CN109756315B - Method for configuring reference signal, method and equipment for data transmission - Google Patents
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Abstract
The embodiment of the invention provides a method for configuring a reference signal, a method for transmitting data and equipment, wherein the method for configuring the reference signal comprises the following steps: configuring a reference signal; transmitting configuration information of a reference signal; the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet the corresponding relation. According to the method for configuring the reference signals, the reference signals are configured in the mode of configuring the first reference signals and the second reference signals, so that the number of available reference signals is greatly increased, namely the capacity of the reference signals is improved, preconditions are provided for data transmission based on the reference signals, the UE is informed of the configuration information of the reference signals, the UE can conveniently perform data transmission with the base station based on the configuration information, and reliable guarantees are provided for data transmission of the UE.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method for configuring a reference signal, a method for transmitting data, and a device for transmitting data.
Background
With the rapid development of the information industry, especially the growing demand from the mobile internet and internet of things (IoT, internet of things), the future mobile communication technology is challenged unprecedented. As per the international telecommunications union ITU report ITU-R M [ imt. Beyond 2020.Traffic ], it is expected that in 2020, mobile traffic will increase approximately 1000 times as compared to 2010 (4G age), the number of user equipment connections will also exceed 170 billions, and the number of connected devices will be even more dramatic as the vast number of IoT devices gradually penetrate into the mobile communication network. To address this unprecedented challenge, the communications industry and academia have developed a wide range of fifth generation mobile communication technology research (5G), oriented in the 2020 s. The framework and overall goals of future 5G have been discussed in ITU report ITU-R M [ imt.vision ], where the requirements expectations, application scenarios and important performance metrics of 5G are specified. For new demands in 5G, ITU's report ITU-RM [ imt.futurre TECHNOLOGY TRENDS ] provides information about technical trends for 5G, aiming at solving significant problems of significant improvement of system throughput, user experience consistency, scalability to support IoT, latency, energy efficiency, cost, network flexibility, support of emerging services, flexible spectrum utilization, etc.
The requirement for supporting large-connectivity machine-type communication (mctc) traffic is proposed in 5G, the connection density will reach millions of connections per square kilometer, which is far higher than the link density supported by the existing standard, and the existing orthogonal multiple access mode, such as the orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiple Access, OFDMA) technology, is limited by available time-frequency resources, so as to limit the number of available reference signals, and further limit the number of terminals that can be accessed, which cannot meet the requirement of millions of connections required by mctc in 5G.
To improve the capabilities of multiple access techniques, some Non-orthogonal multiple access (Non-orthogonal Multiple Access, noMA) techniques are proposed and discussed as potential 5G critical techniques in the 3GPP standard conference. Among these techniques are sparse code division multiple access (Sparse Code Multiple Access, SCMA), pattern defined multiple access (Pattern Defined Multiple Access, PDMA), multi-user shared access (Multi-user Shared Access, MUSA), and the like. These techniques are based on code division multiple access, and increase the number of access users by spreading, thereby losing a certain coding gain. Meanwhile, the technical scheme needs to define different codebooks or sequences according to different access user numbers, and the standardization difficulty is high. For the non-orthogonal multiple access technology, in order for the receiving end to successfully detect and decode the transmitted data streams from different terminals, it needs to be ensured that the receiving end can distinguish the channels from different terminals, and therefore different reference signals need to be allocated to different terminals, and the number of the reference signals directly limits the number of the terminals that can be accessed. If different terminals use the same or less orthogonal reference signals, the detection performance may be significantly reduced, and even the base station may not distinguish the terminals.
The existing reference signal configuration mode in LTE cannot provide an effective and sufficient number of reference signals for an orthogonal multiple access technology or a non-orthogonal multiple access technology, so that the number of terminals that can be accessed is limited. There is therefore a need for an efficient way to increase the capacity of reference signals, i.e. to increase the number of available reference signals.
Disclosure of Invention
The object of the present invention is to solve at least one of the above technical drawbacks, in particular the technical drawback of not being able to provide an efficient and sufficient number of reference signals for non-orthogonal multiple access techniques.
According to one aspect, an embodiment of the present invention provides a method of configuring a reference signal, including:
configuring a reference signal;
transmitting configuration information of the reference signal;
the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet the corresponding relation.
According to another aspect, an embodiment of the present invention further provides a method for data transmission, including:
receiving configuration information of reference signals from a base station, wherein the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet a corresponding relation;
And determining a first reference signal and a second reference signal according to the configuration information, and carrying out data transmission with the base station based on the first reference signal and the second reference signal.
According to another aspect, an embodiment of the present invention further provides a base station, including:
a configuration module for configuring a reference signal;
a transmitting module, configured to transmit configuration information of the reference signal;
the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet the corresponding relation.
According to another aspect, an embodiment of the present invention further provides a terminal, including:
the receiving module is used for receiving configuration information of reference signals from a base station, wherein the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet a corresponding relation;
and the transmission module is used for determining a first reference signal and a second reference signal according to the configuration information, and carrying out data transmission with the base station based on the first reference signal and the second reference signal.
According to another aspect, an embodiment of the present invention further provides a base station apparatus, including: a processor; and
A memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of configuring a reference signal described above.
According to another aspect, an embodiment of the present invention further provides a terminal device, including:
a processor; and
a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of data transmission described above.
According to the method for configuring the reference signals, the reference signals are configured, the reference signals comprise the first reference signals and the second reference signals, the first reference signals and the second reference signals meet the corresponding relation, the reference signals are configured in a mode of configuring the first reference signals and the second reference signals, so that the number of available reference signals is greatly increased, namely the capacity of the reference signals is improved, preconditions are provided for data transmission based on the reference signals, configuration information of the reference signals is sent, namely the configuration information of the reference signals is notified to UE, and therefore the UE can conveniently perform data transmission based on the configuration information and a base station, namely reliable guarantees are provided for data transmission of the UE.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for configuring reference signals according to an embodiment of the invention;
fig. 2 is a schematic flow chart of configuring a primary reference signal and an auxiliary reference signal at a base station side according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a reference signal according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a main reference signal according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an auxiliary reference signal according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a possible correspondence between a primary reference signal and a secondary reference signal according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a time-frequency resource location of a possible auxiliary reference signal according to an embodiment of the present invention;
fig. 8 is a schematic diagram of time-frequency resource positions of different auxiliary reference signals when the maximum number of terminals that can be carried in the embodiment of the present invention is different;
FIG. 9 is a data detection flow according to an embodiment of the present invention;
Fig. 10 is a flowchart of a method for uplink transmission according to another embodiment of the present invention;
fig. 11 is a schematic diagram of the basic structure of a base station according to another embodiment of the present invention;
fig. 12 is a schematic view of a basic structure of a terminal according to another embodiment of the present invention;
fig. 13 is a block diagram of a computing system that may be used to implement a base station or user equipment disclosed in an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, a "terminal" or "terminal device" includes both a device of a wireless signal receiver having no transmitting capability and a device of receiving and transmitting hardware having receiving and transmitting hardware capable of bi-directional communication over a bi-directional communication link, as will be appreciated by those skilled in the art. Such a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; a PCS (Personal Communications Service, personal communication system) that may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (Personal Digital Assistant ) that can include a radio frequency receiver, pager, internet/intranet access, web browser, notepad, calendar and/or GPS (Global Positioning System ) receiver; a conventional laptop and/or palmtop computer or other appliance that has and/or includes a radio frequency receiver. As used herein, "terminal," "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or adapted and/or configured to operate locally and/or in a distributed fashion, to operate at any other location(s) on earth and/or in space. The "terminal" and "terminal device" used herein may also be a communication terminal, a network access terminal, and a music/video playing terminal, for example, may be a PDA, a MID (Mobile Internet Device ), and/or a mobile phone with a music/video playing function, and may also be a smart tv, a set top box, and other devices.
Currently, LTE adopts an orthogonal reference signal design, i.e. reference signals allocated to different terminals use mutually orthogonal time-frequency resources or mutually orthogonal reference signal sequences. For example, the reference signal in the LTE-a downlink transmission uses orthogonal cover codes with shorter length and time frequency resources that are orthogonal to each other; the uplink reference signals use mutually orthogonal sequences to distinguish between different reference signals. Orthogonal reference signals can provide better channel estimation accuracy, but due to the limited number of orthogonal resources, orthogonal reference signals cannot provide a sufficient number of reference signals.
The non-orthogonal reference signals include using a sequence having poor orthogonality (poor sequence correlation) as a reference signal, for example, using a PN sequence or the like; or using the pilot frequency as a data layer, and performing channel estimation and data detection decoding through iterative channel estimation and decoding detection at the base station side. The number of non-orthogonal reference signals is not limited by the limitation of orthogonal resources, and thus the number of reference signals that can be provided can be significantly increased. But is limited by the non-orthogonal nature, the use of non-orthogonal reference signals will have an impact on the accuracy of the channel estimation and thus on the performance of the data detection.
