CN102291737B - Method and equipment for determining main transmission point - Google Patents
Method and equipment for determining main transmission point Download PDFInfo
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- CN102291737B CN102291737B CN201110227200.7A CN201110227200A CN102291737B CN 102291737 B CN102291737 B CN 102291737B CN 201110227200 A CN201110227200 A CN 201110227200A CN 102291737 B CN102291737 B CN 102291737B
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Abstract
The embodiment of the invention discloses a method and equipment for determining a main transmission point. The method comprises the following steps of: configuring a transmission subset for user equipment by network side equipment; and transmitting configuration information of the transmission subset to the user equipment by the network side equipment, and indicating the user equipment to select a transmission point in the transmission subset as the main transmission point. In the embodiment of the invention, the transmission subset is configured in a measurement set by the network side equipment to ensure that the user equipment (UE) selects the main transmission point in the transmission subset configured by the network side equipment, and feeds a mark of the main transmission point back to the network side equipment, so the selection of the transmission point can be realized by the UE, the differentiated feedback of channel state information of different transmission points is realized, and the transmission point which transmits data to the UE is reasonably determined.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a device for determining a master transmission point.
Background
CoMP (Coordinated Multiple Point Transmission) technology is cooperation between a plurality of Transmission points separated geographically. Generally, the plurality of transmission points are base stations of different cells or a plurality of transmission devices separated within the same cell. CoMP techniques are mainly classified into two categories: CS/CB (joint scheduling/beamforming) and JP (joint processing).
The CS/CB allocates mutually orthogonal resources for different UE (User Equipment) through coordination of time, frequency and space resources among cells so as to avoid mutual interference; since inter-cell interference is a major factor that restricts the performance of cell-edge UEs, the CS/CB can improve the performance of cell-edge UEs by reducing inter-cell interference. As shown in the schematic diagram of CS/CB in fig. 1, three UEs that may interfere with each other are scheduled on mutually orthogonal resources (i.e. different resources, where the resources include time, frequency, space, and the like) by jointly scheduling 3 cells, so as to effectively avoid interference between cells.
The JP scheme is different from the CS/CB scheme in that data can be simultaneously transmitted to the UE by a plurality of cells to enhance a reception signal of the UE. As shown in the schematic diagram of JP shown in fig. 2, three cells transmit data to one UE on the same resource, the UE receives signals of multiple cells at the same time, and if all cooperating cells transmit the same data to the UE, the useful signals from the multiple cells are superimposed, that is, the quality of the signals received by the UE can be improved, so as to improve the demodulation performance of the UE, especially the performance of the UE at the edge of the cell.
In the prior art, a special form of the JP scheme is the selection of dynamic transmission points: that is, transmission points for transmitting data to the UE are dynamically selected according to channel conditions between the UE and the transmission points, and only 1 transmission point transmits data to the UE at a time. As shown in fig. 3A and fig. 3B, the dynamic transmission point selection scheme is that, in fig. 3A, a selected transmission point 1 is a transmission point for transmitting data to a UE, and in fig. 3B, a selected transmission point 2 is a transmission point for transmitting data to a UE.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
there is no suitable way to select a transmission point for transmitting data to the UE in the prior art.
Disclosure of Invention
The embodiment of the invention provides a method and equipment for determining a main transmission point, which are used for reasonably determining the transmission point for sending data to UE.
In order to achieve the above object, an embodiment of the present invention provides a method for determining a master transmission point, including:
the network side equipment configures a transmission subset for the user equipment;
and the network side equipment sends the configuration information of the transmission subset to the user equipment, and indicates the user equipment to select a transmission point in the transmission subset as a main transmission point.
The embodiment of the invention provides a method for determining a main transmission point, which comprises the following steps:
the user equipment receives configuration information of a transmission subset from network side equipment;
the user equipment selects a transmission point within the transmission subset as a primary transmission point.
An embodiment of the present invention provides a network side device, including:
a configuration module for configuring a transmission subset for a user equipment;
a sending module, configured to send the configuration information of the transmission subset to the user equipment, and instruct the user equipment to select a transmission point in the transmission subset as a primary transmission point.
An embodiment of the present invention provides a user equipment, including:
a receiving module, configured to receive configuration information of a transmission subset from a network side device;
a selection module for selecting a transmission point within the transmission subset as a primary transmission point.
