CN111869174B

CN111869174B - Data sending method and device

Info

Publication number: CN111869174B
Application number: CN201880091253.0A
Authority: CN
Inventors: 魏冬冬; 汪凡; 夏斌; 张朝贤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2021-11-30
Anticipated expiration: 2038-03-15
Also published as: WO2019174006A1; CN111869174A

Abstract

When the data transmission method is applied, first data is subjected to spread spectrum to obtain spread first data. And the combined data is sent on time-frequency resources, so that the first data and the second data use the same time-frequency resources and are sent at the same frequency, and the service data capacity can be improved. The method provided by the embodiment can be applied to various communication systems, such as V2X, LTE-V, V2V, internet of vehicles, MTC, IoT, LTE-M, M2M, internet of things, and the like.

Description

Data sending method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data sending method and apparatus.

Background

The development of communication technology enables a communication system to support the transmission of multiple types of communication data, and in a Long Term Evolution (LTE) system or a 5G New Radio (NR) system, multiple different service types, such as broadcast service, multicast service, unicast service, machine type communication, and the like, can be supported; and all adopt the way of Orthogonal Frequency Division Multiplexing (OFDM), transmit by multiplexing the data of different services to different time frequency resources. For example, non-unicast data such as broadcast service data and multicast service data are usually transmitted by multiplexing time-frequency resources for transmitting unicast data in a time division manner and a frequency division manner.

At present, the problem of service data capacity reduction exists when data of different services are multiplexed to different time frequency resources for transmission, for example, non-unicast data occupy the time frequency resources for transmitting unicast data no matter the non-unicast data are transmitted by multiplexing the time frequency resources for transmitting unicast data in a time division manner, or the non-unicast data are transmitted by multiplexing the time frequency resources for transmitting unicast data in a frequency division manner, and the occupied time frequency resources for transmitting unicast data cannot transmit unicast data at the same time, so that the time frequency resources for transmitting unicast data are inevitably reduced, and further the unicast service data capacity is reduced.

Disclosure of Invention

The embodiment of the application provides a data sending method and device, so as to improve the service data capacity.

In a first aspect, an embodiment of the present application provides a data transmission method, which may be applied to a network device, or may also be applied to a chip inside the network device. In the method, spread spectrum is carried out on first data to obtain spread spectrum first data, the spread spectrum first data and second data are combined to obtain combined data, and the combined data are sent on time frequency resources.

In a second aspect, the present application provides a data receiving method, which may be applied to a terminal or may also be applied to a chip inside the terminal. In the method, second data and spread first data are received on time frequency resources, and the spread first data are despread to obtain first data.

Specifically, if the received data does not include the second data but only includes the spread first data, the received data may be despread, and then the despread data is demodulated to obtain the first data, so as to improve the signal-to-noise ratio of the received first data. If the received data includes the second data and the spread first data, the second data can be demodulated to obtain the second data, the spread first data can be despread, then the despread data can be demodulated to obtain the first data, or after the received data is despread and demodulated to obtain the first data, the first data in the received data can be eliminated by a serial interference elimination method to obtain the second data.

In a third aspect, the present application provides a data transmission apparatus, including: comprising means or units for performing the steps of the first aspect above.

In a fourth aspect, the present application provides a data transmission apparatus comprising at least one processor and a memory, the at least one processor being configured to perform the method provided in the first aspect above.

In a fifth aspect, the present application provides a data transmission apparatus comprising at least one processor and an interface circuit, the at least one processor being configured to perform the method provided in the first aspect above.

In a sixth aspect, the present application provides a data transmission program which, when executed by a processor, is operable to perform the method of the first aspect above.

In a seventh aspect, there is provided a program product, such as a computer readable storage medium, comprising the program of the sixth aspect.

Therefore, in each aspect, the first data is combined with the second data after being spread, and the combined data is sent on the time-frequency resource, so that the spread first data and the second data use the same time-frequency resource and are sent at the same frequency, and further, the service data capacity can be improved.

In the above aspects, the first data may be non-unicast data, and the non-unicast data may be, for example, broadcast service data, multicast service data, or the like. The second data may be unicast data.

The first data and the second data after the frequency spreading are combined, and any one of the following modes can be adopted:

mode 1: and allocating different transmitting powers to the modulated first data and the modulated second data after the spread spectrum processing, and sending the modulated first data and the modulated second data after the spread spectrum processing on the same time-frequency resource. Mode 2: and allocating a power ratio to the modulated first data and the modulated second data, and combining the modulated first data and the modulated second data into third data according to the allocated power ratio.

In the embodiment of the present application, the time-frequency resource used for sending the merged data may be the time-frequency resource originally used for sending the second data.

