Method, system and device for determining joining CoMP transmission cell and transmission data

[0042] After the base station to which the coordinated cell belongs in the embodiment of the present invention meets the trigger condition, the coordinated transmission parameter is determined according to the coordinated transmission capability of the coordinated cell, and the coordinated transmission parameter is sent to the base station to which the serving cell belongs; the base station to which the serving cell belongs according to the received coordinated transmission Parameter to determine the coordinated cell participating in CoMP transmission from the coordinated cells. Since the base station where the serving cell is located will determine the corresponding coordinated cell based on the current coordinated transmission capability of the coordinated cell, avoiding the situation that the determined coordinated cell that can participate in CoMP transmission cannot perform coordinated transmission due to insufficient capacity, thereby improving the CoMP technology performance.

[0043] Among them, the cell to which the terminal belongs is called the serving cell. When it is necessary to coordinate data transmission to terminals in other cells, the cell is also a coordinated cell.

[0044] There are many ways for each cell to determine which cells it can serve as a cooperative cell:

[0045] For example, when the network is established, the corresponding relationship between the serving cell and the coordinated cell can be preset, that is, which coordinated cells each serving cell corresponds to;

[0046] The serving cell can also determine the coordinated cells that can perform coordinated transmission for itself, and then send information to these cells, and the cell that receives the information will record it, so as to know which cells it can become.

[0047] In the specific implementation process, if the cooperative cell and the serving cell belong to different base stations, the information is transferred through the interfaces between the base stations, such as the X2 interface and the S1 interface;

[0048] If the cooperative cell and the serving cell belong to the same base station, the information is transferred within the base station.

[0049] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings of the specification.

[0050] Such as figure 2 As shown, the system for determining cells participating in CoMP transmission in the embodiment of the present invention includes: a base station 10 to which a coordinated cell belongs and a base station 20 to which a serving cell belongs.

[0051] The base station 10 to which the coordinated cell belongs is configured to determine the coordinated transmission parameter according to the coordinated transmission capability of the coordinated cell after the trigger condition is satisfied, and send the coordinated transmission parameter to the base station to which the serving cell belongs.

[0052] The base station 20 to which the serving cell belongs is configured to determine the coordinated cell participating in CoMP transmission from the coordinated cells according to the received coordinated transmission parameters from the base station 10 to which the coordinated cell belongs.

[0053] Such as image 3 As shown, the first base station in the embodiment of the present invention has a serving cell, and the first base station in the embodiment of the present invention includes: a triggering module 100, a parameter determining module 110, and a parameter sending module 120.

[0054] The trigger module 100 is configured to trigger the parameter determination module to determine the cooperative transmission parameter after the trigger condition is met.

[0055] The parameter determination module 110 is configured to determine the coordinated transmission parameter according to the coordinated transmission capability of the coordinated cell.

[0056] The parameter sending module 120 is configured to send the coordinated transmission parameters determined by the parameter determining module 110 to the base station to which the serving cell belongs, and instruct the base station to which the serving cell belongs to determine the coordinated cell participating in CoMP transmission from the coordinated cells according to the received coordinated transmission parameter.

[0057] Wherein, the trigger module 100 determines that the trigger condition is satisfied when one of the following conditions is met:

[0058] Initial trigger mode: receiving a coordination request message from the base station to which the serving cell belongs, where the coordination request message indicates that the base station to which the coordinated cell belongs participates in CoMP transmission;

[0059] Inquiry trigger mode: receiving a sending parameter request message from the base station to which the serving cell belongs, where the sending parameter request message requests the base station to which the coordinated cell belongs to send coordinated transmission parameters;

[0060] Periodic trigger mode: the set sending period arrives;

[0061] Change trigger mode: the coordinated transmission parameter of the coordinated cell changes.

[0062] It should be noted that the trigger condition is not limited to the above four methods, and any method that can trigger the determination of the coordinated transmission parameter is applicable to the embodiment of the present invention.

[0063] If the trigger condition is receiving a coordination request message from a base station to which the serving cell belongs or receiving a coordination request message from a base station to which the serving cell belongs, the parameter sending module 120 only sends the coordinated transmission parameters to the message sender;

[0064] If the trigger condition is that the set transmission period arrives or the coordinated transmission parameter of the coordinated cell changes, the parameter sending module 120 sends the coordinated transmission parameter to all serving cells corresponding to itself.

[0065] Among them, according to different cooperative transmission capabilities, the parameter determination module 110 determines cooperative transmission parameters in different ways, and several are listed below.

