Patent Application
20150358952
The present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
In a Universal Mobile Telecommunications System (UMTS) system, downlink transmission channels include a dedicated channel (DCH) and a high speed downlink shared channel (HS-DSCH); and uplink transmission channels include the DCH and an enhanced dedicated channel (E-DCH).
The HS-DSCH and the E-DCH are both high-speed packet access (HSPA) channels. A circuit switched domain (CS) service such as a voice service may be carried on a DCH, or may be carried on an HSPA channel such as an E-DCH or an HS-DSCH. A CS service carried on an HSPA channel is referred to as CS over HSPA. The CS over HSPA requires high reliability.
A multiflow (MF) transmission feature is introduced in a UMTS technology, where this feature allows multiple intra-frequency or inter-frequency cells to be configured, to send same or different HS-DSCH data for same UE, so as to increase a throughput of a cell-edge user. In an existing MF solution, for same data collaboratively sent by a primary serving cell and one or more collaborative serving cells in the MF, a UE uses a selective combination method when receiving the data, that is, selectively receives data sent by one cell, but discards data sent by another cell.
However, reliability of the selective combination is not high, and when a cell-edge UE transmits data with a high requirement on reliability such as a CS over HSPA or signaling radio bearer (SRB) service, it is exposed to a call drop.
In view of this, embodiments of the present application provide a data transmission method and apparatus, to resolve a technical problem that reliability of an existing UMTS multiflow transmission solution is not high.
According to a first aspect, a data transmission method is provided, and the method includes: sending at least two groups of same data to user equipment; and instructing the user equipment to perform softer combination on the received at least two groups of same data.
According to the first aspect, in a first possible implementation manner, the sending at least two groups of same data to user equipment includes: sending, by a base station, the same data to the user equipment by using at least two cells; or, sending, by a base station, the same data to the user equipment by using at least two hybrid automatic repeat request HARQ processes or at least two transmission time intervals TTIs in one cell.
In a second possible implementation manner, with reference to the first aspect or the first possible implementation manner, the instructing the user equipment to perform softer combination on the received at least two groups of same data includes: adding a softer combination instruction to a downlink shared control channel HS-SCCH and sending the softer combination instruction to the user equipment, where the softer combination instruction is used to instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a third possible implementation manner, with reference to the first aspect or the first possible implementation manner or the second possible implementation manner, the adding the softer combination instruction to the HS-SCCH includes: using a bit in the HS-SCCH to indicate the softer combination instruction, or using a parity relationship of a code channel occupied by the HS-SCCH to indicate the softer combination instruction.
In a fourth possible implementation manner, with reference to the first aspect or any one of the first possible implementation manner to the third possible implementation manner, the method further includes: sending a time offset configured by a radio network controller to the user equipment, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, to instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fifth possible implementation manner, with reference to the first aspect or any one of the first possible implementation manner to the fourth possible implementation manner, the method further includes: sending a HARQ process identifier Process ID combination configured by a radio network controller to the user equipment, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, to instruct the user equipment to perform softer combination on data received from the at least two cells.
According to a second aspect, a data transmission method is provided, and the method includes: receiving, by user equipment, at least two groups of same data sent by a network side; and performing softer combination on the at least two groups of same data according to an instruction of the network side.
In a first possible implementation manner, according to the second aspect, the receiving, by user equipment, at least two groups of same data sent by a network side includes: receiving, by the user equipment, the at least two groups of same data that are sent by a base station by using at least two cells, or receiving the at least two groups of same data that are sent by a base station by using at least two HARQ processes or at least two transmission time intervals TTIs in one cell.
In a second possible implementation manner, with reference to the second aspect or the first possible implementation manner, the performing softer combination on the at least two groups of same data according to an instruction of the network side includes: receiving a softer combination instruction that is carried in an HS-SCCH and sent by the base station, and performing softer combination on the at least two groups of same data according to the softer combination instruction.
In a third possible implementation manner, with reference to the second aspect or the first possible implementation manner or the second possible implementation manner, the softer combination instruction is indicated by using a bit in the HS-SCCH or by using a parity relationship of a code channel occupied by the HS-SCCH.
In a fourth possible implementation manner, with reference to the second aspect or any one of the first possible implementation manner to the third possible implementation manner, the performing softer combination on the at least two groups of same data according to an instruction of the network side includes: receiving a time offset from a radio network controller, and performing softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fifth possible implementation manner, with reference to the second aspect or any one of the first possible implementation manner to the fourth possible implementation manner, the performing softer combination on data that is received from the at least two cells within a time indicated by the time offset includes: performing softer combination on received HS-DSCH data of a cell whose paired subframe is earlier in multiflow transmission, and HS-DSCH data, received within the time indicated by the time offset, of a cell whose paired subframe is later in multiflow transmission; or performing softer combination on HS-DSCH data received by a receiving reference cell, and HS-DSCH data received by a non-receiving reference cell within the time indicated by the time offset.
