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CN101753282B - Process cache configuration and processing method and system thereof - Google Patents

Process cache configuration and processing method and system thereof Download PDF

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Publication number
CN101753282B
CN101753282B CN200810240496.4A CN200810240496A CN101753282B CN 101753282 B CN101753282 B CN 101753282B CN 200810240496 A CN200810240496 A CN 200810240496A CN 101753282 B CN101753282 B CN 101753282B
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cache
scch less
less operation
base station
user equipment
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CN101753282A (en
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刘亚伟
李晓卡
贾民丽
邢艳萍
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to KR1020117017306A priority patent/KR101274597B1/en
Priority to PCT/CN2009/075835 priority patent/WO2010072143A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a process cache configuration and processing method, comprising the following steps: after a downlink semi-persistent scheduling (HS-SCCH Less) operation is started by a base station and user equipment, according to a predefined method of reserving cache or a cache indicating message at the network side, the cache which is needed by the HS-SCCH Less operation is reserved; the cache which is reserved for the HS-SCCH Less operation is allocated to the HS-SCCH Less operation, and a high speed downlink packages access (HSDPA) process of the user equipment is limited to use a cache except the reserved cache. The invention further discloses a system for realizing the process cache configuration and processing method. The problem of the needed UE cache in the HS-SCCH Less operation is solved under the situation that the user equipment complexity is not increased.

Description

Method and system for configuring and processing process cache
Technical Field
The invention relates to the technical field of wireless communication, in particular to a method and a system for configuring and processing a process cache in downlink semi-persistent scheduling (HS-SCCH Less) operation.
Background
At present, a Low Chip Rate Time Division Duplex (LCR TDD) system develops a related study on Continuous Packet Connectivity (CPC), and aims to improve Packet user capacity, reduce power consumption of User Equipment (UE), prolong the service Time of a UE battery as much as possible, optimize and support Packet voice (VoIP) services, increase VoIP user capacity and the like without reducing throughput performance of a cell. In order to optimize the support of services with high requirements on small data packets and time delay represented by VoIP services and reduce the overhead of a Control Channel, for a downlink transmission scheme of the VoIP services (also referred to as downlink semi-persistent scheduling, downlink SPS scheduling, HS-SCCH Less operation, or the like, hereinafter referred to as HS-SCCH Less operation), a base station (NodeB) allocates semi-persistent physical resources to a UE through a Control Channel, where the Control Channel is a Shared Control Channel for a high-speed downlink Shared Channel (HS-DSCH, HS-SCCH), and the UE performs transmission of the VoIP services within a resource authorization range.
In order to support HS-SCCH Less operation, the UE needs to store data to be retransmitted and combined, or needs to additionally increase the number of Hybrid Automatic Repeat reQuest (HARQ) processes to support the HARQ function, and the implementation of the above functions all needs to additionally increase a certain number of caches, which increases the complexity of UE implementation and correspondingly increases the cost.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and a system for configuring and processing a process cache in HS-SCCH Less operation, which can solve the problem of UE cache required in HS-SCCH Less operation without increasing UE complexity.
The method comprises the following steps:
after starting HS-SCCH Less operation, the base station and the user equipment reserve the required cache for the HS-SCCH Less operation according to a predefined cache reservation mode or according to cache indication information of network side equipment;
and distributing the cache required by the reserved HS-SCCH Less operation to the HS-SCCH Less operation.
The system comprises a wireless network controller, a base station and user equipment;
the wireless network controller is used for sending a message carrying the configuration information cached by HS-SCCH Less operation to the base station; receiving a response message from the base station, and sending a message carrying cached configuration information which can be occupied by HS-SCCH Less operation to the user equipment;
the base station is used for reserving a cache required by HS-SCCH Less operation in the cache of the user equipment according to the received message and returning a response message to the wireless network controller;
and the user equipment is used for distributing the reserved cache required by the HS-SCCH Less operation to the HS-SCCH Less operation according to the received message and limiting the HSDPA process of the user equipment to use the cache except the reserved cache.