[0066] The coordinated transmission parameters in the mode 1 to the mode 3 are all service priority parameters; the coordinated transmission parameter in the mode 4 is the coordination capability parameter; the value of the coordinated transmission parameter in the mode 5 is the physical resource occupation.

[0067] Method 1: The cooperative transmission parameter is a service priority parameter.

[0068] The parameter determination module 110 determines the service priority of each service transmitted in the coordinated cell, and determines the service priority parameter according to the highest service priority, and uses the service priority parameter as the coordinated transmission parameter.

[0069] Since multiple services are being transmitted in the coordinated cell when the coordinated transmission parameters are determined, the highest service priority among the service priorities of each service is selected at this time. If there is no service being transmitted in the current cooperative cell, it is determined that the highest service priority is 0 (that is, the minimum service priority) or the lowest service priority is taken as the highest service priority of the current service.

[0070] Manner 2: The cooperative transmission parameter is a service priority parameter.

[0071] The parameter determination module 110 determines the service priority of the most frequent service in the coordinated cell, and determines the service priority parameter according to the service priority, and uses the service priority parameter as the coordinated transmission parameter.

[0072] Among them, the most frequent business refers to the business with the largest business volume or the largest number of transmissions initiated in the coordinated cell within a set time.

[0073] The length of the set time can be set according to the needs; it can be determined according to the needs whether to use the traffic volume or the number of transmissions initiated as the most frequent business measurement standard.

[0074] In the specific implementation process, preferably, the parameter determination module 110 can determine the most frequent service according to the length of the set time period; of course, it can also determine the most frequent service when the coordinated transmission parameters need to be determined.

[0075] If there are multiple businesses that are the most frequent businesses, the highest business priority among the business priorities of the most frequent businesses is determined.

[0076] Manner 3: The cooperative transmission parameter is a service priority parameter.

[0077] The parameter determination module 110 determines the service attribute corresponding to the physical resource range to which the physical resource occupancy in the coordinated cell belongs according to the preset correspondence between the physical resource range and the service attribute, and determines the various cooperative transmissions that the coordinated cell can transmit according to the service attribute. The service priority of the service, and the service priority parameter is determined according to the highest service priority, and the service priority parameter is used as the cooperative transmission parameter.

[0078] In a specific implementation process, the corresponding relationship between the physical resource range and service attributes of each coordinated cell may be the same or different.

[0079] Since each business has business attributes, the business attributes of different businesses may be the same or different; in the correspondence between physical resource ranges and business attributes, each physical resource range may correspond to one business attribute, or it may correspond to multiple businesses Attributes. After determining the physical resource occupation in the cooperative cell, the physical resource range to which the physical resource occupation belongs is further determined, and then the physical resource range to which the physical resource occupation belongs can be determined according to the correspondence between the physical resource range and the service attribute Corresponding business attributes (may be one or multiple); correspondingly, according to the determined business attributes, the corresponding business (may be one or multiple) can be determined for the business attribute, so that the cooperative cell can be Coordinated transmission of each business (may be one or multiple).

[0080] With respect to the first to third methods, the service priority parameter is a Label (service identification) parameter or QoS (Quality of Service, quality of service) information.

[0081] Among them, the Label parameter can be seen in Table 1:

[0082] The method of exchanging the Label parameter in QoS parameters has a small amount of information exchanged, but because the scheduling algorithms of each cell are different from each other, the service of the same Label has different service priorities in different cells, which makes it difficult to implement strict service-based services. Priority scheduling, but it can be ensured that there will be no situations in which services with very low priority preempt the resources of services with high priority. For example, Best effort TCP bulk data (Label 8) will not take precedence over Realtime (Label 1).

[0083] The advantage of interacting all QoS parameters is that strict scheduling based on business priority can be realized, but the amount of information exchanged is relatively large.

[0084] The specific interaction method used can be preset or adjusted according to the network conditions.

[0085]

[0086] Table 1 Business identification feature table

[0087] Method 4: The cooperative transmission parameter is a cooperative capability parameter.

[0088] The parameter determination module 110 determines the physical resource occupancy in the cooperative cell, compares the physical resource occupancy with a threshold value, generates a coordination capability parameter according to the comparison result, and uses the coordination capability parameter as a coordination transmission parameter.

[0089] Among them, the coordination capability parameter indicates whether the corresponding coordinated cell can participate in coordinated transmission.