Thus, LTE existing reference signals cannot provide sufficient reference signal capacity, resulting in reference signals that would be a bottleneck in research for non-orthogonal multiple access techniques.
In order to solve the problem, the embodiment of the invention provides a design mode of a reference signal, and combines the design characteristics of orthogonal and non-orthogonal reference signals to design the reference signal for a non-orthogonal multiple access technology; meanwhile, the related signaling is designed to inform the corresponding reference signal allocation.
Specifically, one embodiment of the present invention provides a method for configuring a reference signal, as shown in fig. 1, including: step 110: configuring a reference signal; step 120: transmitting configuration information of a reference signal; the reference signals include a first reference signal and a second reference signal, and the first reference signal and the second reference signal satisfy a correspondence therebetween.
The method for configuring the reference signals provided by the embodiment of the invention configures the reference signals, wherein the reference signals comprise the first reference signals and the second reference signals, the corresponding relation between the first reference signals and the second reference signals is met, and the reference signals are configured in a mode of configuring the first reference signals and the second reference signals, so that the number of available reference signals is greatly increased, namely the capacity of the reference signals is improved, preconditions are provided for the subsequent data transmission based on the reference signals, the configuration information of the reference signals is sent, namely the configuration information of the reference signals is notified to the UE, so that the UE can conveniently perform data transmission based on the configuration information and the base station, namely reliable guarantees are provided for the data transmission of the UE.
In addition, by adopting the method provided by the embodiment of the invention, the accuracy of channel estimation, the cost of the reference signals and the capacity of the reference signals can be considered, and the channel estimation which is as accurate as possible can be provided under the condition of providing the acceptable number of the reference signals. In addition, the method for configuring the reference signal provided by the embodiment of the invention can be suitable for the condition of carrying the change of the terminal number, and has certain flexibility.
Preferably, the first reference signal is a quadrature signal or a non-quadrature signal; and/or the second reference signal is a quadrature signal.
Preferably, the second reference signal is discrete or sequential.
Preferably, the distinguishing manner of the discrete second reference signals includes at least one of the following: a frequency division mode, a time division mode, and a code division mode; the distinguishing manner of the second reference signals of the sequence type comprises at least one of the following: frequency division mode, time division mode, code division mode, cyclic shift and comb structure.
Preferably, the correspondence relationship includes: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
Preferably, configuring the reference signal includes: configuring a reference signal resource pool; the configuration information of the transmitted reference signal includes: and sending configuration information of the reference signal resource pool.
Preferably, the configuration information of the reference signal includes: the characteristic-related parameter of the first reference signal, the characteristic-related parameter of the second reference signal, and correspondence information between the first reference signal and the second reference signal.
Preferably, the first reference signal characteristic-related parameter comprises at least one of: cyclic shift of sequences, comb structure, orthogonal cover code words; and/or, when the second reference signal is a discrete reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resources or time-frequency resource allocation information, orthogonal cover code words; when the second reference signal is a sequential reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resource, cyclic shift of sequence, comb structure and orthogonal cover code word.
Preferably, transmitting the configuration information of the reference signal includes: informing the configuration information of the reference signal by any one of the following modes: index, index combination, index table and index combination.
Preferably, the reference signal configuration information is different depending on the number of UEs that can be carried or the number of ports currently used.
Preferably, the method further comprises: the number of UEs capable of carrying or the number of ports currently used is notified.
Preferably, the method further comprises: configuring the corresponding relation between the reference signal and the multiple access resource; the corresponding relation between the reference signal and the multiple access resource comprises the corresponding relation among the first reference signal, the second reference signal and the multiple access resource.
Preferably, the correspondence between the reference signal and the multiple access resource includes: the first reference signal corresponds to first multiple access resource information and the second reference signal corresponds to second access resource information.
Preferably, the first multiple access resource information includes a bit-level interleaver, and the second access resource information includes a trellis mapping pattern; alternatively, the first multiple access resource information includes a grid mapping pattern and the second access resource information includes a bit-level interleaver.
Preferably, configuring the correspondence between the reference signals and the multiple access resources includes: calculating a reference signal index according to the first reference signal index and the second reference signal index; and configuring the corresponding relation between the reference signal index and the multiple access resource.
Preferably, the method further comprises: configuring a multiple access resource pool and sending configuration information of the multiple access resource pool; the multiple access resource pool includes any of the following cases: a non-orthogonal multiple access time-frequency resource set and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource set; an orthogonal multiple access time-frequency resource set and the corresponding relation between the reference signal and the orthogonal multiple access time-frequency resource set; the method comprises the steps of non-orthogonal multiple access time-frequency resource set, orthogonal multiple access time-frequency resource set and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource set and the orthogonal multiple access time-frequency resource set.
Preferably, the reference signal resource pool is configured, including any one of the following cases: configuring different first reference signals; configuring the same first reference signal and different second reference signals; configuring different first reference signals and the same second reference signals; different first reference signals and different second reference signals are configured.
Preferably, when the first reference signal occupies a plurality of symbols, the manner of generating the first reference signal includes any of the following cases: configuring different sequences for each symbol respectively, and generating a plurality of first reference signals through the combination of different inter-symbol sequences; configuring a sequence for a plurality of symbols and generating a first reference signal from the sequence; a sequence is configured for a plurality of symbols and a plurality of first reference signals are generated by means of code division.
It should be noted that, the first reference signal may be specifically a primary reference signal, the second reference signal may be specifically an auxiliary reference signal, the configuration reference signal includes a configuration reference signal resource pool, and the configuration information of the transmission reference signal includes configuration information of the transmission reference signal resource pool.
Aiming at the design problem of the reference signal in 5G, the embodiment of the invention provides a design mode of the reference signal, which comprises the following steps:
the base station configures a primary reference signal and a secondary reference signal, respectively, that is, the base station configures a reference signal resource pool.
The base station sends the configuration information of the main reference signal and the auxiliary reference signal to the terminal through a high-layer signaling or a downlink control signaling, namely, the base station sends the configuration information of the reference signal resource pool.
The base station detects the reference signal according to the configuration of the reference signal and the allocation of the time frequency resource so as to perform channel estimation.
The above flow is shown in fig. 2.
The above-described embodiments of the present invention are described in full detail below by way of several preferred implementations:
embodiment one:
in the first embodiment, configuring the reference signal includes configuring a reference signal resource pool, the reference signal includes a first reference signal and a second reference signal, and a correspondence relationship is satisfied between the first reference signal and the second reference signal; the first reference signal is a quadrature signal or a non-quadrature signal; and/or the second reference signal is a quadrature signal; the second reference signal may be a discrete reference signal or a sequential reference signal; wherein the second reference signal of the discrete type can be distinguished based on at least one of a frequency division mode, a time division mode and a code division mode, and the second reference signal of the sequence type can be distinguished based on at least one of a frequency division mode, a time division mode, a code division mode, a cyclic shift and a comb structure; the correspondence satisfied between the first reference signal and the second reference signal includes: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
In the first embodiment, a design method of the reference signal will be described with reference to a specific system. In the first embodiment, it is assumed that the system adopts a non-orthogonal multiple access technology, that is, different terminals use non-orthogonal or incompletely orthogonal time-frequency resources or other multiple access resources for uplink data transmission or downlink data reception. Meanwhile, it is assumed that a terminal needs to transmit uplink data, and a base station serves a plurality of terminals on the same time-frequency resource.
In the method provided in the first embodiment, the reference signal is mapped in two parts. The first part uses sequential reference signals, i.e. different sequences are used for distinguishing between different terminals. The other part is the auxiliary reference signal, which occupies the time-frequency resource in a discrete or continuous mode, that is, the auxiliary reference signal may be a discrete auxiliary reference signal, occupy the time-frequency resource in a frequency domain discrete or time domain discrete mode, or may be a sequential auxiliary reference signal, and occupy the time-frequency resource in a frequency domain continuous mode, wherein in the first embodiment, the discrete auxiliary reference signal is described in detail as an example. A schematic diagram of the reference signals for these two parts is shown in fig. 3.
