CN110945828B

CN110945828B - Demodulation reference signal processing method and device, communication device and storage medium

Info

Publication number: CN110945828B
Application number: CN201980002947.7A
Authority: CN
Inventors: 朱亚军
Original assignee: Xiaomi Communications Co Ltd
Current assignee: Xiaomi Communications Co Ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2021-08-24
Anticipated expiration: 2039-11-11
Also published as: CN110945828A; WO2021092735A1

Abstract

The embodiment of the application discloses a signal processing method and device, communication equipment and a storage medium. The DMRS processing method applied to the base station provided by the embodiment of the application comprises the following steps: generating a DMRS sequence according to the identification ID of the reference time domain unit; and transmitting the DMRS on an unauthorized channel according to the DMRS sequence.

Description

Demodulation reference signal processing method and device, communication device and storage medium

Technical Field

The present invention relates to the field of wireless communications technologies, but not limited to the field of wireless communications technologies, and in particular, to a Demodulation Reference Signal (DMRS) processing method and apparatus, a communication device, and a storage medium.

Background

The continuous emergence of new internet applications such as Augmented Reality (AR) or Virtual Reality (VR), vehicle-to-vehicle communication, and the like, puts higher demands on wireless communication technology, and drives the continuous evolution of wireless communication technology to meet the application requirements. Currently, cellular mobile communication technology is in the evolution stage of new generation technology. An important feature of the new generation of technology is to support flexible configuration of multiple service types. Due to the different traffic types, there are different requirements for wireless communication technology.

For example, enhanced Mobile Broadband (eMBB) traffic type mainly requires focusing on large bandwidth, high rate, and the like. The main requirements of the high-reliability Low Latency Communications (URLLC) service type are focused on higher reliability and Low Latency. The major requirement of mass Machine Type Communication (mtc) service types is to focus on the large connection number.

New generation wireless communication systems therefore require flexible and configurable designs to support the transmission of multiple traffic types.

As the demand for services is driven, the demand for services cannot be met only by using licensed spectrum, so it is considered to deploy mobile networks on unlicensed spectrum. There may be other systems, such as WiFi systems, on the unlicensed channel, and how to guarantee fair resource sharing of different communication systems on the unlicensed spectrum needs to research into how to use the unlicensed channel by a License Assisted Access (LAA) mechanism in the third Generation Partnership Project (3 GPP) in the development of wireless communication systems. That is, use over the unlicensed spectrum is facilitated by licensed frequency bands. In order to ensure coexistence with other systems such as WiFi on the unlicensed spectrum, a Listen Before Transmit (LBT) mechanism is also introduced in LAA, and a transmitting end needs to detect whether a channel is idle when data needs to be transmitted, and can transmit the data only after the channel is in an idle state.

After occupying the channel on the unlicensed spectrum based on the LBT mechanism, the base station sends downlink data to User Equipment (UE). Due to the different distances between the UE and the base station, the path lengths through which the radio signals transmitted by the base station reach the UE are different, and the attenuation is different. Therefore, at this time, the base station still needs to issue the DMRS for channel estimation to help the UE demodulate the received downlink data.

Disclosure of Invention

The embodiment of the application provides a DMRS processing method and device, communication equipment and a storage medium.

A first aspect of the present embodiment provides a DMRS processing method applied to a base station, where the DMRS processing method is applied to the base station, and the method includes:

generating a DMRS sequence according to the identification ID of the reference time domain unit;

and transmitting the DMRS on an unauthorized channel according to the DMRS sequence.

A second aspect of the present application provides a demodulation reference signal DMRS processing method, including:

receiving a DMRS on an unlicensed channel;

demodulating the received DMRS according to the DMRS sequence.

A third aspect of the present embodiment provides a demodulation reference signal DMRS processing apparatus, which is applied to a base station, and the apparatus includes:

a generating module configured to generate a DMRS sequence according to the identification ID of the reference time domain unit;

a transmitting module configured to transmit the DMRS on an unlicensed channel according to the DMRS sequence.

A third aspect of the present embodiment provides a DMRS processing apparatus, including:

an obtaining module configured to obtain a DMRS sequence determined according to an identification ID of a reference time domain unit;

a receiving module configured to receive a DMRS on an unlicensed channel;

a demodulation module configured to demodulate the received DMRS according to the DMRS sequence.

A fifth aspect of an embodiment of the present application provides a communication device, including:

a transceiver;

a memory;

and the processor is respectively connected with the transceiver and the memory, and is configured to control the transceiver to transmit and receive wireless signals by executing computer-executable instructions stored in the memory, and implement the DMRS processing method provided by any one of the technical solutions of the first aspect or the second aspect.

A sixth aspect of embodiments of the present application provides a computer non-transitory storage medium having computer-executable instructions stored thereon; the computer-executable instructions are executed by a processor to implement the DMRS processing method provided by any of the technical solutions of the first aspect or the second aspect.

In the embodiment of the application, the identifier of the reference time domain unit is specially introduced, the identifier is used for generating the DMRS sequence of the DMRS, and the DMRS sequence is not generated directly based on the time domain unit for transmitting the DMRS any more. Therefore, the base station can finish the generation of the DMRS sequence before occupying the unauthorized spectrum, and can directly issue the DMRS based on the generated DMRS sequence once occupying the unauthorized channel, thereby reducing the phenomenon that the DMRS misses the time domain unit for issuing the DMRS due to the fact that the DMRS sequence is generated based on the number of the time domain unit after occupying the unauthorized channel, and ensuring the timely issuing of the DMRS.

Drawings

Fig. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a DMRS processing method according to an embodiment of the present application;

fig. 3 is a schematic flowchart of a DMRS processing method according to an embodiment of the present application;

fig. 4 is a timing diagram of a DAMR sequence and DMRS transmission provided in this application;

fig. 5 is a schematic flowchart of a DMRS processing method according to an embodiment of the present application;

fig. 6 is a timing diagram of a DAMR sequence and DMRS transmission provided in this application;

fig. 7 is a timing diagram of a DAMR sequence and DMRS transmission provided in this application;

fig. 8 is a timing diagram of a DAMR sequence and DMRS transmission provided in this application;

fig. 9 is a schematic structural diagram of a DMRS processing apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another DMRS processing apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a UE according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a base station according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the examples of the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the embodiments of the application, as detailed in the appended claims.

The terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information in the embodiments of the present disclosure, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: a number of UEs 11 and a number of base stations 12.

Among other things, the UE11 may be a device that provides voice and/or data connectivity to a user. The UE11 may communicate with one or more core networks via a Radio Access Network (RAN), and the UE11 may be internet of things UEs, such as sensor devices, mobile phones (or "cellular" phones), and computers with internet of things UEs, such as stationary, portable, pocket, hand-held, computer-included, or vehicle-mounted devices. For example, a Station (STA), a subscriber unit (subscriber unit), a subscriber Station (subscriber Station), a mobile Station (mobile), a remote Station (remote Station), an access point (ap), a remote UE (remote terminal), an access UE (access terminal), a user equipment (user terminal), a user agent (user agent), a user equipment (user device), or a user UE (user equipment, UE). Alternatively, the UE11 may be a device of an unmanned aerial vehicle. Alternatively, the UE11 may be a vehicle-mounted device, for example, a vehicle computer with a wireless communication function, or a wireless communication device externally connected to the vehicle computer. Alternatively, the UE11 may be a roadside device, such as a street lamp, a signal lamp, or other roadside device with wireless communication capability.

