CN102761877B - Many nets common mode method and system - Google Patents
Many nets common mode method and system Download PDFInfo
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- CN102761877B CN102761877B CN201110103985.7A CN201110103985A CN102761877B CN 102761877 B CN102761877 B CN 102761877B CN 201110103985 A CN201110103985 A CN 201110103985A CN 102761877 B CN102761877 B CN 102761877B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Abstract
The invention discloses a kind of many nets common mode method and system, all can, using the subband of GSM frequency band as LTE/LTELTE-A, embed in the system bandwidth of LTE/LTE-A; CDMA signal is directly superimposed upon on GSM and LTE/LTE-A frequency band.Many nets common mode technology of the present invention can make LTE/LTE-A and GSM, CDMA identical networking, and multiple network can be supported with single channel RRU simultaneously, effectively can reduce the design and manufacture cost of RRU, effectively solve the frequency spectrum resource waste problem that the protection interval between the low and different system of GSM and the CDMA availability of frequency spectrum is brought; Meanwhile, also take into account the effect that other conventional common mode schemes save hardware cost and engineering cost, make 3G smooth evolution drop to minimum to the work risk of LTE/LTE-A and enforcement difficulty.
Description
Technical field
The present invention relates to the communications field, be specifically related to many nets common mode method and system.
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, precious all the more.OFDM (OFDM, Orthogonal FrequencyDivision Multiplexing) technology is with its spectrum efficiency height and realize simple feature, drastically increases spectrum efficiency.At present, Long Term Evolution (LTE, Long Term Evolution) system and senior LTE (LTE-A, LTE Advanced) system all have employed OFDM technology.
But global system for mobile communications (GSM, Global System for Mobile communication) system is also by long-time running.Frequency division multiplexing (the FDM that gsm system adopts, Frequency DivisionMultiplexing) and time division multiplexing (TDM, Time Division Multiplexing) spectrum efficiency well below OFDM, thus the excellent low-frequency band of a large amount of wireless performance cannot 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, common mode technology becomes the focus realizing evolution.
Visible; because GSM network and cdma network are also by long-term existence; make the excellent radio spectrum resources of a large amount of wireless performance cannot obtain fully effective utilization; not only the introducing of the wireless communication technology LTE/LTE-A of a new generation cannot improve the spectrum efficiency of these frequency bands, protects interval also can cause the further waste of frequency spectrum resource in order to avoid between the system that the interference between system is introduced.
Common common mode scheme is all absorbed in reduction construction cost and hardware manufacturing cost, as: colocation site, altogether antenna feeder, cascode (RRU frequently, Radio Remote Unite) and base band (BBU, Base Band Unite) etc., but for spectrum efficiency then without any contribution.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of many nets common mode method and system, the frequency spectrum resource waste problem brought with the protection interval solved between the low and different system of GSM, CDMA availability of frequency spectrum.
In order to solve the problem, technical scheme of the present invention is achieved in that
A kind of many nets common mode method, comprising: using the subband of global system for mobile communications GSM frequency band as the senior Long Term Evolution LTE-A of Long Term Evolution LTE/, embeds in the system bandwidth of LTE/LTE-A; Code division multiple access CDMA signal is directly superimposed upon on GSM and LTE/LTE-A frequency band.
Described using the subband embedding LTE/LTE-A system of GSM as LTE/LTE-A, comprising: determine that GSM bandwidth embeds the position in LTE/LTE-A system bandwidth, and described GSM bandwidth is embedded in fixed position as subband; Wherein, when embedding GSM bandwidth, the static pilot tone in described LTE/LTE-A system bandwidth and static physical channel is avoided; Described static state instructs frequently or the frequency domain position of physical channel can not be changed.
The described position determined in GSM bandwidth embedding LTE/LTE-A system bandwidth, comprising: described GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Or described GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, another part embeds in LTE/LTE-A system down link DL bandwidth or is placed on outside LTE/LTE-A system bandwidth; Or described GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Or described 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 LTE/LTE-A system bandwidth.
