the time domain and frequency-domain resource groups N, N+1, N+2 and N+3 in the frequency domain respectively.

[0082] It should be understood that the cyclic shift used by the user equipment (UE) to generate the reference signal sequence based on the base sequence can be notified to the UE by the base station or determined by the UE based on configuration parameters. This configuration reference may include one or more of the following: UE-specific configuration parameters, time-domain-specific configuration parameters, cell-specific configuration parameters, and frequency-domain-specific configuration parameters. It should be noted that these configuration parameters cannot include only cell-specific configuration parameters or frequency-domain-specific configuration parameters.

[0083] Preferably, the same cyclic shift is used by the same user equipment to generate the reference signal sequence based on the base sequence. When the same cyclic shift is used by the same user equipment, the base station may notify the user equipment of only one cyclic shift, or the user equipment may determine a cyclic shift based on configuration parameters.

[0084] Furthermore, within the same frequency domain resource group, different user equipments use different cyclic shifts of the same base sequence to generate their respective reference signal sequences. For example, in frequency domain resource group N, UE1 and UE2 use different cyclic shifts to generate reference signal sequences using base sequence N.

[0085] Figure 2Table 1 shows a specific example of the base sequence and cyclic shift used by each UE in each frequency domain resource group:

[0086] Table 1

[0087]

[0088] As shown in Table 1, from the perspective of a UE, the RS corresponding to the transmitted data can use the same cyclic shift of multiple base sequences, which can greatly save the overhead of control signaling on the base station side.

[0089] In this embodiment of the application, by implicitly indicating the base sequence used to generate the reference signal using the time-frequency resource group, the reuse rate of RS resources can be improved, the reuse of RS resources of multiple user equipment can be realized, and the orthogonality of RS between multiple users can also be guaranteed.

[0090] Figure 3 This is a schematic diagram of a reference signal transmission method according to an embodiment of this application. Figure 3 The method is executed by the user equipment.

[0091] 301. The user equipment receives downlink control signaling sent by the base station. The downlink control signaling is used to instruct the user equipment to transmit frequency domain resource groups of the reference signal on symbols carrying the reference signal. Each frequency domain resource group includes multiple subcarriers with the same number of subcarriers.

[0092] Optionally, the downlink control signaling is a user-specific configuration UE-specific message.

[0093] 302. The user equipment generates a reference signal sequence and maps it to a time-frequency resource with the symbol in the time domain and the frequency resource group in the frequency domain.

[0094] In this embodiment, the user equipment generates a reference signal according to the frequency domain resource group allocated by the base station, which enables different user equipments to send reference signals using different frequency domain resources, thereby improving the reuse efficiency of RS resources and realizing the reuse of RS resources for multiple users.

[0095] Optionally, the downlink control signaling carries an index of the frequency domain comb. The method further includes: the user equipment determining a frequency domain resource group based on the frequency domain resources it occupies and the frequency domain comb, the frequency domain resource group comprising multiple evenly spaced comb teeth (one comb tooth represents one subcarrier). The frequency domain comb is used to extract one subcarrier every N subcarriers from a continuous segment of frequency domain resources, obtaining multiple evenly spaced comb teeth (subcarriers). For the same frequency domain resource (bandwidth), different frequency domain combs can yield different available frequency domain resources. By allocating different frequency domain combs to different users, user equipment can obtain different frequency domain resources within the same bandwidth for transmitting reference signals.

[0096] Figure 4 This is a schematic diagram of frequency domain resources and frequency domain comb teeth in an embodiment of this application. For example... Figure 4 As shown, based on frequency domain comb 1 (starting from the first subcarrier, and then taking out one subcarrier every other subcarrier), a set of frequency domain comb teeth as shown in frequency domain comb 1 can be obtained. Based on frequency domain comb 2 (starting from the second subcarrier, and then taking out one subcarrier every other subcarrier), a set of frequency domain comb teeth as shown in frequency domain comb 2 can be obtained. For the same frequency domain resource (frequency domain resource 1), different frequency domain resource groups can be obtained based on different frequency domain combs, such as... Figure 4 As shown.

[0097] Furthermore, if the user equipment and the second user equipment occupy the same frequency domain resources, then the user equipment and the second user equipment use different frequency domain combs.

[0098] If a user equipment and a second user equipment occupy different frequency domain resources, the frequency domain combs used by the user equipment and the second user equipment can be the same or different, as long as different user equipment use different frequency domain combs under overlapping frequency domain resources.

[0099] In one implementation of this application, the method further includes: a user equipment determining a base sequence based on a frequency domain comb, and generating a reference signal sequence based on the base sequence, wherein the frequency domain comb corresponds to a base sequence. The mapping relationship between the frequency domain comb and the base sequence can be many-to-one or one-to-one.

[0100] Optionally, the correspondence between the frequency domain comb and the base sequence is pre-agreed upon by the base station and the user equipment.

[0101] Alternatively, the correspondence between the frequency domain comb and the base sequence is sent by the base station to the user equipment.