In a possible design, in the embodiment of the present application, the length of the spreading sequence used for spreading the first data should be configured within a limited range of the maximum value and the minimum value of the length of the spreading sequence, so that the service rate of the spread first data transmission should meet the requirement of the lowest service rate, and the coverage requirement of the first data is met after the first data is spread by using the minimum value of the length of the spreading sequence.

In a possible implementation manner, in this embodiment of the present application, the available symbols in the time unit for transmitting the first data may be grouped, and a length of the available symbols in the group obtained by grouping is used as a length of a spreading sequence used for spreading the first data.

Wherein, the time unit for transmitting the first data may be a subframe, a slot, etc.

In the embodiment of the present application, an exemplary length configuration range of the length of the spreading sequence used for spreading the first data may be {2, 3, 4, 5, 6, 7, 11, 12, 13}, where the length unit may be a symbol.

In another possible implementation manner, in this embodiment of the application, the length of the spreading sequence used for spreading the first data may be indicated by the indication information.

The first indication information may indicate the number of groups obtained by grouping symbols available in a time unit for transmitting the first data, and the length of the available symbols in each group.

When the first data is broadcast service data, the first indication information may be system information, for example, in an LTE system, the system information may be SIB2 or SIB 13. In the NR system, the system information may be OSI. When the first data is multicast service data, the first indication information may be DCI.

In another possible design, when the second data and the spread first data are simultaneously transmitted on the time-frequency resource for transmitting the second data at the same frequency, the power for transmitting the spread first data is smaller than the power for transmitting the second data, so as to reduce the influence on the transmission of the second data caused by transmitting the spread first data on the time-frequency resource for transmitting the second data.

In yet another possible design, the power used for transmitting the spread first data and the power used for transmitting the second data may be indicated by the second indication information.

The second indication information may be used to indicate a ratio between power used for transmitting the spread first data and power used for transmitting the second data, so as to indicate the power used for transmitting the spread first data and the power used for transmitting the second data.

When the first data is broadcast service data, the second indication information may be system information, for example, in an LTE system, the system information may be SIB2 or SIB 13. In the NR system, the system information may be OSI. When the first data is multicast service data, the second indication information may be DCI.

In another possible design, in the embodiment of the present application, when the second data and the spread first data are simultaneously co-frequency transmitted on the time-frequency resource for transmitting the second data, the CP length used for transmitting the spread first data is the same as the CP length used for transmitting the second data, so as to avoid interference as much as possible and simplify the processing complexity of receiving data. The CP used for transmitting the second data and the spread first data may be an extended CP or a normal CP.

Drawings

Fig. 1 is a diagram of a communication system architecture to which a data transmission method according to an embodiment of the present application is applied;

fig. 2 is a schematic view of a scene to which a data transmission method according to an embodiment of the present application is applied;

fig. 3 is a flowchart of an implementation of a data transmission method according to an embodiment of the present application;

fig. 4 is a schematic diagram of determining a length of a spreading sequence according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

Please refer to fig. 1, which is a schematic diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the terminal performs wireless access through an access link provided by a High Altitude Platform (HAPS), and the HAPS communicates with the ground gateway through a dedicated backhaul link to return user data and further access the internet.

Among them, a terminal is also called User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., and is a device providing voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.

The HAPS integrates functions of network devices, where the network devices are devices in a wireless network, such as Radio Access Network (RAN) nodes for accessing a terminal to the wireless network, and the RAN nodes may also be referred to as base stations. Currently, some examples of network devices are: a Node B (gnb) that continues to evolve, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) access point (access point, AP). In addition, in one network configuration, the RAN may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure separates the protocol layers of the eNB in a Long Term Evolution (LTE) system, the functions of part of the protocol layers are controlled in the CU in a centralized way, the functions of the rest part or all of the protocol layers are distributed in the DU, and the CU controls the DU in a centralized way.

The HAPS can be expandable, the HAPS can also be a data relay, the network equipment is arranged on the ground side, and the HAPS transmits the signals to the terminal after the network equipment transmits the signals to the HAPS.

Please refer to fig. 2, which is an application scenario according to an embodiment of the present application, in which a terminal can support a unicast service and a broadcast service simultaneously. The HAPS can transmit unicast signals through 1 or more beamlets, can also transmit multicast signals through 1 or more beamlets, or can transmit broadcast signals through a large beam that is an equivalent composite of all beamlets. Generally, when the HAPS transmits a broadcast signal, the HAPS transmits the broadcast signal by multiplexing time-frequency resources of a unicast signal in an OFDM manner and in a time division manner or a frequency division manner. However, no matter the broadcast signal is sent in a time division manner or a frequency division manner, the time frequency resource for multiplexing the unicast signal is occupied, and the occupied time frequency resource cannot send the unicast signal at the same time, so that the time frequency resource for sending the unicast signal is reduced, and the data capacity of the unicast service is reduced.