When determining the position in GSM bandwidth embedding LTE/LTE-A system bandwidth, further acquisition GSM bandwidth and LTE/LTE-A system up-link bandwidth value, judge whether described GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, if so, then described GSM bandwidth is embedded in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise using described GSM bandwidth as subband, a part embeds in the up link of LTE/LTE-A system, and another part then embeds in LTE/LTE-A system downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth; When judging whether GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, described LTE/LTE-A system up-link bandwidth is remaining uplink bandwidth after the static pilot tone of deduction and static physical channel.
GSM bandwidth embedded after LTE/LTE-A system bandwidth as subband, the method comprises further: described LTE/LTE-A system wireless Resource Control Layer, when for semi-static pilot tone and semi-static physical channel Resources allocation, avoids the GSM frequency band embedded; Described LTE/LTE-A system media access control layer, when for dynamic pilot and dynamic physical dispatch channel resource, avoids the GSM frequency band that using of this community embedded.
The method be directly superimposed upon by CDMA signal on GSM and LTE/LTE-A frequency band is: select CDMA Signal averaging frequency domain position, and the received power spectrum density PSD of LTE/LTE-A, GSM and CDMA signal at control CDMA Signal averaging place; When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, CDMA forward link signal is not overlapped with reverse link signal.
Described received power spectrum density meets:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin;
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is the reception PSD that LTE/LTE-A receives that PSD, PSDRxC are cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
A kind of many nets common mode system, comprises frequency band and embeds and superposed positions selected cell, Power Constraint element; Wherein,
Described frequency band embeds and superposed positions selected cell, for using the subband of GSM frequency band as LTE/LTELTE-A, embeds in the system bandwidth of LTE/LTE-A;
Described Power Constraint element, for being directly superimposed upon GSM and LTE/LTE-A frequency band by CDMA signal.
Described frequency band embeds and superposed positions selected cell, using GSM as LTE/LTE-A subband embed LTE/LTE-A system time, specifically for: determine that GSM bandwidth embeds the position in LTE/LTE-A system bandwidth, and described GSM bandwidth is embedded in fixed position as subband; Wherein, when embedding GSM bandwidth, the static pilot tone in described LTE/LTE-A system bandwidth and static physical channel is avoided; Described static state instructs frequently or the frequency domain position of physical channel can not be changed.
Described frequency band embeds and superposed positions selected cell, when determining the position in GSM bandwidth embedding LTE/LTE-A system bandwidth, specifically for: described GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Or described GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, another part embeds in LTE/LTE-A system down link DL bandwidth or is placed on outside LTE/LTE-A system bandwidth; Or described GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Or described 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 LTE/LTE-A system bandwidth.
Described frequency band embeds and superposed positions selected cell, when determining the position that GSM bandwidth embeds in LTE/LTE-A system bandwidth, be further used for: obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value, judge whether described GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, if so, then described GSM bandwidth is embedded in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise using described GSM bandwidth as subband, a part embeds in the up link of LTE/LTE-A system, and another part then embeds in LTE/LTE-A system downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth; When judging whether GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, described LTE/LTE-A system up-link bandwidth is remaining uplink bandwidth after the static pilot tone of deduction and static physical channel.
This system comprises LTE/LTE-A system wireless Resource Control Layer, LTE/LTE-A system media access control layer further; GSM bandwidth is embedded after LTE/LTE-A system bandwidth as subband, described LTE/LTE-A system wireless Resource Control Layer, LTE/LTE-A system media access control layer are respectively used to: described LTE/LTE-A system wireless Resource Control Layer, when for semi-static pilot tone and semi-static physical channel Resources allocation, avoids the GSM frequency band embedded; Described LTE/LTE-A system media access control layer, when for dynamic pilot and dynamic physical dispatch channel resource, avoids the GSM frequency band that using of this community embedded.