Compared with the prior art, the embodiment of the invention at least has the following advantages: in the embodiment of the invention, the network side equipment configures a transmission subset in the measurement set, so that the UE selects the main transmission point in the transmission subset configured by the network side equipment, and the identification of the main transmission point is fed back to the network side equipment, thereby realizing the selection of the UE on the transmission point, further realizing the differential feedback on the channel state information of different transmission points, and reasonably and certainly sending the transmission point of data to the UE.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of a CS/CB in the prior art;
FIG. 2 is a schematic illustration of JP in the prior art;
FIGS. 3A and 3B are schematic diagrams illustrating the selection of dynamic transmission points in the prior art;
fig. 4 is a flowchart illustrating a method for determining a primary transmission point according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for determining a master transmission point according to a second embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for determining a master transmission point according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a network-side device according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of a user equipment according to a fifth embodiment of the present invention.
Detailed Description
The inventor notices in the process of implementing the invention that: in order to support various CoMP transmission schemes, the network side device needs to obtain channel state information from the transmission point to the UE, and the channel state information may be obtained through channel state information reported by the UE.
When the UE reports the channel state information, one reporting method is: the information reported by the UE may support various transmission schemes (such as CS/CB, JP, and dynamic transmission point selection), i.e. the feedback of the UE is generic. In this reporting mode, after the UE reports the channel state information, the network side device may select a suitable transmission scheme according to the deployment scenario, the service condition, and other factors, where the specifically selected transmission scheme is transparent to the UE, and the implementation flexibility is high.
In practical implementation, the general feedback may be implemented in a hierarchical feedback manner, that is, feeding back channel state information of a single point to each transmission point in a measurement set (the measurement set is a transmission point set configured for the UE by the network side device, and the UE needs to observe and implement feedback of channel state information of the transmission points in the measurement set), and then feeding back phase information and/or amplitude information between the transmission points respectively. Then, the network side device synthesizes channel state information from the transmission point to the UE in the measurement set based on the two parts of information.
Taking the example that the measurement set includes two transmission points, the channels from the two transmission points to the UE are respectively marked as H1And H2The UE selects precoding matrices w for two transmission points respectively1And w2(the precoding matrix is the channel state information), the phase and amplitude information g between two cells can be selected as follows:
wherein g belongs to a predefined codebook set; if w is1And w2If the number of columns is marked as M, g is a diagonal matrix of M × M, and if M =1, g is degenerated into a scalar; if g is a scalar, its codebook set a may be a point in a 16QAM (Quadrature Amplitude Modulation) constellation or a point in a QPSK (Quadrature Phase Shift Keying) constellation.
In the above scheme, the UE treats all transmission points equally when feeding back. In practice, the roles of these transmission points are not the same; in the CS/CB and dynamic transmission point selection schemes, only 1 point will send data to the UE, and the accuracy requirement of the channel information of this transmission point will be higher than that of the other transmission points.
Therefore, if the reported information of the UE is allowed to include information of a UE master transmission point (master transmission point: a transmission point recommended by the UE for data transmission to the UE), the channel state information of each transmission point reported by the UE can be optimally designed according to the recommended condition of the UE. For example, the UE recommends a primary transmission point with relatively high accuracy, while other transmission points report with relatively low accuracy, or report in a differential fashion with respect to the recommended transmission point.
Based on the above discovery, embodiments of the present invention provide a method and an apparatus for determining a main transmission point, which can implement recommendation of a UE to the main transmission point.
In the prior art, a method for determining a master transmission point includes: the network side equipment designates a main transmission point and the UE selects a transmission point in the measurement set. In the method for the network side device to designate the main transmission point, the main transmission point cannot be dynamically adjusted according to the channel condition, and the flexibility is poor. In the method for selecting the main transmission point by the UE in the measurement set, the transmission points in the measurement set may not necessarily all transmit data to the UE, for example, a data packet of the UE may only be shared to a part of the transmission points through a wired connection, and other transmission points control interference to the UE through CS/CB.