[0102] In another implementation of this application, the user equipment can use the existing FDM technology to generate a reference signal sequence based on the base sequence. For specific implementation, please refer to the existing technology. This application will not be described in detail here.

[0103] Figure 5 This is a schematic diagram of a reference signal transmission method according to an embodiment of this application. Figure 5 The method is executed by the base station.

[0104] 501. The base station sends downlink control information to the user equipment. This downlink control signaling is used to instruct the user equipment to transmit the frequency domain resource group of the reference signal on the symbols carrying the reference signal. Each frequency domain resource group includes multiple subcarriers with the same number of subcarriers.

[0105] 502, The base station receives the reference signal sent by the user equipment on the frequency domain resource group.

[0106] In this embodiment of the application, the base station generates reference signals by allocating frequency domain resource groups to user equipment, which enables different user equipment to use different frequency domain resources to send reference signals, thereby improving the reuse efficiency of RS resources and realizing the reuse of multi-user RS ​​resources.

[0107] Optionally, the downlink control signaling carries an index of a frequency domain comb, which is used to determine the frequency domain resource group in conjunction with the frequency domain resources of the user equipment. The frequency domain resource group includes multiple evenly spaced comb teeth (one comb tooth is one subcarrier).

[0108] Optionally, the frequency domain comb corresponds to a base sequence, and the index of the frequency domain comb is also used by the user equipment to determine the base sequence used to generate the reference signal sequence. The relationship between the frequency domain comb and the base sequence can be many-to-one or one-to-one.

[0109] Optionally, the base station may send the downlink control signaling via UE-specific messages or the like.

[0110] This application also discloses a user equipment 1 for performing... Figure 1 The method executed by the first user equipment in the illustrated embodiment. Specifically, user equipment 1 may include methods for performing... Figure 1 The illustrated embodiment is a unit of the method executed by the first user equipment.

[0111] This application also discloses a user equipment 2 for performing... Figure 3 The method executed by the user equipment in the illustrated embodiment. Specifically, the user equipment 2 may include methods for performing... Figure 3 The illustrated embodiment is a unit of a method executed by a user device.

[0112] This application also discloses a base station 1 for performing... Figure 5 The method executed by the base station in the illustrated embodiment. Specifically, base station 1 may include methods for executing... Figure 5 The illustrated embodiment includes a unit of a method executed by the base station.

[0113] This application also proposes a user equipment 3. A schematic diagram of the physical structure of the user equipment 3 is shown below. Figure 6 The physical device 600 shown includes a processor 602, a memory 603, a transmitter 601, and a receiver 604.

[0114] The receiver 604, transmitter 601, processor 602, and memory 603 are interconnected via a bus 606. The bus 606 can be an ISA bus, PCI bus, or EISA bus, etc. This bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 The symbol is represented by only one double-headed arrow, but this does not mean that there is only one bus or one type of bus. In specific applications, transmitter 601 and receiver 604 can be coupled to antenna 605.

[0115] Memory 603 is used to store programs. Specifically, the program may include program code, which includes computer operation instructions. Memory 603 may include read-only memory and random access memory, and provides instructions and data to processor 602. Memory 603 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk drive.

[0116] The processor 602 executes the program stored in the memory 603.

[0117] Specifically, in user equipment 3, processor 602 can be used to execute Figure 1 The method of the illustrated embodiment is used to implement the first user equipment in Figure 1 The functionality of the illustrated embodiment.

[0118] Processor 602 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 602 or by instructions in software form. The processor 602 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), an Off-the-shelf Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 603. Processor 602 reads the information in memory 603 and, in conjunction with its hardware, completes the steps of the above method.

[0119] This application also proposes a user equipment 4, the physical device structure of which can be illustrated as follows: Figure 6 As shown, the entity units it contains are similar to those of user equipment 3, and will not be described in detail here.

[0120] Specifically, in user equipment 4, processor 602 can be used to execute Figure 3 The method of the illustrated embodiment is used to implement the user equipment in Figure 3 The functionality of the illustrated embodiment.

[0121] This application also proposes a base station 2, the physical device structure of which can be shown in the following figure. Figure 6 As shown, the entity units it contains are similar to those of user equipment 3, and will not be described in detail here.

[0122] Specifically, in base station 2, processor 602 can be used to execute Figure 5 The method of the illustrated embodiment is used to implement the base station in Figure 5 The functionality of the illustrated embodiment.

[0123] This application also provides a computer-readable storage medium 1 that stores one or more programs, the programs including instructions that, when executed by a portable electronic device including multiple applications, enable the portable electronic device to perform... Figure 1 The method of the illustrated embodiment.

[0124] This application also proposes a computer-readable storage medium 2 that stores one or more programs, the programs including instructions that, when executed by a portable electronic device including multiple applications, enable the portable electronic device to perform... Figure 3 The method of the illustrated embodiment.

[0125] This application also proposes a computer-readable storage medium 3 that stores one or more programs, the programs including instructions that, when executed by a portable electronic device including multiple applications, enable the portable electronic device to perform... Figure 5 The method of the illustrated embodiment.

[0126] This application also provides a communication system, including a base station and a user equipment, wherein the user equipment may be user equipment 1 or user equipment 3 in the foregoing embodiments.

