CN102761877A - Multi-network common-mode method and system - Google Patents
Multi-network common-mode method and system Download PDFInfo
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- CN102761877A CN102761877A CN2011101039857A CN201110103985A CN102761877A CN 102761877 A CN102761877 A CN 102761877A CN 2011101039857 A CN2011101039857 A CN 2011101039857A CN 201110103985 A CN201110103985 A CN 201110103985A CN 102761877 A CN102761877 A CN 102761877A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a multi-network common-mode method and system. GSM (Global System for Mobile Communication) frequency bands serving as subbands of LTE/LTE/A (Long Term Evolution/Long Term Evolution Advanced) are embedded in an LTE/LTE/A system bandwidth; and CDMA (Code Division Multiple Access) signals are directly superpositioned on a GSM band and an LTE/LTE-A frequency band. The multi-network common-mode technology provided by the invention can ensure co-frequency networking of the LTE/LTE-A and the GSM as well as the CDMA, and a single-channel RRU (Radio Remote Unit) simultaneously supports multiple networks, thus the design manufacture cost of the RRU can be effectively lowered, and the problems of low frequency spectrum utilization rate of the GSM and the CDMA and frequency spectrum resource waste caused by protection intervals among intersystems are effectively solved. Meanwhile, the method and system provided by the invention also have the function of lowering engineering cost and hardware cost just like other conventional common-mode schemes, and ensures that the working risk and the implementing difficulty of smoothly evoluting 3G to the LTE/LTE-A are reduced to be minimum.
Description
Technical field
The present invention relates to the communications field, be specifically related to many net common mode method and systems.
Background technology
Along with the development of wireless broadband communication technology and improving constantly of user's request, radio spectrum resources is as a kind of non-renewable resources, and is precious all the more.OFDM (OFDM, Orthogonal FrequencyDivision Multiplexing) technology is high and realization characteristic of simple with its spectrum efficiency, has greatly improved spectrum efficiency.At present, Long Term Evolution (LTE, Long Term Evolution) system and senior LTE (LTE-A, LTE Advanced) system have all adopted the OFDM technology.
Yet global system for mobile communications (GSM, Global System for Mobile communication) system is also with long-time running.The frequency division multiplexing that gsm system adopted (FDM; Frequency DivisionMultiplexing) and time division multiplexing (TDM; Time Division Multiplexing) spectrum efficiency is well below OFDM, thereby makes the good low-frequency band of a large amount of wireless performances to be used effectively; The spectrum efficiency of code division multiple access (CDMA, Code Division Multiple Access) technology also can not be mentioned in the same breath with OFDM.In order to realize the smooth evolution of wireless communication technology, save hardware cost and engineering cost, the common mode technology becomes the focus of realizing evolution.
It is thus clear that; Because GSM network and cdma network are also with long-term existence; Make that the good radio spectrum resources of a large amount of wireless performances can't obtain fully effectively utilizing; Not only the introducing of the wireless communication technology LTE/LTE-A of a new generation can't improve the spectrum efficiency of these frequency bands, also can cause the further waste of frequency spectrum resource at interval for fear of protection between the system that the interference between system is introduced.
Common common mode scheme all is absorbed in reduction construction cost and hardware manufacturing cost, as: colocation site, common antenna feeder, cascode be (RRU, Radio Remote Unite) and base band (BBU, Base Band Unite) etc. frequently, but then has no contribution for spectrum efficiency.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of many net common mode method and systems, wastes problem with the frequency spectrum resource that the protection that solves between GSM, the low and different system of the CDMA availability of frequency spectrum is brought at interval.
In order to address the above problem, technical scheme of the present invention is achieved in that
A kind of many net common mode methods comprise: with the subband of global system for mobile communications GSM frequency band as the senior Long Term Evolution LTE-A of Long Term Evolution LTE/, embed in the system bandwidth of LTE/LTE-A; Code division multiple access CDMA signal directly is superimposed upon on GSM and the LTE/LTE-A frequency band.
Said with the subband embedding LTE/LTE-A system of GSM as LTE/LTE-A, comprising: confirm that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, and said GSM bandwidth is embedded in the fixed position as subband; Wherein, when embedding the GSM bandwidth, avoid static pilot tone and static physical channel in the said LTE/LTE-A system bandwidth; The said static frequency domain position of frequency or physical channel that instructs can not be changed.