In view of the above problems, in the method and the device for determining a main transmission point provided in the embodiments of the present invention, the network side device configures a transmission subset in the measurement set, so that the UE selects the main transmission point in the transmission subset configured by the network side device, and feeds back an identifier of the main transmission point to the network side device, thereby enabling the UE to select the transmission point, further implementing differential feedback on channel state information of different transmission points, and reasonably determining the transmission point at which data is sent to the UE.
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
An embodiment of the present invention provides a method for determining a master transmission point, which is described with reference to processing of a network side device as an example. The device implementing the embodiment of the present invention on the network side (e.g., a base station device) may be a device controlling multiple transmission points, or may be one of multiple transmission points, which is not described again in the embodiments of the present invention.
As shown in fig. 4, the method for determining the master transmission point includes the following steps:
In the embodiment of the present invention, the configuration information of the transmission subset includes identification information of a transmission point and pilot configuration information of the transmission point; alternatively, only the pilot configuration information of the transmission point is included in the configuration information of the transmission subset.
In this embodiment of the present invention, the configuration information of the transmission subset may be a set of transmission points that send data to the UE (i.e., a set of transmission points that may send data to the UE); the configuration information of the measurement set comprises identification information of a plurality of transmission points and pilot frequency configuration information of the plurality of transmission points; or, the configuration information of the measurement set only includes pilot frequency configuration information of a plurality of transmission points; wherein the transmission subset is a subset of the measurement set.
In this embodiment of the present invention, the pilot configuration information includes, but is not limited to, one or any combination of the following: periodicity, offset and resource location, sequence, number of antenna ports information, transmission power information, etc. of CSI-RS (channel state information reference signal).
The following is illustrated with reference to the application scenario shown in fig. 3A or fig. 3B: when configuring a measurement set for a UE, the measurement set needs to include identification information of transmission point 1, identification information of transmission point 2, and identification information of transmission point 3, and pilot configuration information of transmission point 1, transmission point 2, and transmission point 3.
When configuring the transmission subset for the UE, the configuration may be based on different policies. For example, when considering the load sharing policy, if the load of transmission point 3 is large and the loads of transmission point 1 and transmission point 2 are small, transmission point 1 and transmission point 2 may be configured as a transmission subset; for another example, when considering a policy of a network structure for sharing data, if the transmission point 1 cannot transmit data to the UE and the transmission points 2 and 3 can transmit data to the UE, the transmission points 2 and 3 may be configured as a transmission subset.
It should be noted that, in the embodiment of the present invention, the policy for configuring the transmission subset is not limited to the above-mentioned policy for configuring the transmission subset, and all policies for configuring the transmission subset for the UE based on the policy of the network side device are within the protection scope of the embodiment of the present invention.
Step 402, the network side device sends the configuration information of the transmission subset to the UE, and sends the configuration information of the measurement set to the UE, where the configuration information of the transmission subset is used to instruct the UE to select a transmission point as a main transmission point in the transmission subset.
In the embodiment of the present invention, the network side device may send the configuration information of the transmission subset and the configuration information of the measurement set to the UE together through the same message, or may send the configuration information of the transmission subset and the configuration information of the measurement set to the UE through different messages, respectively.
When the configuration information of the transmission subset and the configuration information of the measurement set are sent to the UE together through the same message, the following manner may be implemented in the process that the network side device configures the transmission subset for the UE.
The first method is as follows: when the transmission point in the measurement set belongs to the transmission subset, the network side device sets a first identifier for the transmission point in the configuration information of the measurement set, wherein the first identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset.
The second method comprises the following steps: when the transmission point in the measurement set belongs to the transmission subset, the network side device sets a second identifier for the transmission point in the configuration information of the measurement set, wherein the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; when the transmission point in the measurement set does not belong to the transmission subset, the network side device sets a third identifier for the transmission point in the configuration information of the measurement set, wherein the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
It should be noted that, in the embodiment of the present invention, the network side device may also configure the maximum number of transmission points that can be selected as the main transmission point for the UE; and then the network side equipment sends the maximum number to the UE and indicates the UE to select the maximum number of transmission points as the main transmission points at most in the transmission subset.
In a specific implementation, the maximum number may be sent to the UE by sending the message of the configuration information of the transmission subset together, may be sent to the UE by sending the message of the configuration information of the measurement set together, or may be sent to the UE by a separate message, which is not described herein again.
In addition, the network side device may also receive information reported from the UE, where the information includes indication information of the primary transmission point.
