Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
In the following description, for the purpose of explaining, a plurality of specific details have been described, to provide to thorough of the present invention.Yet, obviously, do not having under the situation of these specific detail, also can realize the present invention, in addition, under the situation of not conflicting, promptly under the situation that does not deviate from the spirit and scope that claims illustrate, each details among following embodiment and the embodiment can be carried out various combinations.
First embodiment
Fig. 1 is the flow chart according to the data cache method that is used for the data traffic management of first embodiment of the invention.As shown in Figure 1, descending UE DRS (Dedicated Reference Signal) mapping method may further comprise the steps in the LTE system:
Step S102 detects the channel circumstance parameter;
Step S104 compares channel circumstance parameter and the parameter that sets in advance;
Step S106, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system.
Descending UE DRS (Dedicated Reference Signal) mapping method is by detecting channel circumstance in the LTE system according to first embodiment of the invention, and according to testing result select with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system, thereby can be when channel circumstance be better, the two-way reference signal is mapped on the Physical Resource Block of long evolving system, reaches the technique effect that reduces system resource overhead.
Preferably, the channel circumstance parameter is a signal to noise ratio, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise: if the order of detected channel greater than the order that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system; If the order of detected channel less than the order that sets in advance, then is mapped to one tunnel reference signal respectively on the Physical Resource Block of long evolving system.It is consistent with 3GPP LTE communication protocol one tunnel reference signal to be mapped on the Physical Resource Block of LTE system employed method respectively, and can be set to 0 by individual layer/double-deck Status Flag this moment, and UE adopts the individual layer wave beam forming with notice.If adopt the two-way reference signal is mapped on the Physical Resource Block of long evolving system, then individual layer/double-deck Status Flag is set to 1, and UE adopts double-deck wave beam forming with notice.
Preferably, the channel circumstance parameter is a signal to noise ratio, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise: if detected signal to noise ratio greater than the signal to noise ratio that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system; If detected signal to noise ratio less than the signal to noise ratio that sets in advance, then is mapped to the two-way reference signal respectively on two Physical Resource Block of long evolving system.It is consistent with 3GPP LTE communication protocol one tunnel reference signal to be mapped on the Physical Resource Block of LTE system employed method respectively, and can be set to 0 by individual layer/double-deck Status Flag this moment, and UE adopts the individual layer wave beam forming with notice.If adopt the two-way reference signal is mapped on the Physical Resource Block of long evolving system, then individual layer/double-deck Status Flag is set to 1, and UE adopts double-deck wave beam forming with notice.
Preferably, the channel circumstance parameter is the error rate, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise: if the detected error rate greater than the error rate that sets in advance, then is mapped to one tunnel reference signal respectively on the Physical Resource Block of long evolving system; If the detected error rate less than the error rate that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system.It is consistent with 3GPP LTE communication protocol one tunnel reference signal to be mapped on the Physical Resource Block of LTE system employed method respectively, and can be set to 0 by individual layer/double-deck Status Flag this moment, and UE adopts the individual layer wave beam forming with notice.If adopt the two-way reference signal is mapped on the Physical Resource Block of long evolving system, then individual layer/double-deck Status Flag is set to 1, and UE adopts double-deck wave beam forming with notice.