In a sixth possible implementation manner, with reference to the second aspect or any one of the first possible implementation manner to the fifth possible implementation manner, the performing softer combination on the at least two groups of same data according to an instruction of the network side includes: receiving a HARQ Process ID combination from a radio network controller, and performing softer combination on data that is received from the at least two cells and uses a HARQ Process ID that belongs to the HARQ Process ID combination.
According to a third aspect, a data transmission method is provided, and the method includes: sending, by a radio network controller, instruction information to a base station, to instruct the base station to send at least two groups of same data to user equipment; and sending, by the radio network controller, instruction information to the user equipment, to instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a first possible implementation manner, according to the third aspect, the instructing the base station to send at least two groups of same data to user equipment includes: instructing the base station to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the third aspect or the first possible implementation manner, the instruction information is specifically a softer combination instruction, and the sending, by a radio network controller, instruction information to a base station includes: adding the softer combination instruction to an HS-DSCH frame protocol FP and sending the softer combination instruction to the base station, to instruct the base station to send the at least two groups of same data to the user equipment.
In a third possible implementation manner, with reference to the third aspect or the first possible implementation manner or the second possible implementation manner, the instruction information is specifically a softer combination instruction, and the sending, by a radio network controller, instruction information to a base station includes: configuring the softer combination instruction in radio link setup or addition or reconfiguration request signaling based on a MAC-d flow identifier or a queue identifier or a logical channel identifier, to instruct the base station to send the at least two groups of same data to the user equipment.
In a fourth possible implementation manner, with reference to the third aspect or any one of the first possible implementation manner to the third possible implementation manner, the instruction information is specifically a time offset configured by the radio network controller, and is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, and instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fifth possible implementation manner, with reference to the third aspect or any one of the first possible implementation manner to the fourth possible implementation manner, the instruction information is specifically a HARQ Process ID combination configured by the radio network controller, and is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, and instruct the user equipment to perform softer combination on data received from the at least two cells.
According to a fourth aspect, a base station is provided, and the base station includes: a sending module, configured to send at least two groups of same data to user equipment; and an instruction module, configured to instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a first possible implementation manner, according to the fourth aspect, the sending module is specifically configured to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the fourth aspect or the first possible implementation manner, the instruction module is specifically configured to add a softer combination instruction to an HS-SCCH and send the softer combination instruction to the user equipment, to instruct the user equipment to perform softer combination on the received same data sent by the at least two cells.
In a third possible implementation manner, with reference to the fourth aspect or the first possible implementation manner or the second possible implementation manner, the instruction module is specifically configured to use a bit in the HS-SCCH to indicate the softer combination instruction, or use a parity relationship of a code channel occupied by the HS-SCCH to indicate the softer combination instruction.
In a fourth possible implementation manner, with reference to the fourth aspect or any one of the first possible implementation manner to the third possible implementation manner, the instruction module is specifically configured to send a time offset configured by a radio network controller to the user equipment, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, to instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fifth possible implementation manner, with reference to the fourth aspect or any one of the first possible implementation manner to the fourth possible implementation manner, the instruction module is specifically configured to send a HARQ process identifier Process ID combination configured by a radio network controller to the user equipment, where the HARQ
Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, to instruct the user equipment to perform softer combination on data received from the at least two cells.
According to a fifth aspect, user equipment is provided, and the user equipment includes: a receiving module, configured to receive at least two groups of same data sent by a network side; and a softer combination module, configured to perform softer combination on the at least two groups of same data according to an instruction of the network side.
In a first possible implementation manner, according to the fifth aspect, the receiving module is specifically configured to receive the same data that is sent by a base station by using at least two cells, or receive the same data that is sent by a base station by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the fifth aspect or the first possible implementation manner, the receiving module is further configured to receive a softer combination instruction that is carried in an HS-SCCH and sent by the base station; and the softer combination module is specifically configured to perform softer combination on the at least two groups of same data according to the softer combination instruction.
