CN110753393A - Method and device for issuing public control message - Google Patents
Method and device for issuing public control message Download PDFInfo
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- CN110753393A CN110753393A CN201810811828.3A CN201810811828A CN110753393A CN 110753393 A CN110753393 A CN 110753393A CN 201810811828 A CN201810811828 A CN 201810811828A CN 110753393 A CN110753393 A CN 110753393A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/005—Transmission of information for alerting of incoming communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
Abstract
The application provides a method and a device for issuing a public control message, which are applied to a small-bandwidth network, and the method comprises the following steps: determining a paging subframe according to the configured nB; and reserving the determined paging subframe for transmitting the paging message, and not allowing semi-static scheduling on the reserved paging subframe for transmitting the paging message. The scheme can ensure the issuing of the public control message under a small bandwidth.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for issuing a common control message.
Background
In a trunking system, an uplink carrier aggregation technology aggregates discrete small-band wide frequency bands into a large bandwidth to provide video services, an uplink needs more PDCCH resources, and at the moment, for a downlink small bandwidth, there is a problem that PDCCH resources are limited, and in order to ensure that downlink group services are scheduled in time, a scheduling mode of a group needs to be defined as semi-static scheduling.
When the group scheduling mode is semi-static scheduling, multiple groups are concurrent, all subframes in a semi-static scheduling period are occupied, and therefore common control messages such as paging messages, system broadcast messages and random access response messages cannot be issued.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for issuing a common control message, which can ensure that the common control message is issued under a small bandwidth.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a method for issuing a common control message is applied to a small-bandwidth network, and comprises the following steps:
determining a paging subframe according to the configured nB;
and reserving the determined paging subframe for transmitting the paging message, and not allowing semi-static scheduling on the reserved paging subframe for transmitting the paging message.
A public control message issuing device is applied to a small-bandwidth network, and comprises: a determining unit and a reserving unit;
the determining unit is configured to determine a paging subframe according to the configured nB;
and the reservation unit is used for reserving the paging subframe determined by the determination unit for transmitting the paging message and not allowing semi-static scheduling on the reserved paging subframe for transmitting the paging message.
According to the technical scheme, the paging subframe is determined according to the configured nB, the determined paging subframe is reserved for issuing the paging message, and semi-static scheduling is not allowed to be performed on the reserved paging subframe. The scheme of reserving the paging sub-frame in advance can ensure the issuing of the common control message under the small bandwidth.
Drawings
Fig. 1 is a schematic diagram illustrating a paging message issuing process in an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a system broadcast message issuing process in an embodiment of the present application;
fig. 3 is a schematic diagram illustrating a process of issuing a random access response message in an embodiment of the present application;
FIG. 4 is a diagram illustrating reserved allocations of a paging subframe, a system message subframe, and a random access response subframe according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an apparatus applied to the above-described technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a method for issuing a public control message, which is applied to a small-bandwidth network, determines a paging subframe according to the configured number (nB) of paging groups, reserves the determined paging subframe for issuing the paging message, and does not allow semi-static scheduling on the reserved paging subframe. The scheme of reserving the paging sub-frame in advance can ensure the issuing of the common control message under the small bandwidth.
The following describes in detail the issuing manner of paging message, system broadcast message and random access response message in common control message with reference to the accompanying drawings:
for paging messages:
in a trunking system, a strategy adopted by a group Paging message (G-Paging) is to send a fixed subframe in a Paging cycle, and for a Paging message (PS-Paging) of a PS service, the following processing manner is provided in the embodiment of the present application:
referring to fig. 1, fig. 1 is a schematic diagram illustrating a paging message issuing process in an embodiment of the present application. The method comprises the following specific steps:
In the step, nB is configured according to the time delay requirement; the longer the delay requirement is, the smaller the configured nB is;
the desirable values of nB in the protocol standard are: 4T, 2T, T, T/2, T/4, T/8, T/16, T/32.
In the embodiment of the application, the configurable nB is T/2, T/4, T/8, T/16 or T/32 in order to fix the paging frame as an even frame.
The nB configured in this way can ensure that the requirement of sending the paging message can be met only by reserving the paging sub-frame of the even frame in the semi-static scheduling period, and the odd radio frame resource is saved.