The first reference signal, called the primary reference signal, may be located at the front, middle or tail of a time unit (such as a subframe, a slot or a mini-slot). Taking the example of being located in front of the time unit, the main reference signal occupies k symbols, where k is not less than 1, and occupies on each symbol the bandwidth that is fully allocated to the terminals of the non-orthogonal multiple access technology. If k is greater than 1, i.e. multiple symbols are allocated for the primary reference signal, the allocation may be as follows:
a. each symbol is a separate sequence, with multiple reference signals provided by a combination of different inter-symbol sequences. It should be noted that a transmission mode in which only one of the available symbols is occupied and the other symbols are empty is a specific example of this mode.
b. One of the sequences is mapped to a plurality of symbols, i.e., the time-frequency resources of the plurality of symbols are used to carry a sequence from which a primary reference signal is generated.
c. Orthogonality between sequences is provided by means of code division, i.e. multiple symbols transmit the same sequence, and different primary reference signals are provided by different orthogonal cover codewords.
Wherein fig. 4 gives a brief description of the above three allocation schemes.
In the method c in fig. 4, when only one symbol is used for a certain reference signal, the other symbol is null, but the symbol that is occupied by the other reference signal may be the same or different from the symbol that is occupied by the certain reference signal.
In addition, for the main reference signal, orthogonal or quasi-orthogonal sequences are used. For example, a Zadoff-Chu (ZC) sequence is adopted, and different cyclic shifts are used, so that a plurality of orthogonal sequences are provided by utilizing the characteristic that the ZC sequence and the cyclic shift thereof are mutually orthogonal; or using Pseudonoise (PN) sequences, using different cyclic shifts to provide multiple quasi-orthogonal sequences.
It should be noted that, the same or different primary reference signals may be allocated to different terminals based on the configured reference signal resource pool, and for the terminals allocated with the same primary reference signal, it is necessary to further distinguish channels by the secondary reference signals. The secondary reference signal may employ a discrete reference signal to reduce the overhead of the reference signal. The differentiation of the different reference signals may be performed using frequency and/or time and/or code division. Specifically, the different auxiliary reference signals may be provided in several ways:
a. Different auxiliary reference signals are distinguished in a frequency division and/or time division manner, for example, the different auxiliary reference signals occupy non-overlapping time-frequency resources.
b. The different auxiliary reference signals are distinguished in a time-and/or frequency-and/or code-division manner, i.e. the different auxiliary reference signals may use the same time-frequency resources but use different orthogonal cover code codewords that are orthogonal to each other.
The two ways of providing different auxiliary reference signals are shown in fig. 5, and the example shown in fig. 5 is an example when two auxiliary reference signals are provided. Wherein each auxiliary reference signal in pattern a uses one of two time-frequency resources; each auxiliary reference signal in the mode b occupies two time-frequency resources, but uses orthogonal cover code words which are orthogonal to each other, wherein one orthogonal cover code word is +1, +1; the other cover code codeword is +1, -1.
Each primary reference signal corresponds to a set of secondary reference signals, and the corresponding relationship may be a time-frequency resource or a combination of time-frequency resource and orthogonal cover code. For example, one possible correspondence is that one primary reference signal corresponds to one time-frequency resource combination, and the secondary reference signal thereon is used to distinguish between different channels; different primary reference signals correspond to non-overlapping time-frequency resources, and the secondary reference signal positions corresponding to other primary reference signals are null, i.e. are not used for data transmission and transmission. Fig. 6 is a schematic structural diagram of this mode.
Another possible correspondence is a combination of time-frequency resources and orthogonal cover code words for one primary reference signal. In this case, multiple primary reference signals may be mapped to the same time-frequency resource combination, and different secondary reference signals corresponding to the primary reference signals may need to be distinguished by the orthogonal cover code words or the orthogonal cover code word groups on the multiple primary reference signals, that is, the primary reference signals correspond to the secondary reference signals represented by using different orthogonal cover code words or the orthogonal cover code word groups. For example, the main reference signals 1 and 2 both correspond to the same time-frequency resource of the auxiliary reference signal, wherein the orthogonal cover code words corresponding to the main reference signal 1 are codewords 0-1, and the orthogonal cover code words corresponding to the main reference signal 2 are codewords 2-3. The other main reference signals correspond to the other, and the auxiliary reference signals are transmitted through other time-frequency resources which are not overlapped with the time-frequency resources of the auxiliary reference signals corresponding to the two main reference signals.
Other possible correspondence is that the auxiliary reference signals corresponding to the plurality of main reference signals use the same time-frequency resource, and different main reference signals correspond to non-overlapping orthogonal cover code word sets.
It should be noted that the above correspondence should be understood that the primary reference signal may determine a certain characteristic of the secondary reference signal, for example, time-frequency resources, orthogonal cover code words, and the like.
In addition to distinguishing discrete auxiliary reference signals by orthogonal cover codes, the auxiliary reference signals may also use sequential reference signals, where different auxiliary reference signals may be distinguished by cyclic shift, comb structures, etc. Compared with the scheme adopting the orthogonal cover code words, the orthogonal cover code words are replaced by cyclic shift and/or comb structure and/or orthogonal cover code words.
The number of terminals which can be borne by the system is adjusted by changing the number of auxiliary reference signals corresponding to the main reference signals, or the number of auxiliary reference signals corresponding to the main reference signals is changed according to the number of terminals which are required to be borne by the system, so that the number of available reference signals is adjusted. For example, when the number of terminals to be carried is small, the main reference signal can satisfy the number of terminals to be carried, no auxiliary reference signal is needed; when the number of required bearing terminals increases, when the number of the bearing terminals cannot be met by using the main reference signal alone, increasing the auxiliary reference signal to increase the number of available reference signals; as the number of terminals that need to be carried continues to increase, a larger capacity auxiliary reference signal is used to carry more terminals.
It should be noted that the above procedure may be implemented by measuring the load number of the access network, taking the load number as a threshold, and adjusting the configuration of the auxiliary reference signal according to the threshold. Specifically, a first threshold value of the network load number is set, and if the actual load number is lower than the first threshold value, only the main reference signal is configured; if the actual load number is not lower than the first threshold value and is lower than a second threshold value which is preset, configuring a main reference signal and an auxiliary reference signal; if the actual load number is not lower than the second threshold value and is lower than a preset third threshold value, configuring a main reference signal and auxiliary reference signals with higher density. And so on, different densities of auxiliary reference signals are configured for different numbers of network loads to carry different numbers of terminals.
The configuration content is configured through high-layer signaling or downlink control channels. Meanwhile, the above configuration content is applicable to the case of configuring reference signals for a single or a plurality of terminals.
Embodiment two:
in the second embodiment, the configuration information of the reference signal includes: the characteristic-related parameter of the first reference signal, the characteristic-related parameter of the second reference signal, and correspondence information between the first reference signal and the second reference signal. The first reference signal characteristic-related parameter includes at least one of: cyclic shift of sequences, comb structure, orthogonal cover code words; and/or, when the second reference signal is a discrete reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resources or time-frequency resource allocation information, orthogonal cover code words; when the second reference signal is a sequential reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resource, cyclic shift of sequence, comb structure and orthogonal cover code word. The configuration information of the transmitted reference signal includes: the configuration information of the reference signal is notified by any one of the following means: index, index combination, index table and index combination. Meanwhile, the reference signal configuration information is different depending on the number of UEs that can be carried or the number of ports currently used. When notifying the reference signal configuration information, the method further comprises notifying the number of the UE capable of bearing or the number of the ports currently used.
In the second embodiment, a design method of the reference signal will be described with reference to a specific system. In the second embodiment, the reference signal design manner described in the first embodiment is adopted, that is, the reference signal includes a main reference signal and an auxiliary reference signal. The second embodiment will describe notification and configuration when the reference signal design is adopted. The manner adopted in the second embodiment is also applicable to notification and configuration of the uplink reference signal and the downlink reference signal.
In the reference signal design manner provided by the embodiment of the invention, the reference signal comprises the main reference signal and the auxiliary reference signal, so that when the reference signal is configured, parameters to be configured comprise: the primary reference signal characteristic-related parameter and the secondary reference signal characteristic-related parameter.
Specifically, the primary reference signal characteristic-related parameter includes at least one of: the sequence cyclic shift used for the primary reference signal, the comb structure used, the orthogonal cover code words used. If there is only one symbol for transmission of the primary reference signal, a combination of the three may be used for indication of the primary reference signal characteristic related parameter. For example, an index table containing the above three characteristics is defined or configured (i.e., each index in the index table contains a combination of possible cyclic shifts, comb structures, orthogonal cover code words), and an index corresponding to each combination is defined, by which the primary reference signal is notified and configured. Other possible ways are that different characteristic-related parameters are configured and notified using separate index tables, respectively, i.e. each characteristic-related parameter corresponds to one index table, and the main reference signal is configured and notified by the index combination of the respective index tables.