The base station 12 may be a network side device in a wireless communication system. The wireless communication system may be a 5G system, also called New Radio (NR) system or 5G NR system. Alternatively, the wireless communication system may be a system supporting New air-interface unlicensed-channel communication (NR-U). Alternatively, the wireless communication system may be a next generation system of a 5G system. Among them, the Access Network in the 5G system may be referred to as NG-RAN (New Generation-Radio Access Network, New Generation Radio Access Network).

The base station 12 may be a base station (gNB) adopting a centralized distributed architecture in the 5G system. When the base station 12 adopts a centralized distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DU). A Packet Data Convergence Protocol (PDCP) layer, a Radio Link layer Control Protocol (RLC) layer, and a Media Access Control (MAC) layer are provided in the central unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.

The base station 12 and the UE11 may establish a wireless connection over a wireless air interface. In different embodiments, the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G next generation mobile communication network technology standard.

In some embodiments, an E2E (End to End) connection may also be established between UEs 11. In some embodiments, the wireless communication system may further include a network management device 13.

Several base stations 12 are connected to a network management device 13, respectively. The network Management device 13 may be a Core network device in a wireless communication system, for example, the network Management device 13 may be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC). Alternatively, the Network management device may also be other core Network devices, such as a Serving GateWay (SGW), a Public Data Network GateWay (PGW), a Policy and Charging Rules Function (PCRF), a Home Subscriber Server (HSS), or the like. The implementation form of the network management device 13 is not limited in the embodiment of the present disclosure.

DMRS may be used for channel detection, demodulation of physical channels, and the like. In a wireless communication system, DMRS is transmitted based on a DMRS sequence.

The DMRS sequences are generated in relation to the time domain element transmitting the DMRS. For example, DMRS sequences are generated in relation to the time-domain symbol positions at which the DMRS is transmitted.

But the occupation of the unlicensed channel on the unlicensed channel is based on the contention mechanism of LBT. Thus, the base station will not know when the unlicensed channel will be occupied, so the DMRS sequence cannot be generated in advance. After occupying an unlicensed channel to an unlicensed channel, a DMRS may be transmitted in the first few symbols, and a certain time is required to generate a DMRS sequence. If the DMRS sequence is generated out of time, time domain resources for transmitting the DMRS are missed, and therefore the DMRS is failed to transmit. And the UE cannot perform channel estimation and physical layer channel demodulation correctly without receiving the DMRS, so that the base station has a high data transmission failure rate in the COT of the unlicensed channel occupied by the base station.

As shown in fig. 2, a DMRS processing method according to an embodiment of the present application is applied to a base station, and includes:

s110: generating a DMRS sequence according to the identification ID of the reference time domain unit;

s120: the DMRS is transmitted on an unlicensed channel according to the DMRS sequence.

The DMRS processing method is applied to a base station, and the base station can be any base station with cellular mobile communication. The method may be used for transmission of DMRS by a base station when communicating using an unlicensed channel.

The unlicensed channel is a transmission channel configured based on an unlicensed spectrum.

In the unlicensed channel, the time domain resource is also divided into a plurality of time domain units according to the time domain sorting, and each time domain unit is numbered. But the unlicensed channels are preempted based on the LBT mechanism. The base station cannot know the unauthorized channel preempted by the base station in advance, and cannot determine the number of the time domain unit successfully preempted by the base station on the unauthorized channel. The ID of the reference time domain unit in this application is different from the number of each time domain unit divided based on time sequence on the unlicensed channel.

The time domain unit may be one or more symbols. And the DMRS sequence is generated, the base station may transmit the DMRS based on the DMRS sequence. For example, the DMRS sequence is modulated onto a carrier of an unlicensed channel for transmission.

However, on the unlicensed channel, since the base station cannot estimate the number of the time domain unit of the unlicensed channel occupied by the base station, if the base station occupies the unlicensed channel and then generates the DMRS sequence, the time consumed by the generation of the DMRS sequence may cause the missed opportunity for transmitting the DMRS on the occupied unlicensed channel, thereby causing the failure of DMRS transmission.

Therefore, in the embodiment of the application, the identifier of the reference time domain unit is introduced, so that the DMRS sequence can be generated based on the identifier of the reference time domain unit before the unlicensed channel is not occupied, and thus, the DMRS can be directly transmitted based on the pre-generated DMRS sequence once the unlicensed channel is occupied.

For example, S110 may include: DMRS sequences are generated based on equation (1):

wherein, c_initIs an initial value of the DMRS sequence.

Is the number of symbols contained in a slot;

the number of time slots contained in a wireless frame is the number of time slots under the condition of subcarrier interval configuration u;

is the cell number (ID) of the serving cell; n is_SCIDIs an offset value; a is a first reference factor, and a specific value may be preset, for example, a is 17. b is a second reference factor, and a specific value can be preset, for example, a is 31. The l may be directly the identification of the aforementioned reference time-domain unit or an identification generated based on the identification of the reference time-domain unit. Since the l is known in advance before the unlicensed channel on the unlicensed channel is occupied, the l does not need to be determined according to the time domain number of the transmitted DMRS symbol after the unlicensed channel is occupied, and thus, the DMRS sequence can be generated in advance.

The DMRS may be used for channel estimation performed by the UE to communicate with the base station, and based on the channel estimation, the attenuation of the channel to the radio signal sent by the base station may be determined, and then when demodulating the data sent by the base station, the DMRS may obtain a signal strength threshold according to the attenuation of the radio signal by the UE, so as to assist the UE in demodulating the data sent by the base station.

In some embodiments, S110 may include: and before the unlicensed channel is occupied, determining the DMRS sequence of the DMRS according to the ID.

For example, the base station generates the DMRS sequence in advance before the unlicensed channel is not occupied, so that the phenomenon that the base station needs to immediately transmit the dam after the unlicensed channel is occupied is reduced.

In some embodiments, the ID of the reference time-domain unit comprises: an ID1 of a reference time domain unit; s110 may include: a plurality of DMRS sequences is determined from ID1 before camping on an unlicensed channel.

The ID1 of this one reference time domain element may be used for the generation of multiple DMRS sequences.

In some embodiments, when the reference time domain unit has only 1 ID, the ID1 used by different base stations may be different. For example, the IDs 1 used by neighboring base stations may be different, thus reducing UE confusion caused by neighboring base stations using the same ID1, resulting in the same DMRS.

If the reference time domain unit is set too much, the base station needs to tell the UE which reference time domain unit identifiers are configured, more signaling consumption is generated, and only one reference time domain unit is configured for generating a plurality of DMRS sequences, so that the signaling overhead brought by the base station informing the reference time domain unit identifiers can be reduced.

If the identifier of the reference time domain unit is written into the communication protocol, the base station and the UE may write the identifier of the reference time domain unit before being put into use, and if too many identifiers of the reference time domain unit are configured, too many storage resources of the base station and the UE may be occupied, so that under the condition of configuring one identifier of the reference time domain unit, consumption of the storage resources brought by storing the identifiers may be reduced.

In some embodiments, as shown in fig. 3, S110 may include:

S111A: determining a DMRS sequence of a first DMRS within one COT of the unlicensed channel according to the ID 1;

S112A: determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of one channel occupation time of the unlicensed channel; and generating a DMRS sequence of an nth DMRS within a channel occupancy time COT of the unlicensed channel based on the IDn, wherein n is a positive integer.

A base station may transmit multiple DMRSs within one COT, and different DMRSs sequences are required when the DMRSs are different. In the case of an identity of only one reference time domain element, other identities need to be generated based on the ID1 to generate multiple DMRS sequences.