The Paging Frame (PF) and the Paging Occasion (PO) are calculated from the DRX parameters carried in the system messages by the following formula:
the paging frame is derived from the following equation:
SFN mod T ═ T div N (T div N) × (UE _ ID mod N); wherein div represents the integer divide; mod denotes the remainder;
the paging subframe index i _ s is given by the following formula:
i _ s ═ floor (UE _ ID/N) mod Ns; floor denotes rounding down;
wherein nB is T/2, T/4, T/8, T/16 or T/32;
t is DRX period of UE. T depends on the shortest of the UE-specific DRX values (as specified by higher layers) and the default DRX values for system information broadcast. A default value is used if the higher layer does not specify UE-specific DRX.
N is min (T, nB); i.e., the smaller of T and nB;
ns is max (1, nB/T); i.e., the greater of 1 and nB/T;
the UE _ ID is IMSI mod 1024.
The values of PF, Ns, and i _ s can be determined through the above calculation, and the embodiment of the present application is different from the existing implementation only in configured nB, and once nB is determined, the values of PF, Ns, and i _ s are calculated as in the existing implementation.
After the values of Ns and i _ s are determined, the corresponding sub-frames can be determined by looking up the table, and the table entries corresponding to the sub-frame numbers in different systems are respectively given below.
Referring to table 1, table 1 is a table entry corresponding to the subframe number of the FDD PO.
TABLE 1
Referring to table 2, table 2 is a table entry corresponding to the subframe number of the TDD scheme PO.
TABLE 2
And 102, the base station reserves the determined paging subframe for transmitting the paging message of the PS service, and does not allow semi-static scheduling on the reserved paging subframe for transmitting the paging message of the PS service.
If no paging message is issued on the reserved paging subframe for issuing the paging message, the dynamic scheduling is carried out on the paging subframe compared with the message with low priority of the public control message.
For system broadcast messages:
the system broadcast message is divided into MIB and multiple SIBs messages, where the protocol specifies the transmission period and the number of retransmissions of the MIB and SIB1 messages, i.e., the MIB is scheduled using a fixed 40ms period, and the retransmission is scheduled within 40ms, the first transmission is scheduled on the #0 subframe of the radio frame satisfying SFN mod 4 ═ 0, and the retransmission is scheduled on the #0 subframe of all other radio frames.
The SIB1 is repeatedly transmitted within 80ms using 80ms periodic scheduling. The first transmission is on subframe # 5 of the radio frame satisfying SFN mod 8 ═ 0, and the retransmission is on #5 subframes of all other radio frames satisfying SFN mod 2 ═ 0.
And transmitting the SI message in a dynamic scheduling mode in a periodically transmitted time window. Each SI message is associated with one SI-window, and the SI-windows of different SI messages do not overlap each other. That is, only the corresponding SI can be transmitted in one SI-window, and the initial transmission and the retransmission are performed in one time window.
The procedure for reserving subframes for SI messages other than MIB and SIB1 messages is given below:
referring to fig. 2, fig. 2 is a schematic diagram illustrating a system broadcast message issuing process in the embodiment of the present application. The method comprises the following specific steps:
in step 201, for SI messages other than MIB and SIB1 messages, the base station carries only one SIB message per SI message.
When this step is implemented specifically, each SIB message is mapped to a different SI message, that is, different SIB messages are not sent in the same SI.
Wherein m and n are integers more than 0, and m is not less than n.
The reserved subframes for SI message delivery are not the subframes reserved for delivering paging messages, and are not the subframes for MIB messages and SIB1 messages delivery, that is, the subframes already fixed to other messages in the system broadcast message and the subframes reserved for paging messages, and are not used for reserving SI messages delivery.
And on the reserved subframe used for issuing the SI message, if no SI message is issued, dynamically scheduling the subframe with a message with lower priority than the common control message.
For the random access response message:
referring to fig. 3, fig. 3 is a schematic diagram illustrating a process of issuing a random access response message in the embodiment of the present application. The method comprises the following specific steps:
A Random Access Response (RAR) message is issued in a transmission window (RaRspWindowSize), and in order to ensure normal issuing of the RAR message, an issued subframe needs to be reserved for the RAR message under a small bandwidth. The length of RaRspWindowSize is r subframes.
The reserved t subframes are not subframes reserved for issuing paging messages or subframes reserved for issuing system broadcast messages; t is an integer greater than 0.
That is, the subframes already fixed to the system broadcast message and the subframes reserved for the paging message are not used for reserving the random access response message.
And if no RAR message is issued in the reserved t subframes for RAR issuing, dynamically scheduling the messages with lower priority than the common control messages in the t subframes.
The following describes the embodiments of the present invention in further detail with reference to the LTE system.