According to the technical scheme, the cache required by the HS-SCCH Less operation is reserved in the cache of the user equipment, so that the reserved cache required by the HS-SCCH Less operation is further distributed to an HS-SCCH Less operation process, and the high-speed downlink packet access HSDPA process of the user equipment is limited to use the cache except the reserved cache, so that the problem of UE cache required by the HS-SCCH Less operation can be solved under the condition of not improving the complexity of the UE.
Drawings
Fig. 1 is a signaling interaction flow chart according to a first embodiment of the present invention;
fig. 2 is a signaling interaction flow chart according to a second embodiment of the present invention;
Detailed Description
The key of the technical scheme of the invention is that the reservation is carried out from a cache required by the existing High Speed Downlink Packet Access (HSDPA) process of the UE, the existing HSDPA is limited to use only a part of the original cache, and the vacant cache is utilized to support HS-SCCH Less operation, thereby achieving the purpose of not additionally increasing the buffer storage of the UE.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
The following describes a case where an RNC configures a UE to add HS-SCCH Less operation and reserve a buffer for the HS-SCCH Less operation. The messages listed in this description are not limited to the ones given in the examples.
Example one
The RNC firstly informs the NodeB of the cache size required by HS-SCCH Less operation, the NodeB performs corresponding cache reservation operation, and informs the RNC of cache allocation information. Then the RNC or NodeB informs the UE of the cache allocation information, the UE allocates the reserved cache required by the HS-SCCH Less operation to the HS-SCCH Less operation according to the relevant parameters, and limits the HSDPA process to use the cache except the reserved cache. Fig. 1 shows an implementation flow of an embodiment, which includes the following steps:
step 101: the RNC sends the message to NodeB through Iur/Iub interface to carry the configuration information of HS-SCCH Less operation required buffer, the message is wireless link establishment message or wireless link reconfiguration message.
The configuration information cached by the HS-SCCH Less operation carried in the radio link reconfiguration message is divided into the following conditions:
case 1, cache requirement C for HS-SCCH Less operation as configuration informationLess。
Configuration information is caching requirement C of HS-SCCH Less operationLess. After NodeB receives the configuration information, the NodeB sends CLessConverting with the cache required by the existing HSDPA process, if the maximum cache supported by the UE is C and the maximum number of processes is N, the cache used by each process is C/N, namely the cache requirement of HS-SCCH Less operation is equivalent to that of the existing HSDPAThe cache requirements of the individual processes.
Case 2, the configuration information is that the caching requirement of HS-SCCH Less operation is equivalent to the process number of the existing HSDPA.
The RNC makes the buffering requirement C of HS-SCCH Less operation according to the method in the case 1LessConverting with the cache needed by the existing HSDPA process, and taking the cache quantity, namely the parameter L, which needs to be reserved for HS-SCCH Less operation as the configuration information to be carried in the message, wherein the message is reconfigured by a wireless link.
Case 3, predefined manner of reserving a cache.
The buffer size required for supporting HS-SCCH Less operation is predefined to be C by RNC and NodeBLessThe RNC informs the NodeB of needing to reserve a cache for the HS-SCCH Less by adding indication information in the message, wherein the configuration information is an indication field with 1 bit; the node B knows the buffer amount required by the HS-SCCH Less operation according to the pre-defined information.
Step 102: and after receiving the message, the NodeB performs the reserved operation of the cache required by the HS-SCCH Less operation and returns a response message to the RNC. The feedback message carries cache allocation information used for representing the cache required by the HS-SCCHLess operation. The response message may be a radio link setup/reconfiguration response message.
The reserving operation of the cache required by the HS-SCCH Less operation comprises the following steps:
the NodeB judges whether the current unoccupied cache of the UE is larger than or equal to the cache requirement of the HS-SCCH Less operation indicated in the received configuration information, if so, the NodeB reserves the available cache size C of the HS-SCCH Less operation in the unoccupied cacheLess′(≥CLess) The NodeB sends a response message to the RNC, otherwise, the NodeB releases some processes according to a certain rule to meet the requirement that the HS-SCCH Less operation needs L process caches, and reserves the available cache size C of the HS-SCCH Less operation in the unoccupied cachesLess′(≥CLess) And sends a response message to the RNC.