[0127] Figure 7 This is a schematic diagram of a reference signal transmission method according to an embodiment of this application. Figure 7 The method is executed by the first device, which can be a user device or a network-side device, such as a base station.

[0128] 701, The first device determines at least one reference signal generation sequence corresponding to at least one frequency domain resource group on the symbol carrying the reference signal for transmitting the reference signal.

[0129] Each of the frequency domain resource groups corresponds to one of the reference signal generation sequences.

[0130] It should be understood that in the embodiments of this application, a frequency domain resource group may include multiple frequency domain subcarriers, and the number of subcarriers included in each frequency domain resource group may be the same or different.

[0131] It should be understood that in the embodiments of this application, the symbols used to carry the reference signal may include one or more symbols.

[0132] It should be understood that the reference signal generation sequence can be of different types, such as a ZC sequence, a pseudo-random sequence, or other sequences that meet the correlation requirements. This application does not impose any restrictions on this.

[0133] The first device transmits a reference signal in at least one frequency domain resource group. Each frequency domain resource group transmits a reference signal sequence for that reference signal. The reference signal is composed of at least one reference signal sequence transmitted in at least one frequency domain resource group. Each reference signal sequence is generated by a reference signal generation sequence. The first device needs to determine that the number of reference signal generation sequences is the same as the number of frequency domain resource groups. One frequency domain resource group corresponds to one reference signal generation sequence. Different frequency domain resource groups can use the same or different reference signal generation sequences. It should be understood that the correspondence between one frequency domain resource group and one reference signal generation sequence can be one-to-one or many-to-one. For example, an index of a frequency domain resource group corresponds to an index of a reference signal generation sequence. The index of the frequency domain resource group can be related to the index of the reference signal generation sequence. A concrete example is that frequency domain resource group indices 1, 2, and 3 correspond to reference signal generation sequence index 1, frequency domain resource group index 4 corresponds to base sequence index 2, and so on. That is, different frequency domain resource groups can use the same or different reference signal generation sequences.

[0134] Optionally, as an embodiment, the reference signal generation sequence is determined by the first device based on a second set of parameters. The parameters in the second set of parameters include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, network-side configuration parameters, and combined parameters. The combined parameters are a combination of multiple parameters among user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0135] Alternatively, as another embodiment, the correspondence between the frequency domain resource group and the reference signal generation sequence is predetermined. For example, the protocol may specify a mapping table between the reference signal generation sequence and the frequency domain resource locations of the frequency domain resource group, and so on.

[0136] Alternatively, as another embodiment, when the first device is a user equipment, the correspondence between the frequency domain resource group and the reference signal generation sequence is sent to the first user equipment by the network-side device.

[0137] 702, the first device generates the reference signal based on the at least one reference signal generation sequence and maps it to time-frequency resources with the symbol in the time domain and the at least one frequency domain resource group in the frequency domain.

[0138] It should be understood that the first device generates a reference signal based on the reference signal generation sequence, each reference signal generation sequence generates a reference signal sequence, and all generated reference signal sequences constitute the reference signal.

[0139] It should be understood that after the first device generates a reference signal, it can map the reference signal onto the time-frequency resource that transmits the reference signal, wherein the time domain of the time-frequency resource is the symbol (the symbol carrying the reference signal), and the frequency domain is the at least one group of frequency domain resources.

[0140] It should be understood that once the first device maps the reference signal to time-frequency resources, it can send the reference signal.

[0141] In this embodiment, different reference signal generation sequences are determined according to different frequency domain resource groups, reference signals are generated according to the reference signal generation sequences, and mapped to the corresponding time-frequency resources. This provides the possibility of realizing the orthogonality / quasi-orthogonality of RS for different devices under different bandwidths, thereby improving the reuse efficiency of RS resources and realizing the reuse of RS resources of multiple devices.

[0142] Optionally, as an embodiment, when both the first device and the second device map a reference signal in the time domain as the symbol and in the frequency domain as the third frequency domain resource group, the cyclic shift or orthogonal codes used by the first device and the second device to generate the reference signal sequence according to the third reference signal generation sequence are different; wherein, the third frequency domain resource group is one of the at least one frequency domain resource group, and the third reference signal generation sequence is the reference signal generation sequence corresponding to the third frequency domain resource group.

[0143] Optionally, in one specific implementation of this embodiment, the cyclic shift or orthogonal code is determined by the first device based on a first parameter set, wherein the parameters in the first parameter set include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0144] Alternatively, in another specific implementation of this embodiment, when the first device is a user equipment, the cyclic shift or orthogonal code is notified to the first device by the network-side device connected to the first device.

[0145] Optionally, as another embodiment, when both the first device and the second device map reference signals on time-frequency resources with the symbol in the time domain and the third frequency domain resource group in the frequency domain, the reference signal generation sequence of the first device in the third frequency domain resource group is different from the reference signal generation sequence of the second device in the third frequency domain resource group.