Said definite GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, comprising: said GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part embeds in the LTE/LTE-A system down link DL bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Perhaps, said GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the downlink bandwidth of LTE/LTE-A system, and another part is placed on outside the LTE/LTE-A system bandwidth.
When confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth; Further obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value; Judge that whether said GSM bandwidth is less than said LTE/LTE-A system up-link bandwidth; If then embed said GSM bandwidth in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise as subband, a part embeds in the up link of LTE/LTE-A system with said GSM bandwidth, and another part then embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Judging the GSM bandwidth whether during less than said LTE/LTE-A system up-link bandwidth, said LTE/LTE-A system up-link bandwidth for static pilot tone of deduction and static physical channel after remaining uplink bandwidth.
After the GSM bandwidth embedded the LTE/LTE-A system bandwidth as subband, this method further comprised: said LTE/LTE-A system wireless resource key-course for semi-static pilot tone and semi-static physical channel Resources allocation the time, the GSM frequency band of avoiding embedding; Said LTE/LTE-A system media access control layer when being dynamic pilot tone and dynamic physical dispatch channel resource, the GSM frequency band that is using this sub-district of avoiding embedding.
The method that the CDMA signal directly is superimposed upon on GSM and the LTE/LTE-A frequency band is: select CDMA signal stack frequency domain position, and the received power spectrum density PSD of LTE/LTE-A, GSM and the CDMA signal of stack place of control CDMA signal; When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, the CDMA forward link signal is not overlapped with reverse link signal.
Said received power spectrum density satisfies:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus;
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE-A receives PSD, and PSDRxC is the reception PSD of cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
A kind of common mode system of netting comprises frequency band embedding and superposed positions selected cell, power constraint unit more; Wherein,
Said frequency band embeds and the superposed positions selected cell, is used for the subband of GSM frequency band as LTE/LTELTE-A, embeds in the system bandwidth of LTE/LTE-A;
Said power constraint unit is used for the CDMA signal directly is superimposed upon GSM and LTE/LTE-A frequency band.
Said frequency band embeds and the superposed positions selected cell; When GSM is embedded the LTE/LTE-A system as the subband of LTE/LTE-A; Specifically be used for: confirm that the GSM bandwidth embeds the position of LTE/LTE-A system bandwidth, and said GSM bandwidth is embedded in the fixed position as subband; Wherein, when embedding the GSM bandwidth, avoid static pilot tone and static physical channel in the said LTE/LTE-A system bandwidth; The said static frequency domain position of frequency or physical channel that instructs can not be changed.
Said frequency band embeds and the superposed positions selected cell, when confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, specifically is used for: said GSM bandwidth embeds the up link UL bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part embeds in the LTE/LTE-A system down link DL bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Perhaps, said GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the downlink bandwidth of LTE/LTE-A system, and another part is placed on outside the LTE/LTE-A system bandwidth.
Said frequency band embeds and the superposed positions selected cell; When confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth; Be further used for: obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value; Whether judge said GSM bandwidth less than said LTE/LTE-A system up-link bandwidth, if then embed said GSM bandwidth in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise as subband, a part embeds in the up link of LTE/LTE-A system with said GSM bandwidth, and another part then embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Judging the GSM bandwidth whether during less than said LTE/LTE-A system up-link bandwidth, said LTE/LTE-A system up-link bandwidth for static pilot tone of deduction and static physical channel after remaining uplink bandwidth.
This system further comprises LTE/LTE-A system wireless resource key-course, LTE/LTE-A system media access control layer; After the GSM bandwidth embedded the LTE/LTE-A system bandwidth as subband; Said LTE/LTE-A system wireless resource key-course, LTE/LTE-A system media access control layer are respectively applied for: said LTE/LTE-A system wireless resource key-course for semi-static pilot tone and semi-static physical channel Resources allocation the time, the GSM frequency band of avoiding embedding; Said LTE/LTE-A system media access control layer when being dynamic pilot tone and dynamic physical dispatch channel resource, the GSM frequency band that is using this sub-district of avoiding embedding.
When said power constraint unit directly is superimposed upon the CDMA signal on GSM and the LTE/LTE-A frequency band, specifically be used for: select CDMA signal stack frequency domain position, and the reception PSD of LTE/LTE-A, GSM and the CDMA signal of stack place of control CDMA signal; When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, the CDMA forward link signal is not overlapped with reverse link signal.
