WO2014153785A1 - 一种cbs消息的调度方法和装置 - Google Patents

一种cbs消息的调度方法和装置 Download PDF

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Publication number
WO2014153785A1
WO2014153785A1 PCT/CN2013/073504 CN2013073504W WO2014153785A1 WO 2014153785 A1 WO2014153785 A1 WO 2014153785A1 CN 2013073504 W CN2013073504 W CN 2013073504W WO 2014153785 A1 WO2014153785 A1 WO 2014153785A1
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Prior art keywords
scheduling
message
bandwidth
period
cbs
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PCT/CN2013/073504
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English (en)
French (fr)
Inventor
徐海东
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380003407.3A priority Critical patent/CN103875296B/zh
Priority to PCT/CN2013/073504 priority patent/WO2014153785A1/zh
Publication of WO2014153785A1 publication Critical patent/WO2014153785A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for scheduling a CBS message. Background technique
  • CBS Cell Broadcast Service
  • CBS is a point-to-multipoint multicast service similar to the nature of text broadcasting in television. It provides a certain number of broadcast messages in a non-confirmed manner in a designated geographic area. The function of regional broadcasting.
  • 3GPP defines the protocol structure of the CBS service in the UMTS Terrestrial Radio Access Network (UTRAN) network. According to the 3GPP protocol, the Radio Network Controller (RNC), (BMC, Broadcast/Multicast) Control) Module scheduling, sent on the Common Traffic Channel (CTCH).
  • RNC Radio Network Controller
  • BMC Broadcast/Multicast
  • CCH Common Traffic Channel
  • the unit for transmitting messages on the CTCH channel is CTCH Block Set (CTCH BS), and the CBS message is composed of one or more CTCH BSs.
  • CTCH BS CTCH Block Set
  • the BMC module sends a BMC scheduling message in addition to the normal CBS message in the CBS scheduling period.
  • the BMC scheduling message is also composed of one or more CTCH BSs.
  • the BMC scheduling information includes the message identifier, the most recently updated CB message, and the location information of the BMC scheduling information CTCH BS of the next scheduling period. Once the UE knows this information, it only needs to receive the CBS message at a specific time, and it is not necessary to receive and interpret each CTCH BS.
  • the length of the BMC scheduling message itself is not fixed, but the number of CTCH BSs allocated by the system for the BMC scheduling message is fixed. Therefore, the UE always needs to read a fixed length CTCH BS. At this time, most of the UEs read are invalid CTCH BSs, which will cause the UE to consume a lot of power.
  • the embodiment of the present invention provides a method and a device for scheduling a CBS message, which reduces the power consumption of the UE to monitor the CBS message by dynamically adjusting the bandwidth occupied by the scheduling message.
  • the embodiment of the present invention uses the following technical solutions:
  • the first aspect provides a scheduling method for a CBS message, including: At the start of the first scheduling period, if at least one CBS message needs to be sent in a subsequent scheduling period, the first scheduling bandwidth is obtained; the first scheduling bandwidth is delivered in the first scheduling period. The maximum bandwidth that can be used by scheduling messages;
  • the first scheduling message sent in the first scheduling period is set according to the bandwidth that is required to be sent by the first CBS message in the second scheduling period.
  • a scheduling message points directly or indirectly to the second scheduling period.
  • the bandwidth that is required to be sent by the first CBS message in the second scheduling period is set in the limitation of the first scheduling bandwidth.
  • the first scheduling message sent by the first scheduling period includes: obtaining, according to at least a bandwidth required to send the first CBS message in the second scheduling period, obtaining a scheduling message directly directed to the second scheduling period Dispatching a bandwidth; if the scheduling bandwidth required for the scheduling message directly directed to the second scheduling period is less than or equal to the first scheduling bandwidth, setting a scheduling message directly directed to the second scheduling period as the first Or scheduling the message; or, if the scheduling bandwidth of the scheduling message directly directed to the second scheduling period is greater than the first scheduling bandwidth, at least according to the scheduling of the scheduling message directly directed to the second scheduling period Bandwidth, obtaining a scheduling bandwidth required to directly point to the scheduling message of the third scheduling period; the third scheduling period is the second scheduling period A scheduling period; in the case where the second scheduling bandwidth is smaller than or equal to the first scheduled bandwidth, provided directly to the third scheduling message scheduling period as the first scheduling message.
  • the first scheduling message sent in the first scheduling period is set according to at least a bandwidth required to send the first CBS message in the second scheduling period.
  • the method includes: setting a length of a CBS scheduling period, a new message bit bitmap, and a message describing three cells in a first scheduling message according to a bandwidth occupied by each valid message to be delivered in a next scheduling period of the first scheduling period;
  • the bandwidth occupied by the valid message includes: a bandwidth occupied by the scheduling message, and a reserved high The bandwidth of the priority CBS message and the bandwidth occupied by the CBS message; or the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, the bandwidth occupied by the CBS message, and does not include the reservation to the high priority CBS message.
  • the bandwidth occupied by the scheduling message to be delivered in the next scheduling period of the first scheduling period is obtained by at least the bandwidth required to deliver the first CBS message in the second scheduling period.
  • the setting is performed in the first scheduling period.
  • the first scheduling message further includes: setting a sum of bandwidths of each valid information to be delivered in the first scheduling period as a value of a cell of a CTCH BS start offset index in the first scheduling message.
  • the method further includes: at a start time of the first scheduling period, if there is no CBS message to be delivered, within a limit of the preset scheduling bandwidth, at least according to the limitation
  • the preset scheduling bandwidth is configured to set a first scheduling message, where the preset scheduling bandwidth is smaller than a maximum possible bandwidth of the scheduling message.
  • the setting, by the at least one of the preset scheduling bandwidths, the first scheduling message includes: sending the next scheduling period according to the first scheduling period
  • the bandwidth of each valid message, the CBS scheduling period length, the new message bit bitmap, and the message description in the first scheduling message are set.
  • the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message.
  • the bandwidth reserved for the high-priority CBS message; or the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, and does not include the bandwidth reserved for the high-priority CBS message;
  • the bandwidth occupied by the scheduling message to be delivered in a scheduling period is the preset scheduling bandwidth.
  • the second aspect provides an apparatus for scheduling a CBS message, including: an acquiring unit: configured to: at a start time of a first scheduling period, if at least one CBS message needs to be delivered in a scheduling period after the acquiring, a scheduling bandwidth; the first scheduling bandwidth is a maximum bandwidth that can be occupied by a scheduling message sent in the first scheduling period; a first setting unit, configured to set a bandwidth that is sent in the first scheduling period, according to a bandwidth that is required to be sent by the first CBS message in the second scheduling period, within a limit of the first scheduling bandwidth.
  • a scheduling message the first scheduling message directly or indirectly pointing to the second scheduling period.
  • the first setting unit is specifically configured to: directly obtain, according to a bandwidth required to send the first CBS message in the second scheduling period, directly Scheduling bandwidth required for the scheduling message of the second scheduling period; if the scheduling bandwidth required for the scheduling message directly directed to the second scheduling period is less than or equal to the first scheduling bandwidth, the setting directly points to the The scheduling message of the second scheduling period is used as the first scheduling message; or, if the scheduling bandwidth of the scheduling message directly directed to the second scheduling period is greater than the first scheduling bandwidth, at least according to the direct pointing location
  • the scheduling bandwidth of the scheduling message of the second scheduling period is obtained, and the scheduling bandwidth required for the scheduling message directly directed to the third scheduling period is obtained; the third scheduling period is the last scheduling period of the second scheduling period; When the third scheduling bandwidth is less than or equal to the first scheduling bandwidth, setting a scheduling cancellation directly directed to the third scheduling period As the first scheduling message.
  • the first setting unit is specifically configured to: set a bandwidth according to a bandwidth of each valid message to be delivered according to a next scheduling period of the first scheduling period
  • the CBS scheduling period length, the new message bit bitmap, and the message description in the scheduling message wherein the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, reserved for the high priority CBS message.
  • Bandwidth, the bandwidth occupied by the CBS message; or the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, the bandwidth occupied by the CBS message, and the bandwidth reserved for the high priority CBS message;
  • the scheduling message to be delivered in the next scheduling period of the first scheduling period occupies at least the first CBS message in the second scheduling period. The bandwidth required is obtained.
  • the first setting unit is specifically configured to: set a sum of bandwidths of each valid information that is required to be sent in the first scheduling period, The value of this cell is indexed for the CTCH BS start offset in the first scheduling message.
  • the device further includes: a second setting unit, where the second setting unit is configured to: at a start time of the first scheduling period, if there is no need to exist The sent CBS message sets the first scheduling message according to the preset scheduling bandwidth, and the preset scheduling bandwidth is smaller than the maximum possible bandwidth of the scheduling message.
  • the second setting unit is specifically configured to: allocate, according to the next scheduling period of the first scheduling period, each valid message that is to be delivered according to the fourth possible implementation manner.
  • Bandwidth set the length of the CBS scheduling period, the new message bit bitmap, and the message description in the first scheduling message; wherein the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, reserved for high priority The bandwidth of the CBS message; or the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, and does not include the bandwidth reserved for the high priority CBS message; the next scheduling period of the first scheduling period needs to be delivered
  • the bandwidth occupied by the scheduling message is the preset scheduling bandwidth.
  • a scheduling apparatus for a CBS message including: a memory and a processor connected to the memory; wherein the memory stores a set of program codes, and the processor is configured to invoke the memory Stored program code, perform any of the above methods.
  • the method and device for scheduling a CBS message at least at the beginning of the first scheduling period, if at least one CBS message is to be delivered in a subsequent scheduling period, at least Setting a first scheduling message sent in the first scheduling period according to a bandwidth that is required to be sent by the first CBS message in the second scheduling period; the first scheduling message directly or indirectly pointing to the second scheduling Cycle; that is, how much bandwidth is needed to point to the second scheduling period, and adaptively adjust the bandwidth of the first scheduling message.
  • the bandwidth occupied by the scheduling message the power consumption of the UE to monitor the CBS message is reduced, and the standby time of the mobile phone is increased.