In this way, the ID1 is itself used for DMRS sequence generation for the first DMRS, while other identities outside the ID1 are related to DMRS transmission order within the COT. Therefore, after the UE blindly solves the corresponding DMRS, it may be determined that the base station occupies the remaining time of the COT, so that the remaining time may be further used for the UE to determine whether to send feedback information of downlink data or status information of an uplink channel, and the like.

For example, S112A may include: determining IDn according to the following functional relation;

IDn × S1+ ID 1; wherein S1 is the first step size and is a positive integer. For example, S1 takes on values of 1, 2, or 3. Assuming ID1 is 0 and S1 is 1, the 2 nd identity used for generating the DMRS sequence is 1; the 3rd identity used to generate the DMRS sequence is 2; the 4 th identity used for generating the DMRS sequence is 3.

S1 is configured for the base station or configured in the communication protocol. For example, the base station issues to the terminal through higher layer signaling, so that the terminal is also aware of S1. The higher layer signaling includes, but is not limited to, Radio Resource Control (RRC) signaling or MAC Control Element (CE) signaling.

In some embodiments, S1 may be generated based on an algorithm commonly known to both the base station and the UE, e.g., a random algorithm or selected from a plurality of alternative values.

In some embodiments, the IDn is configured with a maximum value, so that the value range of the IDn is reduced, and the overhead of blind demodulation of the DMRS by the terminal is reduced.

Fig. 4 is a schematic diagram illustrating that, when a DMRS is not transmitted for the first time in a COT based on an ID1 of a reference time domain unit, other idns are determined based on an ID1 and a transmission order, and a DMRS sequence is further generated.

After the LBT is passed, the base station seizes an unauthorized channel and transmits a 1 st DMRS in a time domain unit 1; and the DMRS sequence used for the 1 st DMRS is generated based on ID 1.

Time domain unit 2 and time domain unit 1 are in the same COT, and time domain unit 2 is located behind time domain unit 1, and the DMRS sequence used for transmitting the DMRS on time domain unit 2 is generated based on ID 2.

Time domain unit 3 and time domain unit 2 are in the same COT, and time domain unit 3 is located behind time domain unit 2, and the DMRS sequence used for transmitting the DMRS on time domain unit 3 is generated based on ID 3.

Time domain unit 4 and time domain unit 3 are in the same COT, and time domain unit 4 is located behind time domain unit 3, and the DMRS sequence used for transmitting the DMRS on time domain unit 4 is generated based on ID 4.

In some embodiments, as shown in fig. 5, S110 may include:

S111B: determining a DMRS sequence of a DMRS transmitted in the 1 st COT occupied in a preset time period on an unlicensed channel according to the ID 1;

S112B: determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied sequence m of the COT in the preset time period; wherein m is a positive integer greater than 1; and determining the DMRS sequence of the DMRS transmitted in the mth COT on the occupied unlicensed channel according to the IDm.

In some embodiments, the start-stop time of the preset time period may be known to both the base station and the UE, and the timing of the start-stop time adopts a universal time. Therefore, even if the UE still knows that the current COT occupies the unauthorized channel if the base station currently occupies the unauthorized channel when the UE enters the coverage range of a certain base station in the moving process, the occupation sequence of the current COT in the preset time period is known; in this way, the UE may determine, according to the occupied order of the COT corresponding to the current time and in combination with the ID1, the DMRS sequence used in the current COT.

In other embodiments, the UE is not aware of the preset time period, but the number of COTs occupied by the base station to the unlicensed channel during the preset time period is limited due to the start and stop time of the preset time period. In this way, the UE knows DMRS sequences that may correspond to all COTs within a preset time period; as such, there may be a controllable power consumption overhead when the UE blindly solves the DMRS.

It should be noted that in the method shown in fig. 5, DMRSs transmitted multiple times within one COT are generated based on the same DMRS sequence. At this time, the base station may complete the generation of all DMRS sequences at the beginning of the pre-set time period.

In some embodiments, S112B includes: determining IDm according to the following functional relation;

IDm × S2+ ID 1; wherein S2 is the second step size and is a positive integer.

S2 is configured by the base station, and if S2 is configured by the base station, the base station may issue the signaling to the terminal so that the terminal knows S2. In some embodiments, S2 may also be specified in the communication protocol. For example, the base station is issued by higher layer signaling. The higher layer signaling includes, but is not limited to, Radio Resource Control (RRC) signaling or MAC Control Element (CE) signaling.

In some embodiments, S2 may be generated based on an algorithm commonly known to both the base station and the UE, e.g., a random algorithm or selected from a plurality of alternative values.

The IDm is configured with the maximum value, so that the phenomenon that the DMRS sequences are more and further cause large power consumption overhead of UE (user equipment) for blindly solving the received DMRS due to large value range of the IDm is reduced.

Referring to fig. 6, after LBT, a base station camps on an unlicensed channel, and DMRS sequences used for DMRSs transmitted by 4 time-domain cells transmitting DMRSs contained in 1 COT are the same. For example, in fig. 6, DMRS sequences used by DMRSs transmitted by time domain elements 1 to 4 within 1 st COT are generated based on ID 1.

DMRS sequences used for DMRSs transmitted by 4 time-domain elements for transmitting DMRSs contained in the 2 nd COT shown in fig. 6 are the same. For example, in fig. 6, DMRS sequences used by DMRSs transmitted by time domain elements 1 to 4 within the 2 nd COT are generated based on ID 2.

It is apparent that fig. 6 illustrates that DMRS sequences used by DMRSs transmitted in two COTs each located within a preset time period are generated based on different IDs.

In still other embodiments, the ID of the reference time domain unit comprises: the IDs of the Y reference time domain units are different; wherein IDy of the yth reference time domain unit is determined based on the 1 st reference slot unit ID 1; y is a positive integer less than or equal to Y, Y is a positive integer equal to or greater than 2;

s110 may include: determining IDf according to a Physical Downlink Control Channel (PDCCH) associated with the first type of DMRS, and determining a DMRS sequence of the first type according to the IDf; the first-type DMRS is used for demodulating signaling carried on the PDCCH associated with the first-type DMRS; the different types of PDCCH are associated with different idfs, where f is a positive integer less than or equal to Y.

The signaling carried on the PDCCH bearer may include: downlink Control Information (DCI).

For example, the association includes: the IDf of different types of PDCCH associations differs.

For example, the information fields contained in the DCI carried on different types of PDCCHs are different, and/or the length of different formats of DCI is different.

In some embodiments, the base station may first determine the type of PDCCH (e.g., the transmission location through the PDCCH), and then determine to adjust the currently received DMRS sequence to a carrier for transmission based on the association relationship. And the terminal can determine to decode the DMRS sequence of the first DMRS currently received from the base station based on the relation between the first DMRS and the type of the PDCCH according to the type of the PDCCH, so that the UE does not need to blindly solve the DMRS sequence.

For example, in some embodiments, a PDCCH type may have 5 formats, where format 1 and format 2 may occupy 1 to 2 symbols; formats 3 to 5 occupy 4 to 14 symbols. If the 5 formats are divided into two categories, that is, format 1 and format 2 are associated with the identifier of the same time domain reference unit, and formats 3 to 5 are associated with the identifier of another time domain reference unit. Therefore, the base station issues the DMRS through the association relationship, so that the UE can directly use the DMRS sequence generated by the identifier of the corresponding reference time domain unit to detect without blind detection of the DMRS under the condition that the UE knows the type of the PDCCH issued currently, thereby realizing channel estimation and physical channel demodulation.

