CN103580843A - Channel mapping method and device - Google Patents
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Abstract
The invention provides a channel mapping method and device, and provides a mechanism of channel mapping, wherein the processing resources and the storing resources can be saved in the channel mapping process, and the implementation cost is reduced. The channel mapping method comprises the steps that the bit data cached in a first cache are read, and the scrambling processing is carried out on the bit data to generate first data; layering mapping is carried out on the first data to obtain second data mapped on at least one layer; RE mapping is carried out on the second data to obtain third data mapped on a virtual resource block corresponding to the layer; modulation is carried out on the third data to obtain complex value data, and precoding is carried out on the complex value data to obtain antenna data mapped on at least one antenna port; the antenna data are cached through a second cache; the antenna data in the second cache are read, and orthogonal frequency division multiplexing signals are generated based on the antenna data. The channel mapping method and device are used for saving the storing resources and the processing resources in the channel mapping.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of channel mapping method and apparatus.
Background technology
At present; at the LTE(Long of base station side Term Evolution; Long Term Evolution) in down link; to descending PDSCH(Physical Downlink Shared Channel; downlink physical shared channel) link has the demand of high-performance, low memory consumption; due to above-mentioned requirements, conventionally can adopt in the prior art hardware accelerator to realize framework and replace software to realize framework.
Because the signal in physical layer transmission is all OFDM(Orthogonal Frequency Division Multiplexing, OFDM) symbol, when so hardware accelerator carries out the descending PDSCH processing of LTE in the prior art, the data of physical channel will be mapped to from transmission channel, after the processing of a series of bottom, deliver on antenna port, the transmission of eating dishes without rice or wine again, concrete handling process as shown in Figure 1.
First, the Bit data in code word is carried out to scrambling, different scramblers is used in each community, so that the interference randomization of community, thereby the interference between each community reduced; Complete after the scrambling process of Bit data, again the Bit data after scrambling is modulated, Bit data after scrambling is modulated to complex-valued data, then the complex-valued data in each code word is carried out to layer mapping, complex value modulating data is mapped on one or more layer; And different according to the antenna technology of selecting, and adopt different layer mappings.Complete after the layer mapping of complex-valued data, complex-valued data after layer mapping is carried out to precoding, complex-valued data is mapped on corresponding antenna port, again the complex-valued data after precoding is carried out to resource particle mapping, complex-valued data is mapped on virtual resource blocks, and then each antenna port data is generated to complex-valued data time domain OFDM signal.
Above-mentioned prior art is to carry out one by one the processing of above-mentioned steps according to code word, and according to OFDM symbol order, processes from front to back after all complex-valued datas are all ready to, and generates ofdm signal.Therefore need to be at RE(Resource Element, resource particle) after mapping, place TTI RAM(Transmission Time Interval Random Access Memory, Transmission Time Interval random access memory) store TTI (Transmission Time Interval, Transmission Time Interval) complex-valued data of level, concrete structure as shown in Figure 2.
In Fig. 2, after resource particle mapping, TTI level complex-valued data is stored, to each antenna port data is generated to complex-valued data time domain OFDM signal.
Owing to being all complex-valued data processing in layer mapping and resource particle mapping, and also need to store TTI level complex-valued data after resource particle mapping, so not only can cause larger resource consumption when processing, and can cause larger data storage resource consumption, improve the cost of realizing simultaneously.
Summary of the invention
Embodiments of the invention provide a kind of channel mapping method and apparatus, and a kind of mechanism of channel mapping is provided, and can guarantee that resource and storage resources are processed in the saving in channel mapping process, reduce and realize cost.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, provides a kind of channel mapping device, and described device comprises:
The first buffer memory, for the Bit data of buffer memory;
Scrambling unit, for reading the Bit data of the first buffer memory buffer memory, and carries out scrambling to described Bit data and generates the first data;
Layer map unit, for described the first data being carried out to layer mapping, obtains being mapped in the second data at least one layer;
Resource particle RE map unit, for described the second data are carried out to RE mapping, obtains being mapped in the 3rd data on the virtual resource blocks that described layer is corresponding;
Modulation and precoding unit, for described the 3rd data are modulated and obtained complex-valued data, and carry out precoding to described complex-valued data, obtains being mapped in the antenna data at least one antenna port;
The second buffer memory, for antenna data described in buffer memory;
Signal generation unit, for reading the described antenna data of described the second buffer memory, and based on described antenna data generating orthogonal frequency-division multiplex singal.