  • FIG. 1 is a schematic flowchart of a scheduling method for a CBS message to be delivered in a scheduling period after a first scheduling period according to the present invention
  • FIG. 2 is a schematic flowchart of a scheduling method for a CBS message that is not required to be delivered in a scheduling period after the first scheduling period, and is not provided by the present invention
  • FIG. 3 is a schematic diagram of each scheduling period obtained by using the scheduling method provided by the present invention
  • FIG. 4 is a schematic diagram of each scheduling period obtained by using the scheduling method provided by the present invention
  • FIG. 5 is a flowchart obtained by using the scheduling method provided by the present invention
  • FIG. 6 is a schematic diagram of each scheduling period obtained by using the scheduling method provided by the present invention
  • FIG. 8 is a schematic diagram of a scheduling apparatus for a CBS message according to an embodiment of the present invention
  • a schematic diagram of another scheduling device for CBS messages are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the execution entity of the method is exemplified by a BMC, which is a module for processing a CBS message sent by a CBS server on a radio network controller (RNC, Ra dio Ne twor k Controller).
  • RNC radio network controller
  • the BMC After the BMC receives the WRITE-REPLACE message sent by the CBS server, the BMC saves the received CBS message in the cache and waits for scheduling.
  • the BMC sends the received CBS message to the UE, and after receiving the feedback successfully received by the UE, the BMC will reply the WRITE-REPLACE COMPLETE message to the CBS server.
  • the CBS message and its scheduling message are sent on the CTCH channel.
  • the unit for transmitting messages on the CTCH channel is CTCH B ock Se t (CTCH BS), and the number of CTCH BSs is the occupied bandwidth.
  • CTCH BS CTCH B ock Se t
  • a CBS message consists of one or more CTCH BSs and all block transfers must be completed in one CBS scheduling cycle.
  • the CBS scheduling period consists of up to 256 CTCH BSs.
  • the BMC module includes the BMC scheduling message in addition to the CBS message in the CBS scheduling period. For convenience, it is simply referred to as the scheduling message.
  • the scheduling message is also composed of one or more CTCH BSs.
  • the number of b i t corresponding to each CTCH BS is related to the specific device. Once the device is determined, the relationship between the two is determined. For example, if one CTCH BS corresponds to 168b i t , the 8b i t occupied by the message header is removed, corresponding to 160b i t , 20byte.
  • a method for scheduling a CBS message according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings. As shown in Figure 1, if at any one of the scheduling periods (called the first scheduling period), it is expected that at least one CBS message, that is, any scheduling period (called the first scheduling), needs to be sent in the subsequent scheduling period. At the beginning of the period, the BMC cache contains one or more CBS messages waiting to be scheduled in the order of reception. The BMC does the following:
  • the first scheduling bandwidth is the maximum bandwidth that can be occupied by the scheduling message sent in the first scheduling period, and is predicted by the scheduling message of the previous period of the first scheduling period.
  • the first scheduling message sent in the first scheduling period is set according to the bandwidth required by the first CBS message sent in the second scheduling period, where the first scheduling message is sent.
  • the message directly or indirectly points to the second scheduling period; the second scheduling period is The period during which the first CBS message is actually delivered.
  • the meaning of the first scheduling message directly or indirectly pointing to the second scheduling period is that the first scheduling message directly or indirectly predicts each valid information sent by the second scheduling period and the bandwidth occupied by each valid information.
  • the valid information refers to information that needs to be read by the UE in one scheduling period.
  • the maximum bandwidth that can be occupied by the scheduling message (the first scheduling message) of the first scheduling period is limited by the first scheduling bandwidth, firstly, at least according to the bandwidth required to deliver the first CBS message in the second scheduling period, Directly pointing to the scheduling bandwidth required for the scheduling message of the second scheduling period; secondly, optionally, the scheduling bandwidth required for the scheduling message directly directed to the second scheduling period is less than or equal to the first scheduling bandwidth
  • the scheduling message that directly points to the second scheduling period is set as the first scheduling message.
  • the scheduling bandwidth of the scheduling message directly directed to the second scheduling period is greater than the first scheduling.
  • the scheduling bandwidth required to directly point to the scheduling message of the third scheduling period is obtained according to the scheduling bandwidth of the scheduling message that directly points to the second scheduling period; the third scheduling period is a previous scheduling period of the second scheduling period; where the third scheduling bandwidth is less than or equal to the first scheduling bandwidth Provided directly to the third scheduling message scheduling period as the first scheduling message.
  • the S20 sets the first scheduling message according to the preset scheduling bandwidth, within a limit of the preset scheduling bandwidth.
  • the preset scheduling bandwidth is smaller than a maximum possible bandwidth of the scheduling message. Due to existing In the technology, the number of CTCH BSs allocated by the system for the scheduling message is fixed, and the number of CTCH BSs is configured according to the maximum possible scheduling message length. In the embodiment of the present invention, the preset scheduling bandwidth is smaller than the maximum possible bandwidth of the configuration. . Of course, you can choose a smaller value based on actual needs.
  • the bandwidth of the scheduling message to be delivered in the next scheduling period is determined to use the preset scheduling bandwidth, so at least according to the preset Scheduling bandwidth, setting the first scheduling message. Moreover, the scheduling bandwidth of the first scheduling message is limited by a preset scheduling bandwidth.
  • S202 Send the first scheduling message to a terminal.
  • the bandwidth occupied by the scheduling message of each scheduling period is set to a default smaller value, which reduces the power consumption of the CBS message monitored by the UE in the idle state, and increases the standby of the mobile phone. time.
  • the format of the above scheduling message is shown in the following table:
  • Message Type Message type, BMC scheduling message is fixed to 2. This cell must be selected.
  • Offset to Begin CTCH BS Index The offset of the first CTCH BS sequence number of the next CBS scheduling period relative to the corresponding BMC scheduling message (located in the current CBS scheduling period).
  • Binary code range 1..255. This cell must be selected.
  • Length of CBS Scheduling Period The continuity of the next CBS scheduling period The length of the number of the CTCH BS serial number. Together with the Offset to Begin CTCH-BS Index parameter, the start and end points of the next CBS scheduling period are determined. Binary code, range 1..256. This cell must be selected.
  • New CBS Message Bitmap A bitmap of the new CBS message. Each bit identifies a CTCH BS block in the scheduling period. If the UE is required to receive the CTCH BS, the bitmap is set. The bitmap length is determined by the Length of CBS Scheduling Period. This cell must be selected.
  • BMC Schedule Message Extension Additional extension information, this cell is optional.
  • the present invention also provides an embodiment for describing the scheduling process of the CBS message in detail.
  • the high-priority CBS message is supported, and the bandwidth occupied by the entire CBS scheduling period is fixed to 128CTCH BS as an example.
  • the system reserves the bandwidth for the high-priority CBS message.
  • 30 CTCH BSs are taken as an example, and a CBS message scheduling period is fixedly occupied by 128.
  • the CTCH BS is an example.
  • the scheduling period Schedule Period is called SP
  • the schedule message Schedule Message is SM.
  • the SP serial number in the following description is for convenience of illustration only and does not specifically refer to a certain scheduling period.
  • the SM in the SP is also numbered according to the corresponding scheduling period, and the SM in SP1 is denoted as SM1.
  • SP1 At the start time of SP1, there is no CBS message to be sent to the UE in the buffer of the BMC. Therefore, SM1 only needs to preview the valid message of the next scheduling period, that is, the SM and the bandwidth reserved for the high priority CBS message.
  • the number of CTCH BSs required by the SM can be set to a preset scheduling bandwidth, and the preset scheduling bandwidth is a default minimum preset scheduling bandwidth, and six CTCH BSs are taken as an example.
  • SM1 may be set according to S201; SM1 is sent to the UE according to S202.
  • the BMC also reserves the bandwidth of the high priority CBS message in SP1.
  • the actual length of the SMI is 44 bytes, as shown in the following table.
  • the value of the Message Type is fixed to 2 in this embodiment, indicating that it is a scheduling message of the BMC, so that the UE can know that the received information is used for scheduling or sending of the CBS message.
  • Offset to Begin CTCH BS index is 128, indicating that the offset of the first CTCH BS number that can be occupied by the next scheduling period (SP2) relative to the SM in the current CBS scheduling period (SP1) is 128, due to the implementation.
  • the length of the CBS scheduling period is fixed to 128 CTCH BSs, so the value of this cell in the SM is always 128.
  • the value of the length of the CBS Scheduling Period is 36, which is equal to the sum of the bandwidths of the valid messages sent by the SP2, that is, the six CTCH BSs that are delivered by the SM in SP2 and the 30 CTCH BSs that are reserved for the high priority. Sum. There is no CBS message to be scheduled at the start time of SP1. Therefore, it is considered that the SM sent in SP2 needs to occupy 6 CTCH BSs with preset scheduling bandwidth. This cell indicates the number length of the consecutive CTCH BS sequence numbers occupied by the next CBS scheduling period.
  • the Length of CBS Scheduling Period together with the Offset to Begin CTCH - BS Index determines the start and end points of the next CBS scheduling period.
  • Each bit represents a CTCH BS block in the next scheduling period (SP2). If the UE is required to receive the CTCH BS, the bitmap is set. The bitmap length is determined by the Length of CBS Scheduling Period. At this point, the Length of CBS Scheduling Period is equal to 36, so the first 36 bits are set to 1.
  • the BMC receives at least one CBS message sent by the CBS server, and the BMC sequentially stores them in the order of reception. In the cache, waiting for scheduling.
  • a CBS message is received as an example, and if a plurality of messages are received, it will be described in detail in the following embodiments.
  • the SM of the SP2 may be set by using the foregoing S101-102; at this time, the first scheduling period in the step S101-102 is SP2, if The SP of the SP2 is indirectly directed to the scheduling period (second scheduling period) in which the first CBS message needs to be delivered, and the second scheduling period is the SP4 in the figure; of course, it is possible that the SM of the SP2 directly points to the first delivery.
  • the scheduling period of the CBS messages, at which time the second scheduling period should be SP3 (this case is not shown in the figure).
  • the first scheduling period is SP2
  • the second scheduling period is SP4.
  • the bandwidth of the SM directly pointing to SP4 is greater than the maximum bandwidth available to the SM of the next scheduling period pointed by SM1. . It is assumed that the received CBS message needs to occupy 30 CTCH BSs, and is not a high priority CBS message, and is not sent in the emergency message reserved bandwidth.