[0090] In the specific implementation process, the coordination capability parameter only needs to occupy 1 bit. For example, "1" indicates that the corresponding coordinated cell can participate in coordinated transmission; "0" indicates that the corresponding coordinated cell cannot participate in coordinated transmission.

[0091] After determining the physical resource occupancy in the coordinated cell, the parameter determining module 110 determines that the coordinated cell can participate in the coordinated transmission if the physical resource occupancy is less than the threshold; otherwise, determines that the coordinated cell cannot participate in the coordinated transmission.

[0092] The threshold value can be set and adjusted as required. For example, the size of the threshold value can be adjusted according to the operating status of the cell. If the operating status is good, the threshold value can be increased; otherwise, the threshold value can be reduced.

[0093] Mode 5: The value of the cooperative transmission parameter is the physical resource occupation.

[0094] The parameter determination module 110 determines the physical resource occupation in the coordinated cell, and uses the physical resource occupation as the value of the coordinated transmission parameter.

[0095] Which of the above five methods is used can be set in the protocol, or it can be negotiated between base stations.

[0096] If the first type of base station in the embodiment of the present invention has a serving cell, the first type of base station in the embodiment of the present invention may further include: a receiving module 130 and a cell determining module 140.

[0097] The receiving module 130 is configured to receive coordinated transmission parameters from the base station to which the coordinated cell belongs.

[0098] Wherein, if the cooperative cell corresponding to the serving cell in the first base station has the cooperative cell in the first base station, the receiving module 130 receives the cooperative transmission parameters through the interface between the base stations, and also receives the parameter sending module through the internal interface. The coordinated transmission parameters sent by 120; the corresponding parameter sending module 120 will also send the coordinated transmission parameters through the interface between the base stations, and will also send the coordinated transmission parameters to the receiving module 130 through the internal interface.

[0099] The cell determining module 140 is configured to determine the coordinated cells participating in CoMP transmission from the coordinated cells according to the coordinated transmission parameters received by the receiving module 130.

[0100] If the coordinated transmission parameter received by the receiving module 130 is a service priority parameter, since it is necessary to compare the received service priority with the service priority of the coordinated data, the cell determining module 140 needs to transmit coordinated data according to The received service priority parameter determines the service priority corresponding to each coordinated cell, and the coordinated cell that can participate in CoMP transmission is selected from the coordinated cells.

[0101] The coordinated data that needs to be transmitted here includes the uplink coordinated data that needs to be received and the downlink coordinated data that needs to be sent. The coordinated data that needs to be transmitted described below has the same meaning as described here, and the explanation will not be repeated.

[0102] If it is the coordinated data that needs to be received, the receiving module 130 performs scheduling according to the buffer status report (BSR) reported by the terminal. The BSR contains the service priority information of the uplink service that the terminal needs to send and the information in each logical channel group. Business volume.

[0103] The service priority corresponding to the coordinated cell selected by the receiving module 130 is not greater than the service priority of the coordinated data to be transmitted.

[0104] If the coordinated transmission parameter received by the receiving module 130 is a coordinated ability parameter, since the coordinated ability parameter indicates whether the corresponding coordinated cell can participate in the coordinated transmission, there is no need to wait for the coordinated data that is needed. The cell determining module 140 can immediately determine each coordinated transmission parameter. The coordination capability parameter corresponding to the cell selects a coordinated cell that can participate in CoMP transmission from the coordinated cell.

[0105] The capability indication parameter corresponding to the coordinated cell selected by the cell determining module 140 indicates that the corresponding coordinated cell can participate in coordinated transmission.

[0106] If the value of the coordinated transmission parameter received by the receiving module 130 is the physical resource occupancy, the cell determining module 140 determines the physical resource occupancy corresponding to the received coordinated cell according to the preset correspondence between the physical resource range and the service attribute According to the business attribute corresponding to the physical resource range of, determine the business priority of each business that can be cooperatively transmitted by the cooperative cell according to the business attribute, and determine the highest business priority corresponding to the cooperative cell from the business priority of each business.

[0107] Since the received service priority needs to be compared with the service priority of the coordinated data, the cell determination module 140 selects coordinated cells that can participate in CoMP transmission from the coordinated cells when there is coordinated data to be transmitted.

[0108] The highest service priority corresponding to the coordinated cell selected by the cell determining module 140 is not greater than the service priority of the coordinated data.

[0109] In a specific implementation process, the cell determination module 140 may also determine the highest service priority when there is coordinated data to be transmitted, and then determine the coordinated cell participating in CoMP transmission from the coordinated cells.