When CDMA signal is directly superimposed upon on GSM and LTE/LTE-A frequency band by described Power Constraint element, specifically for: select CDMA Signal averaging frequency domain position, and the reception PSD of LTE/LTE-A, GSM and CDMA signal at control CDMA Signal averaging place; When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, CDMA forward link signal is not overlapped with reverse link signal.
Described received power spectrum density meets:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin;
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is the reception PSD that LTE/LTE-A receives that PSD, PSDRxC are cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
Many nets common mode technology of the present invention can make LTE/LTE-A and GSM, CDMA identical networking, and multiple network can be supported with single channel RRU simultaneously, the design and manufacture cost of effective reduction RRU, effectively solves the frequency spectrum resource waste problem protecting interval to bring between the low and different system of GSM and the CDMA availability of frequency spectrum; Meanwhile, also take into account the effect that other conventional common mode schemes save hardware cost and engineering cost, make 3G smooth evolution drop to minimum to the work risk of LTE/LTE-A and enforcement difficulty.
Accompanying drawing explanation
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, CDMA common carrier frequency schematic diagram of the embodiment of the present invention one;
Fig. 3 is LTE/LTE-A system and GSM, CDMA common carrier frequency schematic diagram of the embodiment of the present invention three;
Fig. 4 is LTE/LTE-A system and GSM, CDMA common mode system schematic of the embodiment of the present invention;
Fig. 5 is many nets common mode general flow chart of the embodiment of the present invention.
Embodiment
GSM is narrowband systems, and CDMA is spread spectrum system, and LTE/LTE-A is broadband system.In actual applications, can using the subband of gsm system bandwidth as LTE/LTE-A, embed in the system bandwidth of LTE/LTE-A, achieve the common mode scheme of GSM and LTE/LTE-A common carrier frequency, cdma system frequency band is directly superimposed upon in the common carrier frequency of LTE/LTE-A and GSM, realize GSM, CDMA, LTE/LTE-A tri-net common carrier frequency common mode, achieve GSM, CDMA, LTE/LTE-A many network common carrier frequencies as shown in Figure 1.
Specifically, in conjunction with the respective network characteristics of GSM, CDMA, LTE/LTE-A, analysis and designation process is as follows:
GSM is narrowband systems, LTE/LTE-A is broadband system, if can under the condition avoiding different system interference, narrowband GSM signals is embedded broadband LTE/LTE-A system, then affect the systematic function of LTE/LTE-A hardly, can ensure that GSM normally works simultaneously, realize GSM and LTE/LTE-A common carrier frequency common mode.CDMA is spread spectrum system, has the spreading gain of hundreds of times, and during normal work, PSD (PowerSpectrum Density, power spectral density) is low, and SINR (Signal Interference Noise Ratio, Signal to Interference plus Noise Ratio) is low; Thus by the CDMA Signal averaging of low PSD on GSM and LTE/LTE-A signal, little to the interference of GSM and LTE/LTE-A, very micro-to the performance impact of GSM and LTE/LTE-A; And the interference that the spreading gain of cdma system hundreds of times and the low feature of its work SINR make it can bear GSM and LTE/LTE-A completely to cause it.
For realizing the design of GSM, CDMA, LTE/LTE-A common carrier frequency common mode, the subband of GSM frequency band as LTE/LTE-A can be embedded in the system bandwidth of LTE/LTE-A, and CDMA signal is directly superimposed upon on GSM and LTE/LTE-A frequency band.
It should be noted that, described GSM comprises as the subband embedding LTE/LTE-A system of LTE/LTE-A:
Determine that GSM bandwidth embeds the position in LTE/LTE-A system bandwidth, and described GSM bandwidth is embedded in fixed position as subband; Wherein, when embedding GSM bandwidth, the static pilot tone in described LTE/LTE-A system bandwidth and static physical channel is avoided; The frequency domain position that described static state refers to pilot tone or physical channel can not be changed.
The particular location carrying out embedding is: described GSM bandwidth embeds in up link (UL, the Up Links) bandwidth of LTE/LTE-A system as subband; Or described 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, Down Links) bandwidth or is placed on outside LTE/LTE-A system bandwidth; Or described GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Or described 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 LTE/LTE-A system bandwidth.