In a third possible implementation manner, with reference to the fifth aspect or the first possible implementation manner or the second possible implementation manner, the receiving module is further configured to receive a time offset from a radio network controller; and the softer combination module is specifically configured to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fourth possible implementation manner, with reference to the fifth aspect or any one of the first possible implementation manner to the third possible implementation manner, the receiving module is further configured to receive a HARQ Process ID combination from a radio network controller; and the softer combination module is specifically configured to perform softer combination on data that is received from the at least two cells and uses a HARQ Process ID that belongs to the HARQ Process ID combination.
According to a sixth aspect, a radio network controller is provided, and the radio network controller includes: a generating module, configured to generate instruction information; and a sending module, configured to send the instruction information to a base station and user equipment, to instruct the base station to send at least two groups of same data to the user equipment, and instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a first possible implementation manner, according to a sixth aspect, the instruction information is specifically used to instruct the base station to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the sixth aspect or the first possible implementation manner, the generating module is specifically configured to generate a softer combination instruction as the instruction information; and the sending module is specifically configured to add the softer combination instruction to an HS-DSCH frame protocol FP and send the softer combination instruction to the base station, to instruct the base station to send the at least two groups of same data to the user equipment.
In a third possible implementation manner, with reference to the sixth aspect or the first possible implementation manner or the second possible implementation manner, the generating module is specifically configured to generate a softer combination instruction as the instruction information; and the sending module is specifically configured to configure the softer combination instruction in radio link setup or addition or reconfiguration request signaling based on a MAC-d flow or a queue or a logical channel ID, to instruct the base station to send the at least two groups of same data to the user equipment.
In a fourth possible implementation manner, with reference to the sixth aspect or any one of the first possible implementation manner to the third possible implementation manner, the generating module is specifically configured to configure a time offset as the instruction information, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, and instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fifth possible implementation manner, with reference to the sixth aspect or any one of the first possible implementation manner to the fourth possible implementation manner, the generating module is specifically configured to configure a HARQ Process ID combination as the instruction information, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, and instruct the user equipment to perform softer combination on data received from the at least two cells.
According to a seventh aspect, a base station is provided, and the base station includes: a transmitter, configured to send at least two groups of same data to user equipment; and a processor, configured to generate instruction information, where the instruction information is sent to the user equipment by using the transmitter, and is used to instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a first possible implementation manner, according to the seventh aspect, the transmitter is specifically configured to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the seventh aspect or the first possible implementation manner, the processor is configured to generate a softer combination instruction as the instruction information; and the transmitter is further configured to add the softer combination instruction to an HS-SCCH and send the softer combination instruction to the user equipment, where the softer combination instruction is used to instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a third possible implementation manner, with reference to the seventh aspect or the first possible implementation manner or the second possible implementation manner, the transmitter is further configured to send a time offset configured by a radio network controller to the user equipment, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, to instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fourth possible implementation manner, with reference to the seventh aspect or any one of the first possible implementation manner to the third possible implementation manner, the transmitter is further configured to send a HARQ Process ID combination configured by a radio network controller to the user equipment, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, to instruct the user equipment to perform softer combination on data received from the at least two cells.
According to an eighth aspect, user equipment is provided, and the user equipment includes: a receiver, configured to receive at least two groups of same data sent by a network side; and a processor, configured to perform softer combination on the at least two groups of same data according to an instruction of the network side.
In a first possible implementation manner, according to the eighth aspect, the receiver is specifically configured to receive the same data that is sent by a base station by using at least two cells, or receive the same data that is sent by a base station by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the eighth aspect or the first possible implementation manner, the receiver is further configured to receive a softer combination instruction that is carried in an HS-SCCH and sent by the base station; and the processor is specifically configured to perform softer combination on the at least two groups of same data according to the softer combination instruction.
In a third possible implementation manner, with reference to the eighth aspect or the first possible implementation manner or the second possible implementation manner, the receiver is further configured to receive a time offset from a radio network controller; and the processor is specifically configured to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fourth possible implementation manner, with reference to the eighth aspect or any one of the first possible implementation manner to the third possible implementation manner, the receiver is further configured to receive a HARQ Process ID combination from a radio network controller; and the processor is specifically configured to perform softer combination on data that is received from the at least two cells and uses a HARQ Process ID that belongs to the HARQ Process ID combination.
According to a ninth aspect, a radio network controller is provided, and the radio network controller includes: a processor, configured to generate instruction information; and a transmitter, configured to send the instruction information to a base station and user equipment, to instruct the base station to send at least two groups of same data to the user equipment, and instruct the user equipment to perform softer combination on the received at least two groups of same data.