[0146] For example, the third frequency domain resource group is one of the at least one frequency domain resource groups, the third reference signal generation sequence is the reference signal generation sequence of the first device in the third frequency domain resource group, and the fourth reference signal generation sequence is the reference signal generation sequence of the second device in the third frequency domain resource group. Both the first device and the second device map reference signals in the time domain as the symbol and in the frequency domain as the third frequency domain resource group. Then, the first device can generate a reference signal according to the third reference signal generation sequence, and the second device can generate a reference signal according to the fourth reference signal generation sequence.

[0147] It should be understood that the first device can be a first user equipment, and the second device can be a second user equipment, and the first user equipment and the second user equipment can be connected to / reside on the same or different network-side devices; or, the first device can be a first network-side device, and the second device can be a second network-side device; or, the first device can be a first network-side device, and the second device can be a second user equipment, and the network-side device to which the second user equipment is connected / resides can be the same as or different from the first network-side device; or, the first device can be a first user equipment, and the second device can be a second network-side device, and the network-side device to which the first user equipment is connected / resides can be the same as or different from the second network-side device.

[0148] It should be understood that the network-side equipment can be an evolved Node B (eNB) in LTE, a Transmission / Reception Point (TRP) in NR, or other equipment capable of scheduling and controlling the aforementioned user equipment.

[0149] Optionally, as an embodiment, the reference signal generation sequence is determined by the first device based on a second set of parameters. The parameters in the second set of parameters include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, network-side configuration parameters, and combined parameters. The combined parameters are a combination of multiple parameters among user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0150] Alternatively, as another embodiment, the correspondence between the frequency domain resource group and the reference signal generation sequence is predetermined.

[0151] Optionally, as another embodiment, when the first device is a user equipment, the correspondence between the frequency domain resource group and the reference signal generation sequence is sent to the first device by the network-side device connected to the first device.

[0152] In this embodiment of the application, by configuring different cyclic shift or orthogonal codes for the reference signal generation sequences of different devices on the same frequency domain resource group, or by configuring different reference signal generation sequences for different devices on the same frequency domain resource group, the RS of devices occupying different bandwidths can be orthogonal on the same frequency domain resource group, thereby improving the reuse efficiency of RS resources and realizing the reuse of RS resources of multiple devices.

[0153] Further, step 701 is specifically implemented as follows: the first device determines the first reference signal generation sequence corresponding to the first frequency domain resource group and determines the second reference signal generation sequence corresponding to the second frequency domain resource group; at this time, step 702 is specifically implemented as follows: the first device generates the first reference signal sequence of the reference signal according to the first reference signal generation sequence and maps it to the time-frequency resources of the symbol in the time domain and the first frequency domain resource group in the frequency domain; the first user equipment generates the second reference signal sequence of the reference signal according to the second reference signal generation sequence and maps it to the time-frequency resources of the symbol in the time domain and the second frequency domain resource group in the frequency domain.

[0154] It should be understood that the cyclic shift or orthogonal codes used by the first device to generate the first reference signal sequence and the second reference signal sequence may be the same or different.

[0155] The methods of the embodiments of this application will be further described below with reference to specific examples.

[0156] Figure 8 This is a schematic diagram of RS resource reuse across multiple devices according to an embodiment of this application. For example... Figure 8As shown, this RB includes four frequency domain resource groups (N to N+3) in the frequency domain and seven symbols (0 to 6) in the time domain. Specifically, device 1 transmits data on the time-frequency resources with symbol 2 in the time domain and frequency domain resource groups N to N+3 in the frequency domain; device 2 transmits data on the time-frequency resources with symbols 4 and 5 in the time domain and frequency domain resource groups N and N+1 in the frequency domain; and device 3 transmits data on the time-frequency resources with symbols 4 and 5 in the time domain and frequency domain resource groups N+2 and N+3 in the frequency domain. Device 1, Device 2, and Device 3 all transmit reference signals on symbol 3 (time-frequency resources shown in gray squares). Specifically, Device 1 transmits reference signals on time-frequency resources with symbol 3 in the time domain and frequency resource groups N to N+3 in the frequency domain; Device 2 transmits reference signals on time-frequency resources with symbol 3 in the time domain and frequency resource groups N and N+1 in the frequency domain; and Device 3 transmits reference signals on time-frequency resources with symbol 3 in the time domain and frequency resource groups N+2 and N+3 in the frequency domain.

[0157] In this embodiment of the application, a reference signal may include a reference signal sequence generated based on a reference signal generation sequence, or it may include multiple reference signal sequences generated based on multiple base sequences.

[0158] In this embodiment, one frequency domain resource group corresponds to one reference signal generation sequence. Each of multiple different frequency domain resource groups may correspond to a different reference signal generation sequence or the same reference signal generation sequence. Each frequency domain resource group may include one or more subcarriers. The correspondence between frequency domain resource groups and reference signal generation sequences can be, for example, related by the index of the frequency domain resource group and the index of the reference signal generation sequence, and so on. For example, frequency domain resource group indices 1, 2, and 3 correspond to reference signal generation sequence index 1, frequency domain resource group index 5 corresponds to reference signal generation sequence index 2, and so on. Let's assume... Figure 8 The mid-frequency domain resource groups N, N+1, N+2, and N+3 correspond to the reference signal generation sequences M0, M1, M2, and M3, respectively. M0, M1, M2, and M3 can be the same, can be completely different, or can be partially the same and partially different.