The release process rule adopted by the NodeB may be any one of the following:
1) randomly selecting among the occupied processes; or
2) According to the priority sequence of the data stored in the occupied process, the process with the lowest priority is released; or
3) Sequencing according to the duration of the occupied processes, and starting to release from the process with the longest occupied time; or
4) And when the UE configures a multiple input and output (MIMO) mode, the NodeB releases the occupied processes in pairs, namely the processes are used in pairs during MIMO dual-stream transmission. For example, in the prior art, the process identifiers are HAP _ ID and (HAP _ ID + N)proc/2)mod(Nproc) The processes of (a) are used in pairs during dual stream transmission, NprocIs the total number of processes of the higher level configuration, NprocWhen the procedure id is 16, for example, the procedure id is 0 and the procedure id is 8, in this manner, the NodeB releases the procedure id is 0, and also needs to release the procedure id is 8 at the same time.
The cache allocation information includes any combination of the following parameters: buffer size C available for HS-SCCH Less operationLess′(≥CLess) UE existing cache size C-C available for HSDPALess', the number of processes available for the existing HSDPA of the UE, such as N or (N-L), the buffer size of each configured HSDPA process, and the buffer requirement for HS-SCCH Less operation is equivalent to the number L of processes of the existing HSDPA. If the NodeB releases at least one process, the buffer allocation information also needs to include the released process identity.
The response message may also include default cache allocation information or an indication field containing only 1bit, indicating that the default NodeB has successfully configured the required cache size C for HS-SCCH Less operationLessThat is, the default UE uses N-L processes in the existing HSDPA, and the buffer size is C-CLessN-L processes share these caches.
Aiming at different conditions of step 101, the NodeB knows the caching requirement C of HS-SCCH Less operationLessThe following describes the cache allocation information:
case 1: if the buffers are evenly distributed among the processes, the NodeB according to CLessThe process number L of the HSDPA required by HS-SCCH Less operation can be calculated, and the available cache size C-C of the HSDPA can be calculatedLessAnd/or the parameter L and/or the number of processes (N-L) available for HSDPA and/or the required buffer size per process as buffer allocation information to the RNC.
Case 2: if the cache is not evenly distributed among all processes, the NodeB can not convert the cache requirement of HS-SCCHLess operation into the process number L, and the NodeB directly reserves the available cache size C of HS-SCCH Less operation in the unoccupied cacheLess′(≥CLess) And the buffer size C available for HS-SCCH Less operationLess′(≥CLess) And/or UE existing HSDPA available buffer size C-CLess' and/or the number of processes available for HSDPA and/or the size of the buffer required for each process is notified to the RNC as buffer allocation information.
Case 3: in addition to the above-described cache allocation information, if cache demand CLessGreater than empty for the UEAnd caching, the NodeB releases at least one process according to the rule, and the cache allocation information further comprises a released process identifier.
Step 103: and the RNC sends a Radio Resource Control (RRC) message to the UE through the Uu interface, wherein the RRC message carries the cache allocation information.
The method needs to guarantee in advance that the size of the cache or the number of processes used by the NodeB and the UE for HSDPA and HS-SCCH Less operations are consistent. The RRC message may be, for example, an RRC connection setup message, a Radio bearer (Radio bearer) setup message, an RB reconfiguration message, or a transport channel reconfiguration message.
In addition, the NodeB may also include the buffer allocation information UE on the Uu interface in a physical layer control Channel manner, for example, the buffer allocation information UE is included in a new control Channel format, where the control Channel is, for example, an HS-SCCH or an Enhanced Dedicated Channel (E-DCH) Absolute Grant Channel (E-DCH).
Step 104: the UE carries out cache configuration according to the received cache allocation information, namely, the cache reserved for HS-SCCH Less operation is allocated to the HS-SCCH Less operation, and the HSDPA process is limited to use the cache except the reserved cache; and sends an RRC response message to the RNC.