In conjunction with first aspect, in the possible implementation of first aspect the first, described scrambling unit specifically for:
Reading the Bit data of the first symbol of buffer memory in described the first buffer memory, according to the code word of every layer of mapping of each default resource particle RE, is j the Bit data assigned code font size that layer is corresponding of i RE in described the first symbol;
According to described j layer assigned code font size and described j Bit data length corresponding to layer, obtain described j the required Bit data of layer mapping;
Described j the required Bit data of layer mapping carried out to scrambling, obtain described the first data, described the first data are the Bit data after the scrambling that described j layer is corresponding; Wherein the initial value of i, j is 1, and i, j are positive integer.
In conjunction with the possible implementation of the first of first aspect, in the possible implementation of the second, describedly described j the required Bit data of layer mapping shine upon to processing comprise:
Described layer map unit specifically for:
Bit data after scrambling corresponding to described j layer mapping is carried out to layer mapping, obtain described the second data, described the second data are the Bit data after the layer mapping that described j layer is corresponding.
In conjunction with the possible practising way of the second of first aspect, in the third possible implementation, described RE map unit specifically for:
Bit data after layer mapping corresponding to described j layer is carried out to RE mapping, generate the Bit data on virtual resource blocks that is mapped in of described j layer;
Obtain described j layer be mapped in after the Bit data on virtual resource blocks, the Bit data of j+1 layer correspondence is repeated to described scrambling, described layer mapping and described RE mapping, until obtain the Bit data on virtual resource blocks that is mapped in that all layer of described i RE reflects, obtain described the 3rd data, described the 3rd data are that described i RE is mapped in the Bit data on virtual resource blocks.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, described modulation and precoding unit specifically for:
Described i RE is mapped in to Bit data on virtual resource blocks, and to carry out modulation conversion be complex-valued data;
Described complex-valued data, after precoding, then is mapped to corresponding antenna port, obtains being mapped in the antenna data of described i the RE at least one antenna port;
At the antenna data that obtains described i RE, the Bit data that i+1 RE is mapped on virtual resource blocks repeats described modulation, described precoding, obtain being mapped in the antenna data of described i+1 the RE at least one antenna port, until obtain the antenna data of all RE of described the first symbol.
In conjunction with first aspect in the 4th kind of arbitrary possible implementation of first aspect, in the 5th kind of possible implementation,
Described the first symbol is orthogonal frequency division multiplex OFDM symbol;
The code font size of every layer of mapping of described each RE is to the mapping relations of RE, to obtain to layer according to code word, and the mapping relations of described code word to layer to RE set in advance.
In conjunction with first aspect in the 4th kind of arbitrary possible implementation of first aspect, in the 6th kind of possible implementation,
Described the first buffer memory is Transmission Time Interval TTI level buffer memory; Described the second buffer memory is symbol level buffer memory;
Described the first buffer memory and described the second buffer memory are ping-pong structure buffer memory.
Second aspect, provides a kind of channel mapping method, and described method comprises:
Read the Bit data of buffer memory in the first buffer memory, and described Bit data is carried out to scrambling generate the first data;
Described the first data are carried out to layer mapping, obtain being mapped in the second data at least one layer;
Described the second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that described layer is corresponding;
Described the 3rd data are modulated and obtained complex-valued data, and described complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port;
By using antenna data described in the second buffer memory buffer memory;
Read the described antenna data in described the second buffer memory, and based on described antenna data generating orthogonal frequency-division multiplex singal.