If there are multiple symbols for transmission of the primary reference signal, the manner in which notification and configuration are required is also different depending on the primary reference signal structure selected. If the main reference signal is generated in a plurality of sequences, it is necessary to inform and configure the characteristic-related parameter of each sequence, that is, each sequence is configured using a separate index, for example, N indexes for the main reference signal composed of N sequences. Wherein, the characteristic-related parameters of the N sequences may also be described by using a unified index table, and at this time, each main reference signal uses one index to describe the characteristic-related parameters, in this configuration mode, only one index table for describing the characteristic-related parameters of the main reference signal may be defined, and each index in the index table includes a possible combination of cyclic shift, dressing structure, and orthogonal cover code words, and the characteristic-related parameters of each main reference signal are described by one index; in addition, a set of index tables for describing characteristic-related parameters of the sequence of the main reference signal may be defined, each index table for describing one characteristic-related parameter of the sequence used by the main reference signal, for example, index table 1 is defined for describing cyclic shift; defining an index table 2 for describing the comb structure; an index table 3 is defined for describing orthogonal cover code codewords. In notifying and configuring the main reference signal on each symbol, description of the characteristic-related parameter of the main reference signal is performed using an index group including the index in each index table. Meanwhile, a plurality of sequences constituting the main reference signal may also be described using N index groups.
If the main reference signal is generated by mapping a sequence to a plurality of symbols, only one or a group of index tables containing the relevant parameters of the characteristics of the main reference signal are required to be defined, and notification and configuration are performed by means of indexes or index groups.
If the main reference signal is generated by adopting a code division mode (namely adopting an orthogonal cover code word), an index table comprising the cyclic shift of the sequence used by the main reference signal, the comb structure used and the orthogonal cover code word used can be defined, and the main reference signal is notified and configured by adopting an index mode; other possible ways include: defining a plurality of index tables containing parameters describing characteristics of sequences used for the main reference signal, for example, defining an index table including cyclic shift and comb structure for describing characteristics of the main reference signal sequence, and defining an index table describing orthogonal cover codes for informing and configuring used orthogonal cover code words by using the index; for another example, each characteristic-related parameter is respectively informed and configured in an indexed manner using a separate index table, respectively, of the cyclic shift, comb structure, and orthogonal cover code codeword used.
The content to be notified of the secondary reference signal includes the correspondence between the secondary reference signal and the primary reference signal, and the characteristic-related parameters of the secondary reference signal. Considering that the overhead of the auxiliary reference signal may be different when carrying different numbers of terminals, the notification and configuration of the auxiliary reference signal need to consider the design of the auxiliary reference signal when carrying different numbers of terminals, that is, the configuration information of the reference signal is different due to different numbers of UEs that can be carried or the number of ports that are currently used.
A simpler way is to define only the secondary reference signal structure when the number of bearer terminals is maximum. For example, it is possible to configure the time-frequency resource locations of the corresponding secondary reference signals together when configuring the primary reference signals, and to separately configure and notify the characteristic-related parameters of the secondary reference signals. Since there may be multiple time-frequency resource locations for transmission of the secondary reference signal, it is necessary to define possible time-frequency resource locations in advance, and mark a number (or index) for each possible time-frequency resource location, and configure the time-frequency resource locations of the secondary reference signal corresponding to the primary reference signal together when configuring the primary reference signal.
Fig. 7 is one possible example of the above description.
In fig. 7, there are 4 possible time-frequency resource locations of the secondary reference signal in one time unit (e.g., a subframe or a slot or a mini-slot), and the numbers are given according to the time-priority principle (index 1 to index 4 in fig. 6). Considering that in the example shown in fig. 7, the time-frequency resource locations of each available secondary reference signal include two adjacent resource elements, the time-frequency resource locations of each secondary reference signal may support 4 different reference signals through orthogonal cover codes. It should be noted that, each auxiliary reference signal only uses one time-frequency resource position, and the unused time-frequency resource position is empty and is not used for data transmission.
For the way in which a single index notification and configuration of the primary reference signal sequence is employed, additional fields may be added to the index table for configuring the time-frequency resource locations of the secondary reference signals. Specifically, the index table includes the characteristic parameters of the main reference signal and the corresponding time-frequency resource position index of the auxiliary reference signal. Additional index tables may be used for configuration and notification of specific secondary reference signal characteristic related parameters (e.g., orthogonal cover code codewords). For example, a separate index table is used for configuration and notification of the orthogonal cover code codewords used.
In the above manner, the reference signals are configured and notified using two indexes (i.e., the primary reference signal index and the secondary reference signal index). The main reference signal index is used for configuring characteristic related parameters of a main reference signal and time-frequency resource positions of auxiliary reference signals corresponding to the main reference signal; the secondary reference signal index is used to configure characteristic-related parameters of the secondary reference signal, such as orthogonal cover code codewords.
By adopting the mode, no matter how the number of the carried terminals changes, the combination of the proper main reference signal and the auxiliary reference signal can be found to carry out the transmission of the reference signal and the channel estimation at the base station side, and meanwhile, the configuration and the notification are simpler. But this simple way will result in some waste on resource allocation. For example, as shown in fig. 7, the system carries a maximum of 16 terminals, and there are 4 primary reference signals, each corresponding to a time-frequency resource location of 1 secondary reference signal, while the time-frequency resource location of each secondary reference signal can support 4 secondary reference signals. Although the configuration mode can bear 16 terminals at most, when the system load is less and the requirements of the terminals can be met by only using the main reference signal, the time-frequency resource position of the auxiliary reference signal still needs to be reserved, which causes resource waste.
In order to reduce the waste of time-frequency resources, the number of time-frequency resources of the available auxiliary reference signals can be adjusted according to the number of terminals needed to be carried. Specifically, the time-frequency resource positions of different auxiliary reference signals are defined according to the maximum number of the terminals which can be carried. A simple example is shown in fig. 8.
In the example shown in fig. 8, when the number of terminals is smaller, the number of terminals to be carried on each time unit is smaller, and the example shown in a can be used for configuring the reference signal; when the number of terminals becomes larger, the number of auxiliary reference signals can be adjusted according to the number of terminals needed to be carried, and the configuration is carried out by using the example shown in b or c or d.
In the notification, the selection of the time-frequency resource position of the auxiliary reference signal is required to be performed according to the number of the carried terminals in the characteristic related parameters of the main reference signal. A simple example is shown in table 1.
Table 1: main reference signal index table schematic
In the example shown in table 1, max.2 and max.4 represent cases where the maximum number of bearer terminals is 2 and 4, respectively. When the maximum number of bearer terminals is 2, the requirement of the number of bearer terminals can be met by using only the main reference signal, so that the auxiliary reference signal is not needed. It should be noted that, the maximum number of bearer terminals may also be expressed by other related terms such as the number of ports. When notifying the reference signal configuration, the maximum number of bearer terminals or the number of ports, which are preconfigured by the base station, needs to be notified together.
In this way, when the orthogonal cover code word is configured, the orthogonal cover code word needs to be configured according to the maximum number of bearer terminals or the number of ports. A simple example is shown in table 2.
Table 2: orthogonal cover code codeword notification scheme
In the example shown in table 2, if the maximum number of bearer terminals, or the number of ports is 2, orthogonal cover codes are not required to be used; when the maximum number of bearer terminals increases, an orthogonal cover code word with length of 2 or an orthogonal cover code word with longer length is used. In the above manner, when the reference signal is notified and configured, the parameters to be transmitted include the primary reference signal index and the secondary reference signal index, and the maximum number of terminals or ports carried.
In another configuration and notification scheme, the index of the time-frequency resource location of the secondary reference signal is configured together with the index of the characteristic-related parameter of the secondary reference signal. I.e. an index table is pre-configured to describe the index of the time-frequency resource locations of the secondary reference signals and the orthogonal cover code codewords used. A simple example is shown in table 3.
Table 3: auxiliary reference signal index illustration
| Index | Time-frequency resource location | Orthogonal cover code words |
| 0 | 0 | [+1+1] |
| 1 | 0 | [+1-1] |
| 2 | 1 | [+1+1] |
| 3 | 1 | [+1-1] |
| … | … | … |
In table 3, the time-frequency resource position of the secondary reference signal is notified together with the orthogonal cover code.
Similar to the previous examples, the time-frequency resource location and characteristic related parameters of the secondary reference signal are determined by the maximum number of terminals, or ports, that can be carried. Namely, adding the time-frequency resource position of the auxiliary reference signal determined by the maximum number of the loadable terminals or the number of ports and the corresponding orthogonal cover code words into the same index table. A simple example is shown in table 4.
Table 4: determining auxiliary reference signals according to port numbers
Wherein, the situations of adopting auxiliary reference signals for different port numbers are different. For example, if the number of ports is 2, no auxiliary reference signal is used, i.e. no additional time-frequency resource position of the auxiliary reference signal is used; if the port number is 4, the time-frequency resource of each auxiliary reference signal comprises two resource elements, and the orthogonal cover code word with the length of 2 is used; if the number of ports is 8, the time-frequency resource of each auxiliary reference signal used comprises three resource elements, and the orthogonal cover code word with the length of 3 is used.