According to different cache allocation information, the following description is given to the allocation of the cache reserved for HS-SCCH Less operation to the HS-SCCH Less operation:
1) the cache allocation information is a parameter L and/or a parameter (N-L):
the cache reserved for HS-SCCH Less operation is allocated to the HS-SCCH Less operation as follows: distributing the caches of the L processes to HS-SCCH Less operation;
2) the cache allocation information is available cache size C for HS-SCCH Less operationLess′(≥CLess) And/or UE existing HSDPA available buffer size C-CLess′：
Reserved for HS-The cache of the SCCH Less operation is distributed to the HS-SCCH Less operation as follows: will have a size of CLess' the buffer is allocated to HS-SCCH Less operation.
3) Default cache allocation information;
the cache reserved for HS-SCCH Less operation is allocated to the HS-SCCH Less operation as follows: and allocating a free buffer with a preset size to HS-SCCH Less operation.
If the RRC message received by the UE also carries a process identifier which needs to release the cache or a process identifier used by the HSDPA; before the UE performs the buffer configuration, the method further includes the following steps: and the UE releases the process corresponding to the process identification needing to release the cache.
After the UE completes the configuration of the cache used by the HS-SCCH Less operation, if the service related to the HS-SCCHLess operation, such as VoIP service, is stopped, the RNC configures the UE to delete the HS-SCCH Less operation and release the cache occupied by the HS-SCCH Less operation. The following describes the situation that the UE releases the occupied cache of HS-SCCH Less operation through the configuration of two RNC pairs in the embodiment.
Example a process is shown in figure 2.
Step 201: the RNC carries the instruction information for releasing the cache occupied by HS-SCCH Less operation in the message sent to the NodeB through an Iur/Iub interface, wherein the message is the wireless link deleting/reconfiguring message.
The RNC adds indication information, such as 1bit indication, in the message of the Iur/Iub interface and informs the NodeB to release the cache occupied by HS-SCCHLess operation.
Step 202: and after receiving the message, the NodeB returns a response message to the RNC, wherein the response message comprises a wireless link deleting/reconfiguring message.
The NodeB may or may not carry feedback information in the response message, where the feedback information indicates, for example, a 1bit indication, that the NodeB has successfully released the cache occupied by the HS-SCCH Less operation, and if not, the RNC defaults that the NodeB has successfully released the cache occupied by the HS-SCCH Less operation. The successful release of the caches occupied by the HS-SCCH Less operation means that the released caches are used by the existing HSDPA again.
After receiving the message, the NodeB releases the cache occupied by the HS-SCCH Less operation, and carries the reconfiguration information of the released cache in the feedback message to the RNC, wherein the reconfiguration information is as follows:
1) which processes the freed cache is assigned to, the ID of those processes, and/or
2) The processes may each have their own allocated buffer size, such as an evenly distributed released buffer, or each process may be allocated separately.
When a synchronous reconfiguration mode is adopted, the NodeB preferentially uses the cache occupied by the non-HS-SCCH Less operation before the activation time point, namely before the reconfiguration process of the synchronous wireless link takes effect.
Step 203: and the RNC sends an RRC message carrying the indication information for releasing the cache occupied by the HS-SCCH Less operation to the UE through a Uu interface.
Possible schemes on the Uu interface are listed as follows, the RRC message includes Radio Bearer (RB) release, RB reconfiguration, transport channel reconfiguration message, and the like, and the indication information includes an indication of 1 bit. The messages are not limited to only the ones listed above.
And the RNC adds indication information in the RRC message and informs the UE to release the cache occupied by the HS-SCCH Less operation, wherein the indication information is the indication of 1 bit.
The RNC may further notify the UE of the released cached reconfiguration information in an RRC message, where the reconfiguration information is as follows:
1) which processes the released cache is allocated to, identification of those processes, and/or
2) The processes may each have their own allocated buffer size, such as an evenly distributed released buffer, or each process may be allocated separately.
In addition, the NodeB may also notify the UE of the indication information for releasing the cache occupied by the HS-SCCH Less operation by using a physical layer control channel on the Uu interface, for example, the indication information is included in a new control channel format, and the control channel is, for example, an HS-SCCH or an E-AGCH.
Step 204: and after receiving the RRC message, the UE completes the release operation according to the indication information and returns an RRC response message to the RNC.