In other embodiments, before the base station issues the signaling carried on the PDCCH, the base station may broadcast, in advance, type information of the PDCCH to be sent when the base station occupies the unlicensed channel next time through a previous COT occupied on the licensed channel or the unlicensed channel, where the type information indicates a type of the PDCCH. At this time, if the UE receives the type information, the UE may know in advance a PDCCH signaling that the base station will issue, so as to determine which DMRS sequence to use for decoding the DMRS next time based on the association relationship, so that the UE does not need to blindly solve the DMRS, thereby reducing power consumption overhead of the UE.

Referring to fig. 7, it is assumed that IDs of 2 reference time domain units are allocated in the wireless communication system, which are ID1 and ID2, respectively. The DMRS sequences generated by ID1 or ID2 can be selected to be issued according to the format of the PDCCH which carries signaling and is demodulated by the first type of DMRS together with the current PDCCH issued by the first type of DMRS.

S110 may further include: from IDf, determine IDv; and generating a DMRS sequence of a second DMRS type issued after the first DMRS based on IDv. The DMRS of the second type may be used to demodulate Downlink data sent by a base station, for example, service data sent by the base station through a Physical Downlink Shared Channel (PDSCH).

In some embodiments, an IDf may correspond to a set of identifications, IDv may be any one of the set of identifications. In such an embodiment, if the IDf is determined once, the candidate identities required for the subsequent DMRS sequence generation for the second DMRS type are determined. For example, IDv may be a randomly selected one of the set of identifications.

In still other embodiments, determining IDv may include, from IDf: IDv is determined based on IDf and k. Where k is: the number of time domain units spaced between the transmissions of the second-type DMRS and the first-type DMRS.

For example, S110 may include: determining IDv according to the following functional relationship; IDv ═ k × S3+ IDf; wherein S3 is the third step length and is a positive integer.

One time domain unit may be used for transmission of one DMRS. One time domain unit may include: a symbol or a plurality of symbols distributed consecutively.

For example, the first type of DMRS is transmitted using the xth time domain unit, and the second type of DMRS is transmitted using the xth + kth time domain unit, then the xth + kth time domain unit and the xth time domain unit are separated by k time domain units. For example, k can be a value such as 1, 2, or 3.

In some embodiments, the method further comprises:

broadcasting a first ID for use in L1 COTs after the p COT within the occupied p COT; wherein the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l1 is a positive integer; p is a positive integer.

The base station may broadcast a first ID used in L1 COTs after the p-th COT on a Group Common Physical Downlink Control Channel (GC-PDCCH) in the p-th COT.

For example, the first ID used in the subsequent COT or COTs is broadcast in the p-th COT, so the UE will know the DMRS sequences used to transmit DMRSs in these COTs before the last L1 COTs come; as such, the UE also does not blindly solve the DMRS.

For example, the last 1 or more symbols within p COTs broadcast the first ID used within L1 COTs after the p-th COT.

If the UE newly enters the cell range formed by the base station during the moving process, the time corresponding to the P-th COT may be just missed, and at this time, the UE may request the first ID from other UEs. For example, UE1 transmits a broadcast request on an unlicensed channel at a lower transmit power than the uplink signal sent to the base station requesting that UE2, which knows the first ID, inform it of the first ID. After the UE2 receives the broadcast request, if it is determined that the first ID is directly received, the broadcast replies to the first ID, otherwise the UE keeps silent and does not reply to the broadcast request. In this way, even if a UE newly enters a cell formed by a base station, the UE can know the first ID broadcasted in P COTs and used in L1 COTs after the P COT, so that the DMRS is not blindly decoded subsequently.

Here, the method in which the UE requests the first ID from other UEs may also be used to request type information of the PDCCH type from other UEs, so that the newly entered UE does not blindly solve the DMRS subsequently.

Certainly, in specific implementation, the UE may know the IDs of the Y reference time domain units in advance, and when the UE enters a coverage area of one base station for the first time, the DMRS is blindly decoded based on the DMRS sequences generated by the IDs of the Y reference time domain units, and the ID of the reference time domain unit used in a subsequent COT can be obtained by receiving the first ID in the COT of the unlicensed channel occupied by the base station, so that the DMRS does not need to be blindly decoded any more.

In some embodiments, the method further comprises:

after transmitting the first DMRS within one COT, L2 DMRS sequences after broadcasting generate a second ID used; wherein the second ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l2 is a positive integer.

The base station may broadcast the second IDs used for generating L2 DMRS sequences after the COT on a Group Common Physical Downlink Control Channel (GC-PDCCH) within 1 COT.

For example, after the UE successfully demodulates the first DMRS in the COT, it knows that the last L DMRS sequence IDs in the COT are used for generating DMRS sequence IDs; in this way, the UE does not blindly decode DMRSs transmitted based on L2 DMRS sequences.

If a UE misses the broadcasted second ID, it may request the second ID from other UEs located around it.

As shown in fig. 8, the present embodiment provides a DMRS processing method, including:

s210: acquiring a DMRS sequence determined according to the identification ID of the reference time domain unit;

s220: receiving a DMRS on an unlicensed channel; for example, if the base station transmits the DMRS on the unlicensed channel, the terminal may receive the DMRS transmitted by the base station on the unlicensed channel;

s230: and demodulating the received DMRS according to the DMRS sequence.

In some embodiments, DMRS sequences determined according to the identification IDs of the reference time domain elements may be written in the terminal in advance. For example, before the terminal leaves the factory, a DMRS sequence determined based on the identification ID of the reference time domain cell is written in advance in a storage medium of the terminal. When the DMRS sequence needs to be used, the DMRS sequence determined according to the identifier ID of the reference time domain unit may be obtained in a reading manner.

In other embodiments, the DMRS sequence determined according to the identifier ID of the reference time domain unit may be directly issued to the terminal in advance by the base station. For example, a base station may broadcast DMRS sequences on a licensed channel to be used on an unlicensed channel.

In other embodiments, the terminal may receive an ID sent by the base station or obtain the ID based on a protocol specification, and then the terminal may determine the DMRS sequence based on the ID. For example, in the present application, the UE may determine the DMRS sequences in advance according to the identifier of the reference time domain unit, for example, calculate each DMRS sequence by using a calculation formula with the identifier of the reference time domain unit as a factor.

And the terminal side acquires the DMRS sequence determined according to the identification ID of the reference time domain unit and is used for demodulating the DMRS issued by the base station.

The DMRS signal is received on the unlicensed channel, and the received DMRS is demodulated using the DMRS sequence acquired in step S210. For example, in S230, the received DMRS may be demodulated by coherent demodulation or the like using the acquired DMRS sequence.

In some embodiments, the ID of the reference time-domain unit comprises: an ID1 of a reference time domain unit; s210 may include: a plurality of DMRS sequences is determined from ID 1.

The identity of one reference time domain element enables the simultaneous determination of multiple DMRS sequences for demodulation of the DMRS.

For example, S210 may include:

determining a DMRS sequence of a first DMRS within a channel occupancy time COT of the unlicensed channel according to the ID 1;

determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of the channel occupation time of the unlicensed channel; and determining a DMRS sequence of an nth DMRS within a channel occupancy time COT of the unlicensed channel based on the IDn, wherein n is a positive integer.

In this way, DMRS sequences corresponding to different DMRS transmission orders are different within one COT.

In some embodiments, determining IDn according to ID1 and transmission order n of DMRS within one channel occupancy time, COT, of the unlicensed channel comprises: determining IDn according to the following functional relation; IDn × S1+ ID 1; wherein S1 is the first step size and is a positive integer.