In view of this, an embodiment of the present application provides a data transmission method, in which first data (e.g., non-unicast data such as broadcast service data and multicast service data) is spread to obtain spread first data, the spread first data and second data (e.g., unicast data) are combined to obtain combined data, and the combined data is transmitted on a time-frequency resource, so that the first data and the second data use the same time-frequency resource and are transmitted at the same time and at the same frequency, thereby improving service data capacity.

Fig. 3 is a flowchart illustrating an implementation of a data transmission method according to an embodiment of the present application, and referring to fig. 3, the method includes:

s101: and spreading the first data to obtain spread first data.

In this embodiment, the first data may be non-unicast data such as broadcast service data and multicast service data sent by the HAPS to the terminal in the HAPS coverage area. The HAPS integrated with the network device function may perform channel coding and modulation on the first data and then perform spreading to obtain the spread first data.

Specifically, in the embodiment of the present application, the symbol stream { s with length l of the first data is used as the symbol stream₀，s₁，s₂，...，s_l-1The first data after frequency spreading is X_bThe description is given for the sake of example. For a length l symbol stream s₀，s₁，s₂，...，s_l-1Spreading with a spreading sequence of length m to obtain a spread symbol stream X_b＝{s_0，0，s_0，1，s_0，2，...s_0，m-1，s_1，0，s_1，1，s_1，2，...s_1，m-1，s_2，0，s_2，1，s_2，2，...s_2，m-1，...，s_l-1，0，s_l-1，1，s_l-1，2，...s_l-1，m-1And the length of the symbol stream after spreading is ml.

In the embodiment of the present application, the length of the spreading sequence used for spreading the first data should be configured within a range defined by the maximum value and the minimum value of the length of the spreading sequence. For example, the maximum value of the length of the spreading sequence may be determined by the lowest service rate, that is, after the non-unicast data is spread by using the maximum value of the length of the spreading sequence, the service rate of the spread first data transmission should meet the requirement of the lowest service rate. The minimum value of the length of the spreading sequence can be determined according to the coverage requirement of the first data, that is, the minimum value of the length of the spreading sequence is adopted to perform spreading processing on the first data, so that the coverage requirement of the first data is met.

In one possible example, in this embodiment, the available symbols in the time unit for transmitting the first data may be grouped, and the length of the available symbols in the group obtained by grouping is used as the length of the spreading sequence used for spreading the first data. In this embodiment of the present application, an available symbol in a time unit for transmitting first data may be used as one packet, and a length of the available symbol in the entire time unit may be used as a length of a spreading sequence used for spreading the first data, or the available symbol in the time unit for transmitting the first data may be divided into a plurality of packets, and a length of the available symbol in each packet may be used as a length of a spreading sequence used for spreading the first data. The time unit for transmitting the first data may be a subframe, a time slot, or the like, and of course, the specific form of the time unit for transmitting the first data is not limited in the present application. In one possible embodiment, the time unit is a subframe. In the embodiment of the application, the available symbols in the subframe for transmitting the first data can be grouped according to the time slot. For example, referring to fig. 4, in an LTE system, each subframe includes 2 slots (slots), namely slot0 and slot1, there are 5 available symbols in slot0, and there are 7 available symbols in slot1, so that first data transmitted in slot0 may be spread by using a spreading sequence with length 5, and first data transmitted in slot1 may be spread by using a spreading sequence with length 7. It is to be understood that other implementations of grouping the available symbols in the subframe for transmitting the first data may also be adopted in the embodiments of the present application, for example, the grouping of the available symbols in the subframe for transmitting the first data may be performed in the whole subframe. In another possible implementation, in this embodiment of the present application, the time units may be slots, and the available symbols in each slot may be grouped, for example, in an LTE system, each subframe includes 2 slots (slots), which are slot0 and slot1, there are 5 available symbols in slot0, there are 7 available symbols in slot1, the 5 available symbols in slot0 may be divided into two groups, symbol 2 and symbol 3 are divided into one group, and symbol 4, symbol 5, and symbol 6 are divided into one group. The 7 available symbols in slot1 are divided into three groups, symbol 7 and symbol 8 are divided into one group, symbol 9 and symbol 10 are divided into one group, and symbol 11, symbol 12 and symbol 13 are divided into one group. When first data is transmitted on

symbols

2 and 3 of slot0, spreading may be performed using a spreading sequence of length 2, and the spread first data may be transmitted on

symbols

2 and 3. When the first data is transmitted on symbol 4, symbol 5, and symbol 6 of slot0, the spread first data may be spread with a spreading sequence of length 3 and transmitted on symbol 4, symbol 5, and symbol 6. The implementation is similar when the first data is sent on the symbol of slot1 and will not be described in detail here.