[0159] Furthermore, it should be understood that the reference signal generation sequence used by the device on a specific frequency domain resource group can be determined by the device based on a second parameter set. The parameters in the second parameter set include one or more of the following: user equipment specific parameters, time domain specific parameters, cell specific parameters, network-side device specific parameters, frequency domain specific parameters, network-side configuration parameters, or combined parameters. The combined parameters are a combination of features of multiple parameters among user equipment specific parameters, time domain specific parameters, cell specific parameters, network-side device specific parameters, frequency domain specific parameters, and network-side configuration parameters. Alternatively, the second parameter set can be specified by a protocol; or, when the device is a user equipment, it can be notified to the user equipment by the network-side device through a configuration message. This application embodiment does not impose any restrictions on this.

[0160] For a single device, the device generates a reference signal sequence of a reference signal using a reference signal generation sequence corresponding to the frequency domain resource group it occupies, and maps it onto the time-frequency resources corresponding to the frequency domain resource group.

[0161] Taking device 1 as an example, device 1 generates reference signal sequences based on reference signal generation sequences M0, M1, M2 and M3, and maps them to time-frequency resources with symbol 3 in the time domain and frequency-domain resource groups N, N+1, N+2 and N+3 in the frequency domain, respectively.

[0162] It should be understood that when a device generates a reference signal sequence based on a reference signal generation sequence, it may use corresponding orthogonal parameters to ensure the orthogonality / quasi-orthogonality of reference signals between different devices. For example, when the reference signal generation sequence used is a ZC sequence, the orthogonal parameter is a cyclic shift; when the reference signal generation sequence used is a pseudo-random sequence, the orthogonal parameter is an orthogonal code. The orthogonal parameters used may be determined by the device based on a first parameter set, which includes one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters; when the device is a user equipment, it may be notified to the user equipment by the network-side device, and this application embodiment does not limit this.

[0163] The orthogonal parameters used by the same device to generate the reference signal sequence can be the same or different, but it is preferable to use the same orthogonal parameters. When the same device uses the same orthogonal parameters, the device can determine a cyclic shift based on the parameters; in this case, if the device is a user device, the network-side device can only notify the user device of one orthogonal parameter.

[0164] On the same frequency domain resource group, different devices can use different orthogonal parameters of the same reference signal generation sequence to generate their own reference signal sequences. For example, on frequency domain resource group N, device 1 and device 2 use different orthogonal parameters to generate their reference signal sequences using reference signal generation sequence M0. Furthermore, on the same frequency domain resource group, different devices can use different reference signal generation sequences to generate their own reference signal sequences. For example, on frequency domain resource group N, device 1 and device 2 use reference signal generation sequences M01 and M02 respectively to generate their own reference signal sequences.

[0165] Figure 8 Five specific examples of the reference signal generation sequences and orthogonality parameters used by each device in each frequency domain resource group are shown in Tables 6, 7, 8, 9, and 10:

[0166] Table 6

[0167]

[0168] Table 7

[0169]

[0170]

[0171] Table 8

[0172]

[0173] Table 9

[0174]

[0175] Table 10

[0176]

[0177] As shown in Table 6, from the perspective of a single device, the RS corresponding to the transmitted data can use the same orthogonal parameter to generate the sequence of multiple reference signals.

[0178] As shown in Table 7, from the perspective of a single device, the RS corresponding to the transmitted data can use different orthogonal parameters to generate sequences from multiple reference signals.

[0179] As shown in Table 8, from the perspective of a single device, the RS corresponding to the transmitted data can use the same reference signal generation sequence on different frequency domain resource groups.

[0180] As shown in Table 9, from the perspective of different devices, the RS corresponding to the transmitted data can use different reference signal generation sequences on the same frequency domain resource group; from the perspective of one device, the RS corresponding to the transmitted data can use different reference signal generation sequences on different frequency domain resource groups.

[0181] As shown in Table 10, from the perspective of different devices, the RS corresponding to the data transmission can use different reference signal generation sequences on the same frequency domain resource group; from the perspective of one device, the RS corresponding to the data transmission can use the same reference signal generation sequence on different frequency domain resource groups.

[0182] In this embodiment of the application, by using the reference signal generation sequence used to generate the reference signal corresponding to the frequency domain resource group, the reuse rate of RS resources can be improved, the reuse of RS resources of multiple devices can be realized, and the orthogonality / quasi-orthogonality of RS between multiple devices can also be guaranteed.

[0183] This application also discloses a device 1 for performing... Figure 7 The method performed by the first device in the illustrated embodiment. The device may include tools for performing... Figure 7 The illustrated embodiment is a unit of the method executed by the first device.