  • the maximum bandwidth that can be occupied by SM2 is obtained, that is, the maximum bandwidth that SM2 can occupy from SM1, and the above six CTCH BSs are taken as an example.
  • At least the bandwidth required to issue the CBS message at SP4 is set at SM2.
  • the bandwidth required to send the CBS message to the SP4 according to the above assumption is 30 CTCH BSs, and at least according to the bandwidth of the CBS message, the scheduling band required for the SM directly pointing to the SP4 is obtained.
  • the SM directly pointing to SP4 is SM3.
  • the SM3 is used to predict the bandwidth occupied by each valid information in SP4, so it is actually necessary to determine the bandwidth required by each valid information in SP4.
  • the bandwidth occupied by the above effective information in this embodiment includes the bandwidth occupied by SM4, the bandwidth reserved for the high priority CBS message, and the bandwidth occupied by the above CBS message.
  • the bandwidth of SM3 can also be estimated in the embodiment of the present invention, and the estimated value can be used.
  • the estimated bandwidth of the SM3 may be obtained according to the bandwidth occupied by the CBS message, by way of calculation, or by way of a table lookup;
  • bandwidth occupied by the CBS message and the bandwidth reserved for the high priority CBS message for example, a more accurate estimation of the bandwidth occupied by the SM3 is obtained by means of calculation or table lookup;
  • the bandwidth occupied by the SM4 is obtained by using a calculation manner or a table lookup manner.
  • the exact value In general, the bandwidth occupied by SM4 is related to the effective information in the scheduling period after SP4, which is difficult to determine, and compared with the bandwidth reserved for high-priority CBS messages and the bandwidth occupied by CBS messages. The impact on the bandwidth occupied by SM3 is small.
  • the bandwidth occupied by the SM2 is obtained according to at least the SM3; since the bandwidth occupied by the SM3 and the bandwidth reserved for the high-priority CBS message are included in the SP3, the optional bandwidth may be only based on the SM3.
  • Bandwidth as an example, the estimated value of the bandwidth occupied by SM2 is obtained by means of calculation or by means of table lookup;
  • the estimated or accurate value of the bandwidth occupied by the SM2 is obtained by means of calculation or table lookup. Whether the bandwidth occupied by SM3 is an estimate or an exact value.
  • the BMC predicts in SM2 that the maximum number of CTCH BSs that SM3 can occupy is 24 CTCH BSs.
  • SM2 is as shown in Table 3, where the length of CBS Scheduling Period is set to SP3.
  • SP3 since SP3 still needs to be used.
  • the first CBS message is sent, so the bandwidth occupied by the CBS message is 0.
  • the cell New Message Bit map is set to the first 54bi t is 1.
  • each CTCH BS occupied by SM is represented by 6
  • the description information is lbyte
  • the high priority message (Read advised, recommended reading) is represented by 2 for each CTCH BS
  • the description information is lbyte.
  • the first scheduling period is SP2
  • the second scheduling period is SP3.
  • the bandwidth of the SM directly pointing to SP3 is less than or equal to the maximum available for the SM of the next scheduling period pointed by SM1. Bandwidth).
  • the maximum bandwidth that can be occupied is exemplified by the above six CTCH BSs.
  • At least the bandwidth required to issue the CBS message at SP4 is set at SM2.
  • the maximum bandwidth available for the periodic SM at this time set SM2 directly pointing to SP3.
  • SP2 is sent to the UE.
  • step S103 SP3 is transmitted to the UE.
  • SP4 Since it is expected that the CBS message needs to be sent in the subsequent scheduling period at the start time of the SP4, the SM4 can be set by using the above S101-102; at this time, the first scheduling period in the step S101-102 is SP4. Table 5 SM4
  • SM4 predicts that the maximum bandwidth occupied by SM5 is restored to the default minimum preset scheduling bandwidth of 6 CTCH BSs, so the Length of CBS Scheduling of SM4
  • SP4 is sent to the UE.
  • SP5 At the start time of the SP5, there is no CBS message to be sent to the UE in the buffer of the BMC, and the processing is the same as SP1, and details are not described herein again.
  • the present invention further provides another embodiment for describing the scheduling process of the CBS message in detail.
  • the BMC receives a CBS message in SP1 and sends it to the UE in SP4. That is to say, in the longest case, the BMC needs three CBS scheduling periods from the time when it wants to send a CBS message to the delay to send it to the UE.
  • this example shortens the partial CBS scheduling period and reduces the delay caused by the dynamic change of SM.
  • This embodiment supports a high-priority CBS message, and takes a CBS message as an example. If multiples are received, it will be detailed in the following embodiments.
  • the received CBS message needs to occupy 30 CTCH BSs, and is not a high priority CBS message, and is not sent in the emergency message reserved bandwidth.
  • the system reserves the bandwidth for the high-priority CBS message.
  • 30 CTCH BSs are taken as an example.
  • the first scheduling period is SP2
  • the second scheduling period is SP4.
  • the differences between the foregoing embodiments are only described in detail, and the details are not described again.
  • the length of SP2 is shortened to 36 CTCH BSs, which is equal to 30 CTCH BSs reserved for high priority CBS messages in the SMI.
  • the sum of the maximum 6 CTCH BSs occupied by SM2, that is, the SM0 cell tof set to Begin CTCH BS index is 36, SP2il No Message (abbreviated as No Msg).
  • the total length of SM2 is 30 bytes, which is less than 6 CTCH BSs.
  • the BMC predicts the above CB S message to the UE in the SM 3, that is, the SM 3 points to the SP 4 (the second scheduling period, the available maximum bandwidth of the SM3 is 24 CTCH BSs.
  • the SP 3 also Being shortened, the empty message part and the high priority CBS message reserved bandwidth are canceled, because it has been determined that the above CBS message is not a CBS message, and the bandwidth of the high priority CBS message is not reserved. Therefore, the SP 3 is only SM3, and the SP 3 is shortened.
  • 24 CTCH BSs as shown in Table 7, the cells of the SM3 are ffset to Beg in CTCH BS index of 24.
  • the actual length of the SM is 1 38 bytes, which is less than 6 CTCH BSs.
  • the present invention also provides an embodiment, which describes a scheduling process of a CBS message in detail.
  • the high-priority CBS message is cancelled, and the scheduling period is further shortened.
  • the CBS message delivery delay does not increase, even for high-priority messages, the entire scheduling. The process is shown in Figure 5.
  • This embodiment does not support the high-priority CBS message, and takes a CBS message as an example. It is assumed that the received CBS message needs to occupy 30 CTCH BSs. If multiples are received, it will be detailed in the following embodiments.
  • the first scheduling period is SP2, and the second scheduling period is SP4.
  • the differences between the foregoing embodiments are only described in detail, and the similarities are not repeated here:
  • the SM1 At the start time of the SP1, there is no CBS message to be sent to the UE in the BMC cache. Therefore, the SM1 only needs to preview the SM of the next scheduling period.
  • the number of CTCH BSs required by the SM can be set to a default. Minimum preset scheduling bandwidth. Since the high-priority CBS message reserved bandwidth is cancelled at this time, correspondingly, the portion of the SM reserved for the high-priority CBS message reserved bandwidth is also canceled, so the total length of the SM is also relatively small.
  • the SMI has a length of 5 bytes, less than 1 CTCH BS, SP1 is 128 CTCH BSs, and SP1 has an Offset to Begin CTCH BS index of 128.
  • the maximum bandwidth occupied by the SM3 is reported by the SM2.
  • the method for obtaining the maximum bandwidth is the same as the method described in the foregoing embodiment, and is not described here again. The difference is that the high-priority CBS message is cancelled.
  • the 24 CTCH BSs in the embodiment become 6 CTCH BSs.
  • SP2 only includes SM2, which occupies 1 CTCH BS, and the cell of SM2 Off set to Begin CTCH BS index is 1.
  • SM3 predicts the maximum bandwidth occupied by SM4.
  • SM3 occupies 6 CTCH BSs
  • SP3 only includes SM3
  • SP3's cell Offset to Begin CTCH BS index is 6.
  • the BMC retrieves the CBS message from the cache and sends it to the UE.
  • the length of SP4 is 128 CTCH BSs.
  • the SM4 cell Offset to Begin CTCH BS index is 128.
  • the present invention further provides another embodiment, which describes a scheduling process of a CB S message in detail.
  • the method in the embodiment corresponding to FIG. 5 is taken as an example to describe in detail that the BMC cache table includes multiple waiting schedules.
  • the specific process of the CBS message is shown in Figure 6.
  • CBS Message2 CBS Message 2
  • CBS Message3 CBS Message 3
  • the SM4 can be set by using the above S101-102; at this time, the first scheduling period in the step S101-102 is SP4, if SM4 Indirectly pointing to the scheduling period of CBS Message2 (second scheduling period), then the second scheduling period is SP6 (not shown in Figure 6); of course, it is possible that SM4 directly points to the scheduling period requiring CBS Message2, at this time the second The scheduling period should be SP5, as shown in Figure 6. According to step S103, SP5 is sent to the UE.
  • the processing method is the same as that of the CBS Message2, and is not described here.
  • the embodiment of the present invention provides a scheduling device for a CBS message, and each function module in the device can perform the corresponding steps.
  • each function module reference may be made to the foregoing method embodiment, and details are not described herein.
  • the embodiment of the present invention provides a scheduling device 70 for a CBS message, including: an obtaining unit 71: configured to send at least a scheduling period after a scheduling period, a CBS message, the first scheduling bandwidth is obtained; the first scheduling bandwidth is a maximum bandwidth that can be occupied by the scheduling message sent in the first scheduling period; and the first setting unit 72 is configured to be used in the acquiring unit.
  • the first scheduling message sent in the first scheduling period is set according to the bandwidth required to send the first CBS message in the second scheduling period, and the first scheduling message is sent in the first scheduling period.
  • a dispatch message directly Or indirectly pointing to the second scheduling period.