In summary, in the embodiment of the present invention, the network side device configures one transmission subset in the measurement set, so that the UE selects the main transmission point in the transmission subset configured by the network side device, thereby implementing selection of the transmission point by the UE, further implementing differential feedback on channel state information of different transmission points, and reasonably and exactly sending the transmission point of data to the UE.
Example two
A second embodiment of the present invention provides a method for determining a primary transmission point, which is described with reference to processing on a UE side as an example. As shown in fig. 5, the method for determining the master transmission point includes the following steps:
in step 501, the UE receives configuration information of a transmission subset from a network side device, and receives configuration information of a measurement set from the network side device, where the configuration information of the transmission subset is used to instruct the UE to select a transmission point within the transmission subset as a primary transmission point.
In the embodiment of the present invention, the configuration information of the transmission subset includes identification information of a transmission point and pilot configuration information of the transmission point; alternatively, only the pilot configuration information of the transmission point is included in the configuration information of the transmission subset.
In the embodiment of the present invention, the configuration information of the transmission subset is a transmission point set capable of sending data to the UE (i.e. a transmission point set capable of sending data to the UE); the configuration information of the measurement set comprises identification information of a plurality of transmission points and pilot configuration information of the plurality of transmission points, or the configuration information of the measurement set comprises the pilot configuration information of the plurality of transmission points; wherein the transmission subset is a subset of the measurement set. The pilot configuration information includes, but is not limited to, one or any combination of the following: the period, offset and resource position of the CSI-RS, sequence, antenna port number information, transmission power information and the like.
In the embodiment of the present invention, the UE may receive the configuration information of the transmission subset and the configuration information of the measurement set from the network side device through the same message, or may receive the configuration information of the transmission subset and the configuration information of the measurement set from the network side device through different messages.
When the UE receives configuration information of a transmission subset and configuration information of a measurement set from network side equipment through the same message, when a transmission point in the measurement set belongs to the transmission subset, the transmission point in the configuration information of the measurement set corresponds to a first identifier, and the first identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; or, when the transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a second identifier in the configuration information of the measurement set, and the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; when the transmission point in the measurement set does not belong to the transmission subset, the transmission point corresponds to a third identifier in the configuration information of the measurement set, and the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
Step 502, the UE selects a transmission point within the transmission subset as a primary transmission point.
In this step, the UE may obtain channel state information from a plurality of transmission points in the measurement set to the UE, and select one or more transmission points in the transmission subset as a primary transmission point of the UE according to the obtained channel state information.
It should be noted that, in the embodiment of the present invention, the network side device may also configure the maximum number of transmission points that can be selected as the main transmission point for the UE; therefore, in the process that the UE selects the transmission point as the primary transmission point in the transmission subset, the UE may receive the maximum number of transmission points that can be selected as the primary transmission point from the network side device, and may select the maximum number of transmission points as the primary transmission point at most in the transmission subset.
In addition, the maximum number of transmission points that can be selected as the master transmission point may be agreed in advance, and thus, the UE may select the maximum number of transmission points within the transmission subset as the master transmission point at most by the maximum number of transmission points that can be selected as the master transmission point agreed in advance.
Step 503, the UE feeds back the identifier of the primary transmission point to the network side device. Wherein the identity of the primary transmission point may be an index of the selected transmission point within the transmission subset; alternatively, the identity of the primary transmission point may also be represented by means of a bitmap.
It should be noted that, in the embodiment of the present invention, after receiving the transmission subset and the measurement set, the UE may further obtain channel state information from a plurality of transmission points in the measurement set to the UE; feeding back channel state information of transmission points in the transmission subset to the network side equipment by using the time-frequency granularity and the space granularity which are smaller than a preset first threshold; and feeding back the channel state information of other transmission points except the transmission subset in the measurement set to the network side equipment by using the time-frequency granularity and the space granularity which are greater than the preset second threshold. The preset second threshold and the preset first threshold can be selected according to actual experience values, and the preset second threshold is larger than the preset first threshold.
In summary, in the embodiment of the present invention, the network side device configures a transmission subset in the measurement set, so that the UE selects a main transmission point in the transmission subset configured by the network side device, and feeds back an identifier of the main transmission point to the network side device, thereby implementing selection of the transmission point by the UE, implementing differentiated feedback on channel state information of different transmission points, and reasonably and exactly sending the transmission point of data to the UE.