In this embodiment, the length of the spreading sequence used for spreading the first data may be indicated by the indication information. For convenience of description in the embodiments of the present application, the indication information indicating the length of the spreading sequence used for spreading the first data may be referred to as first indication information.

Specifically, when the first indication information indicates the length of the spreading sequence used for spreading the first data, the number of groups obtained by grouping the available symbols in the subframe for transmitting the first data and the length of the available symbols in each group may be indicated.

When the first data is broadcast service data, the first indication information may be system information, for example, in an LTE system, the system information may be System Information Block (SIB) 2 or SIB 13. In the NR system, the system information may also be an on-demand system information (OSI). When the first data is multicast service data, the first indication information may be Downlink Control Information (DCI).

S102: and combining the spread first data and the second data to obtain combined data.

In this embodiment of the present application, any one of the following manners may be adopted to combine the spread first data and the second data:

mode 1: for the modulated first data and the modulated second data which are subjected to the spread spectrum processing, the network equipment allocates different transmitting powers, and transmits the modulated first data and the modulated second data which are subjected to the spread spectrum processing on the same time-frequency resource. In other words, the combined data includes the spread spectrum processed first data and the modulated second data transmitted on the same time-frequency resource.

Mode 2: and for the modulated first data and the modulated second data which are subjected to the spread spectrum processing, the network equipment allocates a power ratio, and combines the modulated first data and the modulated second data into third data according to the allocated power ratio. In other words, the merged data includes the third data transmitted on the time-frequency resource.

In the embodiment of the present application, the first m1 symbols of the second data symbol stream can be represented by X_uAnd (4) showing. In this embodiment, the second data may be unicast data sent by the HAPS to the terminal in the HAPS coverage area. HAPS streams of symbols X_bAnd a symbol stream X_uSuperposing and merging to obtain merged data X ═ X_b+X_u。

In the embodiment of the present application, the HAPS converts the symbol stream X_bAnd a symbol stream X_uAfter superposition and merging, the merged data X may be defined as X_b+X_uAnd mapping to time frequency resource for sending. Specifically, when mapping the combined data X ═ Xb + Xu to the time-frequency resource, the HAPS needs to map m spread symbols obtained by spreading a single modulation symbol to m consecutive symbols corresponding to a certain subcarrier or to m consecutive subcarriers.

S103: and sending the combined data on time frequency resources.

In the embodiment of the present application, the time-frequency resource used for sending the merged data may be the time-frequency resource originally used for sending the second data. In other words, in the embodiment of the present application, the merged data is sent on the time frequency resource, which may be understood as mapping the spread first data to the time frequency resource for sending the second data, and sending the data with the second data at the same time and at the same frequency.

When the first data is broadcast data, the HAPS may perform OFDM time-frequency resource mapping on the spread first data, and map the spread first data to m consecutive OFDM subcarriers on the time-frequency resource for sending the second data. Wherein, when the first data is broadcast data, the position of the mapping start symbol may be a predefined fixed position. For example, the predefined fixed position is symbol 2, and the mapping start symbol of the broadcast data is fixed to symbol 2 regardless of the number of symbols of a Physical Downlink Control Channel (PDCCH). Or the starting symbol of the broadcast data map may be notified by a system message and remain fixed for a period of time, or the starting symbol of the broadcast data map may be related to the system bandwidth, etc. When the second data is unicast data, the mapping start symbol of the unicast data depends on the number of symbols of the PDCCH, and mapping is started from the first symbol after the PDCCH ends.

When the first data is multicast data, the HAPS may perform non-orthogonal multiple access (NOMA) time-frequency resource mapping on the spread first data, and transmit the same time-frequency resource as the second data in a multiplexing manner. When the first data is multicast data and time-frequency resource mapping is performed, a first symbol after a Physical Downlink Control Channel (PDCCH) is used as an initial mapping symbol, and the spread first data is mapped to m consecutive subcarriers on the time-frequency resource for sending the second data. When the second data is unicast data, the initial mapping symbol of the unicast data is also the first symbol after the PDCCH, that is, the mapping initial positions of the spread first data and the second data are the same.

It is understood that, in this embodiment of the present application, the first data may be broadcast data or multicast data of a Multimedia Broadcast Multicast Service (MBMS), and may also be communication data in Machine Type Communications (MTC) or internet of things (IoT) communication services.

In a possible implementation manner, in this embodiment, when the second data and the spread first data are simultaneously transmitted on the time-frequency resource for transmitting the second data at the same frequency, the power used for transmitting the spread first data is smaller than the power for transmitting the second data, so as to reduce the influence on the transmission of the second data caused by transmitting the spread first data on the time-frequency resource for transmitting the second data.