  • the first setting unit 72 is specifically configured to: obtain, according to a bandwidth required to send the first CBS message in the second scheduling period, a scheduling bandwidth required to directly point to the scheduling message of the second scheduling period; If the scheduling bandwidth required to directly address the scheduling message of the second scheduling period is less than or equal to the first scheduling bandwidth, set a scheduling message directly directed to the second scheduling period as the first scheduling message; or If the scheduling bandwidth of the scheduling message that directly points to the second scheduling period is greater than the first scheduling bandwidth, at least according to the scheduling bandwidth of the scheduling message that directly points to the second scheduling period, a scheduling bandwidth required for the scheduling message of the third scheduling period; the third scheduling period is a previous scheduling period of the second scheduling period; and the third scheduling bandwidth is less than or equal to the first scheduling In the case of bandwidth, a scheduling message directed to the third scheduling period is set as the first scheduling message.
  • the first setting unit 72 is specifically configured to: set a CBS scheduling period length and a new message bit in the first scheduling message according to the bandwidth occupied by each valid message to be delivered in the next scheduling period of the first scheduling period.
  • the message describes the three cells.
  • the bandwidth occupied by the valid message includes: the bandwidth occupied by the scheduling message, the bandwidth reserved for the high priority CBS message, and the bandwidth occupied by the CBS message; or the valid message.
  • the occupied bandwidth includes: the bandwidth occupied by the scheduling message, the bandwidth occupied by the CBS message, and the bandwidth reserved for the high-priority CBS message; the scheduling message to be delivered in the next scheduling period of the first scheduling period
  • the occupied bandwidth is at least obtained by the bandwidth required to send the first CBS message in the second scheduling period.
  • the first setting unit 72 is specifically configured to: set a sum of bandwidths of each valid information that is required to be sent in the first scheduling period to a CTCH BS start offset index in the first scheduling message.
  • the device further includes: a second setting unit 73: The second setting unit 73 is configured to: at a start time of the first scheduling period, if there is no CBS message to be delivered, set a first scheduling message according to at least a preset scheduling bandwidth; where the preset scheduling The bandwidth is less than the maximum possible bandwidth of the scheduled message.
  • the second setting unit 73 is specifically configured to: set a CBS scheduling period length and a new message bit in the first scheduling message according to the bandwidth occupied by each valid message to be delivered in the next scheduling period of the first scheduling period.
  • the message describes the three cells.
  • the bandwidth occupied by the valid message includes: a bandwidth occupied by the scheduling message, and a bandwidth reserved for the high priority CBS message; or the bandwidth occupied by the valid message includes: The bandwidth occupied by the bandwidth is not included in the bandwidth of the high-priority CBS message; the bandwidth occupied by the scheduling message to be delivered in the next scheduling period of the first scheduling period is the preset scheduling bandwidth.
  • the embodiment of the present invention further provides a CBS message scheduling apparatus 80, which may be an SMC, including: a memory 81 and a processor 82 connected to the memory; wherein, the memory 81 Storing a set of program code, and the processor 82 is configured to invoke the program code stored in the memory 81.
  • a CBS message scheduling apparatus 80 which may be an SMC, including: a memory 81 and a processor 82 connected to the memory; wherein, the memory 81 Storing a set of program code, and the processor 82 is configured to invoke the program code stored in the memory 81.
  • the first scheduling bandwidth is a maximum bandwidth that can be occupied by a scheduling message sent in the first scheduling period; and within a limitation of the first scheduling bandwidth, at least according to a second scheduling
  • the first scheduling message sent in the first scheduling period is set in the bandwidth required for the first CBS message to be sent in the period; the first scheduling message directly or indirectly points to the second scheduling period.
  • the disclosed systems, apparatus, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional units are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. Medium.

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Abstract

本发明公开了一种CBS消息的调度方法和装置,涉及通信领域,能够通过动态调整调度消息所占带宽的方式,减少UE为监测CBS消息的耗电。所述方法包括:在第一调度周期的起始时刻,若在其之后的调度周期需要下发至少一个CBS消息,则获取第一调度带宽;所述第一调度带宽为在所述第一调度周期内下发的调度消息所能占用的最大带宽;在所述第一调度带宽的限制内,至少根据在第二调度周期下发第一个CBS消息所需占的带宽,设置在所述第一调度周期下发的第一调度消息;所述第一调度消息直接或间接指向所述第二调度周期。

Description

一种 CBS消息的调度方法和装置 技术领域 本发明涉及通信领域, 尤其涉及一种 CBS消息的调度方法和装置。 背景技术
小区广播服务 (CBS, Cell Broadcast Service ) , 是类似于电视中 的文字广播性质的一种点到多点的多播业务, 它提供将一定数量的广播 消息以非确认的方式在一个指定的地理区域广播的功能。