Due to the mobility of the UE, if the UE newly enters a cell, DMRS blind detection may be directly performed based on all the generated DMRS sequences. If the UE has received at least one DMRS in the current cell and has determined to demodulate the DMRS sequence corresponding to the DMRS, the DMRS sequence corresponding to the current DMRS or one or more subsequent DMRS can be determined according to the DMRS sequence of the previous DMRS and the DMRS generation mode of the base station, blind solution of the DMRS is not needed, and power consumption generated by the blind solution is reduced.

In the above embodiment, the first step size is a coefficient for generating IDn.

In some embodiments, for example, a maximum value of IDn is set, and a random algorithm may be used to randomly generate an ID and determine the DMRS sequence using the ID. At this time, due to the randomness of the ID, the UE can perform blind detection on each DMRS only when all DMRS sequences are determined.

In some embodiments, when demodulating the DMRS, if the first step size is used to determine IDn, the DMRS is demodulated using a DMRS sequence determined based on the IDn. For example, when the terminal has determined the DMRS sequences corresponding to the previous DMRS or DMRS, the terminal may directly determine the DMRS sequence used by the next DMRS sent by the base station on the COT according to the first step of deviation between two adjacent idns and based on the correspondence between the IDn and the DMRS sequences, and thus, the determined DMRS sequence may be selected to demodulate the DMRS received from the base station. And when the terminal does not determine the previous DMRS sequence, all the DMRS sequences determined based on the IDn are obtained, and the obtained DMRS sequences are used for carrying out blind solution on the DMRS received from the base station.

In some embodiments, S210 may include:

determining a DMRS sequence of a DMRS transmitted in the 1 st COT occupied in a preset time period on an unlicensed channel according to the ID 1;

determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied sequence m of the COT in the preset time period; wherein m is a positive integer greater than 1; and determining the DMRS sequence of the DMRS transmitted in the mth COT on the occupied unlicensed channel according to the IDm.

At this time, DMRS sequences used by all DMRSs transmitted in one COT within a preset time period are the same, so that after the UE successfully demodulates a DMRS in one COT, a subsequent DMRS within the COT can be demodulated according to a DMRS sequence used by demodulation of a previous DMRS, thereby reducing the number of times that the UE blindly decodes the DMRSs.

DMRS sequences used by DMRSs transmitted in two adjacent COTs are different. In other embodiments, determining IDm of mth COT on the occupied unlicensed channel according to ID1 and occupation order m of COTs within a preset time period includes: determining IDm according to the following functional relation; IDm × S2+ ID 1; wherein S2 is the second step size and is a positive integer.

Similarly, in the case of limiting the maximum value of IDm, IDs corresponding to different occupancy orders may be determined in other ways; the concrete means is not limited to the above examples.

In some embodiments, when the DMRS is demodulated if the IDn is determined using the second step length, the DMRS is demodulated using a DMRS sequence determined based on the IDm. For example, when the terminal has determined the DMRS sequence corresponding to the DMRS issued by the base station in the previous COT, the terminal may directly determine the DMRS sequence used by the base station for the DMRS sent by the next COT according to the second step of the deviation between two adjacent idms and based on the correspondence between the idms and the DMRS sequence, and thus, the determined DMRS sequence may be selected to demodulate the DMRS received from the base station.

And when the terminal does not determine the DMRS sequence used by the base station in the previous COT, all the DMRS sequences determined based on the IDm are obtained, and the obtained DMRS sequences are used for carrying out blind solution on the DMRS received from the base station.

In some embodiments, the ID of the reference time-domain unit comprises: the IDs of the Y reference time domain units are different; wherein IDy of the yth reference time domain unit is determined based on the 1 st reference slot unit ID 1; y is a positive integer less than or equal to Y, Y is a positive integer equal to or greater than 2;

s210 may include: determining IDf according to a Physical Downlink Control Channel (PDCCH) associated with the first type of DMRS, and determining a DMRS sequence of the first type according to the IDf; the first-type DMRS is used for demodulating signaling carried on the PDCCH associated with the first-type DMRS; the different types of PDCCH are associated with different idfs, where f is a positive integer less than or equal to Y.

In some embodiments, S210 may include: from IDf, determine IDv; and generating, based on IDv, a DMRS sequence for a second DMRS-like transmitted after the first DMRS-like. In still other embodiments, determining IDv may include, from IDf: IDv is determined based on IDf and k. Where k is: the number of time domain units spaced between the transmissions of the second-type DMRS and the first-type DMRS.

For example, from IDf, determination IDv includes: determining IDv according to the following functional relationship; IDv ═ k × S3+ IDf; wherein S3 is the third step length and is a positive integer.

For example, S3 takes on values of 1, 2, or 3. Assuming IDf is 0 and S3 is 1, the 2 nd identifier for generating DMRS sequence is 1 when k is 1; the 3rd identity for generating a DMRS sequence when k is 2.

S3 is issued by the base station or specified in the communication protocol. For example, the base station is issued by higher layer signaling. The higher layer signaling includes, but is not limited to, Radio Resource Control (RRC) signaling or MAC Control Element (CE) signaling.

In some embodiments, S3 may be generated based on an algorithm commonly known to both the base station and the UE, e.g., a random algorithm or selected from a plurality of alternative values.

Because the type of the PDCCH is associated with the identifier of the reference time domain unit, a DMRS sequence for demodulating the first DMRS can be determined according to the type of the PDCCH, and then the first DMRS associated with the PDCCH is received based on the DMRS sequence. After receiving the first-type DMRSs, according to an association relationship between IDs used by DMRS sequences respectively corresponding to the first-type DMRSs and the second-type DMRSs (i.e., IDv ═ k × S3+ IDf), one or more second-type DMRSs may be demodulated directly using the corresponding DMRS sequences.

In some embodiments, the method further comprises:

receiving a first ID in a p-th COT occupied by a base station, wherein the first ID is an ID of a reference time domain unit or an ID generated based on the ID of the reference time domain unit; the base station sends the first ID in the p-th occupied COT, and the terminal can receive the first ID in the p-th occupied COT.

S210 may include: determining a DMRS sequence for demodulating DMRS within L1 COTs after the p-th COT according to the first ID, wherein L1 is a positive integer; p is a positive integer.

Because the base station will broadcast the ID used in the COT of the occupied unlicensed channel in the following COT or COTs not occupied; in this way, the UE knows which ID-generated DMRS sequence is used to demodulate DMRSs in the subsequent one or more COTs, thereby reducing blind detection of DMRSs and reducing a large amount of power consumption overhead of the UE due to the blind detection.

In some embodiments, the method further comprises: receiving a second ID used by L2 DMRS sequences generated after a base station transmits a first DMRS in a COT; wherein the second ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l2 is a positive integer; s210 may include: and determining the DMRS sequences of L2 demodulated DMRSs after demodulating the first DMRS according to the second ID.

By adopting the method, the number of the DMRS for the UE blind solution can be reduced, and further, the power consumption generated by the UE blind solution of the DMRS is reduced.

As shown in fig. 9, the present embodiment provides a DMRS processing apparatus applied to a base station, where the DMRS processing apparatus includes:

a generating module 610 configured to generate a DMRS sequence according to the identification ID of the reference time domain unit;

a transmitting module 620 configured to transmit the DMRS on the unlicensed channel according to the DMRS sequence.

In some embodiments, the generating module 610 and the sending module 620 may both be program modules. The program modules, when executed by the processor, enable generation of DMRS sequences and transmission of DMRS.