In a first possible implementation manner, according to the ninth aspect, the instruction information is specifically used to instruct the base station to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In a second possible implementation manner, with reference to the ninth aspect or the first possible implementation manner, the processor is specifically configured to generate a softer combination instruction as the instruction information; and the transmitter is specifically configured to add the softer combination instruction to an HS-DSCH frame protocol FP and send the softer combination instruction to the base station, to instruct the base station to send the at least two groups of same data to the user equipment.
In a third possible implementation manner, with reference to the ninth aspect or the first possible implementation manner or the second possible implementation manner, the processor is specifically configured to generate a softer combination instruction as the instruction information; and the transmitter is specifically configured to configure the softer combination instruction in radio link setup or addition or reconfiguration request signaling based on a MAC-d flow or a queue or a logical channel ID, to instruct the base station to send the at least two groups of same data to the user equipment.
In a fourth possible implementation manner, with reference to the ninth aspect or any one of the first possible implementation manner to the third possible implementation manner, the processor is specifically configured to configure a time offset as the instruction information, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, and instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In a fifth possible implementation manner, with reference to the ninth aspect or any one of the first possible implementation manner to the fourth possible implementation manner, the processor is specifically configured to configure a HARQ Process ID combination as the instruction information, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, and instruct the user equipment to perform softer combination on data received from the at least two cells.
The embodiments of the present application use a technical solution in which a network side sends at least two groups of same data to user equipment and instructs the user equipment to perform softer combination on the received at least two groups of same data, so that in a UMTS multiflow transmission solution, the user equipment may process the received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
To describe the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present application, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.
To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following clearly describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
The technologies described in this specification may be applied to various communications systems, for example, current 2G and 3G communications systems and a next-generation communications system, for example, a Global System for Mobile Communications (GSM), a Code Division Multiple Access (CDMA) system, a Time Division Multiple Access (TDMAs) system, a Wideband Code Division Multiple Access (WCDMA) system, a Frequency Division Multiple Access (FDMA) system, an Orthogonal Frequency-Division Multiple Access (OFDMA) system, a single-carrier FDMA (SC-FDMA) system, a General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, and other communications systems.
Various aspects are described in this specification with reference to user equipment and/or a base station and/or a base station controller.
Referring to
101. Send at least two groups of same data to user equipment.
When user equipment (UE) is in a multiflow transmission state, a base station on a network side may send at least two groups of same data to the user equipment so as to improve transmission reliability. The same data may be understood as a same group of data. In other words, a group of data is sent to the user equipment through different paths. For example, the base station may send the at least two groups of same data to the user equipment by using at least two cells, where the at least two cells may be cells that belong to a same base station, or may be cells of different base stations; or the base station may send the at least two groups of same data to the user equipment by using at least two hybrid automatic repeat request (HARQ) processes in one cell or at least two transmission time intervals (TTI) in one cell.
Before sending data, the base station needs to first determine whether the data needs to be scheduled by using at least two cells, or at least two HARQ processes in one cell or at least two TTIs in one cell, where there are two manners of the determining. In one manner, the base station performs determining according to a preset policy, for example, determines according to a priority to schedule HS-DSCH data that is corresponding to a high-priority queue to the UE by using at least two cells; or determines, according to a priority and UE power headroom (UPH) when UPH reported by the UE is small, to schedule HS-DSCH data that is corresponding to a high-priority queue to the UE by using at least two cells. In the other manner, instruction information configured by a radio network controller (RNC) such as a softer combination instruction is acquired, and it is determined according to the softer combination instruction that data of the UE needs to be scheduled by using at least two cells, or at least two HARQ processes in one cell or at least two TTIs in one cell. When the UE is in the multiflow transmission state, the RNC may configure a softer combination instruction in signaling such as a radio link setup or addition or reconfiguration request based on a single MAC for dedicated channels flow (MAC-d flow) or a queue or a logical channel identifier (ID), where the softer combination instruction may be indicated by using one or several bits, and is used to indicate that HS-DSCH data corresponding to the MAC-d flow or the queue or the logical channel ID needs to be scheduled to the UE by using at least two cells, or at least two HARQ processes in one cell or at least two TTIs in one cell.
102: Instruct the user equipment to perform softer combination on the received at least two groups of same data.
When or after sending the at least two groups of same data to the UE by using the at least two cells, or the at least two HARQ processes in one cell or the at least two TTIs in one cell, the base station further needs to instruct the UE to perform softer combination on the received at least two groups of same data. Therefore, the UE needs to have a capability of performing softer combination. The softer combination is pre-decoding soft-bit combination, and may also be referred to as softer handover combination or HARQ combination. Compared with selective combination, this combination manner has higher reliability.