And, when determining the position in GSM bandwidth embedding LTE/LTE-A system bandwidth, GSM bandwidth and LTE/LTE-A system up-link bandwidth value can be obtained, judge whether described GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, if so, then described GSM bandwidth is embedded in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise using described GSM bandwidth as subband, a part embeds in the uplink bandwidth of LTE/LTE-A system, and another part then embeds in LTE/LTE-A system downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth.When judging whether GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, described LTE/LTE-A system up-link bandwidth is remaining uplink bandwidth after the static pilot tone of deduction and static physical channel.
GSM bandwidth is embedded after LTE/LTE-A system bandwidth as subband, described LTE/LTE-A system wireless Resource Control Layer (RRC, Ratio Resources Control) (semi-staticly to refer to for semi-static pilot tone and semi-static physical channel, pilot frequency locations or physical channel time-frequency domain position can be changed by the configuration of RRC) Resources allocation time, can avoid embed GSM frequency band; Described LTE/LTE-A system media access control (MAC, Media Access Control) layer (dynamically referring to for dynamic pilot and dynamic physical channel, pilot frequency locations or physical channel time-frequency domain position can be dispatched by MAC) scheduling of resource time, the GSM frequency band that using of this community embedded can be avoided.
Further, when being directly superimposed upon on GSM and LTE/LTE-A frequency band by CDMA signal, CDMA Signal averaging frequency domain position can be selected, and the received power spectrum density of LTE/LTE-A, GSM and CDMA signal at control CDMA Signal averaging place.Certainly, when selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, 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 CDMA signal at control CDMA Signal averaging place, need meet:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin, belongs to the existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), PSDRxC is the reception PSD (unit is dBm) of cdma system, SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (unit dBm).
Several preferred embodiment is provided, in order to set forth implementation procedure of the present invention in more detail below in conjunction with accompanying drawing.
Embodiment one
The present embodiment, for GSM, CDMA and LTE common mode, specifically comprises:
First, determine that GSM bandwidth embeds the position of LTE system bandwidth, and described GSM bandwidth is embedded in the described position determined as subband;
Consider that LTE downlink pilot is throughout whole LTE DL bandwidth, for avoiding LTE DL pilot tone and GSM signal directly to disturb mutually, GSM bandwidth embedded location is selected on LTE uplink system bandwidth as far as possible;
Physical Uplink Control Channel (the PUCCH of LTE up link, Physical Uplink ControlChannel) be positioned at UL system bandwidth two ends, for avoiding disturbing between GSM signal and PUCCH, when GSM bandwidth embeds LTE up link, embedded location should avoid PUCCH private resource, all the other positions all can be used as embedded location, as shown in Figure 2.
Secondly, in order to reduce the interference between two systems further, after GSM bandwidth is embedded LTE system bandwidth, bandwidth can also be embedded to GSM and processing, being specifically related to following content:
LTE wireless heterogeneous networks (RRC), when semi-static pilot tone and semi-static physical channel (as Physical Random Access Channel) are distributed, needs to avoid GSM frequency band;
LTE MAC, when dynamic pilot and dynamic physical channel (as Physical Uplink Shared Channel) are dispatched, cannot use by the GSM frequency band used.
Finally, be directly superimposed upon by CDMA frequency spectrum on GSM and LTE signal, it is not overlapped with reverse link signal that described superposition need meet CDMA forward link signal; And the received power spectrum density of LTE/LTE-A, GSM and CDMA signal at CDMA Signal averaging place is met:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), PSDRxC is the reception PSD (unit is dBm) of cdma system, SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (unit dBm).
Not life period sequencing between above-mentioned CDMA frequency band additive process and GSM frequency band telescopiny, wherein first arbitrary process can carry out, or two processes are carried out simultaneously.