Specifically, in the embodiment of the present application, the power used for transmitting the spread first data should be configured within a set power maximum limit range. The maximum value of the power used for transmitting the spread first data satisfies that a carrier to interference plus noise ratio (CINR) for data transmission by the worst user in the cell using the maximum power value is less than or equal to a set threshold (e.g., 1 dB).

Specifically, in the embodiment of the present application, the indication information may indicate the power used for transmitting the spread first data and the power for transmitting the second data. For convenience of description in the embodiment of the present application, the indication information indicating the power used for transmitting the spread first data and the power for transmitting the second data may be referred to as second indication information.

In a possible implementation manner, in this embodiment, a ratio between power used for transmitting the spread first data and power used for transmitting the second data may be predefined, and then the second indication information indicates the ratio between power used for transmitting the spread first data and power used for transmitting the second data, so as to indicate the power used for transmitting the spread first data and the power used for transmitting the second data.

In yet another possible implementation manner, in this embodiment of the application, when the second data and the spread first data are simultaneously co-frequency transmitted on a time-frequency resource for transmitting the second data, a Cyclic Prefix (CP) length used for transmitting the spread first data is the same as a CP length used for transmitting the second data, so as to avoid interference as much as possible and simplify processing complexity of a receiver. Specifically, the CP used for transmitting the second data and the spread first data may be an extended CP or a normal (normal) CP.

In the embodiment of the present application, a sending end (e.g., HAPS) spreads the spectrum of first data, combines the spread spectrum with second data, and sends the combined spectrum on the same time-frequency resource, and a receiving end (e.g., a terminal) may receive the second data and the spread spectrum of first data on the time-frequency resource, and de-spreads the spread spectrum of first data to obtain the first data.

Specifically, if the data received by the receiving end does not have the second data but only has the spread first data, the receiving end may despread the received data, and then demodulate the despread data to obtain the first data, so as to improve the signal-to-noise ratio of the received first data. If the data received by the receiving end comprises the second data and the spread first data, the receiving end can demodulate the second data to obtain the second data, de-spread the spread first data and then demodulate the de-spread data to obtain the first data. The receiving end can also remove the first data in the received data by a serial interference elimination method after de-spreading and demodulating the received data to obtain the first data, so as to obtain the second data.

In the embodiment of the application, the sending end is an HAPS, when the receiving end is a terminal, all terminals in the coverage area of the HAPS can receive the second data and the spread first data which are simultaneously sent at the same frequency, or part of the terminals in the coverage area of the HAPS can receive the second data and the spread first data which are simultaneously sent at the same frequency, and the rest of the terminals can support receiving the data sent in a traditional mode. If part of terminals exist in the HAPS coverage area and support to receive the second data and the first data after spreading, which are sent by the same frequency and related to the embodiment of the present application, and part of terminals support to receive data sent by a traditional method (for example, support to receive data sent by a multimedia broadcast multicast single frequency network (MBSFN) subframe scheme), part of subframes may be configured to be used to send the second data and the first data after spreading at the same frequency and configured as MBSFN subframes to send data by a traditional method.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between a terminal and a network device. It is understood that the terminal and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. The elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein may be embodied in hardware or in a combination of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present teachings.

In the embodiment of the present application, the terminal and the network device may be divided according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Based on the same inventive concept, the present application also provides an apparatus for implementing any one of the above methods, for example, an apparatus including a unit (or means) for implementing each step performed by a network device in any one of the above methods is provided. For another example, another apparatus is also provided, which includes means for performing each step performed by the terminal in any one of the above methods.

In a possible implementation manner, an embodiment of the present application provides a data transmission apparatus 100, and referring to fig. 5, the data transmission apparatus 100 includes a processing unit 101 and a transmission unit 102. The processing unit 101 is configured to spread the first data to obtain spread first data. A sending unit 102, configured to combine the first data and the second data obtained after the spread spectrum processing by the processing unit 101 to obtain combined data, and send the combined data on a time-frequency resource.

In another possible implementation manner, an embodiment of the present application provides a data receiving apparatus 200, and referring to fig. 6, the data receiving apparatus 200 includes a receiving unit 201 and a processing unit 202. The receiving unit 201 receives the second data and the spread first data on the time-frequency resource. The processing unit 202 is configured to despread the spread first data to obtain first data.

Specifically, if the data received by the receiving unit 201 does not include the second data, but only includes the spread first data, the processing unit 202 may despread the received data, and then demodulate the despread data to obtain the first data, so as to improve the signal-to-noise ratio of the received first data. If the data received by the receiving unit 201 includes the second data and the spread first data, the processing unit 202 may demodulate the second data to obtain the second data, despread the spread first data, and demodulate the despread data to obtain the first data. The processing unit 202 may also obtain the second data by removing the first data in the received data by a serial interference cancellation method after despreading and demodulating the received data to obtain the first data.

