CN102892148B - A kind of distribution method, system and the terminal of multi-carrier HSDPA HARQ cachings - Google Patents

Abstract

The present invention discloses a multi-carrier High Speed Downlink Packet Access (HSDPA) Hybrid Automatic Repeat (HARQ) cache allocation method and system, including: the network side adopts an explicit allocation mode or an implicit allocation mode for user equipment (UE) Configure HARQ buffers for each carrier; according to the configuration results on the network side, for the carrier corresponding to the explicit allocation method, the UE divides the corresponding HARQ buffer to each HARQ process of the carrier; for the carrier corresponding to the implicit allocation method, the UE divides the total The remaining HARQ buffers in the HARQ buffers except the HARQ buffers allocated in the explicit allocation mode are evenly allocated to each HARQ process of the carrier. The invention solves the problem that the UE cannot receive all the data sent by the network side due to the discrepancy between the UE HARQ buffer capacity configured by the network side and the actual HARQ buffer capacity of the UE.

Description

A multi-carrier HSDPA HARQ buffer allocation method, system and terminal

technical field

The present invention relates to the field of mobile communication, in particular to a multi-carrier high-speed downlink packet access (HSDPA) hybrid automatic repeat (HARQ) cache allocation method, system and terminal.

Background technique

The reliability of data transmission is realized through retransmission. When the previous transmission attempt fails, the data packet is required to be retransmitted. Such a transmission mechanism is Automatic Repeat-reQuest (ARQ).

In the wireless transmission environment, channel noise and fading due to mobility and interference from other users make channel transmission quality very poor, so data packets should be protected to suppress various interferences. This kind of protection mainly uses Forward Error Correction Coding (FEC, Forward Error Correction) to transmit extra bits in the packet. However, too much FEC will reduce transmission efficiency, so a solution combining ARQ and FEC is proposed, that is, Hybrid Automatic Repeat Request (HARQ, Hybrid Automatic Repeat Request). HARQ technology can well compensate the influence of wireless mobile channel time-varying and multipath fading on signal transmission, and has become one of the indispensable key technologies in the future 3G long-term evolution system.

The HARQ entity is responsible for processing the Medium Access Control (MAC, Medium Access Control) function related to the HARQ protocol. The HARQ entity handles all tasks required by hybrid ARQ, and it is responsible for generating ACK and NACK. The detailed configuration of the hybrid ARQ protocol is provided by Radio Resource Control (RRC, Radio Resource Control) through MAC control Service Access Point (SAP, Service Access Point). The HARQ process identification is carried in the high-speed downlink shared control channel (HS-SCCH, High-Speed Downlink Shared Control Channel), which indicates which HARQ process is processed by the subsequently received high-speed downlink shared channel (HS-DSCH, High-Speed Downlink Shared Channel) .

The HARQ buffer (buffer) can be allocated explicitly or implicitly and marked by the number of buffers and the process number. The explicit (explicit) allocation is to bind the buffer to the HARQ process number, while the implicit (implicit) allocation only indicates HARQ The process number, when used, the total cache is evenly distributed among the various HARQ processes. The Node B (NodeB) notifies the Radio Network Controller (RNC, Radio Network Controller) after allocating the HARQ buffer, and the RNC notifies the user equipment (UE) of the allocation method and allocation result of the HARQ buffer through an RRC message. The NodeB allocates the HARQ cache according to the high-speed downlink packet access (HSDPA, High Speed Downlink Packet Access) capability reported by the UE. During specific scheduling, the HARQ cache is determined by carrying the HARQ process number on the HS-SCCH to the UE.

In a multi-carrier HSDPA cell, a UE has one HARQ sub-entity on each carrier configured with HS-DSCH, and the HARQ sub-entity of each receiving carrier includes multiple HARQ processes. The downlink control channel HS-SCCH carries the HARQ process number, which indicates which HARQ process is used to process the HS-DSCH of a certain carrier received subsequently. The uplink and downlink signaling control channel controlling a carrier is allocated on the same carrier. The command carries information supporting HS-DSCH.