[0110] Regardless of the physical resource occupancy of which coordinated cell, the cell determining module 140 determines the corresponding relationship between the physical resource range and service attribute to determine the corresponding service attribute. Therefore, for the physical resource occupancy, physical resource range and service of different coordinated cells The correspondence of attributes is exactly the same.

[0111] Wherein, the cell determination module 140 sends the downlink coordinated data to the base station to which the coordinated cell that can participate in CoMP transmission belongs when there is downlink coordinated data to be sent.

[0112] Correspondingly, the parameter sending module 120 sends the downlink coordinated data to the corresponding terminal after receiving the downlink coordinated data from the base station to which the serving cell belongs.

[0113] When there is uplink coordinated data that needs to be received, the cell determining module 140 sends uplink scheduling information to the base station where the coordinated cell that can participate in CoMP transmission is located.

[0114] Correspondingly, the parameter sending module 120 receives the uplink scheduling information or, according to the uplink scheduling information, receives the coordinated data from the terminal through the uplink physical resources.

[0115] Further, after receiving the uplink data, the parameter sending module 120 sends the uplink data or the preliminary processing result of the uplink data to the base station to which the serving cell belongs.

[0116] The cell determination module 140 receives the uplink coordinated data or the preliminary processing result of the uplink coordinated data sent by the base station of the coordinated cell, and performs joint processing with the uplink data received by the cell to obtain the final demodulation result

[0117] If there is data transmission on the downlink physical resource (or uplink physical resource) that needs to carry coordinated data, the parameter sending module 120 stops the data transmission on the downlink physical resource (or uplink physical resource), and sends the downlink through the downlink physical resource. Coordinated data (or received uplink coordinated data through the uplink physical resource). That is, after receiving the downlink coordinated data (or uplink scheduling information) from the base station to which the serving cell belongs, the parameter sending module 120 should preferentially send the downlink coordinated data (or receive the uplink coordinated data of the corresponding terminal) to the corresponding terminal. Reschedule and transmit the data of the cell outside the physical resource.

[0118] In order to improve the transmission quality of coordinated data, the cell determination module 140 may further select coordinated cells that meet the transmission conditions from the determined coordinated cells that can participate in CoMP transmission when there is coordinated data that needs to be coordinated transmission. Community.

[0119] Wherein, the cell determining module 140 determines that the transmission condition is satisfied when one or more of the following conditions are met:

[0120] The channel conditions between the selected cooperative cell and the terminal requiring assistance meet the transmission requirements;

[0121] The signal of the selected cooperative cell is synchronized with the signal of the serving cell.

[0122] Such as Figure 4 As shown, the second type of base station in the embodiment of the present invention has a serving cell, and the second type of base station in the embodiment of the present invention includes a receiving module 300 and a cell determining module 310.

[0123] The receiving module 300 is configured to receive coordinated transmission parameters from the base station to which the coordinated cell belongs.

[0124] The coordinated transmission parameters are determined by the base station to which the coordinated cell belongs according to the coordinated transmission capability of the coordinated cell.

[0125] The cell determining module 310 is configured to determine the coordinated cells participating in CoMP transmission from the coordinated cells according to the coordinated transmission parameters received by the receiving module 300.

[0126] The functions of the receiving module 300 and the cell determining module 310 in the second base station in the embodiment of the present invention are the same as the functions of the receiving module 130 and the cell determining module 140 in the first base station in the embodiment of the present invention, and will not be repeated here. .

[0127] Such as Figure 5 As shown, the system for transmitting coordinated data in the embodiment of the present invention includes: a base station 30 to which a serving cell belongs and a base station 40 to which a coordinated cell belongs.

[0128] If you need to send collaborative data:

[0129] The base station 30 to which the serving cell belongs is configured to determine the coordinated cell participating in CoMP transmission from the coordinated cells according to the coordinated transmission parameters, and then send downlink coordinated data to the base station 40 where the coordinated cell capable of participating in CoMP transmission is located.

[0130] The coordinated transmission parameters are determined by the base station 40 to which the coordinated cell belongs according to the coordinated transmission capability of the coordinated cell.

[0131] The base station 40 to which the coordinated cell belongs is used to send received downlink coordinated data to the terminal.

[0132] If you need to receive collaborative data:

[0133] The base station 30 to which the serving cell belongs is configured to determine the coordinated cell participating in CoMP transmission from the coordinated cells according to the coordinated transmission parameters, and then send uplink scheduling information to the base station where the coordinated cell capable of participating in CoMP transmission is located;

[0134] The base station 40 to which the coordinated cell belongs is configured to receive coordinated data from the terminal through uplink physical resources according to uplink scheduling information.