For example, in the FDD system, the semi-persistent scheduling period is 20ms, the IMSI of a user is 460900555550051, the UE _ ID is IMSI mod 1024 — 355, T is 1280ms, nB configuration T/2 is 640, N is 640, and Ns is 1.
SFN mod T＝(T div N)×(UE_ID mod N)＝710
The location of the paging frame may occur at SFN (128 × i) +710, (where i is 0 to N, but SFN < ═ 1024), and the location of the paging frame may be 710, 838, 966. Each SFN is 10 ms.
i_s＝floor(UE_ID/N)mod Ns＝0
For FDD system, table look-up 1 indicates that the possible subframe positions of the PS-Paging message of the user are subframe number 9 on the 710, 838, 996 radio frame. Reserving a 9 th subframe as a PS-Paging issued subframe in each semi-persistent scheduling period.
The SIB2 message and SIB3 message are mapped for transmission in SI2 and SI3 messages, respectively, and are transmitted 4 times in one SI-window (40ms), SI2 is initially transmitted on #2 subframe, and the remaining 3 retransmissions are distributed for transmission on #12, #22, #32 subframe. The SI3 message may be transmitted on the next 40ms SI-window with transmission subframes # 2, #12, #22, # 32. In a 20ms voice period, subframes # 0, #2, #5, #10, and #12 are transmission subframes of the SI message, and are not available for semi-persistent scheduling of group voice.
For RAR transmission, the length of the transmission window RaRspWindowSize is 10 subframes, 4 subframes are reserved for the RaRspWindowSize every 20ms for trying to issue, and the subframe numbers reserved for the RaRspWindowSize are #3, #8, #13, # 18.
The remaining subframes except the reserved subframes may be used for semi-persistent scheduling.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating reservation allocation of a paging subframe, a system message subframe, and a random access response subframe in the embodiment of the present application.
In fig. 4, subframe 0 and subframe 10 are used for issuing MIB messages; subframe 1 is used for issuing a group paging message (G-paging); subframe 2 and subframe 12 are used for issuing SI messages; subframe 3, subframe 13 and subframe 18 are used for issuing RAR messages; subframe 5 is used for sending down the SIB1 message; the subframe 9 is used for issuing a Paging message (PS-Paging) of a PS service; the remaining subframes 4, 6, 7, 11, 14, 15, 16, 17, and 19 are semi-persistent scheduling available subframes.
Based on the same inventive concept, the application also provides a public control message issuing device which is applied to a small-bandwidth network. Referring to fig. 5, fig. 5 is a schematic structural diagram of an apparatus applied to the above technology in the embodiment of the present application. The device includes: a determination unit 501 and a reservation unit 502;
a determining unit 501, configured to determine a paging subframe according to the configured nB;
a reserving unit 502, configured to reserve the paging subframe determined by the determining unit 501 for issuing the paging message, and disallow semi-persistent scheduling on the reserved paging subframe for issuing the paging message.
Preferably, the first and second liquid crystal films are made of a polymer,
nB is configured according to the time delay requirement; wherein, the configured nB is T/2, T/4, T/8, T/16 or T/32.
Preferably, the first and second liquid crystal films are made of a polymer,
a reservation unit 502, further configured to carry, for SI messages other than MIB and SIB1 messages, only one SIB message on each SI message; when the SI-window is m wireless frames, the number of times of transmitting SI messages in the SI-window is n, wherein m and n are integers larger than 0, and m is not smaller than n; in a semi-static scheduling period, reserving a subframe for issuing an SI message, and not allowing semi-static scheduling resource allocation on the reserved subframe for issuing the SI message; the reserved subframe used for issuing the SI message is not a subframe reserved for issuing the paging message and is not a subframe used for issuing the MIB message and the SIB1 message.
Preferably, the first and second liquid crystal films are made of a polymer,
a reserving unit 502, further configured to reserve t subframes for issuing RAR messages within each r subframe length in the semi-persistent scheduling period, where semi-persistent scheduling resource allocation is not allowed on the reserved t subframes; the reserved t subframes are not subframes reserved for issuing paging messages or subframes reserved for issuing system broadcast messages; r subframes are the length of the RAR message transmission window, and t is an integer larger than 0.
Preferably, the first and second liquid crystal films are made of a polymer,
a reservation unit 502, further configured to perform dynamic scheduling on a reserved paging subframe for issuing a paging message, if no paging message is issued, comparing a message with a low priority level of a common control message on the paging subframe; on a reserved subframe used for issuing the SI message, if no SI message is issued, dynamically scheduling the subframe compared with a message with low priority of the common control message; and if no RAR message is issued in the reserved t subframes for issuing the RAR message, dynamically scheduling the messages with lower priority than the common control message in the t subframes.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
In summary, the paging subframe is determined according to the configured nB, and the determined paging subframe is reserved for issuing the paging message, and semi-persistent scheduling is not allowed to be performed on the reserved paging subframe. The scheme of reserving the paging sub-frame in advance can ensure the issuing of the common control message under the small bandwidth.