EXAMPLE III
A third embodiment of the present invention provides a method for determining a primary transmission point, which is described with reference to processing performed by a network side device and a UE side as an example. As shown in fig. 6, a method for determining a master transmission point in a network (e.g., a base station) according to an embodiment of the present invention may be a device that controls multiple transmission points, or may be one of the multiple transmission points, where the method includes the following steps:
In step 602, the network side device configures a transmission subset for the UE, where the transmission subset is a subset of the measurement set and is a set of transmission points that are possible to send data to the UE. The configuration information of the transmission subset includes identification information of the transmission point and pilot configuration information of the transmission point.
In the embodiment of the present invention, the configuration of the transmission subset may be implemented in a bitmap manner, that is, 1 bit is used to indicate whether one transmission point in the measurement set belongs to the transmission subset.
In practical applications, the transmission subset may be flexibly configured according to the implementation of the network side device, for example, when the network side device only supports CS/CB, the transmission subset may only include 1 transmission point, and at this time, the UE is not allowed to make a recommendation for the transmission point.
In the embodiment of the invention, because the transmission points outside the transmission subset in the measurement set can not actually transmit data to the UE, the feedback can be carried out by using larger time-frequency granularity and space granularity; therefore, the UE may feed back, to the network side device, the channel state information of the transmission points in the transmission subset by using the time-frequency granularity and the spatial granularity smaller than the preset first threshold; and feeding back the channel state information of other transmission points except the transmission subset in the measurement set to the network side equipment according to the time-frequency granularity and the space granularity which are greater than the preset second threshold. The preset second threshold and the preset first threshold can be selected according to actual experience values, and the preset second threshold is larger than the preset first threshold.
In the embodiment of the present invention, the identifier of the master transmission point may be an index of the selected transmission point in the transmission subset; the primary transmission point identifier may also be fed back in a bitmap manner, i.e. 1 bit is used to indicate whether the transmission point in the transmission subset is selected as the primary transmission point by the UE.
In addition, in the embodiment of the present invention, the network side device may further configure the maximum number of transmission points that the UE can select, and if the base station configures that the UE can select at most 1 transmission point, the UE only needs to feed back the index of 1 main transmission point.
It should be noted that the maximum number of transmission points may also be predetermined, and if it is predetermined that the UE can select at most 1 transmission point, the UE only needs to feed back the index of 1 main transmission point.
In summary, in the embodiment of the present invention, the network side device configures a transmission subset in the measurement set, so that the UE selects a main transmission point in the transmission subset configured by the network side device, and feeds back an identifier of the main transmission point to the network side device, thereby implementing selection of the transmission point by the UE, implementing differentiated feedback on channel state information of different transmission points, and reasonably and exactly sending the transmission point of data to the UE.
Example four
Based on the same inventive concept as the above method, an embodiment of the present invention further provides a network-side device, as shown in fig. 4, where the network-side device includes:
a configuration module 11, configured to configure a transmission subset for a user equipment;
a sending module 12, configured to send configuration information of the transmission subset to the user equipment, and instruct the user equipment to select a transmission point in the transmission subset as a primary transmission point.
The configuration information of the transmission subset comprises identification information of a transmission point and pilot frequency configuration information of the transmission point; or, the configuration information of the transmission subset includes pilot configuration information of the transmission point.
The configuration module 11 is further configured to configure a measurement set for the ue;
the sending module 12 is further configured to send configuration information of the measurement set to the user equipment; the configuration information of the measurement set comprises identification information of a plurality of transmission points and pilot frequency configuration information of the plurality of transmission points; or, the configuration information of the measurement set includes pilot configuration information of a plurality of transmission points; wherein the transmission subset is a subset of the measurement set.
The configuration module 11 is specifically configured to set a first identifier for a transmission point in the measurement set in the configuration information of the measurement set when the transmission point in the measurement set belongs to the transmission subset, where the first identifier is used to indicate that the transmission point in the measurement set belongs to the transmission subset; or,
when a transmission point in the measurement set belongs to the transmission subset, setting a second identifier for the transmission point in the configuration information of the measurement set, wherein the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; and when the transmission point in the measurement set does not belong to the transmission subset, setting a third identifier for the transmission point in the configuration information of the measurement set, wherein the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
The configuration module 11 is further configured to configure the maximum number of the transmission points that can be selected as a master transmission point for the user equipment;
the sending module 12 is further configured to send the maximum number to the ue, and instruct the ue to select the maximum number of transmission points as a primary transmission point at most in the transmission subset.