In conjunction with second aspect, in the possible implementation of second aspect the first, described in read the Bit data of buffer memory in the first buffer memory, and described Bit data is carried out to scrambling generate the first data and comprise:
Reading the Bit data of the first symbol of buffer memory in described the first buffer memory, according to the code word of every layer of mapping of each default RE, is j the Bit data assigned code font size that layer is corresponding of i RE in described the first symbol;
According to described j layer assigned code font size and described j Bit data length corresponding to layer, obtain described j the required Bit data of layer mapping;
Described j the required Bit data of layer mapping carried out to scrambling, obtain described the first data, described the first data are the Bit data after the scrambling that described j layer is corresponding; Wherein the initial value of i, j is 1, and i, j are positive integer.
In conjunction with the possible implementation of second aspect the first, in the possible implementation of the second, described described the first data are carried out to layer mapping, the second data that obtain being mapped at least one layer comprise:
Bit data after scrambling corresponding to described j layer mapping is carried out to layer mapping, obtain described the second data, described the second data are the Bit data after the layer mapping that described j layer is corresponding.
In conjunction with the possible implementation of the second of second aspect, in the third possible implementation, described described the second data are carried out to resource particle RE mapping, the 3rd data that obtain being mapped on the virtual resource blocks that described layer is corresponding comprise:
Bit data after layer mapping corresponding to described j layer is carried out to RE mapping, generate the Bit data on virtual resource blocks that is mapped in of described j layer;
Obtain described j layer be mapped in after the Bit data on virtual resource blocks, the Bit data of j+1 layer correspondence is repeated to described scrambling, described layer mapping and described RE mapping, until obtain the Bit data on virtual resource blocks that is mapped in that all layer of described i RE reflects, obtain described the 3rd data, described the 3rd data are that described i RE is mapped in the Bit data on virtual resource blocks.
The third possible implementation in conjunction with second aspect, in the 4th kind of possible implementation, described described the 3rd data are modulated and obtained complex-valued data, and described complex-valued data is carried out to precoding, the antenna data that obtains being mapped at least one antenna port comprises:
Described i RE is mapped in to Bit data on virtual resource blocks, and to carry out modulation conversion be complex-valued data;
Described complex-valued data, after precoding, then is mapped to corresponding antenna port, obtains being mapped in the antenna data of described i the RE at least one antenna port;
At the antenna data that obtains described i RE, the Bit data that i+1 RE is mapped on virtual resource blocks repeats described modulation, described precoding, obtain being mapped in the antenna data of described i+1 the RE at least one antenna port, until obtain the antenna data of all RE of described the first symbol.
The 4th kind of arbitrary possible implementation in conjunction with second aspect to second aspect, in the 5th kind of possible implementation,
Described the first symbol is orthogonal frequency division multiplex OFDM symbol;
The code font size of every layer of mapping of described each default RE is to the mapping relations of RE, to obtain to layer according to code word, and the mapping relations of described code word to layer to RE set in advance.
The invention provides a kind of channel mapping method and apparatus, channel mapping device reads the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generates the first data; The first data are carried out to layer mapping, obtain being mapped in the second data at least one layer; The second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding; The 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port; By using the second buffer memory buffer memory antenna data; Read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.Thereby a kind of mechanism of channel mapping is provided, can have guaranteed that resource and storage resources are processed in the saving in channel mapping process, reduced and realize cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of a kind of existing channel mapping method;
Fig. 2 is the structural representation of existing another kind of channel mapping device;
The schematic flow sheet of a kind of channel mapping method that Fig. 3 provides for the embodiment of the present invention;
The schematic flow sheet of a kind of channel mapping method that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of channel mapping device that Fig. 5 provides for the embodiment of the present invention;
The structural representation of a kind of channel mapping device that Fig. 6 provides for the embodiment of the present invention;
The structural representation of a kind of channel mapping device that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of channel mapping method, be applied to a kind of channel mapping device, as shown in Figure 3, described method comprises:
101, read the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generate the first data.