At present, the prior art does not provide the allocation of multi-carrier HSDPA HARQ buffers. The capability of each carrier of multi-carrier HSDPA depends on the capability of single-carrier HSDPA. If each carrier of multi-carrier HSDPA is regarded as a single-carrier HSDPA, the HARQ buffer of each carrier is allocated according to the capability of single-carrier HSDPA. For example, for HARQ For a UE with a buffer of 1M, if carrier 1 specifies a 400K HARQ buffer through an explicit allocation method, and carrier 2 corresponds to an implicit allocation method, if carrier 2 is regarded as a single-carrier HSDPA, and the single-carrier HSDPA capability is used to When HARQ buffering is performed, the HARQ buffer size of carrier 2 is 1M, so that the sum of the buffer numbers of the two carriers (1.4M) exceeds the actual buffer size (1M) of the UE. In this way, the UE HARQ buffering capability configured on the network side does not match the actual HARQ buffering capability of the UE, resulting in the UE being unable to receive all data delivered by the network side.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a multi-carrier HSDPA HARQ buffer allocation method, system and terminal to solve the problem that the UE HARQ buffer capacity allocated by the network side does not match the actual HARQ buffer capacity of the UE.

In order to achieve the above object, the technical solution of the present invention is achieved in this way,

The present invention provides a multi-carrier High Speed Downlink Packet Access (HSDPA) Hybrid Automatic Repeat (HARQ) cache allocation method, the method comprising:

The network side configures the HARQ cache for each carrier of the UE in an explicit allocation mode or an implicit allocation mode;

According to the result of the configuration on the network side, for the carrier corresponding to the explicit allocation mode, the user equipment (UE) divides the corresponding HARQ buffer into each HARQ process of the carrier; for the carrier corresponding to the implicit allocation mode, the UE The remaining HARQ buffers in the total HARQ buffers after the HARQ buffers allocated in an explicit allocation manner are evenly allocated to each HARQ process of the carrier.

Wherein, before the network side configures the HARQ cache for each carrier of the UE in an explicit allocation mode or an implicit allocation mode; the method further includes: the UE transmits a radio resource control (RRC) connection establishment request message to the network side The radio network controller (RNC) reports the multi-carrier HSDPA capability and the total HARQ buffer size.

The method further includes: the RNC notifies the Node B (NodeB) on the network side of the multi-carrier HSDPA capability and the total HARQ buffer size reported by the UE through a radio link establishment request message.

According to the multi-carrier HSDPA capability reported by the UE and the total HARQ buffer size of the UE, the NodeB configures the HARQ buffer for each carrier of the UE in an explicit allocation mode or an implicit allocation mode, and transmits the configuration result through the wireless link The establishment response message is notified to the RNC.

The method further includes: the RNC sends the configuration result to the UE through an RRC connection establishment response message.

The present invention also provides a multi-carrier HSDPA HARQ cache allocation system, characterized in that it includes: a network side and a UE; wherein:

The network side is configured to configure a HARQ buffer for each carrier of the UE in an explicit allocation mode or an implicit allocation mode;

The UE is configured to, for the carrier corresponding to the explicit allocation mode, divide the corresponding HARQ buffer into each HARQ process of the carrier according to the configuration result of the network side; for the carrier corresponding to the implicit allocation mode, After subtracting the HARQ buffer allocated by the explicit allocation mode from the total HARQ buffer, it is evenly allocated to each HARQ process of the carrier.

Wherein, the network side includes: RNC and NodeB,

Correspondingly, the UE is further configured to report the multi-carrier HSDPA capability and the total HARQ buffer size to the RNC through an RRC connection establishment request message;

The RNC is configured to notify the NodeB of the multi-carrier HSDPA capability and the total HARQ buffer size reported by the UE through a radio link establishment request message;

The NodeB is configured to configure the HARQ cache for each carrier of the UE in an explicit or implicit allocation manner according to the multi-carrier HSDPA capability reported by the UE and the total HARQ buffer size of the UE, and pass the configuration result through The radio link establishment response message is notified to the RNC.