3GPP 定义了 CBS 业务在 UMTS 陆地无线接入网 ( UTRAN , UMTS Terrestrial Radio Access Network ) 网络中的协议结构, 按照 3GPP 协议规定, 无线网络控制器(RNC, Radio Network Controller ) , ( BMC, Broadcast/Multicast Control ) 模块调度, 在公共传输信道 ( CTCH, Common Traffic Channel ) 上发送。
CTCH信道上发送消息的单位是 CTCH Block Set (CTCH BS) , CBS 消 息由一个或多个 CTCH BS组成。 在支持层二非连续接收方式的前提下, BMC模块在 CBS 调度周期内 除了发送普通的 CBS消息, 还将发送 BMC调度消息, BMC调度消息也是由 一个或多个 CTCH BS组成。 BMC调度信息包含消息标识、 最近更新的 CB 消息以及下一个调度周期的 BMC调度信息 CTCH BS的位置信息。 UE知道 这些信息后, 只需要在特定的时刻接收 CBS 消息, 不必要接收和解读每 个 CTCH BS。
BMC调度消息的长度本身是不固定的, 但系统为 BMC调度消息所分 配的 CTCH BS个数是固定的。 故而 UE总是需要读取固定长度的 CTCH BS。 此时, UE读取到的大多数是无效的 CTCH BS, 这将导致 UE非常耗电。 发明内容
本发明的实施例提供一种 CBS消息的调度方法和装置, 通过动态调 整调度消息所占带宽的方式, 减少了 UE为监测 CBS消息的耗电。
达到上述目的, 本发明的实施例釆用如下技术方案:
第一方面, 提供了一种 CBS消息的调度方法, 包括: 在第一调度周期的起始时刻, 若在其之后的调度周期需要下发至少 一个 CBS 消息, 则获取第一调度带宽; 所述第一调度带宽为在所述第一 调度周期内下发的调度消息所能占用的最大带宽;
在所述第一调度带宽的限制内, 至少根据在第二调度周期下发第一 个 CBS 消息所需占的带宽, 设置在所述第一调度周期下发的第一调度消 息; 所述第一调度消息直接或间接指向所述第二调度周期。 在第一种可能实现的方式中, 根据第一方面, 所述在所述第一调度 带宽的限制内, 至少根据在第二调度周期下发第一个 CBS 消息所需占的 带宽, 设置在所述第一调度周期下发的第一调度消息包括: 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 得到 直接指向所述第二调度周期的调度消息所需的调度带宽; 在所述直接指向所述第二调度周期的调度消息所需的调度带宽小于 或等于所述第一调度带宽的情况下, 设置直接指向所述第二调度周期的 调度消息作为第一调度消息; 或者, 在所述直接指向所述第二调度周期的调度消息的调度带宽大于所述 第一调度带宽的情况下, 至少根据所述直接指向所述第二调度周期的调 度消息的调度带宽, 得到直接指向所述第三调度周期的调度消息所需的 调度带宽; 所述第三调度周期为所述第二调度周期的上一调度周期; 在所述第二调度带宽小于或等于所述第一调度带宽的情况下, 设置 直接指向所述第三调度周期的调度消息作为第一调度消息。 在第三种可能实现的方式中, 根据第一方面, 至少根据在第二调度 周期下发第一个 CBS 消息所需占的带宽, 设置在所述第一调度周期下发 的第一调度消息包括: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽、 下发 CBS 消息所占带宽; 或者所述有效消息所 占带宽包括: 调度消息所占带宽、 下发 CBS 消息所占带宽、 且不包括预 留给高优先级 CBS 消息的带宽; 所述第一调度周期的下一调度周期需下 发的调度消息所占带宽至少是由在第二调度周期下发第一个 CBS 消息所 需占的带宽得到的。 在第三种可能实现的方式中, 根据第二种可能实现的方式, 至少根 据在第二调度周期下发第一个 CBS 消息所需占的带宽, 设置在所述第一 调度周期下发的第一调度消息还包括: 将所述第一调度周期所需下发的各有效信息的带宽之和, 设置为第 一调度消息中的 CTCH BS起始偏移索引这一信元的值。 在第四种可能实现的方式中, 根据第一方面, 还包括: 在第一调度 周期的起始时刻, 若不存在需要下发的 CBS消息, 则 在预设调度带宽的限制内, 至少根据所述预设调度带宽, 设置第一 调度消息; 其中, 所述预设调度带宽小于调度消息的最大可能带宽。 在第五种可能实现的方式中, 根据第四种可能实现的方式, 所述至 少根据预设调度带宽, 设置第一调度消息包括: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽; 或者所述有效消息所占带宽包括: 调度消息所 占带宽、 且不包括预留给高优先级 CBS 消息的带宽; 所述第一调度周期 的下一调度周期需下发的调度消息所占带宽为预设调度带宽。
第二方面, 提供了一种 CBS消息的调度的装置, 包括: 获取单元: 用于在第一调度周期的起始时刻, 若在其之后的调度周 期需要下发至少一个 CBS 消息, 则获取第一调度带宽; 所述第一调度带 宽为在所述第一调度周期内下发的调度消息所能占用的最大带宽; 第一设置单元: 用于在所述第一调度带宽的限制内, 至少根据在第 二调度周期下发第一个 CBS 消息所需占的带宽, 设置在所述第一调度周 期下发的第一调度消息; 所述第一调度消息直接或间接指向所述第二调 度周期。 在第一种可能实现的方式中, 根据第二方面, 所述第一设置单元具 体用于: 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 得到 直接指向所述第二调度周期的调度消息所需的调度带宽; 在所述直接指向所述第二调度周期的调度消息所需的调度带宽小于 或等于所述第一调度带宽的情况下, 设置直接指向所述第二调度周期的 调度消息作为第一调度消息; 或者, 在所述直接指向所述第二调度周期的调度消息的调度带宽大于所述 第一调度带宽的情况下, 至少根据所述直接指向所述第二调度周期的调 度消息的调度带宽, 得到直接指向所述第三调度周期的调度消息所需的 调度带宽; 所述第三调度周期为所述第二调度周期的上一调度周期; 在所述第三调度带宽小于或等于所述第一调度带宽的情况下, 设置 直接指向所述第三调度周期的调度消息作为第一调度消息。 在第二种可能实现的方式中, 根据第一方面, 所述第一设置单元具 体用于: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽、 下发 CBS 消息所占带宽; 或者所述有效消息所 占带宽包括: 调度消息所占带宽、 下发 CBS 消息所占带宽、 且不包括预 留给高优先级 CBS 消息的带宽; 所述第一调度周期的下一调度周期需下 发的调度消息所占带宽至少是由在第二调度周期下发第一个 CBS 消息所 需占的带宽得到的。 在第三种可能实现的方式中, 根据第二种可能实现的方式, 所述第 一设置单元具体用于: 将所述第一调度周期所需下发的各有效信息的带宽之和, 设置为第 一调度消息中的 CTCH BS起始偏移索引这一信元的值。 在第四种可能实现的方式中, 根据第一方面, 所述装置还包括: 第 二设置单元; 所述第二设置单元用于, 在第一调度周期的起始时刻, 若不存在需 要下发的 CBS 消息, 则在预设调度带宽的限制内, 至少根据预设调度带 宽, 设置第一调度消息; 其中, 所述预设调度带宽小于调度消息的最大 可能带宽。 在第五种可能实现的方式中, 根据第四种可能实现的方式, 所述第 二设置单元具体用于: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽; 或者所述有效消息所占带宽包括: 调度消息所 占带宽、 且不包括预留给高优先级 CBS 消息的带宽; 所述第一调度周期 的下一调度周期需下发的调度消息所占带宽为预设调度带宽。 第三方面, 提供了一种 CBS消息的调度装置, 包括: 存储器以及与所述存储器连接的处理器; 其中, 所述存储器中存储一组程序代码, 且所述处理器用于调用所 述存储器中存储的程序代码, 执行上述任意一种方法。
本发明实施例提供的一种 CBS消息的调度方法、 装置, 在第一调度周期的 起始时刻, 若预计在之后的调度周期需要下发至少一个 CBS消息, 则至少 根据在第二调度周期下发第一个 CBS消息所需占的带宽, 设置在所述第一 调度周期下发的第一调度消息; 所述第一调度消息直接或间接指向所述第 二调度周期; 也就是说, 指向第二调度周期需要多大的带宽, 就适应性的 调整第一调度消息的带宽。 通过上述动态调整调度消息所占带宽的方式, 减少了 UE为监测 CBS消息的耗电, 增加手机的待机时间。
附图说明 为了更清楚地说明本发明实施例的技术方案, 下面将对实施例或现 有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。 图 1 为本发明提供的在第一调度周期的起始时刻, 在其之后的调度 周期有需要下发的 CBS消息的调度方法流程示意图;
图 2为本发明提供的在第一调度周期的起始时刻, 在其之后的调度 周期无需要下发的 CBS消息的调度方法流程示意图;
图 3为利用本发明提供的调度方法得到的各调度周期的示意图; 图 4为利用本发明提供的调度方法得到的各调度周期的示意图; 图 5为利用本发明提供的调度方法得到的各调度周期的示意图; 图 6为利用本发明提供的调度方法得到的各调度周期的示意图; 图 Ί为本发明实施例提供的一种 CBS消息的调度装置的示意图; 图 8为本发明实施例提供的另一种 CBS消息的调度装置的示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案 进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实 施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术 人员在没有作出创造性劳动前提下所获得的所有其他实施例, 都属于本 发明保护的范围。
该方法的执行主体以 BMC为例, BMC为无线网络控制器(RNC , Ra d i o Ne twor k Con t ro l l e r ) 上处理由 CBS服务器发送的 CBS消息的模块。 当 BMC收到 CBS服务器发送的 WRITE-REPLACE消息后, BMC会将接 收的 CBS消息保存在緩存中, 等待调度。 BMC将接收的 CBS的消息发送给 UE , 并得到 UE成功接收的反馈后, 将回复 WRITE-REPLACE COMPLETE 消 息给 CBS服务器。
CBS消息及其调度消息在 CTCH信道上发送。 CTCH信道上发送消息的 单位是 CTCH B l ock Se t (CTCH BS) , CTCH BS 个数即为占用的带宽。 CBS 消息由一个或多个 CTCH BS组成, 并且必须在一个 CBS调度周期中完成 所有块的传送。 CBS调度周期最长由 256个 CTCH BS组成。 在支持层二非连续接收方式的前提下, BMC模块在 CBS 调度周期内 除了发送 CBS 消息, 还包括 BMC调度消息, 为方便起见, 将之简称为调 度消息。
调度消息也是由一个或多个 CTCH BS组成。 每个 CTCH BS所对应的 b i t数与具体设备有关, 一旦设备确定, 两者的关系就确定了。 示例的, 若 1 个 CTCH BS对应 168b i t ,去掉消息头占用的 8b i t , 对应 160b i t , 20byte。 下面结合附图对本发明实施例提供的一种 CBS 消息的调度方法进行 详细描述。 如图 1 所示, 若在任意一个调度周期 (称为第一调度周期) 的起始 时刻, 预计在之后的调度周期需要下发至少一个 CBS 消息, 即任意一个 调度周期(称为第一调度周期)的起始时刻, BMC的緩存中包含按接收顺 序保存的一个或多个等待调度的 CBS消息, 则 BMC做如下操作:
5101、 获取第一调度带宽。 上述第一调度带宽是在第一调度周期内下发的调度消息所能占用的 最大带宽, 由第一调度周期的前一个周期的调度消息预告的。