Preferably, Physical Resource Block comprises 12 subcarriers on frequency domain, every road reference signal includes a plurality of reference signals, the two-way reference signal is mapped on the Physical Resource Block of long evolving system and specifically comprises: the two-way reference signal is mapped on N the orthogonal frequency division multiplex OFDM symbol of Physical Resource Block, wherein, the value of N is one of following: 3,4; Each road reference signal is mapped on M the subcarrier on the OFDM symbol, and wherein, the value of M is one of following: 3,4,6.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 2, long evolving system adopts normal cyclic prefix, Physical Resource Block comprises 14 OFDM symbols in time domain, the two-way reference signal is mapped on 4 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 3 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following time-frequency position: the 0th subcarrier of the 3rd OFDM symbol, the 4th subcarrier, the 8th subcarrier; The 0th subcarrier of the 9th OFDM symbol, the 4th subcarrier, the 8th subcarrier; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 2nd subcarrier of the 6th OFDM symbol, the 6th subcarrier, the 10th subcarrier; The 2nd subcarrier of the 12nd OFDM symbol, the 6th subcarrier, the 10th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 3, long evolving system adopts normal cyclic prefix, Physical Resource Block comprises 14 OFDM symbols in time domain, the two-way reference signal is mapped on 4 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 6 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following time-frequency position: the 0th subcarrier of the 3rd OFDM symbol, the 8th subcarrier; The 2nd subcarrier of the 6th OFDM symbol, the 10th subcarrier; The 4th subcarrier of the 9th OFDM symbol; The 6th subcarrier of the 12nd OFDM symbol; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 4th subcarrier of the 3rd OFDM symbol; The 6th subcarrier of the 6th OFDM symbol; The 0th subcarrier of the 9th OFDM symbol, the 8th subcarrier; The 2nd subcarrier of the 12nd OFDM symbol, the 10th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 4, long evolving system adopts extended cyclic prefix, Physical Resource Block comprises 12 OFDM symbols in time domain, the two-way reference signal is mapped on 3 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 4 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following frequent position: the 0th subcarrier of the 4th OFDM symbol, the 6th subcarrier; The 2nd subcarrier of the 7th OFDM symbol, the 8th subcarrier; The 0th subcarrier of the 10th OFDM symbol, the 6th subcarrier; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 3rd subcarrier of the 4th OFDM symbol, the 9th subcarrier; The 5th subcarrier of the 7th OFDM symbol, the 11st subcarrier; The 3rd subcarrier of the 10th OFDM symbol, the 9th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPPLTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 5, long evolving system adopts extended cyclic prefix, Physical Resource Block comprises 12 OFDM symbols in time domain, the two-way reference signal is mapped on 3 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 6 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following frequent position: the 0th subcarrier of the 4th OFDM symbol, the 6th subcarrier; The 2nd subcarrier of the 7th OFDM symbol, the 8th subcarrier; The 3rd subcarrier of the 10th OFDM symbol, the 9th subcarrier; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 3rd subcarrier of the 4th OFDM symbol, the 9th subcarrier; The 5th subcarrier of the 7th OFDM symbol, the 11st subcarrier; The 0th subcarrier of the 10th OFDM symbol, the 6th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPPLTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
In the above-described embodiments, the two-way reference signal is different pseudo noise code.
Downstream station DRS (Dedicated Reference Signal) mapping method can be when channel circumstance be better in the LTE system of present embodiment, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Fig. 6 is the block diagram according to downstream station DRS (Dedicated Reference Signal) mapping device in the LTE system of second embodiment of the invention.As shown in Figure 6, comprise according to downstream station DRS (Dedicated Reference Signal) mapping device in the LTE system of second embodiment of the invention: detection module 602 is used to detect the channel circumstance parameter; Comparison module 604 is used for channel circumstance parameter and the parameter that sets in advance are compared; Mapping block 606, be used for according to comparative result with one the road or the two-way reference signal be mapped to a Physical Resource Block of long evolving system.
Descending UE DRS (Dedicated Reference Signal) mapping method detects channel circumstance by utilizing detection module in the LTE system according to second embodiment of the invention, and utilize mapping block according to comparative result select with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system, thereby can be when channel circumstance be better, the two-way reference signal is mapped on the Physical Resource Block of long evolving system, reaches the technique effect that reduces system resource overhead.
Preferably, the channel circumstance parameter is the signal to noise ratio or the error rate.
Downstream station DRS (Dedicated Reference Signal) mapping device can be when channel circumstance be better in the LTE system of present embodiment, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
As mentioned above, by means of above-mentioned at least one technical scheme of the present invention, can when channel circumstance is better, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements be mapped in the Resource Block, thereby reach the technique effect that reduces system resource overhead.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.