The above-described method is also applicable to a method of notifying and configuring a main reference signal by using an index group.
In the above notification and configuration method using the index table, the index table may be directly notified, or notification and configuration may be performed by means of the index table and the corresponding index or index combination. This approach, while more signaling overhead, has better configuration and notification flexibility. That is, in practical application, the configuration information of the reference signal can be notified by any one of the index, the index combination, the index table and the index combination according to the needs of the user.
In other notification and configuration modes, the related information of the time-frequency resource position of the auxiliary reference signal is independently notified. The related information may be configured by a pre-configured index table. For example, an index table containing relevant information of the time-frequency resource position is pre-configured, and the time-frequency resource position of the auxiliary reference signal of the terminal is indicated by informing the index; or the time-frequency resource position of the auxiliary reference signal is jointly determined according to the index and the port number (the maximum bearing terminal number).
This approach may be combined with terminal grouping to provide greater gain to the system. Specifically, the terminals are grouped according to the difference of the channel state information, the difference of the intra-group channel state information is small, and the difference of the inter-group channel state information is large. When the reference signals are allocated, the terminals of the same group use the same main reference signal, and the terminals in the group are distinguished by auxiliary reference signals.
In addition to the discrete auxiliary reference signals distinguished by the orthogonal cover code words, the auxiliary reference signals may also use sequential reference signals, in which case different auxiliary reference signals may be distinguished by cyclic shift, comb structure, orthogonal cover code, etc. Compared with the scheme adopting the orthogonal cover code words, the orthogonal cover code words are replaced by cyclic shift or comb structures or orthogonal cover codes or the combination of any two or the combination of the three.
In the foregoing configuration and notification manner, it is necessary to configure the correspondence between the primary reference signal and the secondary reference signal. The parameter for informing the correspondence between the primary reference signal and the secondary reference signal can be understood as correspondence information of the primary reference signal and the secondary reference signal.
In other notification and configuration modes, the primary reference signal and the secondary reference signal may be configured separately. Without informing and configuring the correspondence between the primary reference signal and the secondary reference signal. The configuration of the main reference signal and the auxiliary reference signal may be the same as that described in the embodiment.
The configuration information can be configured through higher layer signaling or downlink control information. The above configuration content is applicable to the case of configuring reference signals for a single or a plurality of terminals.
Embodiment III:
in the third embodiment, a correspondence between the reference signal and the multiple access resource is configured; the corresponding relation between the reference signal and the multiple access resource comprises the corresponding relation among the first reference signal, the second reference signal and the multiple access resource. The corresponding relation between the reference signal and the multiple access resource comprises: the first reference signal corresponds to first multiple access resource information and the second reference signal corresponds to second access resource information. The first multiple access resource information includes a bit level interleaver and the second access resource information includes a grid mapping pattern; alternatively, the first multiple access resource information includes a grid mapping pattern and the second access resource information includes a bit-level interleaver. Configuring the corresponding relation between the reference signal and the multiple access resource comprises the following steps: calculating a reference signal index according to the first reference signal index and the second reference signal index; and configuring the corresponding relation between the reference signal index and the multiple access resource.
In the third embodiment, a design method of a reference signal suitable for a non-orthogonal multiple access technology will be described with reference to a specific system. In this embodiment, it is assumed that the system uses a non-orthogonal multiple access technology in uplink data transmission, and allocates dedicated time-frequency resources of the non-orthogonal multiple access technology. That is, the system allocates dedicated resources on which a plurality of terminals transmit and receive data using a non-orthogonal multiple access technique.
The uplink data transmission using the non-orthogonal multiple access technique may use either a scheduling-based data transmission or a scheduling-free data transmission. If the scheduling-free data transmission is adopted, the base station needs to perform blind detection on the received signals so as to determine the terminals for transmitting the data and the data transmitted by the terminals. In order to simplify the blind detection process at the base station side, a corresponding relationship needs to be established between the reference signal and the multiple access resource. The base station determines the reference signals used by the terminals by performing energy detection on the reference signals, and can then determine the multiple access resources being used corresponding to the used reference signals. Wherein the multiple access resources include identities based on non-orthogonal multiple access techniques for distinguishing terminals, such as codebooks, spreading sequences, interleavers, scramblers, etc.
In the third embodiment, the detection process can be described with reference to fig. 9.
For a non-orthogonal multiple access technology, IGMA (cross gate multiple access technology, interleaved-GridMultiple Access), the correspondence between the multiple access resource provided by the present invention and the reference signal provided by the present invention may be as follows:
the primary reference signal corresponds to a bit-level interleaver and the secondary reference signal corresponds to a trellis mapping pattern.
Specifically, the bit-level interleaver is numbered, which is known at both the base station and terminal sides. At the same time, the primary reference signal is numbered or indexed. The number or index of the primary reference signal may be calculated according to the index of the primary reference signal (if a single index table is used for notification and configuration of the primary reference signal) in the foregoing embodiment, or according to an index combination of characteristic-related parameters of the primary reference signal. A simple example is if the main reference signal is configured by two index tables of cyclic shift and comb structure, and the corresponding configuration indexes are n CS (representing cyclic shift) and n comb (representing a comb structure), then index n of the main reference signal pri It can be calculated as:
n pri ＝K cs n comb +n cs
wherein, parameter K cs Indicating the number of cyclic shifts. Or expressed as:
n pri ＝K comb n cs +n comb
Wherein, parameter K comb The number of comb structures is indicated.
At the primary reference signal index n pri A one-to-one correspondence is established between the bit-level interleaver indexes, and when a terminal selects or a base station configures a main reference signal of a certain index, it indicates that the bit-level interleaver corresponding to the main reference signal is selected to be used.
Meanwhile, a corresponding relation is established between the auxiliary reference signal and the grid mapping. Specifically, the grid mapping pattern is numbered (or indexed) by means of pre-configuration or higher layer signaling or downlink control channel signaling, and the auxiliary reference signal is numbered (or indexed) at the same time. The numbering of the secondary reference signals requires consideration of both the time-frequency resource locations and the orthogonal cover code codewords used. If the orthogonal cover code word is not adopted, the number (or index) of the auxiliary reference signal is consistent with the index of the time-frequency resource position of the auxiliary reference signal; if the orthogonal cover code word is adopted, the time-frequency resource position index and the orthogonal cover code word index need to be considered simultaneously when the auxiliary reference signal is numbered. If the time-frequency resource position index is n tf Orthogonal cover code codeword index n occ Auxiliary reference signal index n sec It can be calculated as:
n sec ＝K occ n tf +n occ
wherein K is occ Is the number of codewords of the orthogonal cover code.
Or:
n sec ＝K tf n occ +n tf
wherein K is tf Is the number of time-frequency resource positions of the auxiliary reference signal.
Auxiliary reference signal index n sec Establishing one-to-one correspondence with the grid mapping pattern indexes, when a terminal selects or a base station configures a certain indexIndicating that the corresponding grid mapping pattern is selected for use.
In addition to the above manner, a one-to-one correspondence may be established between the main reference signal and the trellis mapping pattern, and a one-to-one correspondence may be established between the auxiliary reference signal and the bit-level interleaver.
When a terminal selects or a base station configures a primary reference signal of a certain index, it indicates that the corresponding grid mapping pattern is selected for use. When a terminal selects or a base station configures an auxiliary reference signal of a certain index, it indicates that the bit-level interleaver corresponding to the auxiliary reference signal is selected for use.
It should be noted that the mapping method is suitable for a two-stage multiple access resource terminal distinguishing method. For example, a one-to-one correspondence is established between the main reference signal and the multiple access resources of the first-stage distinguishing terminal, and a one-to-one correspondence is established between the auxiliary reference signal and the multiple access resources of the second-stage distinguishing terminal. When a terminal selects or a base station configures a main reference signal of a certain index, it indicates that the multiple access resource of the corresponding first-stage distinguishing terminal is selected to be used. When the terminal selects or the base station configures an auxiliary reference signal with a certain index, the multiple access resource of the corresponding second-level distinguishing terminal is selected to be used.
For the non-orthogonal multiple access technology in which terminals are distinguished by a single multiple access resource, the correspondence between reference signals and multiple access resources can be established as follows. First, a reference signal index is calculated from a primary reference signal index and a secondary reference signal index. Specifically, if the primary reference signal index is n pri The auxiliary reference signal index is n sec The reference signal index may be calculated as:
n RS ＝K sec n pri +n sec
wherein K is sec Is the number of auxiliary reference signals.