In other embodiments, the generating module 610 and the sending module 620 may be both soft and hard combining modules, which include but are not limited to programmable arrays, which may be field programmable arrays or complex programmable arrays.

In other embodiments, the generating module 610 and the sending module 620 may be both a soft combining module, which includes but is not limited to: a field programmable array or a complex programmable array.

In some embodiments, the generating module 610 is configured to determine the DMRS sequence of the DMRS according to the ID before camping on the unlicensed channel.

In some embodiments, the ID of the reference time-domain unit comprises: an ID1 of a reference time domain unit;

a generating module 610 configured to determine a plurality of DMRS sequences according to the ID1 before camping on the unlicensed channel.

In some embodiments, the generating module 610 is configured to determine, according to the ID1, a DMRS sequence of a first DMRS within one channel occupancy time, COT, of the unlicensed channel; determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of the channel occupation time of the unlicensed channel; and generating a DMRS sequence of an nth DMRS within a channel occupancy time COT of the unlicensed channel based on the IDn, wherein n is a positive integer.

In some embodiments, the generation module 610 is configured to determine IDn according to the following functional relationship; IDn × S1+ ID 1; wherein S1 is the first step size and is a positive integer.

In some embodiments, the generating module 610 is configured to determine, according to the ID1, a DMRS sequence that occupies a DMRS transmitted within a 1 st COT and within a preset time period on an unlicensed channel; determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied sequence m of the COT in the preset time period; wherein m is a positive integer greater than 1; and determining the DMRS sequence of the DMRS transmitted in the mth COT on the occupied unlicensed channel according to the IDm.

In some embodiments, the generation module 610 is configured to determine IDm according to the following functional relationship; IDm × S2+ ID 1; wherein S2 is the second step size and is a positive integer.

a generating module 610 configured to determine an IDf according to a physical downlink control channel PDCCH associated with the first type of DMRS, and determine a first type of DMRS sequence according to the IDf; the first-type DMRS is used for demodulating signaling carried on the PDCCH associated with the first-type DMRS; the different types of PDCCH are associated with different idfs, where f is a positive integer less than or equal to Y.

In some embodiments, the generating module is further configured to determine IDv based on the IDf and k; the k is as follows: the number of time domain units spaced between the transmission resources of the first DMRS and the second DMRS; and generating a DMRS sequence of the second DMRS type based on IDv.

In some embodiments, a generation module configured to determine IDv according to the functional relationship; IDv ═ k × S3+ IDf; wherein S3 is the third step length and is a positive integer.

In some embodiments, the transmitting module is further configured as a broadcasting module configured to broadcast, within an occupied p-th COT, a first ID for use within L1 COTs after the p-th COT; wherein the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l1 is a positive integer; p is a positive integer; or, the transmitting module is further configured to generate a second ID used by L2 DMRS sequences after broadcasting after the first DMRS is transmitted in one COT; wherein the second ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l2 is a positive integer.

As shown in fig. 10, an embodiment of the present application further provides a demodulation reference signal DMRS processing apparatus, where the demodulation reference signal DMRS processing apparatus includes:

an obtaining module 710 configured to obtain a DMRS sequence determined according to an identification ID of a reference time domain unit;

a receiving module 720 configured to receive the DMRS on an unlicensed channel;

a demodulation module 730 configured to demodulate the received DMRS according to the DMRS sequence.

In some embodiments, the obtaining module 710, the receiving module 720 and the demodulating module 730 may all be program modules. The program modules, when executed by the processor, enable DMRS sequence generation, DMRS reception, and demodulation.

In other embodiments, the obtaining module 710, the receiving module 720 and the demodulating module 730 can be all soft and hard combining modules, including but not limited to programmable arrays, which can be field programmable arrays or complex programmable arrays.

In other embodiments, the obtaining module 710, the receiving module 720 and the demodulating module 730 may be all soft and hard combining modules, including but not limited to: a field programmable array or a complex programmable array.

In some embodiments, the ID of the reference time-domain unit comprises: an ID1 of a reference time domain unit; an obtaining module 710 configured to determine a plurality of DMRS sequences according to the ID 1.

In some embodiments, the obtaining module 710 is configured to determine, according to the ID1, a DMRS sequence of a first DMRS within one channel occupancy time, COT, of the unlicensed channel; determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of the channel occupation time of the unlicensed channel; and determining a DMRS sequence of an nth DMRS within a channel occupancy time COT of the unlicensed channel based on the IDn, wherein n is a positive integer.

In some embodiments, the obtaining module 710 is configured to determine IDn according to the following functional relationship; IDn × S1+ ID 1; wherein S1 is the first step size and is a positive integer.

In some embodiments, the obtaining module 710 is configured to determine, according to the ID1, a DMRS sequence that occupies a DMRS transmitted within the 1 st COT and is within a preset time period on an unlicensed channel; determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied sequence m of the COT in the preset time period; wherein m is a positive integer greater than 1; and determining the DMRS sequence of the DMRS transmitted in the mth COT on the occupied unlicensed channel according to the IDm.

In some embodiments, the obtaining module 710 is configured to determine IDm according to the following functional relationship; IDm × S2+ ID 1; wherein S2 is the second step size and is a positive integer.

an obtaining module 710 configured to determine an IDf according to a physical downlink control channel PDCCH associated with the first type of DMRS, and determine a first type of DMRS sequence according to the IDf; the first-type DMRS is used for demodulating signaling carried on the PDCCH associated with the first-type DMRS; the different types of PDCCH are associated with different idfs, where f is a positive integer less than or equal to Y.

In some embodiments, the obtaining module 710 is further configured to determine IDv based on k; the k is as follows: the number of time domain units spaced between the transmission resources of the first DMRS and the second DMRS; and generating a DMRS sequence of the second DMRS type based on IDv.

In some embodiments, the obtaining module 710 is further configured to determine IDv according to the following functional relationship; IDv ═ k × S3+ IDf; wherein S3 is the third step length and is a positive integer.

In some embodiments, the receiving unit is further configured to receive a first ID within a p-th COT occupied by the base station, where the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit;

an obtaining module configured to generate, according to the first ID, a DMRS sequence for demodulating a DMRS within L1 COTs after the p-th COT, wherein L1 is a positive integer; p is a positive integer.

In some embodiments, the receiving module is further configured to receive a second ID used by the base station to generate L2 DMRS sequences after the base station transmits the first DMRS within one COT; wherein the second ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l2 is a positive integer; the obtaining module 710 is further configured to determine, according to the second ID, DMRS sequences L2 times after demodulation of the first DMRS for demodulation of the DMRS.

The embodiment of the present disclosure provides a communication device, including:

a transceiver;

a memory;

and a processor, respectively connected to the transceiver and the memory, for controlling wireless signal transceiving of the transceiver by executing computer-executable instructions stored in the memory, and implementing the DMRS processing method provided by any of the foregoing technical solutions, for example, performing at least one of the methods shown in fig. 2 to 4.

The disclosed embodiments provide a computer non-transitory storage medium, wherein the computer non-transitory storage medium stores computer executable instructions; the computer executable instructions, when executed by the processor, can implement the DMRS processing method provided by any of the preceding claims, for example, perform at least one of the methods shown in fig. 2 to 4.

Fig. 11 illustrates a UE that may be embodied as a mobile phone, computer, digital broadcast UE, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, or the like, according to an example embodiment.

Referring to fig. 11, a UE800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the UE800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the UE 800. Examples of such data include instructions for any application or method operating on the UE800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power component 806 provides power to various components of UE 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for UE 800.