The network side device further includes: a receiving module 13, configured to receive information reported by the ue, where the information includes indication information of a primary transmission point.
The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module, and can also be further split into a plurality of sub-modules.
EXAMPLE five
Based on the same inventive concept as the above method, an embodiment of the present invention further provides a user equipment, as shown in fig. 5, where the user equipment includes:
a receiving module 21, configured to receive configuration information of a transmission subset from a network side device;
a selection module 22 configured to select a transmission point within the transmission subset as a primary transmission point.
The configuration information of the transmission subset comprises identification information of a transmission point and pilot frequency configuration information of the transmission point; or, the configuration information of the transmission subset includes pilot configuration information of the transmission point.
The receiving module 21 is further configured to receive configuration information of a measurement set from the network side device, where the configuration information of the measurement set includes identification information of multiple transmission points and pilot configuration information of the multiple transmission points; or, the configuration information of the measurement set includes pilot configuration information of a plurality of transmission points; wherein the transmission subset is a subset of the measurement set.
In the embodiment of the present invention, when a transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a first identifier in the configuration information of the measurement set, and the first identifier is used to indicate that the transmission point in the measurement set belongs to the transmission subset; or,
when a transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a second identifier in the configuration information of the measurement set, and the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; when the transmission point in the measurement set does not belong to the transmission subset, the transmission point corresponds to a third identifier in the configuration information of the measurement set, and the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
Further comprising: a sending module 23, configured to obtain channel state information from the multiple transmission points in the measurement set to the user equipment;
feeding back channel state information of transmission points in the transmission subset to the network side equipment by using the time-frequency granularity and the space granularity which are smaller than a preset first threshold;
feeding back channel state information of other transmission points except the transmission subset in the measurement set to the network side equipment by using the time-frequency granularity and the space granularity which are greater than a preset second threshold;
the preset second threshold is greater than the preset first threshold.
The selecting module 22 is specifically configured to obtain channel state information from the multiple transmission points in the measurement set to the user equipment;
and selecting one or more transmission points within the transmission subset as primary transmission points according to the obtained channel state information.
A sending module 23, configured to feed back the identifier of the main transmission point to the network side device;
the identity of the primary transmission point is an index of the selected transmission point within the transmission subset; or, the identity of the primary transmission point is represented by a bitmap.
The receiving module 21 is further configured to receive the maximum number of transmission points that can be selected as a master transmission point from the network side device;
the selection module is specifically configured to select the maximum number of transmission points in the transmission subset at most as a primary transmission point; or,
the maximum number of transmission points can be selected as the main transmission point in the transmission subset by the predetermined maximum number of transmission points.
The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module, and can also be further split into a plurality of sub-modules.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (28)
1. A method for determining a master transmission point, comprising:
the network side equipment configures a transmission subset for the user equipment;
and the network side equipment sends the configuration information of the transmission subset to the user equipment, and indicates the user equipment to select a transmission point in the transmission subset as a main transmission point.
2. The method of claim 1, wherein the configuration information of the transmission subset includes identification information of a transmission point and pilot configuration information of the transmission point; or, the configuration information of the transmission subset includes pilot configuration information of the transmission point.
3. The method of claim 1, wherein the method further comprises:
the network side equipment configures a measurement set for the user equipment and sends configuration information of the measurement set to the user equipment;
the configuration information of the measurement set comprises identification information of a plurality of transmission points and pilot frequency configuration information of the plurality of transmission points; or, the configuration information of the measurement set includes pilot configuration information of a plurality of transmission points;
wherein the transmission subset is a subset of the measurement set.
4. The method of claim 3, wherein the method further comprises:
when a transmission point in the measurement set belongs to the transmission subset, the network side device sets a first identifier for the transmission point in the configuration information of the measurement set, wherein the first identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; or,
when the transmission point in the measurement set belongs to the transmission subset, the network side device sets a second identifier for the transmission point in the configuration information of the measurement set, wherein the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; when the transmission point in the measurement set does not belong to the transmission subset, the network side device sets a third identifier for the transmission point in the configuration information of the measurement set, where the third identifier is used to indicate that the transmission point in the measurement set does not belong to the transmission subset.