Said received power spectrum density satisfies:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus;
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE-A receives PSD, and PSDRxC is the reception PSD of cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
Many net common mode technology of the present invention can make LTE/LTE-A and GSM, CDMA identical networking; And can use single channel RRU to support a plurality of networks simultaneously; Effectively reduce the design and manufacture cost of RRU, effectively solve the frequency spectrum resource waste problem that protection is brought at interval between the low and different system of the GSM and the CDMA availability of frequency spectrum; Simultaneously, also take into account the effect that other conventional common mode schemes are saved hardware cost and engineering cost, make the 3G smooth evolution drop to minimum with the enforcement difficulty to the work risk of LTE/LTE-A.
Description of drawings
Fig. 1 is LTE/LTE-A system of the present invention and CDMA, GSM common carrier frequency principle schematic;
Fig. 2 is LTE/LTE-A system and GSM, the CDMA common carrier frequency sketch map of the embodiment of the invention one;
Fig. 3 is LTE/LTE-A system and GSM, the CDMA common carrier frequency sketch map of the embodiment of the invention three;
Fig. 4 is LTE/LTE-A system and GSM, the CDMA common mode system schematic of the embodiment of the invention;
Fig. 5 is many nets common mode general flow chart of the embodiment of the invention.
Embodiment
GSM is a narrowband systems, and CDMA is a spread spectrum system, and LTE/LTE-A is a broadband system.In practical application; Can be with the subband of gsm system bandwidth as LTE/LTE-A; Embed in the system bandwidth of LTE/LTE-A, realized the common mode scheme of GSM and LTE/LTE-A common carrier frequency, the cdma system frequency band directly is superimposed upon on the common carrier frequency of LTE/LTE-A and GSM; Realize GSM, CDMA, LTE/LTE-A three net common carrier frequency common modes, realized GSM as shown in Figure 1, CDMA, many network common carrier frequencies of LTE/LTE-A.
Particularly, in conjunction with the network characteristics separately of GSM, CDMA, LTE/LTE-A, it is following to analyze design process:
GSM is a narrowband systems; LTE/LTE-A is a broadband system; If can avoid under the condition of different system interference, arrowband GSM signal is embedded broadband LTE/LTE-A system, then can influence the systematic function of LTE/LTE-A hardly; Simultaneously the GSM operate as normal be can guarantee, GSM and LTE/LTE-A common carrier frequency common mode realized.CDMA is a spread spectrum system, has hundreds of times spreading gain, and PSD during operate as normal (PowerSpectrum Density, power spectral density) is low, and SINR (Signal Interference Noise Ratio, Signal to Interference plus Noise Ratio) is low; Thereby the CDMA signal that will hang down PSD is superimposed upon on GSM and the LTE/LTE-A signal, and is little to the interference of GSM and LTE/LTE-A, very little to the performance impact of GSM and LTE/LTE-A; And the spreading gain of hundreds of times of cdma systems makes it can bear GSM and LTE/LTE-A fully to its interference that causes with the low characteristics of its work SINR.
For realizing GSM, CDMA, the design of LTE/LTE-A common carrier frequency common mode, can the subband of GSM frequency band as LTE/LTE-A be embedded in the system bandwidth of LTE/LTE-A, and the CDMA signal directly is superimposed upon on GSM and the LTE/LTE-A frequency band.
Need to prove that said GSM comprises as the subband embedding LTE/LTE-A system of LTE/LTE-A:
Confirm that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, and said GSM bandwidth is embedded in the fixed position as subband; Wherein, when embedding the GSM bandwidth, avoid static pilot tone and static physical channel in the said LTE/LTE-A system bandwidth; Said static state refers to the frequency domain position of pilot tone or physical channel and can not change.
The particular location that embeds is: said GSM bandwidth embeds in up link (UL, the Up Links) bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part embeds in LTE/LTE-A system down link (DL, the Down Links) bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Perhaps, said GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the downlink bandwidth of LTE/LTE-A system, and another part is placed on outside the LTE/LTE-A system bandwidth.