[0135] If there is data transmission in the cell on the physical resource that needs to carry the coordinated data, the base station 40 to which the coordinated cell belongs stops the data transmission on the physical resource, and sends (or receives) the coordinated data through the physical resource. In other words, the base station 40 to which the coordinated cell belongs, after receiving the downlink coordinated data (or uplink scheduling information) from the base station to which the serving cell belongs, should preferentially send the downlink coordinated data to the corresponding terminal (or receive the uplink coordinated data of the corresponding terminal). ), reschedule and transmit the data of the cell outside the physical resource.

[0136] In order to improve the transmission quality of coordinated data, when the base station 30 to which the serving cell belongs has coordinated data that needs to be sent (or received), it may further select coordinated cells that meet the transmission conditions from the determined coordinated cells that can participate in CoMP transmission. A coordinated cell participating in coordinated transmission of coordinated data.

[0137] Wherein, the base station 30 to which the serving cell belongs determines that the transmission condition is satisfied when one or more of the following conditions are met:

[0138] The channel conditions between the selected cooperative cell and the terminal requiring assistance meet the transmission requirements;

[0139] The signal of the selected cooperative cell is synchronized with the signal of the serving cell.

[0140] Such as Image 6 As shown, the method for determining cells participating in CoMP transmission in the embodiment of the present invention includes the following steps:

[0141] Step 601: After satisfying the trigger condition, the base station to which the coordinated cell belongs determines the coordinated transmission parameter according to the coordinated transmission capability of the coordinated cell, and sends the coordinated transmission parameter to the base station to which the serving cell belongs.

[0142] Step 602: The base station to which the serving cell belongs determines a coordinated cell participating in CoMP transmission from the coordinated cell according to the received coordinated transmission parameter from the base station to which the coordinated cell belongs.

[0143] Wherein, the base station to which the coordinated cell belongs in step 601 determines that the trigger condition is satisfied when one of the following conditions is met:

[0144] Initial trigger mode: receiving a coordination request message from the base station to which the serving cell belongs, where the coordination request message indicates that the base station to which the coordinated cell belongs participates in CoMP transmission;

[0145] Inquiry trigger mode: receiving a sending parameter request message from the base station to which the serving cell belongs, where the sending parameter request message requests the base station to which the coordinated cell belongs to send coordinated transmission parameters;

[0146] Periodic trigger mode: the set sending period arrives;

[0147] Change trigger mode: the coordinated transmission parameter of the coordinated cell changes.

[0148] It should be noted that the trigger condition is not limited to the above four methods, and any method that can trigger the determination of the coordinated transmission parameter is applicable to the embodiment of the present invention.

[0149] If the trigger condition is receiving a coordination request message from the base station to which the serving cell belongs or receiving a coordination request message from the base station to which the serving cell belongs, the base station to which the coordinated cell belongs in step 601 only sends the coordinated transmission parameters to the message sender;

[0150] If the trigger condition is that the set transmission period arrives or the coordinated transmission parameter of the coordinated cell changes, the base station to which the coordinated cell belongs in step 601 sends the coordinated transmission parameter to all serving cells corresponding to the coordinated cell.

[0151] Among them, according to different cooperative transmission capabilities, the base station to which the coordinated cell belongs in step 601 determines the coordinated transmission parameters in different ways, and several are listed below.

[0152] The coordinated transmission parameters in the mode 1 to the mode 3 are all service priority parameters; the coordinated transmission parameter in the mode 4 is the coordination capability parameter; the value of the coordinated transmission parameter in the mode 5 is the physical resource occupation.

[0153] Method 1: The cooperative transmission parameter is a service priority parameter.

[0154] The base station to which the coordinated cell belongs determines the service priority of each service transmitted in the coordinated cell, and determines the service priority parameter according to the highest service priority, and uses the service priority parameter as the coordinated transmission parameter.

[0155] Since multiple services are being transmitted in the coordinated cell when the coordinated transmission parameters are determined, the highest service priority among the service priorities of each service is selected at this time. If there is no service being transmitted in the current cooperative cell, it is determined that the highest service priority is 0 (that is, the minimum service priority) or the lowest service priority is taken as the highest service priority of the current service.

[0156] Manner 2: The cooperative transmission parameter is a service priority parameter.

[0157] The base station to which the coordinated cell belongs determines the service priority of the most frequent service in the coordinated cell, and determines the service priority parameter according to the service priority, and uses the service priority parameter as the coordinated transmission parameter.