The first data may be non-unicast data, and the non-unicast data may be, for example, broadcast service data, multicast service data, or the like. The second data may be unicast data.

The processing unit 101 may combine the spread first data and the second data by any one of the following manners:

In this embodiment, the time-frequency resource used by the sending unit 102 to send the merged data may be the time-frequency resource originally used to send the second data. The time-frequency resource for receiving the data by the receiving unit may also be the time-frequency resource for originally transmitting the second data.

In a possible design, in this embodiment of the application, the length of the spreading sequence used by the processing unit 101 to spread the first data should be configured within a limited range of the maximum value and the minimum value of the length of the spreading sequence, so that the service rate of the spread first data transmission should meet the requirement of the lowest service rate, and the coverage requirement of the first data is met after the first data is spread by using the minimum value of the length of the spreading sequence.

In a possible implementation manner, in this embodiment of the application, the processing unit 101 may group available symbols in a time unit for transmitting the first data, and use a length of the available symbols in the group obtained by grouping as a length of a spreading sequence used for spreading the first data.

In the embodiment of the present application, an exemplary length configuration range of the length of the spreading sequence used by the processing unit 101 to spread the first data may be {2, 3, 4, 5, 6, 7, 11, 12, 13}, where the length unit may be a symbol.

In another possible implementation manner, in this embodiment of the application, the length of the spreading sequence used by the processing unit 101 to spread the first data may be indicated by the indication information.

In another possible design, when the sending unit 102 sends the second data and the spread first data on the time-frequency resource for sending the second data at the same time and with the same frequency, the power used for sending the spread first data is smaller than the power for sending the second data, so as to reduce the influence on the transmission of the second data caused by sending the spread first data on the time-frequency resource for sending the second data.

In yet another possible design, the power used by the sending unit 102 to send the spread first data and the power to send the second data may be indicated by the second indication information.

In another possible design, in this embodiment, when the sending unit 102 sends the second data and the spread first data on the time-frequency resource for sending the second data at the same time, the CP length used for sending the spread first data is the same as the CP length used for sending the second data, so as to avoid interference as much as possible and simplify the processing complexity of receiving the data. The CP used for transmitting the second data and the spread first data may be an extended CP or a normal CP.

It should be understood that the division of the units in the above apparatus is only a division of logical functions, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And the units in the device can be realized in the form of software called by the processing element; or may be implemented entirely in hardware; part of the units can also be realized in the form of software called by a processing element, and part of the units can be realized in the form of hardware. For example, each unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory in the form of a program, and a function of the unit may be called and executed by a processing element of the apparatus. In addition, all or part of the units can be integrated together or can be independently realized. The processing element described herein may in turn be a processor, which may be an integrated circuit having signal processing capabilities. In the implementation process, the steps of the method or the units above may be implemented by integrated logic circuits of hardware in a processor element or in a form called by software through the processor element.

In one example, the units in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), or a combination of at least two of these integrated circuit forms. As another example, when a unit in a device may be implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of invoking programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above unit for receiving is an interface circuit of the apparatus for receiving signals from other apparatuses. For example, when the device is implemented in the form of a chip, the receiving unit is an interface circuit for the chip to receive signals from other chips or devices. The above unit for transmitting is an interface circuit of the apparatus for transmitting a signal to other apparatuses. For example, when the device is implemented in the form of a chip, the transmitting unit is an interface circuit for the chip to transmit signals to other chips or devices.

Please refer to fig. 7, which is a schematic structural diagram of a network device according to an embodiment of the present application. For implementing the operation of the network device in the above embodiments. As shown in fig. 7, the network device includes: antenna 111, radio frequency device 112, baseband device 113. The antenna 111 is connected to a radio frequency device 112. In the uplink direction, the rf device 112 receives information transmitted by the terminal through the antenna 111, and transmits the information transmitted by the terminal to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information of the terminal and sends the information to the rf device 112, and the rf device 112 processes the information of the terminal and sends the processed information to the terminal through the antenna 111.