Or:
n RS ＝K pri n sec +n pri
wherein K is pri Is the number of primary reference signals.
After the index of the reference signal is obtained, a one-to-one correspondence is established between the index of the reference signal and the multiple access resource.
It should be noted that the above method is equally applicable to a multidimensional non-orthogonal multiple access method similar to IGMA. For the multidimensional non-orthogonal multiple access mode, the corresponding multiple access resource index is calculated according to the multiple access resource index of each dimension and corresponds to the corresponding reference signal index.
In addition, for the multidimensional non-orthogonal multiple access method similar to IGMA, in addition to the allocation of the correspondence between the reference signal and the multiple access resource by using the index correspondence method, for the case of fixing a certain dimension and distinguishing the terminal by using only the multiple access resource of another dimension, the correspondence between the reference signal index and the multiple access resource index for distinguishing the terminal may be established. For example, if the bit-level interleaver in the fixed IGMA allocates the same bit-level interleaver for the terminal transmitting data on the same time-frequency resource, and different trellis mapping patterns. At this time, a correspondence relationship between the grid mapping pattern index and the reference signal index is established. In another possibility, if the grid mapping pattern in the fixed IGMA is the same grid mapping pattern allocated to the terminal performing data transmission on the same time-frequency resource, and different bit-level interleavers are allocated. At this time, a correspondence relationship between the bit-level interleaver index and the reference signal index is established.
The correspondence is notified and configured by higher layer signaling or downlink control channels. A simple way is to define the calculation mode of the index in advance, and determine the corresponding relation according to the predetermined mode known to both the base station and the terminal, so as to obtain the multiple access resource corresponding to the corresponding reference signal.
Embodiment four:
in the fourth embodiment, a multiple access resource pool is configured, and configuration information of the multiple access resource pool is sent; the multiple access resource pool includes any of the following scenarios: a non-orthogonal multiple access time-frequency resource set and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource set; an orthogonal multiple access time-frequency resource set and the corresponding relation between the reference signal and the orthogonal multiple access time-frequency resource set; the method comprises the steps of non-orthogonal multiple access time-frequency resource set, orthogonal multiple access time-frequency resource set and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource set and the orthogonal multiple access time-frequency resource set.
In the fourth embodiment, a design method of a reference signal suitable for the non-orthogonal multiple access technology will be described with reference to a specific system. In the fourth embodiment, application of the method adopted by the present invention in a scheduling-free system will be described, and a method for allocating multiple access resources will be described.
The multiple access resource allocation method in the dispatching-free transmission system comprises the following two modes:
1. and configuring a multiple access resource pool, and configuring through high-layer signaling or a downlink control channel. And the terminal selects one multiple access resource with equal probability to transmit uplink data.
2. Multiple access resources for scheduling-free transmission are configured in a semi-static manner. And the terminal uses the configured multiple access resources to transmit data.
The first mode in the two modes can be used for a terminal in a connection state or a non-activation state, even in an idle state, and even can remove uplink synchronization (namely a random access process), so that signaling overhead can be reduced more effectively. But since the terminal randomly selects resources for uplink data transmission in the multiple access resource pool, the collision probability is not controllable by the base station. In the second approach, the terminal is required to operate in a linked state, and thus the signaling overhead is reduced slightly less than in the first approach. However, since the multiple access resources are controlled and allocated by the base station, the collision probability is controllable, and the base station can dynamically or semi-statically adjust the allocation of the multiple access resources according to the load situation.
By adopting the design mode of the reference signal provided by the embodiment of the invention, the allocation mode of the multiple access resource of the scheduling-free uplink data transmission is as follows.
For the first multiple access resource allocation method, the following method is adopted.
The multiple access resource pool includes several possible scenarios: the method can be used for a time-frequency resource set and a reference signal set which are accessed by non-orthogonal multiple access, or a time-frequency resource set and a reference signal set which are accessed by orthogonal multiple access, or a time-frequency resource set which are accessed by non-orthogonal multiple access, a time-frequency resource set which are accessed by orthogonal multiple access and a reference signal set. The specific configuration of the reference signal needs to be given to obtain the index of the reference signal, so that the corresponding relationship between the reference signal and the multiple access resource is convenient to establish.
Specifically, when the method provided by the embodiment of the invention is adopted, the reference signal set and the multiple access resource pool can be respectively configured. The reference signal configuration is respectively configured with a main reference signal and a corresponding auxiliary reference signal. And selecting corresponding reference signals and multiple access resources according to the corresponding relation between the reference signals and the multiple access resources which are preset or configured by the base station. The configuring the reference signal set includes: configuring all available main reference signals and corresponding auxiliary reference signals specifically comprises: configuring the total available primary reference signal (including cyclic shift and comb structure) and corresponding secondary reference signal time-frequency resource locations, if there is a corresponding orthogonal cover code codeword, further includes configuring the orthogonal cover code codeword used.
The terminal and the base station can determine corresponding reference signals through the selected multiple access resources according to the corresponding relation and are used for transmitting uplink data.
In another embodiment, in the configuration of the multiple access resource pool, the multiple access resources are configured and corresponding reference signals are configured. For example, when configuring the multiple access resources in the multiple access resource pool, the reference signal corresponding thereto is indicated. When the method provided by the embodiment of the invention is adopted, the corresponding main reference signal sequence characteristics (including cyclic shift, comb structure and possibly adopted orthogonal cover code words) need to be indicated, the time-frequency resource position of the auxiliary reference signal is determined, and the orthogonal cover code (if any) used by the auxiliary reference signal is determined. A simple example is as follows:
table 5: configuration example of multiple access resource pool
| Index | Multiple access resources | Main reference signal | Auxiliary reference signal |
| 0 | Resource 0 | Sequence 0 | Position 0+codeword 0 |
| 1 | Resource 1 | Sequence 1 | Position 1+ codeword 1 |
| 2 | Resource 2 | Sequence 2 | Position 2+ codeword 2 |
| 3 | Resource 3 | Sequence 3 | Position 3+ codeword 3 |
| … | … | … | … |
In the foregoing possible manner, the multiple access resource is mainly configured, and the reference signal is secondarily configured. In other possible manners, the reference signal may be configured mainly, and the multiple access resource may be configured secondarily, that is, the corresponding multiple access resource may be configured while the reference signal is configured.
The multiple access resource pool information is configured in a semi-static manner through high-layer signaling or is configured through a downlink control channel. After receiving the information of the multiple access resource pool, the terminal selects multiple access resources and corresponding reference signals from the multiple access resources with equal probability for sending uplink data.
For the second multiple access resource allocation method, the following method is adopted.
The base station configures corresponding multiple access resources and corresponding reference signals for the terminal needing to use non-orthogonal multiple access for data transmission through the high-layer signaling or the downlink control channel. And when the data transmission requirement exists, the terminal uses the configured multiple access resource and the reference signal to transmit uplink data.
It should be noted that, the base station may notify the reference signal configuration information and the multiple access resource configuration information at the same time, or notify the reference signal configuration information first and then notify the multiple access resource configuration information.
The above embodiment of the present invention not only provides effective and data-sufficient reference signals for UEs to be accessed, greatly increases the number of available reference signals, but also can give consideration to the accuracy of channel estimation, the overhead of reference signals and the capacity of reference signals, and provides channel estimation as accurate as possible under the condition of providing an acceptable number of reference signals. In addition, the method can be applied to the situation that the number of the bearing terminals is changed, and has certain flexibility.
Another embodiment of the present invention provides a method for data transmission, as shown in fig. 10, including: step 1010: receiving configuration information of reference signals from a base station, wherein the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet a corresponding relation; step 1020: and determining a first reference signal and a second reference signal according to the configuration information, and carrying out data transmission with the base station based on the first reference signal and the second reference signal.
Preferably, the first reference signal is a quadrature signal or a non-quadrature signal; and/or the second reference signal is a quadrature signal.
Preferably, the second reference signal is discrete or sequential.
Preferably, the method comprises the steps of, the discrete second reference signal is distinguished in a manner comprising at least one of: a frequency division mode, a time division mode, and a code division mode; the distinguishing manner of the second reference signals of the sequence type comprises at least one of the following: frequency division mode, time division mode, code division mode, cyclic shift and comb structure.
Preferably, determining the first reference signal and the second reference signal according to the configuration information includes: and determining a first reference signal according to the configuration information of the reference signal, and determining a second reference signal according to the corresponding relation between the first reference signal and the second reference signal.
Preferably, the correspondence relationship includes: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
Preferably, receiving configuration information of a reference signal from a base station includes: configuration information of a reference signal resource pool from a base station is received.