Embodiment two
The present embodiment, for GSM, CDMA and LTE common mode, specifically comprises:
First, determine that GSM bandwidth embeds the position of LTE system bandwidth, and described GSM bandwidth is embedded in the described position determined as subband;
In the present embodiment, suppose that GSM bandwidth does not meet the condition embedded completely on LTE system uplink bandwidth, now, the half of GSM bandwidth is embedded LTE system uplink bandwidth, second half is embedded LTE system downlink bandwidth or is placed on outside LTE system bandwidth.
Wherein, when being partially submerged in LTE system downlink bandwidth, because LTE downlink pilot is throughout whole LTE DL bandwidth, interference may be there is between GSM signal and LTE downlink pilot, now can consider disturbed condition and implementation complexity, and whether carry out interference elimination treatment; And when being partly placed on LTE system bandwidth and being outer, now can avoid the interference of GSM signal and LTE system signal, but the partial fusion of GSM bandwidth and LTE system bandwidth can only be realized.
Secondly, in order to reduce the interference between two systems further, after GSM bandwidth being embedded LTE system bandwidth, the LTE/LTE-A resource that GSM embeds bandwidth place can also be processed, being specifically related to following content:
LTE RRC, when semi-static pilot tone and semi-static physical channel are distributed, needs to avoid GSM frequency band;
LTE MAC, when dynamic pilot and dynamic physical channel dispatch, cannot use by the GSM frequency band used.
Directly be superimposed upon by CDMA frequency spectrum on GSM and LTE signal, it is not overlapped with reverse link signal that described superposition need meet CDMA forward link signal; And the received power spectrum density of LTE/LTE-A, GSM and CDMA signal at CDMA Signal averaging place is met:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), PSDRxC is the reception PSD (unit is dBm) of cdma system, SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (unit dBm).
Not life period sequencing between above-mentioned CDMA frequency band additive process and GSM frequency band telescopiny, wherein first arbitrary process can carry out, or two processes are carried out simultaneously.
Embodiment three
The present embodiment, for GSM, CDMA and LTE-A common mode, specifically comprises:
First, determine that GSM bandwidth embeds the position of lte-a system bandwidth, and described GSM bandwidth is embedded in the described position determined as subband;
To avoid disturbing between LTE-A and GSM into principle, GSM bandwidth is embedded in LTE-A uplink bandwidth by the present embodiment, and GSM bandwidth embedded location avoids Physical Uplink Control Channel, as shown in Figure 3.
It should be noted that, the system bandwidth of GSM is generally 1M to 2M, and LTE system bandwidth is generally 1.4M to 20M, and lte-a system bandwidth is generally 100M.Visible, generally, arrowband GSM bandwidth can be embedded in the uplink bandwidth of lte-a system usually.Because lte-a system bandwidth is made up of multiple carrier component (CC, Component Carrier), so when guaranteeing the protection interval of GSM, GSM bandwidth can be embedded in the corresponding carrier component of lte-a system up link.
Secondly, in order to reduce the interference between two systems further, after GSM bandwidth being embedded lte-a system bandwidth, the LTE resource that GSM embeds bandwidth place can also be processed, being specifically related to following content:
Lte-a system RRC, when semi-static pilot tone and semi-static physical channel (as: Physical Random Access Channel) are distributed, needs to avoid GSM frequency band;
Lte-a system MAC, when dynamic pilot and dynamic physical channel resource (as: Physical Uplink Shared Channel) are dispatched, cannot use by the GSM frequency band used.
Directly be superimposed upon by CDMA frequency spectrum on GSM and LTE signal, it is not overlapped with reverse link signal that described superposition need meet CDMA forward link signal, and the received power spectrum density of LTE/LTE-A, GSM and CDMA signal at CDMA Signal averaging place is met:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), PSDRxC is the reception PSD (unit is dBm) of cdma system, SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is the PSD (unit dBm) of white Gaussian noise.
Not life period sequencing between above-mentioned CDMA frequency band additive process and GSM frequency band telescopiny, wherein first arbitrary process can carry out, or two processes are carried out simultaneously.