The RNC is further configured to send the configuration result from the NodeB to the UE through an RRC connection establishment response message.

The present invention also provides a terminal for realizing multi-carrier HSDPA HARQ buffer allocation, including: an information acquisition module and an allocation module, wherein:

The information obtaining module is used to obtain the result of HARQ cache configuration;

The allocation module is configured to divide the corresponding HARQ buffer into each HARQ process of the carrier for the carrier corresponding to the explicit allocation mode according to the result of the HARQ buffer configuration; for the carrier corresponding to the implicit allocation mode , evenly distribute the remaining HARQ buffers in the total HARQ buffers of the terminal after removing the HARQ buffers allocated in an explicit allocation manner to each HARQ process of the carrier.

The information obtaining module is further configured to receive an RRC connection establishment response message, and obtain the HARQ buffer configuration result from the RRC connection establishment response message;

Correspondingly, the terminal further includes: an information sending module, configured to send an RRC connection establishment request message, and report the multi-carrier HSDPA capability of the terminal required to perform the HARQ buffer configuration and the overall HARQ buffer size.

The allocation method, system and terminal of the multi-carrier HSDPA HARQ buffer of the present invention, the network side adopts the explicit allocation mode or the implicit allocation mode to configure the HARQ buffer for each carrier of the UE; according to the configuration result, for the carrier corresponding to the explicit allocation mode, The UE divides the corresponding HARQ buffers to each HARQ process of the carrier; for the carrier corresponding to the implicit allocation method, the UE allocates the remaining HARQ buffers in the total HARQ buffer after removing the HARQ buffers allocated by the explicit allocation method to the carriers. Each HARQ process. According to the HARQ buffer allocation performed by the UE, it can be seen that the sum of the HARQ buffer configured by the network side for each carrier is equal to the total HARQ buffer of the UE (that is, the actual HARQ buffer of the UE), which is in line with the UE HARQ buffer capability and avoids the network-side configured HARQ buffer. The UE cannot receive all the data sent by the network side due to the discrepancy between the UE HARQ buffer capability and the UE's actual HARQ buffer capability.

Description of drawings

Fig. 1 is the flow chart of multi-carrier HSDPA HARQ cache allocation method of the present invention;

FIG. 2 is a schematic diagram of a multi-carrier HSDPA HARQ buffer allocation process in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the result of multi-carrier HSDPAHARQ buffer allocation in Example 1 of the present invention;

FIG. 4 is a schematic diagram of a multi-carrier HSDPA HARQ buffer allocation process in Embodiment 2 of the present invention;

FIG. 5 is a schematic diagram of the result of multi-carrier HSDPAHARQ buffer allocation in Example 2 of the present invention;

FIG. 6 is a structural diagram of a terminal implementing multi-carrier HSDPA HARQ buffer allocation according to the present invention.

detailed description

The core idea of multi-carrier HSDPA HARQ buffer allocation in the present invention is: the allocation of each carrier HSDPA HARQ buffer in multi-carrier HSDPA can adopt different allocation modes (explicit allocation mode or implicit allocation mode), and the multi-carrier HSDPA of network side configuration The sum of the HARQ buffers cannot exceed the total HARQ buffer size of the UE.

The explicit allocation means that the network side indicates the HARQ buffer size corresponding to each HARQ process for each carrier; the implicit allocation means that the network side indicates the number of HARQ processes for each carrier.

As shown in Figure 1, the allocation method of multi-carrier HSDPA HARQ cache of the present invention comprises:

In step 101, the network side configures a HARQ cache for each carrier of the UE in an explicit allocation manner or an implicit allocation manner.

Step 102, according to the configuration result of the network side, for the carrier corresponding to the explicit allocation mode, the UE divides the corresponding HARQ buffer into each HARQ process of the carrier; for the carrier corresponding to the implicit allocation mode, the UE removes the corresponding HARQ buffer from the total HARQ buffer The remaining HARQ buffer after the HARQ buffer allocated in the explicit allocation manner is evenly allocated to each HARQ process of the carrier.