And meanwhile, subframes are reserved for the transmission of system broadcast messages and random access response messages, so that the transmission of common control messages under small bandwidth can be ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for issuing a common control message is applied to a small-bandwidth network, and is characterized by comprising the following steps:
determining a paging subframe according to the configured number nB of paging groups;
and reserving the determined paging subframe for transmitting the paging message, and not allowing semi-static scheduling on the reserved paging subframe for transmitting the paging message.
2. The method of claim 1,
nB is configured according to the time delay requirement; wherein, the configured nB is T/2, T/4, T/8, T/16 or T/32.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
for system information, SI, messages other than management information base, MIB, and system information block, SIB1 messages, only one SIB message is carried on each SI message;
when the SI-window is m wireless frames, the number of times of transmitting SI messages in the SI-window is n, wherein m and n are integers larger than 0, and m is not smaller than n;
in a semi-static scheduling period, reserving a subframe for issuing an SI message, and not allowing semi-static scheduling resource allocation on the reserved subframe for issuing the SI message; the reserved subframe used for issuing the SI message is not a subframe reserved for issuing the paging message and is not a subframe used for issuing the MIB message and the SIB1 message.
4. The method of claim 3, further comprising:
in a semi-static scheduling period, within the length of each r subframes, reserving t subframes for transmitting RAR messages, and not allowing semi-static scheduling resource allocation on the reserved t subframes; the reserved t subframes are not subframes reserved for issuing paging messages or subframes reserved for issuing system broadcast messages; r subframes are the length of the RAR message transmission window, and t is an integer larger than 0.
5. The method of claim 4, further comprising:
if no paging message is issued on the reserved paging subframe for issuing the paging message, performing dynamic scheduling on the paging subframe by comparing with a message with low priority of the public control message;
on a reserved subframe used for issuing the SI message, if no SI message is issued, dynamically scheduling the subframe compared with a message with low priority of the common control message;
and if no RAR message is issued in t reserved subframes used for Random Access Response (RAR) message issuing, dynamically scheduling the messages with lower priority than the public control messages in the t subframes.
6. A public control message issuing device is applied to a small-bandwidth network, and is characterized by comprising: a determining unit and a reserving unit;
the determining unit is used for determining the paging subframe according to the configured paging group number nB;
and the reservation unit is used for reserving the paging subframe determined by the determination unit for transmitting the paging message and not allowing semi-static scheduling on the reserved paging subframe for transmitting the paging message.
7. The apparatus of claim 6,
nB is configured according to the time delay requirement; wherein, the configured nB is T/2, T/4, T/8, T/16 or T/32.
8. The apparatus according to claim 6 or 7,
the reservation unit is further configured to only carry one SIB message per SI message for system information SI messages other than management information base MIB and system information block SIB1 messages; when the SI-window is m wireless frames, the number of times of transmitting SI messages in the SI-window is n, wherein m and n are integers larger than 0, and m is not smaller than n; in a semi-static scheduling period, reserving a subframe for issuing an SI message, and not allowing semi-static scheduling resource allocation on the reserved subframe for issuing the SI message; the reserved subframe used for issuing the SI message is not a subframe reserved for issuing the paging message and is not a subframe used for issuing the MIB message and the SIB1 message.
9. The apparatus of claim 8,
the reservation unit is further configured to reserve t subframes within each r subframe length in a semi-persistent scheduling period for issuing a RAR message, and not allow semi-persistent scheduling resource allocation on the reserved t subframes; the reserved t subframes are not subframes reserved for issuing paging messages or subframes reserved for issuing system broadcast messages; r subframes are the length of the RAR message transmission window, and t is an integer larger than 0.
10. The apparatus of claim 9,
the reservation unit is further used for dynamically scheduling messages with low priority compared with the common control messages on the paging sub-frames on the reserved paging sub-frames for sending the paging messages if no paging message is sent; on a reserved subframe used for issuing the SI message, if no SI message is issued, dynamically scheduling the subframe compared with a message with low priority of the common control message; and if no RAR message is issued in the reserved t subframes for issuing the RAR message, dynamically scheduling the messages with lower priority than the common control message in the t subframes.
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