In conclusion, this embodiment of the present application provides a data transmission method, and uses a technical solution in which a network side sends at least two groups of same data to user equipment and instructs the user equipment to perform softer combination on the received at least two groups of same data, so that in a UMTS multiflow transmission solution, the user equipment may process the received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
In an implementation manner shown in
In step 201 shown in
In step 203 shown in
After acquiring the softer combination instruction, the base station may add the softer combination instruction to an HS-SCCH and send the softer combination instruction to the UE, as shown in steps 204 and 205 in
After receiving the softer combination instruction, the UE performs softer combination and decoding on the HS-DSCH data received from the at least two cells, or the at least two HARQ processes in one cell or the at least two TTIs in one cell, and after the softer combination and decoding are successful, the UE may feed back an acknowledgement response (ACK) to the base station by using a high speed dedicated physical control channel (High speed Dedicated Physical Control Channel, HS-DPCCH), as shown in step 206 in
It should be noted that, a concept of paired subframes is defined in the multiflow transmission. As shown in
Thereby, adding the softer combination instruction to an HS-SCCH and sending the softer combination instruction to the UE may be adding one softer combination instruction only to an HS-SCCH of the cell whose paired subframe is earlier, or may be separately adding one softer combination instruction to HS-SCCHs of at least two cells that schedule the same data. If one softer combination instruction is added only to the HS-SCCH of the cell whose paired subframe is earlier, all redundancy versions (RV) of the cell whose paired subframe is earlier and another cell need to have predefined or preconfigured mapping relationships, for example, the RV used by the cell whose paired subframe is earlier is permanently 1 less than the RV used by another cell, as shown in the following Table 1.
In another implementation manner shown in
When the UE is in the multiflow transmission state, as shown in steps 401 to 403 in
The time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, which specifically is a maximum interval between a time point at which a cell whose paired subframe is earlier in multiple cells that participate in multiflow transmission sends HS-DSCH data and a time point at which a cell whose paired subframe is later sends the same data to the UE, thereby instructing the user equipment to perform softer combination on the HS-DSCH data received the cell whose paired subframe is earlier, and HS-DSCH data of another cell received within the time indicated by the time offset, where the maximum interval may be, for example, 6 slots.
In the implementation manner shown in
After receiving the HS-DSCH data from the cell whose paired subframe is earlier, the UE may receive the HS-DSCH data of the another cell within the time indicated by the time offset; then, the UE determines that the data scheduled by the multiple cells to the UE is the same, and may perform a softer combination operation. After the softer combination and decoding are successful, the UE may feed back an ACK to the base station by using an HS-DPCCH.
An example is described below. Referring to
In another implementation manner shown in
When the UE is in the multiflow transmission state, the RNC may configure the HARQ Process ID combination in a message such as a radio link setup or addition or reconfiguration request based on a single MAC-d flow or queue or logical channel ID, as shown in steps 601 to 603 in
After receiving HS-DSCH data from a HARQ process ID preconfigured by the cell whose paired subframe is earlier and receiving the same HS-DSCH data from a HARQ process preconfigured by another cell, the UE performs softer combination and decoding. After the softer combination and decoding are successful, an ACK is fed back to the base station by using an HS-DPCCH.
An example is described below. Referring to
The UE detects from an HS-SCCH channel that CELL1 sends HS-DSCH data by using the HARQ process 0 and CELL2 sends HS-DSCH data by using the HARQ process 1; in this case, it is considered that the HS-DSCH data received from paired subframes of CELL1 and CELL2 is the same and softer combination may be performed.
It should be noted that any combination of the foregoing solutions, for example, a combination of a time offset and a HARQ process combination, falls within the protection scope of the present application. Assuming that CELL1 is the cell whose paired subframe is earlier, CELL2 is the cell whose paired subframe is later, and a configured HARQ process ID combination includes a HARQ process 0 and a HARQ process 1, if the UE receives, in the HARQ process 0, HS-DSCH data sent by CELL1, and receives, within a configured time offset in the HARQ process 1, HS-DSCH data sent by CELL2, it is considered that the two cells send same data and softer combination may be performed.
The foregoing mainly describes an example in which at least two cells send at least two groups of same data to user equipment. The following additionally describes another implementation manner in which at least two groups of same data are sent to user equipment by using sending processes of at least two HARQ processes or at least two transmission time intervals TTIs in one cell.