102, the first data are carried out to layer mapping, obtain being mapped in the second data at least one layer.
103, the second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding.
104, the 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port.
105, by using the second buffer memory buffer memory antenna data.
106, read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.
The mapping relations of code word to layer to RE set in advance in embodiments of the present invention, the code font size that obtains every layer of mapping of each RE specifically can pass through: first, due to after layer mapping and RE mapping, a code word can be mapped on one or more layers, and each layer of meeting is mapped on a RE, so first obtain code word to layer to the mapping relations of RE by software layer, then according to code word, the mapping relations to layer to RE calculate yard font size that every one deck that each RE is corresponding shines upon.Wherein, code font size is the numbering of code word being carried out in order to distinguish different code words.
In addition, it should be noted that in embodiments of the present invention, " first " in the first symbol not refers in particular to a certain symbol, neither represent the sequence number of symbol, is only used to conveniently distinguish with other symbols.
The invention provides a kind of channel mapping method, read the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generate the first data; The first data are carried out to layer mapping, obtain being mapped in the second data at least one layer; The second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding; The 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port; By using the second buffer memory buffer memory antenna data; Read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.Thereby a kind of mechanism of channel mapping is provided, can have guaranteed that resource and storage resources are processed in the saving in channel mapping process, reduced and realize cost.
In order to make those skilled in the art can more clearly understand the technical scheme that the embodiment of the present invention provides, below by specific embodiment, the another kind of channel mapping method that another embodiment of the present invention is provided is elaborated, and take in the present embodiment LTE system as example, and symbol is all OFDM symbol, in addition, for aspect explanation, in embodiment below, by resource particle referred to as RE, as shown in Figure 4, the method comprises:
201, be j the layer assigned code font size of i RE of k OFDM symbol.
Exemplary, suppose that pending data are 26 code words, and corresponding 13 OFDM symbols, these 26 code words are pre-stored at TTI RAM(Random Access Memory, random access memory) in (TTI RAM is the buffer memory of the ping-pong structure of TTI level), first by software layer, obtain the mapping relations of code word to layer to RE, then according to code word, to layer to the mapping relations of RE, calculate the code font size that every one deck that each RE is corresponding shines upon, obtain yard font size of every layer of each RE.
Can be just then j of i RE layer of assigned code font size of k OFDM symbol according to the code font size of every layer of each RE obtaining, wherein, k, j, i is positive integer, and k, j, the initial value of i is all 1.
Code font size and this layer of corresponding Bit data length of 202, according to j the layer of i RE of k OFDM symbol, distributing are obtained this layer of Bit data that mapping is required.
Exemplary, j Bit data length corresponding to layer is that the modulation technique adopting according to j layer is obtained, the Bit data length that for example QPSK is corresponding is 2bit, and the Bit data length that 16QAM is corresponding is 4bit, and the Bit data length that 64QAM is corresponding is 6bit.
Then, the code font size distributing according to j layer and j Bit data length corresponding to layer are obtained this layer of Bit data that mapping is required.
203, j the required Bit data of layer mapping of i RE of k OFDM symbol carried out to scrambling.
204,, after scrambling, j the required Bit data of layer mapping of i RE of k OFDM symbol carried out to layer mapping.
205,, after layer mapping, j the required Bit data of layer mapping of i RE of k OFDM symbol carried out to RE mapping.
Concrete, exactly j the required Bit data of layer mapping to i RE of k OFDM symbol is mapped on virtual resource blocks (Resource Block, RB).
After j the required Bit data of layer mapping of i RE carries out RE mapping, j is added to 1, the next layer of i RE is carried out to 201～205, until all layers of i RE all complete RE mapping.All layer of i RE of k OFDM symbol is completed after RE mapping, just obtaining the Bit data after the mapping of i RE.