The multimedia component 808 includes a screen that provides an output interface between the UE800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the UE800 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the UE800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 814 includes one or more sensors for providing various aspects of state assessment for the UE 800. For example, the sensor component 814 may detect an open/closed status of the UE800, the relative positioning of components, such as a display and keypad of the UE800, the sensor component 814 may also detect a change in the position of the UE800 or a component of the UE800, the presence or absence of user contact with the UE800, the orientation or acceleration/deceleration of the UE800, and a change in the temperature of the UE 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the UE800 and other devices in a wired or wireless manner. The UE800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, communications component 816 further includes a Near Field Communications (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the UE800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the UE800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Fig. 12 is a schematic diagram of a base station. Referring to fig. 12, base station 900 includes a processing component 922, which further includes one or more processors and memory resources, represented by memory 932, for storing instructions, e.g., applications, that are executable by processing component 922. The application programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, processing component 922 is configured to execute instructions to perform the PDCCH monitoring methods illustrated in fig. 4 and/or fig. 5.

The base station 900 may also include a power supply component 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input/output (I/O) interface 958. The base station 900 may operate based on an operating system stored in memory 932, such as Windows Server (TM), Mac OS XTM, Unix (TM), Linux (TM), Free BSDTM, or the like.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A DMRS processing method for demodulation reference signals is applied to a base station, and comprises the following steps:

generating a DMRS sequence according to the identification ID of the reference time domain unit; wherein the ID of the reference time domain unit comprises: an ID of one of the reference time domain units or IDs of Y reference time domain units, wherein Y is a positive integer equal to or greater than 2; the IDs of the reference time domain units are Y, and the IDs of different reference time domain units are different; the generating of the DMRS sequence according to the identifier ID of the reference time domain unit includes: determining a DMRS sequence of the DMRS according to the ID before an unlicensed channel is occupied;

2. The method of claim 1, wherein the ID of the one reference time domain unit is ID 1;

the determining the DMRS sequence of the DMRS according to the ID1 before occupying the unlicensed channel comprises the following steps:

determining a plurality of the DMRS sequences from the ID1 prior to camping on an unlicensed channel.

3. The method of claim 2, wherein,

the determining a plurality of the DMRS sequences from the ID1 includes:

determining a DMRS sequence of a first DMRS within a Channel Occupancy Time (COT) of the unlicensed channel according to the ID 1;

determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of one channel occupation time of the unlicensed channel; and generating the DMRS sequence of the nth DMRS within the COT of the unlicensed channel based on IDn, wherein n is a positive integer.

4. The method of claim 3, wherein the determining IDn from the ID1 and a transmission order n of the DMRS within one channel occupancy time, COT, of the unlicensed channel comprises: determining the IDn according to the following functional relationship; IDn × S1+ ID 1; wherein S1 is the first step length and is a positive integer.

5. The method of claim 2, wherein the determining the plurality of DMRS sequences from the ID1 comprises:

determining a DMRS sequence of the DMRS which is transmitted in the 1 st COT and is occupied in a preset time period on the unlicensed channel according to the ID 1;

determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied sequence m of COTs in a preset time period; wherein m is a positive integer greater than 1; and determining the DMRS sequence of the DMRS transmitted in the mth COT on the occupied unlicensed channel according to the IDm.

6. The method of claim 5, wherein the determining the IDm of the mth COT on the unlicensed channel occupied according to the ID1 and an occupation order m of COTs within a preset time period comprises: determining the IDm according to the following functional relationship; IDm × S2+ ID 1; wherein S2 is the second step size and is a positive integer.

7. The method of claim 1, wherein an IDy of a yth one of the reference time domain units is determined based on a 1st one of the reference time domain unit IDs 1; y is a positive integer less than or equal to Y;

the determining the DMRS sequence of the DMRS according to the ID comprises: determining IDf according to a Physical Downlink Control Channel (PDCCH) associated with a first type DMRS, and determining a DMRS sequence of the first type according to the IDf; the first DMRS is used for demodulating signaling carried on the PDCCH associated with the first DMRS; the IDf of the PDCCH associations of different types is different, the f is a positive integer less than or equal to Y.

8. The method of claim 7, wherein the determining the DMRS sequence of the DMRS from the ID comprises:

determining IDv according to the IDf and k; the k is as follows: the number of time domain units spaced between the transmission resources of the first DMRS and the second DMRS;

generating the DMRS sequence of the second DMRS type based on the IDv.

9. The method of claim 8, wherein said determining IDv from said IDf and k comprises:

determining IDv according to the following functional relationship; IDv ═ k × S3+ IDf; wherein S3 is the third step length and is a positive integer.

10. The method of any of claims 1 to 9, wherein the method further comprises:

broadcasting a first ID for use in L1 COTs after the p COT within the occupied p COT; wherein the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l1 is a positive integer; p is a positive integer;

alternatively, the first and second electrodes may be,

after transmitting the first DMRS within one COT, L2 DMRS sequences after broadcasting generate a second ID used; wherein the second ID is an ID of the reference time-domain unit or an ID generated based on the ID of the reference time-domain unit; the L2 is a positive integer.

11. A DMRS processing method for demodulation reference signals is applied to a terminal, and comprises the following steps:

acquiring a DMRS sequence determined according to the identification ID of the reference time domain unit; wherein the ID of the reference time domain unit comprises: an ID of one of the reference time domain units or IDs of Y reference time domain units, wherein Y is a positive integer equal to or greater than 2; the IDs of the reference time domain units are Y, and the IDs of different reference time domain units are different;

receiving a DMRS on an unlicensed channel;

demodulating the received DMRS according to the DMRS sequence.

12. The method of claim 11, wherein the ID of the one reference time domain unit is ID 1;

the acquiring of the DMRS sequence determined according to the identifier ID of the reference time domain unit includes:

determining a plurality of the DMRS sequences from the ID 1.

13. The method of claim 12, wherein the determining the plurality of DMRS sequences according to the ID1 comprises:

determining a DMRS sequence of a first DMRS in a COT (channel occupancy time) of the unlicensed channel according to the ID 1;

determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of one channel occupation time of the unlicensed channel; and determining the DMRS sequence of the nth DMRS within the COT (channel occupancy time) of the unlicensed channel based on IDn, wherein n is a positive integer.

14. The method of claim 13, wherein the determining IDn from the ID1 and a transmission order n of the DMRS within one channel occupancy time, COT, of the unlicensed channel comprises: determining the IDn according to the following functional relationship; IDn × S1+ ID 1; wherein S1 is the first step length and is a positive integer.

15. The method of claim 12, wherein the determining the plurality of DMRS sequences according to the ID1 comprises:

determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied order m of the COTs in the preset time period; wherein m is a positive integer greater than 1; determining, according to the IDm, a DMRS sequence of the DMRS transmitted within an mth COT on the unlicensed channel that is occupied.

16. The method of claim 15, wherein the determining IDm of mth COT on the unlicensed channel occupied according to the ID1 and an occupation order m of COTs within the preset time period comprises: determining the IDm according to the following functional relationship; IDm × S2+ ID 1; wherein S2 is the second step size and is a positive integer.

17. The method of claim 11, wherein IDy of the yth reference time-domain unit is determined based on the 1 st reference time-domain unit ID 1; y is a positive integer less than or equal to Y;

the acquiring the DMRS sequence determined according to the identifier ID of the reference time domain unit further includes:

determining IDf according to a Physical Downlink Control Channel (PDCCH) associated with a first type DMRS, and determining a DMRS sequence of the first type according to the IDf; the first DMRS is used for demodulating signaling carried on the PDCCH associated with the first DMRS; the IDf of the PDCCH associations of different types is different, the f is a positive integer less than or equal to Y.