Identifiers of HARQ processes for sending same data may be predefined, for example, it is predefined that a HARQ Process ID0 and a HARQ Process ID1 send same data to a UE; or, identifiers of HARQ processes for sending same data may be configured, for example, a radio network controller (RNC) configures for a user equipment and a base station that same data is sent in a HARQ Process ID0 and a HARQ Process ID1. A quantity of HARQ processes may be predefined, for example, predefined to be 2; or may be configured, for example, a quantity of HARQ processes configured by the RNC for the UE and the base station is 2. When sending an HS-SCCH to the UE, the base station informs the UE that data sent in a predefined quantity of HARQ processes is the same. For example, a quantity of HARQ processes that consecutively send same data is 2, and the base station adds a process identifier 0 to the HS-SCCH, and informs the UE that same data is sent in 2 consecutive processes, which indicates that data sent by in HARQ process 0 and the HARQ process 1 is the same. The UE performs softer combination on the received same data sent in the at least two HARQ processes, and if the data is correctly decoded, feeds back an ACK; otherwise, feeds back an NACK. It should be noted that, HARQ processes used to send same data may be consecutive, or may be non-consecutive. For example, the HARQ process 0 and a HARQ process 3 may send same data to the UE.
Alternatively, the base station sends same data to the UE in a same HARQ Process ID. For example, the UE receives HS-DSCH data in the HARQ process ID1, and then receives HS-DSCH data in the HARQ Process ID1 within a time window T; in this case, it is considered that the two groups of data are the same and softer combination may be performed. The time window T is configurable or predefined.
The foregoing describes in detail the data transmission method provided in this embodiment of the present application by using a base station as an execution body. By using the method, in a UMTS multiflow transmission solution, user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
801: User equipment receives at least two groups of same data sent by a network side.
802: Perform softer combination on the at least two groups of same data according to an instruction of the network side.
The receiving, by user equipment, at least two groups of same data sent by a network side in 801 specifically may be: receiving, by the user equipment, the at least two groups of same data that are sent by a base station by using at least two cells, or receiving the at least two groups of same data that are sent by a base station by using at least two HARQ processes or at least two TTIs in one cell.
In an implementation manner, the performing softer combination on the at least two groups of same data according to an instruction of the network side in 802 includes: receiving a softer combination instruction that is carried in an HS-SCCH and sent by the base station, and performing softer combination on the at least two groups of same data according to the softer combination instruction. Optionally, the softer combination instruction is indicated by using a bit in the downlink shared control channel HS-SCCH or by using a parity relationship of a code channel occupied by the HS-SCCH.
In another implementation manner, the performing softer combination on the at least two groups of same data according to an instruction of the network side in 802 includes: receiving a time offset from a radio network controller, and performing softer combination on data that is received from the at least two cells within a time indicated by the time offset. Specifically, softer combination is performed on received HS-DSCH data of a cell whose paired subframe is earlier, and HS-DSCH data, received from then on within the time indicated by the time offset toffset, of a cell whose paired subframe is later; or softer combination is performed on HS-DSCH data received by a receiving reference cell, and HS-DSCH data received by a non-receiving reference cell within the time indicated by the time offset.
In still another implementation manner, the performing softer combination on the at least two groups of same data according to an instruction of the network side in 802 includes: receiving a HARQ Process ID combination from a radio network controller, and performing softer combination on data that is received from the at least two cells and uses a HARQ Process ID that belongs to the HARQ Process ID combination.
For detailed description about the foregoing steps in this embodiment, reference may be made to relevant content in the embodiment shown in
The foregoing describes in detail the data transmission method provided in this embodiment of the present application by using user equipment as an execution body. By using the method, in a UMTS multiflow transmission solution, the user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
901: A radio network controller sends instruction information to a base station, to instruct the base station to send at least two groups of same data to user equipment.
902: The radio network controller sends instruction information to the user equipment, to instruct the user equipment to perform softer combination on the received at least two groups of same data.
Further, the instructing the base station to send at least two groups of same data to user equipment includes: instructing the base station to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In an implementation manner, the instruction information is specifically a softer combination instruction.
The sending, by a radio network controller, instruction information to a base station in 901 may include: adding the softer combination instruction to an HS-DSCH frame protocol (FP) and sending the softer combination instruction to the base station, to instruct the base station to send the at least two groups of same data to the user equipment by using the at least two cells, or the at least two HARQ processes in one cell or the at least two TTIs in one cell, where the same data that needs to be sent is data carried in the HS-DSCH FP.
The softer combination instruction may also be configured in radio link setup or addition or reconfiguration request signaling based on a MAC-d flow identifier or a queue identifier or a logical channel identifier, and is used to instruct the base station to send the at least two groups of same data to the user equipment; and the same data that needs to be sent is HS-DSCH data corresponding to the MAC-d flow or the queue or the logical channel ID.