[0184] Specifically, the device may include a determining unit and a signal generating unit, wherein the determining unit is configured to determine at least one reference signal generation sequence corresponding to at least one frequency domain resource group on the symbol carrying the reference signal for transmitting the reference signal, wherein one frequency domain resource group corresponds to one reference signal generation sequence; the signal generating unit is configured to generate the reference signal according to the at least one reference signal generation sequence and map it onto time-frequency resources where the time domain is the symbol and the frequency domain is the at least one frequency domain resource group.

[0185] Optionally, as an embodiment, when both the first device and the second device map reference signals on time-frequency resources where the symbol is in the time domain and the third frequency domain resource group is in the frequency domain, the cyclic shift or orthogonal codes used by the first device and the second device to generate reference signals according to the third reference signal generation sequence are different; wherein, the third frequency domain resource group is one of the at least one frequency domain resource group, and the third reference signal generation sequence is the reference signal generation sequence corresponding to the third frequency domain resource group.

[0186] Optionally, in one implementation of this embodiment, the cyclic shift or orthogonal code is determined by the first device based on a first parameter set, wherein the parameters in the first parameter set include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0187] Alternatively, in another implementation of this embodiment, when the first device is a user equipment, the cyclic shift or orthogonal code is notified to the first device by the network-side device to which the first device is connected.

[0188] Optionally, as another embodiment, when both the first device and the second device map reference signals on time-frequency resources with the symbol in the time domain and the third frequency domain resource group in the frequency domain, the reference signal generation sequence of the first device in the third frequency domain resource group is different from the reference signal generation sequence of the second device in the third frequency domain resource group.

[0189] Optionally, the determining unit is specifically used to determine a first reference signal generation sequence corresponding to a first frequency domain resource group and a second reference signal generation sequence corresponding to a second frequency domain resource group; wherein, the signal generation unit is specifically used to: generate a first reference signal sequence of the reference signal according to the first reference signal generation sequence and map it onto time-frequency resources where the time domain is the symbol and the frequency domain is the first frequency domain resource group; generate a second reference signal sequence of the reference signal according to the second reference signal generation sequence and map it onto time-frequency resources where the time domain is the symbol and the frequency domain is the second frequency domain resource group.

[0190] Optionally, the reference signal generation sequence is determined by the device based on a second set of parameters, which includes one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, network-side configuration parameters, and combined parameters. The combined parameters are a combination of multiple parameters among user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0191] Alternatively, the correspondence between the frequency domain resource group and the reference signal generation sequence is predetermined.

[0192] Alternatively, when the device is a user equipment, the correspondence between the frequency domain resource group and the reference signal generation sequence is sent to the device by the network-side device to which the device is connected.

[0193] This application also discloses a device 2, the schematic diagram of which is shown below. Figure 6 The physical device 600 shown includes a processor 602, a memory 603, a transmitter 601, and a receiver 604.

[0194] The receiver 604, transmitter 601, processor 602, and memory 603 are interconnected via a bus 606. The bus 606 can be an ISA bus, PCI bus, or EISA bus, etc. This bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 The symbol is represented by only one double-headed arrow, but this does not mean that there is only one bus or one type of bus. In specific applications, transmitter 601 and receiver 604 can be coupled to antenna 605.

[0195] Memory 603 is used to store programs. Specifically, the program may include program code, which includes computer operation instructions. Memory 603 may include read-only memory and random access memory, and provides instructions and data to processor 602. Memory 603 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk drive.

[0196] The processor 602 executes the program stored in the memory 603.

[0197] Specifically, in this device, the processor 602 is used to perform the following methods:

[0198] Determine at least one reference signal generation sequence corresponding to at least one frequency domain resource group on the symbol carrying the reference signal for transmitting the reference signal, wherein one frequency domain resource group corresponds to one reference signal generation sequence;

[0199] The reference signal is generated based on the at least one reference signal generation sequence and mapped onto time-frequency resources that are the symbol in the time domain and the at least one frequency domain resource group in the frequency domain.

[0200] The above is as stated in this application. Figure 7 The method executed by the first device disclosed in the illustrated embodiment can be applied to, or implemented by, processor 602. Processor 602 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the hardware of processor 602 or by instructions in software form. The processor 602 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 603, and processor 602 reads the information from memory 603 and, in conjunction with its hardware, completes the steps of the above method.

[0201] Optionally, as an embodiment, when both the first device and the second device map a reference signal in the time domain as the symbol and in the frequency domain as the third frequency domain resource group, the cyclic shift or orthogonal codes used by the first device and the second device to generate the reference signal sequence according to the third reference signal generation sequence are different; wherein, the third frequency domain resource group is one of the at least one frequency domain resource group, and the third reference signal generation sequence is the reference signal generation sequence corresponding to the third frequency domain resource group.

[0202] Optionally, in one specific implementation of this embodiment, the cyclic shift or orthogonal code is determined by the first device based on a first parameter set, wherein the parameters in the first parameter set include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0203] Alternatively, in another specific implementation of this embodiment, when the first device is a user equipment, the cyclic shift or orthogonal code is notified to the first device by the network-side device connected to the first device.