5102、 在第一调度带宽的限制内, 至少根据在第二调度周期下发的 第一个 CBS 消息所需占的带宽, 设置在第一调度周期下发的第一调度消 息; 其中第一调度消息直接或间接指向第二调度周期; 第二调度周期为 实际下发第一个 CBS消息的周期。 上述第一调度消息直接或间接指向第二调度周期的含义是, 第一调 度消息中直接或间接预告第二调度周期发送的各有效信息以及各有效信 息占用的带宽。 其中, 有效信息是指在一个调度周期内需要让 UE读取的 信息。 因为第一调度周期的调度消息 (第一调度消息) 所能占用最大带宽 受第一调度带宽限制, 所以首先需至少根据在第二调度周期下发第一个 CBS消息所需占的带宽,得到直接指向所述第二调度周期的调度消息所需 的调度带宽; 其次, 可选的在所述直接指向所述第二调度周期的调度消息所需的 调度带宽小于或等于所述第一调度带宽的情况下, 设置直接指向所述第 二调度周期的调度消息作为第一调度消息; 或者可选的, 在所述直接指向所述第二调度周期的调度消息的调度 带宽大于所述第一调度带宽的情况下, 至少根据所述直接指向所述第二 调度周期的调度消息的调度带宽, 得到直接指向所述第三调度周期的调 度消息所需的调度带宽; 所述第三调度周期为所述第二调度周期的上一 调度周期; 在所述第三调度带宽小于或等于所述第一调度带宽的情况下, 设置直接指向所述第三调度周期的调度消息作为第一调度消息。
S 103、 向终端下发第一调度消息。 通过上述方法, 在只有少量 CBS 消息情况下, 动态的调整每个调度 周期的调度消息所占带宽的方式, 减少了 UE监测 CBS消息的耗电, 增加 手机的待机时间。 如图 2 所示, 若在任意一个调度周期的起始时刻, 不存在需要下发 的 CBS消息, 即此时 BMC的緩存列表中没有等待调度的 CBS消息, 则:
S20 在预设调度带宽的限制内, 至少根据所述预设调度带宽, 设 置第一调度消息。 其中, 所述预设调度带宽小于调度消息的最大可能带宽。 由于现有 技术中, 系统为调度消息所分配的 CTCH BS个数是固定的, CTCH BS个数 按最大可能的调度消息长度进行配置, 在本发明实施例中, 预设调度带 宽小于其配置的最大可能带宽。 当然, 可以根据实际需要选择较小的值。 在第一调度周期的起始时刻, 若不存在需要下发的 CBS 消息, 则认 为其下一个调度周期需下发的调度消息的带宽釆用预设调度带宽, 故而 需要至少根据所述预设调度带宽, 设置第一调度消息。 并且, 该第一调 度消息的调度带宽需受到预设调度带宽的限制。
S202、 向终端发送所述第一调度消息。 通过上述方法, 在没有 CBS 消息的情况下, 将每个调度周期的调度 消息所占带宽设置为一个默认的较小值,减少了 UE在空闲状态下监测 CBS 消息的耗电, 增加手机的待机时间。 上述调度消息的格式如下表所示:
表 1 协议 TS 25.324中规定的调度消息格式:
Figure imgf000010_0001
表 1中各个域的含义如下:
Message Type:消息类型, BMC调度消息固定为 2。 此信元必选。
Offset to Begin CTCH BS Index:下一个 CBS调度周期的第一个 CTCH BS序号相对于对应的 BMC调度消息 (位于当前 CBS调度周期中) 的偏移 量。 二进制编码, 范围 1..255。 此信元必选。
Length of CBS Scheduling Period: 下一个 CBS 调度周期的连续 CTCH BS序号的编号长度。 与 Offset to Begin CTCH-BS Index参数一起 决定了下一个 CBS调度周期的起止点。 二进制编码, 范围 1..256。 此信 元必选。
New CBS Message Bitmap: 新 CBS消息的位图, 每一位标识调度周 期中的一个 CTCH BS块, 如果需要 UE接收该 CTCH BS, 就将位图置位。 位图长度由 Length of CBS Scheduling Period确定。 此信元必选。
Message Description: 每一个需要 UE接收的 CTCH BS的消息描述。 此信元必选。
BMC Schedule Message Extension: 其它扩展信息, 此信元可选。 本发明还提供了一个实施例,对 CBS消息的调度过程进行详细描述。 在本发明实施例中, 以支持高优先级 CBS 消息, 整个 CBS调度周期占用 的带宽固定为 128CTCH BS为例。
下面将对调度消息所占用的 CTCH BS块个数在 CBS消息到来前后的 变化及对其的动态调整过程做详细描述:
如图 3所示, 为支持高优先级 CBS消息下发, 系统为高优先级 CBS 消息预留了带宽, 本实施例中以 30个 CTCH BS为例, 一个 CBS消息调度 周期以固定占用 128个 CTCH BS为例。
在下面的描述中, 为简单起见, 称将调度周期 Schedule Period为 SP, 称调度消息 Schedule Message为 SM。 下面描述中的 SP序号, 只是 为便于举例说明, 并不是特指某个确定的调度周期。 SP中的 SM也按照对 应调度周期编号, 如 SP1中的 SM记为 SM1。
SP1: 在 SP1的起始时刻, BMC的緩存中没有需要向 UE下发的 CBS消息, 因此 SM1只需要预告下一个调度周期的有效消息, 即 SM和为预留给高优 先级 CBS消息的带宽, 此时可以将 SM所需的 CTCH BS个数可以设置为预 设调度带宽, 上述预设调度带宽为一个默认最小预设调度带宽, 以 6 个 CTCH BS为例。 此时, 可以按照 S201设置 SM1; 按照 S202将 SM1发送给 UE。 当然, 由于本发明实施例支持高优先级 CBS消息, 故而在 SP1中 BMC 还预留了高优先级 CBS消息的带宽。 此时 SMI的实际长度为 44byte, 具体如下表所示。
表 2 SM1
Figure imgf000012_0001
如表 2所示, 其中:
Message Type的值在本实施例中固定为 2, 表示是 BMC的调度消息, 这样 UE可以得知接收的信息是用于 CBS消息的调度或和发送。
Offset to Begin CTCH BS index的值为 128,表示下一调度周期( SP2 ) 可占用的第一个 CTCH BS序号相对于当前 CBS调度周期 ( SP1 ) 中的 SM 的偏移量为 128, 由于本实施例的 CBS调度周期长度固定为 128个 CTCH BS, 因此 SM中这个信元的值总是 128。
Length of CBS Scheduling Period的值为 36, 等于 SP2 中下发的 各有效消息所占的带宽之和, 即 SP2中下发 SM所占的 6个 CTCH BS与高 优先级预留的 30个 CTCH BS之和。 其中 SP1的起始时刻没有需要调度的 CBS消息, 故而认为 SP2 中下发 SM需占用预设调度带宽 6个 CTCH BS。 此信元表示下一个 CBS调度周期占用的连续 CTCH BS序号的编号长度。 Length of CBS Scheduling Period与 Offset to Begin CTCH - BS Index 一起决定了下一个 CBS调度周期的起止点。
New CBS Message Bitmap: 每一位表示下一个调度周期 ( SP2 ) 中的 一个 CTCH BS块, 如果需要 UE接收该 CTCH BS, 就将位图置位。 位图长 度由 Length of CBS Scheduling Period 确定。 此时 Length of CBS Scheduling Period等于 36, 因此将其前 36bit置为 1。 Message Description: 每一个下一个调度周期 ( SP2 ) 需要 UE接收 的 CTCH BS的消息描述。 具体的, SM占用的每个 CTCH BS用 6表示, 描 述信息占 lbyte, 高优先级消息占用的每个 CTCH BS用 2表示, 描述信息 占 lbyte, CBS消息占用的每个 CTCH BS用 1表示, 描述信息占 3byte。 上述描述信息占用的总 byte为 6 1 + 30 1 = 36。
SP2:
为了将如何调度 CBS消息的过程阐述清楚, 假设在 SP1 内, 确切的 说是在 SP1下发调度消息之后, BMC收到 CBS服务器发送的至少一个 CBS 消息, BMC按照接收的顺序将之依次保存在緩存中, 等待调度。 在本发明 实施例中以收到一个 CBS 消息为例, 若收到多个将在后面的实施例中详 述。
由于在 SP2的起始时刻,预计在之后的调度周期需要下发 CBS消息, 故而可以釆用上述 S101-102设置 SP2的 SM; 此时, 步骤 S101-102中的 第一调度周期为 SP2, 若 SP2的 SM间接指向需要下发第一个 CBS消息的 调度周期 (第二调度周期) , 则该第二调度周期为图示中的 SP4; 当然, 有可能 SP2的 SM直接指向需要下发第一个 CBS消息的调度周期, 此时该 第二调度周期应为 SP3 (这种情况未在图中示出)。
第一种情形, 以第一调度周期为 SP2、 第二调度周期是 SP4 为例详 述(此时直接指向 SP4的 SM所占带宽大于 SM1指向的其下一调度周期的 SM可用的最大带宽) 。 假定收到的 CBS消息需要占用 30个 CTCH BS, 并且不是高优先级的 CBS消息, 不在紧急消息预留带宽发送。
按照 S101, 获取在 SM2所能占用的最大带宽, 即从 SM1 中获取 SM2 所能占用的最大带宽, 以上述的 6个 CTCH BS为例。
按照 S 102,在这 6个 CTCH BS的限制内,至少根据在 SP4下发该 CBS 消息所需占的带宽, 设置在 SM2。
( 1 )按照上述假设在 SP4下发该 CBS消息所需占的带宽为 30个 CTCH BS, 至少根据此 CBS消息的带宽, 得到直接指向 SP4的 SM所需的调度带 宽, 在上述前提下, 直接指向 SP4的 SM为 SM3。
SM3 用于预告 SP4 中的各个有效信息所占的带宽, 所以实际上需要 根据 SP4 中的各个有效信息需占的带宽才能确定。 在本实施例中上述有 效信息需占的带宽包括 SM4 所占的带宽、 预留给高优先级 CBS 消息的带 宽和上述 CBS 消息所占的带宽。 另外, 为了简化实现的难度, 本发明实 施例中还可以估计 SM3的带宽, 使用估计值即可。 可选的, 可以只根据 CBS消息所占的带宽, 示例的, 通过计算的方 式或者查表的方式, 得到 SM3所占的带宽的估计值;
可选的, 可以根据 CBS消息所占的带宽和预留给高优先级 CBS消息 的带宽, 示例的, 通过计算的方式或者查表的方式, 得到 SM3 所占的带 宽更准确的估计值;
可选的, 可以根据 SM4所占的带宽、 预留给高优先级 CBS消息的带 宽和上述 CBS 消息所占的带宽, 示例的, 通过计算的方式或者查表的方 式, 得到 SM3所占的带宽的精确值。 一般而言, SM4 所占的带宽与 SP4 以后的调度周期中的有效信息有 关, 较难确定, 并且和预留给高优先级 CBS 消息所占的带宽和 CBS 消息 所占的带宽相比, 其对 SM3所占带宽的影响较小。
( 2 ) 至少根据 SM3得到 SM2所占的带宽; 由于 SP 3中只包括 SM3所占的带宽和预留给高优先级 CBS消息所占 的带宽, 因此, 可选的, 可以只根据 SM3所占的带宽, 示例的, 通过计算的方式或 者查表的方式, 得到 SM2所占的带宽的估计值;
可选的, 可以根据 SM3所占的带宽和预留给高优先级 CBS消息所占 的带宽, 示例的, 通过计算的方式或者查表的方式, 得到 SM2 所占的带 宽的估计值或精确值, 由 SM3所占的带宽是估计值还是精确值决定。
( 3 ) 若 SM2小于或等于 SM1指向的其下一调度周期的 SM可用的最 大带宽, 设置直接指向 SP 3的 SM2。
表 3 SM2 Information Element Length Value
Message Type 1 2(Schedule Message)
Offset to Begin CTCH BS 1 128
index
Length of CBS Scheduling 1 54 =24+30
Period
New Message Bitmap 7 前 54BIT为 1
Message Description 54 0-23: 6 ( Schedule Message)
24-53: 2 (Reading advised)
BMC在 SM2中预告 SM3可以占用的最大 CTCH BS个数为 24个 CTCH BS, 则此时 SM2如表 3所示, 其中, 信元 CBS调度周期长度 ( Length of CBS Scheduling Period ) 设置为 SP3 中需下发的各有效消息所占带宽之和为 54 ( 24+30=54 ) , 其 中 24为 SM3所占带宽, 30为预留给高优先级 CBS消息的带宽, 另外, 由 于 SP3中还需要下发第一个 CBS消息, 故而下发 CBS消息所占带宽为 0。