Wherein, the network side includes RNC and NodeB.

The technical solutions of the present invention are illustrated below through specific examples.

Implementation example one

As shown in Figure 2, when the HARQ buffer of two-carrier HSDPA adopts the explicit allocation method and the implicit allocation method, the allocation process of the HARQ buffer includes:

Step 201: The UE reports the multi-carrier HSDPA capability of the UE and the total HARQ buffer size to the RNC through an RRC connection establishment request message.

In this implementation example, the UE reports the two-carrier HSDPA capability, and the total HARQ buffer size of the UE is 1 MB.

Step 202: The RNC notifies the NodeB of the two-carrier HSDPA capability reported by the UE and the UE's total HARQ buffer size of 1MB through a radio link establishment request message.

Step 203: After obtaining the two-carrier HSDPA capability of the UE, the NodeB performs HARQ buffer configuration for the two-carrier HSDPA, and notifies the RNC of the configuration result through a radio link establishment response message.

According to the two-carrier HSDPA capability of the UE, the NodeB can set an explicit allocation method for one carrier (carrier 1) in the two-carrier HSDPA, and an implicit allocation method for the other carrier (carrier 2).

Assume that the total HARQ buffer size of the UE is 1MB, and the HARQ buffer address is 0-999. The configuration result is: NodeB can specify the HARQ buffer size corresponding to each HARQ process of carrier 1 according to the explicit allocation method (usually a carrier has four HARQ buffers). process, the network side can specify HARQ caches of equal size for these four HARQ processes, of course, they can also be unequal), assuming that the HARQ caches specified for each HARQ process of carrier 1 are cache addresses 0-399; carrier 2, the NodeB indicates to the UE the number of HARQ processes included in each carrier.

Step 204: The RNC notifies the UE of the result configured in step 203 through an RRC connection establishment response message.

Step 205: The UE allocates a corresponding HARQ buffer for the HARQ process of each carrier in the two-carrier HSDPA according to the configuration result, including:

According to the result of the configuration on the network side, the UE divides the HARQ buffer with addresses 0 to 399 in the 1MB HARQ buffer to each HARQ process of carrier 1 (according to the configuration result, it can be divided evenly or unevenly) ; Remove the HARQ buffer allocated to carrier 1, and evenly distribute the remaining HARQ buffer to each HARQ process of carrier 2 (the number of HARQ processes of carrier 2 is specified by the network side, which can be known from the configuration result), and the allocation result is shown in Figure 3 .

If the UE has the three-carrier HSDPA capability, after the corresponding HARQ buffer is divided into each HARQ process of carrier 1 according to the explicit allocation method, the remaining HARQ buffer is evenly allocated to the respective HARQ processes of carrier 2 and carrier 3 using the implicit allocation method. HARQ process.

Implementation example two

As shown in Figure 4, when the HARQ buffers of the two-carrier HSDPA adopt the implicit allocation method, the allocation process of the HARQ buffer includes:

Step 401: The UE reports the multi-carrier HSDPA capability of the UE and the total HARQ buffer size to the RNC through an RRC connection establishment request message.

In this implementation example, the UE reports the two-carrier HSDPA capability, and the total HARQ buffer size of the UE is 1 MB.

Step 402: The RNC notifies the NodeB of the two-carrier HSDPA capability reported by the UE and the total HARQ buffer size of the UE of 1MB through a radio link establishment request message.

Step 403: After obtaining the two-carrier HSDPA capability of the UE, the NodeB performs HARQ buffer configuration for the two-carrier HSDPA, and notifies the RNC of the configuration result through a radio link establishment response message.

According to the two-carrier HSDPA capability of the UE, the NodeB can set the implicit allocation method for both carriers in the two-carrier HSDPA.

Assume that the total HARQ buffer size of the UE is 1MB, and the HARQ buffer address is 0-999. The configuration result is as follows: According to the implicit allocation method of both carriers, the NodeB specifies the number of HARQ processes contained in carrier 1 and carrier 2 for the UE. number.