[0158] Among them, the most frequent business refers to the business with the largest business volume or the largest number of transmissions initiated in the coordinated cell within a set time.

[0159] The length of the set time can be set according to the needs; it can be determined according to the needs whether to use the traffic volume or the number of transmissions initiated as the most frequent business measurement standard.

[0160] In the specific implementation process, preferably, the base station to which the coordinated cell belongs can determine the most frequent service according to the length of the set time period; of course, the most frequent service can also be determined when the coordinated transmission parameters need to be determined.

[0161] If there are multiple businesses that are the most frequent businesses, the highest business priority among the business priorities of the most frequent businesses is determined.

[0162] Manner 3: The cooperative transmission parameter is a service priority parameter.

[0163] The base station to which the coordinated cell belongs determines the service attribute corresponding to the physical resource range to which the physical resource occupancy in the coordinated cell belongs based on the preset correspondence between the physical resource range and the service attribute, and determines the coordinated transmission capability of the coordinated cell according to the service attribute The business priority of each business, the business priority parameter is determined according to the highest business priority, and the business priority parameter is used as the coordinated transmission parameter.

[0164] In a specific implementation process, the corresponding relationship between the physical resource range and service attributes of each coordinated cell may be the same or different.

[0165] Since each business has business attributes, the business attributes of different businesses may be the same or different; in the correspondence between physical resource ranges and business attributes, each physical resource range may correspond to one business attribute, or it may correspond to multiple businesses Attributes. After determining the physical resource occupation in the cooperative cell, the physical resource range to which the physical resource occupation belongs is further determined, and then the physical resource range to which the physical resource occupation belongs can be determined according to the correspondence between the physical resource range and the service attribute Corresponding business attributes (may be one or multiple); correspondingly, according to the determined business attributes, the corresponding business (may be one or multiple) can be determined for the business attribute, so that the cooperative cell can be Coordinated transmission of each business (may be one or multiple).

[0166] For methods one to three, the service priority parameter is a Label parameter or Qo information. Among them, the Label parameter can be seen in Table 1.

[0167] The method of exchanging the Label parameter in QoS parameters has a small amount of information exchanged, but because the scheduling algorithms of each cell are different from each other, the service of the same Label has different service priorities in different cells, which makes it difficult to implement strict service-based services. Priority scheduling, but it can be ensured that there will be no situations in which services with very low priority preempt the resources of services with high priority. For example, Best effort TCP bulk data (Label 8) will not take precedence over Realtime (Label 1).

[0168] The advantage of interacting all QoS parameters is that strict scheduling based on business priority can be realized, but the amount of information exchanged is relatively large.

[0169] The specific interaction method used can be preset or adjusted according to the network conditions.

[0170] Method 4: The cooperative transmission parameter is a cooperative capability parameter.

[0171] The base station to which the coordinated cell belongs determines the physical resource occupancy in the coordinated cell, and compares the physical resource occupancy with a threshold value, generates a coordination capability parameter based on the comparison result, and uses the coordination capability parameter as a coordination transmission parameter.

[0172] Among them, the coordination capability parameter indicates whether the corresponding coordinated cell can participate in coordinated transmission.

[0173] In the specific implementation process, the coordination capability parameter only needs to occupy 1 bit. For example, "1" indicates that the corresponding coordinated cell can participate in coordinated transmission; "0" indicates that the corresponding coordinated cell cannot participate in coordinated transmission.

[0174] After the base station to which the coordinated cell belongs determines the physical resource occupation in the coordinated cell, if the physical resource occupation is less than the threshold, it is determined that the coordinated cell can participate in the coordinated transmission; otherwise, it is determined that the coordinated cell cannot participate in the coordinated transmission.

[0175] The threshold value can be set and adjusted as required. For example, the size of the threshold value can be adjusted according to the operating status of the cell. If the operating status is good, the threshold value can be increased; otherwise, the threshold value can be reduced.

[0176] Mode 5: The value of the cooperative transmission parameter is the physical resource occupation.

[0177] The base station to which the coordinated cell belongs determines the physical resource occupation in the coordinated cell, and uses the physical resource occupation as the value of the coordinated transmission parameter.

[0178] Which of the above five methods is used can be set in the protocol, or it can be negotiated between base stations.