And; When confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth; Can obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value; Whether judge said GSM bandwidth less than said LTE/LTE-A system up-link bandwidth, if then embed said GSM bandwidth in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise as subband, a part embeds in the uplink bandwidth of LTE/LTE-A system with said GSM bandwidth, and another part then embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth.Judging the GSM bandwidth whether during less than said LTE/LTE-A system up-link bandwidth, said LTE/LTE-A system up-link bandwidth for static pilot tone of deduction and static physical channel after remaining uplink bandwidth.
After the GSM bandwidth embedded the LTE/LTE-A system bandwidth as subband; Said LTE/LTE-A system wireless resource key-course (RRC; Ratio Resources Control) is being semi-static pilot tone and semi-static physical channel (semi-static referring to; Pilot frequency locations or physical channel time-frequency domain position can change through the configuration of RRC) during Resources allocation, the GSM frequency band that can avoid embedding; The said LTE/LTE-A medium access control (MAC of system; Media Access Control) layer (is dynamically referring to for dynamic pilot tone and dynamic physical channel; Pilot frequency locations or physical channel time-frequency domain position can be through MAC scheduling) during scheduling of resource, the GSM frequency band that is using this sub-district that can avoid embedding.
Have again, when directly being superimposed upon the CDMA signal on GSM and the LTE/LTE-A frequency band, can select CDMA signal stack frequency domain position, and the received power spectrum density of LTE/LTE-A, GSM and the CDMA signal of stack place of control CDMA signal.Certainly, when selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, the CDMA forward link signal is not overlapped with reverse link signal.
In addition, during the received power spectrum density of LTE/LTE-A, GSM and the CDMA signal of stack place of control CDMA signal, need to satisfy:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus, belongs to the existing parameter in the existing wireless system.
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), and PSDRxC is the reception PSD (unit is dBm) of cdma system, and SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (dBm of unit).
Provide several preferred embodiments below in conjunction with accompanying drawing, in order to more detailed elaboration implementation procedure of the present invention.
Embodiment one
Present embodiment is an example with GSM, CDMA and LTE common mode, specifically comprises:
At first, confirm that the GSM bandwidth embeds the position of LTE system bandwidth, and said GSM bandwidth is embedded in said definite position as subband;
Consider that the LTE downlink pilot spreads all over whole LTE DL bandwidth, for avoiding LTE DL pilot tone and the direct mutual interference of GSM signal, GSM bandwidth embedded location is selected on the LTE up-line system bandwidth as far as possible;
Physical Uplink Control Channel (the PUCCH of LTE up link; Physical Uplink ControlChannel) is positioned at UL system bandwidth two ends; For avoiding disturbing between GSM signal and PUCCH, when the GSM bandwidth embedded the LTE up link, embedded location should be avoided the PUCCH private resource; All the other positions all can be used as embedded location, and are as shown in Figure 2.
Secondly,, after the GSM bandwidth is embedded the LTE system bandwidth, can also embed bandwidth to GSM and handle, be specifically related to following content in order further to reduce the interference between two systems:
LTE Radio Resource control (RRC) divides timing in semi-static pilot tone and semi-static physical channel (like Physical Random Access Channel), need avoid the GSM frequency band;
LTE MAC cannot use the GSM frequency band that is being used when dynamically pilot tone and dynamic physical channel (like Physical Uplink Shared Channel) are dispatched.
At last, the CDMA frequency spectrum directly is superimposed upon on GSM and the LTE signal, it is not overlapped with reverse link signal that said stack need be satisfied the CDMA forward link signal; And make the received power spectrum density of LTE/LTE-A, GSM and CDMA signal of CDMA signal stack place satisfy:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus, belongs to existing parameter in the existing wireless system.
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), and PSDRxC is the reception PSD (unit is dBm) of cdma system, and SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (dBm of unit).
Life period sequencing not between above-mentioned CDMA frequency band additive process and the GSM frequency band telescopiny, wherein arbitrary process can at first be carried out, and perhaps two processes are carried out simultaneously.
Embodiment two
Present embodiment is an example with GSM, CDMA and LTE common mode, specifically comprises:
At first, confirm that the GSM bandwidth embeds the position of LTE system bandwidth, and said GSM bandwidth is embedded in said definite position as subband;
In the present embodiment; Suppose that the GSM bandwidth does not satisfy the condition on the LTE system up-link bandwidth that embeds fully; At this moment, half the embedding LTE system up-link bandwidth with the GSM bandwidth embeds LTE system down link bandwidth with second half and perhaps is placed on outside the LTE system bandwidth.