Step 404: The RNC notifies the UE of the result configured in step 403 through an RRC connection establishment response message.

Step 405: The UE allocates a corresponding HARQ buffer for the HARQ process of each carrier in the two-carrier HSDPA according to the configuration result, including:

According to the configuration result on the network side, the UE evenly distributes the HARQ buffer of 1M MB to each HARQ process of carrier 1 and carrier 2, for example: the UE distributes the HARQ buffer of address 0-499 evenly to each HARQ process of carrier 1; The HARQ buffers of 500-999 are evenly allocated to each HARQ process of carrier 2, and the allocation result is shown in FIG. 5 .

In order to realize the allocation method of the above-mentioned HARQ cache, the present invention also provides an allocation system including: a network side and a UE; wherein:

The network side is configured to configure the HARQ cache for each carrier of the UE in an explicit allocation mode or an implicit allocation mode;

The UE is used to divide the corresponding HARQ buffer to each HARQ process of the carrier for the carrier corresponding to the explicit allocation mode according to the configuration result of the network side; for the carrier corresponding to the implicit allocation mode, the total HARQ buffer is subtracted The HARQ buffer allocated in the explicit allocation mode is evenly allocated to each HARQ process of the carrier.

The network side includes: RNC and NodeB.

Correspondingly, the UE is also used to report the multi-carrier HSDPA capability and the total HARQ buffer size to the RNC through the RRC connection establishment request message;

The RNC is configured to notify the NodeB of the multi-carrier HSDPA capability reported by the UE and the total HARQ buffer size through a radio link establishment request message;

NodeB is used to configure the HARQ buffer for each carrier of the UE in the explicit allocation method or the implicit allocation method according to the multi-carrier HSDPA capability reported by the UE and the total HARQ buffer size of the UE, and then establish the configuration result through the wireless link The response message is notified to RNC.

The RNC is also used to send the configuration result from the NodeB to the UE through the RRC connection establishment response message.

The present invention also provides a terminal suitable for the above distribution method and distribution system, as shown in Figure 6, including: an information acquisition module and a distribution module, wherein:

An information acquisition module, configured to acquire the result of the HARQ cache configuration;

The allocation module is configured to divide the corresponding HARQ buffer into each HARQ process of the carrier for the carrier corresponding to the explicit allocation mode according to the result of the HARQ buffer configuration; for the carrier corresponding to the implicit allocation mode, allocate The remaining HARQ buffers after excluding the HARQ buffers allocated in an explicit allocation manner are evenly allocated to each HARQ process of the carrier.

Wherein, the information obtaining module is further used to receive the RRC connection establishment response message, and obtain the result of the HARQ cache configuration from the RRC connection establishment response message;