5. The method of claim 1, wherein the method further comprises:
the network side equipment configures the maximum number of the selectable main transmission points for the user equipment;
and the network side equipment sends the maximum number to the user equipment, and instructs the user equipment to select the maximum number of transmission points as main transmission points at most in the transmission subset.
6. The method of claim 1, wherein the method further comprises:
and the network side equipment receives information reported by the user equipment, wherein the information comprises the indication information of the main transmission point.
7. A method for determining a master transmission point, comprising:
the user equipment receives configuration information of a transmission subset from network side equipment;
the user equipment selects a transmission point within the transmission subset as a primary transmission point.
8. The method of claim 7, wherein the configuration information of the transmission subset includes identification information of a transmission point and pilot configuration information of the transmission point; or, the configuration information of the transmission subset includes pilot configuration information of the transmission point.
9. The method of claim 7, wherein the method further comprises:
the user equipment receives configuration information of a measurement set from the network side equipment, wherein the configuration information of the measurement set comprises identification information of a plurality of transmission points and pilot frequency configuration information of the plurality of transmission points; or, the configuration information of the measurement set includes pilot configuration information of a plurality of transmission points;
wherein the transmission subset is a subset of the measurement set.
10. The method of claim 9,
when a transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a first identifier in the configuration information of the measurement set, and the first identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; or,
when a transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a second identifier in the configuration information of the measurement set, and the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; when the transmission point in the measurement set does not belong to the transmission subset, the transmission point corresponds to a third identifier in the configuration information of the measurement set, and the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
11. The method of claim 9, wherein the method further comprises:
the user equipment obtaining channel state information of the plurality of transmission points in the measurement set to the user equipment;
the user equipment feeds back channel state information of transmission points in the transmission subset to the network side equipment by using time-frequency granularity and space granularity which are smaller than a preset first threshold;
the user equipment feeds back channel state information of other transmission points except the transmission subset in the measurement set to the network side equipment by using the time-frequency granularity and the space granularity which are greater than a preset second threshold;
the preset second threshold is greater than the preset first threshold.
12. The method of claim 9, wherein the user equipment selecting a transmission point within the subset of transmissions as a primary transmission point, comprising:
the user equipment obtaining channel state information of the plurality of transmission points in the measurement set to the user equipment;
and the user equipment selects one or more transmission points in the transmission subset as main transmission points according to the obtained channel state information.
13. The method of claim 7, wherein the user equipment selects a transmission point within the subset of transmissions as a primary transmission point, thereafter further comprising:
the user equipment feeds back the identification of the main transmission point to the network side equipment;
the identity of the primary transmission point is an index of the selected transmission point within the transmission subset; or, the identity of the primary transmission point is represented by a bitmap.
14. The method of claim 7, wherein the user equipment selects a transmission point within the subset of transmissions as a primary transmission point, comprising:
the user equipment receives the maximum number of transmission points which can be selected as the main transmission points from the network side equipment, and selects the maximum number of transmission points as the main transmission points at most in the transmission subset; or,
the user equipment selects the maximum number of transmission points as the main transmission point at most in the transmission subset through the preset maximum number which can be selected as the main transmission point.
15. A network-side device, comprising:
a configuration module for configuring a transmission subset for a user equipment;
a sending module, configured to send the configuration information of the transmission subset to the user equipment, and instruct the user equipment to select a transmission point in the transmission subset as a primary transmission point.
16. The network-side device of claim 15, wherein the configuration information of the transmission subset includes identification information of a transmission point and pilot configuration information of the transmission point; or, the configuration information of the transmission subset includes pilot configuration information of the transmission point.
17. The network-side device of claim 15,
the configuration module is further configured to configure a measurement set for the user equipment;
the sending module is further configured to send configuration information of the measurement set to the user equipment;
the configuration information of the measurement set comprises identification information of a plurality of transmission points and pilot frequency configuration information of the plurality of transmission points; or, the configuration information of the measurement set includes pilot configuration information of a plurality of transmission points;
wherein the transmission subset is a subset of the measurement set.