Wherein, In the time of in being partially submerged into LTE system down link bandwidth; Because the LTE downlink pilot spreads all over whole LTE DL bandwidth; May have interference between GSM signal and the LTE downlink pilot, can consider disturbed condition and implementation complexity this moment, and whether carry out interference elimination treatment; And outside partly being placed on the LTE system bandwidth time, can avoid the interference of GSM signal and LTE system signal this moment, but can only realize the partial fusion of GSM bandwidth and LTE system bandwidth.
Secondly,, after the GSM bandwidth is embedded the LTE system bandwidth, can also handle, be specifically related to following content the LTE/LTE-A resource that GSM embeds the bandwidth place in order further to reduce the interference between two systems:
LTE RRC divides timing in semi-static pilot tone and semi-static physical channel, need avoid the GSM frequency band;
LTE MAC cannot use the GSM frequency band that is being used when dynamic pilot tone and dynamic physical channel dispatch.
The CDMA frequency spectrum directly is superimposed upon on GSM and the LTE signal, and it is not overlapped with reverse link signal that said stack need be satisfied the CDMA forward link signal; And make the received power spectrum density of LTE/LTE-A, GSM and CDMA signal of CDMA signal stack place satisfy:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus, belongs to existing parameter in the existing wireless system.
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), and PSDRxC is the reception PSD (unit is dBm) of cdma system, and SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (dBm of unit).
Life period sequencing not between above-mentioned CDMA frequency band additive process and the GSM frequency band telescopiny, wherein arbitrary process can at first be carried out, and perhaps two processes are carried out simultaneously.
Embodiment three
Present embodiment is an example with GSM, CDMA and LTE-A common mode, specifically comprises:
At first, confirm that the GSM bandwidth embeds the position of LTE-A system bandwidth, and said GSM bandwidth is embedded in said definite position as subband;
To avoid between LTE-A and GSM disturbing is principle, and present embodiment is embedded into the GSM bandwidth in the LTE-A uplink bandwidth, and GSM bandwidth embedded location avoids Physical Uplink Control Channel, as shown in Figure 3.
Need to prove that the system bandwidth of GSM is generally 1M to 2M, the LTE system bandwidth is generally 1.4M to 20M, and the LTE-A system bandwidth is generally 100M.It is thus clear that generally speaking, arrowband GSM bandwidth can be embedded in the uplink bandwidth of LTE-A system usually.Because the LTE-A system bandwidth is made up of a plurality of carrier components (CC, Component Carrier), so under the protection of guaranteeing GSM situation at interval, can the GSM bandwidth be embedded in the corresponding carrier component of LTE-A system up-link.
Secondly,, after the GSM bandwidth is embedded the LTE-A system bandwidth, can also handle, be specifically related to following content the LTE resource that GSM embeds the bandwidth place in order further to reduce the interference between two systems:
The RRC of LTE-A system divides timing in semi-static pilot tone and semi-static physical channel (as: Physical Random Access Channel), need avoid the GSM frequency band;
The MAC of LTE-A system cannot use the GSM frequency band that is being used when dynamically pilot tone and dynamic physical channel resource (as: Physical Uplink Shared Channel) are dispatched.
The CDMA frequency spectrum directly is superimposed upon on GSM and the LTE signal, and it is not overlapped with reverse link signal that said stack need be satisfied the CDMA forward link signal, and make the received power spectrum density of LTE/LTE-A, GSM and CDMA signal of CDMA signal stack place satisfy:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus, belongs to existing parameter in the existing wireless system.
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), and PSDRxC is the reception PSD (unit is dBm) of cdma system, and SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is the PSD (dBm of unit) of white Gaussian noise.
Life period sequencing not between above-mentioned CDMA frequency band additive process and the GSM frequency band telescopiny, wherein arbitrary process can at first be carried out, and perhaps two processes are carried out simultaneously.
Visible by above-described the inventive method, can remedy the availability of frequency spectrum deficiency of GSM and CDMA, the shortcoming that spectrum efficiency is low through the LTE/LTE-A system, greatly improved spectrum efficiency; And saved the RRU transmission channel number under many networks common mode environment, reduced the RRU design and manufacture cost; Taken into account conventional common mode scheme simultaneously, saved other hardware cost and engineering cost, made GSM drop to minimum to the system upgrade cost of LTE/LTE-A again to CDMA; In addition, can also avoid the interference between a plurality of systems through selecting GSM bandwidth embedded location and receiving PSD control as far as possible.