In another implementation manner, the instruction information is specifically a time offset configured by the radio network controller, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, so that the user equipment performs softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In still another implementation manner, the instruction information is specifically a HARQ Process ID combination configured by the radio network controller, and is used to instruct the at least two cells to send the same data to the user equipment separately by using one specific HARQ Process ID in the HARQ Process ID combination, so that the user equipment performs softer combination on the data received from the at least two cells. Optionally, the HARQ Process ID may be configured in a radio link setup or addition or reconfiguration request signaling message based on a single MAC-d flow or queue or logical channel ID.
For detailed description about the foregoing steps in this embodiment, reference may be made to relevant content in the embodiment shown in
The foregoing describes in detail the data transmission method provided in this embodiment of the present application by using user equipment as an execution body. By using the method, in a UMTS multiflow transmission solution, the user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
The sending module 1001 may be specifically configured to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In an implementation manner, the instruction module 1002 may be specifically configured to send a softer combination instruction to the user equipment, to instruct the user equipment to perform softer combination on the received same data sent by the at least two cells. The softer combination instruction may be carried in an HS-SCCH sent to the user equipment.
Still further, the instruction module 1002 may be specifically configured to use a bit in the HS-SCCH to indicate the softer combination instruction, or use a parity relationship of a code channel occupied by the HS-SCCH to indicate the softer combination instruction.
In another implementation manner, the instruction module 1002 may be specifically configured to send a time offset configured by a radio network controller to the user equipment, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, to instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In still another implementation manner, the instruction module 1002 may be specifically configured to send a HARQ process identifier Process ID combination configured by a radio network controller to the user equipment, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, to instruct the user equipment to perform softer combination on the data received from the at least two cells.
For detailed description about the foregoing modules and units in this embodiment, reference may be made to relevant content in the embodiment shown in
The foregoing describes in detail the base station provided in this embodiment of the present application. By using the base station, in a UMTS multiflow transmission solution, user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
The receiving module 1101 may be specifically configured to receive the same data that is sent by a base station by using at least two cells, or receive the same data that is sent by a base station by using at least two HARQ processes or at least two TTIs in one cell.
In an implementation manner, the receiving module 1101 is further configured to receive a softer combination instruction that is carried in an HS-SCCH and sent by the base station; and the softer combination module 1102 is specifically configured to perform softer combination on the at least two groups of same data according to the softer combination instruction.
In another implementation manner, the receiving module 1101 is further configured to receive a time offset from a radio network controller; and the softer combination module 1102 is specifically configured to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In still another implementation manner, the receiving module 1101 is further configured to receive a HARQ Process ID combination from a radio network controller; and the softer combination module 1102 is specifically configured to perform softer combination on data that is received from the at least two cells and uses a HARQ Process ID that belongs to the HARQ Process ID combination.
For detailed description about the foregoing modules and units in this embodiment, reference may be made to relevant content in the embodiment shown in
The foregoing describes in detail the user equipment provided in this embodiment of the present application. In a UMTS multiflow transmission solution, the user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
Further, the instruction information is specifically used to instruct the base station to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
In an implementation manner, the generating module 1201 is specifically configured to generate a softer combination instruction as the instruction information; and the sending module 1202 is specifically configured to add the softer combination instruction to an HS-DSCH frame protocol FP and send the softer combination instruction to the base station, to instruct the base station to send the at least two groups of same data to the user equipment, where the same data that needs to be sent is data carried in the HS-DSCH FP.
Further, the sending module 1202 may be configured to configure the softer combination instruction in radio link setup or addition or reconfiguration request signaling based on a MAC-d flow or a queue or a logical channel ID, to instruct the at least two cells to send the same data to the user equipment, where the same data that needs to be sent is high speed downlink shared channel HS-DSCH data corresponding to the MAC-d flow or the queue or the logical channel ID.
In another implementation manner, the generating module 1201 may be specifically configured to configure a time offset as the instruction information, where the time offset indicates a maximum interval between time points at which the at least two cells send the same data to the user equipment, to instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
In still another implementation manner, the generating module 1201 may be specifically configured to configure a HARQ Process ID combination as the instruction information, to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, so that the user equipment performs softer combination on the data received from the at least two cells.
For detailed description about the foregoing modules and units in this embodiment, reference may be made to relevant content in the embodiment shown in
The foregoing describes in detail the radio network controller provided in this embodiment of the present application. By using the radio network controller, in a UMTS multiflow transmission solution, user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
Optionally, the transmitter 1301 is specifically configured to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
Optionally, the processor 1302 is configured to generate a softer combination instruction as the instruction information; and the transmitter 1301 is further configured to add the softer combination instruction to an HS-SCCH and send the softer combination instruction to the user equipment, where the softer combination instruction is used to instruct the user equipment to perform softer combination on the received at least two groups of same data.