信元 New Message Bit map设置为前 54bi t为 1。
信元 Message Description中, SM占用的每个 CTCH BS用 6表示, 描述信息占 lbyte, 高优先级消息 ( Reading advised, 建议阅读) 占用的 每个 CTCH BS用 2表示, 描述信息占 lbyte。 上述描述信息占用的总 by te 为 24 χ 1 + 30 1=54。
SM2共占用 64byte, 小于 6个 CTCH BS ( 6 20by te=l 20by te ) 。 之后, 按照步骤 S103, 向 UE发送 SP2。 第二种情形, 以第一调度周期为 SP2、 第二调度周期是 SP3 为例详 述(此时直接指向 SP3的 SM所占带宽小于或等于 SM1指向的其下一调度 周期的 SM可用的最大带宽) 。 在这种情况下, 4艮定收到的 CBS消息需要占用 10个 CTCH BS, 并且 不是高优先级的 CBS消息, 不在紧急消息预留带宽发送。 按照 S101, 获取在 SM2所能占用的最大带宽, 即从 SM1 中获取 SM2 所能占用的最大带宽, 以上述的 6个 CTCH BS为例。
按照 S 102,在这 6个 CTCH BS的限制内,至少根据在 SP4下发该 CBS 消息所需占的带宽, 设置在 SM2。 先进行上述的 ( 1 ) , 得到直接指向 SP3的 SM所需的调度带宽, 且 该带宽在 SM2所能占用的最大带宽的限制内 (也就是说, SM2小于或等于 SM1指向的其下一调度周期的 SM可用的最大带宽) , 此时设置直接指向 SP3的 SM2。 之后, 按照步骤 S103, 向 UE发送 SP2。
SP3: 由于在 SP3 的起始时刻, 预计在之后的调度周期需要下发上述 CBS 消息, 故而可以釆用上述 S101-102设置 SM3; 此时, 步骤 S101-102中的 第一调度周期为 SP3。 表 4 SM3
Figure imgf000016_0001
表 4中的信元 Message Description, 由于 SP4中包括要发送的 CBS 消息所占带宽为 30个 CTCH BS, 其描述信息为每个 CTCH BS对应 3byte, 因此 Message Description的 0-89这 90个 byte用于描述上述 CBS消息。 假定在 SP4, 确切的说是在 SM4发送之前, BMC的緩存中没有 CBS消 息, 则 SM4预告 SM5所占的最大带宽恢复到默认最小预设调度带宽 6个 CTCH BS, 其描述信息为每个 BS对应 lbyte, 因此 Message Description 的 90-95这 6个 byte用于描述 SM4; 每个高优先级预留带宽的描述信息 对应 lbyte, 因此 Message Description的 96-125这 30个 byte用于描 述为高优先级预留的带宽。 之后, 按照步骤 S103, 向 UE发送 SP3。 SP4: 由于在 SP4 的起始时刻, 预计在之后的调度周期需要下发上述 CBS 消息, 故而可以釆用上述 S101-102设置 SM4; 此时, 步骤 S101-102中的 第一调度周期为 SP4。 表 5 SM4
Figure imgf000017_0001
假定在 SP4, 确切的说是在 SM4发送之前, BMC的緩存中没有 CBS消 息, 则 SM4预告 SM5所占的最大带宽恢复到默认最小预设调度带宽 6个 CTCH BS, 因此 SM4 的 Length of CBS Scheduling Period信元设置为 SP5的有效带宽之和, 即等于 30个为高优先级预留的 CTCH BS与 SM5所 占的 6个 CTCH BS之和 36 ( 30+6 = 36 ) 。 之后, 按照步骤 S103, 向 UE发送 SP4。
SP5: 在 SP5的起始时刻, BMC的緩存中没有需要向 UE下发的 CBS消息, 处理同 SP1, 这里不再赘述。
本发明还提供了另一个实施例, 对 CBS消息的调度过程进行详细描 述。
在图 3对应的实施例中, BMC在 SP1 内收到一个 CBS 消息, 在 SP4 才将其发送给 UE。 也就是说在最长情况下, BMC从想要下发一个 CBS 消 息到将之发送给 UE的时延需 3个 CBS调度周期。
本实例在图 3对应的实施例的基础上, 缩短了部分 CBS调度周期, 减少由于 SM动态变化引起的时延。
本实施例支持高优先级 CBS消息, 并且以收到一个 CBS消息为例, 若收到多个将在后面的实施例中详述。
假定收到的 CBS消息需要占用 30个 CTCH BS, 并且不是高优先级的 CBS消息, 不在紧急消息预留带宽发送。 系统为高优先级 CBS消息预留了 带宽, 本实施例中以 30个 CTCH BS为例。
本实施例仅以第一调度周期为 SP2、 第二调度周期是 SP4为例, 并仅 对于上述实施例的不同之处进行详述, 相同之处不再赘述:
如图 4所示, 在 SP2的起始时刻, 为了加快上述 CBS消息的发送, 将 SP2 的长度缩短为 36个 CTCH BS, 等于 SMI中预告的为高优先级 CBS消息预留的 30 个 CTCH BS与 SM2所占的最大 6个 CTCH BS之和, 即 SM2中信元 Of f set to Begin CTCH BS index为 36, SP2il 过空消息 (No Message, 简称为 No Msg ) 部分。 此时 SM2的总长度为 30byte, 小于 6个 CTCH BS。
表 6 SM2
Figure imgf000018_0001
BMC在 SM 3的中预告上述 CB S消息给 UE , 即 SM 3指向 S P 4 (第二调度周期, SM3的可用最大带宽为 24个 CTCH BS。 为了加快第一 CBS消息的下发, SP 3也 被缩短, 取消了空消息部分和高优先级 CBS消息预留带宽, 因为此时已经确 定上述 CBS消息不是 CBS消息, 不用预留高优先级 CBS消息的带宽。 因此 SP 3 只有 SM3 , SP 3缩短为 24个 CTCH BS ,如表 7所示,即 SM3的信元 Of f s e t to Beg i n CTCH BS index为 24。 SM的实际长度为 1 38字节, 小于 6个 CTCH BS。
表 7 SM3
Figure imgf000019_0001
可见, 此时上述 CBS消息的发送时延从 384个 CTCH BS (每个 CBS周期占 128个 CTCH BS 3个 CBS调度周期 = 384 )缩短到 188个 CTCH BS ( 128个 CTCH BS + 36个 CTCH BS +24个 CTCH BS =188 ) , 降低了 CBS消息的发送时延。
本发明还提供了一个实施例, 对 CBS消息的调度过程进行详细描述。 本实例在上述图 4对应的实施例的基础上, 取消了高优先级 CBS消息, 进一 步缩短了调度周期, CBS消息的下发时延并没有增加, 即便对于高优先级消 息也是如此, 整个调度过程如图 5所示。
本实施例不支持高优先级 CBS消息, 并且以收到一个 CBS消息为例, 假 定收到的 CBS消息需要占用 30个 CTCH BS , 若收到多个将在后面的实施例中 详述。
本实施例仅以第一调度周期为 SP2、 第二调度周期是 SP4为例, 仅对于 上述实施例的不同之处进行详述, 相同之处不再赘述: 在 SP1的起始时刻, BMC的緩存中没有需要向 UE下发的 CBS消息, 因此 SM1只需要预告下一个调度周期的 SM, 此时可以将 SM所需的 CTCH BS个数可 以设置为一个默认最小预设调度带宽。由于此时取消了高优先级 CBS消息预 留带宽,所以相应的, SM中预告高优先级 CBS消息预留带宽的部分也取消了, 因此 SM的总长度也相对变小。
因此示例的, 将表 8中的默认最小预设调度带宽设置为 1个 CTCH BS。 SMI的长度为 5个 byte, 小于 1个 CTCH BS, SP1长为 128个 CTCH BS , SP1的信 元 Offset to Begin CTCH BS index为 128。
表 8 SMI
Figure imgf000020_0001
SM2预告 SM3所占的最大带宽, 上述最发带宽的获取方法同上述实施例 中介绍的方法, 这里不再赘述, 不同的是, 由于取消了高优先级 CBS消息, 因此得到的具体值由上述实施例中的 24个 CTCH BS变为 6个 CTCH BS。 SP2只 包括 SM2, 占用 1个 CTCH BS, SM2的信元 Off set to Begin CTCH BS index 为 1。
表 9 SM2
Figure imgf000020_0002
SM3预告 SM4所占的最大带宽, SM3占 6个 CTCH BS, SP3只包括 SM3, 占 用 6个 CTCH BS, SP3的信元 Offset to Begin CTCH BS index为 6。
假定在 SP4的起始时刻, 确切的说是在 SP3 发送其 SM之前, BMC的緩 存中除上述 CBS消息外没有其他 CBS消息需要发送,则预告 SM4所占的最大带 宽设置为默认最小预设调度带宽 1个 CTCH BS。
表 9 SM3
Figure imgf000021_0001
在 SP4, BMC从緩存中取出上述 CBS消息发送给 UE。 SP4的长为 128 个 CTCH BS。 SM4的信元 Offset to Begin CTCH BS index为 128。
表 10 SM4
Figure imgf000021_0002
从上述描述可见, BMC从 SP1收到 CBS消息到 SP4发送 CBS消息, 迟 延从 188个 CTCH BS减小到 135个 CTCH BS ( 128+1+6=135 ) , 降低了 CBS 消息的发送时延。
本发明还提供了另一个实施例, 对 CB S消息的调度过程进行详细描述。 在上述任意一个实施例的基础上, 若 BMC的緩存表中包含多个等待调 度的 CBS消息, 以图 5对应的实施例所述方法为例, 详细描述 BMC的緩存表中 包含多个等待调度的 CBS消息时的具体过程, 如图 6所示。
假定在 SP4的起始时刻, 确切的说是在 SP3 发送其 SM之前, BMC 的緩存中除上述 CBS 消息还有其他 CBS 消息需要发送, 假设上述其他的 CBS消息分别为 CBS消息 2( CBS Message2 ) , CBS消息 3( CBS Message3 ) , 上述在 SP4 中发送的 CBS 消息为 CBS消息 1 ( CBS Messagel ) , 则需在 SM4中预告 CBS Message2给 UE。 具体方法, 与上述图 3对应的实施例中 描述方法相同。
由于在 SP4的起始时刻, 预计在之后的调度周期需要下发 CBS消息 2, 故而可以釆用上述 S101-102设置 SM4; 此时, 步骤 S101-102中的第 一调度周期为 SP4, 若 SM4间接指向 CBS Message2的调度周期 (第二调 度周期) , 则该第二调度周期为 SP6 (图 6 中未标出) ; 当然, 有可能 SM4直接指向需要 CBS Message2的调度周期, 此时该第二调度周期应为 SP5, 如图 6所示。 按照步骤 S103, 向 UE发送 SP5。
对于 BMC緩存表中后续待调度的 CBS消息,处理方法与 CBS Message2 的处理方法相同, 此处不再赘述。 本发明实施例提供了一种 CBS消息的调度装置, 该装置中的各个功 能模块可以执行上述相应的步骤, 对各个功能模块的描述可参考上述的 方法实施例, 在此不加赘述。
