WO2014032497A1 - 一种组调度方法及装置 - Google Patents
一种组调度方法及装置 Download PDFInfo
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Definitions
- the present invention relates to communication technologies, and in particular, to a group scheduling method and apparatus. Background technique
- M2M Machine to Machine
- MTC Machine Type Communications
- Smart Metering has received extensive attention as a typical MTC application scenario.
- the Smart Metering service has the characteristics of high distribution density, low network-to-device control requirements, long time period on the device, time concentration, single application and fixed location.
- the traditional scheduling mode is that the network sends a physical layer control channel (LTE PDCCH (Physical Downlink Control Channel). Channel), HS-SCCH of UMTS (Shared Control Channel for HS-DSCH (High Speed Downlink Shared Channel), shared control channel for high speed downlink shared channel) / E-DCH (Enhanced Dedicated Channel) Absolute Grant Channel, The absolute permissive channel of the dedicated channel is enhanced)) a terminal is scheduled, but for the MTC application Smart Metering scenario, a large number of terminals need to transmit small data packets in the same time period, for example, all the electricity meters uniformly report power in a certain period of time, and the network has many The dynamic scheduling of the terminals one by one generates a large amount of physical layer control signaling.
- LTE PDCCH Physical Downlink Control Channel
- HS-SCCH of UMTS Shared Control Channel for HS-DSCH (High Speed Downlink Shared Channel)
- shared control channel for high speed downlink shared channel / E-DCH (Enhanced Dedicated Channel)
- M2M communication refers to communication between machines and machines without the need for human participation.
- An important feature of this type of communication is that a large number of users, that is, the number of MTC (Machine Type Communication) terminals will be much larger than the H2H (Human to Human) terminal, usually Several times the H2H terminal.
- MTC Machine Type Communication
- H2H Human to Human
- Smart Metering as a typical MTC application scenario, such as water meters, electricity meters, gas meters, hydrological monitoring, etc., they belong to the same user (such as power companies, water companies, etc.), or in an area
- the distribution is relatively dense (eg hydrological monitoring).
- the group to which the terminal belongs is learned through the subscription information.
- the terminals in the same group are terminals of a type that are relatively fixed or only active in a specific area, and need to initiate similar services at the same time.
- this type of terminal is divided into the same group, and the same group information is assigned.
- Each terminal saves the group in the USIM (UMT (Universal Mobile Telecommunications System) Subscriber Identity Module) card.
- UMI Universal Mobile Telecommunications System
- Subscriber Identity Module Subscriber Identity Module
- Information on the network side, the core network entity also saves group information.
- the group information includes the group to which the terminal belongs, the attribute group ID of the group to which it belongs.
- the base station directly determines the packet according to the service type of the UE, and allocates resources to a group of UEs in one PDCCH scheduling signaling, and the UEs in all groups pass the time division.
- the resource allocated by the PDCCH is shared.
- a PDCCH scheduled for a UE packet has a certain effective time, and the PDCCH is valid for the effective time.
- Each group has a group C-RNTK Group Cell Radio Network Temporary Identifier, and the group-scheduled PDCCH is scrambled using group C-RNTI.
- the entire time domain resource is equally divided according to the number of UEs, and each UE in the group is allocated a small time domain resource, and the time domain resources obtained by the UE in each group are relative to the entire time domain.
- the offset between the resource starting points corresponds to the intra-group identity of the UE.
- the UE After receiving the PDCCH that is scrambled by the group C-RNTI, the UE needs to determine the time of use according to the number of members in the group, the number of the UE in the group (ie, the identifier in the group), the PDCCH transmission subframe, and the PDCCH effective time of the group scheduling. Domain resource.
- the group scheduling process includes:
- the frequency domain physical resource ie, the physical resource block (PRB) location
- the frequency domain physical resource ie, the physical resource block (PRB) location
- N is the number of UEs in the group, i is the UE number)
- UL data transmission is performed according to the determined resources.
- the PDSCH/PUSCH start subframe is derived from the PDCCH transmission subframe.
- the base station directly determines the packet according to the service type of the UE, and can perform group scheduling on the UEs grouped into one group.
- the number of members in the group and the intra-group identifier of each member are In the M2M group-based communication scenario, since M2M uses the contracted group, this method cannot be directly applied. There is currently no group scheduling scheme based on M2M communication. Summary of the invention
- Embodiments of the present invention provide a group scheduling method and apparatus, so as to implement group scheduling applicable in M2M communication.
- a group scheduling method including:
- the access network device determines a feature group identifier of the terminal that establishes the communication connection, where the feature group identifier is an identifier that is assigned to the terminal according to the characteristics of the terminal when signing the contract;
- the access network device divides the terminal into a scheduling group corresponding to the feature group identifier according to the feature group identifier;
- the access network device determines that the scheduling group completes convergence, and after all the terminals in the scheduling group complete the establishment of the communication connection, perform group scheduling on the scheduling group.
- a group scheduling device comprising:
- a determining unit configured to determine a feature group identifier of the terminal that establishes the communication connection, where the feature group identifier is an identifier that is allocated to the terminal according to the characteristics of the terminal when signing the contract;
- a dividing unit configured to divide the terminal into a scheduling group corresponding to the feature group identifier according to the feature group identifier
- a scheduling unit configured to determine that the scheduling group completes convergence, and after all the terminals in the scheduling group complete the establishment of the communication connection, perform scheduling on the scheduling group.
- the embodiment of the present invention provides a group scheduling method and device.
- the access network device determines the identity group identifier of the terminal that establishes the communication connection, and then participates in the feature group identifier, and divides the terminal into the feature group identifier.
- the scheduling group is grouped, and the characteristic group identifier is allocated according to the characteristics of the terminal when signing the contract.
- the identification of the terminal implements group scheduling applicable to M2M communication.
- 1 is a schematic diagram of allocation of LTE group scheduling resources in the background art
- FIG. 2 is a flowchart of a group scheduling method according to an embodiment of the present invention.
- FIG. 3 is a flowchart of a specific group scheduling method according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of allocation of LTE group scheduling resources according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a group scheduling apparatus according to an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of an access network device according to an embodiment of the present invention. detailed description
- An embodiment of the present invention provides a group scheduling method and apparatus.
- the access network device determines a characteristic group identifier of a terminal that establishes a communication connection, and according to the characteristic group identifier, divides the terminal into an attribute group. Identifying the corresponding scheduling group, and then determining that the scheduling group completes the aggregation, and after all the terminals in the scheduling group complete the establishment of the communication connection, group scheduling is performed on the scheduling group, and the characteristic group identifier is allocated according to the characteristics of the terminal when signing the contract.
- the identification of the terminal implements group scheduling applicable to M2M communication.
- the group scheduling method provided by the embodiment of the present invention includes:
- Step S201 The access network device determines the identity group identifier of the terminal that establishes the communication connection, and the feature group identifier is an identifier that is assigned to the terminal when the characteristics of the terminal are at the time of signing;
- Step S202 The access network device divides the terminal into the scheduling group corresponding to the characteristic group identifier according to the characteristic group identifier.
- Step S203 The access network device determines that the scheduling group completes convergence, and all the terminals in the scheduling group complete the establishment of the communication connection. After that, group scheduling is performed on the scheduling group.
- the method further includes:
- the access network device determines an intra-group identifier of the terminal
- step S203 the access network device performs group scheduling on the scheduling group, which specifically includes:
- the access network device performs group scheduling on the scheduling group according to the intra-group identifier of each terminal in the scheduling group.
- the network dynamically adds the terminal to the scheduling group corresponding to the same feature group identifier, and needs to temporarily assign each group a valid intra-group identifier in the scheduling group until the group is dynamically grouped.
- All the terminals of the scheduling group establish a connection and complete the aggregation (the process of determining the membership of a scheduling group).
- the method of completing the aggregation may be that the number of terminals divided into one scheduling group is a certain number, and the number may be According to the access network device to evaluate the network load determination in the recent period of time, the method of completing the convergence may also be that the duration of the convergence reaches a certain time.
- terminals that are contracted to the same feature group may be classified into different scheduling groups.
- the terminals defining one feature group are only active or stationary in one cell, and the intra-group identifier of each terminal is agreed upon at the time of signing. At this time, the method of completing the convergence may be divided.
- the number of terminals in a scheduling group is cumulatively up to the total number of members in the subscription group. That is, the scheduling group completely corresponds to the characteristic group.
- the access network device determines the intra-group identifier of the terminal, which includes:
- the access network device assigns the terminal an intra-group identifier that is valid in the scheduling group; or The access network device determines the intra-group identity agreed by the terminal at the time of signing as the intra-group identifier of the terminal in the scheduling group. The access network device determines that the scheduling group completes the convergence, and specifically includes:
- the access network device determines that the number of terminals in the scheduling group reaches a preset number threshold, the number threshold is determined according to the network load, or the number threshold is the number of signing members of the scheduling group; and/or
- the access network device determines that the setup time of the scheduling group reaches a preset time threshold.