[0204] Optionally, as another embodiment, when both the first device and the second device map reference signals on time-frequency resources with the symbol in the time domain and the third frequency domain resource group in the frequency domain, the reference signal generation sequence of the first device in the third frequency domain resource group is different from the reference signal generation sequence of the second device in the third frequency domain resource group.

[0205] Optionally, as an embodiment, the reference signal generation sequence is determined by the first device based on a second set of parameters. The parameters in the second set of parameters include one or more of user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, network-side configuration parameters, and combined parameters. The combined parameters are a combination of multiple parameters among user equipment-specific parameters, time-domain-specific parameters, cell-specific parameters, network-side device-specific parameters, frequency-domain-specific parameters, and network-side configuration parameters.

[0206] Alternatively, as another embodiment, the correspondence between the frequency domain resource group and the reference signal generation sequence is predetermined.

[0207] Alternatively, as another embodiment, when the first device is a user equipment, the correspondence between the frequency domain resource group and the reference signal generation sequence is sent to the first device by the network-side device connected to the first device.

[0208] Further, the processor 602 determines at least one reference signal generation sequence corresponding to at least one frequency domain resource group on the symbol carrying the reference signal for transmitting the reference signal. Specifically, the processor 602 determines a first reference signal generation sequence corresponding to a first frequency domain resource group and a second reference signal generation sequence corresponding to a second frequency domain resource group. At this time, the processor 602 generates the reference signal according to the at least one reference signal generation sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the at least one frequency domain resource group. Specifically, the processor 602 generates a first reference signal sequence of the reference signal according to the first reference signal generation sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the first frequency domain resource group; and generates a second reference signal sequence of the reference signal according to the second reference signal generation sequence and maps it to time-frequency resources where the time domain is the symbol and the frequency domain is the second frequency domain resource group.

[0209] This application also proposes a computer-readable storage medium 4 that stores one or more programs, the programs including instructions that, when executed by a portable electronic device including multiple applications, enable the portable electronic device to perform... Figure 7 The method of the illustrated embodiment.

[0210] This application also provides a communication system, including the aforementioned device 1 or device 2.

[0211] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0212] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0213] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0214] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0215] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0216] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0217] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for receiving a reference signal, characterized in that, include: A reference signal is received, wherein the reference signal is a demodulated reference signal DMRS and the time and frequency resources used are at least two frequency domain resource groups on the same symbol and in the frequency domain, wherein the at least two frequency domain resource groups include a first frequency domain resource group and a second frequency domain resource group. The first frequency domain resource group and the second frequency domain resource group correspond to two different frequency domain combs on the frequency domain resources: The first frequency domain comb of the two different frequency domain combs contains M subcarriers in every N subcarriers, and the M subcarriers are equally spaced. The second frequency domain comb of the two different frequency domain combs contains M' subcarriers in every N subcarriers, and the M' subcarriers are equally spaced. The M' subcarriers are different from the M subcarriers, and M, M', and N are all positive integers, and M or M' is less than N; or... Each of the two different frequency domain combs is used to obtain a subcarrier from the same continuous frequency domain resource contained in the time-frequency resource every Q subcarriers, where Q is a positive integer; The reference signal includes a first reference signal sequence and a second reference signal sequence, wherein the first reference signal sequence corresponds to a first base sequence, the second reference signal sequence corresponds to a second base sequence, the first reference signal sequence is mapped onto time-frequency resources in the time domain that are the symbols and in the frequency domain that are the first frequency domain resource group, and the second reference signal sequence is mapped onto time-frequency resources in the time domain that are the symbols and in the frequency domain that are the second frequency domain resource group.

2. The method as described in claim 1, characterized in that, The cyclic shift of the first reference signal sequence is the same as the cyclic shift of the second reference signal sequence.

3. The method as described in claim 1 or 2, characterized in that, The reference signal is received from the first device.

4. The method as described in claim 3, characterized in that, The first device is either a first user equipment or a first base station.

5. The method as described in claim 1 or 2, characterized in that, The first reference signal sequence is received from the first device, and the second reference signal sequence is received from the second device.

6. The method as described in claim 5, characterized in that, The at least two frequency domain resource groups further include a third frequency domain resource group; the reference signal further includes a reference signal from the first device and the second device mapped onto time-frequency resources of the symbol in the time domain and the third frequency domain resource group in the frequency domain, wherein the reference signal from the first device mapped onto time-frequency resources of the symbol in the time domain and the third frequency domain resource group in the frequency domain, and the reference signal from the second device mapped onto time-frequency resources of the symbol in the time domain and the third frequency domain resource group in the frequency domain, are both based on a third base sequence but use different cyclic shifts or orthogonal codes.

7. The method as described in claim 1 or 2, characterized in that, The first frequency domain resource group and the second frequency domain resource group include the same number of subcarriers.

8. The method as described in claim 1 or 2, characterized in that, The same continuous frequency domain resource is a resource block RB.