如图 7所示, 本发明实施例提供了一种 CBS消息的调度装置 70, 包 括: 获取单元 71: 用于在第一调度周期的起始时刻, 若在其之后的调度 周期需要下发至少一个 CBS 消息, 获取第一调度带宽; 所述第一调度带 宽为在所述第一调度周期内下发的调度消息所能占用的最大带宽; 第一设置单元 72: 用于在所述获取单元 71 获取的第一调度带宽的 限制内, 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 设置在所述第一调度周期下发的第一调度消息; 所述第一调度消息直接 或间接指向所述第二调度周期。 所述第一设置单元 72具体用于: 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 得到 直接指向所述第二调度周期的调度消息所需的调度带宽; 在所述直接指向所述第二调度周期的调度消息所需的调度带宽小于 或等于所述第一调度带宽的情况下, 设置直接指向所述第二调度周期的 调度消息作为第一调度消息; 或者, 在所述直接指向所述第二调度周期的调度消息的调度带宽大于所述 第一调度带宽的情况下, 至少根据所述直接指向所述第二调度周期的调 度消息的调度带宽, 得到直接指向所述第三调度周期的调度消息所需的 调度带宽; 所述第三调度周期为所述第二调度周期的上一调度周期; 在所述第三调度带宽小于或等于所述第一调度带宽的情况下, 设置 直接指向所述第三调度周期的调度消息作为第一调度消息。 所述第一设置单元 72具体用于: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽、 下发 CBS 消息所占带宽; 或者所述有效消息所 占带宽包括: 调度消息所占带宽、 下发 CBS 消息所占带宽、 且不包括预 留给高优先级 CBS 消息的带宽; 所述第一调度周期的下一调度周期需下 发的调度消息所占带宽至少是由在第二调度周期下发第一个 CBS 消息所 需占的带宽得到的。 所述第一设置单元 72具体用于: 将所述第一调度周期所需下发的各 有效信息的带宽之和, 设置为第一调度消息中的 CTCH BS起始偏移索引。 所述装置还包括: 第二设置单元 73 : 所述第二设置单元 73用于在第一调度周期的起始时刻,若不存在需 要下发的 CBS 消息, 则至少根据预设调度带宽, 设置第一调度消息; 其 中, 所述预设调度带宽小于调度消息的最大可能带宽。 所述第二设置单元 73具体用于: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽; 或者所述有效消息所占带宽包括: 调度消息所 占带宽、 且不包括预留给高优先级 CBS 消息的带宽; 所述第一调度周期 的下一调度周期需下发的调度消息所占带宽为预设调度带宽。
另外, 如图 8所示, 本发明实施例还提供了一种 CBS消息的调度装 置 80 ,可以是 SMC , 包括:存储器 81 以及与所述存储器连接的处理器 82 ; 其中, 所述存储器 81 中存储一组程序代码, 且所述处理器 82用于 调用所述存储器 81 中存储的程序代码, 在第一调度周期的起始时刻, 若 在其之后的调度周期需要下发至少一个 CBS 消息, 获取第一调度带宽; 所述第一调度带宽为在所述第一调度周期内下发的调度消息所能占用的 最大带宽; 在所述第一调度带宽的限制内, 至少根据在第二调度周期下 发第一个 CBS 消息所需占的带宽, 设置在所述第一调度周期下发的第一 调度消息; 所述第一调度消息直接或间接指向所述第二调度周期。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装 置和方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例 仅仅是示意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单元或组件可以结合或者 可以集成到另一个系统, 或一些特征可以忽略, 或不执行。 另一点, 所 显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接 口, 装置或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形 式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开 的, 作为单元显示的部件可以是或者也可以不是物理单元, 即可以位于 一个地方, 或者也可以分布到多个网络单元上。 可以根据实际的需要选 择其中的部分或者全部单元来实现本实施例方案的目的。 另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单 元中, 也可以是各个单元单独物理包括, 也可以两个或两个以上单元集 成在一个单元中。 上述集成的单元既可以釆用硬件的形式实现, 也可以 釆用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元, 可以存储在一个计 算机可读取存储介质中。 上述软件功能单元存储在一个存储介质中, 包 括若干指令用以使得一台计算机设备 (可以是个人计算机, 服务器, 或 者网络设备等) 执行本发明各个实施例所述方法的部分步骤。 而前述的 存储介质包括: U盘、 移动硬盘、 只读存储器 (Read-Only Memory, 简 称 ROM ) 、 随机存取存储器 (Random Access Memory, 简称 RAM ) 、 磁碟或者光盘等各种可以存储程序代码的介质。 最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非 对其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的 普通技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案 进行修改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替 换, 并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和 范围。

Claims

权 利 要 求 书
1、 一种 CBS消息的调度方法, 其特征在于, 所述方法包括: 在第一调度周期的起始时刻, 若在其之后的调度周期需要下发至少 一个 CBS消息, 则 获取第一调度带宽; 所述第一调度带宽为在所述第一调度周期内下 发的调度消息所能占用的最大带宽; 在所述第一调度带宽的限制内, 至少根据在第二调度周期下发第一 个 CBS 消息所需占的带宽, 设置在所述第一调度周期下发的第一调度消 息; 所述第一调度消息直接或间接指向所述第二调度周期。
2、 根据权利要求 1所述方法, 其特征在于, 所述在所述第一调度带 宽的限制内, 至少根据在第二调度周期下发第一个 CBS 消息所需占的带 宽, 设置在所述第一调度周期下发的第一调度消息包括: 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 得到 直接指向所述第二调度周期的调度消息所需的调度带宽; 在所述直接指向所述第二调度周期的调度消息所需的调度带宽小于 或等于所述第一调度带宽的情况下, 设置直接指向所述第二调度周期的 调度消息作为第一调度消息; 或者, 在所述直接指向所述第二调度周期的调度消息的调度带宽大于所述 第一调度带宽的情况下, 至少根据所述直接指向所述第二调度周期的调 度消息的调度带宽, 得到直接指向所述第三调度周期的调度消息所需的 调度带宽; 所述第三调度周期为所述第二调度周期的上一调度周期; 在所述第三调度带宽小于或等于所述第一调度带宽的情况下, 设置 直接指向所述第三调度周期的调度消息作为第一调度消息。
3、 根据权利要求 1所述方法, 其特征在于, 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 设置 在所述第一调度周期下发的第一调度消息包括: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽、 下发 CBS 消息所占带宽; 或者所述有效消息所 占带宽包括: 调度消息所占带宽、 下发 CBS 消息所占带宽、 且不包括预 留给高优先级 CBS 消息的带宽; 所述第一调度周期的下一调度周期需下 发的调度消息所占带宽至少是由在第二调度周期下发第一个 CBS 消息所 需占的带宽得到的。
4、 根据权利要求 3所述方法, 其特征在于, 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 设置 在所述第一调度周期下发的第一调度消息还包括: 将所述第一调度周期所需下发的各有效信息的带宽之和, 设置为第 一调度消息中的 CTCH BS起始偏移索引这一信元的值。
5、 根据权利要求 1所述方法, 其特征在于, 所述方法还包括: 在第一调度周期的起始时刻, 若不存在需要下发的 CBS消息, 则 在预设调度带宽的限制内, 至少根据所述预设调度带宽, 设置第一 调度消息; 其中, 所述预设调度带宽小于调度消息的最大可能带宽。
6、 根据权利要求 5所述方法, 其特征在于, 所述至少根据预设调度带宽, 设置第一调度消息包括: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽; 或者所述有效消息所占带宽包括: 调度消息所 占带宽、 且不包括预留给高优先级 CBS 消息的带宽; 所述第一调度周期 的下一调度周期需下发的调度消息所占带宽为预设调度带宽。
7、 一种 CBS消息的调度装置, 其特征在于, 所述装置包括: 获取单元: 用于在第一调度周期的起始时刻, 若在其之后的调度周 期需要下发至少一个 CBS 消息, 则获取第一调度带宽; 所述第一调度带 宽为在所述第一调度周期内下发的调度消息所能占用的最大带宽; 第一设置单元: 用于在所述第一调度带宽的限制内, 至少根据在第 二调度周期下发第一个 CBS 消息所需占的带宽, 设置在所述第一调度周 期下发的第一调度消息; 所述第一调度消息直接或间接指向所述第二调 度周期。
8、 根据权利要求 7所述装置, 其特征在于, 所述第一设置单元具体 用于: 至少根据在第二调度周期下发第一个 CBS 消息所需占的带宽, 得到 直接指向所述第二调度周期的调度消息所需的调度带宽; 在所述直接指向所述第二调度周期的调度消息所需的调度带宽小于 或等于所述第一调度带宽的情况下, 设置直接指向所述第二调度周期的 调度消息作为第一调度消息; 或者, 在所述直接指向所述第二调度周期的调度消息的调度带宽大于所述 第一调度带宽的情况下, 至少根据所述直接指向所述第二调度周期的调 度消息的调度带宽, 得到直接指向所述第三调度周期的调度消息所需的 调度带宽; 所述第三调度周期为所述第二调度周期的上一调度周期; 在所述第三调度带宽小于或等于所述第一调度带宽的情况下, 设置 直接指向所述第三调度周期的调度消息作为第一调度消息。
9、 根据权利要求 7所述的装置, 其特征在于, 所述第一设置单元具 体用于: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽、 下发 CBS 消息所占带宽; 或者所述有效消息所 占带宽包括: 调度消息所占带宽、 下发 CBS 消息所占带宽、 且不包括预 留给高优先级 CBS 消息的带宽; 所述第一调度周期的下一调度周期需下 发的调度消息所占带宽至少是由在第二调度周期下发第一个 CBS 消息所 需占的带宽得到的。
1 0、 根据权利要求 9 所述装置, 其特征在于, 所述第一设置单元具 体用于: 将所述第一调度周期所需下发的各有效信息的带宽之和, 设置为第 一调度消息中的 CTCH BS起始偏移索引这一信元的值。
1 1、 根据权利要求 7 所述的装置, 其特征在于, 所述装置还包括: 第二设置单元; 所述第二设置单元用于, 在第一调度周期的起始时刻, 若不存在需 要下发的 CBS 消息, 则在预设调度带宽的限制内, 至少根据预设调度带 宽, 设置第一调度消息; 其中, 所述预设调度带宽小于调度消息的最大 可能带宽。
1 2、 根据权利要求 1 1所述的装置, 其特征在于, 所述第二设置单元 具体用于: 根据所述第一调度周期的下一调度周期需下发的各有效消息所占带 宽, 设置第一调度消息中的 CBS 调度周期长度、 新消息比特位图、 消息 描述这三个信元; 其中, 所述有效消息所占带宽包括: 调度消息所占带宽、 预留给高 优先级 CBS 消息的带宽; 或者所述有效消息所占带宽包括: 调度消息所 占带宽、 且不包括预留给高优先级 CBS 消息的带宽; 所述第一调度周期 的下一调度周期需下发的调度消息所占带宽为预设调度带宽。
1 3、 一种 CBS消息的调度装置, 其特征在于, 包括: 存储器以及与所述存储器连接的处理器; 其中, 所述存储器中存储一组程序代码, 且所述处理器用于调用所 述存储器中存储的程序代码, 执行如权利要求 1 -6 中任意一项所述的方 法。
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