- the access network device performs group scheduling on the scheduling group, and specifically includes:
- the access network device allocates resources for the scheduling group, and implements data transmission with the terminals in the scheduling group on the resources.
- the resource allocation method may be a pure time division resource allocation method, or may be a time division and frequency division joint or a time division and code division joint resource allocation method, generally adopting a time division and a frequency division joint for the LTE system, and a time for the UMTS system. Points and code points are combined.
- the resource allocation result of the time division and the frequency division joint or the time division and the code division joint may be notified by the high layer common signaling (RRC (Radio Resource Control) signaling of LTE and UMTS), or may be controlled by the physical layer ( PDCCH for LTE, HS-SCCH/E-AGCH for UMTS) notification.
- RRC Radio Resource Control
- the access network device allocates resources for the scheduling group, including:
- the access network device allocates resources to the scheduling group by means of time division and frequency division or by means of time division and code division. After the access network device allocates resources to the scheduling group, it also includes:
- the access network device notifies the resources allocated by the scheduling group through high-level public signaling or through physical layer control signaling. Specifically, in the UMTS network, the signaling interaction between the RNC (Radio Network Controller) and the base station is also involved. When the access network device is specifically a base station, the access network device notifies the scheduling through high-level public signaling.
- the resources allocated by the group include:
- the base station notifies the RNC of the allocated resources, and the RNC notifies the resources allocated by the scheduling group by using high-level public signaling;
- the access network device when the access network device is specifically an RNC, the access network device notifies the resource allocated by the scheduling group by using high-level public signaling, which specifically includes:
- the resources allocated by the scheduling group are notified by the high-level public signaling; and the scheduling response message carrying the scheduling group identifier is returned to the base station.
- the high-level common signaling includes: group C-RNTI, frequency domain resource starting point, frequency domain resource granularity, number of members in the group, and each subframe. The number of scheduled terminals, the intra-group identifier of the terminal, and the PDCCH effective time of the group scheduling physical downlink control channel; In the UMTS network, resources are allocated to the scheduling group by means of time division and code division.
- the high-level common signaling includes: H-RNTI (HS-DSCH (High Speed Downlink Shared Channel) Radio Network Temporary Identifier).
- Radio network temporary identifier or group E-RNTK E-DCH (Enhanced Dedicated Channel) Radio Network Temporary Identifier, enhanced dedicated channel radio network temporary identifier), code domain resource starting point, code domain resource granularity, number of members in the group, each The number of terminals corresponding to the time slot, the intra-group identity of the terminal, the HS-PDSCH (High Speed Physical Downlink Shared Channel), or the Enhanced Physical Uplink Channel (E-PUCH) Start time slot, group scheduling HS-SCCH or E-AGCH effective time;
- a resource is allocated to a scheduling group by means of a time division and a frequency division.
- the physical layer control signaling includes: a frequency domain resource starting point, a frequency domain resource granularity, a number of members in the group, and a terminal scheduled for each subframe. Number, group scheduling PDCCH effective time;
- the scheduling group is allocated resources by means of time division and code division.
- the physical layer control signaling includes: a code domain resource starting point, a code domain resource granularity, a number of members in the group, and a terminal corresponding to each time slot. Number, time domain resource HS-PDSCH or E-PUCH start time slot, group scheduling HS-SCCH or E-AGCH effective time.
- the LTE system is taken as an example to describe the group scheduling method provided by the embodiment of the present invention in detail.
- the terminals in each group initiate a service request request (Service Request) process
- Service Request service request request
- the service establishment request process initiated by each terminal is independent of each other, but there are some differences from the conventional service establishment process. The differences are as follows:
- Each terminal initiates an RRC connection establishment process to the e B, and needs to carry an indication of supporting the group scheduling in the RRC connection establishment request (RRCConnectionRequest) message, and carries the Group Id (attribute group identifier); the foregoing information may also be completed in the RRC connection establishment ( RRC ConnectionSetup Complete ) carries the message; or may carry only the indication supporting the group scheduling in the above message;
- the eNB When the RRC message received by the eNB only supports the indication of the group scheduling, and there is no Group Id, the eNB needs to forward the NAS (Non-Access Stratum) service request message of the UE through the S1 interface, from the core network. After receiving the NAS service request message, the MME (Mobility Management Entity, mobility management entity) sends an S1 initial context message to the eNB, where the message carries the Group Id;
- NAS Non-Access Stratum
- the eNB After receiving the terminal with a certain Group Id identifier for the first time, the eNB first determines whether to perform group scheduling on the terminal identified by the Group Id according to the current network load. If the group can be scheduled to be scheduled, a scheduling is established for the group Id. Group, for the dynamic grouping mode, start a convergence counter or aggregation timer corresponding to the Group Id, and the maximum value of the counter may be determined after the access network device evaluates the network load of the latest period of time; for the contracted fixed grouping mode, start a pair Should be the aggregation counter of Group Id, the maximum value of the counter can be the total contract of the feature group The number of members.
- e B joins the terminal with the Group Id to the scheduling group, and temporarily allocates a common group C-RNTI for the group of terminals.
- each terminal is temporarily assigned an intra-group identifier corresponding to the terminal, and the intra-group identifier is valid only in the scheduling group.
- the intra-group identifier is known at the time of signing.
- the eNB carries the group C-RNTI and the intra-group identifier in the RRC connection reconfiguration message sent to the terminal in each group.
- the eNB After all the terminals of the scheduling group complete the connection establishment, the eNB starts scheduling the group of terminals by using a PDCCH scrambled by the group C-RNTI. For the dynamic grouping mode, at the same time, the eNB restarts the convergence counter or the timer, and divides the terminal that newly accesses the same Group Id into a new scheduling group, and continues the above process;
- the group scheduling method provided by the embodiment of the present invention includes:
- Step S301 the first terminal initiates a connection establishment process, the first terminal reports an indication of supporting the group scheduling to the eNB;
- Step S302 the eNB determines whether the first terminal reports the Group Id, and if not, performs step S303, and if yes, performs step S305;
- Step S303 the eNB requests the MME to the Group Id of the first terminal
- Step S304 the eNB receives the Group Id of the first terminal returned by the MME;
- Step S305 Determine whether to perform group scheduling, and when determining to perform group scheduling, establish a scheduling group, start an aggregation counter or a convergence timer;
- Step S306 sending an RRC connection reconfiguration message to the first terminal, carrying the group C-RNTI, and carrying the assigned intra-group identifier when using the dynamic grouping mode;
- Step S307 The first terminal sends an RRC connection reconfiguration complete message to the eNB.
- Step S308 When the other terminal initiates the connection establishment process, the connection is established in the manner of steps S301 to S307. It is noted that, in step S305, only other terminals are added to the scheduling group, and the scheduling does not need to be re-established. Group
- Step S309 determining that the convergence reaches a maximum value during the summer period or the convergence timer expires
- Step S310 Perform downlink data/uplink data transmission by using the PDCCH scrambled by the group C-RNTI.
- the difference between UMTS and LTE is that the RNC in the access network device is responsible for handling RRC signaling, the NodeB scheduling terminal, and the interaction between the NodeB and the RNC.
- the group Id After the RNC obtains the Group Id from the UE or the core network, the group Id is notified to the NodeB to request the group scheduling by using the BAP message.
- the NodeB determines whether to perform group scheduling on the terminal identified by the Group Id according to the current network load.
- the Group Id establishes a scheduling group, adds the UE to the scheduling group, and responds to the RNC by the BAP message to implement group scheduling.
- the intra-group identifier of each member in the scheduling group may be an RNC allocation or a NodeB allocation. If it is an RNC allocation, it needs to be explicitly configured to the base station. If it is a base station allocation, the base station needs to feed back to the RNC in the response message, and the RNC sends the RRC message to the terminal.
- For all UEs in a scheduling group first allocate a resource with a large time domain and a frequency domain, and then equally divide the entire time domain resource and the frequency domain resource according to the number of UEs, and allocate a small time domain resource for each UE in the group. And the frequency domain resource, the offset between the time domain and the frequency domain resource obtained by the UE in each group relative to the entire time domain and the frequency domain resource start point corresponds to the intra-group identifier of the UE.
- each UE After receiving the PDCCH of the group C-RNTI scrambling, each UE needs to be based on the frequency domain resource starting point PRB_start, the frequency domain resource granularity PRB unit (how many PRBs each UE occupies), the number of members in the group N, and each subframe scheduling.
- the number of users K, the intra-group identity UE_Id of the UE, the time domain resource start subframe, and the group scheduling PDCCH effective time T can determine the time domain and frequency domain resources used by the UE.
- the time domain resource (PDSCH/PUSCH) start subframe is obtained according to the group scheduling PDCCH transmission subframe, and the time domain resource granularity is 1 subframe.