From above-described the inventive method, the shortcoming that the availability of frequency spectrum is not enough, spectrum efficiency is low of GSM and CDMA can be made up by LTE/LTE-A system, drastically increase spectrum efficiency; And the RRU transmission channel number saved under Multi net voting common mode environment, reduce RRU design and manufacture cost; Taken into account conventional common mode scheme simultaneously, saved other hardware cost and engineering cost, the system upgrade cost making GSM to CDMA arrive LTE/LTE-A again drops to minimum; In addition, by selecting GSM bandwidth embedded location and carry out reception PSD to control, the interference between multiple system can also be avoided as far as possible.
Embodiment four
GSM of the present invention, CDMA and LTE/LTE-A common mode system, GSM bandwidth is embedded in LTE/LTE-A system bandwidth as subband, and by CDMA Signal averaging on GSM and LTE/LTE-A common mode frequency spectrum, realize described GSM, CDMA and LTE/LTE-A system common carrier frequency.
As shown in Figure 4, described system specifically comprises:
Frequency band embeds and superposed positions selected cell 401, for determining that GSM bandwidth embeds position in LTE/LTE-A system bandwidth and CDMA Signal averaging position, and described GSM bandwidth is embedded in fixed position as subband, so that using the subband of GSM frequency band as LTE/LTE-A, embed in the system bandwidth of LTE/LTE-A.
Wherein, when embedding GSM bandwidth, the static pilot tone in described LTE/LTE-A system bandwidth and/or static physical channel can be avoided; Described CDMA Signal averaging position, need meet CDMA forward link signal and not superpose with reverse link signal.
LTE/LTE-A resource configuration unit 402, for the embedded location determined according to described GSM frequency band flush mounting, avoids the GSM frequency band embedded when MRP; The GSM frequency band used embedded is avoided when scheduling of resource.
Wherein, the position of GSM frequency band flush mounting embedding GSM bandwidth can be:
Described GSM bandwidth embeds in the uplink bandwidth of LTE/LTE-A system as subband; Or,
Described 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 downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth; Or,
Described GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Or,
Described 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 LTE/LTE-A system bandwidth.
In order to reduce interference, when determining the position in GSM bandwidth embedding LTE/LTE-A system bandwidth, preferably select such as upper/lower positions embeds:
Obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value, judge whether described GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, if so, then described GSM bandwidth is embedded in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise using described GSM bandwidth as subband, a part embeds in the up link of LTE/LTE-A system, and another part embeds in LTE/LTE-A system downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth.
Power Constraint element 403, for the Signal reception PSD at control CDMA Signal averaging place, to be directly superimposed upon CDMA signal on GSM and LTE/LTE-A frequency band.
During the Signal reception PSD at control CDMA Signal averaging place, CDMA Signal averaging place can be made to receive PSD and to meet:
PSDRxC-PSDRxL-Noise＞＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin, belongs to existing parameter in existing wireless system.
That is: PSDRxL <=PSDRxC-Noise-SINRC-InterferenceMargin;
Wherein, PSDRxL is that LTE/LTE receives PSD (unit is dBm), PSDRxC is the reception PSD (unit is dBm) of cdma system, SINRC is the input SINR thresholding (unit is dB) of cdma system, and Noise is white Gaussian noise PSD (unit dBm).
Visible in conjunction with above each embodiment, many nets common mode operation thinking of the present invention can represent flow process as shown in Figure 5, and this flow process comprises the following steps:
Step 510: using the subband of GSM frequency band as LTE/LTE-A, embeds in the system bandwidth of LTE/LTE-A.
Step 520: CDMA signal is directly superimposed upon on GSM and LTE/LTE-A frequency band.
It should be noted that, not life period sequencing between step 510 and step 520, wherein first arbitrary step can carry out, or two steps are carried out simultaneously.
Further, described cdma system can comprise all cdma systems (as CDMA-IS95, CDMA-2000, TD-SCDMA, WCDMA etc.); Visible, three net common modes in foregoing description are embodiment, can apply same procedure in actual applications and realize many nets common mode.