Embodiment four
GSM of the present invention, CDMA and LTE/LTE-A common mode system; The GSM bandwidth is embedded in the LTE/LTE-A system bandwidth as subband; And the CDMA signal is superimposed upon on GSM and the LTE/LTE-A common mode frequency spectrum, realize said GSM, CDMA and LTE/LTE-A system common carrier frequency.
As shown in Figure 4, said system specifically comprises:
Frequency band embeds and superposed positions selected cell 401; Be used for confirming that the GSM bandwidth embeds the position and the CDMA signal superposed positions of LTE/LTE-A system bandwidth; And said GSM bandwidth embedded in the fixed position as subband; So that with the subband of GSM frequency band, embed in the system bandwidth of LTE/LTE-A as LTE/LTE-A.
Wherein, when embedding the GSM bandwidth, can avoid static pilot tone and/or static physical channel in the said LTE/LTE-A system bandwidth; Said CDMA signal superposed positions need satisfy the CDMA forward link signal and not superpose with reverse link signal.
LTE/LTE-A resource configuration unit 402 is used for the embedded location definite according to said GSM frequency band flush mounting, the GSM frequency band of when MRP, avoiding embedding; The GSM frequency band of when scheduling of resource, avoiding embedding that is using.
Wherein, GSM frequency band flush mounting embed the GSM bandwidth the position can for:
Said GSM bandwidth embeds in the uplink bandwidth of LTE/LTE-A system as subband; Perhaps,
Said GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Perhaps,
Said GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Perhaps,
Said GSM bandwidth is as subband, and a part embeds in the downlink bandwidth of LTE/LTE-A system, and another part is placed on outside the LTE/LTE-A system bandwidth.
In order to reduce interference, when confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, preferably select to embed like upper/lower positions:
Obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value, whether judge said GSM bandwidth, if then embed said GSM bandwidth in the uplink bandwidth of LTE/LTE-A system as subband less than said LTE/LTE-A system up-link bandwidth; Otherwise as subband, a part embeds in the up link of LTE/LTE-A system with said GSM bandwidth, and another part embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth.
When the signal of control CDMA signal stack place receives PSD, can satisfy so that stack place of CDMA signal receives PSD:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus, belongs to existing parameter in the existing wireless system.
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), and PSDRxC is the reception PSD (unit is dBm) of cdma system, and SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (dBm of unit).
Visible in conjunction with above each embodiment, many net common mode operation thinkings of the present invention can be represented flow process as shown in Figure 5, and this flow process may further comprise the steps:
Step 510:, embed in the system bandwidth of LTE/LTE-A with the subband of GSM frequency band as LTE/LTE-A.
Step 520: the CDMA signal directly is superimposed upon on GSM and the LTE/LTE-A frequency band.
Need to prove, life period sequencing not between step 510 and the step 520, wherein arbitrary step can at first be carried out, and perhaps two steps are carried out simultaneously.
And described cdma system can comprise all cdma systems (like CDMA-IS95, CDMA-2000, TD-SCDMA, WCDMA etc.); It is thus clear that the net of three in foregoing description common mode is embodiment, in practical application, can uses same procedure and realize many net common modes.
Visible in sum; No matter be method or system; Many net common mode technology of the present invention can make LTE/LTE-A and GSM, CDMA identical networking; And can use single channel RRU to support a plurality of networks simultaneously, effectively reduce the design and manufacture cost of RRU, efficiently solve the frequency spectrum resource waste problem that the protection between the low and different system of the GSM and the CDMA availability of frequency spectrum is brought at interval; Simultaneously, also taken into account the saving hardware cost of other conventional common mode schemes and the effect of engineering cost, made the 3G smooth evolution drop to minimum with the enforcement difficulty to the work risk of LTE/LTE-A.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (14)
1. net the common mode method more one kind, it is characterized in that this method comprises:
With the subband of global system for mobile communications GSM frequency band, embed in the system bandwidth of LTE/LTE-A as the senior Long Term Evolution LTE-A of Long Term Evolution LTE/; Code division multiple access CDMA signal directly is superimposed upon on GSM and the LTE/LTE-A frequency band.