9. An apparatus for receiving a reference signal, characterized in that, include: A module for receiving a reference signal, wherein the reference signal is a demodulated reference signal DMRS and the time-frequency resources used are at least two frequency domain resource groups on the same symbol and in the frequency domain, wherein the at least two frequency domain resource groups include a first frequency domain resource group and a second frequency domain resource group. The first frequency domain resource group and the second frequency domain resource group correspond to two different frequency domain combs on the frequency domain resources: The first frequency domain comb of the two different frequency domain combs contains M subcarriers in every N subcarriers, and the M subcarriers are equally spaced. The second frequency domain comb of the two different frequency domain combs contains M' subcarriers in every N subcarriers, and the M' subcarriers are equally spaced. The M' subcarriers are different from the M subcarriers, and M, M', and N are all positive integers, and M or M' is less than N; or... Each of the two different frequency domain combs is used to obtain a subcarrier from the same continuous frequency domain resource contained in the time-frequency resource every Q subcarriers, where Q is a positive integer; The reference signal includes a first reference signal sequence and a second reference signal sequence, wherein the first reference signal sequence corresponds to a first base sequence, the second reference signal sequence corresponds to a second base sequence, the first reference signal sequence is mapped onto time-frequency resources in the time domain that are the symbols and in the frequency domain that are the first frequency domain resource group, and the second reference signal sequence is mapped onto time-frequency resources in the time domain that are the symbols and in the frequency domain that are the second frequency domain resource group.

10. The apparatus as claimed in claim 9, characterized in that, The cyclic shift of the first reference signal sequence is the same as the cyclic shift of the second reference signal sequence.

11. The apparatus as claimed in claim 9 or 10, characterized in that, The reference signal is received from a first device, which is either a first user equipment or a first base station.

12. The apparatus as claimed in claim 9 or 10, characterized in that, The first reference signal sequence is received from the first device, and the second reference signal sequence is received from the second device.

13. The apparatus as claimed in claim 9 or 10, characterized in that, The first frequency domain resource group and the second frequency domain resource group include the same number of subcarriers.

14. The apparatus as claimed in claim 9 or 10, characterized in that, The same continuous frequency domain resource is a resource block RB.

15. A method for transmitting a reference signal, characterized in that, include: A reference signal is transmitted, wherein the reference signal is a demodulation reference signal DMRS and the time-frequency resources used are at least two frequency domain resource groups on the same symbol, wherein the at least two frequency domain resource groups include a first frequency domain resource group and a second frequency domain resource group. The first frequency domain resource group and the second frequency domain resource group correspond to two different frequency domain combs on the frequency domain resources: The first frequency domain comb of the two different frequency domain combs contains M subcarriers in every N subcarriers, and the M subcarriers are equally spaced. The second frequency domain comb of the two different frequency domain combs contains M' subcarriers in every N subcarriers, and the M' subcarriers are equally spaced. The M' subcarriers are different from the M subcarriers, and M, M', and N are all positive integers, and M or M' is less than N; or... Each of the two different frequency domain combs is used to obtain a subcarrier from the same continuous frequency domain resource contained in the time-frequency resource every Q subcarriers, where Q is a positive integer; The reference signal includes a first reference signal sequence and a second reference signal sequence, wherein the first reference signal sequence corresponds to a first base sequence, the second reference signal sequence corresponds to a second base sequence, the first reference signal sequence is mapped onto time-frequency resources in the time domain that are the symbols and in the frequency domain that are the first frequency domain resource group, and the second reference signal sequence is mapped onto time-frequency resources in the time domain that are the symbols and in the frequency domain that are the second frequency domain resource group.

16. The method as described in claim 15, characterized in that, The cyclic shift of the first reference signal sequence is the same as the cyclic shift of the second reference signal sequence.

17. The method as described in claim 15 or 16, characterized in that, The two different frequency domain combs have the same subcarrier offset between adjacent comb teeth, but have different starting subcarriers.

18. The method as described in claim 15 or 16, characterized in that, The first frequency domain resource group and the second frequency domain resource group include the same number of subcarriers.

19. The method as described in claim 15 or 16, characterized in that, The first base sequence and the second base sequence are determined based on different base sequence indices.

20. The method as described in claim 19, characterized in that, The at least two frequency domain resource groups further include a third frequency domain resource group; the reference signal further includes a reference signal from the first device and the second device mapped onto time-frequency resources of the symbol in the time domain and the third frequency domain resource group in the frequency domain, wherein the reference signal from the first device mapped onto time-frequency resources of the symbol in the time domain and the third frequency domain resource group in the frequency domain, and the reference signal from the second device mapped onto time-frequency resources of the symbol in the time domain and the third frequency domain resource group in the frequency domain, are both based on a third base sequence but use different cyclic shifts or orthogonal codes.

21. The method as described in claim 15 or 16, characterized in that, The same continuous frequency domain resource is a resource block RB.

22. An apparatus for transmitting a reference signal, characterized in that, Includes modules for implementing the method as claimed in any one of claims 15 to 21.

23. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions that, when executed, cause the method as described in any one of claims 1 to 8 to be implemented, or cause the method as described in any one of claims 15 to 21 to be implemented.

24. A computer program product, characterized in that, Includes a computer program or instructions that, when executed, cause the method as described in any one of claims 1 to 8 to be implemented, or cause the method as described in any one of claims 15 to 21 to be implemented.

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