The baseband device 113 may include one or more processing elements 1131, including, for example, a host CPU and other integrated circuits. In addition, the baseband device 113 may further include a storage element 1132 and an interface circuit 1133, where the storage element 1132 is used for storing programs and data; the interface circuit 1133 is used for exchanging information with the radio frequency device 112, and is, for example, a Common Public Radio Interface (CPRI). The above means for the network device may be located on the baseband apparatus 113, for example, the above means for the network device may be a chip on the baseband apparatus 113, the chip comprising at least one processing element and interface circuitry, wherein the processing element is configured to perform the steps of any of the methods performed by the above network device, and the interface circuitry is configured to communicate with other devices. In one implementation, the unit of the network device for implementing the steps in the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for the network device includes a processing element and a storage element, and the processing element calls a program stored in the storage element to execute the method executed by the network device in the above method embodiment. The memory elements may be memory elements on the same chip as the processing element, i.e. on-chip memory elements, or may be memory elements on a different chip than the processing element, i.e. off-chip memory elements.

In another implementation, the unit of the network device for implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the baseband apparatus, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the network device implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC), for example, a baseband device including the SOC chip for implementing the above method. At least one processing element and a storage element can be integrated in the chip, and the method executed by the network equipment is realized in the form that the processing element calls the stored program of the storage element; or, at least one integrated circuit may be integrated in the chip, for implementing the method executed by the above network device; alternatively, the above implementation modes may be combined, the functions of the partial units are implemented in the form of a processing element calling program, and the functions of the partial units are implemented in the form of an integrated circuit.

It is seen that the above apparatus for a network device may comprise at least one processing element and interface circuitry, wherein the at least one processing element is configured to perform the method performed by any one of the network devices provided by the above method embodiments. The processing element may: namely, calling the program stored in the storage element to execute part or all of the steps executed by the network equipment; it is also possible to: that is, some or all of the steps performed by the network device are performed by integrated logic circuitry of hardware in the processor element in combination with the instructions; of course, some or all of the steps performed by the above network device may also be performed in combination with the first manner and the second manner.

The processing elements herein, like those described above, may be a general purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above methods, such as: one or more ASICs, or one or more microprocessors DSP, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.

The storage element may be a memory or a combination of a plurality of storage elements.

Please refer to fig. 8, which is a schematic structural diagram of a terminal according to an embodiment of the present application. It may be the terminal in the above embodiment, for implementing the operation of the terminal in the above embodiment. As shown in fig. 8, the terminal includes: antenna 210, radio frequency device 220, signal processing device 230. The antenna 210 is connected to a radio frequency device 220. In the downlink direction, the rf device 220 receives information transmitted by the network device through the antenna 210, and transmits the information transmitted by the network device to the signal processing device 230 for processing. In the uplink direction, the signal processing device 230 processes the information of the terminal and sends the information to the radio frequency device 220, and the radio frequency device 220 processes the information of the terminal and sends the information to the network device through the antenna 210.

Signal processing device 230 may include a modem subsystem for implementing processing of various communication protocol layers of data; the system also comprises a central processing subsystem used for realizing the processing of a terminal operating system and an application layer; in addition, other subsystems, such as a multimedia subsystem for implementing control of a terminal camera, a screen display, etc., peripheral subsystems for implementing connection with other devices, and the like may be included. The modem subsystem may be a separately provided chip. Alternatively, the above means for the terminal may be located at the modem subsystem.

The modem subsystem may include one or more processing elements 231, including, for example, a main control CPU and other integrated circuits. The modem subsystem may also include a memory element 232 and an interface circuit 233. The storage element 232 is used to store data and programs, but the programs for executing the methods executed by the terminal in the above methods may not be stored in the storage element 232, but stored in a memory outside the modem subsystem, and the modem subsystem is loaded for use when in use. Interface circuit 233 is used to communicate with other subsystems. The above apparatus for a terminal may be located in a modem subsystem, which may be implemented by a chip comprising at least one processing element for performing the steps of any of the methods performed by the above terminal and interface circuitry for communicating with other apparatus. In one implementation, the unit of the terminal for implementing the steps of the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for the terminal includes a processing element and a storage element, and the processing element calls a program stored in the storage element to execute the method executed by the terminal in the above method embodiment. The memory elements may be memory elements with the processing elements on the same chip, i.e. on-chip memory elements.

In another implementation, the program for performing the method performed by the terminal in the above method may be a memory element on a different chip than the processing element, i.e. an off-chip memory element. At this time, the processing element calls or loads a program from the off-chip storage element onto the on-chip storage element to call and execute the method executed by the terminal in the above method embodiment.

In yet another implementation, the unit of the terminal implementing the steps of the above method may be configured as one or more processing elements disposed on the modem subsystem, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the terminal implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC) chip for implementing the above method. At least one processing element and a storage element can be integrated in the chip, and the processing element calls the stored program of the storage element to realize the method executed by the terminal; or, at least one integrated circuit may be integrated in the chip for implementing the method executed by the above terminal; alternatively, the above implementation modes may be combined, the functions of the partial units are implemented in the form of a processing element calling program, and the functions of the partial units are implemented in the form of an integrated circuit.