- the frequency domain resource starting point PRB_start, the frequency domain resource granularity PRB_unit, the number of members in the group N, the number of users K scheduled in each subframe, and the group scheduling PDCCH effective time T may be carried by RRC signaling, or may be performed by a physical control channel.
- the PDCCH carries.
- the intra-group identity UE_Id of the UE has been mentioned above, carried by RRC signaling, or determined at the time of signing.
- the number of members in the group N can only be carried by the physical control channel PDCCH.
- the resource frequency domain is equally divided into K parts, that is, one.
- N K * n
- n users can be scheduled by ⁇
- the first ⁇ scheduling number is 0 ⁇ ⁇ -1 users
- the second ⁇ Scheduling K 2K-1 users and so on
- LTE Similar to LTE, it simply turns the frequency domain into a code domain. Specifically, for all UEs in a scheduling group, first allocate A resource with a large time domain and a code domain, and then equally divides the entire time domain resource and the code domain resource according to the number of UEs, and allocates a small time domain resource and a code domain resource for each UE in the group, and UEs in each group The obtained time domain, the offset of the code domain resource relative to the entire time domain, and the start of the code domain resource correspond to the intra-group identifier of the UE.
- each UE After receiving the HS-SCCH or E-AGCH carrying the group H-RNTI or the group E-RNTI, each UE needs to use the code domain start (Code_start) and the code domain resource granularity (Code_unit, how many SF16 codes each UE occupies. Channel), the number of members in the group N, the number of users in each slot K, the intra-group identity of the UE (UE_Id), the time domain resource (HS-PDSCH or E-PUCH) starting time slot, the group scheduling HS-SCCH Or the E-AGCH effective time T can determine the time domain and frequency domain resources used by the UE.
- the time domain resource granularity is 1 time slot.
- the code_start, the code unit, the number of members in the group N, the number of users K in each time slot, the time domain resource start time slot, the group scheduling HS-SCCH, or the E-AGCH effective time T may be carried by RRC signaling. It can also be carried by the physical control channel HS-SCCH or E-AGCH.
- the intra-group identity of the UE is carried by RRC signaling or determined at the time of signing.
- the number of members in the group N can only be carried by the physical control channel HS-SCCH/E-AGCH.
- the NodeB If the resource allocation of the group scheduling is notified by RRC signaling, the NodeB also needs to notify the RNC of the resource allocation of the group scheduling through the BAP message, and the RNC notifies the UE through the RRC signaling; If the allocation is through the physical layer control channel HS-SCCH/E-AGCH notification, the NodeB transmits directly, and does not need to interact with the RNC.
- the schematic diagram of the scheduling resource allocation of the UMTS group is similar to that of FIG. 4 except that the frequency domain is changed into a code domain.
- the terminal concerned when the terminal concerned establishes a communication connection, it needs to notify the access network device to support the group scheduling indication, and sometimes needs to notify the access network device group identifier, thereby requesting group scheduling, and the network learns the information and decides to proceed.
- the processing method for group communication provided by the embodiment of the present invention is different from the processing method for single terminal communication.
- the LTE system is taken as an example, and several methods are given, but the notification method of the specific group scheduling request is not limited to the following:
- Method 1 adding an information element in the RRCConnectionRequest message: Supporting group scheduling indication groupConnection, in which the randomValue (random value) in the Initial UE-Identity represents the service feature identifier Group ID (Group identification).
- criticalExtensions CHOICE ⁇ rrcConnectionRequest-r8 RRCConnectionRequest-r8-IEs. criticalExtensionsFuture SEQUENCE ⁇ ⁇
- Method 2 Add an information element, a group identifier Group ID, in the RRCConnectionSetupComplete message.
- Method 3 Judging by the preamble (preamble) during random access. Specifically, the method may allocate one or some dedicated preambles to the terminal that supports the group scheduling, and the eNB may determine, according to the preamble used in the terminal random access procedure, whether the connection establishment is a group scheduling request;
- the method 4 adds an information element to the uplink RRC message, such as the RRCConnectionRequest or the RRCConnectionSetupComplete, to indicate that the connection establishment request is a group scheduling request, and the eNB queries the core network to obtain the group identifier.
- an information element such as the RRCConnectionRequest or the RRCConnectionSetupComplete
- the above method is also applicable to the UMTS.
- the access network device needs to notify the UE of the resource allocation of the group scheduling.
- the PDCCH signaling may be notified through the physical layer control channel or the PDCCH notification.
- the notified resource allocation content may include all or part of the content as shown in Table 1:
- Group RNTI (Group C-RNTI) is allocated when the network establishes a scheduling group.
- the integer is represented by a binary digit.
- the starting point of the frequency domain resource is PRB_start integer or expressed in binary digits.
- Frequency domain resource granularity PRB unit integer or expressed in binary bits
- the number of members in the group N is only indicated in the aggregation counting method, and the convergence timing method does not indicate
- the number of users scheduled per subframe K integer or expressed in binary digits
- Intra-group identification UE_Id is only used in dynamic grouping mode, and the contracted fixed grouping mode does not indicate, integer or binary digits.
- the notified resource allocation content may include all or part of the content as shown in Table 2:
- the access network device For the UMTS system, after the access network device divides the UE into the scheduling group, it also needs to notify the UE of the resource allocation of the group scheduling. At this time, it may be notified by RRC signaling, or may be notified by the physical layer control channel HS-SCCH or E-AGCH.
- the notified resource allocation content may include all or part of the content as shown in Table 3: Table 3 RRC signaling notified resource allocation content in the UMTS system
- the notified resource allocation content may include all or part of the contents as shown in Table 4: Resource allocation content notified by RRC signaling in the UMTS system
- the resource allocation method using time division and frequency division is as follows:
- the frequency domain resource granularity PRB_unit 2
- the number of members in the group N 100
- the number of users scheduled per subframe K 10
- the group scheduling effective time ⁇ 30
- the third frequency band of the seventh, 17, and 27 subframes starting from the start subframe within the effective time (the frequency domain location PRB number is 16, and the length is 2 PRBs) get scheduled.
- the embodiment of the present invention further provides a group scheduling apparatus, as shown in FIG. 5, including:
- the determining unit 501 is configured to determine a feature group identifier of the terminal that establishes the communication connection, where the feature group identifier is an identifier that is allocated to the terminal according to the characteristics of the terminal when signing the contract;
- the dividing unit 502 is configured to divide the terminal into the scheduling group corresponding to the characteristic group identifier according to the characteristic group identifier, and the scheduling unit 503 is configured to determine that the scheduling group completes the convergence, and after all the terminals in the scheduling group complete the establishment of the communication connection, Group scheduling is performed on the scheduling group.
- the dividing unit 502 is further configured to:
- the scheduling unit performs group scheduling on the scheduling group, which specifically includes:
- the access network device performs group scheduling on the scheduling group according to the intra-group identifier of each terminal in the scheduling group.
- the dividing unit 502 determines the intra-group identifier of the terminal, and specifically includes:
- the intra-group identity agreed upon by the terminal at the time of signing is determined as the intra-group identity of the terminal in the scheduling group.
- the scheduling unit 503 determines that the scheduling group completes convergence, and specifically includes:
- the number threshold is determined according to network load, or the number threshold is the number of signing members of the scheduling group;
- the scheduling unit 503 performs group scheduling on the scheduling group, and specifically includes:
- the scheduling unit 503 allocates resources for the scheduling group, and specifically includes:
- the scheduling group is allocated resources by means of time division and frequency division or by means of time division and code division.
- the scheduling unit 503 is also used to:
- the resources allocated by the scheduling group are notified through high-level public signaling or through physical layer control signaling.
- the scheduling unit 503 notifies the resources allocated by the scheduling group through high-level public signaling, which specifically includes:
- the resources allocated by the scheduling group are notified by the high-level public signaling; and the scheduling response message carrying the scheduling group identifier is returned to the base station.
- the access network device provided by the embodiment of the present invention includes:
- the first processor 601 is configured to determine a feature group identifier of the terminal that establishes the communication connection, where the feature group identifier is an identifier that is assigned to the terminal when the identity of the terminal is located at the time of signing; according to the feature group identifier, the terminal is classified into the feature group identifier. In the scheduling group;
- the second processor 602 is configured to determine that the scheduling group completes the aggregation, and after all the terminals in the scheduling group complete the establishment of the communication connection, perform scheduling on the scheduling group.
- the first processor 601 is further configured to: According to the feature group identifier, after the terminal is divided into the scheduling group corresponding to the feature group identifier, the intra-group identifier of the terminal is determined; the scheduling unit performs group scheduling on the scheduling group, which specifically includes:
- the access network device performs group scheduling on the scheduling group according to the intra-group identifier of each terminal in the scheduling group.
- the first processor 601 determines the intra-group identifier of the terminal, and specifically includes:
- the intra-group identity agreed upon by the terminal at the time of signing is determined as the intra-group identity of the terminal in the scheduling group.