2. method according to claim 1 is characterized in that, and is said with the subband embedding LTE/LTE-A system of GSM as LTE/LTE-A, comprising:
Confirm that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, and said GSM bandwidth is embedded in the fixed position as subband; Wherein, when embedding the GSM bandwidth, avoid static pilot tone and static physical channel in the said LTE/LTE-A system bandwidth; The said static frequency domain position of frequency or physical channel that instructs can not be changed.
3. method according to claim 2 is characterized in that, said definite GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, comprising:
Said GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part embeds in the LTE/LTE-A system down link DL bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Perhaps, said GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the downlink bandwidth of LTE/LTE-A system, and another part is placed on outside the LTE/LTE-A system bandwidth.
4. method according to claim 3; It is characterized in that; When confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, further obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value, judge that whether said GSM bandwidth is less than said LTE/LTE-A system up-link bandwidth; If then embed said GSM bandwidth in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise as subband, a part embeds in the up link of LTE/LTE-A system with said GSM bandwidth, and another part then embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth;
Judging the GSM bandwidth whether during less than said LTE/LTE-A system up-link bandwidth, said LTE/LTE-A system up-link bandwidth for static pilot tone of deduction and static physical channel after remaining uplink bandwidth.
5. according to each described method of claim 1 to 4, it is characterized in that, the GSM bandwidth is embedded the LTE/LTE-A system bandwidth as subband after, this method further comprises:
Said LTE/LTE-A system wireless resource key-course when being semi-static pilot tone and semi-static physical channel Resources allocation, the GSM frequency band of avoiding embedding; Said LTE/LTE-A system media access control layer when being dynamic pilot tone and dynamic physical dispatch channel resource, the GSM frequency band that is using this sub-district of avoiding embedding.
6. according to each described method of claim 1 to 4, it is characterized in that the method that the CDMA signal directly is superimposed upon on GSM and the LTE/LTE-A frequency band is:
Select CDMA signal stack frequency domain position, and the received power spectrum density PSD of LTE/LTE-A, GSM and the CDMA signal of stack place of control CDMA signal;
When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, the CDMA forward link signal is not overlapped with reverse link signal.
7. method according to claim 6 is characterized in that, said received power spectrum density satisfies:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus;
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE-A receives PSD, and PSDRxC is the reception PSD of cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
8. the common mode system of net more than a kind is characterized in that, this system comprises that frequency band embeds and superposed positions selected cell, power constraint unit; Wherein,
Said frequency band embeds and the superposed positions selected cell, is used for the subband of GSM frequency band as LTE/LTELTE-A, embeds in the system bandwidth of LTE/LTE-A;
Said power constraint unit is used for the CDMA signal directly is superimposed upon GSM and LTE/LTE-A frequency band.
9. system according to claim 8 is characterized in that, said frequency band embeds and the superposed positions selected cell, and GSM during as the subband embedding LTE/LTE-A system of LTE/LTE-A, specifically is used for:
Confirm that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, and said GSM bandwidth is embedded in the fixed position as subband; Wherein, when embedding the GSM bandwidth, avoid static pilot tone and static physical channel in the said LTE/LTE-A system bandwidth; The said static frequency domain position of frequency or physical channel that instructs can not be changed.
10. system according to claim 9 is characterized in that, said frequency band embeds and the superposed positions selected cell, when confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, specifically is used for:
Said GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part embeds in the LTE/LTE-A system down link DL bandwidth or is placed on outside the LTE/LTE-A system bandwidth; Perhaps, said GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Perhaps, said GSM bandwidth is as subband, and a part embeds in the downlink bandwidth of LTE/LTE-A system, and another part is placed on outside the LTE/LTE-A system bandwidth.
11. system according to claim 10 is characterized in that, said frequency band embeds and the superposed positions selected cell, when confirming that the GSM bandwidth embeds the position in the LTE/LTE-A system bandwidth, is further used for:
Obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value, whether judge said GSM bandwidth, if then embed said GSM bandwidth in the uplink bandwidth of LTE/LTE-A system as subband less than said LTE/LTE-A system up-link bandwidth; Otherwise as subband, a part embeds in the up link of LTE/LTE-A system with said GSM bandwidth, and another part then embeds in the LTE/LTE-A system down link bandwidth or is placed on outside the LTE/LTE-A system bandwidth;
Judging the GSM bandwidth whether during less than said LTE/LTE-A system up-link bandwidth, said LTE/LTE-A system up-link bandwidth for static pilot tone of deduction and static physical channel after remaining uplink bandwidth.