Visible in sum, no matter be method or system, many nets common mode technology of the present invention can make LTE/LTE-A and GSM, CDMA identical networking, and multiple network can be supported with single channel RRU simultaneously, effectively reduce the design and manufacture cost of RRU, efficiently solve the frequency spectrum resource waste problem brought at the protection interval between the low and different system of GSM and the CDMA availability of frequency spectrum; Meanwhile, also take into account the saving hardware cost of other conventional common mode schemes and the effect of engineering cost, make 3G smooth evolution drop to minimum to the work risk of LTE/LTE-A and enforcement difficulty.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (14)
1. the common mode of net a more than method, it is characterized in that, the method comprises:
Using 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 is directly superimposed upon on GSM and LTE/LTE-A frequency band;
Wherein, when embedding GSM bandwidth, the static pilot tone in described LTE/LTE-A system bandwidth and static physical channel is avoided; Described static state instructs frequently or the frequency domain position of physical channel can not be changed.
2. method according to claim 1, is characterized in that, described using the subband embedding LTE/LTE-A system of GSM as LTE/LTE-A, comprising:
Determine that GSM bandwidth embeds the position in LTE/LTE-A system bandwidth, and described GSM bandwidth is embedded in fixed position as subband.
3. method according to claim 2, is characterized in that, the described position determined in GSM bandwidth embedding LTE/LTE-A system bandwidth, comprising:
Described GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Or described GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, another part embeds in LTE/LTE-A system down link DL bandwidth or is placed on outside LTE/LTE-A system bandwidth; Or described GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Or described 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 LTE/LTE-A system bandwidth.
4. method according to claim 3, it is characterized in that, when determining the position in GSM bandwidth embedding LTE/LTE-A system bandwidth, further acquisition GSM bandwidth and LTE/LTE-A system up-link bandwidth value, judge whether described GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, if so, then described GSM bandwidth is embedded in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise using described GSM bandwidth as subband, a part embeds in the up link of LTE/LTE-A system, and another part then embeds in LTE/LTE-A system downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth;
When judging whether GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, described LTE/LTE-A system up-link bandwidth is remaining uplink bandwidth after the static pilot tone of deduction and static physical channel.
5. the method according to any one of Claims 1-4, is characterized in that, GSM bandwidth embedded after LTE/LTE-A system bandwidth as subband, the method comprises further:
Described LTE/LTE-A system wireless Resource Control Layer, when for semi-static pilot tone and semi-static physical channel Resources allocation, avoids the GSM frequency band embedded; Described LTE/LTE-A system media access control layer, when for dynamic pilot and dynamic physical dispatch channel resource, avoids the GSM frequency band that using of this community embedded.
6. the method according to any one of Claims 1-4, is characterized in that, the method be directly superimposed upon by CDMA signal on GSM and LTE/LTE-A frequency band is:
Select CDMA Signal averaging frequency domain position, and the received power spectrum density PSD of LTE/LTE-A, GSM and CDMA signal at control CDMA Signal averaging place;
When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, CDMA forward link signal is not overlapped with reverse link signal.
7. method according to claim 6, is characterized in that, described received power spectrum density meets:
PSDRxC-PSDRxL–Noise>＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin;
That is: PSDRxL<=PSDRxC – Noise – SINRC-InterferenceMargin;
Wherein, PSDRxL is the reception PSD that LTE/LTE-A receives that PSD, PSDRxC are cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
8. the common mode of net a more than system, is characterized in that, this system comprises frequency band and embeds and superposed positions selected cell, Power Constraint element; Wherein,
Described frequency band embeds and superposed positions selected cell, for using the subband of GSM frequency band as LTE/LTELTE-A, embeds in the system bandwidth of LTE/LTE-A; Wherein, when embedding GSM bandwidth, the static pilot tone in described LTE/LTE-A system bandwidth and static physical channel is avoided; Described static state instructs frequently or the frequency domain position of physical channel can not be changed;
Described Power Constraint element, for being directly superimposed upon GSM and LTE/LTE-A frequency band by CDMA signal.