- the second processor 602 determines that the scheduling group completes convergence, and specifically includes:
- the number threshold is determined according to network load, or the number threshold is the number of signing members of the scheduling group;
- the second processor 602 performs group scheduling on the scheduling group, and specifically includes:
- the second processor 602 allocates resources to the scheduling group, and specifically includes:
- the scheduling group is allocated resources by means of time division and frequency division or by means of time division and code division.
- the second processor 602 is also used to:
- the resources allocated by the scheduling group are notified through high-level public signaling or through physical layer control signaling.
- the scheduling unit 503 notifies the resources allocated by the scheduling group through high-level public signaling, which specifically includes:
- the resources allocated by the scheduling group are notified by the high-level public signaling; and the scheduling response message carrying the scheduling group identifier is returned to the base station.
- an MTC device of a feature group is likely to be dispersed in multiple cells, and a cell does not cover all the MTC devices of the feature group.
- a packet mode needs to be considered.
- the method of dynamically grouping or signing a packet solves the problem of how to determine the number of members and how to identify the in-group identifier of each member.
- the embodiment of the present invention further provides a resource allocation method for time division and frequency division joint or time division and code division joint. , improve system resource utilization.
- the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
- the present invention is in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
本申请公开了一种组调度方法及装置,涉及通信技术,接入网设备在有终端建立连接时,确定建立通信连接的终端的特性组标识,并根据该特性组标识,将终端划分到特性组标识对应的调度组中,进而在确定调度组完成汇聚,且调度组中的终端全部完成通信连接的建立后,对该调度组进行组调度,而特性组标识为在签约时根据终端的特性分配给终端的标识,实现了可应用于M2M通信中的组调度。
Description
一种组调度方法及装置
本申请要求在 2012年 8月 30日提交中国专利局、 申请号为 201210316604.8、 发明名 称为"一种组调度方法及装置"的中国专利申请的优先权, 其全部内容通过引用结合在本申 请中。
技术领域
本发明涉及通信技术, 尤其涉及一种组调度方法及装置。 背景技术
M2M ( Machine to Machine, 机器到机器)通信是未来智能化发展的一种趋势。 在第 三代移动通信系统以及其长期演进系统中需要支持 MTC ( Machine Type Communications, 机器型通信)功能。 其中 Smart Metering (智能计量)作为一种典型的 MTC应用场景得到 了广泛的关注。 Smart Metering业务具有分布密度高、 网络对设备的控制需求低、 设备上 ■ί艮业务的时间周期长, 时间集中、 应用单一及位置固定等特点。
对于 LTE ( Long Term Evolution , 长期演进) 和 UMTS ( Universal Mobile Telecommunications System, 通用移动通信系统) 系统, 传统的调度方式是网络发送一条 物理层控制信道( LTE的 PDCCH( Physical Downlink Control Channel ,物理下行控制信道 ), UMTS的 HS-SCCH ( Shared Control Channel for HS-DSCH ( High Speed Downlink Shared Channel ), 高速下行共享信道的共享控制信道) /E-AGCH ( E-DCH ( Enhanced Dedicated Channel ) Absolute Grant Channel , 增强专用信道的绝对许可信道))调度一个终端, 但对 于 MTC应用 Smart Metering场景, 大量终端要在同一时间段进行小数据包传输,例如某时 间段所有电表统一上报电量, 此时网络对众多的终端一一进行动态调度会产生大量的物理 层控制信令。
下面对 M2M基于组的通信进行具体介绍:
M2M通信是指机器和机器之间的通信, 无需人的参与。 该类型通信的一个重要的特 征是数量较大的用户, 也就是 MTC ( Machine Type Communication, 机器类型通信)终端 的数目将会远远大于 H2H ( Human to Human, 人与人) 的终端, 通常是 H2H终端的几十 倍。对于一种行业应用 Smart Metering,作为一种典型的 MTC应用场景, 比如水表, 电表, 煤气表, 水文监测等, 他们或者属于同一个用户 (例如电力公司、 自来水公司等), 或者 在一个区域内分布比较密集(例如水文监测)。 在其管理员需要对某个用户的 MTC设备或 某个区域内的所有 MTC设备获取公共信息时,如果分别对每个 MTC设备进行寻呼或者向 每个 MTC设备发送相同的信息内容, 就会造成一定程度的资源浪费。 如果将属于同一用
户或在同一区域范围内的 MTC设备组成群组, 基于群组进行管理和控制, 将会减少资源 浪费, 提高资源利用率。
M2M基于组的通信中, 终端所属的组是通过签约信息获知的, 同一组中的终端是位 置相对固定或只在特定区域内活动, 且需要同时在特定时段发起同类业务的一类终端, 在 签约时将这一类终端划分到同一个组, 并分配了相同的组信息,每个终端在 USIM ( UMTS ( Universal Mobile Telecommunications System ) Subscriber Identity Module, 通用移动通信 系统用户识别模块)卡中保存组信息, 在网络侧, 核心网实体也会保存组信息。 组的信息 包括该终端所属的组, 所属组的特性组标识等。
对于 LTE 系统, 目前已有一种基于时分的组调度方案, 基本思想是: 基站直接根据 UE的业务类型确定分组, 在一条 PDCCH调度信令里对一组 UE进行资源分配, 所有组内 UE通过时分共享方式该 PDCCH分配的资源。一条针对 UE分组进行调度的 PDCCH具有 一定生效时间, PDCCH在该生效时间内有效。每组有一个 group C-RNTK Group Cell Radio Network Temporary Identifier, 基于组的小区无线网络临时标识), 组调度的 PDCCH使用 group C-RNTI加扰。
具体来说, 对于组内所有 UE, 按 UE数目对整个时域资源进行等分, 为组内每个 UE 分配一小段时域资源, 每个组内 UE获得的时域资源相对于整个时域资源起点之间的偏移 对应着该 UE的组内标识。 UE接收到 group C-RNTI加扰的 PDCCH后需要根据组内成员 个数、 UE在组内的编号 (即组内标识)、 PDCCH发送子帧、 组调度 PDCCH生效时间就 可以确定自身使用的时域资源。
例如, 设基站将若千个 UE分为一组, 则如图 1所示, 组调度流程包括:
一旦 UE接收到针对自身归属组的 Group C-RNTI加扰的 PDCCH, 则根据 PDCCH指 示的频域资源确定该 UE可以使用的频域物理资源 (即 PRB ( Physical Resource Block, 物 理资源块)位置), 并根据 UE的组内标识确定其可以使用的时域物理资源 (即 TTI, UEi 可以使用的 TTI ( Transmission Time Interval, 发送时间间隔)取值为满足 M mod N = i的 子帧, 其中 M为当前时刻与 PDSCH ( Physical Downlink Shared Channel, 下行物理共享信 道) /PUSCH ( Physical Uplink Shared Channel, 上行物理共享信道)起始子帧之间的帧间 隔, M=0表明当前时刻 ^始子帧, N为组内 UE个数, i为 UE编号), 然后按照确定的 资源进行 UL数据传输即可。 PDSCH/PUSCH起始子帧由 PDCCH发送子帧得出。
但是本发明的发明人发现, 在 LTE系统中, 基站直接根据 UE的业务类型确定分组, 就可以对划为一组的 UE进行组调度, 组内成员个数和每个成员的组内标识是确定的, 而 M2M基于组的通信场景中, 由于 M2M釆用签约分组, 所以不能直接应用该方式。
目前还没有基于 M2M通信的组调度方案。 发明内容
本发明实施例提供一种组调度方法及装置, 以实现可应用于 M2M通信中的组调度。 一种组调度方法, 包括:
接入网设备确定建立通信连接的终端的特性组标识, 所述特性组标识为在签约时根据 所述终端的特性分配给所述终端的标识;
接入网设备根据所述特性组标识, 将所述终端划分到所述特性组标识对应的调度组 中;
接入网设备确定所述调度组完成汇聚, 且所述调度组中的终端全部完成通信连接的建 立后, 对该调度组进行组调度。
一种组调度装置, 包括:
确定单元, 用于确定建立通信连接的终端的特性组标识, 所述特性组标识为在签约时 才艮据所述终端的特性分配给所述终端的标识;
划分单元, 用于根据所述特性组标识, 将所述终端划分到所述特性组标识对应的调度 组中;
调度单元, 用于确定所述调度组完成汇聚, 且所述调度组中的终端全部完成通信连接 的建立后, 对该调度组进行组调度。
本发明实施例提供一种组调度方法及装置, 接入网设备在有终端建立连接时, 确定建 立通信连接的终端的特性组标识, 并才 居该特性组标识, 将终端划分到特性组标识对应的 调度组中, 进而在确定调度组完成汇聚, 且调度组中的终端全部完成通信连接的建立后, 对该调度组进行组调度, 而特性组标识为在签约时根据终端的特性分配给终端的标识, 实 现了可应用于 M2M通信中的组调度。 附图说明
图 1为背景技术中 LTE组调度资源分配示意图;
图 2为本发明实施例提供的组调度方法流程图;
图 3为本发明实施例提供的较具体的组调度方法流程图;
图 4为本发明实施例提供的 LTE组调度资源分配示意图;
图 5为本发明实施例提供的组调度装置结构示意图;
图 6为本发明实施例提供的接入网设备结构示意图。
具体实施方式
本发明实施例提供一种组调度方法及装置, 接入网设备在有终端建立连接时, 确定建 立通信连接的终端的特性组标识, 并# ^据该特性组标识, 将终端划分到特性组标识对应的 调度组中, 进而在确定调度组完成汇聚, 且调度组中的终端全部完成通信连接的建立后, 对该调度组进行组调度, 而特性组标识为在签约时根据终端的特性分配给终端的标识, 实 现了可应用于 M2M通信中的组调度。
如图 2所示, 本发明实施例提供的组调度方法包括:
步骤 S201、接入网设备确定建立通信连接的终端的特性组标识, 特性组标识为在签约 时才 居终端的特性分配给终端的标识;
步骤 S202、 接入网设备根据特性组标识, 将终端划分到特性组标识对应的调度组中; 步骤 S203、接入网设备确定调度组完成汇聚, 且调度组中的终端全部完成通信连接的 建立后, 对该调度组进行组调度。
进一步, 在步骤 S202接入网设备根据特性组标识, 将终端划分到特性组标识对应的 调度组中后, 还包括:
接入网设备确定终端的组内标识;
此时, 步骤 S203中接入网设备对该调度组进行组调度, 具体包括:
接入网设备根据调度组内各终端的组内标识, 对该调度组进行组调度。
其中, 当釆用动态分组的方式进行分组时, 网络将该终端动态加入到同一特性组标识 对应的调度组, 并需要为每个终端临时分配一个在该调度组内有效的组内标识, 直到该调 度组的所有终端都建立连接, 完成汇聚(确定一个调度组的成员组成的过程); 此时, 完 成汇聚的方法可以是被划分为一个调度组的终端数目累计达到一定数目, 该数目可以根据 接入网设备评估最近一段时间的网络负荷确定, 完成汇聚的方法也可以是汇聚的持续时间 长度达到一定时间。
需要说明的是, 釆用该分组方式时, 签约到同一个特性组的终端, 可能被划分到不同 的调度组中。
当釆用签约固定分组的方式进行分组时, 限定一个特性组的终端只在一个小区内活动 或静止, 每个终端的组内标识在签约时约定, 此时, 完成汇聚的方法可以是被划分为一个 调度组的终端数目累计达到签约该特性组的总成员个数, 即调度组完全与特性组对应。
基于上述两种分组方式, 接入网设备确定终端的组内标识, 具体包括:
接入网设备为该终端分配一个在该调度组内有效的组内标识; 或者
接入网设备将该终端在签约时约定的组内标识确定为终端在该调度组内的组内标识。 接入网设备确定调度组完成汇聚, 则具体包括:
接入网设备确定调度组中的终端数目达到预先设定的数目阈值, 数目阈值根据网络负 荷确定, 或者数目阈值为调度组的签约成员数目; 和 /或
接入网设备确定调度组的建立时间达到预先设定的时间阈值。
在本发明实施例中, 接入网设备对该调度组进行组调度, 具体包括:
接入网设备为调度组分配资源, 并在资源上实现与调度组内终端的数据传输。
其中, 资源分配方法可以是纯时分资源分配方法, 也可以是时分和频分联合或者时分 和码分联合的资源分配方法, 通常对于 LTE系统釆用时分和频分联合, 对于 UMTS 系统 则釆用时分和码分联合。 时分和频分联合或者时分和码分联合的资源分配结果可以通过高 层公共信令 ( LTE和 UMTS的 RRC ( Radio Resource Control, 无线资源控制 )信令 )通知, 也可以通过物理层控制信令 ( LTE的 PDCCH, UMTS的 HS-SCCH/E-AGCH )通知。
此时, 接入网设备为调度组分配资源, 具体包括:
接入网设备通过时分和频分联合或者通过时分和码分连接的方式为调度组分配资源。 接入网设备为调度组分配资源后, 还包括:
接入网设备通过高层公共信令或者通过物理层控制信令通知调度组所分配的资源。 具体的, 在 UMTS网络中, 还涉及到 RNC ( Radio Network Controller, 无线网络控制 器)和基站间的信令交互, 接入网设备具体为基站时, 接入网设备通过高层公共信令通知 调度组所分配的资源, 具体包括:
基站接收到无线网络控制器 RNC发送的携带调度组标识的调度请求消息;
基站将所分配的资源通知给 RNC, 并由 RNC通过高层公共信令通知调度组所分配的 资源;
基站接收 RNC返回的携带调度组标识的调度响应消息;
或者, 接入网设备具体为 RNC 时, 接入网设备通过高层公共信令通知调度组所分配 的资源, 具体包括:
向基站发送携带调度组标识的调度请求消息;
接收基站通知的分配的资源后, 通过高层公共信令通知调度组所分配的资源; 向基站返回携带调度组标识的调度响应消息。
在 LTE网络中,通过时分和频分联合的方式为调度组分配资源,高层公共信令中包括: 组 C-RNTI、 频域资源起点、 频域资源粒度、 组内成员个数、 每个子帧调度的终端个数、 终端的组内标识、 组调度物理下行控制信道 PDCCH生效时间;
在 UMTS网络中, 通过时分和码分联合的方式为调度组分配资源, 高层公共信令中包 括:组 H-RNTI ( HS-DSCH ( High Speed Downlink Shared Channel ) Radio Network Temporary Identifier,高速下行共享信道无线网络临时标识)或组 E-RNTK E-DCH( Enhanced Dedicated Channel ) Radio Network Temporary Identifier, 增强专用信道无线网络临时标识)、 码域资 源起点、 码域资源粒度、 组内成员个数、 每个时隙对应的终端个数、 终端的组内标识、 时 域资源 HS-PDSCH( High Speed Physical Downlink Shared Channel,高速下行物理共享信道) 或 E-PUCH ( Enhanced Physical Uplink Channel , 增强上行物理信道) 的起点时隙、 组调度 HS-SCCH或 E-AGCH生效时间;
在 LTE网络中, 通过时分和频分联合的方式为调度组分配资源, 物理层控制信令中包 括:频域资源起点、频域资源粒度、组内成员个数、每个子帧调度的终端个数、组调度 PDCCH 生效时间;
在 UMTS网络中, 通过时分和码分联合的方式为调度组分配资源, 物理层控制信令中 包括: 码域资源起点、 码域资源粒度、 组内成员个数、 每个时隙对应的终端个数、 时域资 源 HS-PDSCH或 E-PUCH起点时隙、 组调度 HS-SCCH或 E-AGCH生效时间。
下面以 LTE系统为例, 对本发明实施例提供的组调度方法进行详细说明,
对于 LTE, 当有数据需要发送时, 各组内终端发起业务建立请求( Service Request )过 程, 每个终端发起的业务建立请求过程都是相互独立的, 但与常规的业务建立过程有一些 区别, 区别如下:
每个终端向 e B 发起 RRC 连接建立过程, 需要在 RRC 连接建立请求 ( RRCConnectionRequest )消息中携带支持组调度的指示,并携带 Group Id (特性组标识); 上述信息也可以在 RRC连接建立完成( RRC ConnectionSetup Complete ) 消息中携带; 或 者可以在上述消息中仅携带支持组调度的指示;
当 eNB收到的 RRC消息中仅有支持组调度的指示、 没有 Group Id时, eNB需要在通 过 S 1接口转发 UE的 NAS ( Non Access Stratum, 非接入层 ) 业务请求消息时, 从核心网 请求获取该终端的 Group Id, MME ( Mobility Management Entity, 移动性管理实体) 收到 NAS业务请求消息后, 向 eNB发送 S 1初始上下文消息, 该消息携带 Group Id;