18. The network-side device of claim 17,
the configuration module is specifically configured to set a first identifier for a transmission point in the measurement set in the configuration information of the measurement set when the transmission point in the measurement set belongs to the transmission subset, where the first identifier is used to indicate that the transmission point in the measurement set belongs to the transmission subset; or,
when a transmission point in the measurement set belongs to the transmission subset, setting a second identifier for the transmission point in the configuration information of the measurement set, wherein the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; and when the transmission point in the measurement set does not belong to the transmission subset, setting a third identifier for the transmission point in the configuration information of the measurement set, wherein the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
19. The network-side device of claim 15,
the configuration module is further configured to configure the maximum number of the selectable main transmission points for the user equipment;
the sending module is further configured to send the maximum number to the user equipment, and instruct the user equipment to select the maximum number of transmission points as a master transmission point at most in the transmission subset.
20. The network-side device of claim 15, further comprising:
and the receiving module is used for receiving the information reported by the user equipment, wherein the information comprises the indication information of the main transmission point.
21. A user device, comprising:
a receiving module, configured to receive configuration information of a transmission subset from a network side device;
a selection module for selecting a transmission point within the transmission subset as a primary transmission point.
22. The user equipment of claim 21, wherein configuration information of the transmission subset includes identification information of transmission points and pilot configuration information of the transmission points; or, the configuration information of the transmission subset includes pilot configuration information of the transmission point.
23. The user equipment of claim 21,
the receiving module is further configured to receive configuration information of a measurement set from the network side device, where the configuration information of the measurement set includes identification information of multiple transmission points and pilot configuration information of the multiple transmission points; or, the configuration information of the measurement set includes pilot configuration information of a plurality of transmission points;
wherein the transmission subset is a subset of the measurement set.
24. The user equipment of claim 23,
when a transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a first identifier in the configuration information of the measurement set, and the first identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; or,
when a transmission point in the measurement set belongs to the transmission subset, the transmission point corresponds to a second identifier in the configuration information of the measurement set, and the second identifier is used for indicating that the transmission point in the measurement set belongs to the transmission subset; when the transmission point in the measurement set does not belong to the transmission subset, the transmission point corresponds to a third identifier in the configuration information of the measurement set, and the third identifier is used for indicating that the transmission point in the measurement set does not belong to the transmission subset.
25. The user equipment of claim 23, further comprising:
a sending module, configured to obtain channel state information from the plurality of transmission points in the measurement set to the user equipment;
feeding back channel state information of transmission points in the transmission subset to the network side equipment by using the time-frequency granularity and the space granularity which are smaller than a preset first threshold;
feeding back channel state information of other transmission points except the transmission subset in the measurement set to the network side equipment by using the time-frequency granularity and the space granularity which are greater than a preset second threshold;
the preset second threshold is greater than the preset first threshold.
26. The user equipment of claim 23,
the selecting module is specifically configured to obtain channel state information from the plurality of transmission points in the measurement set to the user equipment;
and selecting one or more transmission points within the transmission subset as primary transmission points according to the obtained channel state information.
27. The user equipment of claim 21, further comprising:
a sending module, configured to feed back the identifier of the main transmission point to the network side device;
the identity of the primary transmission point is an index of the selected transmission point within the transmission subset; or, the identity of the primary transmission point is represented by a bitmap.
28. The user equipment of claim 21,
the receiving module is further configured to receive the maximum number of transmission points that can be selected as a master transmission point from the network side device;
the selection module is specifically configured to select the maximum number of transmission points in the transmission subset at most as a primary transmission point; or,
the maximum number of transmission points can be selected as the main transmission point in the transmission subset by the predetermined maximum number of transmission points.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110227200.7A CN102291737B (en) | 2011-08-09 | 2011-08-09 | Method and equipment for determining main transmission point |
| PCT/CN2012/079766 WO2013020497A1 (en) | 2011-08-09 | 2012-08-07 | Method and device for determining main transmission point |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110227200.7A CN102291737B (en) | 2011-08-09 | 2011-08-09 | Method and equipment for determining main transmission point |
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| CN102291737B true CN102291737B (en) | 2014-01-29 |
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| WO2013020497A1 (en) | 2013-02-14 |
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