12. to 11 each described systems, it is characterized in that according to Claim 8 this system further comprises LTE/LTE-A system wireless resource key-course, LTE/LTE-A system media access control layer; After the GSM bandwidth embedded the LTE/LTE-A system bandwidth as subband, said LTE/LTE-A system wireless resource key-course, LTE/LTE-A system media access control layer were respectively applied for:
Said LTE/LTE-A system wireless resource key-course when being semi-static pilot tone and semi-static physical channel Resources allocation, the GSM frequency band of avoiding embedding; Said LTE/LTE-A system media access control layer when being dynamic pilot tone and dynamic physical dispatch channel resource, the GSM frequency band that is using this sub-district of avoiding embedding.
13. to 11 each described systems, it is characterized in that according to Claim 8, when said power constraint unit directly is superimposed upon the CDMA signal on GSM and the LTE/LTE-A frequency band, specifically be used for:
Select CDMA signal stack frequency domain position, and the reception PSD of LTE/LTE-A, GSM and the CDMA signal of stack place of control CDMA signal;
When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, the CDMA forward link signal is not overlapped with reverse link signal.
14. system according to claim 13 is characterized in that, said received power spectrum density satisfies:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is the area interference surplus;
That is: PSDRxL＜=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE-A receives PSD, and PSDRxC is the reception PSD of cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016197920A1 (en) * | 2015-10-15 | 2016-12-15 | 中兴通讯股份有限公司 | Interference processing method, terminal, base station, and interference processing system |
| WO2017107013A1 (en) * | 2015-12-21 | 2017-06-29 | 华为技术有限公司 | Resource scheduling method, device and base station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714587A (en) * | 2002-12-19 | 2005-12-28 | 艾利森电话股份有限公司 | Assinging time slots during transmission gaps of a first protocol communication to a second protocol communication |
| CN1993919A (en) * | 2004-06-04 | 2007-07-04 | 高通股份有限公司 | Multiplexing of w-cdma and OFDM signal in a wireless communication system |
| CN101578898A (en) * | 2007-01-15 | 2009-11-11 | Lm爱立信电话有限公司 | Method and radio base station for effective spectrum utilization |
| CN101772030A (en) * | 2009-01-05 | 2010-07-07 | 鼎桥通信技术有限公司 | Method for acquiring time slot proportion of time division duplex (TDD) long term evolution (LTE) system cell in time division synchronous code division multiple access (TD-SCDMA) system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008147273A1 (en) * | 2007-06-01 | 2008-12-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Timesharing between different cellular telephony systems |
| CN101415189B (en) * | 2007-10-16 | 2011-12-07 | 电信科学技术研究院 | Coexistent method for LTE TDD system and TD-SCDMA system |
| CN101635928B (en) * | 2009-08-25 | 2012-02-01 | 华为技术有限公司 | Method, equipment and system for sharing frequency spectrum resource |
-
2011
- 2011-04-25 CN CN201110103985.7A patent/CN102761877B/en active Active
- 2011-11-24 WO PCT/CN2011/082901 patent/WO2012146027A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714587A (en) * | 2002-12-19 | 2005-12-28 | 艾利森电话股份有限公司 | Assinging time slots during transmission gaps of a first protocol communication to a second protocol communication |
| CN1993919A (en) * | 2004-06-04 | 2007-07-04 | 高通股份有限公司 | Multiplexing of w-cdma and OFDM signal in a wireless communication system |
| CN101578898A (en) * | 2007-01-15 | 2009-11-11 | Lm爱立信电话有限公司 | Method and radio base station for effective spectrum utilization |
| CN101772030A (en) * | 2009-01-05 | 2010-07-07 | 鼎桥通信技术有限公司 | Method for acquiring time slot proportion of time division duplex (TDD) long term evolution (LTE) system cell in time division synchronous code division multiple access (TD-SCDMA) system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016197920A1 (en) * | 2015-10-15 | 2016-12-15 | 中兴通讯股份有限公司 | Interference processing method, terminal, base station, and interference processing system |
| WO2017107013A1 (en) * | 2015-12-21 | 2017-06-29 | 华为技术有限公司 | Resource scheduling method, device and base station |
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| CN102761877B (en) | 2015-08-12 |
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