[0179] In step 602, if the coordinated transmission parameter received by the base station to which the serving cell belongs is a service priority parameter, since the received service priority needs to be compared with the service priority of the coordinated data, the base station to which the serving cell belongs needs to transmit In the case of cooperative data, the service priority corresponding to each coordinated cell is determined according to the received service priority parameter, and the coordinated cell that can participate in CoMP transmission is selected from the coordinated cells.

[0180] Wherein, the service priority corresponding to the coordinated cell selected by the base station to which the serving cell belongs is not greater than the service priority of the coordinated data to be transmitted.

[0181] In step 602, if the coordinated transmission parameter received by the base station to which the serving cell belongs is a coordinated capability parameter, since the coordinated capability parameter indicates whether the corresponding coordinated cell can participate in coordinated transmission, there is no need to wait for the required coordinated data, and the base station to which the serving cell belongs The coordination capability parameters corresponding to each coordinated cell can be determined immediately, and the coordinated cells that can participate in CoMP transmission can be selected from the coordinated cells.

[0182] The capability indication parameter corresponding to the coordinated cell selected by the base station to which the serving cell belongs indicates that the corresponding coordinated cell can participate in coordinated transmission.

[0183] In step 602, if the value of the coordinated transmission parameter received by the base station to which the serving cell belongs is the physical resource occupation, the base station to which the serving cell belongs determines the correspondence of the received coordinated cell according to the preset correspondence between the physical resource range and the service attribute The service attribute corresponding to the physical resource range to which the physical resource occupancy belongs, and the service priority of each service that the cooperative cell can coordinate transmission is determined according to the service attribute, and the highest service priority corresponding to the cooperative cell is determined from the service priority of each service .

[0184] Since the received service priority needs to be compared with the service priority of the coordinated data, the base station to which the serving cell belongs, when there is coordinated data to be transmitted, selects coordinated cells that can participate in CoMP transmission from the coordinated cells.

[0185] Wherein, the highest service priority corresponding to the coordinated cell selected by the base station to which the serving cell belongs is not greater than the service priority of the coordinated data.

[0186] In a specific implementation process, the base station to which the serving cell belongs can also determine the highest service priority when there is coordinated data that needs to be transmitted, and then determine the coordinated cell participating in CoMP transmission from the coordinated cells.

[0187] Wherein, if there is downlink coordinated data to be sent, after step 602, it may further include:

[0188] Step a603: The base station to which the serving cell belongs sends downlink coordinated data to the base station to which the coordinated cell that can participate in CoMP transmission belongs.

[0189] Step a604: The base station to which the coordinated cell belongs sends the coordinated data to the corresponding terminal after receiving the coordinated data from the base station to which the serving cell belongs.

[0190] Wherein, if there is uplink coordinated data to be received, after step 602, it may further include:

[0191] Step b603: The base station to which the serving cell belongs sends uplink scheduling information to the base station where the coordinated cell that can participate in CoMP transmission is located.

[0192] Step b604: The base station to which the coordinated cell belongs receives the uplink scheduling information or, according to the uplink scheduling information, receives the coordinated data from the terminal through the uplink physical resource.

[0193] If there is data transmission on the downlink physical resource (or uplink physical resource) that needs to carry coordinated data, the base station to which the coordinated cell belongs in step 604 stops the data transmission on the downlink physical resource (or uplink physical resource), and passes the downlink The physical resource sends downlink coordinated data (or receives uplink coordinated data through the uplink physical resource). That is to say, after receiving the downlink coordinated data (or uplink scheduling information) from the base station to which the serving cell belongs, the base station to which the coordinated cell belongs should send the downlink coordinated data (or receive the uplink coordinated data of the corresponding terminal) to the corresponding terminal first. , Reschedule and transmit the data of the cell outside the physical resource.

[0194] In order to improve the transmission quality of coordinated data, when the base station to which the serving cell belongs in step 603 has coordinated data that needs to be coordinated for transmission, it can further select coordinated cells that meet the transmission conditions from the determined coordinated cells that can participate in CoMP transmission as the transmission A collaborative cell for collaborative data.

[0195] Wherein, the base station to which the serving cell belongs determines that the transmission condition is satisfied when one or more of the following conditions are met:

[0196] The channel conditions between the selected cooperative cell and the terminal requiring assistance meet the transmission requirements;

[0197] The signal of the selected cooperative cell is synchronized with the signal of the serving cell.

[0198] Such as Figure 7 As shown, the method for sending collaborative data in the embodiment of the present invention includes the following steps:

[0199] Step 701: After determining the coordinated cell participating in CoMP transmission from the coordinated cell according to the coordinated transmission parameters, the base station to which the serving cell belongs sends downlink coordinated data to the base station where the coordinated cell capable of participating in CoMP transmission is located.