It will be seen that the above apparatus for a terminal may comprise at least one processing element and interface circuitry, wherein the at least one processing element is adapted to perform any of the methods performed by the terminal provided by the above method embodiments. The processing element may: namely, calling the program stored in the storage element to execute part or all of the steps executed by the terminal; it is also possible to: that is, some or all of the steps performed by the terminal are performed by integrated logic circuits of hardware in the processor element in combination with instructions; of course, some or all of the steps performed by the terminal may be performed in combination with the first and second manners.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, which includes the foregoing network device and one or more terminals.

The embodiment of the present application further provides a data sending apparatus, which is applied to a network device and includes at least one processing element (or chip) for executing the above method embodiment.

The present application provides a data transmission program for executing the data transmission method of the above embodiment when executed by a processor.

The present application also provides a program product, such as a computer-readable storage medium, including the program of the data transmission method referred to above.

The embodiment of the present application further provides a data receiving apparatus, which is applied to a terminal and includes at least one processing element (or chip) for executing the above method embodiment.

The present application provides a data receiving program for executing the data receiving method of the above embodiment when executed by a processor.

The present application also provides a program product, such as a computer-readable storage medium, comprising a program of the data receiving method referred to above.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims

1. A method for transmitting data, the method comprising:

spreading the first data to obtain spread first data;

merging the spread first data and second data to obtain merged data;

and sending the combined data on a time-frequency resource, wherein the power for sending the spread first data is less than the power for sending the second data.

2. The method of claim 1, wherein the first data is non-unicast data and the second data is unicast data.

3. A method according to claim 1 or 2, wherein the length of the spreading sequence used to spread the first data is the length of the symbols available in the group grouped into symbols available in the time unit in which the first data is transmitted.

4. The method according to claim 3, wherein the length of the spreading sequence with which the first data is spread is indicated by the first indication information;

the first indication information indicates the number of groups obtained by grouping symbols available in a time unit for transmitting the first data and the length of the available symbols in each group.

5. The method according to claim 4, wherein the first data is broadcast data, and the first indication information is system information; or

The first data is multicast data, and the first indication information is downlink control information DCI.

6. The method of claim 5, wherein the first indication information is system information, and wherein the system information comprises an on-demand system message OSI.

7. The method of claim 1, wherein the power used for transmitting the spread first data and the power used for transmitting the second data are indicated by the second indication information.

8. The method of claim 7, wherein the second indication information indicates a ratio between power used for transmitting the spread first data and power used for transmitting the second data.

9. The method according to any of claims 7 to 8, wherein the second indication message is a system message.

10. The method of claim 9, wherein the system message comprises an on-demand system message OSI.

11. The method of any one of claims 1, 2, 4-8, and 10, wherein the cyclic prefix length used for transmitting the spread first data is the same as the cyclic prefix length used for transmitting the second data.

12. A data transmission apparatus, comprising:

a processing unit, configured to spread the first data to obtain spread first data;

and the sending unit is used for merging the first data and the second data obtained after the spread spectrum processing of the processing unit to obtain merged data and sending the merged data on time frequency resources, wherein the power used for sending the spread spectrum first data is less than the power used for sending the second data.

13. The apparatus of claim 12, wherein the first data is non-unicast data and the second data is unicast data.

14. The apparatus of claim 12 or 13, wherein the spreading sequence used to spread the first data has a length that is the length of the symbols available in the group that are grouped into symbols available in the time unit in which the first data is transmitted.

15. The apparatus according to claim 14, wherein a length of a spreading sequence employed for spreading the first data is indicated by the first indication information;

16. The apparatus of claim 15, wherein the first data is broadcast data, and the first indication information is system information; or

17. The apparatus of claim 16, wherein the first indication information is system information, and wherein the system information comprises an on-demand system message OSI.

18. The apparatus of claim 12, wherein the power used for transmitting the spread first data and the power used for transmitting the second data are indicated by the second indication information.

19. The apparatus of claim 18, wherein the second indication information indicates a ratio between power used for transmitting the spread first data and power used for transmitting the second data.

20. The apparatus according to any of the claims 18 to 19, wherein the second indication message is a system message.

21. The apparatus of claim 20, wherein the system message comprises an on-demand system message OSI.

22. The apparatus of any one of claims 12, 13, 15-19, and 21, wherein the cyclic prefix length used for transmitting the spread first data is the same as the cyclic prefix length used for transmitting the second data.

23. A data transmission apparatus comprising at least one processor and interface circuitry, wherein the at least one processor is configured to perform the method of any one of claims 1 to 11.

24. A network device comprising the data transmission apparatus of any one of claims 12 to 22.

25. A storage medium for storing a program for performing the method of any one of claims 1 to 11 when executed by a processor.