Preferably, the method further comprises: and receiving the corresponding relation between the reference signal and the multiple access resource.
Preferably, the correspondence between the reference signal and the multiple access resource includes correspondence between the first reference signal, the second reference signal and the multiple access resource; or determining the corresponding relation between the reference signal index and the multiple access resource based on the reference signal index obtained by calculating the first reference signal index and the second reference signal index.
Preferably, the method further comprises: receiving configuration information of a multiple access resource pool from a base station; the determining the first reference signal and the second reference signal according to the configuration information includes: selecting configuration information of the reference signal from configuration information of the reference signal resource pool, and determining the first reference signal and the second reference signal according to the selected configuration information of the reference signal.
The multiple access resource pool includes any of the following scenarios: a non-orthogonal multiple access time-frequency resource set and a corresponding relation between a reference signal and the non-orthogonal multiple access time-frequency resource set; the method comprises the steps of accessing a time-frequency resource set by orthogonal multiple access and the corresponding relation between a reference signal and the time-frequency resource set by orthogonal multiple access; non-orthogonal multiple access time-frequency resource set, and correspondence of reference signal and non-orthogonal multiple access time-frequency resource set, orthogonal multiple access time-frequency resource set.
According to the uplink transmission method provided by the embodiment of the invention, the terminal to be transmitted with data can determine the reference signals according to the allocated configuration information of the reference signals with enough quantity, and the data transmission is performed with the base station based on the reference signals, so that the terminal can perform the data transmission in time.
Another embodiment of the present invention provides a base station, as shown in fig. 11, including: a configuration module 111 and a transmission module 112.
Wherein, the configuration module 111 is configured to configure a reference signal; a transmitting module 112, configured to transmit configuration information of the reference signal; the reference signals include a first reference signal and a second reference signal, and the first reference signal and the second reference signal satisfy a correspondence therebetween.
Another embodiment of the present invention provides a terminal, as shown in fig. 12, including: the receiving module 121 and the transmitting module 122.
The receiving module 121 is configured to receive configuration information of a reference signal from a base station, where the reference signal includes a first reference signal and a second reference signal, and the first reference signal and the second reference signal satisfy a correspondence; the transmission module 122 is configured to determine a first reference signal and a second reference signal according to the configuration information, and perform data transmission with the base station based on the first reference signal and the second reference signal.
Another embodiment of the present invention provides a base station apparatus, including: a processor; and a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of configuring the reference signal.
Another embodiment of the present invention provides a terminal device, including: a processor; and a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of data transmission described above.
Fig. 13 schematically illustrates a block diagram of a computing system that may be used to implement a base station or user equipment of the present disclosure, in accordance with an embodiment of the present disclosure.
As shown in fig. 13, computing system 1300 includes a processor 1310, a computer-readable storage medium 1320, an output interface 1330, and an input interface 1340. The computing system 1300 may perform the methods described above with reference to fig. 1 or 10 to configure a reference signal and to perform data transmission based on the reference signal.
In particular, processor 1310 may include, for example, a general purpose microprocessor, an instruction set processor and/or an associated chipset and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), or the like. Processor 1310 may also include on-board memory for caching purposes. The processor 1310 may be a single processing unit or a plurality of processing units for performing different actions of the method flows described with reference to fig. 1 or 10.
Computer-readable storage media 1320 may be any medium capable of containing, storing, transmitting, propagating, or transmitting instructions, for example. For example, a readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. Specific examples of the readable storage medium include: magnetic storage devices such as magnetic tape or hard disk (HDD); optical storage devices such as compact discs (CD-ROMs); a memory, such as a Random Access Memory (RAM) or a flash memory; and/or a wired/wireless communication link.
The computer-readable storage medium 1320 may include a computer program that may include code/computer-executable instructions that, when executed by the processor 1310, cause the processor 1310 to perform the method flow and any variations thereof as described above in connection with fig. 1 or 10.
The computer program may be configured with computer program code comprising, for example, computer program modules. For example, in an example embodiment, code in a computer program may include one or more program modules, including for example module 1, module 2, … …. It should be noted that the division and number of modules is not fixed, and that a person skilled in the art may use suitable program modules or combinations of program modules according to the actual situation, which when executed by the processor 1310, enable the processor 1310 to perform the method flows and any variations thereof as described above in connection with fig. 1 or 10.
According to embodiments of the present disclosure, processor 1310 may use output interface 1330 and input interface 1340 to perform the method flows described above in connection with fig. 1 or 10, and any variations thereof.
Those skilled in the art will appreciate that the present application includes apparatuses related to performing one or more of the operations described herein. These devices may be specially designed and constructed for the required purposes, or may comprise known devices in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium or any type of medium suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROMs (Read-Only memories), RAMs (Random Access Memory, random access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.
Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present invention may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present invention may also be alternated, altered, rearranged, decomposed, combined, or deleted.
The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (36)
1. A method performed by a terminal in a wireless communication system, comprising:
receiving configuration information of reference signals from a base station, wherein the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet a corresponding relation;
determining a first reference signal and a second reference signal according to the configuration information of the reference signals;
receiving configuration information of a multiple access resource pool from a base station;
determining a multiple access resource pool based on the configuration information of the multiple access resource pool;
based on the determined multiple access resource pool, the first reference signal and the second reference signal, carrying out data transmission with the base station;
wherein the multiple access resource pool is configured by at least one of:
a non-orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource pool;
An orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the orthogonal multiple access time-frequency resource pool;
the reference signal is corresponding to the non-orthogonal multiple access time-frequency resource pool and the orthogonal multiple access time-frequency resource pool.
2. The method of claim 1, wherein the first reference signal is a quadrature signal or a non-quadrature signal; and/or, the second reference signal is a quadrature signal.
3. The method of claim 1, wherein determining the first reference signal and the second reference signal based on the configuration information of the reference signal comprises:
and determining a first reference signal according to the configuration information of the reference signal, and determining a second reference signal according to the corresponding relation between the first reference signal and the second reference signal.
4. A method according to claim 3, wherein the correspondence comprises: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
5. The method of claim 1, wherein the receiving configuration information of the reference signal from the base station comprises:
receiving configuration information of a reference signal resource pool from a base station;
the determining the first reference signal and the second reference signal according to the configuration information of the reference signal includes: and selecting the configuration information of the reference signals from the configuration information of the reference signal resource pool, and determining the first reference signals and the second reference signals according to the selected configuration information of the reference signals.
6. The method as recited in claim 1, further comprising: receiving a corresponding relation between a reference signal and a multiple access resource; the corresponding relation between the reference signal and the multiple access resource comprises the corresponding relation of the first reference signal, the second reference signal and the multiple access resource.
7. A method performed by a base station in a wireless communication system, comprising:
configuring a reference signal;
transmitting configuration information of the reference signal;
the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet the corresponding relation;
Configuring a multiple access resource pool and sending configuration information of the multiple access resource pool;
wherein configuring the multiple access resource pool comprises at least one of:
a non-orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource pool;
an orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the orthogonal multiple access time-frequency resource pool;
the reference signal is corresponding to the non-orthogonal multiple access time-frequency resource pool and the orthogonal multiple access time-frequency resource pool.
8. The method of claim 7, wherein the first reference signal is a quadrature signal or a non-quadrature signal; and/or, the second reference signal is a quadrature signal.
9. The method of claim 7, wherein the second reference signal is discrete or sequential; the discrete second reference signal is distinguished in a manner comprising at least one of: a frequency division mode, a time division mode, and a code division mode;
the distinguishing manner of the second reference signals of the sequence type comprises at least one of the following: frequency division mode, time division mode, code division mode, cyclic shift and comb structure.
10. The method of claim 7, wherein the step of determining the position of the probe is performed,
the correspondence relationship includes: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
11. The method of claim 7, wherein configuring the reference signal comprises: configuring a reference signal resource pool;
the transmitting the configuration information of the reference signal includes: transmitting the reference signal configuration information of the resource pool.
12. The method of claim 7, wherein the configuration information of the reference signal comprises: a characteristic-related parameter of the first reference signal, a characteristic-related parameter of the second reference signal, and correspondence information between the first reference signal and the second reference signal.
13. The method of claim 12, the first reference signal characteristic-related parameter comprising at least one of: cyclic shift of sequences, comb structure, orthogonal cover code words; and/or the number of the groups of groups,
when the second reference signal is a discrete reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resources or time-frequency resource allocation information, orthogonal cover code words; when the second reference signal is a sequential reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resource, cyclic shift of sequence, comb structure and orthogonal cover code word.
14. The method of claim 7, wherein the step of determining the position of the probe is performed,
the configuration information of the reference signal is different according to the number of the UE which can be carried or the number of the ports which are currently used;
the method further comprises the steps of:
the number of UEs capable of carrying or the number of ports currently used is notified.