18. The method of claim 17, wherein the obtaining the DMRS sequence determined according to the identification, ID, of the reference time domain element comprises:

determining, based on the IDv, a DMRS sequence of the second DMRS type.

19. The method of claim 18, wherein said determining IDv from said IDf and k comprises:

20. The method of any of claims 11 to 19, wherein the method further comprises:

receiving a first ID in a p-th COT occupied by a base station, wherein the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit;

generating the DMRS sequence that demodulates the DMRS within L1 COTs after the p-th COT according to the first ID, wherein L1 is a positive integer; and p is a positive integer.

21. The method of any of claims 11 to 19, wherein the method further comprises:

receiving a second ID used by L2 DMRS sequences generated after a base station transmits a first DMRS in a COT; wherein the second ID is an ID of the reference time-domain unit or an ID generated based on the ID of the reference time-domain unit; l2 is a positive integer;

determining the L2 DMRS sequences used for demodulating the DMRS after demodulating the first DMRS according to the second ID.

22. A demodulation reference signal (DMRS) processing device is applied to a base station and comprises the following components:

a generating module configured to generate a DMRS sequence according to the identification ID of the reference time domain unit; wherein the ID of the reference time domain unit comprises: an ID of one of the reference time domain units or IDs of Y reference time domain units, wherein Y is a positive integer equal to or greater than 2; the IDs of the reference time domain units are Y, and the IDs of different reference time domain units are different; wherein the generation module is configured to determine the DMRS sequence of the DMRS according to the ID before occupying an unlicensed channel;

23. The apparatus of claim 22, wherein the ID of the one reference time domain unit is ID 1;

the generating module is configured to determine a plurality of the DMRS sequences according to the ID1 before camping on an unlicensed channel.

24. The apparatus of claim 23, wherein the generating module is configured to determine, from the ID1, a DMRS sequence for a first one of the DMRS within a channel occupancy time, COT, of the unlicensed channel; determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of one channel occupation time of the unlicensed channel; and generating the DMRS sequence of the nth DMRS within the COT of the unlicensed channel based on IDn, wherein n is a positive integer.

25. The apparatus of claim 22, wherein an IDy of a yth one of the reference time domain units is determined based on a 1st one of the reference time domain unit IDs 1; y is a positive integer less than or equal to Y, which is a positive integer equal to or greater than 2;

the generation module is configured to determine an IDf according to a Physical Downlink Control Channel (PDCCH) associated with a first type of DMRS, and determine a DMRS sequence of the first type according to the IDf; the first DMRS is used for demodulating signaling carried on the PDCCH associated with the first DMRS; the IDf of the PDCCH associations of different types is different, the f is a positive integer less than or equal to Y.

26. The apparatus of claim 25, wherein the generation module is further configured to determine IDv based on the IDf and k; the k is as follows: the number of time domain units spaced between the transmission resources of the first DMRS and the second DMRS; generating the DMRS sequence of the second DMRS type based on the IDv.

27. The apparatus of any one of claims 22 to 26, wherein the transmitting means is further configured to broadcast, within an occupied p-th COT, a first ID for use within L1 COTs after the p-th COT; wherein the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit; l1 is a positive integer; p is a positive integer;

alternatively, the first and second electrodes may be,

the transmitting module is further configured to generate a second ID used by L2 DMRS sequences after broadcasting after transmitting the first DMRS within one COT; wherein the second ID is an ID of the reference time-domain unit or an ID generated based on the ID of the reference time-domain unit; the L2 is a positive integer.

28. A demodulation reference signal (DMRS) processing device is applied to a terminal, and comprises the following components:

an obtaining module configured to obtain a DMRS sequence determined according to an identification ID of a reference time domain unit; wherein the ID of the reference time domain unit comprises: an ID of one of the reference time domain units or IDs of Y reference time domain units, wherein Y is a positive integer equal to or greater than 2; the IDs of the reference time domain units are Y, and the IDs of different reference time domain units are different;

a receiving module configured to receive a DMRS on an unlicensed channel;

29. The apparatus of claim 28, wherein the ID of the one reference time domain unit is ID 1;

the obtaining module is configured to determine the plurality of DMRS sequences according to the ID 1.

30. The apparatus of claim 29, wherein the obtaining module is configured to determine, according to the ID1, a DMRS sequence for a first one of the DMRS within a channel occupancy time, COT, of the unlicensed channel; determining IDn according to the ID1 and the transmission sequence n of the DMRS in the COT of one channel occupation time of the unlicensed channel; and determining the DMRS sequence of the nth DMRS within the COT (channel occupancy time) of the unlicensed channel based on IDn, wherein n is a positive integer.

31. The apparatus of claim 29, wherein the obtaining module is configured to determine, according to the ID1, a DMRS sequence of the DMRS that is transmitted within a 1 st COT that is occupied within a preset time period on the unlicensed channel; determining IDm of the mth COT on the occupied unauthorized channel according to the ID1 and the occupied order m of the COTs in the preset time period; wherein m is a positive integer greater than 1; determining, according to the IDm, a DMRS sequence of the DMRS transmitted within an mth COT on the unlicensed channel that is occupied.

32. The apparatus of claim 28, wherein an IDy of a yth one of the reference time domain units is determined based on a 1st one of the reference time domain unit IDs 1; y is a positive integer less than or equal to Y, which is a positive integer equal to or greater than 2;

the acquisition module is configured to determine an IDf according to a Physical Downlink Control Channel (PDCCH) associated with a first type of DMRS, and determine a DMRS sequence of the first type according to the IDf; the first DMRS is used for demodulating signaling carried on the PDCCH associated with the first DMRS; the IDf of the PDCCH associations of different types is different, the f is a positive integer less than or equal to Y.

33. The apparatus of claim 32, wherein the obtaining module is further configured to determine IDv based on IDf and k; the k is as follows: the number of time domain units spaced between the transmission resources of the first DMRS and the second DMRS; determining a DMRS sequence in the second DMRS type based on the IDv.

34. The apparatus of any one of claims 28 to 33, wherein the receiving unit is further configured to receive a first ID within a p-th COT occupied by a base station, wherein the first ID is an ID of the reference time domain unit or an ID generated based on the ID of the reference time domain unit;

the obtaining module is configured to determine, according to the first ID, the DMRS sequence to demodulate the DMRS within L1 COTs after the p-th COT, wherein L1 is a positive integer; and p is a positive integer.

35. The apparatus of any one of claims 28 to 33,

the receiving module is further configured to receive a second ID used by L2 DMRS sequences generated after a base station transmits a first DMRS in one COT; wherein the second ID is an ID of the reference time-domain unit or an ID generated based on the ID of the reference time-domain unit; l2 is a positive integer;

the obtaining module is further configured to determine, according to the second ID, L2 DMRS sequences used for demodulating the DMRS after the first DMRS is demodulated.

36. A communication device, comprising:

a transceiver;

a memory;

a processor, connected to the transceiver and the memory respectively, for controlling the transceiver to transmit and receive wireless signals by executing computer-executable instructions stored in the memory, and implementing the method provided in any one of claims 1 to 10 or 11 to 21.

37. A computer non-transitory storage medium having stored thereon computer-executable instructions; the computer-executable instructions, when executed by a processor, implement the method provided in any one of claims 1 to 10 or 11 to 21.