In addition, the RNC firstly resets (Reset) the MAC-HS entities of the NodeB and the UE through signaling of the Iur/Iub and Uu interfaces, respectively, and then configures or releases the HS-SCCH Less operation buffer according to the first and second embodiments.
As can be seen from the above embodiments, the system for implementing the method of the embodiments of the present invention includes a radio network controller, a base station and a user equipment,
the wireless network controller is used for sending a message carrying the configuration information cached by HS-SCCH Less operation to the base station; receiving a response message from the base station, and sending a message carrying cached configuration information which can be occupied by HS-SCCH Less operation to the user equipment;
the base station is used for reserving a cache required by HS-SCCH Less operation in the cache of the user equipment according to the received message and returning a response message to the wireless network controller;
and the user equipment is used for distributing the reserved cache required by the HS-SCCH Less operation to the HS-SCCH Less operation according to the received message and limiting the HSDPA process of the user equipment to use the cache except the reserved cache.
Optionally, the base station may further include:
the judging unit is used for judging whether the current unoccupied cache of the user equipment is larger than or equal to the cache required by the HS-SCCH Less operation indicated in the message, and if not, the releasing unit is informed to release the process;
the release unit is used for releasing the process according to a preset rule to meet the caching requirement of HS-SCCH Less operation;
and the reservation unit is used for reserving the cache which can be occupied by the HS-SCCH Less operation in the cache which is not occupied currently by the user equipment.
The radio network controller includes:
the conversion unit is used for converting the cache requirement of HS-SCCH Less operation with the cache required by the prior HSDPA process;
and the notification unit is used for notifying the base station and the user equipment of the caching requirement of the HS-SCCH Less operation, or notifying the base station and the user equipment of releasing the cache occupied by the HS-SCCH Less operation.
The rnc further includes means for resetting the MAC-HS entities of the base station and the ue prior to configuring the buffers required for HS-SCCH Less operation.
The following explains the use method of the cache required by HS-SCCH Less operation.
Cache C required for HS-SCCH Less operationlessAccording to different purposes, the different types of buffers can be further divided into buffers for storing data which is not successfully decoded and/or buffers for merging and decoding data in HS-SCCH Less operation, (the former Type is temporarily called Type1, and the latter Type is temporarily called Type 2).
The calculation mode of the cache required by HS-SCCH Less operation is as follows:
CLess＝Ns*α*TBSmax+Np*β*TBSmax
wherein, the number of the required Type1 caches is NsA, such as
Figure G2008102404964D00101
T is the minimum period of the semi-persistent resource, PTR is the maximum value that can be indicated by the Ptr field (or called pointer field) carried on the control channel, and if the Ptr field is 4bits, then PTR is 24-1 ═ 15, the network side and the UE both know the value of PTR, and the network side refers to RNC or NodeB; the number of the required Type2 caches is NpAnd (4) respectively. TBSmaxIs the maximum transport block size supported in HS-SCCHLess operation, alpha and beta are the coefficients for calculating the buffer sizes of Type1 and 2 respectively, and N is predefinedpValues of alpha, beta, e.g. Np＝2、α＝1.5、β＝3。
The network side and the UE need to know how to set up the cache of HS-SCCH Less operation, such as Type1 and 2, and the implementation mode is as follows: the network side and the UE calculate the TBS according to the formulamaxThus, the size of Type1, 2 buffer can be calculated.
The RNC caches C required by HS-SCCH Less operationLessAnd respectively informing the NodeB and the UE of the minimum period T of the parameter semi-continuous resources, wherein the parameter configuration process refers to the process of configuring the cache required by the HS-SCCH Less operation on the Iub/Iur interface and the Uu interface in the embodiment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (21)

1. A method for process cache configuration and processing is characterized in that,
the wireless network controller sends caching indication information carrying caching required by HS-SCCH Less operation to a base station; after receiving the cache indication information, the base station reserves a required cache for HS-SCCH Less operation, and sends a response message carrying cache allocation information to the wireless network controller;
a wireless network controller sends a message carrying cached configuration information which can be occupied by HS-SCCH Less operation to user equipment; or the base station informs the user equipment of the cached configuration information which can be occupied by HS-SCCH Less operation in a physical layer control channel mode;
after the base station starts the downlink semi-persistent scheduling HS-SCCH Less operation, reserving a required cache for the HS-SCCH Less operation according to the cache indication information; after the user equipment starts the operation of downlink semi-persistent scheduling HS-SCCHLess, reserving a required cache for HS-SCCH Less operation according to the configuration information;
and distributing the cache required by the reserved HS-SCCH Less operation to the HS-SCCH Less operation.