eNB第一次收到具有某 Group Id标识的终端接入后,首先根据当前网络负荷判决是否 对该 Group Id标识的终端实施组调度, 如果判决可以进行组调度, 则针对该 Group Id建立 一个调度组, 对于动态分组方式, 启动一个对应该 Group Id的汇聚计数器或汇聚定时器, 计数器的最大值可以是接入网设备评估最近一段时间的网络负荷后确定; 对于签约固定分 组方式, 启动一个对应该 Group Id的汇聚计数器, 计数器的最大值可以是特性组的总签约
成员个数。 在该汇聚计数器没有达到最大值或该汇聚定时器没有超时的时间内 , e B将具 有该 Group Id 的终端都加入到该调度组中, 并为该组终端临时分配一个共同的 group C-RNTI, 对于动态分组方式, 还为每个终端临时分配一个对应该终端的组内标识, 该组内 标识只在调度组内有效, 对于签约固定分组方式, 组内标识是签约时已知的。 eNB在发给 每个组内终端的 RRC连接重配置消息中携带 group C-RNTI和组内标识。
当该调度组的终端全部完成连接建立后, eNB 通过一条使用 group C-RNTI加扰的 PDCCH开始调度该组终端。 对于动态分组方式, 与此同时, eNB重启汇聚计数器或定时 器, 并将新接入相同的该 Group Id的终端划分到一个新的调度组, 继续上述过程;
如图 3所示, 本发明实施例提供的组调度方法包括:
步骤 S301、 第一终端发起连接建立过程, 第一终端向 eNB上报支持组调度的指示; 步骤 S302、 eNB确定第一终端是否上报 Group Id, 如果否, 执行步骤 S303 , 如果是, 执行步骤 S305 ;
步骤 S303、 eNB向 MME请求第一终端的 Group Id;
步骤 S304、 eNB接收 MME返回的第一终端的 Group Id;
步骤 S305、 判断是否进行组调度, 并在确定进行组调度时, 建立调度组, 启动汇聚计 数器或汇聚定时器;
步骤 S306、 向第一终端发送 RRC连接重配置消息, 携带 group C-RNTI, 在釆用动态 分组方式时还携带分配的组内标识;
步骤 S307、 第一终端向 eNB发送 RRC连接重配置完成消息;
步骤 S308、 其它终端在发起连接建立过程时, 按照步骤 S301〜步骤 S307的方式建立 连接, 需要注意的是, 在步骤 S305 中, 只要将其它终端添加到该调度组即可, 不需要重 新建立调度组;
步骤 S309、 确定汇聚其暑期达到最大值或汇聚定时器超时;
步骤 S310、 通过 group C-RNTI加扰的 PDCCH进行下行数据 /上行数据的传输。
对于 UMTS , 需要说明的是, 上述基于组调度的组通信连接建立的过程也同样适用。
UMTS和 LTE不同的是, 接入网设备中 RNC负责处理 RRC信令, NodeB调度终端, 且存 在 NodeB和 RNC之间的交互。
当 RNC从 UE或核心网获得 Group Id后, 首先通过 BAP消息将 Group Id通知给 NodeB请求组调度, NodeB根据当前网络负荷判决是否对该 Group Id标识的终端实施组调 度,若判决成功,则针对该 Group Id建立调度组,将该 UE加入到调度组中, 并通过 BAP 消息向 RNC响应要实施组调度。
调度组里每个成员的组内标识可以是 RNC分配, 也可以是 NodeB分配, 如果是 RNC 分配, 则需要明确配置给基站。 如果是基站分配, 则基站需要在响应消息中反馈给 RNC, RNC再通过 RRC消息发给终端。
下面针对 LTE和 UMTS 系统, 分别对本发明实施例中时分和频分联合或者时分和码 分联合的资源分配方法进行说明。
LTE系统:
对于一个调度组的所有 UE, 首先分配一块时域和频域较大的资源,接着按 UE数目对 整个时域资源和频域资源进行等分, 为组内每个 UE分配一小段时域资源和频域资源, 每 个组内 UE获得的时域、频域资源相对于整个时域、频域资源起点之间的偏移对应着该 UE 的组内标识。 每个 UE接收到 group C-RNTI加扰的 PDCCH后, 需要根据频域资源起点 PRB_start、 频域资源粒度 PRB unit (每个 UE占用多少个 PRB )、 组内成员个数 N、 每个 子帧调度的用户个数 K、 UE的组内标识 UE_Id、 时域资源起点子帧、 组调度 PDCCH生效 时间 T就可以确定 UE使用的时域和频域资源。 时域资源 ( PDSCH/PUSCH )起点子帧是 根据组调度 PDCCH发送子帧得出, 时域资源粒度是 1个子帧。
其中, 频域资源起点 PRB_start、 频域资源粒度 PRB_unit、 组内成员个数 N、 每个子 帧调度的用户个数 K、组调度 PDCCH生效时间 T可以由 RRC信令携带,也可以由物理控 制信道 PDCCH携带。 UE的组内标识 UE_Id在前面已提到, 由 RRC信令携带, 或签约时 确定。
注: 如果釆用汇聚定时器方式, 组内成员个数 N只能由物理控制信道 PDCCH携带。 具体来说, 如图 4所示, 一个调度组有 N个用户, 将资源频域等分为 K份, 即 1个
TTI内调度 K个用户, N是 K的整数 n倍, N = K * n, 则由 η个 ΤΤΙ可以调度 Ν个用户, 第一个 ΤΤΙ调度编号为 0 ~ Κ-1个用户, 第二个 ΤΤΙ调度 K 2K-1个用户, 依次类推, 最 后一个 ΤΤΙ调度最后 Κ个用户 ( n-1 ) K ~ N-1。 假设组调度 PDCCH生效时间 T=3n, 即在 生效时间内可以对 Ν个用户连续调度 3次。
每个 UE都根据 UE的组内标识确定其可以使用的时域频域物理资源, 若 Μ个子帧第 j个频段(频域位置为 PRB_start +j * PRB unit )分配给第 i个用户, 则 ( M mod n ) * K+ j = i, 其中 M为当前时刻与 PDSCH/PUSCH起始子帧之间的帧间隔, 取值范围为 0~生效时 间 T-1 , M=0表明当前时刻是 PDSCH/PUSCH起始子帧, i为 UE的组内标识, 取值范围为 0-N-1 , j为频域偏移, 取值范围为 0~K-1。
UMTS系统:
和 LTE相似, 只是将频域变为码域。 具体的, 对于一个调度组的所有 UE, 首先分配
一块时域和码域较大的资源, 接着按 UE数目对整个时域资源和码域资源进行等分, 为组 内每个 UE分配一小段时域资源和码域资源, 每个组内 UE获得的时域、 码域资源相对于 整个时域、 码域资源起点之间的偏移对应着该 UE 的组内标识。 每个 UE接收到携带组 H-RNTI或组 E-RNTI的 HS-SCCH或 E-AGCH后, 需要根据码域资源起点 ( Code_start )、 码域资源粒度( Code_unit, 每个 UE占用多少个 SF16码道)、 组内成员个数 N、 每个时隙 的用户个数 K、 UE的组内标识(UE_Id )、 时域资源 (HS-PDSCH或 E-PUCH )起点时隙、 组调度 HS-SCCH或 E-AGCH生效时间 T就可以确定 UE使用的时域和频域资源。 时域资 源粒度是 1个时隙。
其中, Code_start、 Code unit, 组内成员个数 N、 每个时隙的用户个数 K、 时域资源 起点时隙、 组调度 HS-SCCH或 E-AGCH生效时间 T可以由 RRC信令携带, 也可以由物 理控制信道 HS-SCCH或 E-AGCH携带。 UE的组内标识由 RRC信令携带,或签约时确定。
需要说明的是, 如果釆用汇聚定时器方式, 组内成员个数 N 只能由物理控制信道 HS-SCCH/E-AGCH携带。
UMTS和: LTE不同的是, 组调度的资源分配如果是通过 RRC信令通知, 则 NodeB还 需要将组调度的资源分配通过 BAP消息通知 RNC , RNC再通过 RRC信令通知 UE; 组 调度的资源分配如果是通过物理层控制信道 HS-SCCH/E-AGCH通知,则 NodeB直接发送, 不需要和 RNC的交互。
UMTS组调度资源分配示意图和图 4类似, 只是将频域变为码域。
在本发明实施例中, 涉及到的终端建立通信连接时需要通知接入网设备支持组调度的 指示, 有时还需要通知接入网设备组标识, 从而请求组调度, 网络获知该信息并判决进行 组调度后, 才可以在后续的处理中釆用本发明实施例提供的针对组通信的有别于针对单个 终端通信的处理方法。 此处以 LTE系统为例, 给出几种方法, 但具体的组调度请求的通知 方法不限于以下几种:
方法 1 , 在 RRCConnectionRequest ( RRC连接请求) 消息中增加信息元素: 支持组调 度的指示 groupConnection(组连接 ),此时 InitialUE-Identity(原始终端标识)中 randomValue (随机值 )代表业务特征标识 Group ID (组标识)。
具体实现方式为:
RRCConnectionRequest message
- ASM START
RRCConnectionRequest : := SEQUENCE {
criticalExtensions CHOICE {
rrcConnectionRequest-r8 RRCConnectionRequest-r8-IEs. criticalExtensionsFuture SEQUENCE { }
RRCConnectionRequest-r8-IEs SEQUENCE {
ue-Identity InitialUE-Identity,
establishmentCause EstablishmentCause,
spare BIT STRING (SIZE (1))
InitialUE-Identity CHOICE
s-TMSI S-TMSI,
randomValue BIT STRING (SIZE (40))
EstablishmentCause ENUMERATED {
emergency, highPriority Access, mt-Access. mo-Signalling.