[0200] The coordinated transmission parameter is determined by the base station to which the coordinated cell belongs according to the coordinated transmission capability of the coordinated cell.

[0201] Step 702: The base station to which the coordinated cell belongs sends the received coordinated data to the terminal.

[0202] If there is data transmission on the physical resource that needs to carry the coordinated data, the base station 40 to which the coordinated cell belongs stops the data transmission on the physical resource, and sends the coordinated data through the physical resource. That is, the base station 40 to which the coordinated cell belongs, after receiving the coordinated data from the base station to which the serving cell belongs, should preferentially send the coordinated data to the corresponding terminal, and then schedule and transmit the data of the cell in addition to the physical resources.

[0203] In order to improve the transmission quality of coordinated data, in step 702, when the base station to which the serving cell belongs has coordinated data that needs to be sent, it can further select coordinated cells that meet the transmission conditions from the determined coordinated cells that can participate in CoMP transmission as the sending coordinated cell. Cooperative cell for data.

[0204] Wherein, the base station to which the serving cell belongs determines that the transmission condition is satisfied when one or more of the following conditions are met:

[0205] The channel conditions between the selected cooperative cell and the terminal requiring assistance meet the transmission requirements;

[0206] The signal of the selected cooperative cell is synchronized with the signal of the serving cell.

[0207] Such as Figure 8 As shown, the method for receiving collaborative data in the embodiment of the present invention includes the following steps:

[0208] Step 801: After determining the coordinated cell participating in CoMP transmission from the coordinated cell according to the coordinated transmission parameters, the base station to which the serving cell belongs sends uplink scheduling information to the base station where the coordinated cell capable of participating in CoMP transmission is located.

[0209] The coordinated transmission parameter is determined by the base station to which the coordinated cell belongs according to the coordinated transmission capability of the coordinated cell.

[0210] Step 802: The base station to which the coordinated cell belongs receives coordinated data from the terminal through uplink physical resources according to the uplink scheduling information.

[0211] If there is data transmission on the uplink physical resource that needs to carry the coordinated data, the base station to which the coordinated cell belongs stops data transmission on the uplink physical resource, and receives the uplink coordinated data through the uplink physical resource. That is to say, after receiving the uplink scheduling information from the base station to which the serving cell belongs, the base station to which the coordinated cell belongs should prioritize the allocation of uplink resources to the corresponding terminal to receive the uplink coordinated data of the terminal, and then schedule it outside of the physical resource. And transmit the data of this cell.

[0212] In order to improve the transmission quality of coordinated data, when the base station to which the serving cell belongs in step 802 has coordinated data that needs to be received, it can further select a coordinated cell that meets the conditions from the determined coordinated cells that can participate in CoMP transmission as the receiving uplink coordinated cell. Cooperative cell for data.

[0213] Wherein, the base station to which the serving cell belongs determines that the transmission condition is satisfied when one or more of the following conditions are met:

[0214] The channel conditions between the selected cooperative cell and the terminal requiring assistance meet the transmission requirements;

[0215] The signal of the selected cooperative cell is synchronized with the signal of the serving cell.

[0216] Wherein, after step 802, it may further include:

[0217] Step 803: After receiving the uplink data, the base station to which the coordinated cell belongs sends the uplink data or the preliminary processing result of the uplink data to the base station to which the serving cell belongs.

[0218] Step 804: The base station to which the serving cell belongs receives the uplink coordinated data or the preliminary processing result of the uplink coordinated data sent by the base station of the coordinated cell, and performs joint processing with the uplink data received by the cell to obtain the final demodulation result.

[0219] It can be seen from the foregoing embodiment that after the base station to which the coordinated cell belongs in the embodiment of the present invention meets the trigger condition, the coordinated transmission parameter is determined according to the coordinated transmission capability of the coordinated cell, and the coordinated transmission parameter is sent to the base station to which the serving cell belongs; The base station to which the serving cell belongs determines a coordinated cell participating in CoMP transmission from the coordinated cell according to the received coordinated transmission parameter. Since the base station where the serving cell is located will determine the corresponding coordinated cell based on the current coordinated transmission capability of the coordinated cell, avoiding the situation that the determined coordinated cell that can participate in CoMP transmission cannot perform coordinated transmission due to insufficient capacity, thereby improving the CoMP technology The performance further guarantees the reliability of data transmission and the reasonable transmission of different UE data between cells while performing CoMP transmission.

[0220] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.