206, to the processing of modulating and encode of the Bit data after the mapping of i RE of k OFDM symbol.
Concrete, the Bit data of i RE (i.e. all layers of i the RE Bit data after shining upon) is carried out to modulation treatment, the Bit data of i RE is converted into complex-valued data, thereby obtains the complex-valued data after the modulation of i RE.
After completing modulation, the complex-valued data after the modulation of i RE is carried out to precoding processing, then the complex-valued data after the precoding of i RE is mapped to corresponding antenna port, obtain i the antenna data that RE is corresponding.
207, preserve i the antenna data that RE is corresponding of k OFDM symbol.
After the antenna data of i RE of k OFDM symbol is preserved, i is added to 1, the next RE execution 201～206 to i RE, until the antenna data corresponding to all RE of k OFDM symbol all preserved.At antenna data corresponding to all RE of k OFDM symbol, all complete after preservation, just obtained the antenna data of k OFDM symbol.
Wherein, the antenna data that each RE is corresponding is kept at the buffer memory of the ping-pong structure of SYMBOL ARM(symbol level) in.
208, according to the antenna data of k OFDM symbol, generate transmit (ofdm signal).
After transmitting according to the antenna data generation at k OFDM symbol, k is added to 1, next OFDM symbol is carried out to 201～207, until generate corresponding the transmitting of all OFDM symbols.In sum, the structure of the mapping device in the present embodiment can be as shown in Figure 5.
The invention provides a kind of channel mapping method, read the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generate the first data; The first data are carried out to layer mapping, obtain being mapped in the second data at least one layer; The second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding; The 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port; By using the second buffer memory buffer memory antenna data; Read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.Thereby a kind of mechanism of channel mapping is provided, can have guaranteed that resource and storage resources are processed in the saving in channel mapping process, reduced and realize cost.
The invention provides a kind of channel mapping device 1, as shown in Figure 6, this channel mapping device 1 comprises:
The first buffer memory 11, for the Bit data of buffer memory.
Scrambling unit 12, for reading the Bit data of the first buffer memory 11 buffer memorys, and carries out scrambling to Bit data and generates the first data.
Modulation and precoding unit 15, for the 3rd data are modulated and obtained complex-valued data, and carry out precoding to complex-valued data, obtains being mapped in the antenna data at least one antenna port.
The second buffer memory 16, for buffer memory antenna data.
Optionally, scrambling unit 12 also for:
Reading the Bit data of the first symbol of buffer memory in the first buffer memory 11, according to the code word of every layer of mapping of each default resource particle RE, is j the Bit data assigned code font size that layer is corresponding of i RE in the first symbol;
According to j layer assigned code font size and j Bit data length corresponding to layer, obtain j the required Bit data of layer mapping;
J the required Bit data of layer mapping carried out to scrambling, obtain the first data, the first data are j layer of Bit data after corresponding scrambling; Wherein the initial value of i, j is 1, and i, j are positive integer.
Optionally, layer map unit 13 also for:
The Bit data that j layer shone upon after corresponding scrambling carries out layer mapping, obtains the second data, and the second data are the Bit data after j layer corresponding to layer shines upon.
Optionally, RE map unit 14 also for:
Bit data after j layer corresponding to layer shone upon carries out RE mapping, generates the Bit data on virtual resource blocks that is mapped in of j layer;
Obtain j layer be mapped in after the Bit data on virtual resource blocks, the Bit data of j+1 layer correspondence is repeated to scrambling, layer mapping and RE mapping, until obtain the Bit data on virtual resource blocks that is mapped in that all layer of i RE reflects, obtain the 3rd data, the 3rd data are that i RE is mapped in the Bit data on virtual resource blocks.