9. system according to claim 8, is characterized in that, described frequency band embeds and superposed positions selected cell, during using GSM as the subband embedding LTE/LTE-A system of LTE/LTE-A, specifically for:
Determine that GSM bandwidth embeds the position in LTE/LTE-A system bandwidth, and described GSM bandwidth is embedded in fixed position as subband.
10. system according to claim 9, is characterized in that, described frequency band embeds and superposed positions selected cell, when determining the position in GSM bandwidth embedding LTE/LTE-A system bandwidth, specifically for:
Described GSM bandwidth embeds in the up link UL bandwidth of LTE/LTE-A system as subband; Or described GSM bandwidth is as subband, and a part embeds in the uplink bandwidth of LTE/LTE-A system, another part embeds in LTE/LTE-A system down link DL bandwidth or is placed on outside LTE/LTE-A system bandwidth; Or described GSM bandwidth embeds in the downlink bandwidth of LTE/LTE-A system as subband; Or described 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 LTE/LTE-A system bandwidth.
11. systems according to claim 10, is characterized in that, described frequency band embeds and superposed positions selected cell, when determining the position that GSM bandwidth embeds in LTE/LTE-A system bandwidth, are further used for:
Obtain GSM bandwidth and LTE/LTE-A system up-link bandwidth value, judge whether described GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, if so, then described GSM bandwidth is embedded in the uplink bandwidth of LTE/LTE-A system as subband; Otherwise using described GSM bandwidth as subband, a part embeds in the up link of LTE/LTE-A system, and another part then embeds in LTE/LTE-A system downlink bandwidth or is placed on outside LTE/LTE-A system bandwidth;
When judging whether GSM bandwidth is less than described LTE/LTE-A system up-link bandwidth, described LTE/LTE-A system up-link bandwidth is remaining uplink bandwidth after the static pilot tone of deduction and static physical channel.
System described in 12. any one of according to Claim 8 to 11, it is characterized in that, this system comprises LTE/LTE-A system wireless Resource Control Layer, LTE/LTE-A system media access control layer further; GSM bandwidth embedded after LTE/LTE-A system bandwidth as subband, described LTE/LTE-A system wireless Resource Control Layer, LTE/LTE-A system media access control layer are respectively used to:
Described LTE/LTE-A system wireless Resource Control Layer, when for semi-static pilot tone and semi-static physical channel Resources allocation, avoids the GSM frequency band embedded; Described LTE/LTE-A system media access control layer, when for dynamic pilot and dynamic physical dispatch channel resource, avoids the GSM frequency band that using of this community embedded.
System described in 13. any one of according to Claim 8 to 11, is characterized in that, when CDMA signal is directly superimposed upon on GSM and LTE/LTE-A frequency band by described Power Constraint element, specifically for:
Select CDMA Signal averaging frequency domain position, and the reception PSD of LTE/LTE-A, GSM and CDMA signal at control CDMA Signal averaging place;
When selecting CDMA signal and GSM and LTE/LTE-A frequency band superposed positions, CDMA forward link signal is not overlapped with reverse link signal.
14. systems according to claim 13, is characterized in that, described received power spectrum density meets:
PSDRxC-PSDRxL–Noise>＝SINRC+InterferenceMargin；
Wherein, InterferenceMargin is Cell Interference Margin;
That is: PSDRxL<=PSDRxC – Noise – SINRC-InterferenceMargin;
Wherein, PSDRxL is the reception PSD that LTE/LTE-A receives that PSD, PSDRxC are cdma system, and SINRC is the input SINR thresholding of cdma system, and Noise is white Gaussian noise PSD.
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| CN201110103985.7A CN102761877B (en) | 2011-04-25 | 2011-04-25 | Many nets common mode method and system |
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| 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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| WO2008147273A1 (en) * | 2007-06-01 | 2008-12-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Timesharing between different cellular telephony systems |
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| 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 |
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| 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 |
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