mo-Data, delay TolerantAccess-vl 020, groupConnection, spare 1 }
-- ASN1 STOP
方法 2 ,在 RRCConnectionSetupComplete ( RRC连接建立完成)消息中增加信息元素, 组标识 Group ID。
具体实现方式为:
RRCConnectionSetup Complete message
-- ASM START RRCConnectionSetupComplete : := SEQUENCE {
rrc-Transactionldentifier RRC-Transactionldentifier,
criticalExtensions CHOICE {
cl CHOICEj
rrcConnectionSetupComplete-r8 RRCConnectionSetupComplete-r8-IEs, spare3 NULL, spare2 NULL, spare 1 NULL
criticalExtensionsFuture SEQUENCE {}
RRCConnectionSetupComplete-: ::= SEQUENCE {
selectedPLMN-Identity INTEGER (1 .6),
registeredMME RegisteredMME
OPTIONAL,
dedicatedlnfoNAS DedicatedlnfoNAS,
nonCriticalExtension RRCConnectionSetupComplete-v8a0-IEs
OPTIONAL
RRCConnectionSetupComplete-v8a0-IEs ::= SEQUENCE {
lateNonCriticalExtension OCTET STRING OPTIONAL nonCriticalExtension RRCConnectionSetupComplete-vl020-IEs
OPTIONAL
RRCConnectionSetupComplete-vl020-IEs ::= SEQUENCE {
gummei-Type-rlO ENUMERATED {native, mapped}
OPTIONAL,
rlf-InfoAvailable-rlO ENUMERATED {true}
OPTIONAL,
logMeasAvailable-rlO ENUMERATED {tme}
OPTIONAL,
rn- SubframeConfigReq-r 10 ENUMERATED {required, notRequired}
OPTIONAL,
nonCriticalExtension RRCConnectionSetupComplete-vxy-IEs
OPTIONAL
RRCConnectionSetupComplete-vxy-IEs ::= SEQUENCE {
group-Id-rx BIT STRING (SIZE (40)) OPTIONAL
nonCriticalExtension SEQUENCE {}
OPTIONAL
RegisteredMME:: SEQUENCE {
plmn-Identity PLMN-Identity
OPTIONAL,
mmegi BIT STRING (SIZE (16)>
mmec MMEC
- ASM STOP
方法 3 , 通过随机接入时的 preamble (前置码)进行判断。 具体而言该方法可以为支 持组调度的终端分配一个或一些专用的 preamble, eNB可基于终端随机接入过程中使用的 preamble来判断该次连接建立是否为组调度请求;
方法 4, 在 RRCConnectionRequest或 RRCConnectionSetupComplete等上行 RRC消息 中增加信息元素表示该次连接建立请求为组调度请求, eNB向核心网查询获得组标识。
需要说明的是, 除方法 3外, 上述方法也同样适用于 UMTS。
对于 LTE 系统, 接入网设备将 UE分到调度组后, 需要将组调度的资源分配通知给 UE, 此时, 可以通过 RRC信令通知, 也可以通过物理层控制信道 PDCCH通知。
对于 RRC信令, 所通知的资源分配内容可以包括如表 1所示的全部或者部分内容:
LTE系统中 RRC信令所通知资源分配内容
内容 指示方式
组 RNTI ( Group C-RNTI ) 网络建立调度组时分配,整数或者用 2进制比特表示 频域资源起点 PRB_start 整数或者用 2进制比特表示
频域资源粒度 PRB unit 整数或者用 2进制比特表示
组内成员个数 N 仅在汇聚计数方法指示, 汇聚定时方法不指示
整数或者用 2进制比特表示
每个子帧调度的用户个数 K 整数或者用 2进制比特表示
组内标识 UE_Id 仅在动态分组方式使用, 签约固定分组方式不指示, 整数或者用 2进制比特表示
组调度 PDCCH生效时间 T 整数或者用 2进制比特表示
对于 PDCCH, 通知的资源分配内容可以包括如表 2所示的全部或者部分内容:
表 2 LTE系统中 PDCCH所通知资源分配内容
对于 RRC信令, 通知的资源分配内容可以包括如表 3所示的全部或者部分内容: 表 3 UMTS系统中 RRC信令所通知资源分配内容
假设频域资源起点 PRB_start=10, 频域资源粒度 PRB_unit=2, 组内成员个数 N=100, 每个子帧调度的用户数 K=10, 组调度生效时间 Τ=30
则一次调度完所有用户需要 η = Ν/Κ =10个子帧, 在生效时间内可以对所有用户调度 Τ/η=3次
根据公式( M mod n ) * K+ j = i ( M个子帧第 j个频段(频域位置为 PRB_start + j * PRB unit )分配给第 i个用户), 可以计算出:
从起始子帧开始的第 0个子帧(即起始子帧)第 3个频段(频域位置 PRB编号为 10 +
3 * 2 = 16, 资源长度为 PRB_unit=2 )分配的用户组内标识为 0 + 3=3 ;
从起始子帧开始的第 17个子帧第 3个频段(频域位置 PRB编号为 10 + 3 * 2 = 16, 资 源长度为 PRB_unit=2 )分配的用户组内标识为 ( 17 mod 10 ) * 10 + 3 =73 ;
对组内标识为 73的用户而言, 还可以得出在生效时间内, 起始子帧开始的第 7, 17, 27个子帧的第 3个频段(频域位置 PRB编号为 16, 长度为 2个 PRB )获得调度。
本发明实施例还相应提供一种组调度装置, 如图 5所示, 包括:
确定单元 501 , 用于确定建立通信连接的终端的特性组标识, 特性组标识为在签约时 才艮据终端的特性分配给终端的标识;
划分单元 502 , 用于根据特性组标识, 将终端划分到特性组标识对应的调度组中; 调度单元 503 , 用于确定调度组完成汇聚, 且调度组中的终端全部完成通信连接的建 立后, 对该调度组进行组调度。
其中, 划分单元 502还用于:
根据特性组标识,将终端划分到特性组标识对应的调度组中后,确定终端的组内标识; 调度单元对该调度组进行组调度, 具体包括:
接入网设备根据调度组内各终端的组内标识, 对该调度组进行组调度。
划分单元 502确定终端的组内标识, 具体包括:
为该终端分配一个在该调度组内有效的组内标识; 或者
将该终端在签约时约定的组内标识确定为终端在该调度组内的组内标识。
调度单元 503确定调度组完成汇聚, 具体包括:
确定调度组中的终端数目达到预先设定的数目阈值, 数目阈值根据网络负荷确定, 或 者数目阈值为调度组的签约成员数目; 和 /或
确定调度组的建立时间达到预先设定的时间阈值。
调度单元 503对该调度组进行组调度, 具体包括:
为调度组分配资源, 并在资源上实现与调度组内终端的数据传输。
调度单元 503为调度组分配资源, 具体包括:
通过时分和频分联合或者通过时分和码分连接的方式为调度组分配资源。
调度单元 503还用于:
为调度组分配资源后, 通过高层公共信令或者通过物理层控制信令通知调度组所分配 的资源。
在通用移动通信系统 UMTS网络中,调度单元 503通过高层公共信令通知调度组所分 配的资源, 具体包括:
接收到无线网络控制器 RNC发送的携带调度组标识的调度请求消息;
将所分配的资源通知给 RNC,并由 RNC通过高层公共信令通知调度组所分配的资源; 接收 RNC返回的携带调度组标识的调度响应消息;
或者
向基站发送携带调度组标识的调度请求消息;
接收基站通知的分配的资源后, 通过高层公共信令通知调度组所分配的资源; 向基站返回携带调度组标识的调度响应消息。
如图 6所示, 本发明实施例提供的接入网设备包括:
第一处理器 601 , 用于确定建立通信连接的终端的特性组标识, 特性组标识为在签约 时才 居终端的特性分配给终端的标识; 据特性组标识, 将终端划分到特性组标识对应的 调度组中;
第二处理器 602, 用于确定调度组完成汇聚, 且调度组中的终端全部完成通信连接的 建立后, 对该调度组进行组调度。
其中, 第一处理器 601还用于:
根据特性组标识,将终端划分到特性组标识对应的调度组中后,确定终端的组内标识; 调度单元对该调度组进行组调度, 具体包括:
接入网设备根据调度组内各终端的组内标识, 对该调度组进行组调度。
第一处理器 601确定终端的组内标识, 具体包括:
为该终端分配一个在该调度组内有效的组内标识; 或者
将该终端在签约时约定的组内标识确定为终端在该调度组内的组内标识。
第二处理器 602确定调度组完成汇聚, 具体包括:
确定调度组中的终端数目达到预先设定的数目阈值, 数目阈值根据网络负荷确定, 或 者数目阈值为调度组的签约成员数目; 和 /或
确定调度组的建立时间达到预先设定的时间阈值。
第二处理器 602对该调度组进行组调度, 具体包括:
为调度组分配资源, 并在资源上实现与调度组内终端的数据传输。
第二处理器 602为调度组分配资源, 具体包括:
通过时分和频分联合或者通过时分和码分连接的方式为调度组分配资源。
第二处理器 602还用于:
为调度组分配资源后, 通过高层公共信令或者通过物理层控制信令通知调度组所分配 的资源。
在通用移动通信系统 UMTS网络中,调度单元 503通过高层公共信令通知调度组所分 配的资源, 具体包括:
接收到无线网络控制器 RNC发送的携带调度组标识的调度请求消息;
将所分配的资源通知给 RNC ,并由 RNC通过高层公共信令通知调度组所分配的资源; 接收 RNC返回的携带调度组标识的调度响应消息;
或者
向基站发送携带调度组标识的调度请求消息;
接收基站通知的分配的资源后, 通过高层公共信令通知调度组所分配的资源; 向基站返回携带调度组标识的调度响应消息。
实际应用中一个特性组的 MTC设备很可能分散在多个小区, 导致一个小区没有覆盖 这个特性组所有的 MTC设备, 若要在一个小区下进行组调度, 需要考虑分组方式, 本发 明实施例通过动态分组或者签约分组的方式, 解决了如何确定成员个数和每个成员的组内 标识如何确定的问题; 本发明实施例进一步提供了时分和频分联合或者时分和码分联合的 资源分配方法, 提高了系统资源利用率。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
Claims
1、 一种组调度方法, 其特征在于, 包括:
接入网设备确定建立通信连接的终端的特性组标识, 其中所述特性组标识为在签约时 才艮据所述终端的特性分配给所述终端的标识;
所述接入网设备根据所述特性组标识, 将所述终端划分到所述特性组标识对应的调度 组中;
所述接入网设备确定所述调度组完成汇聚, 且所述调度组中的终端全部完成通信连接 的建立后, 对该调度组进行组调度。
2、 如权利要求 1 所述的方法, 其特征在于, 所述接入网设备根据所述特性组标识, 将所述终端划分到所述特性组标识对应的调度组中后, 还包括:
所述接入网设备确定所述终端的组内标识;
所述接入网设备对该调度组进行组调度, 具体包括:
所述接入网设备根据所述调度组内各终端的组内标识, 对该调度组进行组调度。
3、 如权利要求 2 所述的方法, 其特征在于, 所述接入网设备确定所述终端的组内标 识, 具体包括:
所述接入网设备为该终端分配一个在该调度组内有效的组内标识; 或者
所述接入网设备将该终端在签约时约定的组内标识确定为所述终端在该调度组内的 组内标识。
4、 如权利要求 1 所述的方法, 其特征在于, 所述接入网设备确定所述调度组完成汇 聚, 具体包括:
所述接入网设备确定所述调度组中的终端数目达到预先设定的数目阈值, 所述数目阈 值根据网络负荷确定, 或者所述数目阈值为所述调度组的签约成员数目; 和 /或
所述接入网设备确定所述调度组的建立时间达到预先设定的时间阈值。
5、 如权利要求 1所述的方法, 其特征在于, 所述接入网设备对该调度组进行组调度, 具体包括:
所述接入网设备为所述调度组分配资源, 并在所述资源上实现与所述调度组内终端的 数据传输。
6、 如权利要求 5所述的方法, 其特征在于, 所述接入网设备为所述调度组分配资源, 具体包括:
所述接入网设备通过时分和频分联合或者通过时分和码分连接的方式为所述调度组 分配资源。
7、 如权利要求 5 所述的方法, 其特征在于, 所述接入网设备为所述调度组分配资源 后, 还包括:
所述接入网设备通过高层公共信令或者通过物理层控制信令通知所述调度组所分配 的资源。
8、 如权利要求 7所述的方法, 其特征在于, 在 UMTS网络中, 所述接入网设备具体 为基站时, 所述接入网设备通过高层公共信令通知所述调度组所分配的资源, 具体包括: 所述基站接收到无线网络控制器 RNC发送的携带调度组标识的调度请求消息; 所述基站将所分配的资源通知给所述 RNC, 并由所述 RNC通过高层公共信令通知所 述调度组所分配的资源;
所述基站接收所述 RNC返回的携带调度组标识的调度响应消息;
或者,
所述接入网设备具体为 RNC 时, 所述接入网设备通过高层公共信令通知所述调度组 所分配的资源, 具体包括:
所述 RNC向基站发送携带调度组标识的调度请求消息;
所述 RNC接收所述基站通知的分配的资源后, 通过高层公共信令通知所述调度组所 分配的资源;
所述 RNC向基站返回携带调度组标识的调度响应消息。
9、 如权利要求 7所述的方法, 其特征在于, 在 LTE网络中, 通过时分和频分联合的 方式为所述调度组分配资源,所述高层公共信令中包括:组小区无线网络临时标识 C-RNTI、 频域资源起点、 频域资源粒度、 组内成员个数、 每个子帧调度的终端个数、 终端的组内标 识、 组调度物理下行控制信道 PDCCH生效时间;
在 UMTS网络中, 通过时分和码分联合的方式为所述调度组分配资源, 所述高层公共 信令中包括: 组高速下行共享信道无线网络临时标识 H-RNTI或组增强专用信道无线网络 临时标识 E-RNTI、 码域资源起点、 码域资源粒度、 组内成员个数、 每个时隙对应的终端 个数、终端的组内标识、 时域资源高速下行物理共享信道 HS-PDSCH或增强上行物理信道 E-PUCH的起点时隙、 组调度高速下行共享信道的共享控制信道 HS-SCCH或增强专用信 道的绝对许可信道 E-AGCH生效时间;
在 LTE网络中, 通过时分和频分联合的方式为所述调度组分配资源, 所述物理层控制 信令中包括: 频域资源起点、 频域资源粒度、 组内成员个数、 每个子帧调度的终端个数、 组调度 PDCCH生效时间;
在 UMTS网络中, 通过时分和码分联合的方式为所述调度组分配资源, 所述物理层控
制信令中包括: 码域资源起点、码域资源粒度、 组内成员个数、每个时隙对应的终端个数、 时域资源 HS-PDSCH或 E-PUCH起点时隙、 组调度 HS-SCCH或 E-AGCH生效时间。
10、 一种组调度装置, 其特征在于, 包括:
确定单元, 用于确定建立通信连接的终端的特性组标识, 所述特性组标识为在签约时 # ^据所述终端的特性分配给所述终端的标识;
划分单元, 用于根据所述特性组标识, 将所述终端划分到所述特性组标识对应的调度 组中;
调度单元, 用于确定所述调度组完成汇聚, 且所述调度组中的终端全部完成通信连接 的建立后, 对该调度组进行组调度。
11、 如权利要求 10所述的装置, 其特征在于, 所述划分单元还用于:
根据所述特性组标识, 将所述终端划分到所述特性组标识对应的调度组中后, 确定所 述终端的组内标识;
所述调度单元对该调度组进行组调度, 具体包括:
所述接入网设备根据所述调度组内各终端的组内标识, 对该调度组进行组调度。
12、如权利要求 11所述的装置,其特征在于,所述划分单元确定所述终端的组内标识, 具体包括:
为该终端分配一个在该调度组内有效的组内标识; 或者将该终端在签约时约定的组内 标识确定为所述终端在该调度组内的组内标识。
13、 如权利要求 10 所述的装置, 其特征在于, 所述调度单元确定所述调度组完成汇 聚, 具体包括:
确定所述调度组中的终端数目达到预先设定的数目阈值, 所述数目阈值根据网络负荷 确定, 或者所述数目阈值为所述调度组的签约成员数目; 和 /或
确定所述调度组的建立时间达到预先设定的时间阈值。
14、 如权利要求 10所述的装置, 其特征在于, 所述调度单元对该调度组进行组调度, 具体包括:
为所述调度组分配资源, 并在所述资源上实现与所述调度组内终端的数据传输。
15、 如权利要求 14所述的装置, 其特征在于, 所述调度单元为所述调度组分配资源, 具体包括:
通过时分和频分联合或者通过时分和码分连接的方式为所述调度组分配资源。
16、 如权利要求 14所述的装置, 其特征在于, 所述调度单元还用于:
为所述调度组分配资源后, 通过高层公共信令或者通过物理层控制信令通知所述调度
组所分配的资源。
17、 如权利要求 16所述的装置, 其特征在于, 在通用移动通信系统 UMTS网络中, 所述调度单元通过高层公共信令通知所述调度组所分配的资源, 具体包括:
接收到无线网络控制器 RNC发送的携带调度组标识的调度请求消息; 将所分配的资 源通知给所述 RNC, 并由所述 RNC通过高层公共信令通知所述调度组所分配的资源; 接 收所述 RNC返回的携带调度组标识的调度响应消息; 或者
向基站发送携带调度组标识的调度请求消息; 接收所述基站通知的分配的资源后, 通 过高层公共信令通知所述调度组所分配的资源; 向基站返回携带调度组标识的调度响应消 息。
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