Optionally, modulation and precoding unit 15 also for;
I RE is mapped in to Bit data on virtual resource blocks, and to carry out modulation conversion be complex-valued data;
Complex-valued data, after precoding, then is mapped to corresponding antenna port, obtains being mapped in the antenna data of i RE at least one antenna port;
At the antenna data that obtains i RE, the Bit data that i+1 RE is mapped on virtual resource blocks repeats modulation, precoding, obtain being mapped in the antenna data of i+1 RE at least one antenna port, until obtain the antenna data of all RE of the first symbol.
Optionally,
The first symbol is orthogonal frequency division multiplex OFDM symbol;
The code font size of every layer of mapping of each RE is to the mapping relations of RE, to obtain to layer according to code word, and the mapping relations of code word to layer to RE set in advance.
Optionally,
The first buffer memory 11 is Transmission Time Interval TTI level buffer memory; The second buffer memory 16 is symbol level buffer memory;
The first buffer memory 11 and the second buffer memory 16 are ping-pong structure buffer memory.
The invention provides a kind of channel mapping device, this channel mapping device reads the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generates the first data; The first data are carried out to layer mapping, obtain being mapped in the second data at least one layer; The second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding; The 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port; By using the second buffer memory buffer memory antenna data; Read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.Thereby a kind of mechanism of channel mapping is provided, can have guaranteed that resource and storage resources are processed in the saving in channel mapping process, reduced and realize cost.
The invention provides a kind of channel mapping device 2, as shown in Figure 7, this channel mapping device 2 comprises: bus 21, and the processor 22, memory 23 and the interface 24 that are connected to bus, wherein interface 24 for other net element communications; Memory 23 is for storing instruction 231; Processor 22 carry out instructions 231 for:
Read the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generate the first data;
The first data are carried out to layer mapping, obtain being mapped in the second data at least one layer;
The second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding;
The 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port;
By using the second buffer memory buffer memory antenna data;
Read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.
Optionally, processor 22 carry out instructions 231 can also be for:
Reading the Bit data of the first symbol of buffer memory in the first buffer memory, according to the code word of every layer of mapping of each default resource particle RE, is j the Bit data assigned code font size that layer is corresponding of i RE in the first symbol;
According to j layer assigned code font size and j Bit data length corresponding to layer, obtain j the required Bit data of layer mapping;
J the required Bit data of layer mapping carried out to scrambling, obtain the first data, the first data are j layer of Bit data after corresponding scrambling; Wherein the initial value of i, j is 1, and i, j are positive integer.
Optionally, processor 22 carry out instructions 231 can also be for:
The Bit data that j layer shone upon after corresponding scrambling carries out layer mapping, obtains the second data, and the second data are the Bit data after j layer corresponding to layer shines upon.
Optionally, processor 22 carry out instructions 231 can also be for:
Bit data after j layer corresponding to layer shone upon carries out RE mapping, generates the Bit data on virtual resource blocks that is mapped in of j layer;
Obtain j layer be mapped in after the Bit data on virtual resource blocks, the Bit data of j+1 layer correspondence is repeated to scrambling, layer mapping and RE mapping, until obtain the Bit data on virtual resource blocks that is mapped in that all layer of i RE reflects, obtain the 3rd data, the 3rd data are that i RE is mapped in the Bit data on virtual resource blocks.
Optionally, processor 22 carry out instructions 231 can also be for:
I RE is mapped in to Bit data on virtual resource blocks, and to carry out modulation conversion be complex-valued data;
Complex-valued data, after precoding, then is mapped to corresponding antenna port, obtains being mapped in the antenna data of i RE at least one antenna port;
At the antenna data that obtains i RE, the Bit data that i+1 RE is mapped on virtual resource blocks repeats modulation, precoding, obtain being mapped in the antenna data of i+1 RE at least one antenna port, until obtain the antenna data of all RE of the first symbol.
Optionally, the first symbol is orthogonal frequency division multiplex OFDM symbol;
The code font size of every layer of mapping of each RE is to the mapping relations of RE, to obtain to layer according to code word, and the mapping relations of code word to layer to RE set in advance.