2. The method of claim 1, wherein allocating the reserved cache required for HS-SCCHLess operation to HS-SCCH Less operation is further followed by: and limiting the high-speed downlink packet access (HSDPA) process of the user equipment to use a buffer outside the reserved buffer.
3. The method of claim 1, wherein the buffering indication information comprises indication information indicating the number of processes and/or buffering amount in an existing High Speed Downlink Packet Access (HSDPA) operation, or configuration information indicating buffering required for an HS-SCCH Less operation.
4. The method of claim 1, wherein the cache allocation information comprises: the cache size available for HS-SCCH Less operation, the cache size available for the existing HSDPA operation of the user equipment, the number of processes available for the existing HSDPA operation of the user equipment, and the cache requirement of the HS-SCCH Less operation are equivalent to the number of the processes of the existing HSDPA and/or the cache size of each configured HSDPA process.
5. The method according to any of claims 1 to 4, wherein before the step of reserving the required buffer by the base station for HS-SCCH Less operation, the method further comprises: the base station judges that the current unoccupied cache of the user equipment is smallCaching C required by HS-SCCH Less operationLessThe base station releases the cache of the corresponding process according to the preset rule, and the response message sent to the wireless network controller carries the identification of the process needing to release the cache.
6. The method of claim 5, wherein the predetermined rule according to which the base station releases the process comprises one or any combination of the following rules:
randomly selecting and releasing an occupied process;
according to the priority sequence of the data stored in the occupied process, starting to release the corresponding process from the process with the lowest priority;
sequencing according to the duration of the occupied processes, and starting to release the processes from the process with the longest occupied time;
when the user equipment configures a multiple-input multiple-output (MIMO) mode, the base station pairwise releases the processes used in pairing in MIMO dual-stream transmission.
7. The method of claim 1, wherein the step of the radio network controller sending the base station the buffering indication information carrying the buffering required by the HS-SCCH Less operation comprises:
the wireless network controller converts the cache requirement of HS-SCCH Less operation and the cache required by the existing HSDPA process into the number L of the original HSDPA process;
a wireless network controller sends a message carrying a parameter L and/or a parameter (N-L) to a base station, wherein N is the total process number of user equipment;
the step of reserving the cache occupied by the HS-SCCH Less operation by the base station comprises the following steps:
the base station converts the caching requirement of HS-SCCH Less operation with the caching required by the existing HSDPA process, and converts the caching requirement C of the HS-SCCH Less operation according to the parameter L or N-LLess。
8. The method of claim 1, wherein the radio network controller sending the cached indication information carrying the HS-SCCH Less operation required to be cached to the base station comprises:
the wireless network controller sends a carrying parameter C to the base stationLessAnd/or parameters (C-C)Less) In which CLessAnd C is the maximum buffer supported by the user equipment.
9. The method according to any one of claims 1 to 4,
the configuration information includes: buffer size C available for HS-SCCH Less operationLessExisting buffer size C-C available for HSDPALessThe number of processes available for the existing HSDPA of the UE, the buffer size of each configured HSDPA process, and/or the buffer requirement for HS-SCCH Less operation is equivalent to the number L of processes of the existing HSDPA.
10. The method of claim 9, wherein the message sent by the rnc to the ue and carrying the configuration information of the cache occupied by HS-SCCH Less operation further carries the identifier of the process requiring the release of the cache or the identifier of the process used for HSDPA;
the step of allocating the buffer required by the reserved HS-SCCH Less operation to the HS-SCCH Less operation further comprises: and the UE releases the process corresponding to the process identification needing to release the cache or releases the processes except for the process used by the HSDPA.