Correspondingly, the terminal further includes: an information sending module, configured to send an RRC connection establishment request message, and report the terminal's multi-carrier HSDPA capability and total HARQ buffer size required for HARQ buffer configuration through the RRC connection establishment request message.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. a kind of multi-carrier high-speed downlink packet access (HSDPA) hybrid automatic retransmission (HARQ) buffer allocation method, it is characterized in that, the method comprises: The network side configures the HARQ cache for each carrier of the user equipment (UE) in an explicit allocation mode or an implicit allocation mode; the network side adopts explicit allocation means that the network side indicates for each carrier the HARQ buffer corresponding to each HARQ process. Buffer size, the implicit allocation by the network side means that the network side indicates the number of HARQ processes for each carrier; According to the result of the configuration on the network side, for the carrier corresponding to the explicit allocation mode, the UE divides the corresponding HARQ buffer into each HARQ process of the carrier; for the carrier corresponding to the implicit allocation mode, the UE allocates the total HARQ buffer The remaining HARQ buffers in the buffers after the HARQ buffers allocated in an explicit allocation manner are evenly allocated to each HARQ process of the carrier. 2. according to the allocation method of multi-carrier HSDPA HARQ cache according to claim 1, it is characterized in that, before described network side adopts explicit allocation mode or implicit allocation mode to configure HARQ cache for each carrier of UE; The method further comprises : The UE reports the multi-carrier HSDPA capability and the total HARQ buffer size to a radio network controller (RNC) on the network side through a radio resource control (RRC) connection establishment request message. 3. The method for allocating the multi-carrier HSDPA HARQ cache according to claim 2, wherein the method further comprises: the multi-carrier HSDPA capability and the total HARQ capability reported by the UE by the RNC through a radio link establishment request message The buffer size is notified to the Node B (NodeB) on the network side. 4. The method for allocating the multi-carrier HSDPA HARQ buffer according to claim 3, wherein the NodeB adopts an explicit allocation method or an implicit allocation method according to the multi-carrier HSDPA capability reported by the UE and the total HARQ buffer size of the UE. The allocation method is to configure the HARQ cache for each carrier of the UE, and notify the RNC of the configuration result through a radio link establishment response message. 5. The method for allocating the multi-carrier HSDPA HARQ cache according to claim 4, further comprising: the RNC sending the configuration result to the UE through an RRC connection establishment response message. 6. A system for allocating multi-carrier HSDPA HARQ buffers, comprising: a network side and a UE; wherein: The network side is configured to configure the HARQ buffer for each carrier of the UE in an explicit allocation mode or an implicit allocation mode; the network side adopts explicit allocation means that the network side indicates for each carrier the HARQ process corresponding to each carrier The size of the HARQ buffer, the network side using implicit allocation means that the network side indicates the number of HARQ processes for each carrier; The UE is configured to, for the carrier corresponding to the explicit allocation mode, divide the corresponding HARQ buffer into each HARQ process of the carrier according to the configuration result of the network side; for the carrier corresponding to the implicit allocation mode, After subtracting the HARQ buffer allocated by the explicit allocation mode from the total HARQ buffer, it is evenly allocated to each HARQ process of the carrier. 7. the distribution system of multi-carrier HSDPA HARQ cache according to claim 6, is characterized in that, described network side comprises: RNC and NodeB, Correspondingly, the UE is further configured to report the multi-carrier HSDPA capability and the total HARQ buffer size to the RNC through an RRC connection establishment request message; The RNC is configured to notify the NodeB of the multi-carrier HSDPA capability and the total HARQ buffer size reported by the UE through a radio link establishment request message; The NodeB is configured to configure the HARQ cache for each carrier of the UE in an explicit or implicit allocation manner according to the multi-carrier HSDPA capability reported by the UE and the total HARQ buffer size of the UE, and pass the configuration result through The radio link establishment response message is notified to the RNC. 8. The multi-carrier HSDPA HARQ cache allocation system according to claim 7, wherein the RNC is further configured to send the configuration result from the NodeB to the UE through an RRC connection establishment response message. 9. A terminal for realizing multi-carrier HSDPA HARQ buffer allocation, characterized in that, comprising: an information acquisition module and an allocation module, wherein: The information acquisition module is configured to acquire the HARQ cache result configured by the network side in an explicit allocation mode or an implicit allocation mode; the network side adopts explicit allocation means that the network side indicates for each carrier the corresponding HARQ process The size of the HARQ buffer, the network side using implicit allocation means that the network side indicates the number of HARQ processes for each carrier; The allocation module is configured to divide the corresponding HARQ buffer into each HARQ process of the carrier for the carrier corresponding to the explicit allocation mode according to the result of the HARQ buffer configuration; for the carrier corresponding to the implicit allocation mode , evenly distribute the remaining HARQ buffers in the total HARQ buffers of the terminal after removing the HARQ buffers allocated in an explicit allocation manner to each HARQ process of the carrier. 10. The terminal realizing multi-carrier HSDPA HARQ cache allocation according to claim 9, wherein the information acquisition module is further configured to receive an RRC connection establishment response message, and obtain the information obtained from the RRC connection establishment response message. The results of the HARQ cache configuration described above; Correspondingly, the terminal further includes: an information sending module, configured to send an RRC connection establishment request message, and report the multi-carrier HSDPA capability of the terminal required to perform the HARQ buffer configuration and the overall HARQ buffer size.