Optionally, the transmitter 1301 is further configured to send a time offset configured by a radio network controller to the user equipment, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, to instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
Optionally, the transmitter 1301 is further configured to send a HARQ Process ID combination configured by a radio network controller to the user equipment, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, to instruct the user equipment to perform softer combination on the data received from the at least two cells.
The foregoing describes in detail the base station provided in this embodiment of the present application. By using the base station, in a UMTS multiflow transmission solution, user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
Optionally, the receiver 1401 is specifically configured to receive the same data that is sent by a base station by using at least two cells, or receive the same data that is sent by a base station by using at least two HARQ processes or at least two TTIs in one cell.
Optionally, the receiver 1401 is further configured to receive a softer combination instruction that is carried in an HS-SCCH and sent by the base station; and the processor 1402 is specifically configured to perform softer combination on the at least two groups of same data according to the softer combination instruction.
Optionally, the receiver 1401 is further configured to receive a time offset from a radio network controller; and the processor 1402 is specifically configured to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
Optionally, the receiver 1401 is further configured to receive a HARQ Process ID combination from a radio network controller; and the processor 1402 is specifically configured to perform softer combination on data that is received from the at least two cells and uses a HARQ Process ID that belongs to the HARQ Process ID combination.
The foregoing describes in detail user equipment provided in this embodiment of the present application. In a UMTS multiflow transmission solution, the user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
Referring to
Optionally, the instruction information is specifically used to instruct the base station to send the same data to the user equipment by using at least two cells, or send the same data to the user equipment by using at least two HARQ processes or at least two TTIs in one cell.
Optionally, the processor 1501 is specifically configured to generate a softer combination instruction as the instruction information; and the transmitter 1502 is specifically configured to add the softer combination instruction to an HS-DSCH frame protocol FP and send the softer combination instruction to the base station, to instruct the base station to send the at least two groups of same data to the user equipment.
Optionally, the processor 1501 is specifically configured to generate a softer combination instruction as the instruction information; and the transmitter 1502 is specifically configured to configure the softer combination instruction in radio link setup or addition or reconfiguration request signaling based on a MAC-d flow or a queue or a logical channel ID, to instruct the base station to send the at least two groups of same data to the user equipment.
Optionally, the processor 1501 is specifically configured to configure a time offset as the instruction information, where the time offset is used to indicate a maximum interval between time points at which the at least two cells send the same data to the user equipment, and instruct the user equipment to perform softer combination on data that is received from the at least two cells within a time indicated by the time offset.
Optionally, the processor 1501 is specifically configured to configure a HARQ Process ID combination as the instruction information, where the HARQ Process ID combination is used to instruct the at least two cells to send the same data to the user equipment separately by using one HARQ Process ID in the HARQ Process ID combination, and instruct the user equipment to perform softer combination on the data received from the at least two cells.
The foregoing describes in detail the radio network controller provided in this embodiment of the present application. By using the radio network controller, in a UMTS multiflow transmission solution, user equipment may process received data in a more reliable softer combination manner, thereby improving reliability, and reducing a call drop rate.
It may be clearly understood by a person skilled in the art that, for the purpose of convenient and brief description, division of the foregoing function modules is taken as an example for illustration. In actual application, the foregoing functions may be allocated to different function modules and implemented according to a requirement, that is, an inner structure of an apparatus is divided into different function modules to implement all or some of the functions described above. For a detailed working process of the foregoing system, apparatus, and unit, reference may be made to a corresponding process in the foregoing method embodiments, and details are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the described apparatus embodiment is merely exemplary. For example, the module or unit division is merely logical function division and may be other division in actual implementation.
For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented by using some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electronic, mechanical, or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional unit.
When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the present application essentially, or the part contributing to the prior art, or all or some of the technical solutions may be implemented in the form of a software product. The software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to perform all or some of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc.
The foregoing describes in detail the data transmission method and the corresponding apparatuses including the base station, the user equipment, and the radio network controller that are provided in the embodiments of the present application. However, the description of the embodiments is only intended to help understand the method and core idea of the present application, and shall not be construed as limiting the present application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present application shall fall within the protection scope of the present application.
This application is a continuation of International Application No. PCT/CN2013/071663, filed on Feb. 19, 2013, which is hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2013/071663 | Feb 2013 | US |
| Child | 14829104 | US |