The invention provides a kind of channel mapping device, this channel mapping device reads the Bit data of buffer memory in the first buffer memory, and Bit data is carried out to scrambling generates the first data; The first data are carried out to layer mapping, obtain being mapped in the second data at least one layer; The second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that layer is corresponding; The 3rd data are modulated and obtained complex-valued data, and complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port; By using the second buffer memory buffer memory antenna data; Read the antenna data in the second buffer memory, and based on antenna data generating orthogonal frequency-division multiplex singal.Thereby a kind of mechanism of channel mapping is provided, can have guaranteed that resource and storage resources are processed in the saving in channel mapping process, reduced and realize cost.
In the several embodiment that provide in the application, should be understood that disclosed method and apparatus can be realized by another way.For example, device embodiment described above is only schematic, for example, the division of unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
Unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit comprises, also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that also can adopt hardware to add SFU software functional unit realizes.
The integrated unit that the above-mentioned form with SFU software functional unit realizes, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprise some instructions with so that computer equipment (can be personal computer, server, or the network equipment etc.) carry out the part steps of each embodiment method of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-Only Memory, be called for short ROM), the various media that can be program code stored such as random access memory (Random Access Memory is called for short RAM), magnetic disc or CD.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection range of described claim.
Claims (11)
1. a channel mapping device, is characterized in that, described device comprises:
The first buffer memory, for the Bit data of buffer memory;
Scrambling unit, for reading the Bit data of the first buffer memory buffer memory, and carries out scrambling to described Bit data and generates the first data;
Layer map unit, for described the first data being carried out to layer mapping, obtains being mapped in the second data at least one layer;
Resource particle mapping RE unit, for described the second data are carried out to RE mapping, obtains being mapped in the 3rd data on the virtual resource blocks that described layer is corresponding;
Modulation and precoding unit, for described the 3rd data are modulated and obtained complex-valued data, and carry out precoding to described complex-valued data, obtains being mapped in the antenna data at least one antenna port;
The second buffer memory, for antenna data described in buffer memory;
Signal generation unit, for reading the described antenna data of described the second buffer memory, and based on described antenna data generating orthogonal frequency-division multiplex singal.
2. device according to claim 1, is characterized in that, described scrambling unit specifically for:
Reading the Bit data of the first symbol of buffer memory in described the first buffer memory, according to the code word of every layer of mapping of each default resource particle RE, is j the Bit data assigned code font size that layer is corresponding of i RE in described the first symbol;
According to described j layer assigned code font size and described j Bit data length corresponding to layer, obtain described j the required Bit data of layer mapping;
Described j the required Bit data of layer mapping carried out to scrambling, obtain described the first data, described the first data are the Bit data after the scrambling that described j layer is corresponding; Wherein the initial value of i, j is 1, and i, j are positive integer.
3. device according to claim 1 and 2, is characterized in that, described RE map unit specifically for:
Bit data after j layer corresponding to layer shone upon carries out RE mapping, generates the Bit data on virtual resource blocks that is mapped in of described j layer;
Obtain described j layer be mapped in after the Bit data on virtual resource blocks, the Bit data of j+1 layer correspondence is repeated to described scrambling, described layer mapping and described RE mapping, until obtain the Bit data on virtual resource blocks that is mapped in that all layer of described i RE reflects, obtain described the 3rd data, described the 3rd data are that described i RE is mapped in the Bit data on virtual resource blocks.
4. according to the device described in any one in claims 1 to 3, it is characterized in that, described modulation and precoding unit specifically for:
I RE is mapped in to Bit data on virtual resource blocks, and to carry out modulation conversion be complex-valued data;
Described complex-valued data, after precoding, then is mapped to corresponding antenna port, obtains being mapped in the antenna data of described i the RE at least one antenna port;
At the antenna data that obtains described i RE, the Bit data that i+1 RE is mapped on virtual resource blocks repeats described modulation, described precoding, obtain being mapped in the antenna data of described i+1 the RE at least one antenna port, until obtain the antenna data of all RE of described the first symbol.