15. The method as recited in claim 7, further comprising:
and configuring the corresponding relation between the reference signal and the multiple access resource.
16. The method of claim 15, wherein the correspondence between the reference signals and the multiple access resources comprises: the corresponding relation of the first reference signal, the second reference signal and the multiple access resource; or,
the configuring the corresponding relation between the reference signal and the multiple access resource comprises: calculating a reference signal index according to the first reference signal index and the second reference signal index; and configuring the corresponding relation between the reference signal index and the multiple access resource.
17. The method of claim 15, wherein the correspondence between the reference signals and the multiple access resources comprises:
the first reference signal corresponds to first multiple access resource information, and the second reference signal corresponds to second access resource information.
18. A base station apparatus comprising:
a processor; and
a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of any of claims 7-17.
19. A terminal device, comprising:
a processor; and
a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of any of claims 1-6.
20. A base station, comprising:
a configuration module for configuring a reference signal;
a transmitting module, configured to transmit configuration information of the reference signal;
the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet the corresponding relation;
the configuration module is further used for configuring a multiple access resource pool;
the sending module is further configured to send configuration information of the multiple access resource pool;
wherein configuring the multiple access resource pool comprises at least one of:
a non-orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource pool;
An orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the orthogonal multiple access time-frequency resource pool;
the reference signal is corresponding to the non-orthogonal multiple access time-frequency resource pool and the orthogonal multiple access time-frequency resource pool.
21. The base station of claim 20, wherein the first reference signal is a quadrature signal or a non-quadrature signal; and/or, the second reference signal is a quadrature signal.
22. The base station of claim 20, wherein the second reference signal is discrete or sequential; the discrete second reference signal is distinguished in a manner comprising at least one of: a frequency division mode, a time division mode, and a code division mode;
the distinguishing manner of the second reference signals of the sequence type comprises at least one of the following: frequency division mode, time division mode, code division mode, cyclic shift and comb structure.
23. The base station of claim 20, wherein the correspondence comprises: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
24. The base station of claim 20, wherein the base station,
the configuration module is specifically used for configuring a reference signal resource pool;
the sending module is specifically configured to send configuration information of the reference signal resource pool.
25. The base station of claim 20, wherein the configuration information of the reference signal comprises: a characteristic-related parameter of the first reference signal, a characteristic-related parameter of the second reference signal, and correspondence information between the first reference signal and the second reference signal.
26. The base station of claim 25, wherein the first reference signal characteristic-related parameter comprises at least one of: cyclic shift of sequences, comb structure, orthogonal cover code words; and/or the number of the groups of groups,
when the second reference signal is a discrete reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resources or time-frequency resource allocation information, orthogonal cover code words; when the second reference signal is a sequential reference signal, the second reference signal characteristic-related parameter includes at least one of: time-frequency resource, cyclic shift of sequence, comb structure and orthogonal cover code word.
27. The base station according to claim 20, wherein the configuration information of the reference signal is different according to the number of UEs that can be carried or the number of ports currently used;
the sending module is further configured to: the number of UEs capable of carrying or the number of ports currently used is notified.
28. The base station of claim 20, wherein the base station,
the configuration module is further configured to configure a correspondence between the reference signal and the multiple access resource.
29. The base station of claim 28, wherein the correspondence between the reference signals and the multiple access resources comprises: the corresponding relation of the first reference signal, the second reference signal and the multiple access resource; or,
the configuration module is specifically configured to calculate a reference signal index according to the first reference signal index and the second reference signal index; and configuring the corresponding relation between the reference signal index and the multiple access resource.
30. The base station of claim 28, wherein the correspondence between the reference signals and the multiple access resources comprises:
the first reference signal corresponds to first multiple access resource information, and the second reference signal corresponds to second access resource information.
31. A terminal, comprising:
the receiving module is used for receiving configuration information of reference signals from a base station, wherein the reference signals comprise a first reference signal and a second reference signal, and the first reference signal and the second reference signal meet a corresponding relation;
the receiving module is further configured to receive configuration information of a multiple access resource pool from a base station;
the transmission module is used for determining a first reference signal and a second reference signal according to the configuration information of the reference signal; determining a multiple access resource pool based on the configuration information of the multiple access resource pool; based on the determined multiple access resource pool, the first reference signal and the second reference signal, carrying out data transmission with the base station;
wherein the multiple access resource pool is configured by at least one of:
a non-orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the non-orthogonal multiple access time-frequency resource pool;
an orthogonal multiple access time-frequency resource pool and the corresponding relation between the reference signal and the orthogonal multiple access time-frequency resource pool;
the reference signal is corresponding to the non-orthogonal multiple access time-frequency resource pool and the orthogonal multiple access time-frequency resource pool.
32. The terminal of claim 31, wherein the first reference signal is a quadrature signal or a non-quadrature signal; and/or, the second reference signal is a quadrature signal.
33. The terminal of claim 31, wherein the terminal comprises a base station,
the transmission module is specifically configured to determine a first reference signal according to configuration information of the reference signal, and determine a second reference signal according to a correspondence between the first reference signal and the second reference signal.
34. The terminal of claim 33, wherein the correspondence relationship comprises: correspondence between at least one of the following characteristic-related parameters of the second reference signal and the first reference signal: time-frequency resources, cyclic shift, comb structure, orthogonal cover code codewords.
35. The terminal of claim 31, wherein the terminal comprises a base station,
the receiving module is specifically configured to receive configuration information of a reference signal resource pool from a base station;
the transmission module is specifically configured to select configuration information of the reference signal from configuration information of the reference signal resource pool, and determine the first reference signal and the second reference signal according to the selected configuration information of the reference signal.
36. The terminal of claim 31, wherein the terminal comprises a base station,
the receiving module is further used for receiving the corresponding relation between the reference signal and the multiple access resource; the corresponding relation between the reference signal and the multiple access resource comprises the corresponding relation of the first reference signal, the second reference signal and the multiple access resource.
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| CN201711079174.1A CN109756315B (en) | 2017-11-06 | 2017-11-06 | Method for configuring reference signal, method and equipment for data transmission |
| PCT/KR2018/003545 WO2018174686A1 (en) | 2017-03-24 | 2018-03-26 | Apparatus and method for in multiple access in wireless communication |
| US16/497,425 US11695507B2 (en) | 2017-03-24 | 2018-03-26 | Apparatus and method for in multiple access in wireless communication |
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| CN112104444B (en) * | 2019-06-17 | 2022-04-08 | 中国移动通信有限公司研究院 | Reference signal sending method, terminal and network side equipment |
| CN111385826B (en) * | 2020-01-09 | 2023-09-05 | 展讯通信（上海）有限公司 | Reference signal determining method, device, electronic equipment and storage medium |
| CN113765633B (en) * | 2020-06-03 | 2023-04-18 | 华为技术有限公司 | Method and communication device for transmitting reference signal |
| WO2022213330A1 (en) * | 2021-04-08 | 2022-10-13 | 北京小米移动软件有限公司 | Information transmission method and apparatus, communication device and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695191A (en) * | 2009-09-29 | 2010-04-14 | 中兴通讯股份有限公司 | System and method for distributing measurement reference signal resource |
| CN102624495A (en) * | 2011-01-30 | 2012-08-01 | 华为技术有限公司 | Processing method of reference signal configuration information in wireless communication system, base station and terminal thereof |
| CN105556887A (en) * | 2013-09-20 | 2016-05-04 | 高通股份有限公司 | Reference signal resource allocation |
| WO2017069510A1 (en) * | 2015-10-19 | 2017-04-27 | Samsung Electronics Co., Ltd. | Signal transmitting method, signal receiving method, transmitter and receiver |
-
2017
- 2017-11-06 CN CN201711079174.1A patent/CN109756315B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695191A (en) * | 2009-09-29 | 2010-04-14 | 中兴通讯股份有限公司 | System and method for distributing measurement reference signal resource |
| CN102624495A (en) * | 2011-01-30 | 2012-08-01 | 华为技术有限公司 | Processing method of reference signal configuration information in wireless communication system, base station and terminal thereof |
| CN105556887A (en) * | 2013-09-20 | 2016-05-04 | 高通股份有限公司 | Reference signal resource allocation |
| WO2017069510A1 (en) * | 2015-10-19 | 2017-04-27 | Samsung Electronics Co., Ltd. | Signal transmitting method, signal receiving method, transmitter and receiver |
Non-Patent Citations (1)
| Title |
|---|
| GP-150844 "Narrowband LTE Downlink Design (update of GP-150687)";Samsung Electronics Co.等;《3GPP tsg_geran\TSG_GERAN》;20150810;全文 * |
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