11. The method of claim 9, wherein the step of allocating the reserved cache required for HS-SCCHLess operations to HS-SCCH Less operations further comprises: the base station or the user equipment calculates the sizes of different types of caches in HS-SCCH Less operation according to the cache configuration information sent by the wireless network controller;
the different types of caches in the HS-SCCH Less operation comprise caches for storing data which are not decoded successfully and/or caches for merging and decoding the data.
12. The method according to any of claims 1 to 4, wherein after allocating the reserved cache required for HS-SCCH Less operation to HS-SCCH Less operation, further comprising:
and releasing the cache occupied by the HS-SCCH Less operation.
13. The method of claim 12, wherein the step of releasing the buffer occupied by HS-SCCH Less operation comprises:
the wireless network controller sends a message carrying the indication information for releasing the cache occupied by the HS-SCCH Less operation to the base station;
the base station receives the message, releases the cache occupied by the HS-SCCH Less operation, and sends a response message to the wireless network controller;
the wireless network controller or the base station informs the user equipment of the instruction information of releasing the occupied cache of the HS-SCCH Less operation;
and the user equipment releases the cache occupied by the HS-SCCH Less operation according to the received indication information.
14. The method of claim 13, wherein the step of the radio network controller or the base station informing the user equipment of the indication information for releasing the cache occupied by the HS-SCCH Less operation comprises:
a wireless network controller sends a message carrying indication information for releasing the cache occupied by HS-SCCH Less operation to user equipment; or,
and the base station informs the user equipment of the indication information for releasing the cache occupied by the HS-SCCH Less operation in a physical layer control channel mode.
15. The method according to claim 13, wherein the response message sent by the base station to the rnc carries the reconfiguration information of the released buffer, or
The radio network controller carries the reconfiguration information of the released cache in a message which carries the indication information of releasing the cache occupied by the HS-SCCH Less operation and is sent to the user equipment;
the released cached reconfiguration information includes: the process identification of the cache and the size of the cache are allocated.
16. The method of claim 13, wherein before the base station releases the buffer occupied by HS-SCCHLess operation, further comprising: the base station preferentially uses the cache occupied by the non-HS-SCCH Less operation.
17. The method according to any of claims 1 to 4, wherein before said radio network controller sends the buffering indication information carrying buffering required for HS-SCCH Less operation to the base station, further comprising:
the wireless network controller makes the MAC-hs entities of the base station and the user equipment reset through the signaling of Iur/Iub and Uu interfaces respectively.
18. A system for implementing the method of claim 1, comprising a radio network controller, a base station and a user equipment,
the wireless network controller is used for sending a message carrying the configuration information cached by HS-SCCH Less operation to the base station; receiving a response message from the base station, and sending a message carrying cached configuration information which can be occupied by HS-SCCH Less operation to the user equipment;
the base station is used for reserving a cache required by HS-SCCH Less operation in the cache of the user equipment according to the received message and returning a response message to the wireless network controller;
and the user equipment is used for distributing the reserved cache required by the HS-SCCH Less operation to the HS-SCCH Less operation according to the received message and limiting the HSDPA process of the user equipment to use the cache except the reserved cache.
19. The system of claim 18, wherein the base station comprises:
the judging unit is used for judging whether the current unoccupied cache of the user equipment is larger than or equal to the cache required by the HS-SCCH Less operation indicated in the message, and if not, the releasing unit is informed to release the process;
the release unit is used for releasing the process according to a preset rule to meet the caching requirement of HS-SCCH Less operation;
and the reservation unit is used for reserving the cache which can be occupied by the HS-SCCH Less operation in the cache which is not occupied currently by the user equipment.
20. The system according to claim 18, wherein said radio network controller comprises:
the conversion unit is used for converting the cache requirement of HS-SCCH Less operation with the cache required by the prior HSDPA process;
and the notification unit is used for notifying the base station and the user equipment of the caching requirement of the HS-SCCH Less operation, or notifying the base station and the user equipment of releasing the cache occupied by the HS-SCCH Less operation.
21. The system of claim 18 wherein the rnc further comprises means for resetting MAC-HS entities of the base station and the ue prior to configuring the buffers required for HS-SCCH Less operation.
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