5. according to the arbitrary described device of claim 1 to 4, it is characterized in that, comprising:
Described the first symbol is orthogonal frequency division multiplex OFDM symbol;
The code font size of every layer of mapping of described each default RE is to the mapping relations of RE, to obtain to layer according to code word, and the mapping relations of described code word to layer to RE set in advance.
6. according to the arbitrary described device of claim 1 to 5, it is characterized in that,
Described the first buffer memory is Transmission Time Interval TTI level buffer memory; Described the second buffer memory is symbol level buffer memory;
Described the first buffer memory and described the second buffer memory are ping-pong structure buffer memory.
7. a channel mapping method, is characterized in that, described method comprises:
Read the Bit data of buffer memory in the first buffer memory, and described Bit data is carried out to scrambling generate the first data;
Described the first data are carried out to layer mapping, obtain being mapped in the second data at least one layer;
Described the second data are carried out to resource particle RE mapping, obtain being mapped in the 3rd data on the virtual resource blocks that described layer is corresponding;
Described the 3rd data are modulated and obtained complex-valued data, and described complex-valued data is carried out to precoding, obtain being mapped in the antenna data at least one antenna port;
By using antenna data described in the second buffer memory buffer memory;
Read the described antenna data in described the second buffer memory, and based on described antenna data generating orthogonal frequency-division multiplex singal.
8. method according to claim 7, is characterized in that, reads the Bit data of buffer memory in the first buffer memory, and described Bit data is carried out to scrambling generates the first data and comprise:
Reading the Bit data of the first symbol of buffer memory in described the first buffer memory, according to the code word of every layer of mapping of each default RE, is j the Bit data assigned code font size that layer is corresponding of i RE in described the first symbol;
According to described j layer assigned code font size and described j Bit data length corresponding to layer, obtain described j the required Bit data of layer mapping;
Described j the required Bit data of layer mapping carried out to scrambling, obtain described the first data, described the first data are the Bit data after the scrambling that described j layer is corresponding; Wherein the initial value of i, j is 1, and i, j are positive integer.
9. according to the method described in claim 7 or 8, it is characterized in that, described described the second data are carried out to resource particle RE mapping, the 3rd data that obtain being mapped on the virtual resource blocks that described layer is corresponding comprise:
Bit data after layer mapping corresponding to described j layer is carried out to RE mapping, generate the Bit data on virtual resource blocks that is mapped in of described j layer;
Obtain described j layer be mapped in after the Bit data on virtual resource blocks, the Bit data of j+1 layer correspondence is repeated to described scrambling, described layer mapping and described RE mapping, until obtain the Bit data on virtual resource blocks that is mapped in that all layer of described i RE reflects, obtain described the 3rd data, described the 3rd data are that described i RE is mapped in the Bit data on virtual resource blocks.
10. according to the method described in any one in claim 7 to 9, it is characterized in that, described described the 3rd data are modulated and obtained complex-valued data, and described complex-valued data is carried out to precoding, the antenna data that obtains being mapped at least one antenna port comprises:
Described i RE is mapped in to Bit data on virtual resource blocks, and to carry out modulation conversion be complex-valued data;
Described complex-valued data, after precoding, then is mapped to corresponding antenna port, obtains being mapped in the antenna data of described i the RE at least one antenna port;
At the antenna data that obtains described i RE, the Bit data that i+1 RE is mapped on virtual resource blocks repeats described modulation, described precoding, obtain being mapped in the antenna data of described i+1 the RE at least one antenna port, until obtain the antenna data of all RE of described the first symbol.
11. according to the arbitrary described method of claim 7 to 10, it is characterized in that, comprising:
Described the first symbol is orthogonal frequency division multiplex OFDM symbol;
The code font size of every layer of mapping of described each default RE is to the mapping relations of RE, to obtain to layer according to code word, and the mapping relations of described code word to layer to RE set in advance.
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